JP7380815B2 - signal control device - Google Patents

Description

The present invention relates to a signal control device that has both the functions of a traffic signal controller and an ITS wireless roadside device.

In recent years, vehicles receive information from ITS wireless roadside devices installed on roads (road-to-vehicle communication), or vehicles exchange information wirelessly (vehicle-to-vehicle communication), and the various types of information received are utilized by vehicles. Intelligent transportation systems (ITS) that improve the safety of vehicle traffic are being considered (for example, see Patent Document 1).
Furthermore, wireless communication standards have already been established assuming the above-mentioned intelligent transportation system (see, for example, Non-Patent Document 1).

The ITS wireless system is mainly composed of a plurality of ITS wireless lineside devices, which are infrastructure-side wireless devices, and in-vehicle wireless devices, which are radio devices for each vehicle.
In addition, in the case of a system that transmits intersection signal information to an on-vehicle communication device, the ITS wireless roadside device of the ITS wireless system is usually connected to the traffic signal controller that communicates with the central device via a dedicated line (for example, (See Patent Document 2).

Japanese Patent Application Publication No. 2010-170322 Japanese Patent Application Publication No. 2016-136375

Radio Industry Association “700MHz Band Intelligent Transport System ARIB-STDT109 Version 1.0” Established on February 14, 2012

ITS wireless roadside equipment that provides signal information is currently expensive. Therefore, if the components of the ITS wireless roadside device are housed in the casing of the traffic signal controller and the two are integrated, it is considered possible to reduce costs and contribute to the spread of the ITS wireless system.
However, when the components of the ITS wireless roadside device are housed in the casing of the traffic signal controller, it is desirable to be able to appropriately maintain the components of the ITS wireless roadside device, such as a wireless transmitter/receiver including a radio signal modulation/demodulation section.

In view of such conventional problems, the present invention provides an integrated signal control device in which the components of a traffic signal controller and an ITS wireless roadside device are housed in the same housing, in which the components of the ITS wireless roadside device can be properly maintained. The purpose is to make it possible.

(1) A signal control device according to one aspect of the present invention includes a housing, a first device that is a plurality of components necessary for a traffic signal controller housed in the housing, and a first device housed in the housing. a second device that is a plurality of components necessary for the ITS wireless roadside machine, and a power supply unit that supplies power to the first and second devices; a first converter that is an AC/DC converter for a first device; a second converter that is an AC/DC converter for the second device; and a main breaker that cuts off alternating current supplied to the first and second converters. , a breaker for the second device that is connected downstream of the main breaker and blocks alternating current supplied to the second converter.

(3) A signal control device according to another aspect of the present invention includes a casing, a first device that is a plurality of components necessary for a traffic signal controller, and a first device that is housed in the casing and that is housed in the casing. a second device that is a plurality of components necessary for the ITS wireless roadside machine, and a power supply unit that supplies power to the first and second devices; A common converter that is an AC/DC converter for the first and second devices, a DC distribution line that connects the first and second devices to the common converter in parallel, and a DC supply to the second device are cut off. and a DC switch for the second device.

According to the present invention, in an integrated signal control device in which the components of a traffic signal controller and an ITS wireless roadside device are housed in the same housing, the components of the ITS wireless roadside device can be appropriately maintained.

FIG. 1 is a perspective view showing the external configuration of a signal control device according to the present embodiment. FIG. 1A is a perspective view of the signal control device with the outer door and the inner door closed. FIG. 1B is a perspective view of the signal control device with the outer door open and the inner door closed. FIG. 2 is a block diagram showing the functional configuration of a signal control device. FIG. 2 is a block diagram showing a configuration example of a power supply unit of the signal control device. FIG. 3 is a front view of the signal control device with the outer door and the inner door open. FIG. 6 is an explanatory diagram showing variations in power distribution patterns within the housing. FIG. 7 is an explanatory diagram showing variations of other power distribution patterns within the housing. FIG. 7 is an explanatory diagram showing variations of other power distribution patterns within the housing. It is an explanatory view showing an example of commonization of electronic equipment in a signal control device.

<Summary of embodiments of the present invention>
Hereinafter, an overview of the embodiments of the present invention will be listed and explained.
(1) The signal control device of the present embodiment includes a casing, a first device, which is a plurality of components necessary for a traffic signal controller, housed in the casing, and a first device housed in the casing. It includes a second device that is a plurality of components necessary for the ITS wireless roadside machine, and a power supply unit that supplies power to the first and second devices, and the power supply unit supplies power to the first device. a first converter that is an AC/DC converter for the second device; a second converter that is an AC/DC converter for the second device; a main breaker that cuts off alternating current supplied to the first and second converters; A breaker for the second device is connected to the downstream side of the breaker and interrupts the alternating current supplied to the second converter.

