JP6924651B2 - Tunnel emergency equipment - Google Patents

Description

The present invention relates to a tunnel emergency facility for monitoring an abnormality in a tunnel by connecting equipment such as a fire detector and a fire hydrant device installed in the tunnel to a disaster prevention receiving panel of a monitoring center by an optical line.

Conventionally, emergency equipment has been installed in tunnels such as automobile-only roads in order to protect people and vehicles from fire accidents that occur in the tunnel.

Such emergency equipment includes a fire detector, a manual notification device, and an emergency telephone for fire monitoring and notification, a fire extinguishing plug device for extinguishing a fire and preventing the spread of fire, and a tunnel frame. In order to protect from fire, water spray that sprinkles fire extinguishing water is installed from the water spray head, and the equipment of emergency equipment is connected to the transmission line from the disaster prevention receiver installed in the monitoring center for monitoring and control. We are building emergency equipment for the tunnel.

Tunnel emergency equipment consisting of disaster prevention receivers and equipment is roughly divided into R-type transmission system and P-type direct delivery system. In the R-type transmission method, equipment such as a fire detector whose address is set is connected to the transmission line by the signal line cable drawn from the disaster prevention receiver, and individual management is performed to detect and control each equipment by transmission control. The P-type direct delivery method that enables this is divided into predetermined section units according to the type of equipment, and multiple equipment belonging to the same section are connected to the signal line drawn out in each section, and detection is performed for each signal line. Take control.

R-type transmission type tunnel emergency equipment has various advantages in terms of function and management because it can be detected and controlled individually by equipment, but in general, transmission control functions are provided for equipment such as fire detectors. If it is provided and the transmission distance is long, it is necessary to provide a relay amplification board, which is expensive.

On the other hand, the P-type direct delivery type tunnel emergency equipment does not need to provide a transmission control function for the fire detector, and it is not necessary to provide a relay amplification panel even if the transmission distance becomes long. Therefore, the R-type transmission type is used. The system configuration is simpler and cheaper than that of the above, but in addition to the fact that individual management that detects and controls each equipment cannot be performed, the type of equipment such as fire detectors and manual notification devices and the division of equipment Since a dedicated signal line is pulled out separately to connect equipment, the number of wires is large, and if the tunnel length is long, the system configuration cost may be rather high.

As tunnel emergency equipment, we will build R-type transmission method or P-type direct delivery type tunnel emergency equipment in consideration of the advantages and disadvantages of R-type transmission method and P-type direct delivery method, tunnel length, vehicle traffic volume, etc. I try to do it.

Japanese Unexamined Patent Publication No. 2002-246962 Japanese Unexamined Patent Publication No. 11-128381

By the way, in recent tunnel emergency equipment, equipment is connected to a metal transmission line from which a signal line cable is pulled out from a disaster prevention receiver, and the metal transmission line is easily affected by electrical noise. Since the signal attenuation increases as the transmission distance increases, relay amplification boards are installed at regular intervals, and if the usage period is prolonged, electrical characteristics may deteriorate due to insulation deterioration and communication problems may occur. There is sex. Furthermore, in recent years, there has been a tendency for tunnel lengths to exceed 10 kilometers, making it difficult to handle with metal transmission lines.

In order to solve such a problem, it is conceivable to use an optical line using an optical fiber cable as a transmission line for tunnel emergency equipment, but there is no example of using an optical line for tunnel emergency equipment, and an optical line is used. Construction of emergency tunnel equipment has emerged as a new issue.

In addition, when an optical line is used for tunnel emergency equipment, it is reliable to maintain the communication connection between the disaster prevention receiver and the terminal side in the event of a failure such as a disconnection of the optical line or a decrease in the strength of the optical signal. Recovery support is required.

An object of the present invention is to provide a tunnel emergency facility having high fault tolerance using an optical line that can appropriately deal with a problem of a metal line and an increase in tunnel length.

(Corresponding to disconnection failure of tunnel emergency equipment)
The present invention
A predetermined equipment arranged in the tunnel,
A disaster prevention receiver that monitors equipment and equipment
A regular optical line pulled out from the disaster prevention receiver into the tunnel,
A spare optical line pulled out from the disaster prevention receiver into the tunnel,
An optical relay amplifier connected in the middle of each line of the regular optical line and the spare optical line,
Termination equipment connected to the end of each line of the regular optical line and the spare optical line ,
A tunnel emergency equipment provided with,
Equipment is connected to a regular optical line,
Optical repeater amplifiers,
Normal state, each of the optical signal relay and amplification between the upstream side and the downstream side between the upstream side and downstream side of the conventional optical line and spare optical line,
When a disconnection failure on the upstream side of the regular optical line is detected, a disconnection failure signal is transmitted to the disaster prevention receiver or another optical relay amplifier adjacent to the upstream side via the spare optical line, and the optical line is optical by the spare optical line. together to transmit and receive signals, bypassing relay optical signal between the upstream side and downstream side of the upstream side and the common optical line of spare optical line,
When receiving the disconnection fault signal from the other optical amplifier repeater or terminating device located downstream side, The rewritable relaying optical signals between the upstream side and the downstream side of the conventional optical line, upstream side of the conventional optical line the optical signal was backhaul between the downstream side of the spare optical line and,
Disaster prevention receiving board is,
Normally , optical signals are transmitted and received via a regular optical line,
When receiving the disconnection fault signal from the optical amplifier repeater adjacent the downstream side, in addition to the conventional optical line, and receives an optical signal by spare optical line,
When the termination device detects a disconnection failure of the regular optical line, the termination device transmits the disconnection failure signal to the optical relay amplifier adjacent to the upstream side via the spare optical line, and transmits and receives the optical signal by the spare optical line. , backhaul optical signals between the spare optical line with conventional optical line,
It is characterized by that.
In addition, it is branched to the regular optical line and connected to the equipment by a signal line. The optical signal received from the regular optical line is converted into an electric signal and output to the equipment, and the electric signal input from the equipment. Is provided with an optical converter that converts the signal into an optical signal and transmits it to a regular optical line.

Here, the ascending side means the side close to the disaster prevention receiving panel, and the descending side means the side close to the terminal device.

(Monitoring of disconnection failure by test signal)
Disaster receiving board sends periodically test signal on the normal optical line,
Optical repeater amplifiers and terminator, if the test signal from the disaster prevention receiving plate is broken, detects the disconnection failure of the conventional optical line.

(Countermeasures against light intensity reduction obstacles in tunnel emergency equipment)
In another embodiment of the invention,
A predetermined equipment arranged in the tunnel,
A disaster prevention receiver that monitors equipment and equipment
A regular optical line that was pulled out from the disaster prevention receiver into the tunnel and connected to equipment,
A spare optical line pulled out from the disaster prevention receiver into the tunnel,
An optical relay amplifier connected in the middle of each line of the regular optical line and the spare optical line,
Termination equipment connected to the end of each line of the regular optical line and the spare optical line ,
A tunnel emergency equipment provided with,
Equipment is connected to a regular optical line,
Optical repeater amplifiers,
Normal state, each of the optical signal relay and amplification between the upstream side and the downstream side between the upstream side and downstream side of the conventional optical line and spare optical line,
When a failure to reduce the intensity of the optical signal received from the upstream side of the regular optical line is detected, the light intensity reduction failure signal is transmitted to the disaster prevention receiver or another optical relay amplifier adjacent to the upstream side via the spare optical line. Then, the transmission and reception of the optical signal by the regular optical line is stopped to transmit and receive the optical signal by the spare optical line, and the optical signal is transmitted between the upstream side of the spare optical line and the upstream and downstream sides of the regular optical line. bypass relays,
Another is when receiving the light intensity decreases fault signal from the optical amplifier repeater, or terminator, The rewritable stop sending and receiving optical signals by conventional optical line, upstream side and the protection Optical Line conventional optical line positioned on the downstream side the optical signal was backhaul between the down side,
Disaster prevention receiving board is,
Normally , optical signals are transmitted and received via a regular optical line,
When receiving the light intensity decreases fault signal from the optical amplifier repeater adjacent the downstream side, and stops the transmission and reception of the optical signal by the conventional optical line, and receives an optical signal by spare optical line,
Termination device, when detecting the intensity disorder of reduced optical signal received from the common optical line, conventional optical line transmits light intensity decreases fault signal via the spare optical line in the optical repeater amplifier adjacent to the upstream side It stops the transmission and reception of optical signals by, you backhaul optical signals between the spare optical line with conventional optical line,
It is characterized by that.
In addition, it is branched to the regular optical line and connected to the equipment by a signal line. The optical signal received from the regular optical line is converted into an electric signal and output to the equipment, and the electric signal input from the equipment. Is provided with an optical converter that converts the signal into an optical signal and transmits it to a regular optical line.

(Monitoring of light intensity reduction failure by test signal)
Disaster receiving board sends periodically test signal on the normal optical line,
Optical repeater amplifiers and terminator, if the reception level of the test signal falls below a predetermined threshold value, detects the intensity disorder of reduced optical signal.

(Monitoring the disconnection of the spare optical line by patrol of the test signal)
Disaster receiving board sends periodically test signal on the normal optical line,
Optical repeater amplifier, when receiving a test signal from the up side of the conventional optical line, relays a test signal to the downlink side of the conventional optical line, a spare when receiving a test signal from the downstream side of the protection Optical Line The test signal is relayed to the upstream side of the optical line,
Termination device, when receiving a test signal from the common optical line, transmits the test signal to the spare optical line.

(Monitoring the disconnection of the spare optical line by turning back the test signal)
Optical repeater amplifier, when receiving a test signal from the up side of the conventional optical line, together with the relays test signal to the downlink side of the conventional optical line, relays folded back test signal to the upstream side of the spare optical line.

(Judgment of disconnection of spare optical line by disaster prevention receiver)
Disaster receiving board, if there is no reception of the test signal from the spare optical line from the transmission of the test signal within a predetermined waiting time, determines the disconnection of the spare optical line, the optical amplifier repeater adjacent the downstream side instructs the transmission of the test signal through the common optical line in, it notifies the breakage of the preliminary light line between the optical amplifier repeater adjacent the downstream side.

(Judgment of disconnection of spare optical line by optical relay amplifier)
Optical repeater amplifier, when there is no reception of the test signal from the down side of the spare optical line from the transmission of the test signal on the down side of the conventional optical line within a predetermined waiting time, the down side spare optical line Judging the disconnection, instructing the other optical relay amplifier adjacent to the downlink side or the termination device adjacent to the downlink side to transmit the test signal via the regular optical line, and the spare optical line to the disaster prevention receiver on the uplink side. A disconnection failure signal indicating a disconnection of the spare optical line with the optical relay amplifier adjacent to the downlink side or a disconnection of the spare optical line with the termination device adjacent to the downlink side is transmitted via. Notify.

