JP2013142960A - Traffic signal controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traffic signal controller that can transmit failure information of an own machine outside even during power saving operation in which telecommunication function is blocked.SOLUTION: A traffic signal controller 1 includes a control part 36 for transmitting information such that an abnormality occurs in a lighting instrument control part 2 to a central device 6 and a communication control part 3 having a communication power source part 31 for supplying electricity to the control part 36, and performs power saving operation by stopping the communication power source part 31. The communication control part 3 has a detection circuit 35 that detects an abnormality in the lighting instrument control part 2 during power saving operation to output a start command for starting the communication power source part 31 to the communication power source part 31 on the basis of the detection.

Description

  The present invention relates to a traffic signal controller that performs a power saving operation by interrupting a communication function with a central device installed in a traffic control center or the like.

At an intersection or a pedestrian crossing, a traffic signal controller is installed to control the lighting and extinction of signal lights such as blue, yellow, red and blue arrows at predetermined time intervals.
Such traffic signal controllers include “centralized type” and “point type”. Among these, the centralized traffic signal controller has a function of performing information communication with a central device installed in a traffic control center or the like, and the point type traffic signal controller is connected to the central device. The signal lamp is controlled independently without performing the above communication.

  Moreover, as a traffic signal controller of this type, a commercial power source that is an auxiliary power source is used only when it is determined that power supply from a solar cell that is a main power source is insufficient with a solar cell as a main power source and a commercial power source as an auxiliary power source. There is known a power-saving traffic signal controller that compensates for necessary power (see Patent Document 1).

Japanese Patent Laid-Open No. 2003-281691

  However, in the traffic signal controller of Patent Document 1 described above, for example, in the case of rainy or cloudy weather, when power supply by solar cells is insufficient, even when there is a large power demand to reduce the amount of commercial power used. The commercial power source is selected, and as a result, the amount of commercial power used cannot be reduced.

In view of this, the applicant of the centralized traffic signal controller, when receiving the power saving mode command from the central device, stops the power supply of a part of the devices controlled by the own device, thereby the traffic signal controller. Have been proposed (Japanese Patent Application No. 2011-136626, hereinafter referred to as “prior application invention”).
This traffic signal controller includes a lamp control unit that controls lighting and extinction of a signal lamp, a communication unit that receives a command from the central device, and a power control unit that individually controls power supply of these devices. ing. The power supply control unit stops the power supply to the communication unit in accordance with the power-saving mode command received from the central device, so that the traffic signal controller performs power-saving operation while maintaining the function of the traffic signal controller. It has become.

By the way, the communication unit of the centralized traffic signal controller plays a role of transmitting the failure information to the central device when a failure occurs in the lamp control unit, in addition to receiving a command from the central device. Yes.
However, since the traffic signal controller of the invention of the prior application stops power supply to the communication unit and shuts off the communication function with the central device when performing power saving operation, the lamp control unit during power saving operation If a failure occurs, the failure information cannot be transmitted immediately to the central unit. For this reason, there is a risk that traffic congestion will occur due to delays in repair and failure analysis of the lamp control unit.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a traffic signal controller capable of transmitting failure information of its own device to the outside even during power-saving operation with the communication function cut off. And

  (1) A traffic signal controller according to the present invention includes a lamp control unit that controls lighting and extinction of a signal lamp, a control unit that transmits information indicating that an abnormality has occurred in the lamp control unit to a central device, and And a communication control unit having a communication power supply unit that supplies power to the control unit, and a traffic signal controller that performs power saving operation by stopping the communication power supply unit, wherein the communication control unit includes the power saving operation unit. And a detection circuit that detects an abnormality in the lamp control unit and outputs a start command for starting the communication power supply unit to the communication power supply unit based on the detection.

  According to the present invention, when an abnormality occurs in the lamp control unit when the communication power supply unit is stopped and the power saving operation is performed, the detection circuit starts the communication power supply unit by detecting the abnormality. Can do. Thereby, since the control part of a communication control part is electrically fed by a communication power supply part, the information to the effect that abnormality occurred in the lamp control part can be transmitted to a central apparatus. As a result, repair and failure analysis of the lamp control unit can be performed quickly, so that the occurrence of traffic congestion can be effectively suppressed.

