traffic signal controller
A technology of traffic signals and controllers, which is applied in traffic control systems, traffic control supervision, road vehicle traffic control systems, etc. It can solve the problems of inability to step in stages and obtain step instructions, and achieve the effect of reducing the impact
Active Publication Date: 2017-04-05
SUMITOMO ELECTRIC IND LTD
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Problems solved by technology
In addition, when an abnormality occurs in the state where the CPU 201 outputs a step (light color step) storage command to the sub-circuit 202, the sub-circuit 202 cannot acquire the step command, and there is also a problem that the step cannot be performed.
Method used
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[0044] Hereinafter, embodiments of the traffic signal controller of the present invention will be described with reference to the drawings. figure 1 It is a block diagram showing an example of the structure of the traffic signal controller 100 of this embodiment. The traffic signal controller 100 has 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, current display data 13, switching circuit 14, flashing circuit 15, light color output circuit 16, and the like. The subcircuit 11 is constituted by hardware circuits such as FPGA (Field Programmable Gate Array: Field Programmable Gate Array), for example.
[0045] The CPU 10 sends the lamp color display state recognized by the CPU 10 to the sub-circuit 11 every third predetermined time T3 (for example, 0.5 second, 1 second, etc.). In this embodiment, the step command of the prior art is included in the lamp color display state. That is, the CPU 10 sends to the...
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Provided is a traffic signal controller that makes it possible to improve reliability through early detection of an abnormality and reduction of the impact of the abnormality. On the basis of indication data, a CPU (10) sends a step command for switching the light color of a signal light unit (1) to a sub-circuit (11). On the basis of the step command, the sub-circuit (11) outputs a light color signal for switching the light color of the signal light unit (1) to a switching circuit (14). The CPU (10) determines whether the sub-circuit (11) is normal or abnormal, and outputs the determination result to a monitoring circuit (12). The sub-circuit (11) outputs a determination result of whether the CPU (10) is normal or abnormal to the monitoring circuit (12). On the basis of the acquired determination results, the monitoring circuit (12) determines whether the CPU (10) and the sub-circuit (11) are normal or abnormal, and in accordance with this determination result, sends a switching signal for switching to a light color signal or a flashing light signal to the switching circuit (14).
Description
technical field [0001] The invention relates to a traffic signal control machine for switching the light colors of a plurality of signal lamps. Background technique [0002] The traffic signal control machine switches the light colors of each signal light according to the current display data including the light color information, the display time of each light color, etc. that determine the light color of each signal light in each step (stage) - Bulletin No. 111395). And, the traffic signal controller monitors whether its own state is normal. According to the predetermined current display data, the traffic signal controller determines that the normal three-color light colors (red, yellow, green) of the signal light cannot be controlled by the light color, and the signal light is flashed according to the flash signal from the flash circuit. Display (for example, the combination of yellow flashing and red flashing, red flashing, etc.), so as to remind the attention of vehic...
Claims
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IPC IPC(8): G08G1/095
CPCG08G1/095G08G1/097
Inventor 三浦正宏下浦弘坂口政广川西弘明吉村公志
Owner SUMITOMO ELECTRIC IND LTD