(Waiting time for disaster prevention receiver and optical relay amplifier)
The waiting time for determining the disconnection of the spare optical line is set so as to be sequentially long from the terminal device toward the disaster prevention receiver.

(Effects of dealing with disconnection failures in emergency tunnel equipment)
According to the present invention, a predetermined equipment arranged in a tunnel, a disaster prevention receiver for monitoring the equipment, a regular optical line drawn out from the disaster prevention receiver into the tunnel, and a disaster prevention receiver pulled out into the tunnel. and the optical line spare, an optical repeater amplifier connected to the middle the lines of conventional optical line and spare optical line, a terminating device connected to each line termination conventional optical line and spare optical line, conventional light while being branched and connected to the line, it is connected by a signal line to a facility device, with the optical signal received from the common optical line into an electric signal and outputs the equipment, an electrical signal input from the equipment into optical signals a tunnel emergency facility and an optical transducer for transmitting converted to the customary optical line, equipment is connected to a common optical line, the optical amplifier repeater is normal, the upstream side of the conventional optical line and down the respective optical signals between and upstream side and downstream side of the protection optical line between side relay amplification, when detecting an upstream side of the breakage failure of the conventional light line, disaster prevention receiving plate or the uplink side A disconnection failure signal is transmitted to another adjacent optical relay amplifier via the spare optical line to transmit and receive the optical signal by the spare optical line, and the upstream side of the spare optical line and the upstream side and the downstream side of the regular optical line are transmitted. When an optical signal is bypassed to and from the side and a disconnection failure signal is received from another optical relay amplifier or termination device located on the downstream side, the optical signal is transmitted between the upstream side and the downstream side of the regular optical line. the rewritable relays, bypassing relay optical signal between the upstream side and the downstream side of the protection optical line conventional optical line, disaster prevention receiving board is normal is to transmit and receive optical signals by conventional optical line, when receiving the disconnection fault signal from the optical amplifier repeater adjacent the downstream side, in addition to the conventional optical line, and receives an optical signal by the protection optical line termination device, when detecting disconnection failure of conventional optical line by spare optical line transmits a disconnection fault signal to the optical amplifier repeater adjacent the upstream side causes transmit and receive optical signals, to so that to backhaul the optical signals between the spare optical line with conventional optical line Therefore, for example, when the regular optical line is disconnected between the disaster prevention receiving board and the optical relay amplifier, the optical relay amplifier located on the downstream side of the disconnection point detects the disconnection failure, and the disaster prevention receiving board is connected via the spare optical line. By transmitting the disconnection failure signal, the disaster prevention receiver sends and receives the optical signal to the spare optical line in addition to the regular optical line, and the optical relay amplifier that detects the disconnection failure is the backup optical line and the regular optical line. The optical signal is bypassed and relayed between them, so that the optical converter connected to the downstream side of the disconnection point is a spare optical by bypass relaying from the optical relay amplifier. The optical signal folded back from the line to the regular optical line will be transmitted and received, and even if a disconnection failure occurs in the regular optical line, the light will be transmitted between the disaster prevention receiver and all the optical converters connected to the regular optical line. It enables continuous transmission and reception of signals.

Such a disconnection failure of a regular optical line occurs between an optical relay amplifier or between an optical relay amplifier and a termination device, and a detour relay from the optical relay amplifier or the termination device that detects the disconnection failure. As a result, the optical converter connected to the downlink side of the disconnection point sends and receives the optical signal folded back from the spare optical line to the regular optical line, and even if the regular optical line has a disconnection failure, the regular optical line It is possible to continuously send and receive optical signals to and from all optical converters connected to the line.

(Effect of monitoring disconnection failure by test signal)
Also, disaster prevention receiving board may periodically test signal transmitted to the conventional optical line, the optical amplifier repeater and terminator, if the test signal from the disaster prevention receiving board is interrupted, detect disconnection failure of the conventional optical line Therefore, the state of the regular optical line that is normally used is constantly monitored, and if a line failure such as a disconnection occurs, the optical relay amplifier or termination device located on the downstream side of the disconnection point breaks the wire. Failure is detected, recovery is reliably performed for optical line disconnection failures, fault tolerance is improved, and communication reliability is ensured.

(Effects of dealing with light intensity reduction obstacles in tunnel emergency equipment)
Further, in another embodiment of the present invention, a predetermined equipment arranged in the tunnel, a disaster prevention receiver for monitoring the equipment, a regular optical line drawn out from the disaster prevention receiver into the tunnel, and the like. At the end of each line of the spare optical line drawn out from the disaster prevention receiver board into the tunnel, the optical relay amplifier connected in the middle of each line of the regular optical line and the spare optical line, and each line of the regular optical line and the spare optical line. It is provided corresponding to the connected termination device and equipment, is branched to the regular optical line and is connected to the equipment by a signal line, and the optical signal received from the regular optical line is converted into an electric signal and installed. a tunnel emergency facility and an optical transducer for transmitting converted to the customary optical network to an optical signal to an electrical signal input from the equipment to output to a device, equipment is connected to a common optical line , optical repeater amplifiers, normal state, each of the optical signal between the upstream side and the downstream side between the upstream side and downstream side of the conventional optical line and standby optical line to relay amplification, up side of the conventional optical line When the intensity reduction failure of the optical signal received from is detected, the optical intensity reduction failure signal is transmitted to the disaster prevention receiver or another optical relay amplifier adjacent to the upstream side via the spare optical line, and the optical line is used. The transmission and reception of the optical signal is stopped, the optical signal is transmitted and received by the spare optical line, and the optical signal is bypassed and relayed between the upstream side of the spare optical line and the upstream and downstream sides of the regular optical line, and the downlink is performed. when receiving the light intensity decreases fault signal from the other optical amplifier repeater or terminating device positioned on the side, the rewritable stop sending and receiving optical signals by conventional optical line, the upstream side and the protection optical line conventional optical line the optical signal was backhaul between the down side, disaster prevention receiving board is normal is to transmit and receive optical signals by conventional optical line, when receiving the light intensity decreases fault signal from the optical amplifier repeater adjacent the downstream side It stops the transmission and reception of the optical signal by the conventional optical line, and receives an optical signal by the protection optical line termination device, when detecting the intensity disorder of reduced optical signal received from the common optical line, upstream side An optical intensity reduction failure signal is transmitted to an optical relay amplifier adjacent to the optical relay amplifier via a spare optical line to stop transmission and reception of the optical signal by the regular optical line, and an optical signal is transmitted between the spare optical line and the regular optical line. since it so that to backhaul, for example by a connection failure such as an optical connector of the conventional optical line in disaster prevention receiving Edition, strength reduction disorders level of the optical signal in the connected optical repeater amplifier adjacent to disaster prevention receiving plate is reduced When is detected, the transmission and reception of optical signals from the disaster prevention receiver to the regular optical line is stopped, and Instead of this, the transmission and reception of the optical signal to the spare optical line is switched, and the optical relay amplifier that detects the optical intensity reduction failure relays the optical signal from the spare optical line to the upstream and downstream sides of the regular optical line by bypass. For this reason, the optical converter connected to the downlink side such as the connection failure part of the optical connector sends and receives the optical signal returned from the spare optical line to the regular optical line by the bypass relay of the optical relay amplifier, and the regular optical line is transmitted and received. Even if an optical intensity reduction failure occurs in the line, it is possible to continuously transmit and receive optical signals to and from all optical converters connected to the regular optical line.

In addition, since the transmission / reception of the optical signal from the disaster prevention receiver that caused the connection failure of the optical connector to the regular optical line is stopped, the optical relay amplifier may collide with the optical signal bypassed from the spare optical line. There is no.

(Effect of monitoring light intensity reduction failure by test signal)
Also, disaster prevention receiving board may periodically test signal transmitted to the conventional optical line, the optical amplifier repeater and terminator, if the reception level of the test signal falls below a predetermined threshold value, the intensity of the optical signal decreases disorders Is detected, so that the decrease in the intensity of the optical signal of the regular optical line that is normally used is constantly monitored. The relay amplifier or the termination device detects the light intensity reduction failure, and the recovery is surely performed against the light intensity reduction failure, the failure tolerance is improved, and the communication reliability is ensured.

(Effect of monitoring the disconnection of the spare optical line by patrol of the test signal)
Also, disaster prevention receiving board sends periodically test signal on the normal optical line, the optical repeater amplifiers, relays test signal to the downlink side of the conventional optical line when receiving a test signal from the up side of the conventional optical line Then, when the previous test signal is received from the downlink side of the spare optical line, the test signal is relayed to the uplink side of the spare optical line, and the termination device is used as a spare when the test signal is received from the regular optical line. In order to transmit the test signal to the optical line, the test signal is sent from the disaster prevention receiver to the termination device via the optical relay amplifier by the regular optical line, and the optical relay amplifier is again connected from the termination device by the spare optical line. By being sent to the disaster prevention receiver via the system, it patrolls between the regular optical line and the spare optical line, and when the patrolling test signal is cut off, in addition to the disconnection of the regular optical line, it is reserved. It is possible to reliably determine the disconnection of the optical line.

(Effect of monitoring the disconnection of the spare optical line by turning back the test signal)
Further, the optical amplifier repeater, when receiving a test signal from the up side of the conventional optical line, together with the relays test signal to the downlink side of the conventional optical line, by folding the test signal to the upstream side of the preliminary light line relaying Therefore, the test signal circulates between the regular optical line and the spare optical line for each optical relay amplifier unit and terminating device unit, and the patrolling test signal is cut off, so that the regular optical line In addition to the disconnection of the spare optical line, the disconnection of the spare optical line can be reliably determined.

(Effect of preliminary optical line disconnection judgment by disaster prevention receiver)
Disaster receiving board, if there is no reception of the test signal from the spare optical line from the transmission of the test signal within a predetermined waiting time, determines the disconnection of the spare optical line, the optical amplifier repeater adjacent the downstream side It instructs the transmission of the test signal through the common optical line, since you so that to inform the breakage of the preliminary light line between the optical amplifier repeater adjacent the downstream side, disconnection failure spare optical line If it occurs, the disaster prevention receiver located on the upstream side of the disconnection point instructs other optical relay amplifiers located on the downstream side of the disconnection point to transmit the test signal via the regular optical line, so that the disconnection is reserved. The disconnection monitoring is continued by continuing the circulation of the test signal that bypasses the optical line, and at the same time, the disaster prevention receiver itself determines the disconnection point of the spare optical line to notify the disconnection of the spare optical line. It is possible to take measures to repair the broken spare optical line.

