Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (1): 71-77.doi: 10.3969/j.issn.1000-565X.2016.01.011

• Mechanical Engineering • Previous Articles     Next Articles

A New Calibration Method for Line-Structured Light Vision Sensor Based on Linear Scale

KUANG Yong-cong CUI Liang-chun   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2015-06-08 Revised:2015-08-11 Online:2016-01-25 Published:2015-12-09
  • Contact: 邝泳聪( 1970-) ，男，博士，副教授，主要从事机器视觉、精密制造等研究． E-mail:2212910783@qq.com;kuangyongcong@126.com
  • About author:邝泳聪( 1970-) ，男，博士，副教授，主要从事机器视觉、精密制造等研究．
  • Supported by:
    Supported by the National High-tech R&D Program of China ( 863 Program) ( 2012AA050302) and the Guangdong & Hongkong Priority Breakthrough Program in Key Areas( Dongguan2012205122)

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Abstract: In order to realize a simple,rapid and high accuracy calibration of line-structured light vision sensors,a new direct calibration method of line-structured light vision sensors on the basis of linear scale is proposed,and a planar target and an extraction algorithm of feature point are designed.In the method,by achieving the image coordinates of feature points in the known 3-D coordinates,a subpixel index table is established,and direct calibration of system is realized.The results of calibration and measurement experiments demonstrate that the new calibration method is simple to operation and easy to implement,and is of a high accuracy,specifically,its average measurement error is 0.0045mm in Z axis and 0.0130mm in X axis,Overall,the new method can meet the requirements of industrial production and measurement.

Key words: line-structured light, vision sensor, calibration, feature point extraction, 3-D measurement

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