光学精密工程2017，Vol.25Issue(3)：616-624,9.DOI:10.3788/OPE.20172503.0616
点云频域配准的双目双线结构光列车轮对检测
Detection of wheel-set size of rail vehicle using double 2D laser displacement sensors based on point cloud data registration in frequency domain
摘要
Abstract
Detection method for train wheel set was proposed based on binocular and double-line structured light for solving the problem that rim and tread of the whole wheel can not be detected due to the limited measurement scope and shield of single-line structured light and other relevant reasons.Two groups of line structured sensor were employed in the measurement and data aquisition.Each group contained two laser displacement sensors.Point cloud matrix was restored with point cloud data on section in the process of registration of point cloud produced by the sensors,then was coverted by Fourier transform.In calculation of rotation angle,polar coordinates were conversed firstly and the cross-power spectrum of two matrices was solved finally to obtain rotation and translation matrices of the point cloud.During the process,Fourier inversion transform of noise-free cross-power spectrum was replaced by Sinc function approximation to determine that the noise in the registration of frequency domain had no influence on determination of registration parameters.Then datum plane was fitted with relative value comparison algorithm and Principal Component Analysis (PCA) to calibrate the diameter directions of wheel set.The canning data was processed with calibration values to acquire the dimension parameters of wheel set,such as diameter,radial runout of rolling circle.The result shows that the measurement error of the binocular and double-line detection system based on point cloud registration in frequency domain is less than-0.05 mm in diameter,the axial runout is less than ±0.06 mm and radial runout of wheel is less than ±0.04 mm.Compared with standard wheel set detection technology,this system meets the requirements for precision of wheel set detection.关键词
非接触测量/结构光/轮对检测/双目双线/点云频域配准Key words
non-contact measurement/line structured light/wheel-set detection/point cloud data registration in the frequency domain/couple 2D laser分类
通用工业技术引用本文复制引用
王华,邢春齐,高金刚,张爽,朱可可..点云频域配准的双目双线结构光列车轮对检测[J].光学精密工程,2017,25(3):616-624,9.基金项目
吉林省科技发展计划资助项目(No.20160204005GX) （No.20160204005GX）
