JP2008090343A - Traffic signal controller - Google Patents

Abstract

A traffic signal controller capable of preventing a signal lamp from being completely extinguished or abnormally lit and ensuring safe passage of a vehicle or a pedestrian or the like.
When an abnormality notification signal is received from a control unit, a monitoring unit determines that the control unit is abnormal. The monitoring unit 106 monitors the signal lamp output command output from the control unit 102 to the lamp driving unit 104, and determines that the control unit 102 is abnormal when an abnormality occurs in the signal lamp output command. When the control unit 102 determines that the control unit 102 is abnormal, the monitoring unit 106 outputs a signal lamp output command (control signal) to the lamp drive unit 104 instead of the control unit 102 to control the signal lamp 51. By providing the monitoring unit 106, the fail-safe function of the traffic signal controller 100 is dramatically enhanced.
[Selection] Figure 1

Description

  The present invention relates to a traffic signal controller that controls lighting or extinction of a signal lamp, and relates to a traffic signal controller that can prevent the signal lamp from being uncontrollable and enhance a fail-safe function.

  At intersections and pedestrian crossings, multiple signal lamps are installed at predetermined positions to ensure safe traffic for vehicles, pedestrians, etc., and the blue, yellow, red, and blue lights of each signal lamp A traffic signal controller is installed for controlling the lighting or extinguishing of an arrow lamp or the like at predetermined time intervals.

  FIG. 5 is a block diagram showing a configuration of a conventional centralized traffic signal controller 200. The centralized traffic signal controller 200 has a function of performing information communication such as a command plan for traffic signal control and a traffic signal control status with a traffic control device or a central device installed in a traffic control center or the like. It is. There are also point-type traffic signal controllers that control the signal lamps independently without communicating with the traffic control device or the central device.

  As shown in FIG. 5, a conventional centralized traffic signal controller 200 includes a communication unit 201, a control unit 202, a lamp driving unit 204, a power supply unit 207, and the like. The communication unit 201 has a function of performing communication with the central apparatus 1. The control unit 202 generates a signal lamp output command for driving the signal lamp unit based on the command plan transmitted from the central apparatus 1, and outputs the generated signal lamp unit output command to the lamp drive unit 204.

  Based on the signal lamp output command input from the control unit 202, the lamp driving unit 204 outputs a drive signal that is an ON / OFF signal of AC 100 V supplied from the commercial power source 2 (AC power source) to the signal lamp 51. . The power supply unit 207 converts AC100V supplied from the commercial power supply 2 into a predetermined direct current, and supplies a predetermined direct current voltage to each unit (communication unit 201, control unit 202, lamp driving unit 204, etc.) in the traffic signal controller 200. Supply.

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 disclosed in Patent Document 1, although a highly reliable traffic signal system can be provided in an area where commercial power is not supplied, traffic is supplied to commercial power supply areas such as urban areas, urban areas, and suburbs. When installing a signal controller, it is premised on the supply of power from a commercial power source in advance, and a conventional traffic signal controller is often used rather than a self-contained traffic signal system.

However, in the conventional traffic signal controller, when some abnormality occurs in the control unit for controlling the signal lamp, the drive signal to the signal lamp is not output, or the signal lamp is completely extinguished, or There is a possibility that an abnormality may occur in turning on or off the signal lamp, and there is a problem that it is not possible to ensure safe traffic such as a vehicle passing an intersection or a pedestrian crossing a pedestrian crossing. In addition, when an abnormality occurs in the control of the signal lamp device, it has been desired that the situation can be quickly detected and the repair work can be quickly performed.

  The present invention has been made in view of such circumstances, and replaces the signal generating means when it is determined that the signal generating means for generating the control signal for controlling the lighting or extinguishing of the signal lamp is abnormal. By providing an output means for outputting a control signal, it is possible to provide a traffic signal controller capable of preventing a signal lamp from being completely extinguished or abnormally lit and ensuring safe passage of a vehicle or a pedestrian. Objective.

  A traffic signal controller according to a first aspect of the present invention is a traffic signal controller for controlling lighting or extinguishing of a signal lamp, wherein a signal generating means for generating a control signal for controlling lighting or extinguishing of the signal lamp is provided; A determination unit that determines normality / abnormality; and an output unit that outputs a control signal instead of the signal generation unit when the determination unit determines that the signal generation unit is abnormal. .

