Fault detection device for LED traffic lights

A fault detection and traffic light technology, applied in the direction of traffic control supervision, etc., can solve the problems of unable to detect the lack of dot matrix, unable to detect the state conflict fault of LED traffic lights, etc., to achieve the effect of preventing the whole lamp failure

CN102629419BInactive Publication Date: 2014-06-25CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-06-25
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment

[0037] like figure 1 As shown, for the LED traffic lights to be detected by the fault detection device of the present invention, the internal LED strings are connected in series and parallel. In each LED string, a small-value sampling resistor is connected in series to sample the characteristic signal of the working state.