(Effect of preliminary optical line disconnection judgment by optical relay amplifier)
Further, the optical repeater amplifier, when there is no reception of the test signal from the down side of the spare optical line from the transmission of the test signal on the down side of the conventional optical line within a predetermined waiting time, the down side of the spare light Judging the disconnection of the line, instructing another optical relay amplifier adjacent to the downlink side or the termination device adjacent to the downlink side to transmit the test signal via the regular optical line, and making a spare for the disaster prevention receiver on the uplink side. A disconnection failure signal indicating a disconnection of the spare optical line with the optical relay amplifier adjacent to the downlink side or a disconnection of the spare optical line with the termination device adjacent to the downlink side is transmitted via the optical line. and because of the so make notification, if the disconnection failure spare optical line occurs, commonly used in other optical repeater amplifiers or end device optical repeater amplifier located upstream side of the broken point is located on the downstream side of the broken point By instructing the transmission of the test signal via the optical line, the disconnection monitoring is continued by continuing the circulation of the test signal bypassing the disconnected spare optical line, and at the same time, the disconnection position of the spare optical line is determined. By sending the indicated disconnection failure signal to the disaster prevention receiver, it is possible to notify the disconnection of the spare optical line and repair the disconnected spare optical line.

(Effect of waiting time)
In addition, the waiting time for determining the disconnection of the spare optical line is set to be a long time in sequence from the termination device to the disaster prevention receiver. Therefore, for example, when the spare optical line for the termination device is disconnected, the disconnection location Since the waiting time of the optical relay amplifier located on the upstream side of is short and the waiting time becomes longer as it approaches the disaster prevention receiver, the elapsed time from the transmission of the test signal in the optical relay amplifier located on the upstream side of the disconnection point When the predetermined waiting time is reached first, the disconnection of the regular optical line is determined, and the test signal is transmitted upstream by the regular optical line bypassing the disconnection point of the spare optical line. The optical relay amplifier and the disaster prevention receiver receive the test signal from the spare optical line again before the elapsed time from the transmission of the test signal reaches the set waiting time, and the optical relay line is disconnected. It is possible to prevent a problem that multiple optical relay amplifiers and disaster prevention receivers located on the upstream side are judged to have overlapping disconnections.

Explanatory drawing showing the outline of tunnel emergency equipment using optical lines A block diagram showing an embodiment of a disaster prevention receiver and equipment provided in FIG. 1 by a functional configuration. A block diagram showing an embodiment of the controller provided in FIG. 2 by a functional configuration. A block diagram showing an embodiment of the optical relay amplifier provided in FIG. 2 by a functional configuration. A block diagram showing an embodiment of the terminal device provided in FIG. 2 by a functional configuration. Explanatory drawing showing transmission and reception of an optical signal in a normal state The block diagram showing the operation of the optical relay amplifier in the normal mode in the normal state of FIG. A block diagram showing the operation of the terminal device in the normal mode in the normal state of FIG. Explanatory drawing showing transmission and reception of an optical signal when a disconnection failure occurs in a regular optical line between a disaster prevention receiver and an optical relay amplifier. The block diagram which showed the operation of the bypass mode of the optical relay amplifier which performs the bypass relay for the disconnection failure of FIG. Explanatory drawing showing transmission and reception of an optical signal when a disconnection failure occurs in a regular optical line between optical relay amplifiers. Explanatory drawing showing transmission and reception of an optical signal when a disconnection failure occurs in a regular optical line between an optical relay amplifier and an optical network unit. Explanatory drawing showing transmission and reception of an optical signal when a light intensity reduction failure is detected by an optical relay amplifier adjacent to a disaster prevention receiver. Explanatory drawing showing transmission and reception of an optical signal when a light intensity reduction failure is detected in an optical relay amplifier adjacent to the optical relay amplifier. A block diagram showing the operation of the single-pass mode of the optical relay amplifier due to the light intensity reduction failure of FIG. Explanatory drawing showing transmission and reception of an optical signal when a light intensity reduction failure is detected in a terminal device adjacent to an optical relay amplifier. Explanatory drawing showing the bypass transmission of the test signal when the spare optical line between the optical relay amplifiers is disconnected in the disconnection monitoring in which the test signal is circulated from the regular optical line to the spare optical line. Explanatory drawing showing detour transmission of the test signal when the spare optical line between the optical relay amplifier and the termination device is disconnected in the disconnection monitoring in which the test signal is circulated from the regular optical line to the spare optical line. Explanatory drawing showing detour transmission of the test signal when the spare optical line between the disaster prevention receiver and the optical relay amplifier is disconnected in the disconnection monitoring in which the test signal is circulated from the regular optical line to the spare optical line. The detour transmission of the test signal when the spare optical line between the optical relay amplifiers is disconnected is shown in the disconnection monitoring in which the test signal is circulated from the regular optical line to the spare optical line for each optical relay amplifier and termination device. Explanatory drawing

[Overview of emergency tunnel equipment]
FIG. 1 is an explanatory diagram showing an outline of a tunnel emergency facility using an optical line. As shown in FIG. 1, inside the tunnel 10, fire detectors 25 are installed at intervals of 50 meters in the longitudinal direction of the tunnel to detect a flame caused by a fire, and a nozzle is installed to extinguish the fire and prevent the spread of fire. Fire hydrant devices 24 that house the attached hose are installed at intervals of 50 meters.

Further, in the tunnel 10, as equipment other than the fire detector 25 and the fire hydrant device 24, a manual notification device and an emergency telephone are provided for fire notification, and further, in order to protect the tunnel frame and the inside of the duct from a fire. A water spray that sprinkles fire extinguishing water from the water spray head is installed, but the illustration is omitted.

On the other hand, a disaster prevention receiving board 12 is installed in the monitoring center or the like, and a regular optical line 14-1 and a spare optical line 14-2 are pulled out from the disaster prevention receiving board 12 to the tunnel 10, and the regular optical line 14- The equipment of the fire detector 25 and the fire hydrant device 24 installed in the tunnel 10 and the equipment of other emergency equipment are connected to No. 1 via the optical converter 18.

Further, an optical relay amplifier 20 is connected in the middle of the regular optical line 14-1 and the spare optical line 14-2 at predetermined transmission distances to relay and amplify an optical signal. Further, a terminating device 22 is connected to the end of the regular optical line 14-1 and the spare optical line 14-2.

An optical fiber cable such as FTTH is used for the regular optical line 14-1 and the spare optical line 14-2, and optical wavelength division multiplexing (WDM) using, for example, an IP packet or the like is performed.

Further, a power supply line 16 was pulled out from the disaster prevention receiver 12 into the tunnel, and was provided in the optical converter 18, the optical relay amplifier 20, the termination device 22, the fire detector 25, and the fire hydrant device 24 installed in the tunnel. Power is supplied to equipment.

For the disaster prevention receiver 12, fire extinguishing pump equipment 26, cooling pump equipment 27 for ducts, ventilation equipment 28, alarm display board equipment 29, radio rebroadcasting equipment 30, TV monitoring equipment 31, lighting equipment 32 and IG. The slave station equipment 33 and the like are provided, and except that the IG slave station equipment 33 is connected by a data transmission line, the other equipment is individually connected to the disaster prevention receiver 12 by a P-type signal line.

Here, the ventilation equipment 28 is equipment that gives energy to the air in the tunnel by the high blowing wind speed due to the operation of the jet fan installed on the ceiling side in the tunnel to cause a ventilation flow in the longitudinal direction of the tunnel.

The alarm display board equipment 29 is equipment for displaying an abnormality in the tunnel on an electric display board to notify the user in the tunnel. The radio rebroadcasting facility 30 is a facility for allowing a driver or the like to receive information from a road administrator in a tunnel. The TV monitoring equipment 31 is equipment for confirming the scale and position of a fire, operating a water spraying equipment, and grasping the situation in a tunnel when evacuation guidance is performed.

The lighting equipment 32 is equipment for driving and managing the lighting equipment in the tunnel. Further, the IG slave station equipment 33 is a communication equipment that connects the disaster prevention receiver 12 and the remote monitoring and control equipment 35, which is a higher-level equipment provided outside, via the network 34.

[Functional configuration of equipment]
FIG. 2 is a block diagram showing an embodiment of the disaster prevention receiver and the equipment provided in FIG. 1 in terms of functional configuration.

(Disaster prevention receiver)
As shown in FIG. 2, the disaster prevention receiving panel 12 includes a panel control unit 46, and the panel control unit 46 is a function realized by, for example, executing a program. Hardware includes a CPU, a memory, various input / output ports, and the like. Use a computer circuit or the like equipped with.

The panel control unit 46 is provided with two transmission units 48 and an optical transmission / reception unit 50, and a regular optical line 14-1 is pulled out from one optical transmission / reception unit 50 into a tunnel, and the other optical transmission / reception unit 50. A spare optical line 14-2 is pulled out from the tunnel, and an optical converter 18 provided corresponding to, for example, a fire detector 25 and a fire extinguisher device 24 is connected to a branched optical line via an optical distributor 15. Has been done.

The two transmission units 48 and the optical transmission / reception unit 50 for the panel control unit 46 may be a plurality of sets, if necessary. For example, when the disaster prevention receiving panel 12 monitors the disaster prevention equipment of the up tunnel and the down tunnel, at least two sets of two transmission units 48 and an optical transmission / reception unit 50 for the panel control unit 46 are provided.

The panel control unit 46 communicates with a display unit 52 equipped with a liquid crystal display, a printer, etc., an operation unit 54 equipped with various switches, an alarm unit 56 equipped with a speaker, an alarm indicator light, etc., and external monitoring equipment. A modem 58 for connecting the IG slave station equipment 40 is provided, and further, the fire extinguishing pump equipment 26, the cooling pump equipment 27, the ventilation equipment 28, the alarm display board equipment 29, the radio rebroadcasting equipment 30, and the television monitoring equipment shown in FIG. The IO unit 60 to which the 31 and the lighting equipment 32 are connected is provided.

The transmission unit 48 transmits and receives packet signals (electrical signals) according to a predetermined serial communication protocol.

The optical transmission / reception unit 50 converts the packet signal from the transmission unit 48 into an optical signal in a predetermined downlink wavelength band and transmits the optical signal to the optical line, and also transmits the optical signal in the predetermined uplink wavelength band received from the optical line to the packet signal. Converted to (electric signal) and output to the transmission section.

For example, the optical transmitter / receiver 50 is an optical / optical converter (E / O converter) including a laser diode that converts an electric signal into an optical signal, and an optical / optical converter (E / O converter) that includes a photodiode that converts an optical signal into an electric signal. It includes an electric converter (O / E converter) and a WDM filter that separates an optical signal in the upstream wavelength band from the optical line and synthesizes and sends an optical signal in the downlink wavelength band to the optical line.

In the present embodiment, the transmission unit 48 and the optical transmission / reception unit 50 perform, for example, CWDM (coarse WDM) transmission known as optical wavelength division multiplexing communication with a wide wavelength interval, so that the tunnel length exceeds 10 kilometers. However, it can be dealt with appropriately.

The panel control unit 46 instructs the transmission unit 48 corresponding to the regular optical line 14-1 to control the transmission and reception of packet signals to and from the equipment installed in the tunnel via the optical transmission unit 50.

