JP7361835B2 - emergency equipment - Google Patents

Description

The present invention relates to emergency equipment that monitors abnormalities in a tunnel by connecting equipment such as a fire detector and a fire hydrant installed in a tunnel to a disaster prevention receiving board of a monitoring center via an optical line.

Conventionally, emergency equipment has been installed in tunnels such as motorways to protect people and vehicles from fire accidents that occur inside the tunnel.

Such emergency equipment includes fire detectors, manual notification devices, and emergency telephones to monitor and report fires, as well as fire hydrant systems to extinguish fires and prevent the spread of fire. In order to protect against fires, water spray equipment that sprays fire extinguishing water from water spray heads is installed, and emergency equipment equipment is monitored and controlled by connecting it to the transmission line from the disaster prevention receiver installed in the monitoring center. tunnel emergency equipment is being constructed.

Tunnel emergency equipment, which consists of a disaster prevention receiver and equipment, can be broadly divided into R-type transmission system and P-type direct transmission system. The R-type transmission system connects equipment such as fire detectors with addresses set to a transmission line using a signal cable pulled out from a disaster prevention receiver panel, and performs individual management to detect and control each equipment using transmission control. possible. In the P-type direct transmission system, equipment is divided into predetermined sections according to the type of equipment, a plurality of equipment belonging to the same section is connected to a signal line drawn out for each section, and detection and control are performed for each signal line.

Tunnel emergency equipment using the R-type transmission method has various advantages in terms of functionality and management, as detection and control can be performed individually by the equipment, but in general, equipment such as fire detectors is equipped with a transmission control function. Moreover, if the transmission distance becomes long, it is necessary to provide a repeater amplifier board, which increases the cost.

On the other hand, tunnel emergency equipment using the P-type direct transmission method does not require a transmission control function on the fire detector, and there is no need to install a repeater amplifier board even if the transmission distance is long, so the R-type transmission method is used. Although the system configuration is simpler and cheaper than the previous one, it is not possible to perform individual management for detecting and controlling each piece of equipment. Since the equipment is connected to separate dedicated signal lines, the number of wires increases, and if the tunnel length is long, the system configuration cost may increase.

Construct tunnel emergency equipment using the R-type transmission method or the P-type direct transmission method, taking into consideration the advantages and disadvantages of the R-type transmission method and P-type direct transmission method, tunnel length, vehicle traffic volume, etc. I try to do that.

Japanese Patent Application Publication No. 2002-246962 Japanese Patent Application Publication No. 11-128381 Japanese Patent Application Publication No. 2007-257569

By the way, in recent tunnel emergency equipment, equipment is connected to a metal transmission line from which the signal line cable is pulled out from the disaster prevention receiver panel, and the metal transmission line is easily affected by electrical noise. Since the longer the transmission distance, the greater the signal attenuation, we install repeater amplification panels at predetermined distances.Furthermore, if used for a long period of time, the electrical characteristics may deteriorate due to insulation deterioration, causing communication problems. There is sex. Furthermore, in recent years, there has been a trend for tunnels to become longer and longer, exceeding 10 kilometers, making it difficult to respond using metal transmission lines.

In order to solve such problems, it is possible to use optical lines using optical fiber cables as transmission lines for tunnel emergency equipment, but there is no example of using optical lines for tunnel emergency equipment, so it is not possible to use optical lines. The construction of tunnel emergency facilities has emerged as a new challenge.

In addition, when optical lines are used for tunnel emergency equipment, it is possible to maintain a reliable communication connection between the disaster prevention receiving panel and the terminal side in the event of a failure such as a disconnection of the optical line or a drop in the strength of the optical signal. Recovery measures are required.

FIG. 18 is an explanatory diagram showing an outline of an optical transmission system for tunnel emergency equipment that is being studied by the applicant of the present application.

As shown in FIG. 18, for example, ten optical converters 10-1 to 10-10 are installed in the tunnel 11, corresponding to equipment installed in fire hydrant devices installed at intervals of, for example, 50 meters. Optical converters 10-1 to 10-10 are connected in a ring shape by optical lines 14-1 and 14-2 drawn out from a disaster prevention receiver 12 installed at a monitoring center or the like.

That is, the optical line 14-1 drawn out from the disaster prevention receiver panel 12 is connected to the first optical converter 10-1, and then the subsequent optical converters 10-2 to 10-10 are connected by crossing the optical line. They are connected in sequence, and are connected from the optical converter 10-10 located at the end back to the disaster prevention receiving panel 12 via an optical line 14-2.

When connecting the optical line to such optical converters 10-1 to 10-10, the transmission distance of the optical line between the optical converters 10-1 to 10-10 is 50 meters, which corresponds to the fire hydrant installation interval. However, the optical line 14-2 that connects the optical converter 10-10 at the end and the disaster prevention receiving board 12 is connected from the optical converter 10-1 at the entrance of the tunnel 11 to the end of the optical converter 10-10. Since the distance to the optical converter 10-10 is approximately 500 meters, the transmission distance of the optical line 14-2 is a long distance of over 500 meters. The transmission distance of optical lines is quite long.

When the transmission distance of an optical line becomes longer in this way, communication may become impossible depending on the transmission speed. For example, a multi-mode optical fiber cable that supports the maximum communication speed of Ethernet (registered trademark) 1000BASE-LX has a transmission distance of 2 to 550 meters, and there is a problem that communication will not be possible if the maximum transmission distance is exceeded. It is desirable to keep the transmission distance of optical lines as short as possible.

The present invention minimizes the transmission distance of an optical line when connecting a plurality of optical converters installed in a tunnel to a disaster prevention receiving panel in a ring, and uses an optical line that can appropriately cope with increasing tunnel length. The purpose is to provide emergency equipment with a high degree of disability.

(Emergency equipment 1)
The present invention is an emergency facility,
A disaster prevention receiver that transmits and receives optical signals,
a first optical line and a second optical line whose starting ends are connected to a disaster prevention receiver;
a plurality of optical converters that are alternately connected in one or more units to the first optical line or the second optical line and mutually convert optical signals and electrical signals;
equipment connected to each of the plurality of optical converters and transmitting and receiving electrical signals;
a third optical line that connects the first optical line and the second optical line in a ring via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
It is characterized by having the following.

(Emergency equipment 2)
The present invention is an emergency facility,
A disaster prevention receiver that transmits and receives optical signals,
a first optical line and a second optical line whose starting ends are connected to a disaster prevention receiver;
a plurality of optical converters that are sequentially connected to the first optical line or the second optical line at different predetermined intervals and mutually convert optical signals and electrical signals;
equipment connected to each of the plurality of optical converters and transmitting and receiving electrical signals;
a third optical line that connects the first optical line and the second optical line in a ring via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
It is characterized by having the following.

(disconnection monitoring control of disaster prevention receiver panel)
The disaster prevention receiver is
Sending a test signal to the optical converter connected to the first optical line and causing it to return a test response signal, and determining the disconnection and disconnection location of the first optical line when the test response signal is disconnected;
A test signal is transmitted to the optical converter connected to the second optical line, a test response signal is sent back, and when the test response signal is cut off, a break in the second optical line and a break point are determined.

