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Small Displacement Measurement by Holographic Interferometry

홀로그래피 간섭계를 이용한 미소변위 측정

  • 이해중 (포항공대 기계공학과 대학원) ;
  • 황운봉 (포항공대 기계공학과) ;
  • 박현철 (포항공대 기계공학과)
  • Published : 1992.05.01

Abstract

Two double-exposure holograms are made in the different view angle at the same time, using laser, by overlapping before and after the static deformation. These images are transfered to the computer. The fringe patterns of holograms are recognized by image processing and each component of the displacement and strain at each point of the specimen is obtained by vector analysis, and the results were presented in the graphical form. For the verification of all the ment process, the two experimental cases, the in-plane displacement by tension load and the out-of-plane displacement by bending load, are measured. These results are compared with the exact solution.