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20 May 2009 Dynamic deformation measurement based on inverse projected fringe technique
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Abstract
In this paper a method for measurement and analysis of dynamic deformation based on inverse projected fringe technique is presented. This technique is also based on fringe projection but uses an active fringe control. The inverse fringe pattern is projected onto the surface of a vibrating membrane and a high-speed CCD camera is used to record the deformed fringe patterns on the membrane. On the recording plan, only the fringes at the deformed area will be curved while fringes in the other areas remains straight and the deformation of the measured object become much obvious. The shape and movement of the deforming object can be qualitatively analyzed and recognized by Fourier transform, filtering and inverse Fourier transform. The movement of a vibrating membrane and a deforming lap are calculated and evaluated. The results demonstrate this method is feasible and accurate to analyze dynamic deformation.
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Wen Li, Qican Zhang, and Yuankun Liu "Dynamic deformation measurement based on inverse projected fringe technique", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 728317 (20 May 2009); https://doi.org/10.1117/12.828657
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