WO2013121513A1 - Traffic signal controller - Google Patents

Traffic signal controller Download PDF

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Publication number
WO2013121513A1
WO2013121513A1 PCT/JP2012/053319 JP2012053319W WO2013121513A1 WO 2013121513 A1 WO2013121513 A1 WO 2013121513A1 JP 2012053319 W JP2012053319 W JP 2012053319W WO 2013121513 A1 WO2013121513 A1 WO 2013121513A1
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WIPO (PCT)
Prior art keywords
circuit
sub
signal
cpu
abnormal
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PCT/JP2012/053319
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French (fr)
Japanese (ja)
Inventor
正宏 三浦
下浦　弘
政広 坂口
弘明 川西
吉村　公志
Original Assignee
住友電気工業株式会社
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Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Priority to PCT/JP2012/053319 priority Critical patent/WO2013121513A1/en
Publication of WO2013121513A1 publication Critical patent/WO2013121513A1/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights

Definitions

  • the present invention relates to a traffic signal controller that switches the color of a plurality of signal lamps.
  • the traffic signal controller switches the lamp color of each signal lamp based on the current color data including the lamp color information that defines the lamp color of each signal lamp and the display time of each lamp color for each step (step).
  • Patent Document 1 The traffic signal controller monitors whether or not its own state is normal. If the traffic signal controller determines that it is impossible to control the lamp color with the normal three-color lamp colors (red, yellow, and blue) based on the present display data determined in advance, Based on the flash signal, the signal lamp is flashed (for example, a combination of flashing yellow and flashing red, flashing red, etc.) to alert the vehicle or pedestrian and prevent traffic accidents. Yes.
  • FIG. 8 is a block diagram showing a configuration example of a conventional traffic signal controller 200.
  • the traffic signal controller 200 includes a CPU 201, a sub circuit 202, current data 203, a clock detection circuit 204, an OR circuit 205, a flash circuit 206, a lamp color output circuit 207, and the like.
  • the CPU 201 sends a step command for switching the color of each signal lamp 1 to the sub circuit 202 based on the display data 203.
  • the sub circuit 202 outputs a lamp color signal to the OR circuit 205 based on the step command sent by the CPU 201.
  • the OR circuit 205 outputs the lamp color signal output from the sub-circuit 202 to the lamp color output circuit 207 at normal time (normal time).
  • the lamp color output circuit 207 drives the signal lamp device 1 by converting the lamp color signal into a predetermined voltage (for example, AC 100 V). Thereby, the signal lamp device 1 switches the lamp color based on the display data.
  • the sub circuit 202 sends a clock signal to the clock detection circuit 204.
  • the clock detection circuit 204 outputs a clock signal abnormality to the sub circuit 202 when the clock signal transmitted from the sub circuit 202 is not normal.
  • the sub circuit 202 instructs the flash circuit 206 so that the flash circuit 206 sends the flash signal to the OR circuit 205, and at the same time, the sub circuit 202 outputs the lamp color signal to the OR circuit 205.
  • the OR circuit 205 outputs the flash signal to the lamp color output circuit 207. Thereby, the signal lamp device 1 performs flash display.
  • FIG. 9 is a block diagram illustrating a configuration example of the traffic signal controller 300 with improved safety.
  • the traffic signal controller 300 includes a CPU 301, a sub circuit 302, current data 303, a monitoring circuit 304, a switching circuit 305, a flash circuit 306, a lamp color output circuit 307, and the like.
  • the CPU 301 sends a step command for switching the lamp color of each signal lamp 1 to the sub circuit 302 based on the display data 303. Further, the CPU 301 determines normality / abnormality of the sub-circuit 302 based on the determination of the clock signal from the sub-circuit 302 or the state indicating which step is being output, and sends the determination result to the monitoring circuit 304.
  • the sub circuit 302 outputs a lamp color signal to the switching circuit 305 based on the step command sent by the CPU 301.
  • the sub-circuit 302 determines normality / abnormality of the CPU 301 based on the longest / shortest determination of the step width of the step command from the CPU 301 or the step pulse interval, and the determination result (for example, “CPU abnormality”) is monitored. To send. In addition, the sub circuit 302 sends a WD (Watch Dog) signal, which is a clock signal indicating that it is operating, to the monitoring circuit 304. That is, the sub circuit 302 transmits a WD signal when it is operating, and does not transmit a WD signal when it is not operating.
  • WD Watch Dog
  • the sub-circuit 302 determines that there is an inconvenience in the display data 303, the sub-circuit 302 determines that there is an abnormality, stops the lamp color control based on the display data 303, and causes the signal lamp device 1 to flash display. Is sent to the monitoring circuit 304.
  • the monitoring circuit 304 When the monitoring circuit 304 acquires a flash command from the sub circuit 302, the monitoring circuit 304 sends a signal to the switching circuit 305 to switch to flash display.
  • the switching circuit 305 outputs the lamp color signal output from the sub circuit 302 to the lamp color output circuit 307 during normal time (normal time).
  • the lamp color output circuit 307 drives the signal lamp device 1 by converting the lamp color signal into a predetermined voltage (for example, AC 100 V). Thereby, the signal lamp device 1 switches the lamp color based on the display data. Further, when the switching circuit 305 acquires a signal for switching to flash display from the monitoring circuit 304, the switching circuit 305 stops outputting the lamp color signal from the sub circuit 302 to the lamp color output circuit 307, and the flash circuit 306 continues to output. The flashing signal is output to the lamp color output circuit 307. Thereby, the signal lamp device 1 performs flash display.
  • a dedicated signal line (communication line) was used for the flash command from the sub circuit 302 to the monitoring circuit 304, but the flash command signal line became abnormal. In this case, the flash display is not switched. For this reason, an abnormal lamp color signal from the sub circuit 302 may be output to the lamp color output circuit 307.
  • the sub circuit 302 is not actually abnormal due to an abnormality of a signal line (communication line) input from the CPU 301 to the monitoring circuit 304, but the “sub circuit abnormality”. There was a situation where it was not possible to recognize that the flash display state was made despite the flash display being performed.
  • the present invention has been made in view of such circumstances, and even when an abnormality such as a signal line (communication line) occurs, a traffic signal that can avoid the influence of the abnormality and realize safe lamp color control.
  • the object is to provide a controller.
  • a traffic signal controller is based on a main control unit that outputs a step command for switching the lamp color of a signal lamp based on lamp color information, and a step command output by the main control unit.
  • a traffic signal controller including a sub-control unit that outputs a lamp color signal, the sub-control unit determines normality / abnormality of the main control unit, and sends a determination result at a predetermined interval.
  • a monitoring unit that monitors a determination result sent by the sub-control unit, wherein the monitoring unit determines normality / abnormality of the sub-control unit according to whether or not the determination result can be acquired by the sub-control unit; When it is determined that the unit is abnormal, a flash instruction signal for flashing the signal lamp is output.
  • the traffic signal controller according to a second aspect of the present invention is the traffic signal controller according to the first aspect, wherein the sub-control unit determines whether it is normal or abnormal and stops sending the determination result when it is determined to be abnormal. It is characterized by being.
  • the monitoring unit sends an instruction signal indicating whether or not to flash the signal lamp to the main control unit. It is characterized by that.
  • a traffic signal controller is characterized in that, in the third aspect of the invention, the traffic signal controller further comprises a notification unit for notifying the outside of a determination result corresponding to the instruction signal sent by the monitoring unit.
  • the sub-control unit determines normality / abnormality of the main control unit, and sends a determination result at a predetermined interval.
  • the monitoring unit monitors the determination result sent from the sub-control unit, and determines normality / abnormality of the sub-control unit according to whether the sub-control unit can acquire the determination result. For example, the monitoring unit determines that the sub-control unit is abnormal when the determination result transmitted from the sub-control unit at a predetermined interval cannot be acquired at the predetermined interval.
  • the monitoring unit determines that the sub-control unit is abnormal, the monitoring unit outputs a flash instruction signal for flashing the signal lamp.
  • the sub-control unit sends a WD signal, which is a predetermined pulse signal, to the monitoring unit (monitoring circuit) every time a predetermined time is passed.
  • a WD signal which is a predetermined pulse signal
  • the monitoring unit monitoring circuit
  • the sub-control unit can transmit the determination result and be acquired by the monitoring unit.
  • a signal line (communication line) for transmitting the normality / abnormality of the CPU becomes unnecessary, and the cause of the abnormality of the signal line is eliminated. Therefore, it is possible to prevent a situation in which the main control unit is erroneously determined to be abnormal due to an abnormality in the signal line.
  • the signal line for the WD signal and the signal line for transmitting the abnormality of the CPU are required, whereas the main control unit Therefore, the signal line (communication line) can be reduced.
  • the sub-control unit determines its own normality / abnormality, and when it is determined to be abnormal, stops sending the determination result.
  • the normality / abnormality of itself can be determined, for example, based on whether or not the displayed data is correct.
  • a signal line for sending a flash command is provided between the sub-control unit (sub-circuit) and the monitoring unit (monitoring circuit).
  • “send flash command / not send to monitoring unit” is expressed as “send / stop sending WD signal including determination result of main control unit to monitoring unit every predetermined time”.
  • Flash command signal lines can be reduced. As a result, it is possible to eliminate the cause of the abnormality of the signal line, so that the situation where the flash display is not switched to can be prevented, and an abnormal lamp color signal is sent from the sub-control unit to the lamp color output circuit. It is also possible to prevent the situation of being output.
  • the signal line for the WD signal and the signal line for transmitting the flash command are necessary, whereas the sub-control unit has Since the result of own determination to be performed is incorporated into the WD signal, signal lines (communication lines) can be reduced.
  • the monitoring unit sends an instruction signal indicating whether or not to flash the signal lamp to the main control unit. For example, when the main control unit determines that “the sub control unit is abnormal” and the sub control unit determines that “the main control unit is normal”, the monitoring unit displays an instruction signal for performing flash display. However, when the monitoring unit does not send an instruction signal for flashing, the main control unit has an abnormality such as a signal line (communication line) around the monitoring unit or the monitoring unit. Then it can be determined.
  • a signal line communication line
  • the monitoring unit erroneously determines that the sub-control unit is abnormal, and when the instruction signal to flash display is sent from the monitoring unit, the main control unit, It can be determined that the flash display is erroneously performed.
  • a notification unit for notifying the outside of a determination result corresponding to the instruction signal sent from the monitoring unit.
  • the notification unit for example, can notify the external host device of an abnormality according to the presence or absence of a flash display using a communication line, or can turn on or blink an indicator lamp provided in the traffic signal controller. Abnormalities can be notified. As a result, it is possible to promptly report an abnormality such as when the flash display is erroneously performed or when the flash display is not erroneously performed.
  • a signal line (communication line) for transmitting a conventional CPU abnormality becomes unnecessary, and a signal line abnormality occurs. Since the factor can be removed, it is possible to prevent a situation where the main control unit is erroneously determined to be abnormal.
  • FIG. 1 is a block diagram showing an example of the configuration of the traffic signal controller 100 according to the present embodiment.
  • the traffic signal controller 100 includes a CPU 10 as a main control unit, a sub circuit 11 as a sub control unit, a monitoring circuit 12 as a monitoring unit, display data 13, a switching circuit 14, a flash circuit 15, a lamp color output circuit 16, An interface unit 17 and a notification unit 18 are provided.
  • the sub-circuit 11 is configured by a hardware circuit such as an FPGA (Field Programmable Gate Gate Array).
  • the CPU 10 sends the lamp color display state recognized by the CPU 10 to the sub circuit 11 every predetermined time T1 (for example, 0.5 seconds, 1 second, etc.).
  • a conventional step command is included in the lamp color display state. That is, the CPU 10 sends a lamp color display state indicating the current level to the sub-circuit 11 every predetermined time T1, and indicates the next level only at the timing of switching the color of the signal lamp 1 (stepping timing). Sends the color display status.
  • the lamp color display state indicating the next floor corresponds to the step command.
  • CPU10 transmits again the lamp color display state which shows the same level as the last sent.
  • the display data 13 used for switching the lamp color of the signal lamp 1 includes, for example, lamp color information indicating the state of each lamp color (lit or extinguished) for each step, the order of the lamp colors, and the standard display seconds for each step. Number (reference display time), shortest display seconds (shortest display time), longest display seconds (longest display time), floor type (for example, indicate the category of long, middle, short, etc.), security seconds Each information such as operation settings is included.
  • CPU 10 determines normality / abnormality of sub-circuit 11 and outputs the determination result to monitoring circuit 12. Details of the normal / abnormal determination of the sub-circuit 11 by the CPU 10 will be described later.
  • the sub-circuit 11 outputs a lamp color signal for switching the lamp color of the signal lamp device 1 to the switching circuit 14 and the CPU 10 based on the step command sent by the CPU 10.
  • the sub circuit 11 sends the CPU 10 the lamp color display state recognized by the sub circuit 11 every predetermined time T2 (for example, 0.5 seconds, 1 second, etc.).
  • the sub-circuit 11 determines normality / abnormality of the CPU 10 and sends a determination result to the CPU 10 every predetermined time T3 (for example, 0.5 seconds, 1 second, etc.).
  • the predetermined time T1, the predetermined time T2, and the predetermined time T3 may be the same value or different values.
  • One signal line (communication line) is disposed between the sub circuit 11 and the monitoring circuit 12, and information transmission / acquisition between the sub circuit 11 and the monitoring circuit 12 is performed using the signal line. Done with.
  • the sub-circuit 11 determines normality / abnormality of the CPU 10 and sends a determination result to the monitoring circuit 12 at a predetermined interval. Details of normal / abnormal determination of the CPU 10 by the sub-circuit 11 will be described later.
  • the sub-circuit 11 determines its own normal / abnormality, and if it is determined to be normal, the determination result of “sub-circuit 11 is normal” is sent at a predetermined interval (for example, 1 ms, 10 ms, 100 ms, etc.) And when it is determined that there is an abnormality, the transmission of the determination result is stopped.
  • the normality / abnormality of itself can be determined by, for example, whether or not the display data 13 is correct.
  • the sub-circuit 11 incorporates the determination result “normal / abnormal” of the CPU 10 and sends it to the monitoring circuit 12 when sending “sub-circuit 11 normal”, which is its own determination result, to the monitoring circuit 12.
  • the determination result transmitted from the sub-circuit 11 to the monitoring circuit 12 is different depending on whether the sub-circuit 12 determines “CPU is normal” or “CPU is abnormal”.
