JP2008090738A - Traffic signal control system, traffic signal control unit, light unit drive equipment, and signal light unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traffic signal control system, traffic signal control unit, and light unit driver capable of controlling the signal light unit by means of a plurality of traffic signal control units, preventing a situation incapable of controlling the signal light unit, and dramatically improving the reliability of controlling the signal light unit as compared to the conventional method, and signal light unit therefor. <P>SOLUTION: A main traffic signal control unit 100 and a sub-traffic signal control unit 110 respectively output identifiers and signal light unit output commands to each light unit drive 200 through a network 50. Each light unit drive 200 accepts the signal light unit output command which is output from the main traffic signal control unit 100 having the highest identifier priority. When a failure occurs in the main traffic signal control unit 100, making it impossible to output the identifier and the signal light unit output command, each light unit drive 200 drives a signal light unit 3, based on the signal light unit output command which is output from the sub-traffic signal control unit 110 identified by the identifier having a second highest priority. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a traffic signal control system for controlling lighting or extinguishing of a signal lamp, a traffic signal controller and a lamp driving device constituting the traffic signal control system, and a signal lamp including the lamp driving device.

  At intersections and pedestrian crossings, multiple signal lamps are installed at predetermined positions to ensure safe traffic for vehicles, pedestrians, etc. Blue lights, yellow lights, red lights, blue arrow lights, etc. A traffic signal control system that controls lighting, extinguishing, or blinking of a signal to repeat at predetermined time intervals has already been put into practical use, and technical development related to the traffic signal control system has been carried out along with recent technological advances. .

  Such a traffic signal control system is composed of a plurality of signal lamps, a traffic signal controller equipped with a control unit and an SSU (solid state relay unit, lamp drive unit), etc. The control unit of the traffic signal controller drives each color lamp of the signal lamp based on the command plan output from the central device installed in the traffic signal controller to the traffic signal controller and the predetermined information held by the traffic signal controller. The timing is determined and a signal lamp output command is output to the SSU. The SSU outputs a drive signal to the signal lamp based on the signal lamp output command.

  FIG. 14 is a schematic diagram showing an example of the configuration of a conventional traffic signal control system, and FIG. 15 is a block diagram showing the configuration of a conventional SSU 510. The conventional traffic signal control system is, for example, a traffic signal controller 500 that controls lighting, extinguishing, blinking, etc. of the signal lamp 3 installed on a pillar installed at a predetermined position of an intersection. Etc. The traffic signal controller 500 is installed, for example, in the vicinity of one of the columns on which the signal lamp 3 is installed, and is connected to the commercial power source 1 (for example, AC 100 V), and the signal lamp 3 is turned on / off. Or a control unit 501 for outputting a signal lamp output command for performing control such as blinking, a communication unit 502 for performing communication with the outside (for example, a central device installed in a traffic control center or the like), a signal lamp Interface unit 503 for outputting a unit output command to each SSU 510, a power source unit 504 for supplying a required DC voltage therein, SSUs 510 corresponding to each signal lamp unit 3, and the like. Note that the communication unit 502 may not be mounted on a traffic signal controller of a type that operates alone.

  The SSU 510 includes semiconductor relays 513, 513, and 513 for turning on / off the AC 100V supplied from the commercial power source 1, and each of the semiconductor relays 513 is based on the signal lamp output command acquired by the interface unit 511. The AC 100 V supplied to each of the red light, blue light, and yellow light is turned on / off. Thereby, a lamp drive signal (AC drive signal) is output from each SSU 510 through the drive line 5. The voltage detection unit 512 detects the presence or absence of AC 100 V supplied to each of the red light, blue light, and yellow light of the signal lamp device 3, and the detection result is output to the control unit 501 through the interface unit 511.

In addition, when the traffic signal system must be installed in a mountainous area away from the commercial power supply area, it is equipped with a solar cell and a power storage unit, which suppresses the brightness of the signal lamp at night and stores it in the daytime. A highly reliable power supply independent traffic signal system that does not require external power supply by suppressing the luminance of the signal lamp according to the stored power of the battery and the generated power of the solar cell has also been proposed (Patent Literature) 1).
JP 2006-146295 A

  In the traffic signal system of Patent Document 1, a traffic signal system with high reliability can be provided in an area where commercial power is not supplied, but traffic is supplied to commercial power supply areas such as urban areas, urban areas, and suburbs. In the case of installing a signal controller, power supply from a commercial power source is presupposed in advance, and a conventional traffic signal control system is often used rather than a self-supporting traffic signal system.

  However, in the conventional traffic signal control system, since one traffic signal controller controls a plurality of signal lamps, if the traffic signal controller breaks down for some reason, There is a problem in that it becomes impossible to control, and it is impossible to secure safe traffic such as a vehicle passing through an intersection or a pedestrian crossing a pedestrian crossing. In addition, when the traffic signal controller breaks down, it is desired that the restoration work be completed quickly.

  The present invention has been made in view of such circumstances, and enables control of a signal lamp with a plurality of traffic signal controllers, prevents a situation in which the control of the signal lamp is disabled, and prevents the control of the signal lamp. To provide a traffic signal control system capable of dramatically improving the reliability compared to the prior art, a traffic signal controller and a lamp driving device constituting the traffic signal control system, and a signal lamp equipped with the lamp driving device. With the goal.

  A traffic signal control system according to a first aspect of the present invention includes a plurality of lamp driving devices that drive a signal lamp, and a plurality of traffic signal controllers that control the lamp driving device to turn on or off the signal lamp. In the traffic signal control system, each of the traffic signal controllers is configured so as to be able to control each lamp driving device, and is provided with identification means for identifying each traffic signal controller, and the provision means Selecting means for selecting one identification information from the identified identification information, and configured to control each lamp driving device with a traffic signal controller identified by the identification information selected by the selection means. It is characterized by being.

  A traffic signal control system according to a second invention is the traffic signal control system according to the first invention, wherein the traffic signal controller outputs identification information for identifying itself and a control signal for controlling each lamp driving device to each lamp driving device. The lamp driving device includes: storage means for storing the priority order of the identification information; acquisition means for acquiring the identification information output by each traffic signal controller; and most of the identification information acquired by the acquisition means. Receiving means for receiving a control signal output by the traffic signal controller identified by the identification information having a high priority, and configured to drive the signal lamp based on the control signal received by the receiving means. It is characterized by.

  The traffic signal control system according to a third aspect of the present invention is the traffic signal control system according to the first aspect, wherein the traffic signal controller stores means for outputting identification information for identifying itself to other traffic signal controllers and a priority order of the identification information. Each of the lamp driving devices when the storage means, the acquisition means for acquiring the identification information output by another traffic signal controller, and the priority of the identification information of the own is higher than the priority of the identification information acquired by the acquisition means Means for outputting a control signal for controlling the lamp, and the lamp driving device is configured to drive the signal lamp based on the control signal.

