Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (3): 78-83.doi: 10.3969/j.issn.1000-565X.2014.03.013

• Mechanical Engineering • Previous Articles     Next Articles

Variable- Step Corner Detection Algorithm for Fillet Weld Tracking of Corrugated Plate

Shi Yong- hua Wang Xiao- jia Li Xue- rui   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-11-14 Revised:2013-12-31 Online:2014-03-25 Published:2014-02-19
  • Contact: 石永华(1973-)，男，博士，教授，主要从事焊接及其自动化研究． E-mail:yhuashi@scut.edu.cn
  • About author:石永华(1973-)，男，博士，教授，主要从事焊接及其自动化研究．
  • Supported by:

    国家自然科学基金资助项目(51374111， 51175185);海军装备部科研项目

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Abstract:

Proposed in this paper is a variable- step corner detection algorithm for the laser binocular vision detec-tion of fillet weld position of the T- type joint between corrugated plate and box girder.In this algorithm,a binocularvision detection model of fillet weld position is established and an image preprocessing is performed for the laserstripe images according to the imaging characteristics of the stripe projected on the fillet weld.Then,a variable-step searching algorithm is developed to find the near- corner point in the laser stripe,and several pixels at bothsides of the near- corner point are selected to construct two straight lines.Finally,the corner point of the fillet weldis determined according to the intersection point of the two constructed lines.Experimental results show that theproposed algorithm is superior to those traditional ones due to its high reliability,low detection error (less than0. 1mm) and low 3D trajectory reconstruction error of fillet weld (less than 1mm).

Key words: weld seam tracking, binocular vision, image processing, corner detection

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