Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Evaluation of Displacement Measurement Technique Using Laser Speckle and Digital Image Correlation Method

레이저 스페클과 디지털 화상관련법을 이용한 변위 측정방법의 평가

  • 강기주 (전남대학교 기계시스템 공학부) ;
  • 이정현 (전남대학교 대학원) ;
  • 전문창 (전남대학교 대학원)
  • Published : 2003.06.01
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Abstract

As a tool for strain measurement to work with screw driven or hydraulic material test systems, in which mechanical vibration is inherent, SSDG (Speckle Strain/Displacement Gage), ESP (Electronic Speckle Photography) and its 3-dimension version SDSP are evaluated for the theory and practical appliance. Through tension test of steel strips, their validity and shortcomings are examined. As the results, it has been shown that, although SSDG and ESP provide direct measurement of in-plane strain in one direction, they are so sensitive to the out-plane displacement. On the other hand, SDSP which is aided with DIC (Digital Image Correlation) technique to trace the movement of the speckles provides not only in-plane 2-dimensional displacement field, but also out-of-plane displacement simultaneously. However, because the DIC is time-consuming, not automated yet and it needs post-processing to evaluate strain from the displacement field, SDSP appears to be not adequate as a real time sensor.

Keywords

References

  1. Tyrer, J. R., 'Critical Review of Resent Development in Electronic Speckle Pattern Interferometry,' Holographic Nondestructive Testing Proc. SPIE, Vol. 604, pp. 55-111, 1986
  2. Vest, C. M., Holographic Interferometry, John Willey & Sons Press, pp. 146-245, 1979
  3. Kim, I. K., 'A Study on Vibration Characteristic of Thin Plate in Crack Propagation by Laser Holography Method,' J. of the KSPE, Vol. 17, No. 10, pp. 200-205, 2000
  4. Jia, Z. and Shah, S. P., 'Crack Detection in Concrete Using Real-Time ESPI Technology,' SPIE, Vol. 2455, pp. 385-391, 1995 https://doi.org/10.1117/12.213554
  5. Jia, Z. and Shah, S. P., 'Two-dimensional Electonic-Speckle-Pattern Interferometry and Concrete-Fracture Processes,' Experimental Mechanics, Vol. 34, No. 3, pp. 262-270, 1994 https://doi.org/10.1007/BF02319764
  6. Jang, S. S., 'A Study on the Development of Image Processing Measurement System for Structural Analysis by Optical Non-contact Measurement,' J. of the KSPE, Vol. 18, No. 7, pp. 149-154, 2001
  7. Her, Y. H., 'Measurement of Micro-Tensile Properties using ESPI technique,' J. of the KSPE, Vol. 18, No. 5, pp. 90-97, 2001
  8. Kim, D. H., 'Speckle Interferometric Detection of Defects on the backside of steel plate,' KSPE, pp. 195-198, 2001
  9. Back, T. H., 'Measurement of Out-of plane Displacement in a Spot Welded Canti-levered plate using Laser Speckle interferometry with 4-step Phase shifting Technique,' J. of the KSPE, Vol. 19, No. 3, pp. 66-72, 2002
  10. William, N., Sharpe, Jr., 'Applications of the Interferometric Strain/Displacement Gauge,' Optical Engineering, Vol. 21, No. 3, pp. 483-488, 1982
  11. Yamaguchi, I., 'A Laser-Speckle Strain Gauge,' J. Phys. E: Sci. Instrum., Vol. 14, pp. 1270-1273, 1981 https://doi.org/10.1088/0022-3735/14/11/012
  12. Noh, S. and Yamaguchi, I., 'Two-Dimensional Measurement of Strain Distribution by Speckle Correlation,' Jpn. J. Appl. Phys., Vol. 31, pp. L1299-L1301, 1992 https://doi.org/10.1143/JJAP.31.L1299
  13. Ogura, K. and Nishikawa, I., 'Laser Speckle Strain/Displacement Gauge and its application to Fracture problems of ceramics and ceramic coating,' Pro. of APCFS'96 Korea, pp. 749-754, 1996
  14. Johnson, P., 'Strain field measurements with dualbeam digital speckle photography,' 1998
  15. Sjodahl, M., 'Electronic speckle photography: increased accuracy by nonintegral pixel shifting,' Applied Optics, Vol. 33, No. 28, pp. 6667-6673, 1994 https://doi.org/10.1364/AO.33.006667
  16. Sjodahl, M., 'Electronic speckle photography: measurement of in-plane strain fields through the used of deforcused laser speckle,' Applied Optics, Vol. 34, No. 25, pp. 5799-5808, 1995 https://doi.org/10.1364/AO.34.005799
  17. Sutton, M. A., Wolters, W. J., Peters, W. H., Ranson, W. F. and McNeil, S. R., 'Determination of displacements using an improved digital correlation methods,' Image Vision Comp., Vol. 1, No. 3, pp. 133-139, 1983 https://doi.org/10.1016/0262-8856(83)90064-1
  18. Chu, T. C., Ranson, W. F., Sutton and M. A. and Peters, W. H., 'Applications of digital-image-correlation techniques to experimental mechanics,' Exp. Mech., Vol. 25, pp. 232-244, 1985 https://doi.org/10.1007/BF02325092
  19. Synnergreu, P. & Sjodahl, M., 'A stereoscopic digital speckle photography system for 3-D displ. Field measurements,' Optics and Lasers in Engineering, Vol. 31, pp. 425-443, 1999 https://doi.org/10.1016/S0143-8166(99)00040-8
  20. Lee, S. S., 'Laser Speckle and Holograpy,' Kye-Hak Press, 1987