(Emergency equipment 3)
The present invention is an emergency facility,
A disaster prevention receiver that transmits and receives optical signals,
a first optical line and a second optical line whose starting ends are connected to a disaster prevention receiver;
a plurality of optical converters that are sequentially connected to the first optical line or the second optical line and mutually convert optical signals and electrical signals;
equipment connected to each of the plurality of optical converters and transmitting and receiving electrical signals;
a third optical line that connects the first optical line and the second optical line in a ring via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
Equipped with
The disaster prevention receiver is
Sending a test signal to the optical converter connected to the first optical line and causing it to return a test response signal, and determining the disconnection and disconnection location of the first optical line when the test response signal is disconnected;
The feature is that a test signal is sent to the optical converter connected to the second optical line, a test response signal is sent back, and when the test response signal is cut off, the disconnection of the second optical line and the location of the disconnection are determined. shall be.

(Optical line disconnection recovery control)
If the disaster prevention receiver determines that either the first optical line or the second optical line is disconnected and the disconnection location is
The optical converter connected to the same optical line located before the disconnection point continues to send and receive optical signals to the optical line that was determined to be disconnected.
The remaining optical converters connected to the same optical line located behind the disconnection point are switched to transmitting and receiving optical signals to the optical line that has not been determined to be disconnected.

(Disconnection recovery control of terminated optical line)
If the disaster prevention receiver determines that the third optical line is disconnected,
The optical converter connected to the first optical line continues to transmit and receive optical signals to the first optical line,
The optical converter connected to the second optical line continues to transmit and receive optical signals to and from the second optical line.

(basic effect)
The present invention connects a plurality of optical converters provided corresponding to the equipment placed in the tunnel to the optical line drawn out from the disaster prevention receiver into the tunnel, and receives data from the optical line by the optical converter. A tunnel emergency equipment that converts the optical signal input from the equipment into an electrical signal and outputs it to the equipment, and converts the electrical signal input from the equipment into an optical signal and sends it to the optical line, and the plurality of optical converters are: The optical line of the first group is divided into a first group and a second group so as not to exceed a predetermined transmission distance corresponding to a predetermined communication speed caused by the optical line, and the optical line of the first group is connected to the first optical line drawn out from the disaster prevention receiver. The converters are sequentially connected, and the second group of optical converters are sequentially connected to the second optical line drawn out from the disaster prevention receiver, and then the optical converter at the end of the first group and the end of the second group are connected. Since the first optical line and the second optical line are ring-connected through the optical converter, the transmission distance between the disaster prevention receiving board and the optical converter and the interconnection of the optical converters must be set to correspond to the specified communication speed. It is possible to connect using an optical line with a length of no more than 10 kilometers, and even when the tunnel length is longer than 10 kilometers, the transmission distance of the optical line can be minimized to ensure communication quality and reliability.

(Effect of grouping every other optical converter or multiple optical converters)
In addition, since the plurality of optical converters arranged in the longitudinal direction of the tunnel were divided into one or more groups alternately into the first group and the second group, for example, the number of optical converters If the installation spacing is 50 meters and multiple optical converters are alternately divided into the first and second groups, the transmission distance between the optical converters in each group will be 100 meters, which is twice the installation spacing. In addition, the transmission distance between the optical converter located at the head of the group and the disaster prevention receiver panel will not exceed the specified transmission distance corresponding to the specified transmission speed, minimizing the transmission distance of the optical line. This makes it possible to ensure communication quality and reliability.

(Effect of alternating grouping of optical converters into different numbers)
In addition, the plurality of optical converters arranged in the longitudinal direction of the tunnel were divided into the first group and the second group at different predetermined intervals. If the spacing is 50 meters, and the first group is divided into groups of one unit and the second group is divided into two units, the transmission distance between every other optical converter in the second group is is either 50 meters or 100 meters, and the transmission distance between every two optical converters in the first group is 150 meters, none of which exceeds the predetermined transmission distance corresponding to the predetermined transmission speed. It is possible to ensure communication quality and reliability by minimizing the transmission distance of optical lines.

(Effects of communication control of disaster prevention receiver panel)
In addition, the disaster prevention receiver panel selects the first optical line to transmit and receive optical signals to the optical converters of the first group, and selects the second optical line to transmit and receive optical signals to the optical converters of the second group. In order to transmit and receive data, the physical optical line connection to multiple optical converters is a ring connection, but logically there are two systems of communication using bus connections divided into the first group and the second group, and each Communication traffic can be reduced by reducing the number of terminals per system.

(Effects of disconnection monitoring control of disaster prevention receiver panel)
In addition, the disaster prevention receiver panel sequentially designates the first group of optical converters by selecting the first optical line, transmits a test signal, returns a test response signal, and when the test response signal is cut off, the first group of optical converters is sequentially designated. Determine the disconnection and disconnection location of the first optical line, select the second optical line to sequentially designate the optical converters of the second group, transmit a test signal, return a test response signal, and confirm that the test response signal is disconnected. In this case, the disconnection of the second optical line and the location of the disconnection are determined, so that it is possible to reliably monitor the disconnection of the optical line by dividing it into the first group and the second group.

(Effects of optical line disconnection recovery control)
In addition, when the disaster prevention receiver determines that either the first optical line or the second optical line is disconnected and the disconnection location is disconnected, the disaster prevention receiver panel determines that the optical converter in the same group located in front of the disconnection location is disconnected. The selected optical line continues to transmit and receive the selected optical signal, and the remaining optical converters in the same group located behind the disconnection point continue to transmit and receive the selected optical signal using the optical line that has not been determined to be disconnected. For example, even if the first optical line that connects the optical converters of the first group to the bus is disconnected, the remaining optical converters of the first group located behind the disconnection point will be switched. , by disconnection recovery control that switches the second optical line to transmit and receive the selected optical signal, communication with all optical converters belonging to the first group can be continued, and the optical converters of the second group can be connected to the bus Even if the connected second optical line is disconnected, the remaining optical converters in the second group located behind the disconnection point can recover by switching the first optical line to transmit and receive the selected optical signal. Through control, communication with all optical converters belonging to the second group can be continued.

(Effects of disconnection recovery control of the 1st group and 2nd group's terminated optical lines)
In addition, when the disaster prevention receiver determines that the optical line that connects the first optical line and the second optical line in a ring via the optical converter at the end of the first group and the optical converter at the end of the second group is disconnected. , the optical converters in the first group continue to transmit and receive optical signals through the first optical line, and the optical converters in the second group continue to transmit and receive optical signals through the second optical line. Therefore, the optical line connecting the optical converter located at the end of the first group and the second group is not used under normal conditions, and even if this optical line is disconnected, the first group and the second group Since communication with the two groups of optical converters is not affected, it is sufficient to continue communication with each group and take measures to restore the broken optical line by repairing it.