(2) When the power is supplied during the power saving operation, the control unit collects whether or not an abnormality has occurred in the device constituting the lamp control unit from the device, and the collection result is the center. Preferably it is sent to the device.
In this case, since it becomes easy to identify a device in which an abnormality has occurred in the lamp control unit based on information transmitted from the control unit to the central device, repair and failure analysis of the lamp control unit are performed more quickly. be able to.

(3) The lamp controller can communicate with the controller, and the controller can communicate with the lamp controller when an abnormality has occurred in all of the devices. It is preferable to determine which one of the abnormality of the device and the abnormality of the power feeding to the device is based on whether the determination result is transmitted to the central device.
In this case, based on the information transmitted from the control unit to the central device, it is possible to easily identify whether the device constituting the lamp control unit is abnormal or the power supply to the device is abnormal. Repair and failure analysis can be performed more quickly.

(4) It is preferable that the communication control unit includes a power storage unit that detects an abnormality of the communication power supply unit and supplies power to the communication power supply unit based on the detection.
In this case, when an abnormality occurs in the lamp control unit, even if it is not possible to supply power to the control unit due to an abnormality in the communication power supply unit, it is possible to supply power to the control unit using the power storage unit, Information indicating that an abnormality has occurred in the lamp control unit can be reliably transmitted to the central device.

(5) Preferably, the control unit collects information indicating that an abnormality has occurred in the communication power supply unit from the power storage unit, and transmits the collected information to the central device.
In this case, based on the information transmitted from the control unit to the central device, it is possible to quickly grasp that an abnormality has occurred in the communication power supply unit of the communication control unit. Can be done.

  According to the present invention, it is possible to return to a communicable state by detecting a failure of the own device during the power saving operation. Therefore, even during the power saving operation in which the communication function is interrupted, Failure information can be transmitted to the outside.

It is a block diagram which shows the structural example of the traffic signal controller which concerns on the 1st Embodiment of this invention. It is a sequence diagram which shows the operation | movement at the time of abnormality generation | occurrence | production during the power saving operation in the traffic signal controller of FIG. It is a block diagram which shows the structural example of the traffic signal controller which concerns on the 2nd Embodiment of this invention. It is a sequence diagram which shows the operation | movement at the time of abnormality generation | occurrence | production in the power-saving driving | operation in the traffic signal controller of FIG. It is a block diagram which shows the structural example of the traffic signal controller which concerns on the 3rd Embodiment of this invention. It is a sequence diagram which shows the operation | movement at the time of abnormality generation | occurrence | production during the power saving operation in the traffic signal controller of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Configuration of traffic signal controller]
FIG. 1 is a block diagram showing a configuration example of a traffic signal controller according to the first embodiment of the present invention. The traffic signal controller 1 of this embodiment is a centralized type having a function of performing information communication with a central device 6 installed in a traffic control center or the like, and lighting of a signal lamp (not shown) and A lamp control unit 2 that controls turning off and a communication control unit 3 that performs information communication with the central device 6 are provided. The central device 6 is connected to a plurality of centralized traffic signal controllers 1 in the jurisdiction area of the central device through a communication line.

  The lamp control unit 2 includes a voltage conversion circuit 21, a CPU 22, an RTC (real time clock) 23, and an LSI 24. The voltage conversion circuit 21 includes a DC / DC conversion circuit, and converts an input voltage (12V) input from a DC power source into a predetermined output voltage (3V). A CPU 22 and an RTC 23 are connected to the voltage conversion circuit 21, and the CPU 22 and the RTC 23 are operated by a DC voltage supplied from the voltage conversion circuit 21. The LSI 24 is connected to the RTC 23 and is operated by a DC voltage supplied from the voltage conversion circuit 21 via the RTC 23.

The CPU 22 is composed of a programmable arithmetic device, and can generate the lamp color switching timing of the signal lamp by executing a computer program stored in a storage device (not shown) such as a memory or an HDD.
For example, the CPU 22 determines the switching timing for turning on and off the signal lamp for each cycle based on the signal control parameter received from the central device 6 received by the communication control section 3, and determines the timing signal for the lamp driving section ( (Not shown).

In addition, the CPU 22 records a predetermined switching pattern set in advance in the storage device, and can determine the switching timing for turning on and off the signal lamp from the pattern read from the storage device.
Further, the CPU 22 can communicate with the power supply control circuit 34 and the control circuit 37 of the control unit 36, which will be described later, via the LAN 4, and obtains a power saving mode command from the central device 6 via the control circuit 37. In order to perform power saving operation, the operation time is stored in the storage device, and a stop signal for stopping the power supply of the communication power supply unit 31 (described later) of the communication control unit 3 is output to the power supply control circuit 34. Then, during the operation time, the CPU 22 outputs a timing signal for switching on / off of the signal lamp according to the switching pattern stored in the storage device as described above to the lamp driving unit.

