System and method for fault diagnosis of traffic signal controller

Abstract

The invention discloses a system and a method for fault diagnosis of a traffic signal controller. The method comprises the following steps: a fault detection board is connected with a plurality of voltage and current detection boards; the voltage and current detection boards are used for detecting the voltage and the current information of each path of alternating current output of the traffic signal controller, the fault detection board performs communication with each voltage and current detection board at regular time, searches the voltage and the current information and performs green conflict detection and other fault judgment for the traffic signal controller according to the defined rule in advance; under the unusual circumstance, a master control board of the traffic signal controller is warned, and the concrete fault type is displayed through an indicating lamp of the panel; if a serious fault occurs, the fault detection board provides an alternating current relay output signal to control the output of the traffic signal controller so as to switch the traffic signal controller to a flashing yellow state; and the invention provides the fault diagnosis system and the fault diagnosis method which are independent from the traffic signal controller, can perform real-time monitoring and fault analysis to the running state of the signal controller and fills the gap of the prior art.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic control and management, and relates to a fault diagnosis for a road traffic signal controller. Background technique [0002] The traffic signal controller is used for traffic light signal control at urban road intersections, pedestrian crossings and expressway entrances. It is an important part of the traffic signal control system for commanding and guiding vehicles. Its safety and reliability are directly related to traffic operation safety. Since the signal controller is installed at the intersection of the city, the working environment is harsh and it is susceptible to external interference, which may cause signal lamp failures, thyristor failures, etc. If these failures cannot be diagnosed and dealt with in time, traffic accidents may be induced and traffic jams may be caused. cause serious consequences. Therefore, it is of great significance to monitor the operation status of the...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing traffic signal controllers pay more attention to the realization of the function of the signal controller in the design and production process, but less consideration is given to the fault diagnosis technology of the signal controller, which cannot well meet the requirements of the actual working environment of the signal controller

The signal controller with fault detection function generally does not have an independent fault detection module, but is integrated into the signal controller. Once the signal controller fails to operate, the fault detection function will also fail, and the function of fault detection and diagnosis cannot be achieved.

Moreover, the detection fault type is single, and generally only green conflict faults are detected

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