吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (2): 524-529.doi: 10.13229/j.cnki.jdxbgxb201702025

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New method of cylindricity measurement based on structured light vision technology

ZHOU Xiao-dong1, 2, ZHANG Ya-chao1, TAN Qing-chang1, ZHANG Wei-jun3   

  1. 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China;
    2.School of Mechatronic Engineering, Changchun University of Technology,Changchun 130012,China;
    3.Aircarft Dynamic Department,Aviation University of Air Force,Changchun 130022,China
  • Received:2016-08-29 Online:2017-03-20 Published:2017-03-20

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Abstract: In the measurement of cylindricity errors of shaft parts using machine vision technology, severely distorted fishy lens will influenced the precision. To overcome this problem, a new method is proposed based on structured light vision technology. In this method, the projected structure light is approximate parallel to the direction of the measured axis. The field of view is divided into multi-regions according to the characteristics of the shaft elements and the distribution of the lens distortion, then multi-regions calibration is carried out. The multi-calibration model, the data extraction and data processing methods are given. The feasibility and accuracy of the proposed method are verified by measuring a standard shaft. Results show that the measuring accuracy of a shaft, diameter of 27.68 mm and length of 300 mm, is 20 μm. The method not only satisfies the sampling requirements of geometrical specification, but also has the advantages of non-contact, high efficiency and online measurement, which provides reliable data for cylindricity evaluation.

Key words: computer application, machine vision, cylindricity, structured light vision, multi-regions calibration, distortion

CLC Number: 

  • TH115
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