Explanatory diagram showing an overview of tunnel emergency equipment using optical lines A block diagram showing the functional configuration of the embodiment of the disaster prevention receiving panel provided in FIG. A block diagram showing the functional configuration of an embodiment of the optical converter and equipment provided in FIG. 1 A block diagram showing the functional configuration of the embodiment of the controller provided in FIG. 3 Explanatory diagram showing the basic configuration of the optical transmission system used for tunnel emergency equipment Explanatory diagram showing transmission control under normal conditions using an optical transmission system Explanatory diagram showing disconnection monitoring control of the first optical line Explanatory diagram showing disconnection monitoring control of the second optical line Explanatory diagram showing disconnection recovery control when disconnection of the first optical line is determined Explanatory diagram showing disconnection recovery control when disconnection is determined in the second optical line An explanatory diagram showing disconnection recovery control when a disconnection of the optical line connecting the optical converters at the end of the first group and the second group is determined. Explanatory diagram showing disconnection recovery control when disconnection of both the first optical line and the second optical line is determined An explanatory diagram showing an optical transmission system in which an odd number of optical converters are divided into groups alternately. Explanatory diagram showing the transmission system when every two optical converters are divided into the first group and the second group An explanatory diagram showing an optical transmission system when the first group of optical converters is grouped every second, and the remaining optical converters are grouped into the second group. An explanatory diagram showing an optical transmission system when every three optical converters are divided into the first group and the second group. An explanatory diagram showing a duplex optical transmission system in which optical converters are divided into groups alternately. An explanatory diagram showing the outline of the optical transmission system for the tunnel emergency equipment currently under consideration

[Overview of tunnel emergency equipment]
FIG. 1 is an explanatory diagram showing an overview of tunnel emergency equipment using optical lines. As shown in Figure 1, inside the tunnel 11, fire detectors 25 are installed at intervals of 50 meters in the longitudinal direction of the tunnel to detect flames caused by fire. Fire hydrant devices 24 containing attached hoses are installed at intervals of 50 meters.

Furthermore, in addition to the fire detector 25 and the fire hydrant system 24, inside the tunnel 11, a manual notification device and an emergency telephone are installed to report a fire, and to protect the inside of the tunnel frame and ducts from fire. A water sprayer that sprays fire extinguishing water from a water spray head is installed, but is not shown.

In addition, optical converters 10 are arranged in the tunnel 11 in correspondence with fire hydrant devices 24 and fire detectors 25 installed at intervals of 50 meters, and the optical converters 10 are equipped with equipment and devices incorporated in the fire hydrant device 24 and fire detectors 25 installed at intervals of 50 meters. A fire detector 25 is connected.

On the other hand, a disaster prevention receiving board 12 is installed in a monitoring center, etc., and from the disaster prevention receiving board 12, an optical line 14-1 which becomes a first optical line and an optical line 14-2 which becomes a second optical line are connected to the tunnel 11. is pulled out, and a plurality of optical converters 10 installed inside the tunnel 11 are connected in a ring. Note that in the following explanation, when there is no need to distinguish between the optical line 14-1 and the optical line 14-2, they may be referred to as the optical line 14.

Optical fiber cables such as FTTH are used for the optical lines 14-1 and 14-2, and optical wavelength division multiplexing (WDM) using, for example, IP packets is performed. As an example of the physical specifications of the optical fiber cable used for optical lines 14-1 and 14-2, if we take the maximum communication speed of Ethernet (registered trademark) 1000BASE-LX as an example, if the cable type is multimode, the transmission distance is 2. ~550 meters. Note that the optical fiber cables used for the optical lines 14-1 and 14-2 may have appropriate physical specifications as necessary.

In addition, a power line 16 is drawn out from the disaster prevention receiver panel 12 into the tunnel, and supplies power to the equipment installed in the optical converter 10, fire detector 25, and fire hydrant device 24 installed in the tunnel. There is.

In addition, for the disaster prevention reception panel 12, fire pump equipment 26, duct cooling pump equipment 27, ventilation equipment 28, alarm display board equipment 29, radio rebroadcast equipment 30, television monitoring equipment 31, lighting equipment 32, and IG A slave station equipment 33 and the like are provided, and except for the IG slave station equipment 33 which is connected via a data transmission line, the other equipment is individually connected to the disaster prevention receiving board 12 via a P-type signal line.

Here, the ventilation equipment 28 is equipment that generates a ventilation flow in the longitudinal direction of the tunnel by giving energy to the air in the tunnel by using a jet fan installed on the ceiling side of the tunnel at a high blowing wind speed.

The alarm display board equipment 29 is equipment that notifies users of the tunnel of abnormalities within the tunnel by displaying them on an electronic display board. The radio rebroadcast facility 30 is a facility that allows drivers and the like to receive information from a road administrator inside a tunnel. The television monitoring equipment 31 is
This equipment is used to confirm the scale and location of a fire, operate water spray equipment, and grasp the situation inside a tunnel when conducting evacuation guidance.

The lighting equipment 32 is equipment that drives and manages lighting equipment in the tunnel. Further, the IG slave station equipment 33 is a communication equipment that connects the disaster prevention receiving board 12 and a remote monitoring and control equipment 35, which is an externally provided host equipment, via a network 34.

[Functional configuration of equipment]
FIG. 2 is a block diagram showing the functional configuration of an embodiment of the disaster prevention receiving board provided in FIG.

(Disaster prevention receiver)
As shown in FIG. 2, the disaster prevention reception panel 12 includes a panel control section 46, and the panel control section 46 is a function realized by executing a program, for example, and the hardware includes a CPU, memory, various input/output ports, etc. Use computer circuits etc. equipped with

The panel control unit 46 is provided with two systems of transmission units 48 and optical transceivers 50, and an optical line 14-1 is drawn out from one optical transceiver 50 into the tunnel 11, and the other optical transceiver 50 is connected to the optical line 14-1. An optical line 14-2 is drawn out from the tunnel 11 into the tunnel 11.

The panel control section 46 communicates with a display section 52 equipped with a liquid crystal display, a printer, etc., an operation section 54 equipped with various switches, etc., an alarm section 56 equipped with a speaker, an alarm indicator light, etc., and external monitoring equipment. A modem 58 is provided, and the fire pump equipment 26, cooling pump equipment 27, ventilation equipment 28, alarm display board equipment 29, radio rebroadcast equipment 30, television monitoring equipment 31, and lighting equipment 32 shown in FIG. 1 are further connected. An IO unit 60 is provided.

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

The optical transmitter/receiver 50 converts the packet signal from the transmitter 48 into an optical signal in a predetermined downstream wavelength band and transmits it to the optical lines 14-1, 14-2. The optical signal in a predetermined upstream wavelength band received from the optical signal converter 48 is converted into a packet signal (electrical signal) and output to the transmission section 48 .

For example, the optical transmitter/receiver 50 includes an electrical/optical converter (E/O converter) equipped with a laser diode that converts an electrical signal into an optical signal, and an optical/optical converter (E/O converter) equipped with a photodiode that converts an optical signal into an electrical signal. It includes an electrical converter (O/E converter) and a WDM filter that separates optical signals in the upstream wavelength band from the optical line and combines and sends optical signals in the downstream wavelength band to the optical line.

