Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

A Study on the Improvement of Accuracy and Precision in the Vision-Based Surface-Strain Measurement

비전을 이용한 곡면변형률 측정의 정확도 및 정밀도 향상에 관한 연구

  • Published : 1999.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

A vision-based surface-strain measurement system has been still improved since the authors devel-oped the first version of it. New algorithms for the subpixel measurement and surface smoothing are introduced to improve the accuracy and precision in the present study. The effects of these algorithms are investigated by error analysis. And the equations required to calculate 3D surface-strain of a shell element are derived from the shape function of a linear solid finite-element. The influences of external factors on the measurement error are also examined, and several trials are made to obtain possible optimal condition which may minimize the error.

Keywords

References

  1. J. of Applied Metalworking v.4 The Evaluation of Large Strains from Industrial Sheet Metal Stampings with a Square Grid E.Schedin;A.Melander
  2. Proc. of the 13th Bienniel Congress Optimizing Patterns and Computational Algorithms for Automated, Optical Strain Measurement in Sheet Metal D.N.Harvey
  3. Engineerings with Computers v.3 Strain Measurement of Structures with Curved Surfaces by Means of Personal Computer-Based Picture Processing A.Miyoshi;A.Yoshioka;G.Yagawa
  4. J. of Materials Shaping Technology v.6 no.4 An Automated Two-View Method for Determining Strain Distributions on Deformed Surfaces J.H.Vogel;D.Lee
  5. ASAME Reference Manual(Ver.3.8.) CamSys Inc.
  6. JOM v.47 no.7 Recent Developments in a Vision-Based Surface Strain Measurement System D.Manthey;D.Lee
  7. Proceedings of the 3rd NUMISHEET Conference Further Development of Experimental Methods to Verify Computer Simulations H.J.Kim;D.Lee
  8. 한국소성가공학회논문집 v.7 no.6 화상처리법을 이용한 곡면변형률 측정 시스템의 개발 한상준;김영수;김형종;오수익
  9. 한국소성가공학회 '97추계학술대회 논문집 화상처리법을 이용한 판재의 변형률 측정(II) 정재윤;황창원;허만성;김낙수
  10. Pattern Recognition v.16 no.4 Subpixel Edge Estimation P.D.Hyde;L.S.Davis
  11. IEEE Trans. on Pattern Analysis and Machine Intelligence v.11 no.12 Subpixel Measurement Using a Moment-Based Edge Operator E.P.Lyvers;O.R.Mitchell;M.L.Akey;A.P.Reeves
  12. Computer and Robot Vision R.M.Haralick;L.G.Shapiro
  13. Int. J. Mech. Sci. v.28 no.7 The Modelling of Sheet Metal Stamping R.Sowerby;J.L.Duncan;E.Chu
  14. IEEE J. of Robotics and Automation v.RA-3 no.4 A Versatile Camera Calibration Technique for High-Accuracy 3D Machine Vision Metrology Using Off-the-Shelf TV Cameras and Lenses R.Y.Tsai
  15. 박판금속의 성형 전기찬