Method for automatically detecting handle loss fault of angle cock of railway wagon

Abstract

The invention relates to a method for automatically detecting a handle loss fault of an angle cock of a railway wagon in the technical field of image processing. Characteristic vectors required for fault detection are established by adopting gradient encoding histogram characteristics; a positioning classifier and a verification classifier which are required for detection are trained by adopting a linear support vector machine; and by adopting a hierarchical cascading detection idea, firstly, the positioning classifier is utilized to position the integral angle cock and then the verification classifier is utilized to verify whether a handle on the angle cock is lost so as to implement full-automatic detection on the handle loss fault of the angle cock, and any labor does not need to participate in the process. According to the invention, the fault detection rate reaches 99.8 percent, the detection speed reaches 6 frames per second, and the requirements of practical application are met.

Description

technical field [0001] The invention relates to a method in the technical field of image processing, in particular to an automatic detection of a lost fault of a knuckle plug door handle of a railway freight car. Background technique [0002] To ensure safe operation, fault detection plays a major role in the transportation field. There are a large number of typical examples of using fault detection in railway, aviation, marine and highway bridge maintenance. Due to the heavy responsibility in the field of transportation, once important equipment fails, it will cause huge losses of personnel and property. Therefore, many countries in the world have invested a lot of manpower, material resources and financial resources in the research of fault detection. Fault detection has become one of the research hotspots in the field of transportation today. [0003] Fault detection is usually realized by means of non-destructive testing. Non-destructive testing is a very broad name t...

AI Technical Summary

Problems solved by technology

Once the angle cock is closed abnormally, the air passage will be blocked and the brake system of the vehicle behind will fail. When the truck needs to brake, the air brake function will be affected, and the braking force will drop. In severe cases, the truck will rush forward. rear-end accident

It is precisely because of the importance of the knuckle plug door that in order to ensure the safety of the knuckle plug door, experienced train inspectors often manually check whether the knuckle plug door handle is in the correct position. The handle of the plug door is lost, which makes it difficult to correctly judge and change the state of the corner plug door. It is a frequent and serious fault

In China, the detection of missing door handles of truck knuckle plugs is still mainly carried out manually. This detection method is time-consuming and labor-intensive and the maintenance cost is high.

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