  • the signal to be sent is a binarized signal (repetitive pulse of high level and low level)
  • the high level time is made longer than the low level time and the CPU is abnormal
  • the high level time can be made shorter than the low level time.
  • the determination result sent from the sub-circuit 11 to the monitoring circuit 12 is periodic communication data, and one of the contents of the communication data includes “CPU normal / abnormal determination”. Information can also be incorporated.
  • the monitoring circuit 12 acquires a determination result of “normal / abnormal of the sub circuit 11” from the CPU 10.
  • the monitoring circuit 12 determines normality / abnormality of the subcircuit 11 according to whether or not the determination result of “subcircuit 11 is normal” has been acquired from the subcircuit 11 at a predetermined interval. For example, the monitoring circuit 12 determines that the sub circuit 11 is abnormal when the sub circuit 11 cannot obtain its own determination result of “sub circuit 11 is normal” at a predetermined interval.
  • the monitoring circuit 12 determines that the sub circuit 11 is normal when the sub circuit 11 acquires its own determination result of “sub circuit 11 is normal” at a predetermined interval.
  • the “normal / abnormal CPU 10” sent from the sub circuit 11 at the same timing. Get the judgment result. That is, when the monitoring circuit 12 cannot acquire its own determination result “sub-circuit 11 is normal” from the sub-circuit 11 at a predetermined interval, it also acquires the determination result “normal / abnormal” of the CPU 10 at a predetermined interval. I can't.
  • the monitoring circuit 12 determines the normality / abnormality of the subcircuit 11 according to whether or not the determination result of “normal / abnormality of the CPU 10” can be acquired from the subcircuit 11 at a predetermined interval. For example, the monitoring circuit 12 determines that the sub circuit 11 is abnormal when the determination result “normal / abnormal” of the CPU 10 cannot be obtained from the sub circuit 11 at a predetermined interval.
  • the monitoring circuit 12 determines normality / abnormality of the CPU 10 and normality / abnormality of the sub-circuit 11 based on the acquired determination result, and sends a switching signal to the switching circuit 14 and the CPU 10 according to the determination result.
  • the switching signal determines whether the switching circuit 14 outputs the lamp color signal output from the sub-circuit 11 to the lamp color output circuit 16 or the flash signal output from the flash circuit 15 to the lamp color output circuit 16.
  • This signal includes an instruction signal indicating that the monitoring circuit 12 performs flash display. The determination method and processing by the monitoring circuit 12 will be described later.
  • the flash circuit 15 sends a flash signal for flashing each signal lamp 1 to the switching circuit 14.
  • the flashing display means a state in which, for example, when the main road and the secondary road intersect, the signal lamp 1 for the main road blinks in yellow, and the signal lamp 1 for the secondary road blinks in red. Further, it means a state in which the signal lamp 1 for the main road blinks red and the signal lamp 1 for the secondary road blinks red.
  • the flashing display is not limited to yellow flashing red flashing and red flashing red flashing.
  • the switching circuit 14 switches to the lamp color signal output from the sub-circuit 11 or switches to the flash signal output from the flash circuit 15 based on the switching signal sent out by the monitoring circuit 12.
  • the switching circuit 14 outputs either the lamp color signal or the flash signal to the lamp color output circuit 16.
  • the lamp color output circuit 16 drives each signal lamp 1 based on the lamp color signal or flash signal output from the switching circuit 14. Specifically, the lamp color output circuit 16 converts the lamp color signal or the flash signal into AC 100 V or a required voltage, and turns on the lamp or LED (light emitting diode) of the signal lamp unit 1.
  • the CPU 10 determines that the sub circuit 11 is abnormal when the lamp color display state sent out by the sub circuit 11 cannot be acquired even after the predetermined time T2.
  • the CPU 10 determines that the sub circuit 11 is abnormal when the lamp color display state held by the CPU 10 and the lamp color display state sent by the sub circuit 11 do not match. Thereby, even if the sub circuit 11 is operating, it is possible to prevent an unintended lamp color output that cannot be detected in the prior art.
  • the CPU 10 determines that the sub circuit 11 is abnormal when the combination of the lamp colors of the lamp color signals output from the sub circuit 11 is prohibited.
  • the combination in which the lamp colors are prohibited refers to, for example, a blue-blue state in which the lamp colors of the signal lamps for the intersecting roads are simultaneously blue.
  • the CPU 10 acquires the lamp color signal output from the sub circuit 11 to the switching circuit 14, the lamp color display state held by itself, and the lamp color display state based on the lamp color signal output from the sub circuit 11 to the switching circuit 14. If they do not match, it is determined that the sub-circuit 11 is abnormal. Thereby, even if the sub circuit 11 is operating, it is possible to prevent an unintended lamp color output that cannot be detected in the prior art.
  • the sub circuit 11 cannot acquire the determination result of “normal / abnormal CPU 10” from the sub circuit 11 even after the predetermined time T3 (for example, 0.5 second, 1 second, etc.) has elapsed, It is determined that the sub circuit 11 is abnormal. Thereby, it is possible to detect an abnormality of the sub-circuit 11 or an abnormality such as a signal line that could not be detected conventionally.
  • T3 for example, 0.5 second, 1 second, etc.
  • the sub circuit 11 determines that the CPU 10 is abnormal when the lamp color display state sent out by the CPU 10 cannot be acquired within a predetermined time T1 (for example, 0.5 seconds, 1 second, etc.). Since normality / abnormality of the CPU 10 can be determined within the predetermined time T1, the abnormal state of the CPU 10 cannot be detected until the maximum guaranteed number of seconds (for example, 110 seconds) elapses as in the prior art. Can be avoided for a long time, and an abnormality can be detected without waiting for the longest guarantee time to elapse. In addition, since the abnormality of the CPU 10 can be detected even after the floor retention command, it is possible to avoid a situation in which the floor step cannot be performed.
  • T1 for example, 0.5 seconds, 1 second, etc.
  • the sub circuit 11 determines that the CPU 10 is abnormal when it cannot acquire the step command from the CPU 10 within a predetermined designated range (for example, 0.5 to 1 second). For example, the sub-circuit 11 determines that the CPU 10 is abnormal when the interval of the step command output by the CPU 10 is shorter or longer than a predetermined designated range. Thereby, abnormality of CPU10 can be detected in a shorter time than before.
  • a predetermined designated range for example, 0.5 to 1 second.
  • FIG. 2 is an explanatory diagram illustrating an example of determination results and processing by the monitoring circuit 12 according to the present embodiment.
  • the determination result acquired and monitored by the monitoring circuit 12 includes the determination result of the sub circuit 11 (normal / abnormality of the sub circuit 11 itself and normal / abnormality of the CPU 10) and the determination result of the CPU 10 ( The sub-circuit 11 is normal / abnormal), and the processing of the monitoring circuit 12 differs depending on the combination of these determination results.
  • the monitoring circuit 12 is normal for both the sub circuit 11 and the CPU 10. It is determined that there is, and no special processing is performed. In this case, a step based on a step command from the CPU 10 is performed.
  • the monitoring circuit 12 indicates that the sub circuit 11 is abnormal.
  • the CPU 10 determines that it is normal, and sends a switching signal to the switching circuit 14 to switch to the flash signal from the flash circuit 15 to give a flash display instruction. In this case, flash display is performed.
  • the monitoring circuit 12 indicates that the sub circuit 11 is normal, It is determined that the CPU 10 is abnormal, and no special processing is performed. In this case, stepping based on self-determination of the sub-circuit 11 is performed. Thereby, even if abnormality of CPU10 is detected, the lamp color of the signal lamp device 1 can be switched continuously.
  • the monitoring circuit 12 indicates that the sub circuit 11 is normal, It is determined that the CPU 10 is abnormal, and no special processing is performed. In this case, stepping based on self-determination of the sub-circuit 11 is performed. Thereby, even if abnormality of CPU10 is detected, the lamp color of the signal lamp device 1 can be switched continuously.
  • the monitoring circuit 12 determines that the sub-circuit 11 is abnormal and switches the switching signal to the flash circuit 15 from the flash circuit 15. To display flash. In this case, flash display is performed.
  • the sub-circuit 11 determines normality / abnormality of the CPU 10 and sends a determination result to the monitoring circuit 12 at a predetermined interval.
  • the monitoring circuit 12 monitors the determination result sent from the sub circuit 11 and determines normality / abnormality of the sub circuit 11 according to whether or not the determination result by the sub circuit 11 can be acquired. For example, the monitoring circuit 12 determines that the sub circuit 11 is abnormal when the determination result transmitted from the sub circuit 11 at a predetermined interval cannot be obtained at the predetermined interval.
  • the monitoring circuit 12 determines that the sub-circuit 11 is abnormal, the monitoring circuit 12 outputs a flash instruction signal (switching signal) for causing the signal lamp device 1 to flash display.
  • the sub-circuit 302 sends a WD signal, which is a predetermined pulse signal, to the monitoring circuit 304 every predetermined time. Is acquired from the sub circuit 302 within the predetermined time, it is determined that the sub circuit 302 is normal, and when it cannot be acquired within the predetermined time, the sub circuit 302 is determined to be abnormal. Therefore, in the present embodiment, if the determination result for the CPU 10 performed by the sub circuit 11 is incorporated in the WD signal and transmitted, the sub circuit 11 transmits the determination result and is acquired by the monitoring circuit 12. If the sub-circuit 11 is normal and the sub-circuit 11 does not send out the determination result and cannot be acquired by the monitoring circuit 12, it can be determined that the sub-circuit 11 is abnormal. .
  • the normal / abnormal determination result of the CPU 10 is incorporated into the WD signal, whereby a signal line (communication line) for transmitting the normal / abnormal CPU (for example, traffic signal control illustrated in FIG. 9).
  • the determination result signal line between the sub circuit 302 and the monitoring circuit 304 in the machine 300 is not necessary, and the cause of the signal line abnormality can be eliminated. It is possible to prevent a situation that is determined to be abnormal. Further, in the present embodiment, it is possible to prevent a situation in which the flash circuit is not switched to the above-described flash display when an abnormality occurs in the sub circuit 11, so that an abnormal lamp color signal is output from the sub circuit 11 to the lamp color output circuit. It is also possible to prevent the situation of being output.
  • the signal line for the WD signal and the signal line for transmitting the abnormality of the CPU are required.
  • signal lines communication lines
  • the sub-circuit 11 determines its own normality / abnormality, and when it is determined to be abnormal, it stops sending the determination result.
  • the normality / abnormality of the sub-circuit 11 itself can be determined by, for example, whether the display data 13 is correct.
  • “send flash command / not send to monitoring circuit 12” means “send / send WD signal including determination result of CPU 10 to monitoring circuit 12 every predetermined time”. Since it is expressed as “stop”, the flash command signal line (for example, the flash command signal line between the sub circuit 302 and the monitoring circuit 304 in the traffic signal controller 300 illustrated in FIG. 9) can be reduced. As a result, the cause of the abnormality of the signal line can be removed, so that the situation where the flash display is not switched to can be prevented, and an abnormal lamp color signal is sent from the sub circuit 11 to the lamp color output circuit. It is also possible to prevent the situation of being output.
  • the traffic signal controller 300 initially examined by the inventors required two signal lines, a signal line for transmitting a WD signal and a signal line for transmitting a flash command.
  • signal lines communication lines
  • the monitoring circuit 12 sends to the CPU 10 an instruction signal (switching signal) indicating whether or not the signal lamp device 1 is flash-displayed. For example, when the CPU 10 determines that “the sub-circuit 11 is abnormal” and the sub-circuit 11 determines that “the CPU 10 is normal”, the monitoring circuit 12 displays an instruction signal (switching signal) for performing flash display. ), But when the monitoring circuit 12 does not transmit an instruction signal (switching signal) for performing flash display, the CPU 10 or the signal line (communication line) around the monitoring circuit 12 ) And the like can be determined to exist.
  • an instruction signal switching signal
  • the CPU 10 determines that the flash display is erroneously performed.
  • the notification part 18 notifies the determination result according to the instruction
  • the notification unit 18 can notify, for example, an abnormality according to the presence / absence of a flashing display to the external host device 300 using a communication line via the interface unit 17, or is provided in the traffic signal controller 100. An abnormality can be notified by turning on or blinking an indicator lamp or the like. As a result, it is possible to promptly report an abnormality such as when the flash display is erroneously performed or when the flash display is not erroneously performed.
  • FIG. 3 is a flowchart illustrating an example of a processing procedure of the CPU 10 according to the present embodiment.
  • the CPU 10 performs normal / abnormal determination processing of the sub-circuit 11 (S11).
  • the CPU 10 determines whether or not the sub circuit 11 is abnormal (S12), and determines that “the sub circuit 11 is abnormal” (YES in S12), the determination result “sub circuit 11 is abnormal”
  • the data is sent to the monitoring circuit 12 at intervals (S13).
  • the CPU 10 determines whether or not the determination result “CPU 10 is normal” has been acquired from the sub-circuit 11 (S14). If the determination result “CPU 10 is normal” is acquired (YES in S14), the monitoring circuit 12 A switching signal to be sent is acquired (S15). When the CPU 10 acquires the determination result “CPU 10 is normal” from the sub circuit 11, the CPU 10 determines that “the sub circuit 11 is abnormal” and the sub circuit 11 determines that “the CPU 10 is normal”. The monitoring circuit 12 should have output a switching signal to perform flash display.
  • the CPU 10 determines whether or not the acquired switching signal is a switching signal for switching to flash display (S16). If the switching signal is not a switching signal for switching to flash display (NO in S16), the monitoring circuit 12 or the like is abnormal. Is displayed on the indicator lamp, or is notified to the host device 300 (S17), and the process is terminated.
  • the CPU 10 determines that the monitoring circuit 12 and the like are normal, and ends the process without performing the process of step S17.
  • the CPU 10 sends a determination result of “sub circuit 11 is normal” to the monitoring circuit 12 at a predetermined interval (S18).
  • the CPU 10 determines whether or not the determination result of “CPU is normal” is acquired from the sub-circuit 11 (S19), and when the determination result of “CPU is normal” is acquired (YES in S19), the process is terminated. .
  • the CPU 10 If the determination result “CPU is normal” is not acquired (NO in S19), the CPU 10 notifies that the output is from the sub-circuit 11 (S20), and the process is terminated. If the determination result “CPU 10 is normal” cannot be acquired from the sub-circuit 11 (NO in S14), the CPU 10 ends the process. In this case, since the CPU 10 determines that “the sub circuit 11 is abnormal” and the sub circuit 11 determines that “the CPU 10 is abnormal”, the determination result “CPU 10 is abnormal” by the sub circuit 11 is given priority. .