According to the signal control device of this embodiment, by tripping the breaker for the second device connected downstream of the main breaker, the power supply to the second device is cut off while maintaining the power supply to the first device. can do.
Therefore, maintenance of the components of the ITS wireless roadside machine can be performed without stopping signal control at the intersection. Therefore, the components of the ITS wireless roadside machine can be appropriately maintained.
Further, by tripping the main breaker, power supply to the first device and the second device can be cut off.

(2) In the signal control device of the present embodiment, the power supply unit is connected downstream of the main breaker in parallel with the breaker for the second device, and interrupts the alternating current supplied to the first converter. It is preferable to further include a breaker for the first device.

In this case, by tripping the breaker for the first device connected downstream of the main breaker, it is possible to cut off the power supply to the first device while maintaining the power supply to the second device.
Therefore, maintenance of the components of the traffic signal controller can be performed without stopping wireless communication. Therefore, the components of the traffic signal controller can be properly maintained.

(3) The signal control device of the present embodiment includes a casing, a first device, which is a plurality of components necessary for a traffic signal controller, housed in the casing, and a first device housed in the casing. It includes a second device that is a plurality of components necessary for the ITS wireless roadside device, and a power supply unit that supplies power to the first and second devices, and the power supply unit supplies power to the first and second devices. a common converter that is an AC/DC converter for a second device; a DC distribution line that connects the first and second devices to the common converter in parallel; and a second device that cuts off the direct current supplied to the second device. It has a DC switch for equipment.

According to the signal control device of this embodiment, since a common converter is adopted, the number of parts can be reduced compared to the case where a converter for the first device and a converter for the second device are provided separately, and signal control The manufacturing cost of the device can be suppressed.
Moreover, by turning off the DC switch, it is possible to cut off the power supply to the second device while maintaining the power supply to the first device. Therefore, maintenance of the components of the ITS wireless roadside machine can be performed without stopping the signal control at the intersection.

<Details of embodiments of the present invention>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that at least some of the embodiments described below may be combined arbitrarily.

[External configuration of signal control device]
FIG. 1 is a perspective view showing the external configuration of a signal control device 1 according to the present embodiment.
FIG. 1A is a perspective view of the signal control device 1 with the outer door 4 and the inner door 5 closed. FIG. 1B is a perspective view of the signal control device 1 with the outer door 4 open and the inner door 5 closed.

As shown in FIG. 1, the signal control device 1 of this embodiment includes a casing 2 in the shape of a vertically long rectangular parallelepiped. The signal control device 1 of this embodiment employs a housing 2 with a double door structure.
Specifically, the casing 2 includes a casing main body 3 made of steel and formed to be open on the front side, and an outer door 4 and an inner door 5 made of steel provided at the opening of the casing main body 3. has.

A plurality of (two in the illustrated example) hinges 6 are attached to the outer peripheral side of the right opening edge of the housing body 3. The outer door 4 is a hinged door rotatably attached to the housing body 3 with a plurality of hinges 6.
A plurality of (three in the illustrated example) hinges 7 are attached to the inner peripheral side of the right opening edge of the housing body 3. The inner door 5 is a hinged door rotatably attached to the housing body 3 by a plurality of hinges 7.

A lock 8 having a key insertion slot is provided on the left side edge of the outer door 4. Therefore, the outer door 4 can be opened by unlocking the lock 8 and pulling the outer door 4 toward you. Conversely, if the outer door 4 is closed and the lock 8 is locked, unauthorized opening of the outer door 4 by a third party is prevented.
Moreover, the inner door 5 can be opened by pulling the closed inner door 5 toward you while the outer door 4 is open. As a result, the internal space of the casing body 3 is exposed, and control equipment and the like housed inside the casing body 3 can be accessed.

[Functional configuration of traffic signal controller]
FIG. 2 is a block diagram showing the functional configuration of the signal control device 1. As shown in FIG.
In FIG. 2, hatched blocks indicate functional units necessary for the traffic signal controller. Blocks with black corners indicate functional parts necessary for the ITS wireless roadside equipment.
As shown in FIG. 2, the signal control device 1 accommodates both a functional section necessary for a traffic signal controller and a functional section necessary for an ITS wireless roadside device inside one housing 2.

(Functional configuration regarding traffic signal controller)
The signal control device 1 includes a plurality of components necessary for a traffic signal controller, such as a signal control section 11, a lamp drive section 12, a transmitting/receiving section (TTR) 13, an interface section 14, a GPS antenna (optional) 15, and a power source. The housing 2 has a section 16 inside the housing 2 .