In this embodiment, the transmission unit 48 and the optical transmitting/receiving unit 50 perform, for example, CWDM (coarse WDM) transmission, which is known as optical wavelength division multiplexing communication with a wide wavelength interval.

The panel control unit 46 controls transmission and reception of packet signals via the optical converter 10 to and from equipment installed in the tunnel via the transmission unit 48 and the optical transceiver unit 50 . Details of the control of optical transmission between the board control unit 46 and the optical converter 10 will be explained later.

(light converter)
FIG. 3 is a block diagram showing the functional configuration of an embodiment of the optical converter and equipment provided in FIG. 1.

As shown in FIG. 3, the optical converter 10 is provided with a conversion control section 90, a first gateway 92, a second gateway 94, and a photoelectric conversion circuit section. In the photoelectric conversion circuit section, a first optical transmitter/receiver section 100-1 is provided on the upstream optical line 14 in order to transmit and receive optical signals between the upstream and downstream optical lines 14, and the optical line 14 on the downstream side A second optical transmitter/receiver 100-2 is provided on the line 14.

The first optical transmitter/receiver 100-1 includes a WDM filter 102, an optical/electrical converter (O/E converter) 104 equipped with a photodiode, and an electric/optical converter (E/O converter) equipped with a laser diode. 106. Further, the second optical transmitter/receiver 100-2 includes a WDM filter 108, an optical/electrical converter (O/E converter) 110 equipped with a photodiode, and an electric/optical converter (E/O converter) equipped with a laser diode. 112.

The optical converter 10 uses a WDM filter 102 to extract an optical packet signal in the downstream wavelength band from the optical line 14 on the upstream side, converts it into an electrical packet signal using an optical/electrical converter 104, and outputs the signal to the first gateway 92. .

The first gateway 92 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 first gateway 92 outputs the electrical packet signal received from the optical/electrical converter 104 to the conversion control unit 90, and the conversion control unit 90 outputs the electrical packet signal to the LAN line 62 if it is addressed to the IP address of the equipment connected to itself. Sends LAN packet signals. Further, if the conversion control unit 90 does not correspond to the IP address of the equipment connected to itself, it outputs an electrical packet signal to the second gateway 94. The second gateway 94 outputs the received electrical packet signal to the electrical/optical converter 112 to convert it into an optical packet signal in the downstream wavelength band, and transmits it from the WDM filter 108 to the optical line 14 on the downstream side.

The optical packet signal in the upstream wavelength band from the downstream optical line 14 is separated by the WDM filter 108 and converted into an electrical packet signal by the optical/electrical converter 110, and its IP address is addressed to the disaster prevention receiving board 12. is converted into an optical packet signal in the upstream wavelength band by the electrical/optical converter 106 via the second gateway 94, the control unit 10, and the first gateway 92, and then sent to the optical line 14 on the upstream side via the WDM filter 102. Sent.

In addition, when the conversion control unit 90 receives a LAN packet signal with the destination IP address of the disaster prevention receiver 12 from the equipment side including the fire detector 25 and the fire hydrant device 24 via the LAN line 62, the conversion control unit 90 outputs it to the first gateway 92. The signal is converted into an electrical packet signal of the IP protocol, converted into an optical packet signal of the upstream wavelength band by the electrical/optical converter 106, and transmitted to the optical line 14 on the upstream side via the WDM filter 102.

(Functional configuration of equipment side)
As shown in FIG. 3, the fire detector 25 is directly connected to the LAN line 62 from the conversion control unit 90 of the optical converter 10, and a red indicator light 74 is connected to the fire hydrant device 24 as a control system equipment. and a response lamp 78 are connected via a controller 70, and a transmitter 76 and a fire hydrant switch 80, which are detection system equipment, are connected via another controller 72.

Here, the transmission between the conversion control section 90 of the optical converter 10 and the controllers 70 and 72 provided in the fire detector 25 and the fire hydrant device is performed not only by the LAN protocol but also by the type R fire alarm system. It is also a good fire transmission protocol.

In the case of the fire transmission protocol, the downstream signals from the transmission section of the conversion control section 90 to the transmission sections of the fire detector 25 and controllers 70 and 72 are voltage mode transmissions, and the voltage of the transmission line is changed within a predetermined voltage range. Transmitted as voltage pulses. On the other hand, the upstream signals from the fire detector 25 and the transmission sections of the controllers 70 and 72 to the conversion control section 90 are current mode transmissions, in which a signal current is passed through the transmission path at the timing of bit 1 of the transmission data. The upstream signal is transmitted as a current pulse train.

FIG. 4 is a block diagram showing the functional configuration of an embodiment of the controller provided on the fire hydrant device side in FIG. 3, and FIG. 4(B) shows a controller used for the detection system equipment.

The controller 70 used in the control system equipment shown in FIG. 4A includes a terminal control section 82, a LAN transmission section 84, and a drive circuit section 86. The terminal control unit 82 uses a computer circuit, etc. equipped with a CPU, memory, various input/output ports, and the like.

A unique IP address is set in the LAN transmission unit 84, and if the address of the packet signal received via the LAN line 62 matches the self address, the terminal control unit 82 transmits the control command set in the packet signal. A control signal based on this is output to the drive circuit 86, and control is performed to, for example, blink the red indicator light 74 connected as equipment.

Note that the drive circuit section 86 maintains the red indicator light 74 in a lit state in a normal state. Further, the controller 70 connected to the response lamp 78 shown in FIG. 3 is also the same as that shown in FIG. 4(A).

The controller 72 used in the detection system in FIG. 4(B) includes a terminal control section 82, a LAN transmission section 84, and an input circuit section 88. A unique IP address is set for the LAN transmission section 84. For example, a transmitter 76 is connected to the input circuit section 88 as a facility device, and when the transmitter 76 is turned on by pressing a button, the input circuit section 88 detects the switch on and outputs a fire notification signal. .

When the terminal control unit 82 detects a fire report signal from the input circuit unit 88, it 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 fire report information are set. I do.

Note that it is desirable that the switch used for the transmitter 76 be a non-locking type switch. By using a non-locking switch for the transmitter 76, there is no need for a recovery operation after the switch is operated.

Further, the controller 72 connected to the fire hydrant switch 80 shown in FIG. 3 is also the same as that shown in FIG. 4(B). 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 containing a pump start command for the fire pump equipment is transmitted to the disaster prevention reception panel 12. . Furthermore, a fire pump starting switch (not shown) provided in the fire hydrant device 24 and used by the fire brigade is connected in parallel to the fire hydrant switch 80.

Furthermore, since the fire detector 25 shown in FIG. 3 has a built-in LAN transmission function, there is no need to attach an external controller. Further, in FIG. 4, the controllers 70 and 72 are externally attached to the equipment, but they may be integrated into equipment.

Further, the power for the controllers 70 and 72 shown in FIG. 4 is supplied from the disaster prevention receiving board 12 through the power line 16 as shown in FIG. The controller 72 of the equipment shown in FIG. 4(B), which is turned off, is equipped with a battery power supply, and in the normal state when the switch is off, the controller 72 is operated by the battery power, and the switch cannot be operated in the event of a fire or inspection. When this occurs, the controller 72 is operated by switching to the power source from the disaster prevention receiving board 12, thereby reducing power consumption on the equipment side.