  The communication control unit 3 includes a communication power supply unit 31, a detection circuit 35, and a control unit 36. The communication power supply unit 31 includes a main power supply 32 that supplies power to the control unit 36 and a power supply control circuit 34 that performs control to start and stop the main power supply 32. The main power supply 32 includes a DC / DC conversion circuit for converting an input voltage (12V) input from a DC power supply into a predetermined output voltage (5V). When the power supply control circuit 34 receives a stop signal from the CPU 22 of the lamp control unit 2, the power supply control circuit 34 stops the main power supply 32 and its own circuit, thereby performing the power saving operation of the traffic signal controller 1. In addition, when the power supply control circuit 34 receives a start signal from a state of being stopped during the power saving operation, the power supply control circuit 34 is supplied with a voltage from the DC power supply and starts up, and outputs a start signal for starting the main power supply 32.

  The detection circuit 35 is directly supplied with a voltage from a DC power source, detects whether or not an abnormality has occurred in the equipment constituting the lamp control unit 2 during the power saving operation, and the abnormality has occurred in the equipment. When it is detected that the communication power supply unit 31 is activated, an activation signal (activation command) for activating the communication power supply unit 31 is output to the communication power supply unit 31. Specifically, the detection circuit 35 is connected to the CPU 22, the RTC 23, and the LSI 24 of the lamp control unit 2, and when the output signals of these devices are H signals (high level signals), they are in a normal state. It is determined that there is a normal state, and in the case of an L signal (low level signal), each is determined to be an abnormal state in which an abnormality has occurred. When the detection circuit 35 determines that one of the devices is in an abnormal state, the detection circuit 35 outputs an activation signal for activating the power supply control circuit 34 to the power supply control circuit 34.

The control unit 36 includes a control circuit 37 and a communication device 38. The control circuit 37 and the communication device 38 are respectively connected to the main power supply 32 via a DC / DC conversion circuit (not shown), and corresponding DC voltages are respectively supplied from the main power supply 32 via the DC / DC conversion circuit. It is designed to work when supplied.
The communication device 38 is connected to the central apparatus 6 through a predetermined communication line, and exchanges predetermined information with the central apparatus 6 through this communication line. For example, the communication device 38 receives from the central apparatus 6 signal control parameters such as cycle length, offset, and split, and a power saving mode command necessary for traffic signal control performed by itself. In addition, the communication device 38 includes control execution information including information on the time when the signal lamp is turned on / off, information indicating that an abnormality has occurred in the devices constituting the lamp controller 2 (first abnormality information) S1, and the like. Is transmitted to the central device 6.

  The control circuit 37 is composed of a programmable arithmetic device, and by executing a computer program stored in a storage device (not shown) such as a memory or an HDD, the power control circuit 34 and the CPU 22 and the LAN 4 of the lamp control unit 2 are connected. And exchanges predetermined information between them. For example, the control circuit 37 transmits the signal control parameter and the power saving mode command received by the communication device 38 to the CPU 22 of the lamp control unit 2. In addition, when the control circuit 37 receives a power supply stop instruction signal for performing power saving operation from the CPU 22 of the lamp control unit 2, the control circuit 37 outputs a stop signal for stopping the communication power supply unit 31 to the power supply control circuit 34. Note that the control circuit 37 outputs a stop signal to the power supply control circuit 34 by acquiring a power saving mode command from the central device 6, but determines the timing for power saving operation by itself and outputs the stop signal. You may make it output.

  Furthermore, when the detection circuit 35 detects an abnormality in the lamp control unit 2 and is supplied with voltage from the main power supply 32 during the power saving operation, the control circuit 37 generates an abnormality in the devices constituting the lamp control unit 2. Whether or not the device is in use. Specifically, the control circuit 37 is connected to the CPU 22, the RTC 23, and the LSI 24 of the lamp control unit 2, respectively. Like the detection circuit 35, the control circuit 37 is in a normal state when the output signals of these devices are H signals. In the case of the L signal, the abnormal state is determined. The determination result thus determined is included in the first abnormality information S1 by the control circuit 37.

