Research on Rail Profile Measurement Method Based on Machine Vision
Yu Meng, Feng Chen, Xiaodong Hao, Yile Liu, Jun Jiang · 2020
As an important part of the railway system, the qualified quality of steel rail is an important guarantee for the safety of railway running, and efficient and accurate rail parameter measurement and detection methods are widely studied. Based on the analysis of the existing methods of rail profile detection in China, the laser triangulation method is used to realize the dynamic measurement of the rail profile size; A method based on the minimum distance method is proposed to extract the coordinate points of the contour coincidence area to realize the accurate splicing of the rail contours. The measurement method of the important characteristic parameters of the rail profile is proposed and the measurement principle diagram is designed; The static test and dynamic test of the rail sample are carried out respectively by using the rail profile on-line detection system, and the obtained static repeat measurement accuracy and dynamic measurement error are consistent Industry norms and standards have verified the accuracy and repeatability of the system.