Fault detection device for LED traffic lights

Abstract

The invention discloses a fault detection device for LED traffic lights. The device is mainly composed of a working condition detection module (7), a signal switching detection module (6), a microcontroller (8) and a communication module (9), wherein the microcontroller (8) can carry out time synchronization with a signal controller of the LED traffic lights (1) through the signal switching detection module (6). The microcontroller extracts and stores correct working condition characteristics of the traffic lights under a learning mode, and carries out fault detection on the traffic lights through the working condition detection module (7) with 1 second as a cycle under a monitoring mode, capable of detecting faults of power-off, power-on, lattice deletion, messy code, color conflict, timing error of a full screen light, an arrow light, and a countdown light as well as state conflict of different traffic phases at a same intersection and the like. The device provided in the invention can send various real-time fault information of the LED traffic lights to a management centre, conductive to timely maintenance and prevention of faults of the whole traffic lights, thereby guaranteeing safe, orderly and smooth traffic.

Description

technical field [0001] The invention relates to the technical field of LED traffic lights, in particular to a fault detection device for LED traffic lights. Background technique [0002] In recent years, with the continuous improvement of people's living standards, motor vehicles such as buses and private cars have increased sharply, and LED traffic lights have become an increasingly important part of urban traffic systems. Especially at various intersections, the setting of LED traffic lights is one of the main means of regulating traffic flow. When equipment or environmental reasons cause LED traffic lights to fail, if the traffic management department cannot find out and deal with them effectively in a timely manner, it is easy to cause large-scale traffic jams in crowded urban roads, and even cause some traffic accidents. [0003] LED traffic lights mainly include two categories, namely traffic lights and countdown lights, among which traffic lights have two types: arro...

AI Technical Summary

Problems solved by technology

The LED traffic lights that are widely used now are generally formed by many LED strings through a series-parallel structure. The existing LED traffic light fault detection devices include the above-mentioned fault detection equipment, which can only detect the on and off information of the entire LED traffic light, and cannot Detect the failure of part of the internal dot matrix missing; moreover, the existing detection equipment cannot detect the state conflict of LED traffic lights with different traffic phases at the same intersection

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