Method and device for detecting width of rail joint seam of steel rail

Abstract

The invention discloses a method and a device for detecting the width of a rail joint seam of a steel rail, and the method comprises the steps: determining a steel rail top surface region from a railimage according to the pixel gray scale of the rail image; determining a steel rail joint rail gap region from the steel rail top surface region according to the pixel gray scale of the steel rail topsurface region; identifying the upper edge and the lower edge of the rail joint seam of the steel rail based on edge detection according to the rail joint seam area of the steel rail; and determiningthe width of the rail joint seam according to the upper edge and the lower edge of the rail joint seam. Compared with an existing method for manually detecting the width of the rail joint seam, the rail joint seam area can be automatically detected on the basis of the gray characteristics of the rail joint seam on the rail image; the upper edge and the lower edge of the rail joint seam of the steel rail are automatically recognized based on the edge detection technology, the width of the rail joint seam of the steel rail is determined, the efficiency and accuracy of rail joint seam width detection are improved, and a reliable basis is provided for rail maintenance.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method and a device for detecting the width of a rail joint rail gap. Background technique [0002] The rail joint is the weak link of the track, and its structural feature is that two splints and several fixing bolts connect the two rails. There is a rail gap in the rail joint, which destroys the continuity of the rail. When the wheel rolls to the joint, the joint part is subjected to a large impact load. When the rail gap is improperly set during rail change or the rail expansion and contraction changes caused by temperature cause the rail gap to be too large, these impact loads can even reach 4 to 5 times that of the non-joint area, and the larger the rail gap, the greater the impact between the wheel and rail . The impact causes the track joints to be more severely damaged than other parts, resulting in joint defects such as poor joint rail surface and uneven wear. A...

AI Technical Summary

Problems solved by technology

[0003] The existing rail gap width detection relies on manual inspection, for example, using a scale to measure at the rail joint, but this method is slow in detection speed, high in labor costs, and difficult to guarantee the accuracy of detection, which makes the existing It is difficult to provide a reliable reference for the maintenance and repair of the track gap width detection

With the rapid development of machine vision technology, machine vision inspection technology based on image processing has been applied to track status inspection, but machine vision inspection technology is mainly used in track appearance status defects such as rail surface scratches, fasteners and track plate cracks. The detection of rail light strips and the detection of rail light belts do not involve the detection of the width of rail joints

[0004] For the above problems, no effective solution has been proposed

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