In addition, the terminal control unit 82 equipped with the CPU of the controllers 70 and 72 in FIGS. 4(A) and 4(B) is set to sleep mode in the normal state to save power consumption, and when display control or switch operation is performed. The sleep mode may be canceled by wake-up and the device may be operated in the normal mode.

[Optical transmission system for tunnel emergency equipment]
FIG. 5 is an explanatory diagram showing the basic configuration of an optical transmission system used for tunnel emergency equipment.

As shown in FIG. 5, in this embodiment, ten optical converters 10-1 to 10-10 installed in a tunnel 11 are connected in a ring to a disaster prevention receiving panel 12 by optical lines 14-1 and 14-2. For example, if

In the optical transmission system of this embodiment, the optical converters 10-1 to 10-10 are arranged so as not to exceed a predetermined transmission distance corresponding to a predetermined communication speed, which is determined by the physical specifications of the optical fiber cable used as an optical line. They are divided into a first group G1 and a second group G2. Note that in the following description, when there is no need to distinguish between the optical converters 10-1 to 10-10, they may be referred to as the optical converters 10.

For example, the optical converters 10-1 to 10-10 are alternately divided into a first group G1 and a second group G2, and the first group G1 includes optical converters 10-1, 10-3, 10-10. , 10-7, and 10-9, and the second group G2 is composed of optical converters 10-2, 10-4, 10-6, 10-8, and 10-10. In addition, in FIG. 5, the optical converters 10 of the first group G1 are shown by hatching.

Corresponding to this grouping, five optical converters 10-1, 0-3, 10-5, 10-7, and 10-9 of the first group G1 are connected to the optical line 14-1 drawn out from the disaster prevention receiving board 12. are successively connected, and the optical converters 10-2, 10-4, 10-6, 10-8, and 10-10 of the second group G2 are connected to the optical line 14-2 drawn out from the disaster prevention receiver panel 12. Five units are connected sequentially.

Further, the optical converter 10-9 at the end of the first group G1 and the adjacent optical converter 10-10 at the end of the second group G2 are connected by an optical line, thereby transmitting optical signals to the disaster prevention receiving panel 12. Converters 10-1 to 10-10 are physically connected in a ring.

Here, the distance between each of the optical converters 10-1 to 10-10 is a transmission distance of 50 meters, which corresponds to the installation interval of the fire hydrant device 24 and the fire detector 25. are alternately divided into a first group G1 and a second group G2, the transmission distance of adjacent optical converters in each group G1, G2 is, for example, the transmission distance of adjacent optical converters 10-1, 10-1, In the case of 10-3, the distance is 100 meters, and for example, in the case of the adjacent optical converters 10-2 and 10-4 of the second group G2, the distance is also 100 meters. Furthermore, if the transmission distance of the optical lines 14-1 and 14-2 from the disaster prevention receiver panel 12 to the optical converters 10-1 and 10-2 of the groups G1 and G2 closest to each other in the tunnel 11 is about 100 meters, for example, It is enough.

For this reason, the optical converters 10-1 to 10-10 and the disaster prevention receiver panel 12 will transmit optical signals using optical lines using optical fiber cables with a maximum transmission distance of approximately 100 meters, and will correspond to the communication speed. Since the transmission distance is within the maximum transmission distance of optical fiber cables, for example 550 meters, it reliably prevents communications from becoming impossible due to longer transmission distances due to longer tunnels, and improves the communication quality and reliability of optical transmission. be able to.

[Optical transmission control during normal monitoring]
FIG. 6 is an explanatory diagram showing transmission control in a normal state by an optical transmission system, and shows optical converters 10-1 and 10-9 at the beginning and end of the first group G1 and the second group in the basic configuration of FIG. The optical converters 10-2 and 10-10 at the beginning and end of G2 are shown.

Normal monitoring of optical lines 14-1 and 14-2, which are ring-connected by dividing optical converters 10-1 to 10-10 into first and second groups G1 and G2, to the disaster prevention receiver panel 12 and that there is no disconnection failure. Inside, the panel control unit 46 of the disaster prevention receiving panel 12 shown in FIG. The optical line 14-1 is selected to transmit and receive optical packet signals as shown in FIG. , as in route B, selects the optical line 14-2 and controls the transmission and reception of optical packet signals.

As a result, the optical converters 10-1 to 10-10 are physically connected in a ring to the disaster prevention receiving panel 12, but the optical converters 10-1 to 10-10 belonging to the first group G1 are connected to the optical line 14-1. An optical signal is sent specifying the IP address of 120-9, and the IP addresses of optical converters 10-2, . . . , 10-10 belonging to the second group G2 are specified for the optical line 14-2. Since the optical packet signal is transmitted between the optical converters 10-9 and 10-10 located at the end of each group G1 and G2, the optical -9 and the optical converter 10-10 are separated from each other.

Therefore, during normal monitoring, the optical converters 10-1 to 10-9 and the optical converters 10-2 to 10-10 of each group G1 and G2 are connected to the disaster prevention receiving board 12 via optical lines 14-1 and 14-2. The system is connected to a bus, and independent optical packet signals are sent and received using two optical transmission systems, and the communication traffic for each transmission system is approximately halved compared to when transmission is logically performed using a ring connection. This can improve the communication quality and reliability of optical transmission systems.

[Optical transmission system disconnection monitoring control]
(Disconnection monitoring control of optical line 14-1)
FIG. 7 is an explanatory diagram showing disconnection monitoring control of the first optical line. The panel control unit 46 of the disaster prevention receiving panel 12 shown in FIG. By specifying IP addresses 5, 10-7, and 10-9 in sequence, optical packet test signals are sent periodically, and optical packet test response signals are returned as shown in route A2. When the optical packet test response signal is disconnected, control is performed to determine the disconnection and disconnection location of the optical line 14-1, which is the first optical line, and to issue a disconnection alarm.

Furthermore, in order to monitor disconnection of the optical line connecting the optical converters 10-9 and 10-10 at the end of the first group G1 and the second group G2, the panel control unit 46 controls the optical line of the first group G1. Following the transmission of the optical packet test signal specifying the IP addresses of the converters 10-1, 10-3, 10-5, 10-7, and 10-9, the optical converter 10 located at the end of the second group G2 An optical packet test signal specifying the IP address of -10 is transmitted, and an optical packet test response signal is sent back from the optical converter 10-10.

When the optical converter 10-10 at the end of the second group G2 receives an optical packet test signal specifying its own IP address from the upstream optical line, it transmits an optical packet response signal in response to the optical packet test signal to the upstream optical line. Let them reply. Specifically, when the conversion control unit 90 of the optical converter 10 shown in FIG. Control is performed so that an optical packet test response signal specifying the IP address of is sent back from the first optical transmitting/receiving section 100-1 to the optical line 14 on the upstream side.

Note that the panel control unit 46 issues a disconnection alarm and performs disconnection recovery control, which will be explained later.

