A dynamic measurement of train wheel parameters based on light knife method

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2023, Vol.46 No.4: 447-451, 457

DOI: 10.3969/j.issn.1003-5060.2023.04.003

Authors

ZHANG Kunpeng $ ^{1,2,3} $, FANG Suping $ ^{1,2,3} $, ZHOU Lihua $ ^{1,2,3} $

(1. Anhui Province Key Laboratory of Aerospace Structural Parts Forming Technology and Equipment, Hefei University of Technology, Hefei 230009, China; 2. Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China; 3. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: In order to solve the problem of insufficient measurement accuracy in the dynamic measurement of train wheel parameters, a dynamic measurement method of train wheel parameters based on the light knife method is proposed, and the influence of laser linewidth on the measurement results is analyzed. Firstly, the measurement system was modeled by Solidworks software, and the camera module was adjusted according to the camera parameters in the light knife method. Then, the images at specific locations were preprocessed by RGB extraction, distortion correction, graying and center extraction. Wheel parameters such as wheel diameter, rim width and flange height were calculated by feature point extraction and curve fitting. Finally, a single side wheel experiment was carried out to verify that the measurement accuracy of the proposed method can meet the actual measurement requirements.

Keywords: light knife method; wheel parameter; dynamic measurement; simulation

作者信息

张坤朋 $ ^{1,2,3} $，方素平 $ ^{1,2,3} $，周丽华 $ ^{1,2,3} $

（1. 合肥工业大学航空结构件成形制造与装备安徽省重点实验室，安徽合肥 230009；2. 合肥工业大学工业与装备技术研究院，安徽合肥 230009；3. 合肥工业大学机械工程学院，安徽合肥 230009）

摘要和关键词

摘要: 针对在列车车轮参数动态测量中测量精度不足的问题, 文章提出一种基于光刀法的列车车轮参数动态测量方法, 并分析激光线宽度对测量结果的影响。首先用 Solidworks 软件对测量系统进行三维建模, 并根据光刀法中的相机参数对软件相机模块进行调整; 然后对特定位置图片进行 RGB 提取、畸变矫正、灰度化和中心提取等预处理, 并利用特征点提取、曲线拟合的方法计算得到车轮直径、轮辋宽度和轮缘高度等车轮参数; 最后利用单边轮实验进行验证, 结果表明该文方法的测量精度满足实际测量需求。

关键词: 光刀法；车轮参数；动态测量；仿真

Funding

中央高校基本科研业务费专项资金资助项目（PA2021GDSK0096）

合肥工业大学学报(自然科学版)

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