Adverse state detection method of transverse pins of rotation double lugs of high-speed rail overhead contact line equipment

Abstract

The invention discloses an adverse state detection method of transverse pins of rotation double lugs of high-speed rail overhead contact line equipment. The method includes following steps: in a positioning stage, firstly, according to line characteristics of a connecting position at which a cotter pin is located and inclined cantilevers in an image, detecting lower edges of the inclined cantilevers by employing Hough transform and extracting slope characteristics thereof to realize primary positioning of the cotter pin, and then classifying primary positioning pictures by employing a PBoW model; and in a detection stage, performing coarse positioning by employing target geometric distribution characteristics, performing image enhancement by employing a Retinex method according to characteristics of small size, darkness, and weakness of the cotter pin, extracting a circular characteristic of a screw at the connecting position by employing a Hough accumulation matrix, realizing accurate extraction of a circular ring area in which the cotter pin is located, and finally giving detection criteria of deletion of the cotter pin and insufficient field angle according to a in-circular-ring non-communication area distribution rule. According to the method, positioning accuracy of the connecting position of double lugs and the connecting position of upper ends of short diagonal braces and fault detection of falling of the cotter pins and insufficient field angle are realized.

Description

technical field [0001] The invention relates to the field of fault detection of high-speed railway catenary, in particular to an image processing-based detection method for the bad state of the transverse cotter pin at the connection between the two ears of the catenary and the connection at the upper end of the short brace. Background technique [0002] In order to ensure the operation order of high-speed railway EMUs, improve the safety and reliability of its power supply, and meet the needs of the rapid development and operation quality of high-speed railways, my country has built a high-speed railway power supply safety detection and monitoring system (6C system), and uses non-contact detection equipment It is an important part to detect the status of components of catenary suspension system. [0003] Cotter pins play a fixed and protective role in the suspension. Due to vibration fatigue or construction defects during the long-term operation, it may cause undesired stat...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is a method for detecting the bad state of the rotating double lug horizontal pin of the high-speed railway catenary, which can realize the accuracy of the positioning of the joint of the double lug and the connection of the upper end of the short brace, and the detection of the failure of the cotter pin falling off and the insufficient opening angle

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