Deviation correction method for measurement of rail wear based on laser vision

Abstract

The invention discloses a deviation correction method for measurement of rail wear based on laser vision, comprising the steps of dividing a rail waist profile of a characteristic profile of dividing a cross section of a rail obtained by the measurement by a laser vision sensor into a rail waist big circle and a rail waist small circle; fitting a rail longitudinal shaft line according to a tangent point of the rail waist big circle and the rail waist small circle; projecting the characteristic profile to an auxiliary plane which is vertical to the rail longitudinal shaft line to obtain a projection profile of the cross section of the rail; and calculating the wear value of the cross section of the rail by aligning a standard profile of the cross section of the rail with the projection profile. The measurement error of the rail wear caused by that a light plane projected by the laser vision sensor is not vertical to the rail longitudinal shaft line can be eliminated based on the method.

Description

technical field [0001] The invention relates to laser vision measurement technology, in particular to a deviation correction method for laser vision rail wear measurement. Background technique [0002] Regular inspection of rails is very important for reasonable planning and low-cost maintenance of railway transportation: on the one hand, in the early stages of rail wear and deformation, rail inspection helps to formulate a reasonable railway maintenance schedule to avoid dangerous situations; On the other hand, effective track inspection will lay the foundation for the transformation of track from periodic maintenance to condition-based maintenance, so that limited manpower and equipment resources can be better utilized, and track maintenance costs can be effectively saved. [0003] At present, many research institutions and scholars at home and abroad have studied the detection methods of rail wear, and successfully developed various measuring devices. According to differe...

AI Technical Summary

Problems solved by technology

However, during the installation process of the laser vision sensor, it is difficult to ensure that the light plane projected by it is perpendicular to the longitudinal axis of the rail

In addition, the laser vision sensor is installed at the bottom of the train. When the train is running, the light plane projected by the laser vision sensor is not perpendicular to the longitudinal axis of the rail due to the vibration of the train, thereby reducing the accuracy of rail wear measurement.

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