  According to a second aspect of the present invention, there is provided a traffic signal controller according to the first aspect, wherein the update information for updating the control signal generated by the signal generation means is received from outside, and the update information received by the means is stored. Storage means, and the output means is configured to output a control signal based on the stored update information when it is determined that the signal generation means is abnormal. To do.

  A traffic signal controller according to a third aspect of the present invention is the traffic signal controller according to the first aspect, wherein when it is determined that the signal generating means is abnormal, a means for outputting an abnormal signal indicating that the signal lamp cannot be controlled; Means for receiving control information for the device, and the output means is configured to output a control signal based on the control information received by the means.

  A traffic signal controller according to a fourth aspect of the present invention is the traffic signal controller according to any one of the first to third aspects, wherein means for receiving an abnormal signal indicating that the signal lamp is not controllable and the means for receiving the abnormal signal And a means for outputting control information for controlling the signal lamp.

  The traffic signal controller according to a fifth aspect of the present invention is the traffic signal controller according to any one of the first to fourth aspects of the present invention, means for storing the minimum or maximum value of the signal lamp color display time, and means for detecting the signal lamp color display time The determination means is configured to determine that the signal generation means is abnormal when the display time detected by the means is less than the minimum value or greater than the maximum value. Features.

  A traffic signal controller according to a sixth aspect of the present invention, in any one of the first to fifth aspects, transmits a notification signal notifying that the control signal has been switched to the outside when the output means outputs the control signal. Means are provided.

In the first invention, the signal generating means generates a control signal (for example, a signal lamp output command) for controlling lighting or extinguishing of the signal lamp. The determination unit determines whether the signal generation unit is normal or abnormal. For example, when the signal generation unit outputs an abnormality notification signal for notifying itself of abnormality, the determination unit determines that the signal generation unit is abnormal. The determination unit monitors the control signal generated and output by the signal generation unit. For example, when there is an abnormality in the lighting duration of the signal lamp based on the control signal, or when there is an abnormality in the lighting order of the signal lamp, the determination unit determines that the signal generation unit is abnormal. When the determination unit determines that the signal generation unit is abnormal, the output unit generates and outputs a new control signal instead of the control signal generated by the signal generation unit. This prevents the signal lamp from being completely extinguished or abnormally lit.

  In the second invention, update information (for example, the latest command plan, etc.) for updating the control signal is received from the outside (for example, a traffic control device or a central device installed in a traffic control center). The received update information is stored. The signal generator generates a control signal based on the received update information. The output means outputs a control signal based on the stored update information when it is determined that the signal generation means is abnormal. Thereby, even when the signal generating means becomes abnormal, the output means can output the same control signal as the control signal generated by the signal generating means based on the latest update information. Since there are no major changes, the impact on traffic flow can be minimized.

  In the third invention, when it is determined that the signal generation means is abnormal, an abnormal signal indicating that the control of the signal lamp is impossible is output. For example, the abnormal signal is transmitted to another adjacent traffic signal controller. Information for controlling the signal lamp transmitted by another traffic signal controller is received. The output means outputs a control signal based on the received control information. Thereby, even when an abnormality occurs in the signal generation means, a control signal can be output based on the control information received from another traffic signal controller.

  In the fourth aspect of the invention, for example, when an abnormal signal indicating that the signal lamp cannot be controlled is received from another traffic signal controller, control information for controlling the signal lamp is output. For example, the control information is transmitted to the other traffic signal controller. The control information can be stored in advance, can be generated based on update information transmitted from the outside (for example, the central device), or control for controlling the signal lamp that is its control target It can also be generated in association with the signal (for example, by setting a required offset). Thereby, for example, in order to maintain a smooth flow of traffic between adjacent intersections, it is possible to control the signal lamps between adjacent traffic signal controllers.

  In the fifth aspect of the invention, the signal lamp color display time is detected, and the determination means detects that the signal generation means is abnormal when the detected display time is smaller than the minimum value or larger than the maximum value of the signal lamp color display time. It is determined that Thereby, the abnormal display of a signal lamp can be prevented.

  In the sixth invention, when a control signal is output by the output means, a notification signal notifying that the control signal has been switched is transmitted to the outside. Thereby, for example, when it is determined that the signal generation unit of the traffic signal controller is abnormal and the control signal is switched, the fact can be promptly notified to the outside (for example, the central device). .