  When the control circuit 37 determines that all of the devices are in an abnormal state, the control circuit 37 determines whether the device is abnormal and supplies power to the device based on whether communication is possible with the CPU 22 of the lamp control unit 2 via the LAN 4. It is determined which of the abnormalities is abnormal. That is, the control circuit 37 determines that an abnormality has occurred in all of the devices when communication with the CPU 22 is possible, and determines that power supply to the device is abnormal when communication with the CPU 22 is not possible. As the power supply abnormality, an abnormality of the voltage conversion circuit 21 or an abnormality of the input voltage of the voltage conversion circuit 21 can be considered. The determination result thus determined is included in the first abnormality information S1 by the control circuit 37.

[Operation sequence when an abnormality occurs during power-saving operation]
FIG. 2 is a sequence diagram showing an operation when an abnormality occurs during the power saving operation in the traffic signal controller 1. During the power saving operation, the communication power supply unit 31 of the communication control unit 3 is stopped, the power supply to the control unit 36 is stopped, and the communication function between the control unit 36 and the central device 6 is cut off.

  In this state, if an abnormality occurs in at least one of the CPU 22, RTC 23, and LSI 24 in the lamp control unit 2 that is operating to control the turning on and off of the signal lamp, the abnormality has occurred. When the device outputs an abnormal signal (L signal), the detection circuit 35 of the communication control unit 3 detects that the device constituting the lamp control unit 2 is in an abnormal state. The detection circuit 35 that has detected the abnormal state outputs an activation signal to the power supply control circuit 34 of the communication power supply unit 31. Upon receipt of the activation signal, the power supply control circuit 34 activates its own circuit and outputs an activation signal to the main power supply 32 to activate the main power supply 32. The activated main power supply 32 supplies a DC voltage to the control circuit 37 and the communication device 38 of the control unit 36.

  The control circuit 37 of the control unit 36 supplied with the voltage collects information from the lamp control unit 2 and generates the first abnormality information S1. First, the control circuit 37 determines a device in an abnormal state depending on whether or not an abnormal signal is output from any of the CPU 22, RTC 23, and LSI 24 of the lamp control unit 2. If all of these devices are determined to be in an abnormal state, based on whether communication is possible with the CPU 22 of the lamp control unit 2 via the LAN 4, whichever of the device abnormality and the power supply abnormality to the device is detected. Determine if it is abnormal. The control circuit 37 includes the collection result and the determination result thus collected and determined in the first abnormality information S1. The first abnormality information S1 is transmitted to the central apparatus 6 by the communication device 38 of the control unit 36.

  As described above, according to the traffic signal controller 1 according to the embodiment of the present invention, when an abnormality occurs in the lamp control unit 2 while the communication power supply unit 31 is stopped and the power saving operation is performed, the detection circuit 35 is detected. The communication power supply unit 31 can be activated by detecting the abnormality. Thereby, since the control part 36 is electrically fed by the communication power supply part 31, it can transmit the 1st abnormality information S1 (information that abnormality has generate | occur | produced in the lamp control part 2) to the central apparatus 6 rapidly. . As a result, repair and failure analysis of the lamp control unit 2 can be performed quickly, so that the occurrence of traffic congestion can be effectively suppressed.

  In addition, when power is supplied during the power saving operation, the control circuit 37 of the control unit 36 collects whether or not an abnormality has occurred in the device constituting the lamp control unit 2 from the device, thereby causing the first abnormality. Information S1 is generated. Therefore, based on the first abnormality information S1 transmitted from the communication device 38 of the control unit 36 to the central device 6, it becomes easy to identify the device in which the abnormality has occurred in the lamp control unit 2, and the lamp control unit 2 repair and failure analysis can be performed more quickly.

  Further, the control circuit 37 of the control unit 36 determines whether the device can communicate with the CPU 22 of the lamp control unit 2 when abnormality has occurred in all the devices constituting the lamp control unit 2. And the abnormality of power feeding to the device are determined, and the determination result is included in the first abnormality information S1 of the lamp control unit 2. Therefore, based on the first abnormality information S1 transmitted from the communication device 38 of the control unit 36 to the central device 6, it is easy to identify whether the device constituting the lamp control unit 2 is abnormal or the power supply to the device is abnormal. Thus, repair and failure analysis of the lamp control unit 2 can be performed more quickly.