  A traffic signal control system according to a fourth aspect of the present invention comprises the monitoring device for monitoring the operation of each traffic signal controller in the first invention, and the monitoring device sets the priority of the identification information for identifying each traffic signal controller. Storage means for storing, acquisition means for acquiring identification information of each traffic signal controller, and an operation permission signal to the traffic signal controller identified by the identification information having the highest priority among the identification information acquired by the acquisition means The traffic signal controller is configured to output identification information for identifying itself to the monitoring device, a reception unit that receives the operation permission signal, and a reception unit that receives the operation permission signal. A means for outputting a control signal for controlling each lamp driving device.

  A traffic signal control system according to a fifth aspect of the present invention is the traffic light control system according to any one of the second to fourth aspects, wherein the lamp driving device and the traffic signal controller include wireless communication means for communicating the control signal wirelessly. And

  A traffic signal controller according to a sixth aspect of the present invention is a traffic signal controller that controls a lamp driving device that drives a signal lamp to turn on / off the signal lamp, and includes means for outputting identification information for identifying itself. It is characterized by that.

  A lamp driving device according to a seventh aspect of the present invention is a lamp driving device for driving a signal lamp, in which storage means for storing priority of identification information for identifying a traffic signal controller, acquisition means for acquiring identification information, Receiving means for receiving a control signal output by the traffic signal controller identified by the identification information having the highest priority among the identification information acquired by the acquiring means, and a signal lamp based on the control signal received by the receiving means The apparatus is configured to drive the device.

  A signal lamp device according to an eighth aspect of the present invention includes the lamp driving device according to the above-described invention.

  In the first invention, each of the plurality of traffic signal controllers is configured to control each lamp driving device. The assigning means assigns identification information for identifying each traffic signal controller, and the selecting means selects one identification information from the assigned identification information. For example, when a failure occurs in one traffic signal controller that has controlled the lamp driving device, the selecting means removes the identification information of the failed traffic signal controller from the assigned identification information. Select identification information. Each lamp driving device is controlled by another traffic signal controller identified by the one identification information selected by the selection means. In other words, by identifying each of a plurality of traffic signal controllers with identification information, the lamp drive device can be controlled by one of the plurality of traffic signal controllers, and when one traffic signal controller fails Even so, it is possible to control the lamp drive device with another traffic signal controller, preventing the situation where the control of the signal lamp becomes impossible, and the reliability of the control of the signal lamp is dramatically higher than before. Can be improved.

  In the second invention, the sixth invention, the seventh invention and the eighth invention, the traffic signal controller sends identification information for identifying itself and a control signal for controlling each lamp driving device to each lamp driving device. Output. Each lamp driving device stores the priority of the identification information, acquires the identification information output by each traffic signal controller, and is identified by the identification information with the highest priority among the acquired identification information. A control signal output from the signal controller is received, and the signal lamp is driven based on the received control signal. For example, the identification information of the main traffic signal controller (hereinafter referred to as “main traffic signal controller”) and the subordinate traffic signal controller (hereinafter referred to as “sub traffic signal controller”) is “0001” and “0002”, respectively. The priority of the identification information “0001” stored in each lamp driving device is set highest, and the priority of the identification information “0002” is set next. When each of the main traffic signal controller and the secondary traffic signal controller outputs a control signal to each lamp driving device, each lamp driving device is identified by the identification information “0001” having the highest priority. The signal lamp is driven based on the control signal output from the controller.

  In this case, when a failure occurs in the main traffic signal controller and the identification information and the control signal cannot be output, the identification information received by each lamp driving device is the identification information “0002” output by the slave traffic signal controller. And the identification information “0002” has the highest priority, and each lamp driving device is a slave traffic signal controller identified by the identification information “0002”. The signal lamp is driven on the basis of the control signal output by. As a result, even if the main traffic signal controller fails and the lamp drive device cannot be controlled, the slave traffic signal controller controls each lamp drive device instead of the main traffic signal controller. It can be performed continuously without stopping the lighting or extinguishing of the signal lamp.

  In the third invention, the traffic signal controller stores the priority order of the identification information, and outputs the identification information for identifying itself to the other traffic signal controller. The output identification information is acquired, and when the priority of the identification information of itself is higher than the priority of the acquired identification information, a control signal for controlling each lamp driving device is output. Each lamp driving device drives the signal lamp based on the control signal output by the traffic signal controller. For example, the identification information of the main traffic signal controller and the sub traffic signal controller is “0001” and “0002”, respectively, and the priority of the identification information “0001” stored in each traffic signal controller is the highest. The priority of “0002” is set next. The main traffic signal controller outputs its own identification information “0001” to the sub traffic signal controller, and the sub traffic signal controller outputs its own identification information “0002” to the main traffic signal controller. Since the priority of its own identification information “0001” is higher than the priority of the acquired identification information “0002”, the main traffic signal controller outputs a control signal for controlling each lamp driving device. Thereby, each lamp drive device drives a signal lamp based on the control signal which the main traffic signal controller output.

  In this case, when a failure occurs in the main traffic signal controller and the identification information cannot be output, the slave traffic signal controller does not accept the identification information “0001”. Has the highest priority and outputs a control signal for controlling each lamp driving device. Each lamp driving device drives the signal lamp based on the control signal output from the slave traffic signal controller. As a result, even if the main traffic signal controller fails and the lamp drive device cannot be controlled, the slave traffic signal controller controls each lamp drive device instead of the main traffic signal controller. It can be performed continuously without stopping the lighting or extinguishing of the signal lamp.

  In the fourth invention, each traffic signal controller outputs identification information for identifying itself to a monitoring device that monitors the operation of each traffic signal controller. The monitoring device stores the priority of identification information for identifying each traffic signal controller, acquires the identification information of each traffic signal controller, and identifies the identification information with the highest priority among the acquired identification information. The operation permission signal is output to the traffic signal controller. When the traffic signal controller receives an operation permission signal, the traffic signal controller outputs a control signal for controlling each lamp driving device. For example, the identification information of the main traffic signal controller and the sub traffic signal controller is set to “0001” and “0002”, respectively, and the priority of the identification information “0001” stored in the monitoring device is set highest, and the identification information “0002” is stored. Is set next. The main traffic signal controller outputs its own identification information “0001” to the monitoring device, and the slave traffic signal controller outputs its own identification information “0002” to the monitoring device. Since the priority of the identification information “0001” is higher than the priority of the identification information “0002”, the monitoring device outputs an operation permission signal to the main traffic signal controller. Thereby, the main traffic signal controller outputs a control signal to each lamp driving device, and each lamp driving device drives the signal lamp based on the control signal output by the main traffic signal controller.