  • FIG. 4 is a flowchart showing another example of the processing procedure of the CPU 10 of the present embodiment. Note that the processing shown in FIG. 3 and the processing shown in FIG. 4 are performed independently.
  • the CPU 10 acquires a switching signal from the monitoring circuit 12 (S31), and determines whether or not the acquired switching signal is a switching signal for switching to a lamp color signal (S32).
  • the CPU 10 When the signal is a switching signal for switching to the lamp color signal (YES in S32), the CPU 10 notifies the lamp color display state acquired from the sub circuit 11 and the determination result for the sub circuit 11 with the display lamp or notifies the host device 300. (S33), the process ends.
  • the CPU 10 If it is not a switching signal for switching to the lamp color signal (NO in S32), the CPU 10 has acquired a switching signal for switching to the flash signal from the monitoring circuit 12, and therefore notifies the fact that it is in the flash signal output state with the indicator lamp. Or, the host device 300 is notified (S34), and the process is terminated.
  • FIG. 5 is a flowchart showing an example of the processing procedure of the sub-circuit 11 of the present embodiment.
  • the sub-circuit 11 performs normal / abnormal determination processing of the CPU 10 (S41).
  • the sub-circuit 11 determines whether or not the CPU 10 is normal (S42). When it is determined that “CPU 10 is normal” (YES in S42), the determination result that “CPU 10 is normal” is monitored at a predetermined interval.
  • the data is sent to the circuit 12 (S43), and the process is terminated.
  • FIG. 6 is a flowchart showing another example of the processing procedure of the sub-circuit 11 of the present embodiment. Note that the processing shown in FIG. 5 and the processing shown in FIG. 6 are performed independently.
  • the sub-circuit 11 performs self-diagnosis processing (S51).
  • the self-diagnosis process is, for example, a process in which the sub-circuit 11 diagnoses normal / abnormality of internal data such as the display data 13 at a constant cycle.
  • the sub-circuit 11 determines whether or not it is normal by self-diagnosis (S52). If it is determined that it is normal (YES in S52), the self-diagnosis result (determination) is “sub-circuit 11 is normal”. The result is sent to the monitoring circuit 12 at a predetermined interval (S53), and the process is terminated. In step S53, when the self-diagnosis result “sub-circuit 11 is normal” is sent, it is sent at the same timing including the determination result in step S43 or step S44 in FIG.
  • the sub-circuit 11 stops sending the self-diagnosis result (determination result) that “the sub-circuit 11 is normal” (S54), and ends the process.
  • the monitoring circuit 12 can determine that the sub-circuit 11 is abnormal by detecting that the self-diagnosis result that “the sub-circuit 11 is normal” is not transmitted at a predetermined interval.
  • FIG. 7 is a flowchart showing an example of the processing procedure of the monitoring circuit 12 of the present embodiment.
  • the monitoring circuit 12 determines whether or not the determination result from the sub circuit 11 is acquired at a predetermined interval (S61). When the monitoring circuit 12 acquires the determination result at a predetermined interval (YES in S61), the determination result of the sub circuit 11 is “ It is determined whether or not the CPU 10 is “abnormal” (S62).
  • the monitoring circuit 12 determines whether the determination result of the CPU 10 is “sub circuit 11 is abnormal” (S63). When the determination result of the CPU 10 is “sub circuit 11 is abnormal” (YES in S63), the monitoring circuit 12 outputs a switching signal for switching to flash display (S64), and the process is terminated.
  • the monitoring circuit 12 determines that the sub circuit 11 of the CPU 10 is also normal, and ends the process without performing the process of step S64. .
  • the monitoring circuit 12 determines that the sub circuit 11 is abnormal, and performs the process of step S64.
  • the determination result of the sub circuit 11 is “CPU 10 is abnormal” (YES in S62)
  • the monitoring circuit 12 ends the process on the assumption that the step based on the self determination of the sub circuit 11 is being performed.

Abstract

Provided is a traffic signal controller that makes it possible to avoid the impact of an abnormality and safely carry out light color control even when an abnormality occurs in a signal line (communication line) or the like. A sub-circuit (11) determines whether a CPU (10) is normal or abnormal, and sends the determination result to a monitoring circuit (12) at a predetermined interval. The monitoring circuit (12) monitors the results sent by the sub-circuit (11) and determines whether the sub-circuit (11) is normal or abnormal in accordance with whether or not determination results can be acquired from the sub-circuit (11). For example, if the monitoring circuit (12) is unable to acquire at a predetermined interval the determination results sent at a predetermined interval from the sub-circuit (11), the monitoring circuit (12) determines that the sub-circuit (11) is abnormal. When the monitoring circuit (12) has determined that the sub-circuit (11) is abnormal, the monitoring circuit (12) outputs a switching signal that causes a signal light unit (1) to display a flashing light.

Description

交通信号制御機Traffic signal controller
　本発明は、複数の信号灯器の灯色を切り替える交通信号制御機に関する。 The present invention relates to a traffic signal controller that switches the color of a plurality of signal lamps.
　交通信号制御機は、ステップ（階梯）毎に各信号灯器の灯色を定めた灯色情報、各灯色の表示時間などを含む現示データに基づいて、各信号灯器の灯色を切り替える（特許文献１参照）。そして、交通信号制御機は、自身の状態が正常であるか否かを監視している。交通信号制御機は、予め定められた現示データに基づいて、信号灯器の正常な３色灯色（赤、黄、青）での灯色制御ができないと判定した場合には、閃光回路からの閃光信号に基づいて、信号灯器を閃光表示（例えば、黄色点滅と赤色点滅の組み合わせ、赤色点滅など）することにより、車両又は歩行者に対して注意を促し、交通事故を未然に防止している。 The traffic signal controller switches the lamp color of each signal lamp based on the current color data including the lamp color information that defines the lamp color of each signal lamp and the display time of each lamp color for each step (step). Patent Document 1). The traffic signal controller monitors whether or not its own state is normal. If the traffic signal controller determines that it is impossible to control the lamp color with the normal three-color lamp colors (red, yellow, and blue) based on the present display data determined in advance, Based on the flash signal, the signal lamp is flashed (for example, a combination of flashing yellow and flashing red, flashing red, etc.) to alert the vehicle or pedestrian and prevent traffic accidents. Yes.
　図８は従来の交通信号制御機２００の構成例を示すブロック図である。図８に示すように、交通信号制御機２００は、ＣＰＵ２０１、サブ回路２０２、現示データ２０３、クロック検出回路２０４、ＯＲ回路２０５、閃光回路２０６、灯色出力回路２０７などを備える。 FIG. 8 is a block diagram showing a configuration example of a conventional traffic signal controller 200. As shown in FIG. 8, the traffic signal controller 200 includes a CPU 201, a sub circuit 202, current data 203, a clock detection circuit 204, an OR circuit 205, a flash circuit 206, a lamp color output circuit 207, and the like.
　ＣＰＵ２０１は、現示データ２０３に基づいて各信号灯器１の灯色を切り替えるための歩進指令をサブ回路２０２へ送出する。サブ回路２０２は、ＣＰＵ２０１が送出した歩進指令に基づいて、灯色信号をＯＲ回路２０５へ出力する。ＯＲ回路２０５は、通常時（正常時）には、サブ回路２０２が出力した灯色信号を灯色出力回路２０７へ出力する。灯色出力回路２０７は、灯色信号を所定の電圧（例えば、ＡＣ１００Ｖなど）に変換して信号灯器１を駆動する。これにより、信号灯器１は、現示データに基づいて灯色が切り替わる。 The CPU 201 sends a step command for switching the color of each signal lamp 1 to the sub circuit 202 based on the display data 203. The sub circuit 202 outputs a lamp color signal to the OR circuit 205 based on the step command sent by the CPU 201. The OR circuit 205 outputs the lamp color signal output from the sub-circuit 202 to the lamp color output circuit 207 at normal time (normal time). The lamp color output circuit 207 drives the signal lamp device 1 by converting the lamp color signal into a predetermined voltage (for example, AC 100 V). Thereby, the signal lamp device 1 switches the lamp color based on the display data.
　また、サブ回路２０２は、クロック信号をクロック検出回路２０４へ送出する。クロック検出回路２０４は、サブ回路２０２が送出するクロック信号が正常ではない場合、サブ回路２０２に対してクロック信号異常を出力する。この場合、サブ回路２０２は、閃光回路２０６が閃光信号をＯＲ回路２０５へ送出するように閃光回路２０６に対して指示を行い、同時に、サブ回路２０２は、ＯＲ回路２０５への灯色信号の出力を停止する。ＯＲ回路２０５は、閃光信号を灯色出力回路２０７へ出力する。これにより、信号灯器１は閃光表示を行う。 Also, the sub circuit 202 sends a clock signal to the clock detection circuit 204. The clock detection circuit 204 outputs a clock signal abnormality to the sub circuit 202 when the clock signal transmitted from the sub circuit 202 is not normal. In this case, the sub circuit 202 instructs the flash circuit 206 so that the flash circuit 206 sends the flash signal to the OR circuit 205, and at the same time, the sub circuit 202 outputs the lamp color signal to the OR circuit 205. To stop. The OR circuit 205 outputs the flash signal to the lamp color output circuit 207. Thereby, the signal lamp device 1 performs flash display.
特開昭６２－１１１３９５号公報JP-A-62-1111395
　ところで、発明者らは、灯色制御の安全性を高める目的で新たな交通信号制御機の内部構成の構築を検討した。図９は安全性を高めた交通信号制御機３００の構成例を示すブロック図である。図９に示すように、交通信号制御機３００は、ＣＰＵ３０１、サブ回路３０２、現示データ３０３、監視回路３０４、切替回路３０５、閃光回路３０６、灯色出力回路３０７などを備える。 By the way, the inventors examined the construction of a new internal configuration of a traffic signal controller for the purpose of improving the safety of the light color control. FIG. 9 is a block diagram illustrating a configuration example of the traffic signal controller 300 with improved safety. As shown in FIG. 9, the traffic signal controller 300 includes a CPU 301, a sub circuit 302, current data 303, a monitoring circuit 304, a switching circuit 305, a flash circuit 306, a lamp color output circuit 307, and the like.
　ＣＰＵ３０１は、現示データ３０３に基づいて各信号灯器１の灯色を切り替えるための歩進指令をサブ回路３０２へ送出する。また、ＣＰＵ３０１は、サブ回路３０２からのクロック信号又はいずれのステップを出力しているかを示す状態などの判定により、サブ回路３０２の正常／異常を判定し、判定結果を監視回路３０４へ送出する。 The CPU 301 sends a step command for switching the lamp color of each signal lamp 1 to the sub circuit 302 based on the display data 303. Further, the CPU 301 determines normality / abnormality of the sub-circuit 302 based on the determination of the clock signal from the sub-circuit 302 or the state indicating which step is being output, and sends the determination result to the monitoring circuit 304.
　サブ回路３０２は、ＣＰＵ３０１が送出した歩進指令に基づいて、灯色信号を切替回路３０５へ出力する。 The sub circuit 302 outputs a lamp color signal to the switching circuit 305 based on the step command sent by the CPU 301.
　サブ回路３０２は、ＣＰＵ３０１からの歩進指令のパルス幅又は歩進パルスの間隔の最長・最短判定により、ＣＰＵ３０１の正常／異常を判定し、判定結果（例えば、「ＣＰＵ異常」）を監視回路３０４へ送出する。また、サブ回路３０２は、自身が動作していることを示すクロック信号であるＷＤ（Watch Dog）信号を監視回路３０４へ送出する。すなわち、サブ回路３０２は自身が動作している場合にはＷＤ信号を送出し、動作していない場合にはＷＤ信号を送出しない。また、サブ回路３０２は、現示データ３０３などに不都合があると判定した場合、自身に異常があるとして、現示データ３０３による灯色制御を停止して信号灯器１を閃光表示させるべく閃光指令を監視回路３０４へ送出する。 The sub-circuit 302 determines normality / abnormality of the CPU 301 based on the longest / shortest determination of the step width of the step command from the CPU 301 or the step pulse interval, and the determination result (for example, “CPU abnormality”) is monitored. To send. In addition, the sub circuit 302 sends a WD (Watch Dog) signal, which is a clock signal indicating that it is operating, to the monitoring circuit 304. That is, the sub circuit 302 transmits a WD signal when it is operating, and does not transmit a WD signal when it is not operating. If the sub-circuit 302 determines that there is an inconvenience in the display data 303, the sub-circuit 302 determines that there is an abnormality, stops the lamp color control based on the display data 303, and causes the signal lamp device 1 to flash display. Is sent to the monitoring circuit 304.
　監視回路３０４は、サブ回路３０２から閃光指令を取得した場合、閃光表示に切り替えるため信号を切替回路３０５へ送出する。 When the monitoring circuit 304 acquires a flash command from the sub circuit 302, the monitoring circuit 304 sends a signal to the switching circuit 305 to switch to flash display.
　切替回路３０５は、通常時（正常時）には、サブ回路３０２が出力した灯色信号を灯色出力回路３０７へ出力する。灯色出力回路３０７は、灯色信号を所定の電圧（例えば、ＡＣ１００Ｖなど）に変換して信号灯器１を駆動する。これにより、信号灯器１は、現示データに基づいて灯色が切り替わる。また、切替回路３０５は、監視回路３０４から閃光表示に切り替えるための信号を取得した場合、サブ回路３０２から灯色出力回路３０７への灯色信号の出力を停止し、閃光回路３０６が出力し続けている閃光信号を灯色出力回路３０７へ出力する。これにより、信号灯器１は閃光表示を行う。 The switching circuit 305 outputs the lamp color signal output from the sub circuit 302 to the lamp color output circuit 307 during normal time (normal time). The lamp color output circuit 307 drives the signal lamp device 1 by converting the lamp color signal into a predetermined voltage (for example, AC 100 V). Thereby, the signal lamp device 1 switches the lamp color based on the display data. Further, when the switching circuit 305 acquires a signal for switching to flash display from the monitoring circuit 304, the switching circuit 305 stops outputting the lamp color signal from the sub circuit 302 to the lamp color output circuit 307, and the flash circuit 306 continues to output. The flashing signal is output to the lamp color output circuit 307. Thereby, the signal lamp device 1 performs flash display.
