Paper Title:
Digital Speckle Projection for Vibration Measurement by Applying Digital Image Correlation Method
  Abstract

Digital image correlation method (DICM) is described as a robust in-plane deformation measuring method due to its simple optical setup and the insensitivity against ambient noise. Based on DICM, digital speckle projection has been developed for shape measurement. This paper explores the possibilities for vibration analysis using digital speckle projection together with DICM. A digital speckle pattern, generated by computer, is projected on an object surface using an LCD projector. Then the dynamic deformation modulated speckle images are captured by a high-speed CCD camera and saved in the computer. By using the self-developed temporal sequence digital images correlation algorithm, the deformation and vibration mode can be analyzed quantitatively. The proposed method avoids using stroboscopic or laser illumination and simplifies the experimental setup for vibration measurement, while it is time-consuming thanks to calculating a large amount of correlation coefficients. The experimental performance on a harmonic-vibrating cantilever beam well demonstrates the validity of the new method.

  Info
Periodical
Key Engineering Materials (Volumes 326-328)
Edited by
Soon-Bok Lee and Yun-Jae Kim
Pages
99-102
DOI
10.4028/www.scientific.net/KEM.326-328.99
Citation
F. J. Yang, X. Y. He, "Digital Speckle Projection for Vibration Measurement by Applying Digital Image Correlation Method", Key Engineering Materials, Vols. 326-328, pp. 99-102, 2006
Online since
December 2006
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Price
$32.00
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