System and method for high-speed detection of loosening of railway fasteners on basis of infrared thermal imaging

Abstract

The invention discloses a system and a method for high-speed detection of loosening of railway fasteners on the basis of infrared thermal imaging. The system comprises two detectors, a controller and cables, the two detectors are positioned on the lower side of a body of a train and respectively opposite to the upper side of a left steel rail and the upper side of a right steel rail, the controller is mounted in a carriage and connected with the two detectors by the cables, digital infrared cameras are arranged inside the detectors, and whether the fasteners are loosened or lost or not is automatically judged by direct acquisition of infrared thermal images generated by contact stress of the fasteners and the steel rails, image processing and mode identification. The viewing field of each camera is centered at the position of the corresponding fastener, and image sampling and processing are carried out in selective small ranges of the fields of the view. During running of the train, sampling interval is adjusted if the positions of the fasteners are improper. Whether the maximum stress points in the infrared images are lower than a critical threshold or not is judged by an industrial computer so as to judge whether the fasteners are loosened or not, warning signals are transmitted if the fasteners are loosened, and early warning is realized before the fasteners are lost.

Description

technical field [0001] The invention relates to equipment in the field of railway infrastructure detection, in particular to a high-speed detection system for loose railway fasteners based on infrared thermal imaging. Background technique [0002] As a major project related to the national economy and the people's livelihood, the safety and maintenance of railway is very important. With the increase of railway mileage and the increase of train speed, the demand for monitoring the status of railway infrastructure has risen rapidly. Fasteners are one of the most critical facilities in railway infrastructure, and the absence of fasteners will have a decisive impact on traffic safety. Traditional manual inspection and maintenance can no longer meet the requirements, so various track inspection equipment came into being. At present, the detection methods of railway fasteners are mainly divided into the following three types: [0003] The first is manual inspection: railway mai...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of lack of existing fastener loosening detection technology, the present invention proposes a high-speed detection system and method for railway fastener loosening based on infrared thermal imaging, which utilizes an infrared high-speed camera for continuous and high-speed real-time image acquisition of the fastener area , through image processing and pattern recognition to draw the conclusion of whether the fastener is loose or not, and realize the high-speed detection and early warning of railway fastener looseness

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