(Disconnection monitoring control of optical line 14-2)
FIG. 8 is an explanatory diagram showing disconnection monitoring control of the second optical line. The panel control unit 46 of the disaster prevention receiving panel 12 shown in FIG. The optical packet test signal is sent periodically by specifying the , determines the disconnection and disconnection location of the optical line 14-2, which is the second optical line, and performs control to issue a disconnection alarm.

Note that the disconnection monitoring of the optical line connecting the optical converters 10-9 and 10-10 at the end of the first group G1 and the second group G2 is not based on the disconnection monitoring on the first group G1 side described above. Following the transmission of the optical packet test signal specifying the IP address of the optical converters 10-2, 10-4, 10-6, 10-8, 10-10 of the second group G2, the terminal of the first group G1 An optical packet test signal specifying the IP address of the located optical converter 10-9 may be transmitted, and an optical packet test response signal may be sent back.

[Optical transmission system disconnection recovery control]
(Disconnection recovery control of first optical line)
FIG. 9 is an explanatory diagram showing disconnection recovery control when disconnection of the first optical line is determined. As shown in FIG. 9, when the panel control unit 46 of the disaster prevention reception panel 12 shown in FIG. Performs disconnection recovery control corresponding to 120.

Discrimination of the disconnection location 120 by the panel control unit 46 indicates that the disconnection has occurred between the optical converter 10-1 and the adjacent optical converter 10-3 (not shown) of the same first group G1. Then, the optical packet test response signal from the optical converter 10-1 is received, but the optical packet test response signals from the optical converters 10-3, 10-5, 10-7, and 10-9 are not received. Based on this, it can be determined that the disconnection point 120 is between the optical converter 10-1 and the optical converter 10-3.

When the panel control unit 46 determines the disconnection point 120 between the optical converter 10-1 and the optical converter 10-3, the panel control unit 46 controls the optical converter 10-1 of the first group G1 located in front of the disconnection point 120. In this case, the transmission and reception of the optical packet signal indicated by the same route A as during normal monitoring is continued, but the remaining optical converters 10-3, 10-5, 10-7 of the first group G1 located behind the disconnection point 120 , 10-9, the optical line 14-2 is selected, and as shown in route B, the photodetectors 10-2, 10-4, 10-6, 10-8, 10 of the second group G2 are connected. Following the IP address of -10, the IP addresses of the optical converters 10-9, 10-7, 10-5, and 10-3 of the first group G1 connected behind the disconnection point 120 are sequentially specified. Controls switching between transmitting and receiving packet signals. This disconnection recovery control is a control that switches a logical bus connection that is normally monitored to a logical ring connection.

(Second optical line disconnection recovery control)
FIG. 10 is an explanatory diagram showing disconnection recovery control when disconnection of the second optical line is determined. As shown in FIG. 10, when determining that the second optical line 14-2 is disconnected, the panel control unit 46 of the disaster prevention reception panel 12 shown in FIG. Performs disconnection recovery control.

Discrimination of the disconnection location 120 by the panel control unit 46 indicates that the disconnection has occurred between the optical converter 10-2 of the second group G2 and the adjacent optical converter 10-4 of the same second group G2. Then, the optical packet test response signal from the optical converter 10-2 is received, but the optical packet test response signals from the optical converters 10-4, 10-6, 10-8, and 10-10 are no longer received. Based on this, it can be determined that the disconnection point 120 is between the optical converter 10-2 and the optical converter 10-4.

When the panel control unit 46 determines the disconnection point 120 between the optical converter 10-2 and the optical converter 10-4, the panel control unit 46 controls the optical converter 10-2 of the second group G2 located before the disconnection point 120. In this case, the transmission and reception of the same optical packet signals as during normal monitoring shown in route B are continued, but the remaining optical converters 10-4, 10-6, and 10-8 of the second group G2 located behind the disconnection point 120 , 10-10, the first optical line 14-1 is selected, and as shown in route A, the optical converters 10-1, 10-3, 10-5, 10-7 of the second group G1 are connected. , 10-9, and then sequentially specify the IP addresses of the optical converters 10-10, 10-8, 10-6, and 10-4 of the second group G2 connected to the rear of the disconnection point 120. Controls switching between transmission and reception of optical packet signals.

(Disconnection recovery control of the 1st group and 2nd group's terminated optical lines)
FIG. 11 is an explanatory diagram showing disconnection recovery control when it is determined that the optical line connecting the terminal optical converters of the first group and the second group is disconnected.

The panel control unit 46 of the disaster prevention receiving panel 12 shown in FIG. 2 connects across the optical converters 10-9 and 10-10 arranged at the ends of each group G1 and G2, as shown in FIG. When a disconnection point 120 due to a disconnection of the optical line is determined, the optical line 14-1 is selected as the route for the optical converters 10-1 to 10-9 of the first group G1, as in normal monitoring. The transmission and reception of the optical packet signal indicated by A is continued, and the transmission and reception of the optical packet signal indicated by route B, in which the optical line 14-2 is selected, is continued for the optical converters 10-2 to 10-10 of the second group G2. control.

Such a disconnection of the optical line between the optical converters 10-9 and 10-10 placed at the end of each group G1 and G2 is caused by the physical disconnection of the optical line 14-1 and 14-2 to the disaster prevention receiving board 12. This system changes a ring connection to a physical bus connection, and since the disaster prevention reception panel 12 logically controls optical transmission using a bus connection, even if the physical bus connection is changed due to a disconnection. , it is sufficient to simply continue the logical bus connection, and no special disconnection recovery control is required.

(Disconnection between the first optical line and the second optical line)
FIG. 12 is an explanatory diagram showing disconnection recovery control when it is determined that both the first optical line and the second optical line are disconnected.

As shown in FIG. 12, if both the optical line 14-1, which is the first optical line, and the optical line 14-2, which is the second optical line, are disconnected at the same disconnection point 120, optical transmission is logically Even if the bus connection is switched to the ring connection, the first group of optical converters 10-3, . . . 10-9 and the second group G2 of optical converters 10-4, .・Communication with 10-10 is not possible, and measures such as construction work are required to promptly restore the disconnection point 120.

[Grouping of optical converters]
There are various forms of grouping in order to shorten the transmission distance between optical converters in the optical transmission system used in the tunnel emergency equipment shown in Fig. 1, in addition to those shown in Fig. 5. It will look like this:

(Grouping of odd number of optical converters)
FIG. 13 is an explanatory diagram showing an optical transmission system in which an odd number of optical converters are alternately divided into groups.

As shown in FIG. 13, in this embodiment, nine odd-numbered optical converters 10-1 to 10-9 installed in the tunnel 11 are alternately divided into a first group G1 and a second group G2. The first group G1 is composed of five optical converters 10-1, 10-3, 10-5, 10-7, and 10-9, and the second group G2 is composed of optical converters 10-2, 10-2, and 10-9. It consists of four units: 10-4, 10-6, and 10-8.