  In this case, when a failure occurs in the main traffic signal controller and the identification information cannot be output, the monitoring device does not accept the identification information “0001”. Therefore, the identification information “0002” has the highest priority. It becomes high and outputs an operation permission signal to the secondary traffic signal controller. The slave traffic signal controller outputs a control signal to each lamp driving device, and each lamp driver drives the signal lamp based on the control signal output by the slave traffic signal controller. As a result, even if the main traffic signal controller fails and the lamp drive device cannot be controlled, the slave traffic signal controller controls each lamp drive device instead of the main traffic signal controller. It can be performed continuously without stopping the lighting or extinguishing of the signal lamp.

  In the fifth invention, the lamp driving device and the traffic signal controller transmit and receive the control signal by wireless communication. As a result, for example, there is no need to perform signal line wiring work between the traffic signal controller and the lamp drive device across the intersection, and installation work can be facilitated. The influence of time can be reduced.

  In the present invention, it is possible to control the signal lamp with a plurality of traffic signal controllers, prevent the situation where the control of the signal lamp becomes impossible, and dramatically improve the reliability of control of the signal lamp. Can be improved.

Embodiment 1
Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof. FIG. 1 is a schematic diagram showing an example of the configuration of a traffic signal control system according to the present invention. The traffic signal control system of the present invention, for example, performs traffic signal control over a relatively wide range including a plurality of intersections, and sets signal lamps 3,... On columns (not shown) installed at predetermined positions at the four corners of each intersection. A lamp driving device 200 installed in the vicinity of each signal lamp 3,..., A main traffic signal controller 100 for controlling the lighting, extinction, or blinking of each signal lamp 3, a main traffic signal controller This is a traffic signal control system of a lamp type drive unit separation type network system in which a slave traffic signal controller 110 or the like that functions as a backup in the event of 100 failure is connected by a network 50.

  A commercial power source 1a is connected to the main traffic signal controller 100, a commercial power source 1b is connected to the slave traffic signal controller 110, and commercial power sources 2a, 2b,. ing. Each commercial power source 1a, 1b and commercial power source 2a, 2b,... May be the same system commercial power source distributed from the same transformer, or may be a different system commercial power source. It can be determined as appropriate according to the installation location of the instrument driving device 200.

  A central device (not shown) installed in a traffic control center or the like is connected to the main traffic signal controller 100 through a communication line. The secondary traffic signal controller 110 functioning as a backup may be configured to be connected to the central device, or may be configured not to be connected to the central device in order to simplify the configuration of the device.

  FIG. 2 is a block diagram illustrating an example of the configuration of the main traffic signal controller 100. The main traffic signal controller 100 includes a communication unit 101, a control unit 102, an interface unit 103, a storage unit 104, a power supply unit 105, and the like.

  The communication unit 101 receives a command plan related to traffic signal control from a central device (not shown), and executes signal control including information on the time when the signal lamp 3 acquired by the main traffic signal controller 100 is controlled to be turned on / off. A communication function for transmitting information to the central device is provided. The command plan includes information such as signal control parameters (for example, cycle, split, offset, etc.), and is appropriately transmitted to the main traffic signal controller 100 by the central device, and the main traffic signal controller 100 receives the latest command. Each signal lamp 3 can be controlled based on the plan.

  The control unit 102 stores the command plan 104 b received by the communication unit 101 in the storage unit 104. As a result, the latest command plan is always maintained.

  The storage unit 104 stores an identifier 104a (for example, “0001”) for identifying the main traffic signal controller 100 together with the received command plan 104b.

  Based on the received command plan 104 b, the control unit 102 generates a signal lamp output command (control signal) for performing control such as lighting, extinguishing, blinking, etc. of each signal lamp 3, and transmits itself through the interface unit 103. Together with the identifier 104a to be identified, the generated signal lamp output command is converted into communication data of a predetermined format and output to each lamp driving device 200.

  FIG. 3 is an explanatory diagram showing an example of communication data. As shown in the figure, communication data is represented in a data format including a header part, an identifier, a command content, a footer part, and the like. The header portion stores information indicating the start of communication data, for example. The identifier is identification information (for example, “0000”, “0001”, “0002”,...) Unique to a controller such as the main traffic signal controller 100 and the slave traffic signal controller 110. The command content is specified by, for example, a 4-bit bit string, and according to the bit string, a blue output command for a vehicle signal lamp, a yellow output command for a vehicle signal lamp, a red output command for a vehicle signal lamp, etc. It is. The footer unit stores, for example, information indicating the end of communication data. The data format of the communication data is an example and is not limited to this. A similar data format is used for the signal lamp output detection signal output from the lamp driving device 200 to the main traffic signal controller 100.

  The interface unit 103 has a function of transmitting / receiving data to / from each lamp driving device 200 through the network 50.

  Note that the interface unit 103 is not limited to a wired communication method, and may be a wireless communication method. In this case, the interface unit 103 includes, on the transmission side, an encoding circuit that encodes a signal (for example, a control signal) to be transmitted to each lamp driving device 200, a modulation circuit that modulates the encoded data, and a modulation circuit. And a filter for transmitting the signal modulated in the above in a predetermined communication band (for example, 2.4 GHz band). On the receiving side, a signal in a predetermined communication band is received from the signal received from each lamp driving device 200. A filter for extraction, a demodulation circuit for demodulating the received signal, a decoding circuit for decoding data demodulated by the demodulation circuit, and the like are provided.

  The power source unit 105 includes an AC / DC power source unit (not shown) that rectifies AC 100V AC supplied from the commercial power source 1a into DC and generates a predetermined DC voltage. The AC / DC power source unit is a communication unit. 101, a control unit 102, an interface unit 103, and a storage unit 104 are configured to supply a DC voltage. In addition, it is set as the structure provided with a battery in the power supply part 105, and when commercial power supply 1a is interrupted | blocked, it can replace with AC100V and can supply the direct current | flow of a battery to each part.

  The secondary traffic signal controller 110 has the same configuration as the primary traffic signal controller 100. Note that an identifier (for example, “0002”) different from the identifier of the main traffic signal controller 100 is set as the identifier for identifying the slave traffic signal controller 110.

  With the above configuration, each of the main traffic signal controller 100 and the secondary traffic signal controller 110 outputs an identifier and a control signal (signal lamp output command) to each lamp driving device 200 through the network 50.

  FIG. 4 is a block diagram illustrating an example of the configuration of the lamp driving device 200. The lamp driving device 200 includes an interface unit 201, an identifier determination unit 202, a storage unit 203, a power supply unit 204, a semiconductor relay 205,..., A voltage detection unit 206, and the like.

  The interface unit 201 receives data including identifiers and signal lamp output commands (control signals) output from the main traffic signal controller 100 and the secondary traffic signal controller 110, and extracts and extracts each identifier from the received data. The identifier is output to the identifier determination unit 202.

  As will be described later, when the interface unit 201 receives a reception enable signal from the identifier determination unit 202, the interface unit 201 extracts a signal lamp output command from the received data, and based on the extracted signal lamp output command, the signal lamp 3 A drive signal for driving is generated and output to each semiconductor relay 205.

  Further, as will be described later, when receiving a reception disable signal from the identifier determination unit 202, the interface unit 201 invalidates the received data and discards the received data.