  In the present invention, when it is determined that the signal generating means for generating the control signal is abnormal, the signal lamp device is provided with output means for outputting the control signal instead of the signal generating means, so that the signal lamp device is completely extinguished or abnormal. It is possible to prevent lighting and ensure safe passage of a vehicle or a pedestrian, and the reliability can be dramatically 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 controller 100 according to the present invention. The traffic signal controller 100 of the present invention is a centralized traffic signal controller, and includes a communication unit 101, a control unit 102, a storage unit 103, a lamp driving unit 104, an interface unit 105, a monitoring unit 106, a power supply unit 107, and the like. It has.

A central device 1 installed in a traffic control center or the like is connected to the traffic signal controller 100 through a predetermined communication line. The traffic signal controller 100 is connected to a commercial power source 2 (AC 100V AC power source). The traffic signal controller 100 is connected to a signal lamp 51, another traffic signal controller 100, and the like.

  The communication unit 101 receives a command plan related to traffic signal control from the central device 1 and transmits signal control execution information including information on the time when the signal lamp 51 obtained by the traffic signal controller 100 is controlled to be turned on / off. 1 is provided with a communication function for transmitting to the terminal 1. The command plan includes information such as signal control parameters (for example, cycle, split, offset, etc.) and is appropriately transmitted to the traffic signal controller 100 by the central device 1, and the traffic signal controller 100 is updated with the latest command plan. The signal lamp 51 can be controlled based on the above.

  The control unit 102 stores the command plan received by the communication unit 101 in the storage unit 103. As a result, the command plan is always updated to the latest one. The control unit 102 includes a CPU and a memory (both not shown), and a signal lamp output command (control signal) for controlling lighting, extinction, blinking, and the like of the signal lamp 51 based on the received command plan. And the generated signal lamp output command is output to the lamp drive unit 104.

  In addition, the control unit 102 generates a signal lamp output command to be used by another traffic signal controller 100 (for example, a traffic signal controller that controls a signal lamp at an adjacent intersection) based on the received command plan. Output command information is generated in advance, and the generated output command information is stored. Thereby, when the abnormality of the other traffic signal controller 100 is notified through the interface unit 105, the control unit 102 transmits the stored output command information to the other traffic signal controller 100, and the other traffic signal controller 100 can receive the output command information and generate a signal lamp output command based on the received output command information to control the signal lamp.

  Instead of the above-described method, when the control unit 102 generates a signal lamp output command to control the signal lamp 51 that is its control target, for example, a required The output command information is generated in consideration of the offset, and the generated output command information is transmitted to the other traffic signal controller 100 so that the other traffic signal controller 100 can use the output command information. it can. Alternatively, when an abnormality of another traffic signal controller 100 is notified through the interface unit 105, a command plan for the other traffic signal controller 100 is received from the central apparatus 1, and an output command is issued based on the received command plan. By generating the information and transmitting the generated output command information to the other traffic signal controller 100, the other traffic signal controller 100 can be used.

  The lamp driving unit 104 includes a semiconductor relay (not shown), supplies AC 100 V supplied from the commercial power supply 2 to the signal lamp 51, and based on a signal lamp output command input from the control unit 102 or the monitoring unit 106. Thus, the AC 100 V supplied to the signal lamps of the respective colors corresponding to the red lamp, the blue lamp, and the yellow lamp of the signal lamp device 51 is turned on / off.

  Further, the lamp driving unit 104 includes a selector circuit (not shown), and when the switching signal is not input from the monitoring unit 106, receives the signal lamp output command output from the control unit 102 and receives the switching signal from the monitoring unit 106. Is input, the signal lamp output command output from the control unit 102 is invalidated, and the signal lamp output command output from the monitoring unit 106 is received.

  The interface unit 105 has a function of transmitting / receiving data to / from another traffic signal controller 100.

The power supply unit 107 includes an AC / DC power supply unit (not shown) that rectifies AC 100V AC supplied from the commercial power supply 2 into DC and generates a predetermined DC voltage. The AC / DC power supply unit is a communication unit. 101, a control unit 102, a storage unit 103, a lamp drive unit 104, and an interface unit 105 are configured to supply a DC voltage. In addition, it is set as the structure provided with a battery in the power supply part 107, and when the commercial power supply 2 is interrupted | blocked, it can replace with the DC voltage which rectified AC100V, and can supply the DC voltage of a battery to each part.