　しかしながら、上述の交通信号制御機３００では、ＣＰＵ３０１が「サブ回路異常」と判定し、サブ回路３０２が「ＣＰＵ正常」と判定した場合には、閃光表示に切り替わるものの、ＣＰＵ３０１が「サブ回路異常」と判定した場合に、サブ回路３０２と監視回路３０４との間の判定結果用の信号線（通信線）等の異常により、ＣＰＵ３０１が正常であるにも関わらず「ＣＰＵ異常」と誤って判定されたときには、ＣＰＵ３０１もサブ回路３０２も両者異常の状態となる。この状態では、サブ回路３０２の判定結果が優先されるため、サブ回路３０２は正常であると判定されるとともに、ＣＰＵ３０１は異常であると判定されて、閃光表示に切り替わらないという事態になる。このため、サブ回路３０２からの異常な灯色信号が灯色出力回路３０７へ出力されるおそれがあった。 However, in the traffic signal controller 300 described above, when the CPU 301 determines “sub circuit abnormality” and the sub circuit 302 determines “CPU normal”, the CPU 301 switches to flashing display, but the CPU 301 indicates “sub circuit abnormality”. Is determined to be “CPU abnormality” due to an abnormality in the signal line (communication line) for the determination result between the sub circuit 302 and the monitoring circuit 304 even though the CPU 301 is normal. When this happens, both the CPU 301 and the sub-circuit 302 are in an abnormal state. In this state, since the determination result of the sub-circuit 302 is given priority, it is determined that the sub-circuit 302 is normal and the CPU 301 is determined to be abnormal, and the flash display is not switched. For this reason, an abnormal lamp color signal from the sub circuit 302 may be output to the lamp color output circuit 307.
　また、上述の交通信号制御機３００では、サブ回路３０２から監視回路３０４への閃光指令には、専用の信号線（通信線）を用いていたが、閃光指令用の信号線が異常となった場合、閃光表示に切り替わらないという事態になる。このため、サブ回路３０２からの異常な灯色信号が灯色出力回路３０７へ出力されるおそれがあった。 Further, in the traffic signal controller 300 described above, a dedicated signal line (communication line) was used for the flash command from the sub circuit 302 to the monitoring circuit 304, but the flash command signal line became abnormal. In this case, the flash display is not switched. For this reason, an abnormal lamp color signal from the sub circuit 302 may be output to the lamp color output circuit 307.
　また、上述の交通信号制御機３００では、ＣＰＵ３０１から監視回路３０４へ入力される信号線（通信線）等の異常により、サブ回路３０２が実際には異常ではないにも関わらず、「サブ回路異常」と判定され、閃光表示が行われているにも関わらず閃光表示状態になっていることを認識することができないという事態もあった。 In the traffic signal controller 300 described above, the sub circuit 302 is not actually abnormal due to an abnormality of a signal line (communication line) input from the CPU 301 to the monitoring circuit 304, but the “sub circuit abnormality”. There was a situation where it was not possible to recognize that the flash display state was made despite the flash display being performed.
　本発明は、斯かる事情に鑑みてなされたものであり、信号線（通信線）等の異常が発生した場合でも異常による影響を回避して安全な灯色制御を実現することができる交通信号制御機を提供することを目的とする。 The present invention has been made in view of such circumstances, and even when an abnormality such as a signal line (communication line) occurs, a traffic signal that can avoid the influence of the abnormality and realize safe lamp color control. The object is to provide a controller.
　第１発明に係る交通信号制御機は、灯色情報に基づいて信号灯器の灯色を切り替えるための歩進指令を出力する主制御部と、該主制御部が出力した歩進指令に基づいて灯色信号を出力する副制御部とを備える交通信号制御機において、前記副制御部は、前記主制御部の正常／異常を判定し、所定の間隔で判定結果を送出するようにしてあり、前記副制御部が送出する判定結果を監視する監視部を備え、該監視部は、前記副制御部による判定結果の取得可否に応じて該副制御部の正常／異常を判定し、前記副制御部が異常であると判定した場合、信号灯器を閃光表示させるための閃光指示信号を出力するように構成してあることを特徴とする。 A traffic signal controller according to a first aspect of the present invention is based on a main control unit that outputs a step command for switching the lamp color of a signal lamp based on lamp color information, and a step command output by the main control unit. In a traffic signal controller including a sub-control unit that outputs a lamp color signal, the sub-control unit determines normality / abnormality of the main control unit, and sends a determination result at a predetermined interval. A monitoring unit that monitors a determination result sent by the sub-control unit, wherein the monitoring unit determines normality / abnormality of the sub-control unit according to whether or not the determination result can be acquired by the sub-control unit; When it is determined that the unit is abnormal, a flash instruction signal for flashing the signal lamp is output.
　第２発明に係る交通信号制御機は、第１発明において、前記副制御部は、自身の正常／異常を判定し、異常であると判定した場合、前記判定結果の送出を停止するように構成してあることを特徴とする。 The traffic signal controller according to a second aspect of the present invention is the traffic signal controller according to the first aspect, wherein the sub-control unit determines whether it is normal or abnormal and stops sending the determination result when it is determined to be abnormal. It is characterized by being.
　第３発明に係る交通信号制御機は、第１発明又は第２発明において、前記監視部は、信号灯器を閃光表示させるか否かを示す指示信号を前記主制御部へ送出するようにしてあることを特徴とする。 In the traffic signal controller according to a third aspect of the present invention, in the first or second aspect of the invention, the monitoring unit sends an instruction signal indicating whether or not to flash the signal lamp to the main control unit. It is characterized by that.
　第４発明に係る交通信号制御機は、第３発明において、前記監視部が送出した指示信号に応じた判定結果を外部へ通知する通知部を備えることを特徴とする。 A traffic signal controller according to a fourth aspect of the invention is characterized in that, in the third aspect of the invention, the traffic signal controller further comprises a notification unit for notifying the outside of a determination result corresponding to the instruction signal sent by the monitoring unit.
　第１発明にあっては、副制御部は、主制御部の正常／異常を判定し、所定の間隔で判定結果を送出する。監視部は、副制御部が送出した判定結果を監視し、副制御部による判定結果の取得可否に応じて副制御部の正常／異常を判定する。例えば、監視部は、副制御部から所定の間隔で送出される判定結果を所定の間隔で取得することができない場合、副制御部が異常であると判定する。監視部は、副制御部が異常であると判定した場合、信号灯器を閃光表示させるための閃光指示信号を出力する。 In the first invention, the sub-control unit determines normality / abnormality of the main control unit, and sends a determination result at a predetermined interval. The monitoring unit monitors the determination result sent from the sub-control unit, and determines normality / abnormality of the sub-control unit according to whether the sub-control unit can acquire the determination result. For example, the monitoring unit determines that the sub-control unit is abnormal when the determination result transmitted from the sub-control unit at a predetermined interval cannot be acquired at the predetermined interval. When the monitoring unit determines that the sub-control unit is abnormal, the monitoring unit outputs a flash instruction signal for flashing the signal lamp.
　当初、発明者らが検討した交通信号制御機では、副制御部（サブ回路）は、所定時間の都度に所定のパルス信号であるＷＤ信号を監視部（監視回路）に送出し、監視部は、上述のパルス信号を副制御部から当該所定時間以内に取得した場合、副制御部が正常であると判定し、当該所定時間内に取得できない場合、副制御部が異常であると判定する。当該ＷＤ信号に、副制御部が行った主制御部についての判定結果を組み込んで送出するようにすれば、副制御部が判定結果を送出して監視部で取得することができた場合には副制御部が正常であり、副制御部が判定結果を送出せず監視部で取得することができない場合には副制御部が異常であると判定することができる。 Initially, in the traffic signal controller considered by the inventors, the sub-control unit (sub-circuit) sends a WD signal, which is a predetermined pulse signal, to the monitoring unit (monitoring circuit) every time a predetermined time is passed. When the above-mentioned pulse signal is acquired from the sub-control unit within the predetermined time, it is determined that the sub-control unit is normal, and when it cannot be acquired within the predetermined time, it is determined that the sub-control unit is abnormal. If the WD signal incorporates the determination result of the main control unit performed by the sub-control unit and sends it, the sub-control unit can transmit the determination result and be acquired by the monitoring unit. When the sub-control unit is normal and the sub-control unit does not send out the determination result and cannot be acquired by the monitoring unit, it can be determined that the sub-control unit is abnormal.
　すなわち、主制御部の正常／異常の判定結果をＷＤ信号に組み込むことにより、ＣＰＵ正常／異常を伝達するための信号線（通信線）が不要となり、信号線の異常が発生する要因を除去することができるので、信号線の異常により主制御部が誤って異常であると判定される事態を防止することができる。また、副制御部に異常が発生した場合に前述の閃光表示に切り替わらないという事態も防止することができるので、副制御部から異常な灯色信号が灯色出力回路へ出力されるという事態も防止することができる。さらに、発明者らが当初検討した交通信号制御機では、ＷＤ信号用の信号線とＣＰＵの異常を伝達するための信号線の２つの信号線が必要であったのに対して、主制御部の正常／異常の判定結果をＷＤ信号に組み込むので、信号線（通信線）を削減することができる。 That is, by incorporating the normal / abnormal determination result of the main control unit into the WD signal, a signal line (communication line) for transmitting the normality / abnormality of the CPU becomes unnecessary, and the cause of the abnormality of the signal line is eliminated. Therefore, it is possible to prevent a situation in which the main control unit is erroneously determined to be abnormal due to an abnormality in the signal line. In addition, when the abnormality occurs in the sub-control unit, it is possible to prevent a situation in which the flash display is not switched to, so that an abnormal lamp color signal is output from the sub-control unit to the lamp color output circuit. Can be prevented. Further, in the traffic signal controller initially examined by the inventors, the signal line for the WD signal and the signal line for transmitting the abnormality of the CPU are required, whereas the main control unit Therefore, the signal line (communication line) can be reduced.
　第２発明にあっては、副制御部は、自身の正常／異常を判定し、異常であると判定した場合、判定結果の送出を停止する。自身の正常／異常は、例えば、現示データが正しいか否か等により判定することができる。 In the second invention, the sub-control unit determines its own normality / abnormality, and when it is determined to be abnormal, stops sending the determination result. The normality / abnormality of itself can be determined, for example, based on whether or not the displayed data is correct.
　発明者らが当初検討した交通信号制御機では、副制御部（サブ回路）と監視部（監視回路）との間に閃光指令を送出するための信号線が設けられ、副制御部は、当該信号線を用いて閃光指令を監視部へ送出する。そこで、副制御部が行う自身の判定結果をＷＤ信号に組み込み、正常判定＝正常出力時にはＷＤ信号を送出し、異常判定＝閃光出力時にはＷＤ信号を停止すれば副制御部が行う自身の判定結果を監視部に伝えることができる。 In the traffic signal controller initially examined by the inventors, a signal line for sending a flash command is provided between the sub-control unit (sub-circuit) and the monitoring unit (monitoring circuit). A flash command is sent to the monitoring unit using the signal line. Therefore, the determination result of the sub-control unit is incorporated into the WD signal, the WD signal is transmitted when normal determination = normal output, and the WD signal is stopped when the abnormality determination = flash output, and the determination result of the sub-control unit is performed. Can be communicated to the monitoring department.
　すなわち、「閃光指令を監視部へ送出する／送出しない」を、「主制御部の判定結果を含むＷＤ信号を所定時間の都度に監視部へ送出する／送出することを停止する」で表現したため、閃光指令の信号線を減らすことができる。これにより、信号線の異常が発生する要因を除去することができるので、前述の閃光表示に切り替わらないという事態を防止することができ、副制御部から異常な灯色信号が灯色出力回路へ出力されるという事態も防止することができる。さらに、発明者らが当初検討した交通信号制御機では、ＷＤ信号用の信号線と閃光指令を伝達するための信号線の２つの信号線が必要であったのに対して、副制御部が行う自身の判定結果をＷＤ信号に組み込むので、信号線（通信線）を削減することができる。 That is, “send flash command / not send to monitoring unit” is expressed as “send / stop sending WD signal including determination result of main control unit to monitoring unit every predetermined time”. , Flash command signal lines can be reduced. As a result, it is possible to eliminate the cause of the abnormality of the signal line, so that the situation where the flash display is not switched to can be prevented, and an abnormal lamp color signal is sent from the sub-control unit to the lamp color output circuit. It is also possible to prevent the situation of being output. Furthermore, in the traffic signal controller initially examined by the inventors, the signal line for the WD signal and the signal line for transmitting the flash command are necessary, whereas the sub-control unit has Since the result of own determination to be performed is incorporated into the WD signal, signal lines (communication lines) can be reduced.
　第３発明にあっては、監視部は、信号灯器を閃光表示させるか否かを示す指示信号を主制御部へ送出する。例えば、主制御部が「副制御部は異常である」と判定し、副制御部が「主制御部は正常である」と判定した場合には、監視部は閃光表示を行う旨の指示信号を送出するはずであるが、監視部が閃光表示を行う旨の指示信号を送出していないときは、主制御部は、監視部又は監視部周辺の信号線(通信線)等の異常が存在すると判定することができる。また、副制御部が異常でない場合に、監視部が誤って副制御部が異常であると判定し、監視部から閃光表示を行う旨の指示信号が送出されたときは、主制御部は、誤って閃光表示が行われることを判定することができる。 In the third invention, the monitoring unit sends an instruction signal indicating whether or not to flash the signal lamp to the main control unit. For example, when the main control unit determines that “the sub control unit is abnormal” and the sub control unit determines that “the main control unit is normal”, the monitoring unit displays an instruction signal for performing flash display. However, when the monitoring unit does not send an instruction signal for flashing, the main control unit has an abnormality such as a signal line (communication line) around the monitoring unit or the monitoring unit. Then it can be determined. Further, when the sub-control unit is not abnormal, the monitoring unit erroneously determines that the sub-control unit is abnormal, and when the instruction signal to flash display is sent from the monitoring unit, the main control unit, It can be determined that the flash display is erroneously performed.
　第４発明にあっては、監視部が送出した指示信号に応じた判定結果を外部へ通知する通知部を備える。通知部は、例えば、通信回線を使用して外部の上位装置へ閃光表示の有無に応じた異常を通知することができ、あるいは交通信号制御機に備えられた表示灯などを点灯又は点滅させて異常を通知することができる。これにより、誤って閃光表示が行われる場合、あるいは誤って閃光表示がされない場合などの異常を速やかに伝えることができる。 In the fourth aspect of the invention, a notification unit is provided for notifying the outside of a determination result corresponding to the instruction signal sent from the monitoring unit. The notification unit, for example, can notify the external host device of an abnormality according to the presence or absence of a flash display using a communication line, or can turn on or blink an indicator lamp provided in the traffic signal controller. Abnormalities can be notified. As a result, it is possible to promptly report an abnormality such as when the flash display is erroneously performed or when the flash display is not erroneously performed.