Here, the equipment installed in the tunnel includes detection system equipment such as a fire detector 25, a transmitter 76, and a fire hydrant switch 80 that transmit a detection signal and a switch signal to the panel control unit 46, and panel control. It can be divided into control system equipment such as a red indicator lamp 74 and a response lamp 78 controlled by the unit 46.

Therefore, the panel control unit 46 includes a poll command for sequentially designating the unique IP address assigned to the equipment for the fire detector 25, the transmitter 76, and the fire extinguisher switch 80, which are the equipment of the detection system. It controls the repeated transmission of the call packet signal, and when the detection system equipment receives the call packet signal that matches its own IP address, it sends a response packet signal including its own status information such as fire detection and switch-on. Send back.

Further, the panel control unit 46 has a control packet signal including a control command that specifies a unique IP address when control is required for the red indicator lamp 74 and the response lamp 78, which are the equipment of the control system. When the detection system equipment receives a call packet signal that matches its own IP address, it controls the lighting and blinking of the indicator light.

Note that the panel control unit 46 repeatedly transmits a call packet signal including a polling command in which IP addresses are sequentially specified for the control system equipment, and a response packet indicating each state, as in the case of the detection system equipment. You may have the signal returned.

The specific control by the panel control unit 46 is as follows. When the panel control unit 46 detects a fire by receiving a response packet signal (fire signal) including fire information from the fire detector 25, the alarm unit 56 outputs a fire alarm and other equipment via the IO unit 60. Controls to instruct the interlocking of.

When the panel control unit 46 detects a fire by receiving a response packet signal (fire notification signal) including fire notification information by operating the transmitter 76 provided in the fire hydrant device 24, the panel control unit 46 uses the alarm unit 56 to give a fire alarm. Is output, and control is performed to instruct the interlocking of other equipment via the IO unit 60. Further, the IP addresses of the response lamp 78 and the red indicator lamp 74 provided in the fire hydrant device 24 operated by the transmitter 76 are specified. The control packet signal including the control command is controlled to be transmitted, the response lamp 78 is turned on, and the red indicator lamp 74 is blinked.

On the other hand, the panel control unit 46 instructs the transmission unit 48 to control the normal optical line 14-1 and the spare optical line 14-2 to transmit the test optical signal at predetermined intervals via the optical transmission / reception unit 50. When the termination device 22 normally receives the test optical signal, it sends back the test response optical signal. As a result, the panel control unit 46 normally performs the regular optical line 14-1 and the spare optical line 14-2. I have confirmed that it is working.

(Functional configuration on the equipment side)
As shown in FIG. 2, an optical converter 18 is provided on the equipment side where the fire detector 25 and the fire hydrant device 24 are provided. The optical converter 18 includes an optical transmission / reception unit 62 corresponding to a regular optical line 14-1, and connects the transmission / reception side of the electric signal to a gateway 66 that functions as a signal conversion unit.

The optical transmission / reception unit 62 is the same as the optical transmission / reception unit 50 provided in the disaster prevention receiver 12, and includes an electric / optical converter (E / O converter), an optical / electric converter (O / E converter), and a WDM filter. Converts an optical signal in the downlink wavelength band from the optical line into an electric signal and outputs it to the gateway 66, and also converts an electric signal from the gateway 66 into an optical signal in the uplink wavelength band and outputs it to the optical line. ..

The gateway 66 performs protocol conversion between the IP protocol on the optical line side and the TCP protocol on the equipment side, for example, Ethernet (registered trademark) which is a predetermined LAN protocol. The gateway 66 has connection functions for all seven layers in the OSI basic reference model, but the gateway 66 may be replaced with a router. The router has a connection function of layers 1 to 3 of the OSI basic reference model, and similarly, it is possible to perform protocol conversion between the IP protocol on the optical line side and the predetermined LAN protocol on the equipment device side.

The LAN line 68 is connected to the equipment side of the gateway 66, the fire detector 25 is directly connected to the LAN line 68, and the red indicator lamp 74 and the response lamp 78, which are the equipment equipment of the control system, are controllers. It is connected to the LAN line 68 via the 70, and the transmitter 76 and the fire hydrant switch 80, which are the equipment of the detection system, are connected to the LAN line 68 via another controller 72.

The transmission between the gateway 66 provided in the optical converter 18 and the fire detectors 25 and the controllers 70 and 72 provided in the fire hydrant device is used in the R-type fire alarm system in addition to the transmission by the LAN protocol. It may be used as a fire transmission protocol.

In the case of the fire transmission protocol, the downlink signal from the transmission unit of the gateway 66 to the transmission unit of the fire detector 25 and the controllers 70 and 72 is transmission in voltage mode, and is a voltage pulse that changes the voltage of the transmission line in a predetermined voltage range. Is transmitted as. On the other hand, the uplink signal from the transmission unit of the fire detector 25 and the controllers 70 and 72 to the transmission unit of the gateway 66 is transmission in the current mode, and a signal current is passed through the transmission path at the timing of bit 1 of the transmission data. The uplink signal is transmitted as a so-called current pulse train.

FIG. 3 is a block diagram showing an embodiment of a controller provided on the fire hydrant device side of FIG. 2 by a functional configuration, and FIG. 3 (A) shows a controller used for equipment of a control system. 3 (B) shows the controller used for the equipment of the detection system.

The controller 70 used in the equipment of the control system shown in FIG. 3A includes a terminal control unit 82, a LAN transmission unit 84, and a drive circuit unit 86. The terminal control unit 82 uses a computer circuit or the like provided with a CPU, a memory, various input / output ports, and the like.

A unique IP address is set in the LAN transmission unit 84, and when the address of the packet signal received via the LAN line 68 and the self-address match, the terminal control unit 82 sets the control command in the packet signal. A control signal based on the above is output to the drive circuit 86, and control is performed to blink the red indicator lamp 74 connected as, for example, equipment.

The drive circuit unit 86 keeps the red indicator lamp 74 in the lit state in the normal state. Further, the controller 70 connected to the response lamp 78 shown in FIG. 2 is the same as in FIG. 3 (A).

The controller 72 used in the detection system of FIG. 3B includes a terminal control unit 82, a LAN transmission unit 84, and an input circuit unit 88. A unique IP address is set in the LAN transmission unit 84. For example, a transmitter 76 is connected to the input circuit unit 88 as equipment, and when the switch is turned on by the push button operation of the transmitter 76, the input circuit unit 88 detects the switch on and outputs a fire alarm signal. ..

When the terminal control unit 82 detects the fire report signal from the input circuit unit 88, the terminal control unit 82 instructs the LAN transmission unit 84 to generate and transmit a packet signal in which the IP address of the disaster prevention receiver 12 and the fire report information are set. I do.

It is desirable that the switch used for the transmitter 76 is a non-lock type switch. By using a non-lock type switch for the transmitter 76, it is not necessary to perform a recovery operation after performing the switch operation.

Further, the controller 72 connected to the fire hydrant switch 80 shown in FIG. 2 is the same as in FIG. 3 (B). Further, the fire hydrant switch 80 is a switch that is turned on when the fire hydrant valve opening / closing lever provided in the fire hydrant device 24 is operated to the open position, and a packet signal including a pump start command of the fire hydrant pump equipment is transmitted to the disaster prevention receiving panel 12. Will be done. Further, the fire hydrant switch 80 is connected in parallel with a fire extinguishing pump start switch (not shown) used by the fire brigade provided in the fire hydrant device 24.

Further, since the fire detector 25 of FIG. 2 has a built-in function of the LAN transmission unit, it is not necessary to externally attach a controller. Further, in FIG. 2, although the controllers 70 and 72 are externally attached to the equipment, the equipment may be integrated.

Further, the power supplies of the controllers 70 and 72 shown in FIG. 3 are supplied from the disaster prevention receiving panel 12 by the power supply line 16 as shown in FIG. 1, but in a normal state such as the transmitter 76 and the fire hydrant switch 80. The equipment controller 72 of the equipment shown in FIG. 3B, which is turned off, is provided with a battery power supply, and the controller 72 is operated by the battery power supply in the normal state where the switch is off, and the switch is operated in the event of a fire or inspection. When the above is performed, the power is switched from the disaster prevention receiving panel 12 to operate the controller 72, thereby reducing the power consumption on the equipment side.

Further, regarding the terminal control unit 82 provided with the CPUs of the controllers 70 and 72 of FIGS. 3A and 3B, the power consumption is reduced in the sleep mode in the normal state, and the display control and the switch operation are performed. The sleep mode may be canceled by wake-up to operate in the normal mode.

(Configuration of optical relay amplifier)
FIG. 4 is a block diagram showing an embodiment of the optical relay amplifier provided in FIG. 2 by a functional configuration.

As shown in FIG. 4, the optical relay amplifier 20 includes a regular relay amplification unit 90, a spare relay amplification unit 92, a bypass relay amplification unit 94, a relay amplification control unit 96, and a gateway 98. The signal line connection between the relay amplification control unit 96 and the gateway 98 and the regular relay amplification unit 90, the spare relay amplification unit 92, and the spare relay amplification unit 92 is omitted.

The regular relay amplification unit 90 relays and amplifies an optical signal between the upstream side and the downstream side of the regular optical line 14-1. The relay amplification of the downlink signal by the normal relay amplification unit 90 is performed by the WDM filter 100, the optical / electric converter (O / E converter) 102, the amplifier 104, the electric / optical converter (E / O converter) 106, and the WDM filter. It is carried out in a system consisting of 108.

Further, the relay amplification of the uplink signal by the regular relay amplification unit 90 is performed by the WDM filter 108, the optical / electric converter (O / E converter) 110, the amplifier 112, the switch 114, and the electric / optical converter (E / O conversion). Instrument) 116 and WDM filter 100.

The spare relay amplification unit 92 relays and amplifies an optical signal between the upstream side and the downstream side of the spare optical line 14-2. The relay amplification of the downlink signal by the spare relay amplification unit 92 is performed by a WDM filter 118, an optical / electric converter (O / E converter) 120, an amplifier 122, a switch 124, and an electric / optical converter (E / O converter). ) 126 and WDM filter 128.

Further, the relay amplification of the uplink signal by the spare relay amplification unit 92 is performed by the WDM filter 128, the optical / electric converter (O / E converter) 130, the amplifier 132, and the electric / optical converter (E / O converter) 134. And the system consisting of the WDM filter 118.

The switch 114 provided in the regular relay amplification unit 90 selectively connects the output of the amplifier 112 to its own electric / optical converter 116 or the electric / optical converter 134 of the spare relay amplification unit 92.

The switch 124 provided in the spare relay amplification unit 92 selectively connects the output of the amplifier 122 to its own electric / optical converter 126 or the electric / optical converter 106 of the regular relay amplification unit 90.

