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GAO Shi-yi, YANG Yong-qiang, Yang Kai-zhen. Defect detection of laser welding seam of unequal-thickness blank based on structured light vision[J]. LASER TECHNOLOGY, 2011, 35(4): 440-443. DOI: 10.3969/j.issn.1001-3806.2011.04.002
Citation: GAO Shi-yi, YANG Yong-qiang, Yang Kai-zhen. Defect detection of laser welding seam of unequal-thickness blank based on structured light vision[J]. LASER TECHNOLOGY, 2011, 35(4): 440-443. DOI: 10.3969/j.issn.1001-3806.2011.04.002

Defect detection of laser welding seam of unequal-thickness blank based on structured light vision

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  • Received Date: December 02, 2010
  • Revised Date: February 24, 2011
  • Published Date: July 24, 2011
  • In order to detect the laser welding seam surface defects of unequal-thickness steel blank,the structured light active vision method and Gaussian data fitting technology were used for the experiment research of the seam surface defects detection.Firstly,the laser strip center line in sub-pixel accuracy was extracted by Gaussian fitting.Secondly,the seam endpoint positions were obtained by line fitting and computing point of intersections of three lines.Thirdly,the computing methods of the surface defects of the laser welding seam,such as concavity,convexity,were put forward.The experiment result shows that the proposed method is based on structured light vision and data fitting is suit for laser welding seam detection of unequal-thickness steel blanks.
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