　本発明によれば、主制御部の正常／異常の判定結果をＷＤ信号に組み込むことにより、従来のＣＰＵ異常を伝達するための信号線（通信線）が不要となり、信号線の異常が発生する要因を除去することができるので、主制御部が誤って異常であると判定される事態を防止することができる。 According to the present invention, by incorporating the normal / abnormal determination result of the main control unit into the WD signal, a signal line (communication line) for transmitting a conventional CPU abnormality becomes unnecessary, and a signal line abnormality occurs. Since the factor can be removed, it is possible to prevent a situation where the main control unit is erroneously determined to be abnormal.
本実施の形態に係る交通信号制御機の構成の一例を示すブロック図である。It is a block diagram which shows an example of a structure of the traffic signal controller which concerns on this Embodiment. 本実施の形態の監視回路による判定結果と処理の一例を示す説明図である。It is explanatory drawing which shows an example of the determination result and the process by the monitoring circuit of this Embodiment. 本実施の形態のＣＰＵの処理手順の一例を示すフローチャートである。It is a flowchart which shows an example of the process sequence of CPU of this Embodiment. 本実施の形態のＣＰＵの処理手順の他の例を示すフローチャートである。It is a flowchart which shows the other example of the process sequence of CPU of this Embodiment. 本実施の形態のサブ回路の処理手順の一例を示すフローチャートである。It is a flowchart which shows an example of the process sequence of the subcircuit of this Embodiment. 本実施の形態のサブ回路の処理手順の他の例を示すフローチャートである。It is a flowchart which shows the other example of the process sequence of the subcircuit of this Embodiment. 本実施の形態の監視回路の処理手順の一例を示すフローチャートである。It is a flowchart which shows an example of the process sequence of the monitoring circuit of this Embodiment. 従来の交通信号制御機の構成例を示すブロック図である。It is a block diagram which shows the structural example of the conventional traffic signal controller. 安全性を高めた交通信号制御機の構成例を示すブロック図である。It is a block diagram which shows the structural example of the traffic signal controller which improved safety | security.
　以下、本発明に係る交通信号制御機の実施の形態を示す図面に基づいて説明する。図１は本実施の形態に係る交通信号制御機１００の構成の一例を示すブロック図である。交通信号制御機１００は、主制御部としてのＣＰＵ１０、副制御部としてのサブ回路１１、監視部としての監視回路１２、現示データ１３、切替回路１４、閃光回路１５、灯色出力回路１６、インタフェース部１７、通知部１８などを備える。サブ回路１１は、例えば、ＦＰＧＡ（Field Programmable Gate Array）などのハードウェア回路で構成される。 Hereinafter, description will be made based on the drawings showing an embodiment of a traffic signal controller according to the present invention. FIG. 1 is a block diagram showing an example of the configuration of the traffic signal controller 100 according to the present embodiment. The traffic signal controller 100 includes a CPU 10 as a main control unit, a sub circuit 11 as a sub control unit, a monitoring circuit 12 as a monitoring unit, display data 13, a switching circuit 14, a flash circuit 15, a lamp color output circuit 16, An interface unit 17 and a notification unit 18 are provided. The sub-circuit 11 is configured by a hardware circuit such as an FPGA (Field Programmable Gate Gate Array).
　ＣＰＵ１０は、所定時間Ｔ１（例えば、０．５秒、１秒など）の都度、ＣＰＵ１０が認識している灯色表示状態をサブ回路１１へ送出する。本実施の形態では、灯色表示状態の中に従来の歩進指令を含む。すなわち、ＣＰＵ１０は、所定時間Ｔ１の都度、現在の階梯を示す灯色表示状態をサブ回路１１へ送出し、信号灯器１の灯色を切り替えるタイミング（歩進のタイミング）のみ次の階梯を示す灯色表示状態を送出する。当該次の階梯を示す灯色表示状態が歩進指令に該当する。また、ＣＰＵ１０は、信号灯器１の灯色を切り替えるタイミング（歩進のタイミング）ではないとき、直近に送出したのと同じ階梯を示す灯色表示状態を再び送出する。 The CPU 10 sends the lamp color display state recognized by the CPU 10 to the sub circuit 11 every predetermined time T1 (for example, 0.5 seconds, 1 second, etc.). In the present embodiment, a conventional step command is included in the lamp color display state. That is, the CPU 10 sends a lamp color display state indicating the current level to the sub-circuit 11 every predetermined time T1, and indicates the next level only at the timing of switching the color of the signal lamp 1 (stepping timing). Sends the color display status. The lamp color display state indicating the next floor corresponds to the step command. Moreover, when it is not the timing (stepping timing) which switches the lamp color of the signal lamp device 1, CPU10 transmits again the lamp color display state which shows the same level as the last sent.
　信号灯器１の灯色を切り替えるために用いられる現示データ１３は、例えば、ステップ毎の各灯色の状態（点灯又は消灯）を示す灯色情報、灯色の順序、各ステップの基準表示秒数（基準表示時間）、最短表示秒数（最短表示時間）、最長表示秒数（最長表示時間）、階梯種別（例えば、長階梯、中階梯、短階梯などの区分を示す）、保安秒数、動作設定などの各情報を含む。 The display data 13 used for switching the lamp color of the signal lamp 1 includes, for example, lamp color information indicating the state of each lamp color (lit or extinguished) for each step, the order of the lamp colors, and the standard display seconds for each step. Number (reference display time), shortest display seconds (shortest display time), longest display seconds (longest display time), floor type (for example, indicate the category of long, middle, short, etc.), security seconds Each information such as operation settings is included.
　ＣＰＵ１０は、サブ回路１１の正常／異常を判定し、判定結果を監視回路１２へ出力する。なお、ＣＰＵ１０によるサブ回路１１の正常／異常の判定の詳細は後述する。 CPU 10 determines normality / abnormality of sub-circuit 11 and outputs the determination result to monitoring circuit 12. Details of the normal / abnormal determination of the sub-circuit 11 by the CPU 10 will be described later.
　サブ回路１１は、ＣＰＵ１０が送出した歩進指令に基づいて、信号灯器１の灯色を切り替えるための灯色信号を切替回路１４及びＣＰＵ１０へ出力する。 The sub-circuit 11 outputs a lamp color signal for switching the lamp color of the signal lamp device 1 to the switching circuit 14 and the CPU 10 based on the step command sent by the CPU 10.
　サブ回路１１は、所定時間Ｔ２（例えば、０．５秒、１秒など）の都度、サブ回路１１が認識している灯色表示状態をＣＰＵ１０へ送出する。 The sub circuit 11 sends the CPU 10 the lamp color display state recognized by the sub circuit 11 every predetermined time T2 (for example, 0.5 seconds, 1 second, etc.).
　サブ回路１１は、ＣＰＵ１０の正常／異常を判定し、所定時間Ｔ３（例えば、０．５秒、１秒など）の都度、判定結果をＣＰＵ１０へ送出する。なお、所定時間Ｔ１、所定時間Ｔ２、所定時間Ｔ３は、同じ値でもよく、異なる値にしてもよい。 The sub-circuit 11 determines normality / abnormality of the CPU 10 and sends a determination result to the CPU 10 every predetermined time T3 (for example, 0.5 seconds, 1 second, etc.). The predetermined time T1, the predetermined time T2, and the predetermined time T3 may be the same value or different values.
　サブ回路１１と監視回路１２との間には、１つの信号線（通信線）を配設してあり、サブ回路１１と監視回路１２との間の情報の送出／取得は、当該信号線を用いて行われる。 One signal line (communication line) is disposed between the sub circuit 11 and the monitoring circuit 12, and information transmission / acquisition between the sub circuit 11 and the monitoring circuit 12 is performed using the signal line. Done with.
　サブ回路１１は、ＣＰＵ１０の正常／異常を判定し、所定の間隔で判定結果を監視回路１２へ送出する。なお、サブ回路１１によるＣＰＵ１０の正常／異常の判定の詳細は後述する。 The sub-circuit 11 determines normality / abnormality of the CPU 10 and sends a determination result to the monitoring circuit 12 at a predetermined interval. Details of normal / abnormal determination of the CPU 10 by the sub-circuit 11 will be described later.
　また、サブ回路１１は、自身の正常／異常を判定し、正常であると判定した場合には、「サブ回路１１は正常」の判定結果を所定の間隔（例えば、１ｍｓ、１０ｍｓ、１００ｍｓ等）で監視回路１２へ送出し、異常であると判定した場合、判定結果の送出を停止する。自身の正常／異常は、例えば、現示データ１３が正しいか否か等により判定することができる。 Further, the sub-circuit 11 determines its own normal / abnormality, and if it is determined to be normal, the determination result of “sub-circuit 11 is normal” is sent at a predetermined interval (for example, 1 ms, 10 ms, 100 ms, etc.) And when it is determined that there is an abnormality, the transmission of the determination result is stopped. The normality / abnormality of itself can be determined by, for example, whether or not the display data 13 is correct.
　サブ回路１１は、自身の判定結果である「サブ回路１１は正常」を監視回路１２へ送出する際に、「ＣＰＵ１０の正常／異常」の判定結果を組み込んで監視回路１２へ送出する。 The sub-circuit 11 incorporates the determination result “normal / abnormal” of the CPU 10 and sends it to the monitoring circuit 12 when sending “sub-circuit 11 normal”, which is its own determination result, to the monitoring circuit 12.
　サブ回路１１が監視回路１２へ送出する判定結果については、次のような送出方法がある。例えば、サブ回路１１が監視回路１２へ所定の間隔で送出する判定結果は、サブ回路１２が「ＣＰＵは正常」と判定した場合と、「ＣＰＵは異常」と判定した場合とで、異なるパターン又は波形の信号とする。送出する信号を二値化信号（ハイレベルとローレベルの繰り返しパルス）とした場合、ＣＰＵが正常である場合には、ハイレベルの時間をローレベルの時間より長くし、ＣＰＵが異常である場合には、ハイレベルの時間をローレベルの時間より短くすることができる。 There are the following transmission methods for the determination result transmitted from the sub-circuit 11 to the monitoring circuit 12. For example, the determination result that the sub-circuit 11 sends to the monitoring circuit 12 at a predetermined interval is different depending on whether the sub-circuit 12 determines “CPU is normal” or “CPU is abnormal”. Let it be a waveform signal. When the signal to be sent is a binarized signal (repetitive pulse of high level and low level), if the CPU is normal, the high level time is made longer than the low level time and the CPU is abnormal The high level time can be made shorter than the low level time.
　また、別の例としては、サブ回路１１が監視回路１２へ送出する判定結果は、定期的な通信データであり、当該通信データの内容の１つにサブ回路１１による「ＣＰＵの正常／異常判定」情報を組み込むこともできる。 As another example, the determination result sent from the sub-circuit 11 to the monitoring circuit 12 is periodic communication data, and one of the contents of the communication data includes “CPU normal / abnormal determination”. Information can also be incorporated.
　監視回路１２は、ＣＰＵ１０から「サブ回路１１の正常／異常」の判定結果を取得する。 The monitoring circuit 12 acquires a determination result of “normal / abnormal of the sub circuit 11” from the CPU 10.
　また、監視回路１２は、サブ回路１１から「サブ回路１１は正常」の判定結果を所定の間隔で取得できたか否かに応じて、サブ回路１１の正常／異常を判定する。例えば、監視回路１２は、サブ回路１１から「サブ回路１１は正常」の自身の判定結果を所定の間隔で取得できない場合、サブ回路１１は異常であると判定する。 Further, the monitoring circuit 12 determines normality / abnormality of the subcircuit 11 according to whether or not the determination result of “subcircuit 11 is normal” has been acquired from the subcircuit 11 at a predetermined interval. For example, the monitoring circuit 12 determines that the sub circuit 11 is abnormal when the sub circuit 11 cannot obtain its own determination result of “sub circuit 11 is normal” at a predetermined interval.
　また、監視回路１２は、サブ回路１１から「サブ回路１１は正常」の自身の判定結果を所定の間隔で取得した場合、サブ回路１１は正常であると判定する。 The monitoring circuit 12 determines that the sub circuit 11 is normal when the sub circuit 11 acquires its own determination result of “sub circuit 11 is normal” at a predetermined interval.
また、監視回路１２は、サブ回路１１から「サブ回路１１は正常」の自身の判定結果を所定の間隔で取得した場合、同じタイミングでサブ回路１１から送出された「ＣＰＵ１０の正常／異常」の判定結果を取得する。すなわち、監視回路１２は、サブ回路１１から「サブ回路１１は正常」の自身の判定結果を所定の間隔で取得できない場合、「ＣＰＵ１０の正常／異常」の判定結果も所定の間隔で取得することができない。 Further, when the monitoring circuit 12 obtains its own determination result “sub circuit 11 is normal” from the sub circuit 11 at a predetermined interval, the “normal / abnormal CPU 10” sent from the sub circuit 11 at the same timing. Get the judgment result. That is, when the monitoring circuit 12 cannot acquire its own determination result “sub-circuit 11 is normal” from the sub-circuit 11 at a predetermined interval, it also acquires the determination result “normal / abnormal” of the CPU 10 at a predetermined interval. I can't.
　そして、監視回路１２は、サブ回路１１から「ＣＰＵ１０の正常／異常」の判定結果を所定の間隔で取得できたか否かに応じて、サブ回路１１の正常／異常を判定する。例えば、監視回路１２は、サブ回路１１から「ＣＰＵ１０の正常／異常」の判定結果を所定の間隔で取得できない場合、サブ回路１１が異常であると判定する。 Then, the monitoring circuit 12 determines the normality / abnormality of the subcircuit 11 according to whether or not the determination result of “normal / abnormality of the CPU 10” can be acquired from the subcircuit 11 at a predetermined interval. For example, the monitoring circuit 12 determines that the sub circuit 11 is abnormal when the determination result “normal / abnormal” of the CPU 10 cannot be obtained from the sub circuit 11 at a predetermined interval.