[Second Embodiment]
FIG. 3 is a block diagram showing a configuration example of a traffic signal controller according to the second embodiment of the present invention. The traffic signal controller 1 of this embodiment is different from that of the first embodiment in that the communication control unit 3 includes a sub power source 33 and a power storage unit 39. Hereinafter, the difference will be described in detail. Note that the other configuration of the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

  The communication power supply unit 31 of the communication control unit 3 of the present embodiment includes a slave power supply 33 that is supplied with a voltage from a main power supply 32, and a control circuit 37 and a communication device 38 of the control unit 36 are connected to the slave power supply 33. ing. The sub power supply 33 includes a DC / DC conversion circuit that converts the input voltage (5 V) input from the main power supply 32 into a predetermined output voltage corresponding to the control circuit 37 and the communication device 38. Therefore, the control circuit 37 and the communication device 38 are normally operated by being supplied with a voltage from the main power supply 32 via the sub power supply 33. Further, the sub power supply 33 is stopped together with the main power supply 32 during the power saving operation.

  The communication control unit 3 further includes a power storage unit 39 connected to a DC power source. The power storage unit 39 includes a capacitor formed of, for example, an electric double layer capacitor, and supplies a voltage to the sub power source 33 when an abnormality occurs in the communication power source unit 31. Specifically, the power storage unit 39 detects an abnormality in the input voltage to the main power supply 32 and an abnormality in the main power supply 32 based on an abnormality signal output from the main power supply 32, and responds to the sub power supply 33 based on the detection. DC voltage (5V) is supplied. Thereby, when an abnormality occurs in the lamp control unit 2 during the power saving operation, if the main power source 32 does not start up due to the abnormality, the power storage unit 39 directly connects the sub power source 33 without passing through the main power source 32. By starting, a voltage can be supplied to the controller 36.

  Furthermore, when the power supply unit 39 activates the sub power supply 33 and the control unit 36 operates, the power storage unit 39 transmits information (second abnormality information) S2 indicating that an abnormality has occurred in the communication power supply unit 31 to the control circuit 37 of the control unit 36. To do. The second abnormality information S <b> 2 includes information regarding an abnormality in the input voltage to the main power supply 32 and an abnormality in the main power supply 32. The control unit 36 generates the first abnormality information S <b> 1 in the control circuit 37, and then transmits the first and second abnormality information S <b> 1 and S <b> 2 from the communication device 38 to the central device 6. As described above, since the power storage unit 39 is used only in an emergency, the control device 37 and the communication device 38 of the control unit 36 are operated via the sub power source 33 and then the first and second abnormalities are detected in the central device 6. The minimum electric power required until the information S1 and S2 are transmitted is stored.

  FIG. 4 is a sequence diagram showing an operation when an abnormality occurs during the power saving operation in the traffic signal controller 1 of the present embodiment. When the main power supply 32 starts normally when an abnormality occurs in the lamp control unit 2 during the power saving operation, except that the main power supply 32 supplies voltage to the control unit 36 via the sub power supply 33. Since this is the same as the operation sequence of the first embodiment (see FIG. 2), description thereof is omitted. On the other hand, when an abnormality occurs in the lamp control unit 2 during the power saving operation, if an abnormality in the input voltage to the main power supply 32 and an abnormality in the main power supply 32 occur, the operation is as follows.

  When an abnormality occurs in at least one of the CPU 22, RTC 23, and LSI 24 in the lamp control unit 2 that is operating to control the lighting and extinction of the signal lamp, the detection circuit 35 of the communication control unit 3 The abnormality is detected and the power supply control circuit 34 is activated, and the activated power supply control circuit 34 outputs an activation signal to the main power supply 32. At that time, since the main power supply 32 remains stopped due to the occurrence of an abnormality, the power storage unit 39 detects an abnormality signal from the main power supply 32 and starts supplying a DC voltage to the sub power supply 33. The voltage-supplied slave power supply 33 supplies a DC voltage to the control circuit 37 and the communication device 38 of the control unit 36.

  In addition, when the control circuit 37 of the control unit 36 operates, the power storage unit 39 transmits second abnormality information S <b> 2 regarding the abnormality of the input voltage to the main power supply 32 and the abnormality of the main power supply 32 to the control circuit 37. The control circuit 37 temporarily stores the second abnormality information S2, and collects and determines information from the lamp control unit 2 to generate the first abnormality information S1 as in the first embodiment. The generated first abnormality information S1 is transmitted to the central apparatus 6 by the communication device 38 together with the second abnormality information S2.