The bypass relay amplification unit 94 relays and amplifies an optical signal between the regular optical line 14-1 and the spare optical line 14-2. The optical signals from the regular optical line 14-1 to the spare optical line 14-2 by the bypass relay amplification unit 94 are WDM filter 136, optical / electric converter (O / E converter) 138, amplifier 114, electric / Relay amplification is performed by a system consisting of an optical converter (E / O converter) 142 and a WDM filter 144.

Further, the optical signal from the spare optical line 14-2 to the regular optical line 14-1 by the bypass relay amplification unit 94 is a WDM filter 144, an optical / electric converter (O / E converter) 146, an amplifier 148, and the like. Relay amplification is performed by a system consisting of an electric / optical converter (E / O converter) 150 and a WDM filter 136.

(Control of optical relay amplifier)
The relay amplification control unit 96 of the optical relay amplifier 20 is a function realized by executing a program, for example, and uses a computer circuit having a CPU, a memory, various input / output ports, and the like as hardware.

The relay amplification control unit 96 operates the optical relay amplifier 20 in the normal mode in the normal state, operates the optical relay amplifier 20 in the bypass mode when a disconnection failure of the normal optical line 14-1 is detected, and further operates the other relay amplifier 20 in the bypass mode. When the disconnection failure signal is received from the optical relay amplifier, the optical relay amplifier 20 is operated in the dual path mode.

The relay amplification control unit 96 takes in a test optical signal periodically transmitted from the disaster prevention receiver 12 to the regular optical line 14-1 as a downlink signal, for example, from the output of the optical / electric converter 102 as an electric signal, and takes in the test optical signal. Detects a disconnection failure of the upstream regular optical line 14-1 when the signal is stopped continuously for a predetermined time or cannot be continuously received a predetermined number of times.

When the relay amplification control unit 96 detects a disconnection failure of the regular optical line 14-1 on the upstream side, it instructs the gateway 98 to provide preliminary light to the disaster prevention receiver 12 or another optical relay amplifier 20 located on the upstream side. The disconnection failure signal is transmitted via the line 14-2, and the optical signal is transmitted and received by the spare optical line 14-2.

In addition, the relay amplification unit 96 that detected the disconnection failure of the regular optical line 14-1 on the upstream side
As the operation of the bypass mode, the optical signal is bypass-relayed between the backup optical line 14-2 on the uplink side and the regular optical line 14-1 on the uplink side via the bypass relay amplification unit 94, and the regular relay amplification is performed. By switching the switching units 114 and 124 of the unit 90 and the spare relay amplification unit 92 to the b side, an optical signal is transmitted between the spare optical line 14-1 on the upstream side and the regular optical line 14-1 on the downstream side. Controls to bypass relay.

Further, when the relay amplification unit 96 receives a disconnection failure signal from another optical relay amplifier 20 adjacent to the downlink side, the relay amplification unit 94 for bypass, the normal relay amplification unit 90, and the spare are used as the operation in the dual path mode. By the operation of the relay amplification unit 92, the optical signal is relay-amplified between the upstream regular optical line 14-1 and the downlink regular optical line 14-1, and the uplink side regular optical line 14-1 and the downlink are used. Control is performed to relay and amplify an optical signal to and from the spare optical line 14-2 on the side.

(Functional configuration of terminal device)
FIG. 5 is a block diagram showing an embodiment of the terminal device provided in FIG. 2 by a functional configuration. As shown in FIG. 5, the termination device 22 is provided with a termination control unit 152 and a gateway 154.

Further, in order to transmit an optical signal from the regular optical line 14-1 to the spare optical line 14-2, a WDM filter 156, an optical / electric converter (O / E converter) 158, an amplifier 160, and an electric / optical converter A system including (E / O converter) 162 and a WDM filter 164 is provided.

Further, in order to transmit an optical signal from the spare optical line 14-2 to the regular optical line 14-1, WDM filter 164, optical / electric converter (O / E converter) 166, amplifier 168, electric / optical converter. A system consisting of (E / O converter) 170 and a WDM filter 156 is provided.

The terminal control unit 152 is a function realized by executing a program, for example, and uses a CPU, a memory, a computer circuit having various input / output ports, and the like as hardware.

The termination control unit 152 operates the termination device 22 in the normal mode in the normal state, and operates the termination device 22 in the bypass mode when a disconnection failure of the regular optical line 14-1 is detected.

In the normal mode operation of the terminal control unit 152, by stopping the operation of the amplifiers 160 and 168, the optical signals are transmitted and received independently by the regular optical line 14-1 and the spare optical line 14-2, which is a disaster prevention measure. When the test optical signal periodically transmitted from the receiving panel 12 is received, the control is performed to transmit the test response optical signal.

The terminal control unit 152 takes in a test optical signal periodically transmitted from the disaster prevention receiver 12 to the regular optical line 14-1 as a downlink signal, for example, from the output of the optical / electric converter 158 as an electric signal, and the test optical signal is generated. A disconnection failure of the regular optical line 14-1 is detected when the signal is continuously stopped for a predetermined time or when the signal cannot be continuously received a predetermined number of times.

When the termination control unit 152 detects a disconnection failure of the regular optical line 14-1, the termination control unit 152 instructs the gateway 154 and signals the disconnection failure signal to the optical relay amplifier 20 located on the upstream side via the spare optical line 14-2. Is transmitted, and an optical signal is transmitted and received by the backup optical line 14-2.

Further, the termination control unit 152 that detects the disconnection failure of the regular optical line 14-1 sets the amplifiers 160 and 168 to the operating state as the bypass mode, and between the spare optical line 14-2 and the regular optical line 14-1. Controls the bypass relay of the optical signal.

[Transmission control of tunnel emergency equipment]
(Transmission control under normal conditions)
FIG. 6 is an explanatory diagram showing transmission / reception of an optical signal in a normal state, and the transmission of the optical signal is indicated by a broken line arrow. FIG. 7 is a block diagram showing the operation of the optical relay amplifier in the normal mode in the normal state of FIG. 6, and FIG. 8 is a block diagram showing the operation of the termination device in the normal state of FIG.

As shown in FIG. 6, in a normal state, the disaster prevention receiver 12 transmits and receives an optical signal to the regular optical line 14-1, and emits light to and from a plurality of optical converters 18 connected to the regular optical line 14-1. Signals are transmitted and received, the optical relay amplifiers 20-1 and 20-2 relay and amplify the optical signals of the regular optical line 14-1 in both directions, and the termination device 22 periodically relays and amplifies from the disaster prevention receiver 12. The test response optical signal is transmitted by receiving the test optical signal transmitted to. The optical relay amplifiers 20-1 and 20-2 may be referred to as an optical relay amplifier 20 when it is not necessary to distinguish them in the following description.

In the normal state of FIG. 6, the optical relay amplifier 20 is operating in the normal mode shown in FIG. 7. In the normal mode operation of the optical relay amplifier 20, as shown in FIG. 7, the switch 114 of the regular relay amplification unit 90 and the switch 124 of the spare relay amplifier 92 are switched to the a side, and the bypass relay is relayed. In the amplification unit 94, the optical / electric converters 138 and 146, the amplifiers 140 and 148 and the electric / optical converters 138 and 150 are stopped, and the detour relay function is stopped.

Therefore, in the normal mode of the optical relay amplifier 20, bidirectional relay amplification of the optical signal is individually performed by the operation of the regular relay amplification unit 90 and the spare relay amplification unit 92.

Further, in the state of FIG. 6, as shown in FIG. 8, the termination device 22 operates in the normal mode, the operations of the amplifiers 160 and 160 are stopped, and the regular optical line 14-1 and the spare optical line 14- The optical signal is transmitted and received independently by No. 2, and when the test optical signal periodically transmitted from the disaster prevention receiving panel 12 is received, the test response optical signal is controlled to be transmitted.

(Disruption failure in the regular optical line between the disaster prevention receiver and the optical relay amplifier)
FIG. 9 is an explanatory diagram showing transmission / reception of an optical signal when a disconnection failure occurs in a regular optical line between the disaster prevention receiver and the optical relay amplifier, and FIG. 10 is an optical relay that performs detour relay for the disconnection failure in FIG. It is a block diagram which showed the operation of the bypass mode of an amplifier.

As shown in FIG. 9, when a disconnection failure 180 occurs in the regular optical line 14-1 between the disaster prevention receiver 12 and the optical relay amplifier 20-1, the disconnection failure occurs in the optical relay amplifier 20-1 located on the downlink side. Is detected, and a disconnection failure signal is transmitted to the disaster prevention receiver 12 via the spare optical line 14-2.

The disaster prevention receiver 12 that has received the disconnection failure signal starts transmitting and receiving the same optical signal to the spare optical line 14-2 in addition to transmitting and receiving the optical signal to the regular optical line 14-1 up to that point.

The optical relay amplifier 20-1 that has detected the disconnection failure operates in the bypass mode. As shown in FIG. 10, the operation of the optical relay amplifier 20-1 in the bypass mode is such that the switches 114 and 124 are switched to the b side by the control of the relay amplification control unit 96, and the optical / light of the regular relay amplification unit 90 /. The operations of the electric converter 102, the amplifier 104 and the electric / optical converter 116 are stopped as shown by the broken line, and the electric / optical converter 126, the optical / electric converter 130 and the amplifier 132 of the spare relay amplification unit 92 are stopped. The operation of is stopped as shown by the broken line.

Therefore, as shown in FIG. 9, the optical relay amplifier 20-1 operated in the bypass mode is optical between the equipment optical line 14-2 and the upstream regular optical line 14-1 in which the disconnection failure 180 occurs. Performs a detour relay to send and receive signals. Further, the optical relay amplifier 20 that has detected the disconnection failure performs a detour relay for transmitting and receiving an optical signal to and from the regular optical line 14-1 on the downlink side of the spare optical line 14-2. The other optical relay amplifier 20 and the termination device 22 are operating in the normal mode.

Therefore, the optical detector 18 connected to the regular optical line 14-1 on the upstream side of the location where the disconnection failure 180 occurs transmits and receives an optical signal to and from the disaster prevention receiver 12 by the regular optical line 14-1. The optical detector 18 connected to the regular optical line 14-1 on the downlink side at the location where the disconnection failure 180 occurs is the spare optical line 14-2 via the optical relay amplifier 20-1 operating in the bypass mode. The optical detector 18 connected to the regular optical line 14-1 on the downlink side of the optical relay amplifier 20 that transmits and receives an optical signal to and from the optical relay amplifier 20 and detects a disconnection failure is an optical fiber operating in a bypass mode. Even if an optical signal is transmitted to and received from the spare optical line 14-2 via the relay amplifier 20-1 and a disconnection failure 180 occurs, the disaster prevention receiver 12 is connected to the regular optical line 14-1. Optical signals can be transmitted and received to and from the optical converter 18.

