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An Algorithm for Adjusting Inserting Position and Traveling Direction of a Go-No Gauge Inspecting Eggcrate Assemblies

에그크레이트 검사를 위한 Go-No 게이지의 삽입위치 및 이동방향 보정 알고리즘

  • 이문규 (계명대학교 기계 자동차공학부 산업공학전공) ;
  • 김채수 (서울사이버대학교 경상학부 e-Biz 전공)
  • Published : 2003.02.01

Abstract

A machine-vision guided inspection system with go-no gauges for inspecting eggcrate assemblies in steam generators is considered. To locate the gauge at the right place, periodic corrective actions for its position and traveling direction are required. We present a machine vision algorithm for determining inserting position and traveling direction of the go-no gauge. The overall procedure of the algorithm is composed of camera calibration, eggcrate image preprocessing, grid-height adjustment, intersection point estimation between two intersecting grids, and adjustment of position and traveling direction of the gauge. The intersection point estimation is performed by using linear regression with a constraint. A test with a real eggcrate specimen shows the feasibility of the algorithm.

Keywords

References

  1. 김채수, 김우성, 황학, 이문규, '에그크레이트(Eggcrate) 격자(Grid)의 내접원 직경 측정을 위한 머신비젼 알고리즘,' 한국정밀공학회지, 제17권, 제4호, pp. 85-96, 2000
  2. 이정화, 이문규, '악조건하의 카메라 교정을 위한 알고리즘,' 한국정밀공학회지, 제16권, 제2호, pp. 164-175, 1999
  3. R. Y. Tsai, 'A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses,' IEEE Journal of Robotics and Automation, vol. RA-3, no. 4, pp. 323-344, 1987
  4. R. C. Gonzalez and R. E. Woods, Digital Image Processing, Addison Wesley, USA, 1992
  5. W. H. Beyer, CRC Standard Mathematical Tables, CRC Press, USA, 1978