  The monitoring unit 106 can be configured with a hardware circuit such as an LSI or an ASIC, or can be configured with a CPU and a memory, and can be configured by executing a control program for performing necessary control on the CPU. If the control unit 102 determines that the control unit 102 is normal, it outputs a signal lamp output command (control signal) to the lamp drive unit 104 instead of the control unit 102, The device 51 is controlled. By providing the monitoring unit 106, the fail-safe function of the traffic signal controller 100 is dramatically enhanced.

  More specifically, when the monitoring unit 106 receives from the control unit 102 an abnormality notification signal indicating that the control unit 102 is abnormal, the monitoring unit 106 determines that the control unit 102 is abnormal. For example, when the built-in CPU is not operating, when the system clock is stopped, when the CPU detects an abnormality (for example, an illegal instruction or a bus error), the control unit 102 detects a memory abnormality (for example, an addressing error). When a parity check error or the like is detected, an abnormality notification signal indicating that the control unit 102 itself is abnormal is output to the monitoring unit 106.

  The monitoring unit 106 constantly monitors the signal lamp output command output from the control unit 102 to the lamp driving unit 104 (or with predetermined sampling), and if an abnormality occurs in the signal lamp output command, the control unit 102 Judged to be abnormal. For example, the monitoring unit 106 determines the minimum value and the maximum value of the display time (present time) of the blue light, the yellow light, and the red light based on the signal control parameter stored in the storage unit 103, and monitors If the lighting time of the blue lamp is smaller than the minimum value of the blue lamp display time or larger than the maximum value of the blue lamp display time based on the signal lamp output command, the controller 102 determines that it is abnormal. . Thereby, the abnormal display of a signal lamp can be prevented. The signal lamp color to be monitored may be not only a blue lamp but also a red lamp or a yellow lamp, or a combination thereof.

  The monitoring unit 106 determines the display order (control pattern) of the blue light, the yellow light, and the red light based on the signal control parameter stored in the storage unit 103, and based on the monitored signal lamp output command. Thus, when the lighting order of the signal lamp colors is different from the display order (for example, when the red light is turned on directly from the blue light without passing through the yellow light), it is determined that the control unit 102 is abnormal.

  The monitoring unit 106 outputs a signal lamp output command to the lamp driving unit 104 when the control unit 102 is not outputting a signal lamp output command due to an abnormal state. In addition, when the signal lamp output command output from the control unit 102 is abnormal, the monitoring unit 106 outputs a switching signal to the lamp driving unit 104 and outputs a signal lamp output command to the lamp driving unit 104. Accordingly, the lamp driving unit 104 invalidates the signal lamp output command output from the control unit 102 and accepts the signal lamp output command output from the monitoring unit 106.

  When the control unit 102 determines that the control unit 102 is abnormal, the monitoring unit 106 outputs a signal lamp output command by one of the following two methods.

As a first method, when the control unit 102 determines that the control unit 102 is abnormal, the monitoring unit 106 reads the command plan stored in the storage unit 103 and generates a signal lamp output command based on the read command plan. The generated signal lamp output command is output to the lamp drive unit 104. Thereby, even if the control unit 102 becomes abnormal, it is possible to prevent the signal lamp 51 from being completely extinguished or abnormally lit, and to control the signal lamp 51 based on the latest command plan.

  That is, the monitoring unit 106 stores the updated command plan each time, and always learns the control pattern (signal lamp lighting time, lighting order, etc.) of the signal lamp 51 by storing the latest command plan. When the abnormality occurs in the control unit 102, the signal lamp 51 can be controlled based on the learned control pattern. As a result, when the update frequency of the command plan is relatively high, even when an abnormality occurs in the control unit 102, the latest control pattern of the signal lamp 51 at the intersection is used. There is no significant change in the control pattern, and the influence on traffic flow can be minimized.

  As a second method, when the monitoring unit 106 determines that the control unit 102 is abnormal, the monitoring unit 106 transmits an abnormal signal indicating that the control unit 102 is abnormal to the other traffic signal controller 100 through the interface unit 105. And receiving the output command information transmitted from the other traffic signal controller 100, generating a signal lamp output command based on the received output command information, and outputting the generated signal lamp output command to the lamp drive unit 104 To do. Thereby, even if the control unit 102 becomes abnormal, it is possible to prevent the signal lamp 51 from being completely extinguished or abnormally lit. Further, for output command information transmitted from other traffic signal controllers 100, a required offset is set for the lighting start time of each lamp color of the signal lamp 51 controlled by both traffic signal controllers 100. As a result, a smooth flow of traffic between adjacent intersections can be maintained.