Corresponding to this grouping, the optical converters 10-1, 10-3, 10-5, 10-7, 10-9 of the first group G1 are sequentially connected to the optical line 14-1 drawn out from the disaster prevention receiving panel 12. Further, the optical converters 10-2, 10-4, 10-6, and 10-8 of the second group G2 are sequentially connected to the optical line 14-2 drawn out from the disaster prevention receiver panel 12. Furthermore, the optical converter 10-9 at the end of the first group G1 and the adjacent optical converter 10-8 at the end of the second group G2 are connected by an optical line, thereby transmitting optical signals to the disaster prevention receiving panel 12. Converters 10-1 to 10-9 are physically connected in a ring.

In this way, an odd number of optical converters 10-1 to 10-9 are alternately divided into the first group G1 and the second group G2, and connected to the disaster prevention reception panel 12 using optical lines 14-1 and 14-2. In this case, the transmission distance between adjacent optical converters in each group G1 and G2 is 100 meters as in the case of an even number of units in Figure 5, and the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, within 550 meters. , it is possible to reliably prevent communication from becoming impossible due to an increase in transmission distance, and improve the communication quality and reliability of optical transmission.

(Group of every two optical converters)
FIG. 14 is an explanatory diagram showing a transmission system in which every two optical converters are divided into a first group and a second group.

As shown in FIG. 14, in this embodiment, the ten optical converters 10-1 to 10-10 installed in the tunnel 11 are alternately grouped into a first group G1 and a second group G2. The first group G1 consists of six optical converters 10-1, 10-2, 10-5, 10-6, 10-9, and 10-10, and the second group G2 consists of optical converters 10-1, 10-2, 10-5, 10-6, 10-9, 10-10. It consists of four units: 10-3, 10-4, 10-7, and 10-8.

Corresponding to this grouping, the optical line 14-1 drawn out from the disaster prevention receiving panel 12 is connected to the optical converters 10-1, 10-2, 10-5, 10-6, 10-9, 10- of the first group G1. The optical converters 10-3, 10-4, 10-7, and 10-8 of the second group G2 are sequentially connected to the optical line 14-2 drawn out from the disaster prevention receiving panel 12. be done. Furthermore, the optical converter 10-10 at the end of the first group G1 and the optical converter 10-8 at the end of the second group G2 are connected by an optical line, so that the optical converter 10-10 at the end of the first group G1 is connected to the optical converter 10-10 at the end of the first group G1. 1 to 10-10 are physically connected in a ring.

In this way, when the optical converters 10-1 to 10-10 are divided into groups every two units and connected to the disaster prevention reception panel 12 using the optical lines 14-1 and 14-2, the adjacent The transmission distance of such an optical converter is 50 meters or 150 meters.

In the case of the first group G1, for example, the transmission distance between the optical converters 10-1 and 10-2 is 50 meters, and the transmission distance between the optical converters 10-2 and 10-5 is 150 meters. Further, in the case of the second group G2, for example, the transmission distance between the optical converters 10-3 and 10-4 is 50 meters, and the transmission distance between the optical converters 10-4 and 10-7 is 150 meters.

Therefore, the maximum transmission distance of the optical line in the optical converters 10-1 to 10-10 installed in the tunnel 11 is 150 meters, which is within the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, 550 meters. Therefore, it is possible to reliably prevent communication from becoming impossible due to a long transmission distance, and to improve the communication quality and reliability of optical transmission.

(Grouping with different optical converter units for each group)
FIG. 15 is an explanatory diagram showing an optical transmission system in which the first group of optical converters is grouped into every second group, and the remaining optical converters are grouped into a second group.

As shown in FIG. 15, in this embodiment, of the ten optical converters 10-1 to 10-10 installed in the tunnel 11, every second optical converter is assigned to the first group G1, and the rest are assigned to the second group G1. The first group G1 consists of four optical converters 10-1, 10-4, 10-7, and 10-10, and the second group G2 consists of optical converters 10-1, 10-4, 10-7, and 10-10. It consists of six units: 10-2, 10-3, 10-5, 10-6, 10-8, and 10-9.

Corresponding to this grouping, the optical converters 10-1, 10-4, 10-7, and 10-10 of the first group G1 are sequentially connected to the optical line 14-1 drawn out from the disaster prevention receiving panel 12, and , the optical converters 10-2, 10-3, 10-5, 10-610-8, and 10-9 of the second group G2 are successively connected to the optical line 14-2 drawn out from the disaster prevention receiving panel 12. . Further, the optical converter 10-10 at the end of the first group G1 and the optical converter 10-9 at the end of the second group G2 are cross-connected by an optical line. 1 to 10-10 are physically connected in a ring.

In this way, when the optical converters 10-1 to 10-10 are divided into groups and connected to the disaster prevention reception panel 12 using the optical lines 14-1 and 14-2, the adjacent optical converters in the first group G1 The transmission distance will be 150 meters, and the transmission distance of adjacent optical converters in the second group G2 will be 50 meters or 100 meters.

Therefore, the maximum transmission distance of the optical line in the optical converters 10-1 to 10-10 installed in the tunnel 11 is 150 meters, which is within the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, 550 meters. Therefore, it is possible to reliably prevent communication from becoming impossible due to a long transmission distance, and to improve the communication quality and reliability of optical transmission.

(Group of every three optical converters)
FIG. 16 is an explanatory diagram showing an optical transmission system in which every three optical converters are divided into a first group and a second group.

As shown in FIG. 16, in this embodiment, ten optical converters 10-1 to 10-10 installed in a tunnel 11 are alternately grouped into a first group G1 and a second group G2 every three units. The first group G1 consists of six optical converters 10-1, 10-2, 10-3, 10-7, 10-8, and 10-9, and the second group G2 consists of optical converters 10-1, 10-2, 10-3, 10-7, 10-8, and 10-9. It consists of four units: 10-4, 10-5, 10-6, and 10-10.

Corresponding to this grouping, the optical line 14-1 drawn out from the disaster prevention receiving panel 12 is connected to the optical converters 10-1, 10-2, 10-3, 10-7, 10-8, 10- of the first group G1. 9 are connected in sequence, and the optical converters 10-4, 10-5, 10-6, and 10-10 of the second group G2 are connected to the optical line 14-2 drawn out from the disaster prevention receiver panel 12. Four units are connected sequentially. Further, the optical converter 10-9 at the end of the first group G1 and the optical converter 10-10 at the end of the second group G2 are cross-connected by an optical line. 1 to 10-10 are physically connected in a ring.

In this way, when the optical converters 10-1 to 10-10 are alternately divided into groups every three units and connected to the disaster prevention reception panel 12 by the optical lines 14-1 and 14-2, each group G1 and G2 The transmission distance of adjacent optical converters in 1 is 50 meters or 200 meters.

Therefore, the maximum transmission distance of the optical line in the optical converters 10-1 to 10-10 installed in the tunnel 11 is 200 meters, which is within the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, 550 meters. Therefore, it is possible to reliably prevent communication from becoming impossible due to a long transmission distance, and to improve the communication quality and reliability of optical transmission.

[Duplication of optical lines]
FIG. 17 is an explanatory diagram showing a duplex optical transmission system in which optical converters are divided into groups alternately.