(Disruption failure in the regular optical line between the optical relay amplifiers)
FIG. 11 is an explanatory diagram showing transmission / reception of an optical signal when a disconnection failure occurs in a regular optical line between optical relay amplifiers.

As shown in FIG. 11, when a disconnection failure 180 occurs in the regular optical line 14-1 between the optical relay amplifiers 20-1 and 20-2, the optical relay amplifier located on the downstream side of the location where the disconnection failure 180 occurs. 20-2 detects the disconnection failure and transmits the disconnection failure signal to the optical relay amplifier 20-1 via the spare optical line 14-2, and operates in the bypass mode.

The optical relay amplifier 20-1 located on the upstream side of the location where the disconnection failure 180 occurs operates in the dual path mode by receiving the disconnection failure signal, and the upstream regular optical line 14-1 and the downlink regular optical line 14 The optical signal is relay-amplified between -1, and the optical signal is relay-amplified between the normal optical line 14-1 on the upstream side and the spare optical line 14-2 on the downstream side.

In the dual path mode operation of the optical relay amplifier 20-1, all of the regular relay amplification unit 90, the spare relay amplification unit 92, and the bypass relay amplification unit 94 of the optical relay amplifier 20 shown in FIG. 4 are in the operating state. Mode.

The operation of the bypass mode of the optical relay amplifier 20-2 that has detected the disconnection failure 180 is the same as that shown in FIGS. 9 and 10.

Therefore, the optical detector 18 connected to the regular optical line 14-1 on the upstream side of the location where the disconnection failure 180 occurs is the disaster prevention receiver 12 via the optical relay amplifier 20-1 operating in the dual path mode. The optical detector 18 is connected to the regular optical line 14-1 on the downlink side of the location where the disconnection failure 180 occurs by transmitting and receiving an optical signal to and from the optical detector 18, via an optical relay amplifier 20-2 operating in the bypass mode. The optical detector 18 that transmits and receives an optical signal to and from the spare optical line 14-2 and is connected to the regular optical line 14-1 on the downlink side of the optical relay amplifier 20 that has detected a disconnection failure is bypassed. Even if an optical signal is transmitted to and received from the spare optical line 14-2 via the optical relay amplifier 20 operating in the mode and a disconnection failure 180 occurs between the optical relay amplifiers 20-1 and 20-2. , The disaster prevention receiver 12 can transmit and receive optical signals to and from all the optical converters 18 connected to the regular optical line 14-1.

(Disruption failure in the regular optical line between the optical relay amplifier and the terminal device)
FIG. 12 is an explanatory diagram showing transmission / reception of an optical signal when a disconnection failure occurs in a regular optical line between an optical relay amplifier and a terminal device.

As shown in FIG. 12, when a disconnection failure 180 occurs in the regular optical line 14-1 between the optical relay amplifier 20-2 and the termination device 22, the termination device 22 detects the disconnection failure 180 and outputs a disconnection failure signal. It transmits to the optical relay amplifier 20-2 via the spare optical line 14-2 and operates in the bypass mode.

The optical relay amplifier 20-2 located on the upstream side of the location where the disconnection failure 180 occurs operates in the dual path mode by receiving the disconnection failure signal, and the upstream regular optical line 14-1 and the downlink regular optical line 14- The optical signal is relay-amplified between 1 and the optical signal is relay-amplified between the normal optical line 14-1 on the upstream side and the spare optical line 14-2 on the downstream side.

The operation of the detour mode of the terminating device 22 is a mode in which all of the optical / electric converters 158 and 166, the amplifiers 160 and 168, and the electric / optical converters 162 and 170 shown in FIG. 5 are in the operating state.

Therefore, the photodetector 18 connected to the regular optical line 14-1 on the upstream side of the location where the disconnection failure 180 occurs is the disaster prevention receiver 12 via the optical relay amplifier 20-2 operating in the dual path mode. The photodetector 18 that transmits / receives an optical signal to and from the optical detector 18 and is connected to the regular optical line 14-1 on the downlink side of the location where the disconnection failure 180 occurs is via the termination device 22 operating in the bypass mode. Even if an optical signal is transmitted and received between the spare optical line 14-2 and a disconnection failure 180 occurs between the optical relay amplifier 20-2 and the termination device 22, the disaster prevention receiver 12 is connected to the regular optical line 14-1. Optical signals can be transmitted and received to and from all connected optical converters 18.

[Countermeasures against light intensity reduction obstacles in tunnel emergency equipment]
In the tunnel emergency equipment using optical transmission shown in FIG. 1, in addition to the disconnection failure of the regular optical line 14-1, the regular optical line 14-1 is connected to the disaster prevention receiver 12 and the optical relay amplifier 20. Due to light leakage caused by poor connection of the optical connector, the intensity of the received optical signal is reduced, which may cause a light intensity reduction failure that makes it impossible to send and receive the optical signal. Control is required.

(The optical relay amplifier adjacent to the disaster prevention receiver detects a light intensity reduction failure)
FIG. 13 is an explanatory diagram showing transmission / reception of an optical signal when a light intensity reduction failure is detected by an optical relay amplifier adjacent to the disaster prevention receiver.

As shown in FIG. 13, when the level of the periodically received test optical signal from the common optical line 14 -1 in the optical repeater amplifier 20-1 adjacent to the disaster prevention receiving plate 12 is equal to or less than a predetermined threshold value, the light intensity Degradation failure 190 is detected.

The optical relay amplifier 20-1 that has detected the light intensity reduction failure 190 transmits the light intensity reduction failure signal to the disaster prevention receiving panel 12 via the spare optical line 14-2, and receives the light intensity reduction failure signal for disaster prevention reception. The board 12 stops the transmission / reception of the optical signal by the regular optical line 14-1 and transmits / receives the optical signal by the spare optical line 14-2.

Further, the optical relay amplifier 20-1 that has detected the light intensity reduction failure 190 enters the operation state of the bypass mode, and transmits / receives an optical signal between the spare optical line 14-2 and the upstream regular optical line 14-1. The detour relay is performed, and the optical signal is transmitted and received between the spare optical line 14-2 on the upstream side and the regular optical line 14-1 on the downstream side. The other optical relay amplifier 20-2 and the termination device 22 are operating in the normal mode.

Therefore, the optical detector 18 connected to the regular optical line 14-1 on the upstream side of the optical relay amplifier 20-1 that has detected the optical intensity reduction failure 190 is the optical relay amplifier 20-1 operating in the bypass mode. It transmits and receives an optical signal to and from the spare optical line 14-2 via The optical detector 18 transmits and receives an optical signal to and from the spare optical line 14-2 via the optical relay amplifier 20-1 operating in the detour mode, and receives disaster prevention even if a light intensity reduction failure occurs. The board 12 can transmit and receive optical signals to and from all the optical converters 18 connected to the regular optical line 14-1.

Further, since the transmission / reception of the optical signal to the regular optical line 14-1 of the disaster prevention receiving panel 12 is stopped, the collision of the optical signal due to the detour relay of the optical relay amplifier 20-1 does not occur.

(The optical relay amplifier adjacent to the optical relay amplifier detects a light intensity reduction failure)
FIG. 14 is an explanatory diagram showing transmission / reception of an optical signal when a light intensity reduction failure is detected in an optical relay amplifier adjacent to the optical relay amplifier.

As shown in FIG. 14, when the optical relay amplifier 20-2 adjacent to the downlink side of the optical relay amplifier 20-1 detects a light intensity reduction failure 190 of the optical signal by the regular optical line 14-1, the light intensity decreases. The optical relay amplifier 20-2 that has detected the failure 190 transmits a light intensity reduction failure signal to the optical relay amplifier 20-1 adjacent to the uplink side via the spare optical line 14-2, and transmits the light intensity reduction failure signal. The received optical relay amplifier 20-1 operates in the single-pass mode, stops the transmission and reception of optical signals with the downlink side regular optical line 14-1, and stops the transmission and reception of the optical signal with the downlink side regular optical line 14-1 and the downlink side. An optical signal is transmitted and received between the spare optical lines 14-2.

FIG. 15 is a block diagram showing the operation of the optical relay amplifier in FIG. 14 in the single pass mode. As shown in FIG. 15, in the operation of the optical relay amplifier 20 in the single pass mode, the optical / electric converters 102, 110, the amplifiers 104, 112 and the electric / optical converters 106, 116 provided in the normal relay amplification unit 90 are used. By stopping the operation of, the transmission / reception of the optical signal to the downlink regular optical line 14-1 is stopped, and the bypass relay amplification unit 94 and the spare relay amplification unit 92 are operating.

With reference to FIG. 14 again, the optical relay amplifier 20-2 that has detected the light intensity reduction failure 190 is in the operating state of the bypass mode, and the spare optical line 14-2 and the upstream regular optical line 14-1 are connected to each other. A detour relay for transmitting and receiving an optical signal between them is performed, and a detour relay for transmitting and receiving an optical signal between the spare optical line 14-2 on the upstream side and the regular optical line 14-1 on the downstream side is performed. The terminating device 22 is operating in the normal mode.

Therefore, the optical detector 18 connected to the regular optical line 14-1 on the upstream side of the optical relay amplifier 20-2 that has detected the optical intensity reduction failure 190 is the optical relay amplifier 20- operating in the single-pass mode. In addition to the relay amplification of the optical signal between the normal optical line 14-1 on the upstream side and the spare optical line 14-2 on the downstream side according to 1, the optical relay amplifier 20-2 operating in the bypass mode is used. Optical detection that sends and receives optical signals to and from the spare optical line 14-2, and is connected to the regular optical line 14-1 on the downlink side of the optical relay amplifier 20-2 that has detected the optical intensity reduction failure 190. The device 18 transmits and receives an optical signal to and from the spare optical line 14-2 via the optical relay amplifier 20-2 operating in the detour mode, and even if an optical intensity reduction failure occurs, the disaster prevention receiver 12 Can send and receive optical signals to and from all optical converters 18 connected to the regular optical line 14-1.

Further, since the transmission / reception of the optical signal to the regular optical line 14-1 on the upstream side of the optical relay amplifier 20-2 is stopped by the optical relay amplifier 20-1 operating in the single bus mode, the optical relay amplifier 20 No optical signal collision occurs due to the detour relay of -2.

(Detection of light intensity reduction failure at the terminal device)
FIG. 16 is an explanatory diagram showing transmission / reception of an optical signal when a light intensity reduction failure is detected in the terminal device.

As shown in FIG. 16, when the light intensity reduction failure 190 of the optical signal by the regular optical line 14-1 is detected in the termination device 22, the termination device 22 that has detected the light intensity reduction failure 190 is adjacent to the upstream side. The optical relay amplifier 20-2 that transmits the optical intensity reduction failure signal to the optical relay amplifier 20-2 via the spare optical line 14-2 and receives the optical intensity reduction failure signal operates in the single path mode and downlinks. The transmission and reception of the optical signal with the regular optical line 14-1 on the side is stopped, and the optical signal is transmitted and received between the regular optical line 14-1 on the upstream side and the spare optical line 14-2 on the downlink side.