  Whether to employ either the first method or the second method described above can be set as appropriate. For example, a priority order can be determined in advance and a method with a higher priority order can be used. Moreover, it can also comprise so that either of both methods can be selected.

  When the signal lamp output command is switched from the control unit 102, the monitoring unit 106 transmits a notification signal for notifying the fact to the central apparatus 1 through the communication unit 101. As a result, when an abnormality occurs in the control unit 102, the central apparatus 1 can quickly detect the situation, and the maintenance staff can quickly repair the control unit 102. When maintenance personnel perform repair work, work is performed to replace the abnormal control unit 102 with a normal one. However, since the monitoring unit 106 controls the signal lamp 51 during that time, the replacement work is performed. The maintenance work can be performed anytime without the signal lamp 51 being completely extinguished.

  Next, the operation of the traffic signal controller 100 will be described. FIG. 2 is a flowchart showing the processing procedure of the monitoring unit 106. The monitoring unit 106 determines whether or not the control unit 102 is normal (S11). If the control unit 102 is normal (YES in S11), the process of step S11 is continued, and the control unit 102 is not normal ( Wait until it is determined that it is abnormal.

  If it is determined that the control unit 102 is not normal (NO in S11), the monitoring unit 106 determines whether the interface unit 105 is normal (S12), and if the interface unit 105 is normal (in S12). (YES), an abnormal signal is transmitted to another traffic signal controller (S13), and output command information is received from another traffic signal controller (S14).

  If the interface unit 105 is not normal (NO in S12), the monitoring unit 106 reads the latest command plan stored in the storage unit 103 (S15).

The monitoring unit 106 generates a signal lamp output command based on the received output command information or the read command plan (S16), and outputs the switching signal to the lamp driving unit 104 to thereby output the signal lamp output command. Switching (S17). The monitoring unit 106 drives the signal lamp 51 by outputting the generated signal lamp output command to the lamp driving unit 104 (S18), notifies the central device 1 of the switching completion (S19), and ends the process.

Embodiment 2
In the first embodiment, the interface unit 105 is provided and the output command information is received from another traffic signal controller. However, the present invention is not limited to this, and even when the interface unit 105 is not installed, the present embodiment is not limited thereto. The invention can be applied.

  FIG. 3 is a schematic diagram illustrating an example of the configuration of the traffic signal controller 110 according to the second embodiment. The difference from the first embodiment is that the interface unit 105 is not installed, and communication with other traffic signal controllers cannot be performed. That is, the traffic signal controller 110 according to the second embodiment includes a communication unit 101, a control unit 102, a storage unit 103, a lamp driving unit 104, a monitoring unit 106, a power supply unit 107, and the like.

  In this case, when the monitoring unit 106 determines that the control unit 102 is abnormal, the monitoring unit 106 reads the command plan stored in the storage unit 103, generates a signal lamp output command based on the read command plan, and generates the signal lamp output command. A signal lamp output command is output to the lamp driving unit 104. Thereby, even if the control unit 102 becomes abnormal, it is possible to prevent the signal lamp 51 from being completely extinguished or abnormally lit, and to control the signal lamp 51 based on the latest command plan.

  That is, the monitoring unit 106 stores the updated command plan each time, and always learns the control pattern (signal lamp lighting time, lighting order, etc.) of the signal lamp 51 by storing the latest command plan. When the abnormality occurs in the control unit 102, the signal lamp 51 can be controlled based on the learned control pattern. As a result, when the update frequency of the command plan is relatively high, even when an abnormality occurs in the control unit 102, the latest control pattern of the signal lamp 51 at the intersection is used. There is no significant change in the control pattern, and the influence on traffic flow can be minimized. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Next, the operation of the traffic signal controller 110 of the second embodiment will be described. FIG. 4 is a flowchart illustrating a processing procedure of the monitoring unit 106 according to the second embodiment. The monitoring unit 106 determines whether or not the control unit 102 is normal (S31). If the control unit 102 is normal (YES in S31), the process of step S31 is continued, and the control unit 102 is not normal ( Wait until it is determined that it is abnormal.

  When it is determined that the control unit 102 is not normal (NO in S31), the monitoring unit 106 reads the latest command plan stored in the storage unit 103 (S32).