As shown in FIG. 17, common optical lines 14-11 and 14-21 are pulled out from the disaster prevention receiver panel 12 for the optical converters 10-1 to 10-10 installed in the tunnel 11, and one In addition, backup optical lines 14-12 and 14-22 are drawn out from the disaster prevention receiving board 12, and similarly, they are connected alternately to every other unit.

The optical converters 10-1 to 10-10 connect the first optical transceiver 100-1 and the second optical transceiver 100-2 shown in FIG. 3 to the common optical lines 14-11 and 14-21, and further , a third optical transmitting/receiving section and a fourth optical transmitting/receiving section having the same configuration are provided, and are connected to the conversion control section 90 via a separately provided third gateway and a fourth gateway, thereby making it redundant.

During normal monitoring, the disaster prevention receiver 12 selects the optical lines 14-11 and 14-21 for normal use and sends and receives optical signals divided into the first group and the second group, as shown in FIG. Disconnection in which when both regular optical lines 14-11 and 14-21 are disconnected, the selection is switched to protection optical lines 14-12 and 14-22, and optical signals are transmitted and received by dividing them into the first group and the second group. Recovery control can be performed.

[Modification of the present invention]
(OLT and ONU)
In the above embodiment, the disaster prevention receiving panel 12 and the optical converter 10 on the equipment side are provided with the functions of the optical transmitting/receiving sections 50, 100-1200-2, but the optical converter 10 of the disaster prevention receiving panel 12 is , an OLT (Optical Line Terminal) used in optical communication is used, and an ONU (Optical Network Unit) known as an optical line terminal device is used as the optical transceiver section 100-1200-2 on the optical converter 10 side. May be used.

(Gateway device)
In the above embodiment, the optical converter 10 is provided with a gateway function, but a commercially available gateway device may be used as the gateway.

(Equipment)
In the above embodiment, fire detectors, red indicator lights, transmitters, response lamps, and fire hydrant switches installed in fire hydrant equipment are used as examples of equipment monitored and controlled by optical lines, but other emergency The same applies to the equipment of the facility.

(Non-IP)
In the above embodiment, by setting an IP address in the transmission section of equipment such as a red indicator light, a transmitter, a response lamp, and a fire hydrant switch provided in a fire detector and fire hydrant device, the disaster prevention receiving board and equipment Although transmission control according to the IP protocol is performed between the network and the network via an optical line, the present invention is not limited thereto. For example, an address other than an IP address may be set in the terminal device, and transmission may be controlled via an optical line using a predetermined communication protocol, such as a fire transmission protocol used in type R fire alarm equipment.

(others)
Furthermore, the present invention includes appropriate modifications without impairing its objects and advantages, and is not limited by the numerical values shown in the above embodiments.

10, 10-1 to 10-10: Optical converter 11: Tunnel 12: Disaster prevention receiving board 14, 14-1, 14-2: Optical line 14-11, 14-21: Regular optical line 14-12, 14- 22: Backup optical line 16: Power line 24: Fire hydrant device 25: Fire detector 46: Panel control section 48: Transmission section 50: Optical transmitting/receiving section 60: IO section 62: LAN lines 70, 72: Controller 74: Red Indicator light 76: Transmitter 78: Response lamp 80: Fire hydrant switch 82: Terminal control section 84: LAN transmission section 86: Drive circuit section 88: Input circuit section 90: Conversion control section 92: First gateway 94: Second gateway 100 -1: First optical transmitter/receiver 100-2: Second optical transmitter/receiver 102, 108: WDM filter 104, 110: Optical/electrical converter 106, 112: Electrical/optical converter 120: Disconnection point

Claims (6)

A disaster prevention receiver that transmits and receives optical signals,
a first optical line and a second optical line whose starting ends are connected to the disaster prevention receiving panel;
a plurality of optical converters that are sequentially connected in one or more units to the first optical line or the second optical line and mutually convert optical signals and electrical signals;
equipment connected to each of the plurality of optical converters and transmitting and receiving electrical signals;
a third optical line connecting the first optical line and the second optical line in a ring via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
Equipped with
The disaster prevention receiver is
A test signal is transmitted to the optical converter connected to the first optical line, a test response signal is sent back, and when the test response signal is disconnected, a disconnection and a disconnection location of the first optical line are determined. ,
A test signal is transmitted to the optical converter connected to the second optical line, a test response signal is sent back, and when the test response signal is cut off, a break in the second optical line and a break point are determined. ,
Emergency equipment characterized by:
A disaster prevention receiver that transmits and receives optical signals,
a first optical line and a second optical line whose starting ends are connected to the disaster prevention receiving panel;
a plurality of optical converters that are sequentially connected to the first optical line or the second optical line at different predetermined intervals and mutually convert optical signals and electrical signals;
equipment connected to each of the plurality of optical converters and transmitting and receiving electrical signals;
a third optical line connecting the first optical line and the second optical line in a ring via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
Emergency equipment characterized by being equipped with.
In the emergency equipment according to claim 2 ,
The disaster prevention receiver is
A test signal is transmitted to the optical converter connected to the first optical line, a test response signal is sent back, and when the test response signal is disconnected, a disconnection and a disconnection location of the first optical line are determined. ,
A test signal is transmitted to the optical converter connected to the second optical line, a test response signal is sent back, and when the test response signal is cut off, a break in the second optical line and a break point are determined. ,
Emergency equipment characterized by:
A disaster prevention receiver that transmits and receives optical signals,
a first optical line and a second optical line whose starting ends are connected to the disaster prevention receiving panel;
a plurality of optical converters that are sequentially connected to the first optical line or the second optical line and mutually convert optical signals and electrical signals;
equipment connected to each of the plurality of optical converters and transmitting and receiving electrical signals;
a third optical line connecting the first optical line and the second optical line in a ring via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
Equipped with
The disaster prevention receiver is
A test signal is transmitted to the optical converter connected to the first optical line, a test response signal is sent back, and when the test response signal is disconnected, a disconnection and a disconnection location of the first optical line are determined. ,
A test signal is transmitted to the optical converter connected to the second optical line, a test response signal is sent back, and when the test response signal is cut off, a break in the second optical line and a break point are determined. ,
Emergency equipment characterized by:
In the emergency equipment according to claim 1, 3 or 4,
When the disaster prevention receiving board determines that either the first optical line or the second optical line is disconnected and the disconnection location,
For an optical converter connected to the same optical line located in front of the disconnection point, continue transmitting and receiving optical signals to the optical line where the disconnection has been determined,
For the remaining optical converters connected to the same optical line located behind the disconnection point, switch to transmitting and receiving optical signals to the optical line for which the disconnection has not been determined.
Emergency equipment characterized by:
In the emergency equipment according to claim 1, 3 or 4,
When the disaster prevention receiver determines that the third optical line is disconnected,
causing the optical converter connected to the first optical line to continue transmitting and receiving optical signals to the first optical line;
causing the optical converter connected to the second optical line to continue transmitting and receiving optical signals to the second optical line;
Emergency equipment characterized by:

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