　監視回路１２は、取得した判定結果に基づいて、ＣＰＵ１０の正常／異常、サブ回路１１の正常／異常を判定し、判定結果に応じて切替信号を切替回路１４及びＣＰＵ１０へ送出する。切替信号は、切替回路１４が、サブ回路１１が出力する灯色信号を灯色出力回路１６へ出力するのか、閃光回路１５が出力する閃光信号を灯色出力回路１６へ出力するのかを決定するための信号であり、監視回路１２が閃光表示を行う旨の指示信号を含むものである。監視回路１２による判定方法と処理については後述する。 The monitoring circuit 12 determines normality / abnormality of the CPU 10 and normality / abnormality of the sub-circuit 11 based on the acquired determination result, and sends a switching signal to the switching circuit 14 and the CPU 10 according to the determination result. The switching signal determines whether the switching circuit 14 outputs the lamp color signal output from the sub-circuit 11 to the lamp color output circuit 16 or the flash signal output from the flash circuit 15 to the lamp color output circuit 16. This signal includes an instruction signal indicating that the monitoring circuit 12 performs flash display. The determination method and processing by the monitoring circuit 12 will be described later.
　閃光回路１５は、各信号灯器１を閃光表示させるための閃光信号を切替回路１４へ送出する。閃光表示は、例えば、主道路と従道路とが交差している場合、主道路に対する信号灯器１を黄点滅させ、従道路に対する信号灯器１を赤点滅させる状態をいう。また、主道路に対する信号灯器１を赤点滅させ、従道路に対する信号灯器１を赤点滅させる状態をいう。なお、閃光表示は、黄点滅赤点滅、赤点滅赤点滅に限定されるものではない。 The flash circuit 15 sends a flash signal for flashing each signal lamp 1 to the switching circuit 14. The flashing display means a state in which, for example, when the main road and the secondary road intersect, the signal lamp 1 for the main road blinks in yellow, and the signal lamp 1 for the secondary road blinks in red. Further, it means a state in which the signal lamp 1 for the main road blinks red and the signal lamp 1 for the secondary road blinks red. The flashing display is not limited to yellow flashing red flashing and red flashing red flashing.
　切替回路１４は、監視回路１２が送出した切替信号に基づいて、サブ回路１１が出力する灯色信号に切り替えるか、あるいは閃光回路１５が出力する閃光信号に切り替える。切替回路１４は、灯色信号又は閃光信号のいずれかを灯色出力回路１６へ出力する。 The switching circuit 14 switches to the lamp color signal output from the sub-circuit 11 or switches to the flash signal output from the flash circuit 15 based on the switching signal sent out by the monitoring circuit 12. The switching circuit 14 outputs either the lamp color signal or the flash signal to the lamp color output circuit 16.
　灯色出力回路１６は、切替回路１４から出力された灯色信号又は閃光信号に基づいて、各信号灯器１を駆動する。具体的には、灯色出力回路１６は、灯色信号又は閃光信号をＡＣ１００Ｖ又は所要の電圧に変換し、信号灯器１のランプ又はＬＥＤ（発光ダイオード）を点灯させる。 The lamp color output circuit 16 drives each signal lamp 1 based on the lamp color signal or flash signal output from the switching circuit 14. Specifically, the lamp color output circuit 16 converts the lamp color signal or the flash signal into AC 100 V or a required voltage, and turns on the lamp or LED (light emitting diode) of the signal lamp unit 1.
　次に、ＣＰＵ１０によるサブ回路１１の正常／異常の判定方法について説明する。ＣＰＵ１０は、サブ回路１１が送出する灯色表示状態を所定時間Ｔ２経過しても取得することができない場合、サブ回路１１が異常であると判定する。 Next, the normal / abnormal determination method of the sub circuit 11 by the CPU 10 will be described. The CPU 10 determines that the sub circuit 11 is abnormal when the lamp color display state sent out by the sub circuit 11 cannot be acquired even after the predetermined time T2.
　また、ＣＰＵ１０は、自身が保持する灯色表示状態とサブ回路１１が送出した灯色表示状態とが一致しない場合、サブ回路１１が異常であると判定する。これにより、サブ回路１１が動作している場合であっても、従来では検出することができない、意図しない灯色出力を防止することができる。 Further, the CPU 10 determines that the sub circuit 11 is abnormal when the lamp color display state held by the CPU 10 and the lamp color display state sent by the sub circuit 11 do not match. Thereby, even if the sub circuit 11 is operating, it is possible to prevent an unintended lamp color output that cannot be detected in the prior art.
　また、ＣＰＵ１０は、サブ回路１１が出力した灯色信号の灯色の組み合わせが禁止された状態である場合、サブ回路１１が異常であると判定する。灯色の禁止された組み合わせとは、例えば、交差する道路それぞれに対する信号灯器の灯色が同時に青になっている青青状態などをいう。これにより、サブ回路１１が動作している場合であっても、従来では検出することができない、意図しない灯色出力を防止することができる。 Further, the CPU 10 determines that the sub circuit 11 is abnormal when the combination of the lamp colors of the lamp color signals output from the sub circuit 11 is prohibited. The combination in which the lamp colors are prohibited refers to, for example, a blue-blue state in which the lamp colors of the signal lamps for the intersecting roads are simultaneously blue. Thereby, even if the sub circuit 11 is operating, it is possible to prevent an unintended lamp color output that cannot be detected in the prior art.
　また、ＣＰＵ１０は、サブ回路１１が切替回路１４へ出力した灯色信号を取得し、自身が保持する灯色表示状態とサブ回路１１が切替回路１４へ出力した灯色信号による灯色表示状態とが一致しない場合、サブ回路１１が異常であると判定する。これにより、サブ回路１１が動作している場合であっても、従来では検出することができない、意図しない灯色出力を防止することができる。 Further, the CPU 10 acquires the lamp color signal output from the sub circuit 11 to the switching circuit 14, the lamp color display state held by itself, and the lamp color display state based on the lamp color signal output from the sub circuit 11 to the switching circuit 14. If they do not match, it is determined that the sub-circuit 11 is abnormal. Thereby, even if the sub circuit 11 is operating, it is possible to prevent an unintended lamp color output that cannot be detected in the prior art.
　また、ＣＰＵ１０は、サブ回路１１が、所定時間Ｔ３（例えば、０．５秒、１秒など）を経過しても、サブ回路１１から「ＣＰＵ１０の正常／異常」の判定結果を取得できない場合、サブ回路１１が異常であると判定する。これにより、従来では、検出することができなかったサブ回路１１の異常又は信号線などの異常を検出することができる。 Further, when the sub circuit 11 cannot acquire the determination result of “normal / abnormal CPU 10” from the sub circuit 11 even after the predetermined time T3 (for example, 0.5 second, 1 second, etc.) has elapsed, It is determined that the sub circuit 11 is abnormal. Thereby, it is possible to detect an abnormality of the sub-circuit 11 or an abnormality such as a signal line that could not be detected conventionally.
　次に、サブ回路１１によるＣＰＵ１０の正常／異常の判定方法について説明する。サブ回路１１は、ＣＰＵ１０が送出する灯色表示状態を所定時間Ｔ１（例えば、０．５秒、１秒など）内に取得できない場合、ＣＰＵ１０が異常であると判定する。所定時間Ｔ１内でＣＰＵ１０の正常／異常を判定することができるので、従来のように最長保証秒数（例えば、１１０秒）が経過するまでＣＰＵ１０の異常を検出することができず、異常な状態が長時間継続するという事態を回避することができ、最長保証時間経過まで待つことなく異常を検出することができる。また、階梯保持指令後であっても、ＣＰＵ１０の異常を検出することができるので、階梯歩進ができなくなるという事態も回避することができる。 Next, the normal / abnormal determination method of the CPU 10 by the sub circuit 11 will be described. The sub circuit 11 determines that the CPU 10 is abnormal when the lamp color display state sent out by the CPU 10 cannot be acquired within a predetermined time T1 (for example, 0.5 seconds, 1 second, etc.). Since normality / abnormality of the CPU 10 can be determined within the predetermined time T1, the abnormal state of the CPU 10 cannot be detected until the maximum guaranteed number of seconds (for example, 110 seconds) elapses as in the prior art. Can be avoided for a long time, and an abnormality can be detected without waiting for the longest guarantee time to elapse. In addition, since the abnormality of the CPU 10 can be detected even after the floor retention command, it is possible to avoid a situation in which the floor step cannot be performed.
　また、サブ回路１１は、所定の指定範囲（例えば、０．５～１秒）内でＣＰＵ１０からの歩進指令を取得することができない場合、ＣＰＵ１０が異常であると判定する。例えば、サブ回路１１は、ＣＰＵ１０が出力する歩進指令の間隔が所定の指定範囲より短い場合、あるいは長い場合、ＣＰＵ１０が異常であると判定する。これにより、ＣＰＵ１０の異常を従来よりも短時間で検出することができる。 Further, the sub circuit 11 determines that the CPU 10 is abnormal when it cannot acquire the step command from the CPU 10 within a predetermined designated range (for example, 0.5 to 1 second). For example, the sub-circuit 11 determines that the CPU 10 is abnormal when the interval of the step command output by the CPU 10 is shorter or longer than a predetermined designated range. Thereby, abnormality of CPU10 can be detected in a shorter time than before.
　次に、監視回路１２による判定結果と処理について説明する。図２は本実施の形態の監視回路１２による判定結果と処理の一例を示す説明図である。図２に示すように、監視回路１２が取得して監視する判定結果は、サブ回路１１の判定結果（サブ回路１１自身の正常／異常、及びＣＰＵ１０の正常／異常）と、ＣＰＵ１０の判定結果（サブ回路１１の正常／異常）であり、これらの判定結果の組み合わせに応じて、監視回路１２の処理が異なる。 Next, the determination result and processing by the monitoring circuit 12 will be described. FIG. 2 is an explanatory diagram illustrating an example of determination results and processing by the monitoring circuit 12 according to the present embodiment. As shown in FIG. 2, the determination result acquired and monitored by the monitoring circuit 12 includes the determination result of the sub circuit 11 (normal / abnormality of the sub circuit 11 itself and normal / abnormality of the CPU 10) and the determination result of the CPU 10 ( The sub-circuit 11 is normal / abnormal), and the processing of the monitoring circuit 12 differs depending on the combination of these determination results.
　例えば、サブ回路１１が「サブ回路１１は正常」及び「ＣＰＵ１０は正常」と判定し、ＣＰＵ１０が「サブ回路１１は正常」と判定した場合、監視回路１２は、サブ回路１１及びＣＰＵ１０共に正常であると判定し、特段の処理を行わない。この場合、ＣＰＵ１０の歩進指令に基づく歩進が行われる。 For example, when the sub circuit 11 determines that “the sub circuit 11 is normal” and “the CPU 10 is normal” and the CPU 10 determines that “the sub circuit 11 is normal”, the monitoring circuit 12 is normal for both the sub circuit 11 and the CPU 10. It is determined that there is, and no special processing is performed. In this case, a step based on a step command from the CPU 10 is performed.
　また、サブ回路１１が「サブ回路１１は正常」及び「ＣＰＵ１０は正常」と判定し、ＣＰＵ１０が「サブ回路１１は異常」と判定した場合、監視回路１２は、サブ回路１１が異常であり、ＣＰＵ１０が正常であると判定し、閃光回路１５からの閃光信号に切り替えるべく切替信号を切替回路１４へ送出して閃光表示指示を行う。この場合、閃光表示が行われる。 When the sub circuit 11 determines that “the sub circuit 11 is normal” and “the CPU 10 is normal”, and the CPU 10 determines that “the sub circuit 11 is abnormal”, the monitoring circuit 12 indicates that the sub circuit 11 is abnormal. The CPU 10 determines that it is normal, and sends a switching signal to the switching circuit 14 to switch to the flash signal from the flash circuit 15 to give a flash display instruction. In this case, flash display is performed.
　また、サブ回路１１が「サブ回路１１は正常」及び「ＣＰＵ１０は異常」と判定し、ＣＰＵ１０が「サブ回路１１は正常」と判定した場合、監視回路１２は、サブ回路１１が正常であり、ＣＰＵ１０が異常であると判定し、特段の処理を行わない。この場合、サブ回路１１の自己判断に基づく歩進が行われる。これにより、ＣＰＵ１０の異常が検出された場合でも、継続して信号灯器１の灯色の切り替えを行うことができる。 When the sub circuit 11 determines that “the sub circuit 11 is normal” and “the CPU 10 is abnormal”, and the CPU 10 determines that “the sub circuit 11 is normal”, the monitoring circuit 12 indicates that the sub circuit 11 is normal, It is determined that the CPU 10 is abnormal, and no special processing is performed. In this case, stepping based on self-determination of the sub-circuit 11 is performed. Thereby, even if abnormality of CPU10 is detected, the lamp color of the signal lamp device 1 can be switched continuously.
　また、サブ回路１１が「サブ回路１１は正常」及び「ＣＰＵ１０は異常」と判定し、ＣＰＵ１０が「サブ回路１１は異常」と判定した場合、監視回路１２は、サブ回路１１が正常であり、ＣＰＵ１０が異常であると判定し、特段の処理を行わない。この場合、サブ回路１１の自己判断に基づく歩進が行われる。これにより、ＣＰＵ１０の異常が検出された場合でも、継続して信号灯器１の灯色の切り替えを行うことができる。 When the sub circuit 11 determines that “the sub circuit 11 is normal” and “the CPU 10 is abnormal”, and the CPU 10 determines that “the sub circuit 11 is abnormal”, the monitoring circuit 12 indicates that the sub circuit 11 is normal, It is determined that the CPU 10 is abnormal, and no special processing is performed. In this case, stepping based on self-determination of the sub-circuit 11 is performed. Thereby, even if abnormality of CPU10 is detected, the lamp color of the signal lamp device 1 can be switched continuously.
　また、サブ回路１１が「サブ回路１１は異常」と判定した場合、監視回路１２は、サブ回路１１が異常であると判定し、閃光回路１５からの閃光信号に切り替えるべく切替信号を切替回路１４へ送出して閃光表示指示を行う。この場合、閃光表示が行われる。 When the sub-circuit 11 determines that “the sub-circuit 11 is abnormal”, the monitoring circuit 12 determines that the sub-circuit 11 is abnormal and switches the switching signal to the flash circuit 15 from the flash circuit 15. To display flash. In this case, flash display is performed.