  Note that the interface unit 201 is not limited to the wired communication method, and may be a wireless communication method. In this case, the interface unit 201 includes, on the transmission side, an encoding circuit that encodes a signal to be transmitted to the main traffic signal controller 100 or the slave traffic signal controller 110, a modulation circuit that modulates the encoded data, A signal for transmitting a signal modulated by the circuit in a predetermined communication band (for example, 2.4 GHz band) is provided, and a signal received from the main traffic signal controller 100 and the secondary traffic signal controller 110 on the receiving side. Are provided with a filter for extracting a signal in a predetermined communication band, a demodulation circuit for demodulating the received signal, a decoding circuit for decoding data demodulated by the demodulation circuit, and the like. Thereby, for example, there is no need to perform signal line wiring work between the main traffic signal controller 100 and the secondary traffic signal controller 110 and each lamp driving device 200 across the intersection, and installation work is facilitated. It is possible to reduce the influence at the time of disaster such as disconnection of wiring.

  The storage unit 203 stores a priority table 203a. The priority order table 203a associates priorities with identifiers of controllers such as the main traffic signal controller 100 and the sub traffic signal controller 110. For example, the highest priority “1” has the identifier “0000”, the next highest priority “2” has the identifier “0001”, and the next highest priority. The rank “3” has an identifier “0002”. The same applies hereinafter. The identifier “0000” will be described later.

  Based on the identifier input from the interface unit 201, the identifier determination unit 202 refers to the priority table 203a stored in the storage unit 203 and determines the identifier having the highest priority. In this case, the identifier determination unit 202 acquires the identifiers “0001” and “0002”, and thus determines that the identifier “0001” is the highest priority identifier.

  The identifier determination unit 202 outputs a reception enable signal in association with the highest priority identifier “0001” to the interface unit 201, and cannot be received in association with another identifier (in this case, the identifier “0002”). The signal is output to the interface unit 201.

  Thereby, in the lamp drive device 200, among the signal lamp output commands output by the main traffic signal controller 100 and the secondary traffic signal controller 110, the signal lamp output command output by the main traffic signal controller 100 is received. The signal lamp output command output from the secondary traffic signal controller 110 is discarded.

  The power supply unit 204 outputs AC100V input from the commercial power supply 2a to the semiconductor relays 205,.

  Each semiconductor relay 205 is for turning on / off AC100V supplied from the commercial power source 2a. Each semiconductor relay 205 turns on / off AC 100 V supplied to each of the red light, blue light, and yellow light of the signal light device 3 based on the drive signal input from the interface unit 201, thereby transmitting the drive signal to the signal light device. Output to 3.

  The voltage detection unit 206 detects the presence or absence of AC 100 V supplied to each of the red lamp, the blue lamp, and the yellow lamp of the signal lamp device 3 and outputs a detection result (signal lamp output detection signal) to the interface unit 201. The voltage detected by the voltage detection unit 206 may be configured to detect only the presence or absence of AC100V supplied to the blue lamp.

  In addition, the power supply unit 204 includes an AC / DC conversion circuit, converts the alternating current of the commercial power supply 2a into direct current, and supplies the converted direct current to the semiconductor relays 205,. it can.

  Next, the operation of the traffic signal control system of the present invention will be described. As described above, the main traffic signal controller 100 and the secondary traffic signal controller 110 each output an identifier and a signal lamp output command to each lamp driving device 200 through the network 50. Among the signal lamp output commands output by the traffic signal controller 100 and the slave traffic signal controller 110, the signal lamp output command output by the master traffic signal controller 100 having the highest identifier priority is received, and the slave traffic signal The signal lamp output command output from the controller 110 is discarded.

  In this case, when a failure occurs in the main traffic signal controller 100 and the identifier and the signal lamp output command cannot be output, the identifier received by each lamp driving device 200 is the identifier output by the slave traffic signal controller 110. Since “0002” is not received and the identifier “0001” is not received, the identifier “0002” has the highest priority, and each lamp driving device 200 is identified as a slave traffic signal controller identified by the identifier “0002”. The signal lamp 3 is driven based on the signal lamp output command output by 110. When the main traffic signal controller 100 returns, the slave traffic signal controller 110 stops outputting the signal lamp output command, and the main traffic signal controller 100 restarts outputting the signal lamp output command.

  As a result, even if the main traffic signal controller 100 is out of order and the signal lamp output command cannot be output to each lamp driving device 200 and the control of the signal lamp 3 becomes impossible, the secondary traffic signal control The machine 110 can output the signal lamp output command to each lamp driving device 200 in place of the main traffic signal controller 100 to control the signal lamp 3, and can continue without stopping the lighting or extinguishing of the signal lamp 3. Can be done.

  Further, the timing of switching from the main traffic signal controller 100 to the slave traffic signal controller 110 is configured such that, for example, the signal lights 3 at the intersection are switched in a red state (all red). Or it can switch safely in the state where the pedestrian has not passed the intersection or the pedestrian crossing.

  In addition, by applying the contents of the present invention, the maintenance work of the traffic signal control system can be easily performed without stopping the signal lamp 3. In this case, the maintenance device is connected to the network 50 when performing maintenance work.

  FIG. 5 is a block diagram illustrating an example of the configuration of the maintenance device 300. The maintenance device 300 includes a control unit 302, an interface unit 303, a storage unit 304, a power supply unit 305, and the like.

  The storage unit 304 stores an identifier 304a (for example, “0000”) for identifying the maintenance device 300, and when performing maintenance work on the main traffic signal controller 100 and the secondary traffic signal controller 110, the main traffic. Instead of the signal controller 100, a maintenance-time command plan 304b for controlling lighting or extinguishing of the signal lamp 3 is stored.

  When the maintenance device 300 is connected to the network 50, the control unit 302 performs a signal lamp output command for performing control such as lighting, extinction, and blinking of each signal lamp 3 based on the stored maintenance command plan 304b. (Control signal) is generated, and the generated signal lamp output command is converted into communication data of a predetermined format together with the identifier (“0000”) for identifying itself through the interface unit 303 and output to the lamp driving device 200. .

  Note that the interface unit 303 and the power supply unit 305 have the same functions as the interface unit 103 and the power supply unit 105, and thus description thereof is omitted.

  In each lamp driving device 200, the identifier determination unit 202 refers to the priority table 203a stored in the storage unit 203 based on the identifier input from the interface unit 201, and determines the identifier having the highest priority. . In this case, the identifier determination unit 202 acquires the identifier “0000”, the identifiers “0001”, and “0002” from the maintenance device 300, the main traffic signal controller 100, and the slave traffic signal controller 110, respectively. Is the identifier with the highest priority.