The signal control unit 11 includes a control board on which one or more CPUs (Central Processing Units) and a storage unit are mounted. The storage unit of the signal control unit 11 includes a nonvolatile memory that stores a control program executed by the CPU, and a volatile memory that temporarily stores the control program and necessary data.
The control programs executed by the CPU of the signal control unit 11 include a communication control program with a central device operated by a traffic manager, a control program for the lamp drive unit 12, and the like.

The signal control unit 11 adjusts the color of each light included in the signal lamp device 17 based on the signal control command received from the central device, the number of step seconds by periodic control, or the number of step seconds when point-sensitive control is executed. Determine when to switch on/off.
The signal control unit 11 outputs an on/off switching signal for each lamp color to the lamp drive unit 12 at the determined timing.

The lamp driving unit 12 has a relay unit corresponding to each signal lamp 17 installed for each inflow direction of the intersection.
The relay unit of the light device drive section 12 supplies each light (blue light, yellow light, red light, etc.) included in the signal light device 17 according to the on/off switching signal input from the signal control section 11. Turn on and off the voltage (for example, AC 100V). Thereby, the signal lamp color of the signal lamp device 17 changes at a predetermined timing specified by the signal control unit 11.

The transmitting/receiving unit 13 includes a terminal transmitter-receiver that mutually converts communication packets and carrier signals in accordance with a predetermined communication standard.
The transmitting/receiving unit 13 is composed of, for example, a network card equipped with a communication chip that performs the above-mentioned mutual conversion. The communication chip of the transmitter/receiver 13 may be a logic circuit with an unchanging circuit configuration, or may include an FPGA (Field Programmable Array).

Upon receiving the signal control command from the central device, the transmitting/receiving unit 13 passes the received signal control command to the signal control unit 11 . The signal control section 11 generates a switching signal to be output to the lamp drive section 12 according to the signal control command acquired from the transmission/reception section 13 .
For example, upon receiving a sensing signal from a signal control sensor 18 such as an ultrasonic vehicle sensor, the transmitting/receiving unit 13 transfers the received sensing signal to the central device.

The interface section 14 consists of a terminal board. This terminal block board includes a circuit board having printed wiring and a plurality of types of connectors that comply with different communication standards and are mounted on the circuit board.
The connector terminal blocks included in the interface section 14 are connected to each other by printed wiring on a circuit board. However, the connection between predetermined connector terminal blocks can also be interrupted by a switching operation.

The GPS antenna 15 is an antenna that receives GPS signals from GPS (Global Positioning System) satellites. The GPS signal includes ToD (Time of Day), 1 PPS (Pulse Per Second), and a 10 MHz sine wave network synchronized clock. This time information is used for time synchronization processing by the signal control section 11 and the transmitting/receiving section 13.

Since the implementation of the GPS antenna 15 for the traffic signal controller is an option, the GPS antenna 15 may be omitted from the signal controller 1.
Note that the antenna 15 is not limited to an antenna compliant with GPS, but may be an antenna compliant with other satellite positioning systems (for example, a quasi-zenith satellite system such as Michibiki).

The power supply section 16 is composed of a power supply unit that converts the voltage of a commercial power supply (for example, AC 100 V) into a DC voltage and supplies the converted DC voltage to the functional sections 11 to 14 for the traffic signal controller.
The power supply unit 16 includes various power devices such as a breaker, an AC/DC converter, and a constant voltage circuit.

(Functional configuration regarding ITS wireless roadside equipment)
The signal control device 1 includes a transmitting/receiving section 21, a wireless transmitting/receiving section 22, an interface section 23, a GPS antenna 24, an ITS radio antenna 25, and a power supply section 26 as a plurality of components necessary for an ITS wireless lineside machine. has inside.

The transmitting/receiving unit 21 is composed of a network card equipped with a communication chip that mutually converts communication packets and carrier signals in accordance with a predetermined communication standard. The communication chip of the transmitter/receiver 21 may be a logic circuit whose circuit configuration remains unchanged, or may include an FPGA.

The transmitting/receiving section 21 also includes a control section for controlling communication. The control unit includes one or more CPUs and a storage unit. The storage unit includes a nonvolatile memory that stores a control program executed by the CPU, and a volatile memory that temporarily stores the control program and necessary data.
The control programs executed by the CPU for the ITS wireless roadside machine include a communication control program with a central device operated by a traffic manager, a communication control program for wireless communication, and the like.