　上述のように、サブ回路１１は、ＣＰＵ１０の正常／異常を判定し、所定の間隔で判定結果を監視回路１２へ送出する。監視回路１２は、サブ回路１１が送出した判定結果を監視し、サブ回路１１による判定結果の取得可否に応じてサブ回路１１の正常／異常を判定する。例えば、監視回路１２は、サブ回路１１から所定の間隔で送出される判定結果を所定の間隔で取得することができない場合、サブ回路１１が異常であると判定する。監視回路１２は、サブ回路１１が異常であると判定した場合、信号灯器１を閃光表示させるための閃光指示信号（切替信号）を出力する。 As described above, the sub-circuit 11 determines normality / abnormality of the CPU 10 and sends a determination result to the monitoring circuit 12 at a predetermined interval. The monitoring circuit 12 monitors the determination result sent from the sub circuit 11 and determines normality / abnormality of the sub circuit 11 according to whether or not the determination result by the sub circuit 11 can be acquired. For example, the monitoring circuit 12 determines that the sub circuit 11 is abnormal when the determination result transmitted from the sub circuit 11 at a predetermined interval cannot be obtained at the predetermined interval. When the monitoring circuit 12 determines that the sub-circuit 11 is abnormal, the monitoring circuit 12 outputs a flash instruction signal (switching signal) for causing the signal lamp device 1 to flash display.
　図９で示す発明者らが当初検討した交通信号制御機３００では、サブ回路３０２は、所定時間の都度に所定のパルス信号であるＷＤ信号を監視回路３０４へ送出し、監視回路３０４は、上述のパルス信号をサブ回路３０２から当該所定時間以内に取得した場合、サブ回路３０２が正常であると判定し、当該所定時間内に取得できない場合、サブ回路３０２が異常であると判定する。そこで、本実施の形態では、当該ＷＤ信号に、サブ回路１１が行ったＣＰＵ１０についての判定結果を組み込んで送出するようにすれば、サブ回路１１が判定結果を送出して監視回路１２で取得することができた場合にはサブ回路１１が正常であり、サブ回路１１が判定結果を送出せず監視回路１２で取得することができない場合にはサブ回路１１が異常であると判定することができる。 In the traffic signal controller 300 initially examined by the inventors shown in FIG. 9, the sub-circuit 302 sends a WD signal, which is a predetermined pulse signal, to the monitoring circuit 304 every predetermined time. Is acquired from the sub circuit 302 within the predetermined time, it is determined that the sub circuit 302 is normal, and when it cannot be acquired within the predetermined time, the sub circuit 302 is determined to be abnormal. Therefore, in the present embodiment, if the determination result for the CPU 10 performed by the sub circuit 11 is incorporated in the WD signal and transmitted, the sub circuit 11 transmits the determination result and is acquired by the monitoring circuit 12. If the sub-circuit 11 is normal and the sub-circuit 11 does not send out the determination result and cannot be acquired by the monitoring circuit 12, it can be determined that the sub-circuit 11 is abnormal. .
　すなわち、本実施の形態では、ＣＰＵ１０の正常／異常の判定結果をＷＤ信号に組み込むことにより、ＣＰＵ正常／異常を伝達するための信号線（通信線）（例えば、図９に例示した交通信号制御機３００におけるサブ回路３０２と監視回路３０４との間の判定結果用の信号線）が不要となり、信号線の異常が発生する要因を除去することができるので、信号線の異常によりＣＰＵ１０が誤って異常であると判定される事態を防止することができる。また、本実施の形態では、サブ回路１１に異常が発生した場合に前述の閃光表示に切り替わらないという事態も防止することができるので、サブ回路１１から異常な灯色信号が灯色出力回路へ出力されるという事態も防止することができる。さらに、発明者らが当初検討した交通信号制御機３００では、ＷＤ信号用の信号線とＣＰＵの異常を伝達するための信号線の２つの信号線が必要であったのに対して、本実施の形態では、ＣＰＵ１０の正常／異常の判定結果をＷＤ信号に組み込むので、信号線（通信線）を削減することができる。 In other words, in the present embodiment, the normal / abnormal determination result of the CPU 10 is incorporated into the WD signal, whereby a signal line (communication line) for transmitting the normal / abnormal CPU (for example, traffic signal control illustrated in FIG. 9). The determination result signal line between the sub circuit 302 and the monitoring circuit 304 in the machine 300 is not necessary, and the cause of the signal line abnormality can be eliminated. It is possible to prevent a situation that is determined to be abnormal. Further, in the present embodiment, it is possible to prevent a situation in which the flash circuit is not switched to the above-described flash display when an abnormality occurs in the sub circuit 11, so that an abnormal lamp color signal is output from the sub circuit 11 to the lamp color output circuit. It is also possible to prevent the situation of being output. Furthermore, in the traffic signal controller 300 initially examined by the inventors, the signal line for the WD signal and the signal line for transmitting the abnormality of the CPU are required. In this embodiment, since the normal / abnormal determination result of the CPU 10 is incorporated into the WD signal, signal lines (communication lines) can be reduced.
　また、本実施の形態では、サブ回路１１は、自身の正常／異常を判定し、異常であると判定した場合、判定結果の送出を停止する。サブ回路１１自身の正常／異常は、例えば、現示データ１３が正しいか否か等により判定することができる。 In the present embodiment, the sub-circuit 11 determines its own normality / abnormality, and when it is determined to be abnormal, it stops sending the determination result. The normality / abnormality of the sub-circuit 11 itself can be determined by, for example, whether the display data 13 is correct.
　図９で示す発明者らが当初検討した交通信号制御機３００では、サブ回路３０２と監視回路３０４との間に閃光指令を送出するための信号線が設けられ、サブ回路３０２は、当該信号線を用いて閃光指令を監視回路３０４へ送出する。そこで、サブ回路１１が行う自身の判定結果をＷＤ信号に組み込み、正常判定＝正常出力時にはＷＤ信号を送出し、異常判定＝閃光出力時にはＷＤ信号を停止すれば、サブ回路１１が行う自身の判定結果を監視回路１２へ伝えることができる。 In the traffic signal controller 300 initially examined by the inventors shown in FIG. 9, a signal line for sending a flash command is provided between the sub circuit 302 and the monitoring circuit 304, and the sub circuit 302 includes the signal line. Is used to send a flash command to the monitoring circuit 304. Therefore, if the determination result of the sub-circuit 11 is incorporated into the WD signal, the WD signal is transmitted when normal determination = normal output, and the WD signal is stopped when the abnormal determination = flash output, the sub-circuit 11 performs its determination. The result can be transmitted to the monitoring circuit 12.
　すなわち、本実施の形態では、「閃光指令を監視回路１２へ送出する／送出しない」を、「ＣＰＵ１０の判定結果を含むＷＤ信号を所定時間の都度に監視回路１２へ送出する／送出することを停止する」で表現したため、閃光指令の信号線（例えば、図９に例示した交通信号制御機３００におけるサブ回路３０２と監視回路３０４との間の閃光指令用の信号線）を減らすことができる。これにより、信号線の異常が発生する要因を除去することができるので、前述の閃光表示に切り替わらないという事態を防止することができ、サブ回路１１から異常な灯色信号が灯色出力回路へ出力されるという事態も防止することができる。さらに、発明者らが当初検討した交通信号制御機３００では、ＷＤ信号用の信号線と閃光指令を伝達するための信号線の２つの信号線が必要であったのに対して、本実施の形態では、サブ回路１１が行う自身の判定結果をＷＤ信号に組み込むので、さらに信号線（通信線）を削減することができる。 That is, in the present embodiment, “send flash command / not send to monitoring circuit 12” means “send / send WD signal including determination result of CPU 10 to monitoring circuit 12 every predetermined time”. Since it is expressed as “stop”, the flash command signal line (for example, the flash command signal line between the sub circuit 302 and the monitoring circuit 304 in the traffic signal controller 300 illustrated in FIG. 9) can be reduced. As a result, the cause of the abnormality of the signal line can be removed, so that the situation where the flash display is not switched to can be prevented, and an abnormal lamp color signal is sent from the sub circuit 11 to the lamp color output circuit. It is also possible to prevent the situation of being output. Furthermore, the traffic signal controller 300 initially examined by the inventors required two signal lines, a signal line for transmitting a WD signal and a signal line for transmitting a flash command. In the embodiment, since the determination result of the sub circuit 11 is incorporated into the WD signal, signal lines (communication lines) can be further reduced.
　本実施の形態では、監視回路１２は、信号灯器１を閃光表示させるか否かを示す指示信号（切替信号）をＣＰＵ１０へ送出する。例えば、ＣＰＵ１０が「サブ回路１１は異常である」と判定し、サブ回路１１が「ＣＰＵ１０は正常である」と判定した場合には、監視回路１２は閃光表示を行う旨の指示信号（切替信号）を送出するはずであるが、監視回路１２が閃光表示を行う旨の指示信号（切替信号）を送出していないときは、ＣＰＵ１０は、監視回路１２又は監視回路１２周辺の信号線(通信線)等の異常が存在すると判定することができる。また、サブ回路１１が異常でない場合に、誤ってサブ回路１１が異常であると判定され、監視回路１２から閃光表示を行う旨の指示信号（切替信号）が送出されたときは、ＣＰＵ１０は、誤って閃光表示が行われることを判定することができる。 In the present embodiment, the monitoring circuit 12 sends to the CPU 10 an instruction signal (switching signal) indicating whether or not the signal lamp device 1 is flash-displayed. For example, when the CPU 10 determines that “the sub-circuit 11 is abnormal” and the sub-circuit 11 determines that “the CPU 10 is normal”, the monitoring circuit 12 displays an instruction signal (switching signal) for performing flash display. ), But when the monitoring circuit 12 does not transmit an instruction signal (switching signal) for performing flash display, the CPU 10 or the signal line (communication line) around the monitoring circuit 12 ) And the like can be determined to exist. When the sub circuit 11 is not abnormal, it is erroneously determined that the sub circuit 11 is abnormal, and when the instruction signal (switching signal) for performing flash display is sent from the monitoring circuit 12, the CPU 10 It can be determined that the flash display is erroneously performed.
　そして、通知部１８は、ＣＰＵ１０の制御の下、監視回路１２が送出した指示信号（切替信号）に応じた判定結果を外部へ通知する。通知部１８は、例えば、インタフェース部１７を介して通信回線を使用して外部の上位装置３００へ閃光表示の有無に応じた異常を通知することができ、あるいは交通信号制御機１００に備えられた表示灯などを点灯又は点滅させて異常を通知することができる。これにより、誤って閃光表示が行われる場合、あるいは誤って閃光表示がされない場合などの異常を速やかに伝えることができる。 And the notification part 18 notifies the determination result according to the instruction | indication signal (switching signal) which the monitoring circuit 12 sent out outside under control of CPU10. The notification unit 18 can notify, for example, an abnormality according to the presence / absence of a flashing display to the external host device 300 using a communication line via the interface unit 17, or is provided in the traffic signal controller 100. An abnormality can be notified by turning on or blinking an indicator lamp or the like. As a result, it is possible to promptly report an abnormality such as when the flash display is erroneously performed or when the flash display is not erroneously performed.
　次に、本実施の形態の交通信号制御機１００の動作について説明する。図３は本実施の形態のＣＰＵ１０の処理手順の一例を示すフローチャートである。ＣＰＵ１０は、サブ回路１１の正常／異常の判定処理を行う（Ｓ１１）。ＣＰＵ１０は、サブ回路１１が異常であるか否かを判定し（Ｓ１２）、「サブ回路１１は異常」と判定した場合（Ｓ１２でＹＥＳ）、「サブ回路１１は異常」の判定結果を所定の間隔で監視回路１２へ送出する（Ｓ１３）。 Next, the operation of the traffic signal controller 100 of the present embodiment will be described. FIG. 3 is a flowchart illustrating an example of a processing procedure of the CPU 10 according to the present embodiment. The CPU 10 performs normal / abnormal determination processing of the sub-circuit 11 (S11). The CPU 10 determines whether or not the sub circuit 11 is abnormal (S12), and determines that “the sub circuit 11 is abnormal” (YES in S12), the determination result “sub circuit 11 is abnormal” The data is sent to the monitoring circuit 12 at intervals (S13).
　ＣＰＵ１０は、サブ回路１１から「ＣＰＵ１０は正常」の判定結果を取得したか否かを判定し（Ｓ１４）、「ＣＰＵ１０は正常」の判定結果を取得した場合（Ｓ１４でＹＥＳ）、監視回路１２が送出する切替信号を取得する（Ｓ１５）。ＣＰＵ１０がサブ回路１１から「ＣＰＵ１０は正常」の判定結果を取得した場合には、ＣＰＵ１０が「サブ回路１１は異常」と判定し、サブ回路１１が「ＣＰＵ１０は正常」と判定しているので、監視回路１２は、閃光表示を行うべく切替信号を出力しているはずである。 The CPU 10 determines whether or not the determination result “CPU 10 is normal” has been acquired from the sub-circuit 11 (S14). If the determination result “CPU 10 is normal” is acquired (YES in S14), the monitoring circuit 12 A switching signal to be sent is acquired (S15). When the CPU 10 acquires the determination result “CPU 10 is normal” from the sub circuit 11, the CPU 10 determines that “the sub circuit 11 is abnormal” and the sub circuit 11 determines that “the CPU 10 is normal”. The monitoring circuit 12 should have output a switching signal to perform flash display.
　ＣＰＵ１０は、取得した切替信号が閃光表示へ切り替えるための切替信号であるか否かを判定し（Ｓ１６）、閃光表示へ切り替えるための切替信号でない場合（Ｓ１６でＮＯ）、監視回路１２等の異常を表示灯に表示させて通知し、あるいは上位装置３００へ通知し（Ｓ１７）、処理を終了する。 The CPU 10 determines whether or not the acquired switching signal is a switching signal for switching to flash display (S16). If the switching signal is not a switching signal for switching to flash display (NO in S16), the monitoring circuit 12 or the like is abnormal. Is displayed on the indicator lamp, or is notified to the host device 300 (S17), and the process is terminated.
　閃光表示へ切り替えるための切替信号である場合（Ｓ１６でＹＥＳ）、ＣＰＵ１０は、監視回路１２等は正常であると判定して、ステップＳ１７の処理を行わずに処理を終了する。 If it is a switching signal for switching to flash display (YES in S16), the CPU 10 determines that the monitoring circuit 12 and the like are normal, and ends the process without performing the process of step S17.
