Hua WANG, Chun-qi XING, Jin-gang GAO, et al. Detection of wheel-set size of rail vehicle using double 2D laser displacement sensors based on point cloud data registration in frequency domain[J]. Optics and precision engineering, 2017, 25(3): 616-624.
DOI:
Hua WANG, Chun-qi XING, Jin-gang GAO, et al. Detection of wheel-set size of rail vehicle using double 2D laser displacement sensors based on point cloud data registration in frequency domain[J]. Optics and precision engineering, 2017, 25(3): 616-624. DOI: 10.3788/OPE.20172503.0616.
Detection of wheel-set size of rail vehicle using double 2D laser displacement sensors based on point cloud data registration in frequency domain
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.
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references
王君可. 基于CCD成像技术的火车轮对检测系统[D]. 大连: 大连交通大学, 2008.
WANG J K. A Detection System of Train Wheel Based on CCD Imaging Technology [D]. Dalian:Dalian Jiaotong University, 2008.(in Chinese)
刘畅. 列车轮对踏面几何参数检测技术研究[D]. 长春: 长春理工大学, 2014.
LIU CH. Research on Detection Technology of Geometric Parameters of Train Wheelset Tread [D].Changchun:Changchun University of Science and Technology, 2014. (in Chinese)
REN H W, LI SH. Research on the application of online dynamic detection of wheelset based on image [J]. Locomotive & Rolling Stock Technology, 2004(5):29-31. (in Chinese)
FENG Q B, CHEN SH Q, CHUI J Y, et al.. A system for dynamically measuring geometric parameters of wheelset [J]. China Railway Science, 2008, 29(5):138-144. (in Chinese)
XUE Q, CHEN W. Research on the image measurement system of wheel set with double CCD [J]. Microcomputer Information, 2007, 23(19):164-166, 163. (in Chinese)
李学雷. 轮对参数全自动测量系统[D]. 成都: 西南交通大学, 2005.
LI X L. Anautomatic Diagraph for the Parameter of the Wheelset [D]. Chengdu:Southwest Jiaotong University, 2005. (in Chinese)
XING Z Y, CHEN Y J, WANG X H, et al.. Online detection system for wheel-set size of rail vehicle based on 2D laser [J]. Optik-International Journal for Light and Electron Optics, 2015, 127(4):1695-1702.
GAO Y, SHAO SH Y, FENG Q B.A novel method for automatically measuring wheel geometric parameters by laser scanning [J]. Chinese Journal of Lasers, 2013, 40(7):0708005. (in Chinese)
BI CH, FANG J G, LIU J L, et al..Calibration of beam direction of laser displacement sensor based on spherical target [J]. Opt. Precision Eng., 2015, 23(3):678-685. (in Chinese)
FOROOSH H, ZERUBIA J B, BERTHOD M. Extension of phase correlation to subpixel registration [J]. IEEE Transactions on Image Processing, 2002, 11(3):188-200.
SUN H, LI ZH Q, SUN L N, et al.. Sub-pixel registration of special and frequency domains for video sequences [J]. Chin. Opt., 2011, 4(2):154-160.(in Chinese)
LI CH, LIU SH CH, LIU P, et al.. Research of camera synchronous capture system under external trigger mode [J]. Journal of Test and Measurement Technology, 2014(4):339-344.(in Chinese)
FENG Y Q, WANG Q H, WANG SH J.Correction of long-period error for small photoelectric encoders [J]. Opt. Precision Eng., 2014, 22(9):2491-2497.(in Chinese)
FU D D, ZHOU SH G, XU Y, et al.. Point cloud fitting technology based on principal component analysis [J]. Engineering of Surveying and Mapping, 2014, 23(4):20-23.(in Chinese)
TIAN X, LI Q H. Fitting of spatial cylindrical surface based on 3D coordinate transformation [J]. Geotechnical Investigation & Surveying, 2014, 42(12):79-82.(in Chinese)