When the transmitter/receiver 21 receives a sensing signal from a sensor 27 for DSSS (Driving Safety Support Systems) such as a vehicle sensor, the transmitter/receiver 21 transfers the received sensing signal to the wireless transmitter/receiver 22 . The wireless transmitter/receiver 22 wirelessly transmits the received sensing signal to the vehicle-mounted device.
The wireless transmitting/receiving unit 22 is composed of a network card equipped with a communication chip that mutually converts communication packets and carrier signals in accordance with a predetermined communication standard. The communication chip of the wireless transmitter/receiver 22 may be a logic circuit whose circuit configuration remains unchanged, or may include an FPGA.

The wireless transmitter/receiver 22 also includes a wireless signal modulator/demodulator. The modulation/demodulation section of the wireless transmitting/receiving section 22 modulates the electrical signal generated by the communication chip of the wireless transmitting/receiving section 22 into a wireless signal, and outputs the radio signal to the ITS wireless antenna 25 .
The modulation/demodulation section of the wireless transmitting/receiving section 22 demodulates the wireless signal input from the ITS wireless antenna 25 into an electrical signal and outputs it to the communication chip of the wireless transmitting/receiving section 22 .

When receiving probe data from a vehicle that performs vehicle-to-vehicle communication, the wireless transmitter/receiver 22 transfers the received probe data to the central device.
When the wireless transmitting/receiving unit 22 receives the information provided for vehicles (such as traffic jam information) from the central device, it outputs the received information provided for the vehicle to the ITS wireless antenna 25 and broadcasts it to the vehicle.

The transceiver section 13 for the traffic signal controller, the transceiver section 21 and the radio transceiver section 22 for the ITS wireless roadside device are connected to each other. Therefore, these transmitting/receiving units 13, 21, and 22 can mutually exchange predetermined information.
For example, when providing intersection signal information to a vehicle, the transmitter/receiver 13 transfers the signal information generated by the signal controller 11 to the wireless transmitter/receiver 22 . The wireless transmitter/receiver 22 outputs the received signal information to the ITS wireless antenna 25. Thereby, signal information of the intersection can be broadcast to vehicles traveling on the inflow path of the intersection.

Furthermore, when the sensing signal of the DSSS sensor 27 is used for safe driving support, the transmitting/receiving section 21 transfers the sensing signal of the DSSS sensor 27 to the wireless transmitting/receiving section 22 .
The wireless transmitter/receiver 22 outputs the received sensing signal to the ITS wireless antenna 25. Thereby, information on vehicles traveling on other inflow roads of the intersection can be transmitted in advance to vehicles running on the inflow road of the intersection.

The GPS antenna 25 is an antenna that receives GPS signals from GPS satellites. The GPS signals include ToD, 1PPS, and a 10MHz sine wave network synchronized clock. These time information are used for time synchronization processing by the transmitter/receiver 21.
Note that the antenna 24 is not limited to an antenna compliant with GPS, but may be an antenna compliant with other satellite positioning systems (for example, a quasi-zenith satellite system such as Michibiki).

The power supply section 26 is composed of a power supply unit that converts the voltage of a commercial power supply (for example, AC 100 V) into a DC voltage and supplies the converted DC voltage to the functional sections 21 to 23 for the ITS wireless lineside equipment.
The power supply section 26 includes various power devices such as a breaker, an AC/DC converter, and a constant voltage circuit.

[Power supply unit of signal control device]
FIG. 3 is a block diagram showing a configuration example of the power supply unit PS of the signal control device 1. As shown in FIG. In FIG. 3, straight lines indicate AC distribution lines, and broken lines indicate DC distribution lines.
As shown in FIG. 3, the power supply unit PS of this embodiment includes two power supply units 16 and 26. Hereinafter, the system that supplies power to the functional units 11 to 14 of the traffic signal controller will be referred to as the "first system", and the system that supplies power to the functional units 21 to 23 of the ITS wireless roadside device will be referred to as the "second system". .

The first series power supply section 16 includes a traffic light breaker 31 located on the most upstream side (leftmost in FIG. 3), two types of converters 32 and 33 placed second from the upstream side, and two types of converters 32 and 33 placed second from the upstream side. This includes the lamp breaker 34 located at the second position.
The upstream side of the traffic light breaker 31 is connected to a commercial power source. On the downstream side of the traffic light breaker 31, two types of converters 32 and 33 and a lamp breaker 34 are connected in parallel. The lamp driving section 12 is connected to the downstream side of the lamp breaker 34 .

