Design of an optical ultrasonic signal testing system using LabVIEW

Yukun Luo; Shitu Luo; Feilu Luo; Mengchun Pan; Xianglin Tan

doi:10.1117/12.2014831

31 January 2013 Design of an optical ultrasonic signal testing system using LabVIEW

Yukun Luo, Shitu Luo, Feilu Luo, Mengchun Pan, Xianglin Tan

Proceedings Volume 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation; 87593W (2013) https://doi.org/10.1117/12.2014831
Event: International Symposium on Precision Engineering Measurement and Instrumentation 2012, 2012, Chengdu, China

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.

Citation Download Citation

Yukun Luo, Shitu Luo, Feilu Luo, Mengchun Pan, and Xianglin Tan "Design of an optical ultrasonic signal testing system using LabVIEW", Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 87593W (31 January 2013); https://doi.org/10.1117/12.2014831

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