The terminating device 22 that has detected the light intensity reduction failure 190 operates in the bypass mode, and performs a bypass relay for transmitting and receiving an optical signal between the spare optical line 14-2 and the regular optical line 14-1.

Therefore, the optical detector 18 connected to the regular optical line 14-1 on the upstream side of the termination device 22 that has detected the optical intensity reduction failure 190 is reserved by the optical relay amplifier 20-2 operating in the single-pass mode. Even if the optical signal relayed to the optical line 14-2 is bypass-relayed to the regular optical line 14-1 by the operation of the bypass mode of the device 22, and the termination device 22 detects the optical intensity reduction failure 190, The disaster prevention receiver 12 can transmit and receive optical signals to and from all the optical converters 18 connected to the regular optical line 14-1.

Further, since the transmission / reception of the optical signal to the regular optical line 14-1 on the upstream side of the terminating device 22 is stopped by the operation of the single path mode of the optical relay amplifier 20-2, the optical signal due to the detour relay of the terminating device 22 There is no conflict with.

[Monitoring disconnection of spare optical line]
FIG. 17 is an explanatory diagram showing bypass transmission of the test signal when the spare optical line between the optical relay amplifiers is disconnected in the disconnection monitoring in which the test signal is circulated from the normal optical line to the spare optical line.

(Disconnection monitoring control under normal conditions)
In the embodiment of FIG. 17, in the normal state, the disconnection between the regular optical line 14-1 and the spare optical line 14-2 is monitored by circulating the test signal. Therefore, the panel control unit 46 of the disaster prevention receiving panel 12 shown in FIG. 2 periodically transmits a test signal for disconnection monitoring to the regular optical line 14-1.

Further, the relay amplification control unit 96 of the optical relay amplifier 20 shown in FIG. 4 relays the test signal to the downlink side of the regular optical line 14-1 when the test signal is received from the uplink side of the regular optical line 14-1. When the test signal is received from the downlink side of the spare optical line 14-2, the test signal is relayed to the uplink side of the spare optical line 14-2.

Further, the termination control unit 152 of the termination device 22 shown in FIG. 5 transmits the test signal to the backup optical line 14-2 when the test signal is received from the regular optical line 14-1.

The relay control unit 96 of the optical repeater amplifier 20, spare light line when there is no reception of the test signal from the lower Ri side of the protection Optical Line 14-2 from the transmission of the test signal within a predetermined waiting time 14- Judging the disconnection of 2, the other optical relay amplifier 20 or the termination device 22 adjacent to the downlink side is instructed to transmit the test signal via the regular optical line 14-1, and the disaster prevention receiving panel 12 is instructed to transmit the test signal. A disconnection fault signal indicating a disconnection of the spare optical line 14-2 with the adjacent optical relay amplifier or a disconnection of the spare optical line 14-2 with the adjacent termination device 22 via 14-1. Is transmitted to notify the user.

Further, the board control section 46 of the disaster prevention receiving plate 12, the preliminary light line when there is no reception of the test signal from the lower Ri side of the protection Optical Line 14-2 from the transmission of the test signal within a predetermined waiting time 14- 2 is determined to be disconnected, and the optical relay amplifier 20 adjacent to the downlink side is instructed to transmit a test signal via the regular optical line 14-1 and between the disaster prevention receiver 12 and the adjacent optical relay amplifier 20. Control is performed to notify the disconnection of the spare optical line 14-2.

Here, the waiting time for determining the disconnection of the spare optical line 14-2 on the disaster prevention receiver 12 is the waiting time for determining the disconnection of the spare optical line 14-2 on Tw1 and the optical relay amplifiers 20-1 and 20-2. When Tw2 and Tw3 are set, the time is gradually increased from the terminal device 22 toward the disaster prevention receiving panel 12.
Tw1>Tw2> Tw3
Relationship is set.

In the following description, the control functions of the panel control unit 46 of the disaster prevention receiver board 12 , the relay amplification control unit 96 of the optical relay amplifier 20, and the terminal control unit 152 of the terminal device 22 are the disaster prevention receiver panel 12 and the optical relay amplifier 20. And the control function of the termination device 22 will be described.

(Interruption of spare optical line between optical relay amplifiers)
As shown in FIG. 17, when a disconnection failure 200 occurs in the spare optical line 14-2 between the optical relay amplifier 20-1 and the optical relay amplifier 20-2, the optical relay amplifier located on the upstream side of the disconnection point. 20-1, spare light when there is no reception of the test signal from the lower Ri side of the conventional optical line 14-1 spare optical line 14-2 to a predetermined waiting time Tw2 within the transmission of the test signal to the line 14 Judging the disconnection of 2, the other optical relay amplifier 20-2 adjacent to the downlink side is instructed to transmit the test signal via the regular optical line 14-1, and the disaster prevention receiver 12 is instructed to transmit the spare optical line 14-. A disconnection failure signal indicating a disconnection failure 200 of the spare optical line 14-2 between the adjacent optical relay amplifier 20-2 and the adjacent optical relay amplifier 20-2 is transmitted via 2.

The disaster prevention receiver 12 also stops receiving the test signal from the upstream side of the spare optical line 14-2 due to the disconnection failure 200, but the optical relay amplifier 20-1 causes the disconnection failure in the waiting time Tw1 for determining the disconnection failure. Since it is longer than the waiting time Tw2 to be judged, the test signal by the detour relay of the optical relay amplifier 20-1 is received before the time when the test signal is not received reaches the waiting time Tw1, and the disaster prevention receiving panel 12 duplicates the disconnection failure 200. There is no judgment.

Therefore, as shown by the broken line arrow in FIG. 17, the optical relay amplifier 20-2 receives the test signal received from the upstream side of the spare optical line 14-2 in response to the disconnection failure 200 of the spare optical line 14-2. By relaying to the upstream side of the regular optical line 14-1, the optical relay amplifier 20-1 relays the test signal received from the downstream side of the regular optical line 14-1 to the upstream side of the spare optical line 14-2. The disconnection monitoring is continued by bypassing the faulty part and circulating the test signal from the regular optical line 14-1 to the spare optical line 14-2.

Here, in the bypass relay of the test signal by the optical relay amplifiers 20-1 and 20-2, all of the regular amplification unit 90, the spare amplification unit 92, and the bypass amplification unit 94 of the optical relay amplifier 20 shown in FIG. 4 are used. It is set to the operating state, and it is determined from the received signal that it is a test signal and relayed by detour.

(Interruption of spare optical line between optical relay amplifier and termination device)
FIG. 18 is an explanatory diagram showing bypass transmission of the test signal when the spare optical line between the optical relay amplifier and the termination device is disconnected in the disconnection monitoring in which the test signal is circulated from the normal optical line to the spare optical line. be.

As shown in FIG. 18, when a disconnection failure 200 occurs in the spare optical line 14-2 between the optical relay amplifier 20-2 and the termination device 22, the optical relay amplifier 20-2 located on the upstream side of the disconnection point. the disconnection of the protection optical line 14-1 if there is no reception of the test signal from the lower Ri side of the conventional optical line 14-1 spare optical line 14-2 from the transmission within a predetermined waiting time Tw2 of the test signal to the Is determined, and the termination device 22 adjacent to the downlink side is instructed to transmit the test signal via the regular optical line 14-1, and the disaster prevention receiver 12 is adjacent to the disaster prevention receiver 12 via the spare optical line 14-2. A disconnection failure signal indicating a disconnection failure 200 of the spare optical line 14-2 with the termination device 22 is transmitted to notify the user.

Although disaster prevention receiving plate 12 and the optical repeater amplifier 20-1 no longer receives a test signal from the bottom Ri side of the protection Optical Line 14-2 by disconnection fault 200, respectively latency determines disconnection fault Tw1, Tw2 is Since the optical relay amplifier 20-2 is longer than the waiting time Tw3 for judging the disconnection failure, the test signal due to the detour relay of the optical relay amplifier 20-2 is sent before the time when the test signal is not received reaches the waiting times Tw1 and Tw2. The signal is received, and the disaster prevention receiver 12 and the optical relay amplifier 20-1 do not duplicately determine the disconnection failure 200.

Therefore, as shown by the broken line arrow in FIG. 18, the termination device 22 transmits the test signal received from the regular optical line 14-1 to the regular optical line 14-1 in response to the disconnection failure 200 of the spare optical line 14-2. The optical relay amplifier 20-2 transmits and relays the test signal received from the downlink side of the regular optical line 14-1 to the upstream side of the spare optical line 14-2 to bypass the disconnection point, and the regular optical line 14 The disconnection monitoring is continued by circulating the test signal from -1 to the spare optical line 14-2.

(Interruption of spare optical line between optical relay amplifiers)
FIG. 19 is an explanatory diagram showing bypass transmission of the test signal when the spare optical line between the disaster prevention receiver and the optical relay amplifier is disconnected in the disconnection monitoring in which the test signal is circulated from the regular optical line to the spare optical line. Is.

As shown in FIG. 19, when a disconnection failure 200 occurs in the spare optical line 14-2 between the disaster prevention receiver 12 and the optical relay amplifier 20-1, the disaster prevention receiver 12 located on the upstream side of the disconnection portion the disconnection of the spare optical line 14-2 in the absence of receiving the test signal from the lower Ri side of the protection optical line 14-2 within a predetermined waiting time Tw1 from the transmission of the test signal to the common optical line 14-1 Judging, the optical relay amplifier 20-1 adjacent to the downlink side is instructed to transmit the test signal via the regular optical line 14-1, and the spare optical line 14 between the optical relay amplifier 20-1 and the adjacent optical relay amplifier 20-1 is instructed. determining disconnection fault 200 -2 informed.

As shown by the dashed arrows in this order 19, to break fault 200 of spare optical line 14-2, the test signal optical amplifier repeater 20-1 received from Ri side under the protection Optical Line 14-2 By relaying to the upstream side of the regular optical line 14-1, the disconnection point is bypassed, and the disconnection monitoring is continued by circulating the test signal from the regular optical line 14-1 to the spare optical line 14-2.

[Monitoring the disconnection of the spare optical line by turning back the test signal]
FIG. 20 shows bypass transmission of the test signal when the spare optical line between the optical relay amplifiers is disconnected in the disconnection monitoring in which the test signal is circulated from the regular optical line to the spare optical line in the optical relay amplifier unit and the termination device unit. It is explanatory drawing which showed.

In the embodiment of FIG. 20, under the normal state, the disaster prevention receiver 12 periodically transmits a test signal for disconnection monitoring to the regular optical line 14-1, and the optical relay amplifiers 20-1 and 20-2. When the termination device 22 receives the test signal from the upstream side of the regular optical line 14-1, the terminal device 22 folds back the test signal and relays the test signal to the upstream side of the spare optical line 14-2, thereby relaying the test signal to the optical relay amplifier 20-. The disconnection is monitored by circulating a test signal from the regular optical line 14-1 to the spare optical line 14-2 in each unit of 1, 20-2 and the terminating device 22.

