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Proceedings Paper

Design of an optical ultrasonic signal testing system using LabVIEW
Author(s): Yukun Luo; Shitu Luo; Feilu Luo; Mengchun Pan; Xianglin Tan
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Paper Abstract

Optical methods are used in ultrasonic testing to overcome the limitation of conventional contact transducers in bad situations and have become a hot branch in ultrasonic testing methods. However, the sensitivity in optical methods is lower than that of contact transducers and the use of laser devices brings more noises, which make the signal to be tested more complex. In view of the characteristics of the signal in optical testing, wavelet transform and complex analytic wavelet envelope detection are introduced to extract the signal and its features. Then an optical ultrasonic signal testing virtual instrument system based on LabVIEW is designed, integrating signal acquisition, digital filtering, noise suppression, power spectrum analysis, peak extraction and envelope detection as a whole. Compared with those heavy and expensive equipments, the friendly interface, convenient operation and high extendibility prove its flexibility and value. Finally, experiments are carried out to verify the reliability and precision of the system. Results show a relatively error below 1% in multiple measures.

Paper Details

Date Published: 31 January 2013
PDF: 8 pages
Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 87593W (31 January 2013); doi: 10.1117/12.2014831
Show Author Affiliations
Yukun Luo, National Univ. of Defense Technology (China)
Shitu Luo, National Univ. of Defense Technology (China)
Feilu Luo, National Univ. of Defense Technology (China)
Mengchun Pan, National Univ. of Defense Technology (China)
Xianglin Tan, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 8759:
Eighth International Symposium on Precision Engineering Measurement and Instrumentation
Jie Lin, Editor(s)

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