23 February 2009 Wheel profile dynamic inspection system based on slit diode laser
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Flange Height and Flange Thickness are vital parameters for train wheels. Usually, they are manually measured by wheel vernier after train stopped. This article introduces a dynamic wheel inspection system. Pulsed slit diode lasers project onto wheel tread while train is in motion, CCD cameras record light-section images of wheel profile. Geometric parameters and profile of wheel are measured on basis of image processing. This paper introduces measuring principle and structure of this inspection system, analyzes influences resulted from laser parameters and environment, designs instantaneous high-powered slit diode laser and narrowband optical filter according to ±0.2mm accuracy requirement and environment situation.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yu Zhang, Yu Zhang, Jianping Peng, Jianping Peng, Xiaorong Gao, Xiaorong Gao, Zeyong Wang, Zeyong Wang, Quanke Zhao, Quanke Zhao, Chaoyong Peng, Chaoyong Peng, Kai Yang, Kai Yang, "Wheel profile dynamic inspection system based on slit diode laser", Proc. SPIE 7198, High-Power Diode Laser Technology and Applications VII, 71981O (23 February 2009); doi: 10.1117/12.808438; https://doi.org/10.1117/12.808438

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