Light-emitting diode (LED) traffic light failure monitoring system and method

Abstract

The invention provides a light-emitting diode (LED) traffic light failure monitoring system and an LED traffic light fault monitoring method. The system comprises an alternating current power supply and detection unit, an LED light set current detection module, an alternating current on / off control module and a free-wheeling element, wherein the alternating current power supply and detection unit is arranged in a traffic semaphore; the LED light set current detection module, the alternating current on / off control module and the free-wheeling element are arranged outside the traffic semaphore; the LED light set current detection module detects the working current of an LED signal light; when the working current of the LED signal light is lower than a normal working threshold value, the alternating current on / off control module switches off an alternating current loop; and if the alternating current power supply and detection unit cannot detect alternating current, the failure of the LED signal light is determined. By the LED traffic light failure monitoring system and the LED traffic light failure monitoring method, a reliable failure detection result can be obtained without changing a circuit structure of the traffic semaphore in the prior art.

Description

technical field [0001] The invention relates to the technical field of traffic control, in particular to a fault monitoring system and method for an LED traffic signal lamp. Background technique [0002] Traffic signal lights are an important part of traffic signal command and the basic language of road traffic. They are widely used in highway intersections, curves, bridges and other dangerous road sections with potential safety hazards to direct driver or pedestrian traffic, promote smooth traffic, and avoid traffic. Accidents and accidents happen. The traffic signal machine that controls the traffic signal lights to carry out identification and color changes according to certain rules and thus realize the control and management of urban road traffic signals is one of the important components of the modern urban traffic system. [0003] Traditional traffic signal lights are generally incandescent lamps, and incandescent lamps have a short filament life and frequent failure...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that in the prior art, under the premise of not replacing the traffic signal machine, the fault detection circuit for detecting the failure of the incandescent lamp is used to detect the failure of the LED signal lamp with low reliability, and the use of photoresistors cannot satisfy the internal limitation of the LED signal lamp. The reasonable layout of the space increases the complexity of the processing and production of LED signal lamps, resulting in an increase in cost, and then provides a LED signal lamp fault detection circuit with a simple circuit that can accurately detect the LED lamp faults in the LED lamp group

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