Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Vision Sensor System for Weld Seam Tracking of I-Butt Joint with Height Variation

높이 변화가 있는 막대기 용접선 추적용 시각센서

  • Kim Moo-Yeon (Graduate School of Mechanical Engineering, Yeungnam University) ;
  • Kim Jae-Woong (School of Mechanical Engineering, Yeungnam University)
  • 김무연 (영남대학교 대학원 기계공학과) ;
  • 김재웅 (영남대학교 기계공학부)
  • Published : 2004.12.01
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Abstract

In this study, a visual sensor system which can detect I-butt weld joint with height variation and includes a seam tracking algorithm was investigated. Three-dimensional position of an object can be acquired by using the method of distance measurement, i.e., an optical trigonometry which results from the spatial relations between the camera, the object and the structured light by a visible laser. Effects of laser intensity and iris number for the image quality as well as object material were investigated for the optical system design. For the image processing, a region of interest is defined from the whole image and a line image of laser is drew by using the gray level difference in the image. From the drew laser line, the weld joint can be recognized in searching the biggest point position calculated from the central difference method. Through a series of welding experiments, a good tracking performance was confirmed under GMA welding.

Keywords

References

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