　サブ回路１１は異常でないと判定した場合（Ｓ１２でＮＯ）、ＣＰＵ１０は、「サブ回路１１は正常」の判定結果を所定の間隔で監視回路１２へ送出する（Ｓ１８）。ＣＰＵ１０は、サブ回路１１から「ＣＰＵは正常」の判定結果を取得したか否かを判定し（Ｓ１９）、「ＣＰＵは正常」の判定結果を取得した場合（Ｓ１９でＹＥＳ）、処理を終了する。 If it is determined that the sub circuit 11 is not abnormal (NO in S12), the CPU 10 sends a determination result of “sub circuit 11 is normal” to the monitoring circuit 12 at a predetermined interval (S18). The CPU 10 determines whether or not the determination result of “CPU is normal” is acquired from the sub-circuit 11 (S19), and when the determination result of “CPU is normal” is acquired (YES in S19), the process is terminated. .
　「ＣＰＵは正常」の判定結果を取得しなかった場合（Ｓ１９でＮＯ）、ＣＰＵ１０は、サブ回路１１による出力であることを通知し（Ｓ２０）、処理を終了する。また、サブ回路１１から「ＣＰＵ１０は正常」との判定結果を取得できない場合（Ｓ１４でＮＯ）、ＣＰＵ１０は、処理を終了する。なお、この場合、ＣＰＵ１０が「サブ回路１１は異常」と判定し、サブ回路１１が「ＣＰＵ１０は異常」と判定しているので、サブ回路１１による「ＣＰＵ１０は異常」の判定結果が優先される。 If the determination result “CPU is normal” is not acquired (NO in S19), the CPU 10 notifies that the output is from the sub-circuit 11 (S20), and the process is terminated. If the determination result “CPU 10 is normal” cannot be acquired from the sub-circuit 11 (NO in S14), the CPU 10 ends the process. In this case, since the CPU 10 determines that “the sub circuit 11 is abnormal” and the sub circuit 11 determines that “the CPU 10 is abnormal”, the determination result “CPU 10 is abnormal” by the sub circuit 11 is given priority. .
　図４は本実施の形態のＣＰＵ１０の処理手順の他の例を示すフローチャートである。なお、図３に示す処理と図４に示す処理とは独立に行われる。ＣＰＵ１０は、監視回路１２から切替信号を取得し（Ｓ３１）、取得した切替信号が灯色信号へ切り替える切替信号であるか否かを判定する（Ｓ３２）。 FIG. 4 is a flowchart showing another example of the processing procedure of the CPU 10 of the present embodiment. Note that the processing shown in FIG. 3 and the processing shown in FIG. 4 are performed independently. The CPU 10 acquires a switching signal from the monitoring circuit 12 (S31), and determines whether or not the acquired switching signal is a switching signal for switching to a lamp color signal (S32).
　灯色信号へ切り替える切替信号である場合（Ｓ３２でＹＥＳ）、ＣＰＵ１０は、サブ回路１１から取得した灯色表示状態、サブ回路１１に対する判定結果を表示灯で通知し、又は上位装置３００へ通知し（Ｓ３３）、処理を終了する。 When the signal is a switching signal for switching to the lamp color signal (YES in S32), the CPU 10 notifies the lamp color display state acquired from the sub circuit 11 and the determination result for the sub circuit 11 with the display lamp or notifies the host device 300. (S33), the process ends.
　灯色信号へ切り替える切替信号でない場合（Ｓ３２でＮＯ）、ＣＰＵ１０は、監視回路１２から閃光信号へ切り替えるための切替信号を取得しているので、閃光信号出力状態である旨を表示灯で通知し、又は上位装置３００へ通知し（Ｓ３４）、処理を終了する。 If it is not a switching signal for switching to the lamp color signal (NO in S32), the CPU 10 has acquired a switching signal for switching to the flash signal from the monitoring circuit 12, and therefore notifies the fact that it is in the flash signal output state with the indicator lamp. Or, the host device 300 is notified (S34), and the process is terminated.
　図５は本実施の形態のサブ回路１１の処理手順の一例を示すフローチャートである。サブ回路１１は、ＣＰＵ１０の正常／異常の判定処理を行う（Ｓ４１）。サブ回路１１は、ＣＰＵ１０が正常であるか否かを判定し（Ｓ４２）、「ＣＰＵ１０は正常」と判定した場合（Ｓ４２でＹＥＳ）、「ＣＰＵ１０は正常」との判定結果を所定の間隔で監視回路１２へ送出し（Ｓ４３）、処理を終了する。 FIG. 5 is a flowchart showing an example of the processing procedure of the sub-circuit 11 of the present embodiment. The sub-circuit 11 performs normal / abnormal determination processing of the CPU 10 (S41). The sub-circuit 11 determines whether or not the CPU 10 is normal (S42). When it is determined that “CPU 10 is normal” (YES in S42), the determination result that “CPU 10 is normal” is monitored at a predetermined interval. The data is sent to the circuit 12 (S43), and the process is terminated.
　「ＣＰＵ１０は正常」ではないと判定した場合（Ｓ４２でＮＯ）、「ＣＰＵ１０は異常」との判定結果を所定の間隔で監視回路１２へ送出し（Ｓ４４）、処理を終了する。 If it is determined that “CPU 10 is not normal” (NO in S42), the determination result “CPU 10 is abnormal” is sent to the monitoring circuit 12 at a predetermined interval (S44), and the process is terminated.
　図６は本実施の形態のサブ回路１１の処理手順の他の例を示すフローチャートである。なお、図５に示す処理と図６に示す処理とは独立に行われる。サブ回路１１は、自己診断処理を行う（Ｓ５１）。自己診断処理は、例えば、サブ回路１１が一定周期で現示データ１３などの内部データの正常／異常を診断する処理である。 FIG. 6 is a flowchart showing another example of the processing procedure of the sub-circuit 11 of the present embodiment. Note that the processing shown in FIG. 5 and the processing shown in FIG. 6 are performed independently. The sub-circuit 11 performs self-diagnosis processing (S51). The self-diagnosis process is, for example, a process in which the sub-circuit 11 diagnoses normal / abnormality of internal data such as the display data 13 at a constant cycle.
　サブ回路１１は、自己診断により自身が正常であるか否かを判定し（Ｓ５２）、正常であると判定した場合（Ｓ５２でＹＥＳ）、「サブ回路１１は正常」との自己診断結果（判定結果）を所定の間隔で監視回路１２へ送出し（Ｓ５３）、処理を終了する。なお、ステップＳ５３で、「サブ回路１１は正常」との自己診断結果を送出する際に、図５のステップＳ４３又はステップＳ４４の判定結果も含めて同じタイミングで送出する。 The sub-circuit 11 determines whether or not it is normal by self-diagnosis (S52). If it is determined that it is normal (YES in S52), the self-diagnosis result (determination) is “sub-circuit 11 is normal”. The result is sent to the monitoring circuit 12 at a predetermined interval (S53), and the process is terminated. In step S53, when the self-diagnosis result “sub-circuit 11 is normal” is sent, it is sent at the same timing including the determination result in step S43 or step S44 in FIG.
　正常でないと判定した場合（Ｓ５２でＮＯ）、サブ回路１１は、「サブ回路１１は正常」との自己診断結果（判定結果）の送出を停止し（Ｓ５４）、処理を終了する。この場合、監視回路１２は、「サブ回路１１は正常」との自己診断結果が所定の間隔で送出されなくなったことを検出して、サブ回路１１が異常であることを判定することができる。 If it is determined that it is not normal (NO in S52), the sub-circuit 11 stops sending the self-diagnosis result (determination result) that “the sub-circuit 11 is normal” (S54), and ends the process. In this case, the monitoring circuit 12 can determine that the sub-circuit 11 is abnormal by detecting that the self-diagnosis result that “the sub-circuit 11 is normal” is not transmitted at a predetermined interval.
　図７は本実施の形態の監視回路１２の処理手順の一例を示すフローチャートである。監視回路１２は、サブ回路１１からの判定結果を所定の間隔で取得したか否かを判定し（Ｓ６１）、所定の間隔で取得した場合（Ｓ６１でＹＥＳ）、サブ回路１１の判定結果は「ＣＰＵ１０は異常」であるか否かを判定する（Ｓ６２）。 FIG. 7 is a flowchart showing an example of the processing procedure of the monitoring circuit 12 of the present embodiment. The monitoring circuit 12 determines whether or not the determination result from the sub circuit 11 is acquired at a predetermined interval (S61). When the monitoring circuit 12 acquires the determination result at a predetermined interval (YES in S61), the determination result of the sub circuit 11 is “ It is determined whether or not the CPU 10 is “abnormal” (S62).
　サブ回路１１の判定結果が「ＣＰＵ１０は異常」でない場合（Ｓ６２でＮＯ）、監視回路１２は、ＣＰＵ１０の判定結果は「サブ回路１１は異常」であるか否かを判定する（Ｓ６３）。ＣＰＵ１０の判定結果は「サブ回路１１は異常」である場合（Ｓ６３でＹＥＳ）、監視回路１２は、閃光表示に切り替える切替信号を出力し（Ｓ６４）、処理を終了する。 If the determination result of the sub circuit 11 is not “CPU 10 is abnormal” (NO in S62), the monitoring circuit 12 determines whether the determination result of the CPU 10 is “sub circuit 11 is abnormal” (S63). When the determination result of the CPU 10 is “sub circuit 11 is abnormal” (YES in S63), the monitoring circuit 12 outputs a switching signal for switching to flash display (S64), and the process is terminated.
　ＣＰＵ１０の判定結果は「サブ回路１１は異常」でない場合（Ｓ６３でＮＯ）、監視回路１２は、ＣＰＵ１０のサブ回路１１も正常であると判定し、ステップＳ６４の処理を行わずに処理を終了する。 When the determination result of the CPU 10 is not “abnormality of the sub circuit 11” (NO in S63), the monitoring circuit 12 determines that the sub circuit 11 of the CPU 10 is also normal, and ends the process without performing the process of step S64. .
　サブ回路１１からの判定結果を所定の間隔で取得しなかった場合（Ｓ６１でＮＯ）、監視回路１２は、サブ回路１１が異常であると判定し、ステップＳ６４の処理を行う。また、サブ回路１１の判定結果が「ＣＰＵ１０は異常」である場合（Ｓ６２でＹＥＳ）、監視回路１２は、サブ回路１１の自己判断に基づく歩進が行われているとして、処理を終了する。 If the determination result from the sub circuit 11 is not acquired at a predetermined interval (NO in S61), the monitoring circuit 12 determines that the sub circuit 11 is abnormal, and performs the process of step S64. When the determination result of the sub circuit 11 is “CPU 10 is abnormal” (YES in S62), the monitoring circuit 12 ends the process on the assumption that the step based on the self determination of the sub circuit 11 is being performed.
　開示された実施の形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　１０　ＣＰＵ（主制御部）
　１１　サブ回路（副制御部）
　１２　監視回路（監視部）
　１３　現示データ
　１４　切替回路
　１５　閃光回路
　１６　灯色出力回路
　１７　インタフェース部（通知部）
　１８　通知部(通知部) 10 CPU (main control unit)
11 Sub circuit (sub control unit)
12 Monitoring circuit (monitoring unit)
13 Present data 14 Switching circuit 15 Flash circuit 16 Light color output circuit 17 Interface section (notification section)
18 Notification section (notification section)

Claims (4)

  1. 　灯色情報に基づいて信号灯器の灯色を切り替えるための歩進指令を出力する主制御部と、該主制御部が出力した歩進指令に基づいて灯色信号を出力する副制御部とを備える交通信号制御機において、
    　前記副制御部は、
    　前記主制御部の正常／異常を判定し、所定の間隔で判定結果を送出するようにしてあり、
    　前記副制御部が送出する判定結果を監視する監視部を備え、
    　該監視部は、
    　前記副制御部による判定結果の取得可否に応じて該副制御部の正常／異常を判定し、前記副制御部が異常であると判定した場合、信号灯器を閃光表示させるための閃光指示信号を出力するように構成してあることを特徴とする交通信号制御機。     A main control unit that outputs a step command for switching the lamp color of the signal lamp based on the lamp color information, and a sub-control unit that outputs a lamp color signal based on the step command output by the main control unit. In the traffic signal controller provided,
    The sub-control unit
    The main control unit is determined to be normal / abnormal, and a determination result is transmitted at a predetermined interval.
    A monitoring unit for monitoring the determination result sent by the sub-control unit;
    The monitoring unit
    The sub-control unit determines whether the sub-control unit is normal or abnormal according to whether the sub-control unit can obtain the determination result. When the sub-control unit determines that the sub-control unit is abnormal, A traffic signal controller configured to output.
  2. 　前記副制御部は、
    　自身の正常／異常を判定し、異常であると判定した場合、前記判定結果の送出を停止するように構成してあることを特徴とする請求項１に記載の交通信号制御機。     The sub-control unit
    2. The traffic signal controller according to claim 1, wherein the traffic signal controller is configured to determine its own normality / abnormality and stop sending the determination result when it is determined to be abnormal.
  3. 　前記監視部は、
    　信号灯器を閃光表示させるか否かを示す指示信号を前記主制御部へ送出するようにしてあることを特徴とする請求項１又は請求項２に記載の交通信号制御機。     The monitoring unit
    The traffic signal controller according to claim 1 or 2, wherein an instruction signal indicating whether or not the signal lamp is to be flashed is sent to the main control unit.
  4. 　前記監視部が送出した指示信号に応じた判定結果を外部へ通知する通知部を備えることを特徴とする請求項３に記載の交通信号制御機。 The traffic signal controller according to claim 3, further comprising a notification unit that notifies a determination result according to an instruction signal transmitted by the monitoring unit to the outside.
PCT/JP2012/053319 2012-02-14 2012-02-14 Traffic signal controller WO2013121513A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002274378A (en) * 2001-03-22 2002-09-25 Nippon Signal Co Ltd:The Core breakage detector for signal lighting apparatus
JP2007143730A (en) * 2005-11-25 2007-06-14 Heiwa Corp Game machine
JP2007299201A (en) * 2006-04-28 2007-11-15 Kyosan Electric Mfg Co Ltd Traffic signal apparatus
JP2010277358A (en) * 2009-05-28 2010-12-09 Sumitomo Electric Ind Ltd Traffic signal control unit and abnormality determination method for traffic signal control unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002274378A (en) * 2001-03-22 2002-09-25 Nippon Signal Co Ltd:The Core breakage detector for signal lighting apparatus
JP2007143730A (en) * 2005-11-25 2007-06-14 Heiwa Corp Game machine
JP2007299201A (en) * 2006-04-28 2007-11-15 Kyosan Electric Mfg Co Ltd Traffic signal apparatus
JP2010277358A (en) * 2009-05-28 2010-12-09 Sumitomo Electric Ind Ltd Traffic signal control unit and abnormality determination method for traffic signal control unit

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