Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Correction of Position Error Using Modified Hough Transformation For Inspection System with Low Precision X- Y Robot

저정밀 X-Y 로봇을 이용한 검사 시스템의 변형된 Hough 변환을 이용한 위치오차보정

  • 최경진 (경희대학교 전자공학과) ;
  • 이용현 (강남대학교 지식정보공학부) ;
  • 박종국 (경희대학교 전자공학과)
  • Published : 2003.10.01
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Abstract

The important factors that cause position error in X-Y robot are inertial force, frictions and spring distortion in screw or coupling. We have to estimate these factors precisely to correct position errors, Which is very difficult. In this paper, we makes systems to inspect metal stencil which is used to print solder paste on pads of SMD of PCB with low precision X-Y robot and vision system. To correct position error that is caused by low precision X-Y robot, we defines position error vector that is formed with position of objects that exist in reference and camera image. We apply MHT(Modified Hough Transformation) for the aim of determining the dominant position error vector. We modify reference image using extracted dominant position error vector and obtain reference image that is the same with camera image. Effectiveness and performance of this method are verified by simulation and experiment.

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References

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