  The identifier determination unit 202 outputs a reception enable signal in association with the highest priority identifier “0000” to the interface unit 201 and other identifiers (in this case, identifier “0001” and identifier “0002”). The reception disable signal is output to the interface unit 201 in association with

  The lamp driving device 200 receives the signal lamp output command output from the maintenance device 300 among the signal lamp output commands output from the maintenance device 300, the main traffic signal controller 100, and the slave traffic signal controller 110, and The signal lamp output command output by the traffic signal controller 100 and the secondary traffic signal controller 110 is discarded. Thus, each lamp driving device 200 drives the signal lamp 3 based on the signal lamp output command output by the maintenance device 300 identified by the identifier “0000”.

  The operation of the main traffic signal controller 100 and the secondary traffic signal controller 110 is stopped while the lighting or extinguishing of each signal lamp 3 is being performed based on the signal lamp output command output by the maintenance device 300. Inspection and maintenance work can be performed.

  As described above, by applying the present invention, inspection and maintenance work of the main traffic signal controller 100 and the secondary traffic signal controller 110 can be performed without stopping the operation of each signal lamp 3, for example, There are no restrictions such as performing maintenance work at night when there is little traffic of vehicles, and it can be done when necessary, and even during maintenance work, vehicles passing through intersections or pedestrians crossing pedestrian crossings, etc. Secure traffic. Further, the maintenance work can be started simply by connecting the maintenance device 300 to the network 50, and the maintenance work becomes easy. In particular, when the secondary traffic signal controller 110 is not connected to the network 50 and each signal lamp 3 is controlled by one main traffic signal controller 100, the signal lamp 3 is turned on or off. Maintenance of the main traffic signal controller 100 can be performed without stopping the operation, and a more remarkable effect can be expected.

Embodiment 2
In the first embodiment, the priority order of the identifiers is determined by each lamp driving device 200. However, the present invention is not limited to this, and the identifiers are determined by the main traffic signal controller 100 and the secondary traffic signal controller 110. Can also be determined.

  FIG. 6 is a block diagram showing an example of the configuration of the main traffic signal controller 120 of the second embodiment. The difference from the main traffic signal controller 100 of the first embodiment is that an identifier comparison unit 121 is provided. That is, the main traffic signal controller 120 includes a communication unit 101, a control unit 102, an interface unit 103, a storage unit 104, a power supply unit 105, an identifier comparison unit 121, and the like.

  The storage unit 104 stores an identifier 104a (“0001”) for identifying itself, a command plan 104b, and a priority table 104c. The priority order table 104c is the same as the priority order table 203a described with reference to FIG.

  The control unit 102 converts the stored identifier 104a (“0001”) into communication data in a predetermined format, and outputs the converted data to the slave traffic signal controller through the interface unit 103. The communication data format in this case is a format in which the command content is omitted in the example of FIG.

  The control unit 102 receives the data transmitted from the slave traffic signal controller through the interface unit 103, extracts an identifier from the received data, and outputs the extracted identifier to the identifier comparison unit 121.

  Based on the identifier input from the control unit 102, the identifier comparison unit 121 refers to the priority order table 104c stored in the storage unit 104, compares the input identifier with its own identifier 104a, and determines which identifier Is determined to have the highest priority. In this case, the identifier comparing unit 121 has the identifier “0002” of the slave traffic signal controller as the input identifier and “0001” as its own identifier 104a, so that its identifier “0001” has the highest priority. It is determined that the identifier is high.

  When the identifier 104a of the identifier comparison unit 121 has the highest priority, the identifier comparison unit 121 outputs a permission signal for permitting the control unit 102 to output a signal lamp output command. Moreover, the identifier comparison part 121 outputs the prohibition signal which prohibits the output of a signal lamp device output command with respect to the control part 102, when the input identifier has the highest priority. The identifier comparison unit 121 may be included in the control unit 102.

  When the control unit 102 acquires the permission signal from the identifier comparison unit 121, the control unit 102 issues a signal lamp output command (control signal) for performing control such as lighting, extinction, and blinking of each signal lamp 3 based on the command plan 104b. Then, the generated signal lamp output command is converted into communication data of a predetermined format through the interface unit 103 and is output to each lamp drive device 220 described later. Note that the format of the communication data in this case is a format in which the identifier is omitted in the example of FIG.

  Since the functions of the communication unit 101, the interface unit 103, and the power supply unit 105 are the same as those in the first embodiment, description thereof is omitted. The configuration of the secondary traffic signal controller is different from that of the primary traffic signal controller 120 in that it stores its own identifier (“0002”). Omitted.

  With the above-described configuration, the main traffic signal controller 120 outputs its own identifier 104a through the network 50 and receives the identifier output by the slave traffic signal controller. The secondary traffic signal controller also outputs its own identifier through the network 50 and receives the identifier 104a output from the main traffic signal controller 120. The identifier can be configured to be output at a predetermined time interval. If the identifier cannot be received even after the predetermined time has elapsed, some abnormality has occurred in the traffic signal controller identified by the identifier. Can be determined. The determination of the presence / absence of abnormality is not limited to the configuration for determining based on the time until the identifier is received, and the range from the minimum value to the maximum value of the display time is stored in advance for each signal color. Alternatively, it may be determined as abnormal when it can be determined that the display time of the signal lamp color is out of the range. Alternatively, the order of the signal lamp colors to be displayed may be stored, and it may be determined that there is an abnormality when the order is displayed in a different order.

  Then, each of the main traffic signal controller 120 and the secondary traffic signal controller determines whether or not it outputs a signal lamp output command to each lamp driving device 220 based on the stored priority order table 104c. To do. In this case, the main traffic signal controller 120 having the highest priority outputs a signal lamp output command to each lamp driver 220.

  FIG. 7 is a block diagram illustrating an example of the configuration of the lamp driving device 220 according to the second embodiment. The difference from Embodiment 1 is that the identifier determination unit 202 and the storage unit 203 are not provided. That is, the interface unit 201 extracts a signal lamp output command from the received data, generates a drive signal for driving the signal lamp 3 based on the extracted signal lamp output command, and outputs the drive signal to each semiconductor relay 205. . Note that the power supply unit 204, the semiconductor relay 205, and the voltage detection unit 206 are the same as those in the first embodiment, and a description thereof will be omitted.

  Next, the operation of the traffic signal control system according to the second embodiment will be described. As described above, each of the main traffic signal controller 120 and the secondary traffic signal controller outputs an identifier to each other through the network 50, compares the identifier input through the network 50 with its own identifier, It is determined whether the priority of the identifier is high. As a result, the main traffic signal controller 120 outputs a signal lamp output command to each lamp driver 220, and the lamp driver 220 receives the signal lamp output command output by the main traffic signal controller 120.

  In this case, when a failure occurs in the main traffic signal controller 120 and the identifier 104a and the signal lamp output command cannot be output, the slave traffic signal controller does not accept the identifier “0001”. The identifier “0002” has the highest priority, and the slave traffic signal controller outputs a signal lamp output command to each lamp driver 220. In the lamp driver 220, the signal lamp output by the slave traffic controller is output. Accept output command.