The two types of converters 32 and 33 are both AC/DC converters, and include a first converter 32 for the signal control section 11 and a second converter 33 for other functional sections.
The first converter 32 converts alternating current supplied from a commercial power source into direct current, and supplies the converted direct current voltage to the signal control unit 11 . The second converter 33 converts alternating current supplied from a commercial power source into direct current, and supplies the converted direct current voltage to the transmitting/receiving section 13 and the interface section 14, respectively.

The second series power supply unit 26 includes an ITS wireless breaker 41 located at the most upstream side (leftmost in FIG. 3) and one type of converter 42 located second from the upstream side.
The upstream side of the ITS wireless breaker 41 is connected to a commercial power source. A converter 42 consisting of an AC/DC converter is connected to the downstream side of the ITS wireless breaker 41. The converter 42 converts alternating current supplied from a commercial power source into direct current, and supplies the converted direct current voltage to the transmitting/receiving section 21, the wireless transmitting/receiving section 22, and the interface section 23, respectively.

[Internal configuration of signal control device]
FIG. 4 is a front view of the signal control device 1 with the outer door 4 and the inner door 5 open. Note that in FIG. 4, illustration of each of the antennas 15, 24, and 25 is omitted.
As shown in FIG. 4, in the signal control device 1 of this embodiment, the devices 11 to 14, 16 necessary for the traffic signal controller and the devices 21 to 23, 26 necessary for the ITS wireless roadside device are housed in the housing body 3. The inner space 3A and the inner surface 5A of the inner door 5 are respectively installed at appropriate locations.

Specifically, in the internal space 3A of the housing body 3, the interface parts 14 and 23, the lamp drive part 12, and the power supply unit PS are housed in order from top to bottom.
The interface section 14 for the traffic signal controller is installed at the uppermost rear side of the interior space 3A, and the interface section 23 for the ITS wireless trackside device is installed at the uppermost front side of the interior space 3A. That is, the interface 23 is placed in front of the interface section 14 so as to overlap with it.

A lamp drive section 12 for a traffic signal controller is installed below the interface sections 14 and 23 in the interior space 3A. The lamp drive unit 12 is located approximately at the vertical center of the interior space 3A, and occupies approximately one-third of the vertical range of the interior space 3A.
Each component of both power supply parts 16 and 26 which constitute power supply unit PS is installed in the lowest part of internal space 3A.

Specifically, the first and second series converters 32, 33, and 42 are installed approximately at the center of the lowermost portion of the internal space 3A.
Of these, the first series converters 32 and 33 are installed on the back side of the interior space 3A, and the second series converter 42 is installed on the front side of the interior space 3A. That is, converter 42 is placed in front of converters 32 and 33 so as to overlap.

The first and second series of breakers 31, 34, and 41 are installed toward the right side of the lowest part of the internal space 3A.
Of these, the first series of signal breaker 31 and lamp breaker 34 are installed close to the right end of the lowermost part of the interior space 3A. The second series of ITS wireless breaker 41 is installed on the left side of the first series of traffic light breaker 31, and there is a slight gap between them.

On the inner surface 5A of the inner door 5, in order from top to bottom, there are a transmission/reception unit (TTR) 13 for a traffic signal controller, a signal control unit 11, a transmission/reception unit 21 for an ITS wireless roadside device, and a wireless transmission/reception unit 22. is installed.
The transmitting/receiving section 13 for the traffic signal controller is attached to the top of the inner surface 5A, and the signal controlling section 11 for the traffic signal controller is attached adjacent to the position immediately below the transmitting/receiving section 13 on the inner surface 5A. There is.

The transmitter/receiver section 21 for the ITS wireless roadside device is attached at a lower position slightly spaced from the lower end of the signal control section 11 for the traffic signal controller on the inner surface 5A.
The wireless transmitter/receiver unit 22 for the ITS wireless lineside device is attached at a position slightly to the right at the bottom of the inner surface 5A.

The transmission/reception unit 13 for the traffic signal controller has a display unit 13A (see FIG. 1) that displays the operating status of the traffic signal controller. The display section 13A can accept manual operation input, and is exposed to the front side through an upper slit formed in the upper part of the inner door 5.
Therefore, in the state shown in FIG. 1B in which the outer door 4 is open and the inner door 5 is closed, the traffic manager worker can visually check the operating state of the traffic signal controller, and input operation information on the display section 13A. can be executed.

The transmitting/receiving unit 21 for the ITS wireless lineside machine has a display unit 21A (see FIG. 1) that displays the operating status of the ITS wireless lineside machine. The display section 21A is capable of accepting manual operation input, and is exposed on the surface side through a lower slit formed at approximately the center of the inner door 5.
Therefore, in the state shown in FIG. 1B in which the outer door 4 is open and the inner door 5 is closed, the traffic manager worker can visually check the operating state of the ITS wireless roadside machine, and input operation information on the display section 21A. can be executed.

