Contour registration method based on machine vision train guide rail contour measurement

Abstract

The invention discloses a contour registration method based on machine vision train guide rail contour measurement. The contour measurement comprises the following steps: S1, acquiring a steel rail image; S2, processing the acquired steel rail image by a computer to obtain a single-pixel curve of the cross section of the steel rail; S3, calibrating and restoring; S4, carrying out the contour registration, wherein the contour registration comprises the followings sub steps: S41, integrating a real contour line and a standard contour line into a coordinate system, and obtaining an angle between the real contour line and the standard contour line by utilizing an asymptotic line of the two contour lines; S42, rotating the real contour line, and enabling the asymptotic lines of the two contour lines to be parallel to each other; S53, translating the real contour line, and enabling the end point of the real contour line to be overlapped with the end point of the standard contour line. According to the registration method, the real contour line and the standard contour line are integrated into the coordinate system, the real contour line is processed, the asymptotic lines of the real contour line and the standard contour line are parallel to each other, and the end points of the two contour lines are overlapped, so that the registration result is accurate, convenience in observation and calculation can be realized, and reliable abrasion data can be obtained.

Description

technical field [0001] The invention belongs to the field of image-based non-contact automatic measurement, relates to the fields of image processing, laser and optics, computer, and automatic control, and specifically refers to a contour registration method in the contour measurement of a train guide rail based on machine vision. Background technique [0002] As an important carrier in railway transportation, steel rail is one of the most basic units in railway transportation, and its condition directly affects the safety of train operation. Especially when the train is running at high speed, heavy load, and high density, the wear of the rail increases and the service life is shortened, causing great harm to the safety of the train. In the "maintenance regulations" of railway lines, the Ministry of Railways stipulates the limit value of rail head wear for light and serious rail damage, and requires that when the wear of the rail head is detected to exceed the limit value, i...

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Problems solved by technology

[0004] The mechanical contact measurement method is the most widely used method in our country at present. It main

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