As shown in FIG. 20, when a disconnection failure 200 occurs in the spare optical line 14-2 between the optical relay amplifiers 20-1 and 20-2, the optical relay amplifier 20-1 located on the upstream side of the disconnection point. There is not received test signal from the bottom Ri side of the protection optical line 14-2 also the elapsed time reaches the waiting time Tw2 of from the transmission of the test signal on the normal optical line 14-1, thereby the down side Judge the disconnection of the spare optical line 14-2.

The control when the optical relay amplifier 20-1 determines the disconnection failure of the spare optical line 14-2 is the same as in the case of FIG. 17, and the terminal device 22 adjacent to the downlink side is routed via the regular optical line 14-1. In addition to instructing the transmission of the test signal, the disaster prevention receiver 12 is disconnected from the spare optical line 14-2 via the spare optical line 14-2, indicating a disconnection failure 200. A failure signal is transmitted to notify the user.

Further, in FIG. 20, the optical relay amplifier 20-2 determines the disconnection failure of the spare optical line 14-2 between the optical relay amplifier 20-2 and the terminal device 22, and the same control as shown in FIG. 18 is performed. ..

Further, in FIG. 20, the disaster prevention receiving board 12 determines the disconnection failure of the spare optical line 14-2 between the disaster prevention receiving board 12 and the optical relay amplifier 20-1, and the same control as shown in FIG. 19 is performed.

[Modification of the present invention]
(OLT and ONU)
In the above embodiment, the disaster prevention receiving board 12 and the optical converter 18 on the equipment side are provided with the functions of the optical transmission / reception units 50 and 62, but the optical conversion unit 50 of the disaster prevention receiving board 12 is used for optical communication. The used OLT (Optical Line Thermal) may be used, and ONU (Optical Network Unit) known as an optical network unit may be used as the optical transmission / reception unit 62 on the equipment side.

(Gateway device)
In the above embodiment, the optical converter 18 and the termination device 22 on the equipment side are provided with the functions of the gateways 66 and 92, but as the gateways 66 and 92, a commercially available gateway device may be used.

(Equipment)
In the above embodiment, as the equipment monitored and controlled by the optical line, a red indicator lamp, a transmitter, a response lamp and a fire hydrant switch provided in the fire detector and the fire hydrant device are taken as an example, but other emergency use The same applies to the equipment of equipment.

(Non-IP)
In the above embodiment, the disaster prevention receiver and the equipment are provided by setting the IP address in the transmission part of the equipment such as the red indicator lamp, the transmitter, the response lamp and the fire hydrant switch provided in the fire detector and the fire hydrant device. Transmission control is performed according to the IP protocol via an optical line with, but is not limited to this. For example, an address other than the IP address may be set in the terminal device, and transmission control may be performed via an optical line using a predetermined communication protocol, for example, a fire transmission protocol used in an R-type fire alarm system.

(others)
In addition, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Tunnel 12: Disaster prevention receiver 14-1: Regular optical line 14-2: Spare optical line 15: Optical distributor 16: Power supply line 18: Optical converter 20, 20-1, 20-2: Optical relay amplifier 22: Termination device 24: Fire extinguisher device 25: Fire detector 46: Panel control unit 48: Transmission unit 50, 62 : Optical transmission / reception unit 66, 98, 154: Gateway 68: LAN line 70, 72: Controller 74: Red display Light 76: Transmitter 78: Response lamp 80: Fire extinguisher switch 82: Terminal control unit 84: LAN transmission unit 86: Drive circuit unit 88: Input circuit unit 90: Regular relay amplification unit 92: Spare relay amplification unit 94: Bypass Relay amplification unit 96: Relay amplification control unit 152: Termination control unit 180: Disconnection failure 190: Light intensity reduction failure

Claims (10)

A predetermined equipment arranged in the tunnel,
A disaster prevention receiver that monitors the equipment
The regular optical line pulled out from the disaster prevention receiver into the tunnel,
A spare optical line pulled out from the disaster prevention receiver into the tunnel,
An optical repeater amplifier connected to the middle the lines of the conventional optical line and the spare optical line,
A termination device connected to each line end of the conventional optical line and the spare optical line,
Equipped with a,
The equipment is connected to the regular optical line and
Said optical repeater amplifier,
Normal state, each of the optical signal relay and amplification between between upstream side and downstream side of the conventional optical line and the up side and the down side of the spare optical line,
When a disconnection failure on the upstream side of the regular optical line is detected, a disconnection failure signal is transmitted to the disaster prevention receiver or another optical relay amplifier adjacent to the upstream side via the spare optical line to perform the backup. together to transmit and receive optical signals through an optical line, the optical signal to a backhaul between the upstream side and downstream side of the upstream side to the conventional optical line of the spare optical line,
When receiving the disconnection fault signal from the other optical amplifier repeater or the terminating device located downstream side, The rewritable relaying optical signals between the upstream side and the downstream side of the conventional optical line, the conventional optical line the optical signal bypasses relay between uplink side and downlink side of the spare optical line,
The disaster prevention receiving board is,
In normal times , optical signals are transmitted and received via the regular optical line.
If from the optical amplifier repeater adjacent the downstream side has received the disconnection fault signal, in addition to the conventional optical line, and receives an optical signal by the spare optical line,
The termination device, when detecting a disconnection failure of the conventional optical line, the light by the spare optical line transmits a disconnection fault signal via the spare optical line in the optical amplifier repeater adjacent the upstream side together to transmit and receive signals, you backhaul optical signals between said spare optical line and the conventional optical line,
The tunnel emergency equipment is characterized by this.
In the tunnel emergency equipment according to claim 1,
The disaster prevention receiving board sends periodically test signal to said common optical line,
Said optical relay amplifier and the terminator, the disaster when the test signal from the receiving board is interrupted, the conventional optical line disconnection fault tunnel emergency equipment and detecting a.
A predetermined equipment arranged in the tunnel,
A disaster prevention receiver that monitors the equipment
The regular optical line pulled out from the disaster prevention receiver into the tunnel,
A spare optical line pulled out from the disaster prevention receiver into the tunnel and connected to the equipment.
An optical repeater amplifier connected to the middle the lines of the conventional optical line and the spare optical line,
A termination device connected to each line end of the conventional optical line and the spare optical line,
Equipped with a,
The equipment is connected to the regular optical line and
Said optical repeater amplifier,
Normal state, each of the optical signal relay and amplification between between upstream side and downstream side of the conventional optical line and the up side and the down side of the spare optical line,
When the intensity reduction failure of the optical signal received from the uplink side of the regular optical line is detected, the light intensity reduction failure is caused to the disaster prevention receiver or another optical relay amplifier adjacent to the uplink side via the spare optical line. The signal is transmitted to stop the transmission and reception of the optical signal by the regular optical line, the optical signal is transmitted and received by the spare optical line, and the upstream side of the spare optical line and the upstream and downstream sides of the regular optical line are transmitted. Bypass the optical signal to and from
Wherein the other optical amplifier repeater or the terminator located downstream side when receiving the light intensity decreases fault signal, The rewritable stop sending and receiving optical signals by the conventional optical line, an upstream side of the conventional optical line the optical signal was backhaul between the downstream side of the spare optical line,
The disaster prevention receiving board is,
In normal times , optical signals are transmitted and received via the regular optical line.
If from the optical amplifier repeater adjacent the downstream side receiving the light intensity decreases fault signal stops the transmission and reception of the optical signal by the conventional optical line, and receives an optical signal by the spare optical line,
The termination device, when detecting an intensity decrease failure of the optical signal received from the common optical line transmits light intensity decreases fault signal via the optical line spare to the optical amplifier repeater adjacent the upstream side stops the transmission and reception of the optical signal by the conventional optical line Te, you backhaul optical signals between said spare optical line and the conventional optical line,
The tunnel emergency equipment is characterized by this.
In the tunnel emergency equipment according to claim 3,
The disaster prevention receiving board sends periodically test signal to said common optical line,
It said optical relay amplifier and the terminator, wherein when the reception level of the test signal falls below a predetermined threshold, the optical signal tunnel emergency equipment and detecting a decrease in strength failure.
In the tunnel emergency equipment according to claim 1,
The disaster prevention receiving board sends periodically test signal to said common optical line,
Said optical amplifier repeater, when receiving the test signal from the uplink side of the conventional optical line, the test signal is relayed to the downstream side of the conventional optical line, the test signal from the down side of the spare optical line when receiving, the test signal is relayed to the upstream side of the preliminary light lines,
The termination device, when receiving the test signal from the common optical line, tunneling equipment emergency, characterized by transmitting said test signal to said spare optical line.
In the tunnel emergency equipment according to claim 5 ,
Said optical repeater amplifiers, wherein, when receiving the test signal from the uplink side of the conventional optical line, together with relaying the test signal on the down side of the conventional optical line, the upstream side of the spare optical line test An emergency tunnel facility that wraps and relays signals.
In the tunnel emergency equipment according to claim 6,
The disaster prevention receiving plate, said when the test signal from the spare optical line from the transmission within a predetermined waiting time without receiving the test signals, to determine the disconnection of the standby optical line, the down side instructs the transmission via the said common optical line adjacent to said optical repeater amplifier said test signal, that you notifying disconnection of said standby optical line between the optical line amplifier adjacent to the downstream side Characterized tunnel emergency equipment.
In the tunnel emergency equipment according to claim 6,
Said optical repeater amplifier, wherein when there is no reception of the common optical line the test signal from the down side of the spare optical line from the transmission of the test signal on the down side within a predetermined waiting time, the down side The disconnection of the spare optical line is determined, and another optical relay amplifier adjacent to the downlink side or the termination device adjacent to the downlink side is instructed to transmit the test signal via the regular optical line, and the uplink side is instructed. The spare optical line between the disaster prevention receiver and the optical relay amplifier adjacent to the downlink side is disconnected or the spare optical line is connected to the termination device adjacent to the downlink side via the spare optical line. A tunnel emergency facility characterized by transmitting a disconnection failure signal indicating a disconnection of an optical line to notify the user.
In the tunnel emergency equipment according to claim 7 or 8.
The tunnel emergency equipment, characterized in that the waiting time is set to be sequentially long from the terminal device toward the disaster prevention receiving panel.
In the tunnel emergency equipment according to claim 1 or 3.
It is branched and connected to the conventional optical line, connected to the equipment by a signal line, converts an optical signal received from the ordinary optical line into an electric signal, outputs it to the equipment, and inputs from the equipment. A tunnel emergency facility provided with an optical converter that converts the generated electric signal into an optical signal and transmits it to the conventional optical line.

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