[Problems with signal control equipment and their solutions]
If the signal light device 17 is to be turned off, it is necessary to place a police officer at the intersection in advance. For this reason, it is preferable that the power supply to the components of the traffic signal controller (particularly the signal controller 11 and the lamp drive unit 12) be stopped as much as possible.
When the signal control unit 11 and the lamp drive unit 12 operate, it is possible to perform at least signal control based on periodic control without receiving a signal control command from the central device.

However, since the signal control device 1 of this embodiment is an integrated type in which the components of the traffic signal controller and the ITS wireless roadside device are housed in the same housing 2, the signal control device 1 has a smaller housing than a normal traffic signal controller. The more devices there are in the housing 2, the more frequently the housing 2 is opened for maintenance.
For example, if large noise is included in the radio waves transmitted by the wireless transmitter/receiver 22 including the modulator/demodulator, the outer door 4 and inner door 5 of the housing 2 are opened and the power supply to the wireless transmitter/receiver 22 is stopped. It is necessary to confirm.

Therefore, if the power distribution pattern is such that when the power supply to the wireless transmitter/receiver 22 is stopped, the power supply to the signal controller 11 and the lamp drive unit 12 is also stopped, the signal lamp 17 must be turned off, and traffic signal control at the intersection cannot be performed during maintenance.
Therefore, in this embodiment, as the power distribution pattern of the power supply unit PS, a power distribution pattern that can individually cut off the power supply to the components of the ITS wireless lineside machine is adopted.

[Power distribution pattern of power supply unit]
FIG. 5 is an explanatory diagram showing variations in the power distribution pattern within the housing 2. As shown in FIG. In FIG. 5, straight lines indicate AC distribution lines, and broken lines indicate DC distribution lines.
As shown in FIG. 5, variations in the power distribution pattern of the power supply unit PS include a plurality of types of power distribution patterns A1 to A3.

(Power distribution pattern A1)
The power supply unit PS of the power distribution pattern A1 includes a main breaker 50 located at the most upstream side (the leftmost side in FIG. 5), and a two-system power supply section located at the downstream side of the main breaker 50 (the right side in FIG. 5). 51 and 55.
The upstream side of the main breaker 50 is connected to a commercial power source. Note that in the power supply unit PS of the power distribution pattern A1, the main breaker 50 is not essential and may be omitted.

The first series power supply section 51 includes a traffic light breaker 52, a converter 53, and a lamp breaker 54. The second series power supply unit 55 includes an ITS wireless breaker 56 and a converter 57.
On the downstream side of the main breaker 50, a traffic light breaker 52 and an ITS radio breaker 56 are connected in parallel. On the downstream side of the traffic light breaker 52, a converter 53 and a lamp breaker 54 are connected in parallel.

The lamp driving section 12 is connected to the downstream side of the lamp breaker 54. A converter 57 is connected downstream of the ITS wireless breaker 56.
Converters 53 and 57 are both AC/DC converters. The converter 53 converts alternating current supplied from a commercial power source into direct current, and supplies the converted direct current voltage to electronic equipment (other than the lamp drive unit 12) of the traffic signal controller. The converter 57 converts alternating current supplied from a commercial power source into direct current, and supplies the converted direct current voltage to the electronic equipment of the ITS wireless lineside machine.

(Power distribution pattern A2)
The power distribution pattern A2 differs from the power distribution pattern A1 in that the traffic light breaker 52 is omitted from the first series power supply unit 51.
In the power distribution pattern A2, the first series of lamp breaker 54 is connected downstream of the main breaker 50 in parallel with the converter 53 and the ITS wireless breaker 56.

(Power distribution pattern A3)
The power distribution pattern A3 differs from the power distribution pattern A1 in that the first series of light equipment breakers 54 is connected to the downstream side of the main breaker 50 in parallel with the traffic light breaker 52 and the ITS wireless breaker 56. It is in.
Note that also in the power supply unit PS of the power distribution pattern A3, the main breaker 50 is not essential and may be omitted.

In the power distribution patterns A1 to A3 in FIG. 5, a converter 53 for the first device, which is a necessary component for the traffic signal controller, and a converter 57 for the second device, which is a plurality of components necessary for the ITS wireless roadside device. and a breaker 56 that cuts off the alternating current supplied to the converter 57.
Therefore, by tripping the breaker 56, it is possible to cut off the power supply to the second device while maintaining the power supply to the first device. Therefore, maintenance of the components of the ITS wireless roadside machine (for example, the wireless transmitting/receiving unit 22) can be performed without stopping the signal control at the intersection.

