Automatic on-line diagnosis method for freight train coupler tail cotter position faults and system

Abstract

The invention relates to an automatic on-line diagnosis method for freight train coupler tail cotter position faults and a system. The system comprises an image acquisition portion and a diagnosis portion, wherein the diagnosis portion comprises a positioning module and an identification module, the image acquisition portion is used for acquiring a coupler image, the coupler image is positioned and identified respectively by the positioning module and the identification module in the diagnosis portion, the positioning module is used for determining a position of the coupler tail cotter in the coupler image, the identification module is used for determining whether a bolt is lost according to the coupler image acquired by the positioning module, through the positioning module, normalized gradient amplitude characteristics and gradient histogram characteristics in six directions are combined to form composite dimension characteristics, the position of the coupler tail cotter can be acquired by utilizing a linear support vector machine (SVM); for the identification module, difference between the normal coupler tail cotter image and a bolt-lost cotter image are extracted by utilizing Haar characteristics, and an Adaboost decision tree is taken as a final classifier to determine whether a fault is generated.

Description

technical field

[0001] The invention relates to an automatic on-line diagnosis method and system for the failure of a freight train coupler flat pin, which belongs to the freight train fault diagnosis technology. Background technique

[0002] The coupler buffer device is an important part of the freight train connection system. It is mainly composed of two parts: the coupler and the buffer. The coupler and buffer are held together by bolts on the coupler flat pin. If the coupler bolts are lost, the coupler will separate from the buffer, which can lead to separation between the train bodies, resulting in a major accident. Therefore, fault diagnosis is the key to ensure the safe operation of freight trains. To ensure the connection between the coupler and the bumper, the coupler bolts are usually checked manually by experienced inspectors. However, this detection method is very labor-intensive and time-consuming, which brings high maintenance costs and limits the improvemen...

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