  As described above, according to the traffic signal controller 1 according to the present embodiment, the communication control unit 3 includes the power storage unit 39 that supplies power to the communication power supply unit 31 when an abnormality of the communication power supply unit 31 is detected. 2, even if power cannot be supplied to the control unit 36 due to an abnormality in the communication power supply unit 31, power can be supplied to the control unit 36 using the power storage unit 39. As a result, information indicating that an abnormality has occurred in the lamp control unit 2 can be reliably transmitted to the central device 6.

  Further, the control unit 36 collects the second abnormality information S2 (information indicating that an abnormality has occurred in the communication power supply unit 31) from the power storage unit 39, and transmits the collected second abnormality information S2 to the central device 6. Since it is possible to quickly grasp that an abnormality has occurred in the communication power supply unit 31 of the communication control unit 3 based on the second abnormality information S2, the communication control unit 3 can be repaired and analyzed quickly. .

[Third Embodiment]
FIG. 5 is a block diagram showing a configuration example of a traffic signal controller according to the third embodiment of the present invention. The traffic signal controller 1 of the present embodiment is different from the first embodiment in that the communication control unit 3 includes a power storage unit 39. Hereinafter, the difference will be described in detail. Note that the other configuration of the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

  The communication control unit 3 of this embodiment includes a power storage unit 39 connected to a DC power source. The power storage unit 39 includes a storage battery such as a battery, and supplies a voltage to the main power supply 32 when an abnormality occurs in the communication power supply unit 31. Specifically, the power storage unit 39 detects an abnormality in the input voltage to the main power supply 32 based on an abnormality signal output from the main power supply 32, and supplies a DC voltage (12V) to the main power supply 32 based on the detection. To do. The power storage unit 39 outputs an instruction signal for starting the main power supply 32 to the power supply control circuit 34. Thereby, when an abnormality occurs in the lamp control unit 2 during the power saving operation, if the main power source 32 is not activated due to an abnormality in the input voltage, the main power source 32 is activated by the power storage unit 39, A voltage can be supplied to the controller 36.

  Further, when the main power supply 32 is activated and the control unit 36 operates, the power storage unit 39 transmits information (second abnormality information) S2 indicating that an abnormality has occurred in the communication power supply unit 31 to the control circuit 37 of the control unit 36. To do. The second abnormality information S2 includes information related to an abnormality in the input voltage to the main power supply 32. The control unit 36 generates the first abnormality information S <b> 1 in the control circuit 37, and then transmits the first and second abnormality information S <b> 1 and S <b> 2 from the communication device 38 to the central device 6. Since the power storage unit 39 of the present embodiment is used only in an emergency as in the second embodiment, the voltage is supplied to the main power supply 32 and the control circuit 37 and the communication device 38 of the control unit 36 are operated. The minimum electric power necessary for transmitting the first and second abnormality information S1 and S2 to the central device 6 is stored.

  FIG. 6 is a sequence diagram showing an operation when an abnormality occurs during the power saving operation in the traffic signal controller 1 of the present embodiment. When an abnormality occurs in the lamp control unit 2 during power saving operation, when the main power supply 32 starts normally, it is the same as the operation sequence of the first embodiment (see FIG. 2). Is omitted. On the other hand, when an abnormality occurs in the lamp control unit 2 during the power saving operation, if an abnormality occurs in the input voltage to the main power supply 32, the following operation is performed.

  When an abnormality occurs in at least one of the CPU 22, RTC 23, and LSI 24 in the lamp control unit 2 that is operating to control the lighting and extinction of the signal lamp, the detection circuit 35 of the communication control unit 3 The abnormality is detected and the power supply control circuit 34 is activated, and the activated power supply control circuit 34 outputs an activation signal to the main power supply 32. At this time, since the main power supply 32 remains stopped due to the occurrence of an abnormality, the power storage unit 39 detects an abnormality signal from the main power supply 32 and starts supplying a DC voltage to the main power supply 32. In addition, the power storage unit 39 outputs an instruction signal for starting the main power supply 32 to the power supply control circuit 34 after supplying the voltage to the main power supply 32. Upon receiving this instruction signal, the power supply control circuit 34 outputs a start signal to the main power supply 32 to start the main power supply 32. The activated main power supply 32 supplies a DC voltage to the control circuit 37 and the communication device 38 of the control unit 36.