[Other power distribution patterns of power supply unit]
6 and 7 are explanatory diagrams showing variations of other power distribution patterns within the housing 2. In these figures, straight lines indicate AC distribution lines and dashed lines indicate DC distribution lines.
Specifically, FIG. 6 shows power distribution patterns B1 and B2 for the AC portion, and FIG. 7 shows power distribution patterns C1 to C4 for the DC portion. Node N in FIGS. 6 and 7 indicates a connection point between power distribution patterns C1 to C4 that can be connected to each power distribution pattern B1 and B2.

(Power distribution pattern B1)
The power supply unit PS of the power distribution pattern B1 includes a main breaker 60 arranged at the most upstream side (the leftmost side in FIG. 6) and a sub breaker 61 connected in parallel to the downstream side of the main breaker 60 (the right side in FIG. 6). and a lamp breaker 63.
A converter 62 is connected to the downstream side of the sub-breaker 61. The lamp driving section 12 is connected to the downstream side of the lamp breaker 63.

The converter 62 is a common AC/DC converter that supplies DC voltage to each electronic device housed in the housing 2, regardless of whether it is for signal control or for ITS radio.
Therefore, the converter 62 converts alternating current supplied from a commercial power source into direct current, and supplies the converted direct current voltage to electronic equipment (other than the lamp drive unit 12) of the traffic signal controller and the ITS wireless roadside machine. do.

(Power distribution pattern B2)
The power distribution pattern B2 differs from the power distribution pattern B1 in that the sub-breaker 61 is omitted.
In power distribution pattern B2, the common converter 62 is connected downstream of the main breaker 60 in parallel with the lamp breaker 63.

(Combination of power distribution patterns)
Node N of power distribution pattern B1 in FIG. 6 can be connected to nodes N of power distribution patterns C1 to C4 shown in FIG. Node N of power distribution pattern B2 in FIG. 6 can also be connected to nodes N of power distribution patterns C1 to C4 shown in FIG.
Therefore, there are the following eight variations of the power supply unit PS that can be adopted by combining the power distribution patterns B1 and B2 and the power distribution patterns C1 to C4.

Power distribution pattern B1 → power distribution pattern C1
Power distribution pattern B1 → power distribution pattern C2
Power distribution pattern B1 → power distribution pattern C3
Power distribution pattern B1 → power distribution pattern C4

Power distribution pattern B2 → power distribution pattern C1
Power distribution pattern B2 → power distribution pattern C2
Power distribution pattern B2 → power distribution pattern C3
Power distribution pattern B2 → power distribution pattern C4

Power distribution patterns B1 and B2 in FIG. 6 include a common converter 62 that supplies DC voltage to each electronic device housed in the housing 2, regardless of whether it is for signal control or for ITS wireless.
Therefore, compared to the case where the converter for the electronic equipment of the traffic signal controller and the converter for the power equipment of the ITS wireless trackside unit are provided separately (the case shown in Fig. 5), the number of parts can be reduced, and the number of parts can be reduced. It has the advantage of suppressing production costs.

(Power distribution pattern C1)
Power distribution pattern C1 includes two DC switches 64 and 65 connected in parallel to the DC side of converter 62.
A first device is connected to the DC switch 64. The first device is a plurality of components (other than the lamp drive section 12) necessary for the traffic signal controller. A second device is connected to the DC switch 65. The second equipment is a plurality of components necessary for the ITS wireless roadside machine.

(Power distribution pattern C1)
The power distribution pattern C2 differs from the power distribution pattern C1 in that the DC switch 64 is omitted.
In the power distribution pattern C2, the first devices (other than the lamp drive unit 22) are connected to the common converter 62 in parallel with the DC switch 65.

(Power distribution pattern C3)
The power distribution pattern C3 differs from the power distribution pattern C1 in that two types of DC switches 64A and 64B are employed as DC switches for the traffic signal controller.
Among these, the DC switch 64A is a switch for electronic devices other than the lamp drive section 12 and the signal control section (LCC) 11, and the DC switch 64B is a switch for the signal control section 11.

(Power distribution pattern C4)
The power distribution pattern C4 differs from the power distribution pattern C3 in that the DC switch 64B for the signal control unit 11 is omitted.
In the power distribution pattern C4, the signal control unit 11 is connected to the common converter 62 in parallel with the DC switches 64A and 65.