  The monitoring unit 106 generates a signal lamp output command based on the read command plan (S33), and switches the signal lamp output command by outputting a switching signal to the lamp driving unit 104 (S34). The monitoring unit 106 drives the signal lamp 51 by outputting the generated signal lamp output command to the lamp driving unit 104 (S35), notifies the central device 1 of the completion of switching (S36), and ends the process.

As described above, in the present invention, by providing the monitoring unit, the fail-safe function of the traffic signal controller is remarkably enhanced, and the signal light device is prevented from being completely extinguished or abnormally lighted. Safe traffic for pedestrians and the like can be ensured, and the reliability of the traffic signal controller can be dramatically improved. In addition, even when the control unit becomes abnormal, the traffic signal controller is driven by driving the signal lamp device based on the same signal lamp output command as the signal lamp output command generated based on the latest command plan. Since a learning function can be provided and there is no significant change in the control pattern of the signal lamp, the influence on the traffic flow can be minimized.
In addition, even when the control unit becomes abnormal, it is possible to generate a signal lamp output command based on output command information received from another traffic signal controller, for example, for the lighting start time of the adjacent signal lamp By setting the required offset, it is possible to maintain a smooth traffic flow between adjacent intersections. Further, when it is determined that the control unit is abnormal and the signal lamp output command is switched, the fact can be promptly notified to the central device, and the repair work can be performed quickly. .

  In the first and second embodiments described above, the centralized traffic signal controllers 100 and 110 have been described. However, the present invention is also applied to a traffic signal controller that operates alone at a point that does not include the communication unit 101. can do. For example, when the interface unit 105 is installed, output command information can be received from another traffic signal controller, and a signal lamp output command can be generated based on the received output command information. When the interface unit 105 is not installed, the signal lamp output command generated by the control unit 102 is stored in advance, and when an abnormality occurs in the control unit 102, the monitoring unit 106 stores it instead of the control unit 102. The signal lamp output command thus output can be output.

  In the first and second embodiments described above, the communication unit 101 and the interface unit 105 may be either a wired communication method or a wireless communication method.

  In the first embodiment, for example, when an abnormality occurs in the communication unit 101, communication with the central device 1 can be performed through the route of the central device 1, another traffic signal controller 100, and the interface unit 105. It can also be configured as follows. The present invention is not limited to the examples.

It is a schematic diagram which shows an example of a structure of the traffic signal controller which concerns on this invention. It is a flowchart which shows the process sequence of a monitoring part. It is a schematic diagram which shows an example of a structure of the traffic signal controller of Embodiment 2. 10 is a flowchart illustrating a processing procedure of a monitoring unit according to the second embodiment. It is a block diagram which shows the structure of the conventional centralized traffic signal controller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Central apparatus 51 Signal lamp 101 Communication part 102 Control part 103 Memory | storage part 104 Lamp drive part 105 Interface part 106 Monitoring part 107 Power supply part

Claims (6)

In a traffic signal controller that controls the turning on or off of signal lights,
Signal generating means for generating a control signal for controlling lighting or extinction of the signal lamp; and
Determining means for determining normality / abnormality of the signal generating means;
A traffic signal controller comprising: output means for outputting a control signal instead of the signal generation means when the determination means determines that the signal generation means is abnormal. Means for receiving from the outside update information for updating the control signal generated by the signal generating means;
Storage means for storing update information received by the means;
The output means includes
The traffic signal controller according to claim 1, wherein when it is determined that the signal generation unit is abnormal, a control signal is output based on the stored update information. Means for outputting an abnormal signal indicating that the control of the signal lamp is not possible when it is determined that the signal generating means is abnormal;
Means for receiving information for controlling the signal lamp, and
The output means includes
The traffic signal controller according to claim 1, wherein the traffic signal controller is configured to output a control signal based on the control information received by the means. Means for receiving an abnormal signal indicating that the signal lamp cannot be controlled;
The traffic signal controller according to any one of claims 1 to 3, further comprising: means for outputting control information for controlling the signal lamp device when an abnormal signal is received by the means. . Means for storing the minimum or maximum value of the signal lamp color display time;
Means for detecting the display time of the signal lamp color, and
The determination means includes
2. The apparatus according to claim 1, wherein when the display time detected by the means is smaller than the minimum value or larger than the maximum value, the signal generation means is determined to be abnormal. Item 5. The traffic signal controller according to any one of Items 4 to 6.   The traffic signal according to any one of claims 1 to 5, further comprising means for transmitting a notification signal for notifying that the control signal has been switched when the control signal is output by the output means. Control machine.

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