Method for automatically detecting deflection fault of railway wagon locking plate

Abstract

The invention relates to a method for automatically detecting a deflection fault of a railway wagon locking plate and belongs to the field of railway detection. A fault-free target automatic identification mode is adopted; the method is on the basis of an approximate linear segment outline of an object and adopts linear segment characteristics to describe; the requirement on a memory is effectively reduced; the direction of a linear segment is subjected to directional encoding on the basis of the linear segment characteristics and an interval of the directional encoding is the maximum normal deflection angle of the locking plate; and finally, estimation on a deflection range is implemented by utilizing directed Chamfer matching. The method uses the simple characteristics, is not influenced by the position of a target and variation of surface texture and has strong robustness and noise immunity; in a complex scene, the range of the deflection angle can be accurately estimated and the position of the fault-free locking plate can be accurately positioned; in the whole process, only one template is required; identification efficiency is ensured; and the method lays a foundation for engineering application of fault image identification of a railway wagon.

Description

technical field [0001] The invention relates to a method in the technical field of image processing, in particular to a visual image detection method for a deflection fault of a locking plate of a railway freight car, which belongs to the field of railway detection. 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 te...

AI Technical Summary

Problems solved by technology

If this failure is not detected in time and repaired, it will further cause the bolts to fall off and break, which will lead to major traffic accidents.

[0005] Usually, the detection of the deflection fault of the locking plate of the domestic railway freight car is mainly carried out manually. This detection method is time-consuming and laborious and the maintenance cost is high.

Images