  Further, when the control circuit 37 of the control unit 36 operates, the power storage unit 39 transmits the second abnormality information S <b> 2 regarding the abnormality of the input voltage to the main power supply 32 to the control circuit 37. The control circuit 37 temporarily stores the second abnormality information S2, and collects and determines information from the lamp control unit 2 to generate the first abnormality information S1 as in the first embodiment. The generated first abnormality information S1 is transmitted to the central apparatus 6 by the communication device 38 together with the second abnormality information S2.

  As described above, also in the traffic signal controller 1 according to the present embodiment, the communication control unit 3 includes the power storage unit 39 that supplies power to the communication power supply unit 31 when an abnormality of the communication power supply unit 31 is detected. Even when an abnormality occurs in the communication power supply unit 31, even if it is not possible to supply power to the control unit 36, it is possible to supply power to the control unit 36 using the power storage unit 39. As a result, information indicating that an abnormality has occurred in the lamp control unit 2 can be reliably transmitted to the central device 6.

  Further, the control unit 36 collects the second abnormality information S2 (information indicating that an abnormality has occurred in the communication power supply unit 31) from the power storage unit 39, and transmits the collected second abnormality information S2 to the central device 6. Since it is possible to quickly grasp that an abnormality has occurred in the communication power supply unit 31 of the communication control unit 3 based on the second abnormality information S2, the communication control unit 3 can be repaired and analyzed quickly. .

[Other variations]
The above-mentioned embodiment is an illustration and does not limit the scope of the present invention. The scope of the present invention is indicated by the scope of claims for patent, and all modifications within the scope equivalent to the structure of the claims for patent are included in the present invention.
For example, the detection circuit 35 in the above embodiment detects whether or not an abnormality has occurred in the three devices of the CPU 22, the RTC 23, and the LSI 24 of the lamp control unit 2, but constitutes the lamp control unit 2. You may detect about another apparatus. Moreover, the detection circuit 35 should just detect whether abnormality has generate | occur | produced in the at least 1 apparatus of the apparatuses which comprise the lamp control part 2. FIG.

  The control unit 36 collects information on whether or not an abnormality has occurred from the three devices of the CPU 22, the RTC 23, and the LSI 24 of the lamp control unit 2. The information may be collected from the device. Moreover, the control part 36 should just collect the said information from at least 1 apparatus.

Furthermore, the control unit 36 includes a collection result obtained by collecting information from the devices constituting the lamp control unit 2 and a determination result for determining which of the abnormality of the device and the abnormality of the power supply to the device. Although it is included in the first abnormality information S1, it may be individually transmitted to the central device 6 without being included in the first abnormality information S1.
Further, the control unit 36 collects the first abnormality information S1 including only the information on the abnormality of the lamp control unit 2 without collecting and determining information from the devices constituting the lamp control unit 2, and the central device 6 You may make it transmit to.

DESCRIPTION OF SYMBOLS 1 Traffic signal controller 2 Lamp control part 3 Communication control part 6 Central apparatus 31 Communication power supply part 35 Detection circuit 36 Control part 39 Power storage part

Claims (5)

A lamp control unit that controls turning on and off of the signal lamp;
A control unit that transmits information indicating that an abnormality has occurred in the lamp control unit to a central device, and a communication control unit that includes a communication power supply unit that supplies power to the control unit, and stops the communication power supply unit. A traffic signal controller that performs power-saving operation,
The communication control unit includes a detection circuit that detects an abnormality of the lamp control unit during the power saving operation and outputs a start command for starting the communication power supply unit to the communication power supply unit based on the detection. A traffic signal controller characterized by that.   When power is supplied during the power saving operation, the control unit collects from the device whether or not an abnormality has occurred in the device constituting the lamp control unit, and transmits the collection result to the central device. The traffic signal controller according to claim 1. The lamp control unit can communicate with the control unit,
When the abnormality occurs in all of the devices, the control unit determines which one of the abnormality of the device and the abnormality of power supply to the device based on whether or not communication with the lamp control unit is possible. The traffic signal controller according to claim 2, wherein the traffic signal controller transmits the determination result to the central device.   The traffic signal controller according to any one of claims 1 to 3, wherein the communication control unit includes a power storage unit that detects an abnormality of the communication power supply unit and supplies power to the communication power supply unit based on the detection.   The traffic signal controller according to claim 4, wherein the control unit collects information indicating that an abnormality has occurred in the communication power supply unit from the power storage unit, and transmits the collected information to the central device.

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