  As a result, even if the main traffic signal controller 120 is out of order and cannot output a signal lamp output command to the lamp driving device 220 and the control of the signal lamp 3 becomes impossible, the sub traffic signal controller Can output a signal lamp output command to each lamp driving device 220 in place of the main traffic signal controller 120 to control the signal lamp 3, and continuously turn on or off the signal lamp 3 without stopping it. be able to.

Embodiment 3
In the second embodiment, the identifier is compared between the main traffic signal controller and the secondary traffic signal controller. However, the monitoring device is connected to the network 50, and the monitoring device determines whether the main traffic signal controller is normal or abnormal. It can also be determined.

  FIG. 8 is a schematic diagram showing an example of the configuration of the traffic signal control system according to the third embodiment. In the third embodiment, the traffic signal control system is a main traffic signal control that performs control such as lighting, extinguishing, or blinking of each of the lamp driving devices 220 installed in the vicinity of each of the signal lamps 3. , A slave traffic signal controller 140 that functions as a backup when the main traffic signal controller 130 fails, a monitoring device 400 that monitors normality / abnormality of the main traffic signal controller 130, and the like are connected via a network 50. The lamp driving device 220 has the same configuration as that in the second embodiment.

  A commercial power source 1a is connected to the main traffic signal controller 130, a commercial power source 1b is connected to the slave traffic signal controller 140, a commercial power source 1c is connected to the monitoring device 400, and each lamp driving device 220 is connected. Are connected to commercial power supplies 2a, 2b,.

  FIG. 9 is a block diagram illustrating an example of the configuration of the main traffic signal controller 130 according to the third embodiment. The difference from the main traffic signal controller 120 of the second embodiment is that the identifier comparison unit 121 and the priority order table 104c are not provided, but an operation permission determination unit 131 is provided instead.

  The control unit 102 converts the stored identifier 104 a (“0001”) into communication data in a predetermined format, and outputs the converted data to the monitoring apparatus 400 through the interface unit 103. The communication data format in this case is a format in which the command content is omitted in the example of FIG.

  The control unit 102 receives the data transmitted from the monitoring device 400 through the interface unit 103, extracts the response signal of the monitoring device 400 from the received data, and outputs the extracted response signal to the operation permission determination unit 131.

  The operation permission determination unit 131 determines whether or not the response signal is an operation permission signal. If the response signal is the operation permission signal, the operation permission determination unit 131 outputs a permission signal for permitting the control unit 102 to output a signal lamp output command. Output. Further, when the response signal is an operation prohibition signal, the operation permission determination unit 131 outputs a prohibition signal for prohibiting the output of the signal lamp output command to the control unit 102. Note that the operation permission determination unit 131 may be included in the control unit 102.

  When the control unit 102 acquires the permission signal from the operation permission determination unit 131, the signal lamp output command (control signal) for performing control such as lighting, extinguishing, blinking, etc. of each signal lamp 3 based on the command plan 104b. And the generated signal lamp output command is converted into communication data of a predetermined format through the interface unit 103 and output to each lamp driving device 220. Note that the format of the communication data in this case is a format in which the identifier is omitted in the example of FIG.

  Since the functions of the communication unit 101, the interface unit 103, and the power supply unit 105 are the same as those in the second embodiment, description thereof is omitted. The configuration of the secondary traffic signal controller 140 is different from the primary traffic signal controller 130 in that it stores its own identifier (“0002”), but is otherwise the same as the primary traffic signal controller 130. Is omitted.

  FIG. 10 is a block diagram illustrating an example of the configuration of the monitoring apparatus 400. The monitoring apparatus 400 includes a communication unit 401, a monitoring control unit 402, an interface unit 403, a storage unit 404, a power supply unit 405, and the like.

  The storage unit 404 stores a priority order table 404a, and sets the priority order of identifiers for identifying traffic signal controllers that can be connected to the network 50.

  The communication unit 401 has a communication function for transmitting and receiving data to and from a central device (not shown). As a result, the monitoring device 400 receives data necessary for monitoring the traffic signal controller from the central device and transmits the monitoring result to the central device.

  The monitoring control unit 402 receives data including identifiers output from the main traffic signal controller 130 and the secondary traffic signal controller 140 through the interface unit 403, extracts the identifiers from the received data, and based on the extracted identifiers The traffic signal controller with the highest priority is identified by referring to the priority table 404a. In this case, since the identifier 104a (“0001”) of the main traffic signal controller 130 has a higher priority than the identifier (“0002”) of the sub traffic signal controller 140, the main traffic signal controller 130 is specified.

  The monitoring control unit 402 outputs, as a response signal, an operation permission signal for permitting the output of the signal lamp output command to the main traffic signal controller 130 identified by the highest priority identifier (“0001”). In addition, the monitoring control unit 402 responds to the slave traffic signal controller 140 identified by an identifier other than the identifier with the highest priority (“0002”) with an operation prohibiting signal that prohibits the output of the signal lamp output command. Output as a signal.

  The power supply unit 405 includes an AC / DC power supply unit (not shown) that rectifies AC 100V AC supplied from the commercial power supply 1c into DC and generates a predetermined DC voltage. The AC / DC power supply unit is a communication unit. 401, a monitoring control unit 402, an interface unit 403, and a storage unit 404 are configured to supply a DC voltage.

  With the above configuration, the main traffic signal controller 130 and the secondary traffic signal controller 140 output their own identifiers to the monitoring device 400 via the network 50. And the monitoring apparatus 400 permits the output of a signal lamp output command with respect to the main traffic signal controller 130 with the highest priority based on the stored priority order table 404a. The identifier can be configured to be output at a predetermined time interval. When the identifier cannot be received even after the predetermined time has elapsed, the monitoring device 400 sends the identifier to the traffic signal controller identified by the identifier. It can be determined that some abnormality has occurred. The determination of the presence / absence of abnormality is not limited to the configuration for determining based on the time until the identifier is received, and the range from the minimum value to the maximum value of the display time is stored in advance for each signal color. Alternatively, it may be determined as abnormal when it can be determined that the display time of the signal lamp color is out of the range. Alternatively, the order of the signal lamp colors to be displayed may be stored, and it may be determined that there is an abnormality when the order is displayed in a different order.

  Next, the operation of the traffic signal control system according to the third embodiment will be described. As described above, the main traffic signal controller 130 and the secondary traffic signal controller 140 each output the identifier to the monitoring device 400 via the network 50. The monitoring device 400 determines which of the obtained identifiers has a higher priority, and permits the main traffic signal controller 130 having a higher identifier priority to output a signal lamp output command. As a result, the main traffic signal controller 130 outputs a signal lamp output command to each lamp driver 220, and the lamp driver 220 receives the signal lamp output command output by the main traffic signal controller 130.

