DEFORMATION MEASURING METHOD AND APPARATUS USING ELECTRONIC SPECKLE PATTERN INTERFEROMETRY

摘要

electronic speckle pattern interferometry for use in observation of objects dynamic deformation, vibration, distortion, such as a high-precision A method and apparatus for road measurements, when performing a phase unwrapping process of the phase-change curve in the time domain, and to have easier to the extent of automation for the detection of the connection points of the phase in the phase change curve. ; Made in calculating the cosine component of the intensity by subtracting the mean intensity from the intensity in a time domain of each point of the larger pattern image and 32, the Hilbert transform in time domain with respect to the cosine component and perform the process, calculating a sine component of the intensity (33), and the calculated cosine component, obtaining a ratio of the arc tangent of the sine calculated component, and the step 34 of determining the object phase, unwrapped operation and the process performing step (35), comprises a step (36) for outputting a three-dimensional deformation distribution data in a form that can be displayed.