Department of Engineering Mechanics, Southeast University, Nanjing,Jiangsu 210096 China. Application of Wavelet Transform for Analyzing Instantaneous Contour of Continual Deformation Object. 东南大学工程力学系 陈凡秀. Method of 3D profilometry. Moire topography:
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Department of Engineering Mechanics, Southeast University, Nanjing,Jiangsu 210096 China
Application of Wavelet Transform for Analyzing Instantaneous Contour of Continual Deformation Object
Proposed by Meadows and Takasaki in the early 1970’s
Inverse Fourier transform
Limited to surface contouring of static object only
The Fourier-transform method become a popular method
(Continuous wavelet transform, CWT)
h (x, y)
Fig. 1 Optical geometry
ζ=ω0 / a
Fig. 3 Experimental setup
Fig. 4 Typical moiré fringe patterns of cantilever beam
P= 5 lines/mm
Fig. 5 The instantaneous contour of T1=0.0025 s and T2=0.047 s.
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