ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Digital image correlation method (DICM) is described as a robust in-plane deformationmeasuring method due to its simple optical setup and the insensitivity against ambient noise. Basedon DICM, digital speckle projection has been developed for shape measurement. This paperexplores 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 LCDprojector. Then the dynamic deformation modulated speckle images are captured by a high-speedCCD camera and saved in the computer. By using the self-developed temporal sequence digitalimages correlation algorithm, the deformation and vibration mode can be analyzed quantitatively.The proposed method avoids using stroboscopic or laser illumination and simplifies theexperimental setup for vibration measurement, while it is time-consuming thanks to calculating alarge amount of correlation coefficients. The experimental performance on a harmonic-vibratingcantilever beam well demonstrates the validity of the new method
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.99.pdf
