基于激光轮廓仪的非接触式钢轨廓形检测系统

doi:10.16180/j.cnki.issn1007-7820.2020.08.005

Abstract

Abstract:

At present, the geometrical dimension measurement of the rail profile is mostly based on manual measurement. The high-precision profile detection system based on the laser profiler can improve work efficiency of manual measurement and reduce measurement errors. The median filtering method was used to preprocess the profile data collected by the laser profilometer, and the coordinate system was transformed by coordinate translation and coordinate rotation. Then, the appropriate feature point was selected by quadratic fitting to match the silhouette stitching. After field test, the repeated measurement error of the rail profile size was less than 0.1 mm, and the absolute measurement accuracy was up to 0.014 mm. These experimental value met the requirements of the national standard for the detection accuracy of the rail profile, indicating the proposed method could effectively improve the detection efficiency of the rail.

Key words: rail profile, median filtering, coordinate transformation, laser profiler, profile detection, quadratic fitting

CLC Number:

TP278

BAO Yajun,LIU Jin,YANG Haima,JIANG Shenghua,YUAN Baolong,YANG Ping. Non-contact Rail Profile Detection System Based on Laser Profiler[J].Electronic Science and Technology, 2020, 33(8): 28-33.

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廓形参数	最大值	最小值	极限误差	标准差
钢轨高	176.068	176.017	0.051	0.014
轨头宽	70.569	70.511	0.058	0.016
轨底宽	150.001	149.951	0.050	0.014
轨腰宽	18.684	18.629	0.055	0.014

廓形参数	系统测量值			对比误差
廓形参数	最大值	最小值	平均值	对比误差
钢轨高	176.068	176.017	176.050	176.040	0.010
轨头宽	70.569	70.511	70.540	70.550	0.010
轨底宽	150.001	149.951	149.974	149.980	0.006
轨腰宽	18.684	18.629	18.664	18.650	0.014

Non-contact Rail Profile Detection System Based on Laser Profiler

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