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Proceedings Paper

Double-pulse digital speckle pattern interferometry for vibration analysis
Author(s): Dazhi Zhang; Jingfeng Xue; Lu Chen; Juying Wen; Jingjing Wang
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Paper Abstract

The double-pulse Digital Speckle Pattern Interferometry (DSPI) in the laboratory is established. Two good performances have been achieved at the same time, which is uniform distribution of laser beam energy by space filter and recording two successive pictures by a CCD camera successfully. Then two-dimensional discrete orthogonal wavelet transform method is used for the process of filtering method. By using the DSPI, speckle pattern of a vibrated object is obtained with interval of (2~800)μs, and 3D plot of the transient vibration is achieved. Moreover, good agreements of the mode shapes and displacement are obtained by comparing with Laser Doppler Vibrometer (LDV) .

Paper Details

Date Published: 3 December 2014
PDF: 6 pages
Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 92971W (3 December 2014); doi: 10.1117/12.2073094
Show Author Affiliations
Dazhi Zhang, Changcheng Institute of Metrology & Measurement (China)
Jingfeng Xue, Changcheng Institute of Metrology & Measurement (China)
Lu Chen, Changcheng Institute of Metrology & Measurement (China)
Juying Wen, Changcheng Institute of Metrology & Measurement (China)
Jingjing Wang, Changcheng Institute of Metrology & Measurement (China)


Published in SPIE Proceedings Vol. 9297:
International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors
Jurgen Czarske; Shulian Zhang; David Sampson; Wei Wang; Yanbiao Liao, Editor(s)

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