  In this case, when the failure occurs in the main traffic signal controller 130 and the identifier cannot be output, the monitoring device 400 does not accept the identifier “0001”. Therefore, the identifier output by the slave traffic signal controller 140 “0002” has the highest priority and permits the slave traffic signal controller 140 to output a signal lamp output command. As a result, the secondary traffic signal controller 140 outputs a signal lamp output command to each lamp drive device 220 in place of the primary traffic signal controller 130, and the secondary traffic signal controller 140 outputs the lamp drive device 220. A signal lamp output command is received.

  As a result, even if the main traffic signal controller 130 is out of order and cannot output a signal lamp output command to the lamp driving device 220 and the control of the signal lamp 3 becomes impossible, the sub traffic signal controller 140 can output a signal lamp output command to each lamp driving device 220 in place of the main traffic signal controller 130 to control the signal lamp 3, and can continue without stopping the lighting or extinguishing of the signal lamp 3. It can be carried out.

Embodiment 4
In the first to third embodiments, the traffic signal controller and the lamp driving device are configured to transmit and receive data between the traffic signal controller and the lamp driving device by wired communication using a signal line or wireless communication. When the apparatus is connected to the power line of the same system, the signal line or the wireless communication facility can be made unnecessary by superimposing data on the power line.

  FIG. 11 is a schematic diagram illustrating an example of the configuration of the traffic signal control system according to the fourth embodiment. In the fourth embodiment, the traffic signal control system is a main traffic signal control that performs control such as lighting, extinguishing, or blinking of the lamp driving device 250,... Installed in the vicinity of each signaling lamp 3. 150, the secondary traffic signal controller 160 functioning as a backup when the main traffic signal controller 150 fails, etc. are connected by the power line 60, and the commercial power source 1 is connected to the power line 60.

  FIG. 12 is a block diagram illustrating an example of the configuration of the main traffic signal controller 150 according to the fourth embodiment. The difference from the main traffic signal controller 100 (see FIG. 2) of the first embodiment is that the interface unit 103 is not provided, but a modulation / demodulation unit 151, filter units 152, 153, and the like are provided instead. is there.

  The modulation / demodulation unit 151 includes a carrier wave generation unit, a frequency modulation unit (both not shown), etc., and the carrier wave generation unit generates, for example, a 200 kHz carrier wave and transmits data (for example, an identifier, a signal lamp output command, etc.) ) To generate a tone signal to which frequency modulation of several kHz is applied, and outputs the tone signal generated through the filter unit 152 to the power line 60.

  The modulation demodulator 151 demodulates the tone signal transmitted through the power line 60 and extracts the original data.

  The filter unit 152 is a bandpass filter having a required frequency band, and separates a tone signal to be transmitted / received from a commercial frequency.

  The filter unit 153 is, for example, a low-pass filter, blocks high-frequency components superimposed on the power line 60, and outputs commercial frequency alternating current (AC 100 V) to the power supply unit 105.

  Since the functions of the communication unit 101, the control unit 102, the storage unit 104, and the power supply unit 105 are the same as those in the first embodiment, description thereof is omitted. Further, the configuration of the secondary traffic signal controller 160 is the same as that of the main traffic signal controller 150, and thus the description thereof is omitted.

  FIG. 13 is a block diagram illustrating an example of the configuration of the lamp driving device 250 according to the fourth embodiment. The difference from the lamp driving device 200 of Embodiment 1 (see FIG. 4) is that a modulation / demodulation unit 251, filter units 252, 253, and the like are provided.

  The modulation / demodulation unit 251 includes a carrier wave generation unit, a frequency modulation unit (both not shown), and the like. The carrier wave generation unit generates, for example, a 200 kHz carrier wave and transmits data (for example, a signal lamp output detection signal). Accordingly, a tone signal to which frequency modulation of several kHz is applied is generated, and the generated tone signal is output to the power line 60 through the filter unit 252.

  Further, the modulation / demodulation unit 251 extracts the original data by demodulating the tone signal transmitted through the power line 60, and outputs the extracted data to the interface unit 201.

  The filter unit 252 is a bandpass filter having a required frequency band, and separates a tone signal to be transmitted / received from a commercial frequency.

  The filter unit 253 is, for example, a low-pass filter, blocks high-frequency components superimposed on the power line 60, and outputs commercial frequency alternating current (AC 100 V) to the power supply unit 204.

  Since the functions of the interface unit 201, the identifier determination unit 202, the storage unit 203, the power supply unit 204, the semiconductor relay 205, and the voltage detection unit 206 are the same as those in the first embodiment, description thereof will be omitted.

  Compared to the case where the traffic signal controller and the lamp driving device are connected by a signal line, the above-described configuration eliminates the need for signal line wiring work and facilitates installation work. It is possible to reduce the impact at the time of disaster such as disconnection.

  As described above, in the present invention, it is possible to control a signal lamp with a plurality of traffic signal controllers, prevent a situation in which the control of the signal lamp is disabled, and improve the reliability of control of the signal lamp. This can be improved dramatically compared to the prior art. Even if the main traffic signal controller is out of order and control of the lamp drive device becomes impossible, the sub traffic signal controller can control each lamp drive device instead of the main traffic signal controller. The signal lamp can be continuously turned on or off without stopping. In addition, the traffic light controller can be inspected and maintained without stopping the operation of each signal lamp, for example, when there is no restriction such as performing maintenance work at night when there is little traffic in the vehicle. In addition to being able to perform work, even during maintenance work, it is possible to ensure safe traffic such as vehicles passing an intersection or pedestrians crossing a pedestrian crossing. Further, the maintenance work can be started simply by connecting the maintenance device to the network, and the maintenance work becomes easy.

  In addition, this invention is not limited to an Example.

  In the above-described first to fourth embodiments, the centralized traffic signal controller has been described. However, the present invention can also be applied to a traffic signal controller of a type that operates alone without a communication unit. .

  In the first to fourth embodiments described above, the lamp driving device and the signal lamp are configured as separate devices, but the invention is not limited to this, and the lamp driving device is built in the signal lamp. It is also possible to adopt a configuration in which the lamp driving device can be detachably attached to the signal lamp.

  In the above-described fourth embodiment, the tone signal with frequency modulation is used as a method for superimposing data on the power line. However, the method for superimposing data on the power line is not limited to this. This method may be used. For example, it is possible to mount a PLC modem (power line modem) in a traffic signal controller, monitoring device, maintenance device, and lamp driving device by using a technique for superimposing data on a power line used in PLC (power line carrier communication). .

  In Embodiment 2 described above, the main traffic signal controller outputs its own identifier to the slave traffic signal controller, and the slave traffic signal controller outputs its own identifier to the master traffic signal controller. The priority order of the identifiers is determined, but the present invention is not limited to this. The main traffic signal controller outputs its own identifier to the slave traffic signal controller, and the slave traffic signal controller If the identifier output from the controller is obtained, the priority order is determined with its own identifier, and the primary traffic signal controller is abnormal and cannot output the identifier, the secondary traffic signal controller identifier is It is also possible to determine that the priority is highest and to cause the slave traffic signal controller to output a signal lamp output command to the lamp driving device.