In the power distribution patterns C1 to C4 in FIG. 7, the DC power distribution line that connects the first device and the second device to the converter 62 in parallel includes a DC switch 65 that cuts off the direct current supplied to the second device.
Therefore, by turning off the DC switch 65, it is possible to cut off the power supply to the second device while maintaining the power supply to the first device. Therefore, maintenance of the components of the ITS wireless roadside machine (for example, the wireless transmitting/receiving unit 22) can be performed without stopping the signal control at the intersection.

[Commonization of electronic devices inside the housing]
FIG. 8 is an explanatory diagram showing an example of commonization of electronic devices in the signal control device 1.
As shown by the broken line frame S1 in FIG. 8, it is preferable that the interface unit 14 of the traffic signal controller and the interface unit 23 of the ITS wireless roadside device be integrated into one circuit board and shared.
As a result, the number of parts to be housed in the housing 2 is reduced, so the manufacturing cost of the signal control device 1 can be suppressed.

As shown in a broken line frame S2 in FIG. 8, it is preferable that the GPS antenna 15 of the traffic signal controller and the GPS antenna 24 of the ITS wireless roadside device be shared by one antenna.
Also in this case, the number of parts to be accommodated in the housing 2 is reduced, so the manufacturing cost of the signal control device 1 can be suppressed.

As shown in a broken line frame S3 in FIG. 8, it is preferable that the transmitter/receiver (TTR) 13 of the traffic signal controller and the transmitter/receiver 21 of the ITS wireless roadside device be integrated into one circuit board and shared.
Also in this case, the number of parts to be accommodated in the housing 2 is reduced, so the manufacturing cost of the signal control device 1 can be suppressed.

[Example of preferred breaker installation]
As shown in a broken line frame S4 in FIG. 4, in the signal control device 1 of this embodiment, a plurality of breakers 31, 34, 41 are arranged in a concentrated manner so as to be close to each other in the left and right direction, and each breaker 31, 34, No electronic components such as a circuit board are interposed between 41.
Therefore, wiring of AC power distribution lines such as AC100V is easy, and there is an advantage that the wiring can be shortened. Furthermore, since there is no electronic component such as a circuit board between the breakers 31, 34, and 41, there is an advantage that noise from the power supply wiring can be suppressed from entering the circuit.

[Other variations]
The embodiments described above are illustrative in all respects and are not restrictive. The scope of rights of the present invention is indicated by the claims, and it is intended that all changes within the meaning and range equivalent to the claims are included.
For example, in the embodiment described above, the casing 2 of the signal control device 1 may be a casing with a single door structure having only the outer door 4.

In the above-described embodiment, the communication function section of the ITS wireless lineside machine consists of two circuit boards (network cards), the transmitter/receiver section 21 and the wireless transmitter/receiver section 22, but the communication function section is mounted on a single circuit board. Alternatively, it may be mounted separately on three or more circuit boards.

1 Signal control device 2 Housing 3 Housing body 3A Internal space 3B Housing 4 Outer door 5 Inner door 5A Inner surface 6 Hinge (for outer door)
7 Hinge (for inner door)
8 Lock 11 Signal control section 12 Lamp drive section 13 Transmission/reception section (TTR)
13A Display section 14 Interface section 15 GPS antenna 16 Power supply section (for traffic signal controller: 1st series)
17 Signal lamp device 18 Signal control sensor 19 Modem 21 Transmitting/receiving section 21A Display section 22 Wireless transmitting/receiving section 23 Interface section 24 GPS antenna 25 ITS radio antenna 26 Power supply section (for ITS wireless line side unit: 2nd series)
27 DSSS sensor 31 Traffic light breaker 32 First converter 33 Second converter 34 Light equipment breaker 41 ITS radio breaker 42 Converter 50 Main breaker 51 Power supply section (for traffic signal controller: 1st series)
52 Traffic light breaker 53 Converter (first converter)
54 Light equipment breaker 55 Power supply section (for ITS wireless roadside unit: 2nd series)
56 ITS wireless breaker 57 Converter (second converter)
60 Main breaker 61 Sub breaker 62 Converter (common converter)
63 Light equipment breaker 64 DC switch 64A DC switch 64B DC switch 65 DC switch PS Power supply unit

Claims (1)

A casing and
a first device, which is a plurality of components necessary for a traffic signal controller, housed in the housing;
a second device that is a plurality of components necessary for the ITS wireless roadside machine, which is housed in the housing;
A power supply unit that supplies power to the first and second devices,
The power supply unit includes:
a common converter that is an AC/DC converter for the first and second devices;
a DC distribution line connecting the first and second devices to the common converter in parallel;
A signal control device comprising: a DC switch for the second device that cuts off direct current supplied to the second device.

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