  In Embodiments 1 to 4 described above, the configuration in which two traffic signal controllers and six lamp drive devices are connected to the network has been described. However, the number of traffic signal controllers and lamp drive devices is It is not limited to. Moreover, although it was the structure which controls the signal light apparatus of several intersections with one main traffic signal controller, it is not limited to this. A signal lamp (lamp driving device) controlled by one main traffic signal controller can be set as appropriate according to road conditions. For example, in a configuration in which there are n intersections, a required number of signal lamps are provided at each intersection, and one or a plurality of lamp driving devices for driving the signal lamps at each intersection are provided, n units are provided for each intersection. A main traffic signal controller may be installed, and a plurality of intersections may be collectively controlled by a single main traffic signal controller. The slave traffic signal controller can also be provided as a backup machine for each master traffic signal controller, and a configuration in which a single slave traffic signal controller backs up a plurality of master traffic signal controllers, Or the structure which provides one subordinate traffic signal controller in one network may be sufficient.

  In the above-described first to fourth embodiments, the slave traffic signal controller has the same configuration as the main traffic signal controller. This is because at important intersections where signal lights cannot be controlled (for example, intersections where trunk lines cross), even if the main traffic signal controller fails, This is because it is desirable to back up with a secondary traffic signal controller having the same function as the function and to configure as a true dual system. However, depending on the road conditions, the configuration of the secondary traffic signal controller can be simplified to reduce the cost. In this case, the slave traffic signal controller can omit the communication function with the central device and the interface function with the vehicle detector. In addition, the function of the slave traffic signal controller can be limited to only a function necessary for controlling the signal lamp device (for example, a function of lighting each color lamp of the signal lamp device in turn at regular intervals). In this case, since the slave traffic signal controller can be reduced in size, it is not necessary to form a separate housing from the main traffic signal controller, and it can be arranged inside the housing of the main traffic signal controller. .

It is a schematic diagram which shows an example of a structure of the traffic signal control system which concerns on this invention. It is a block diagram which shows an example of a structure of a main traffic signal controller. It is explanatory drawing which shows an example of communication data. It is a block diagram which shows an example of a structure of a lamp drive device. It is a block diagram which shows an example of a structure of a maintenance apparatus. It is a block diagram which shows an example of a structure of the main traffic signal controller of Embodiment 2. It is a block diagram which shows an example of a structure of the lamp drive device of Embodiment 2. FIG. 10 is a schematic diagram illustrating an example of a configuration of a traffic signal control system according to a third embodiment. It is a block diagram which shows an example of a structure of the main traffic signal controller of Embodiment 3. It is a block diagram which shows an example of a structure of a monitoring apparatus. It is a schematic diagram which shows an example of a structure of the traffic signal control system of Embodiment 4. It is a block diagram which shows an example of a structure of the main traffic signal controller of Embodiment 4. It is a block diagram which shows an example of a structure of the lamp drive device of Embodiment 4. It is a schematic diagram which shows an example of a structure of the conventional traffic signal control system. It is a block diagram which shows the structure of the conventional SSU.

Explanation of symbols

3 Signal lamp 50 Network 60 Power line 100, 120, 130, 150 Main traffic signal controller 101 Communication unit 102 Control unit 103 Interface unit 104 Storage unit 104a Identifier 104b Command plan 104c Priority order table 105 Power supply unit 110, 140, 160 Follow traffic Signal controller 121 Identifier comparison unit 131 Operation permission determination unit 151 Modulation demodulation unit 152, 153 Filter unit 200, 220 Lamp drive device 201 Interface unit 202 Identifier determination unit 203 Storage unit 203a Priority order table 204 Power supply unit 205 Semiconductor relay 206 Voltage Detection unit 251 Modulation demodulation unit 252 253 Filter unit 300 Maintenance device 302 Control unit 303 Interface unit 304 Storage unit 304a Identifier 304b Maintenance command plan 305 Power supply unit 4 0 monitoring device 401 communication unit 402 monitoring control unit 403 interface unit 404 storage unit 404a priority table 405 power supply unit

Claims (8)

In a traffic signal control system comprising a plurality of lamp driving devices that drive a signal lamp, and a plurality of traffic signal controllers that control the lamp driving device to turn on or off the signal lamp,
Each of the traffic signal controllers is configured to be able to control each lamp driving device,
A granting means for giving identification information for identifying each traffic signal controller;
Selecting means for selecting one piece of identification information from the identification information given by the giving means,
A traffic signal control system configured to control each lamp driving device with a traffic signal controller identified by identification information selected by the selection means. The traffic signal controller is
It comprises means for outputting identification information for identifying itself and a control signal for controlling each lamp driving device to each lamp driving device,
The lamp driving device is:
Storage means for storing the priority of the identification information;
Acquisition means for acquiring identification information output by each traffic signal controller;
Receiving means for receiving a control signal output by the traffic signal controller identified by the identification information having the highest priority among the identification information obtained by the obtaining means,
2. The traffic signal control system according to claim 1, wherein the signal lamp is driven based on the control signal received by the receiving means. The traffic signal controller is
Means for outputting identification information for identifying itself to another traffic signal controller;
Storage means for storing the priority of the identification information;
Acquisition means for acquiring identification information output by another traffic signal controller;
Means for outputting a control signal for controlling each lamp driving device when the priority order of the identification information is higher than the priority order of the identification information acquired by the acquisition means;
The lamp driving device is:
The traffic signal control system according to claim 1, wherein a signal lamp is driven based on the control signal. It has a monitoring device that monitors the operation of each traffic signal controller,
The monitoring device
Storage means for storing the priority of identification information for identifying each traffic signal controller;
Acquisition means for acquiring identification information of each traffic signal controller;
Means for outputting an operation permission signal to the traffic signal controller identified by the identification information with the highest priority among the identification information acquired by the acquisition means,
The traffic signal controller is
Means for outputting identification information for identifying itself to the monitoring device;
Receiving means for receiving the operation permission signal;
2. The traffic signal control system according to claim 1, further comprising: means for outputting a control signal for controlling each lamp driving device when the operation permission signal is received by the receiving means. The lamp driving device and the traffic signal controller are:
The traffic signal control system according to any one of claims 2 to 4, further comprising wireless communication means for communicating the control signal by radio. In a traffic signal controller that controls a lamp driving device that drives a signal lamp to turn on or off the signal lamp,
A traffic signal controller comprising means for outputting identification information for identifying itself. In the lamp driving device for driving the signal lamp,
Storage means for storing the priority of identification information for identifying the traffic signal controller;
Acquisition means for acquiring identification information;
Receiving means for receiving a control signal output by the traffic signal controller identified by the identification information having the highest priority among the identification information obtained by the obtaining means,
A lamp driving device characterized in that the signal lamp is driven based on a control signal received by the receiving means.   A signal lamp device comprising the lamp drive device according to claim 7.

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