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• W1969337826 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." @default.
• W1969337826 created "2016-06-24" @default.
• W1969337826 creator A5035199316 @default.
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• W1969337826 date "2013-01-31" @default.
• W1969337826 modified "2023-10-16" @default.
• W1969337826 title "Design of an optical ultrasonic signal testing system using LabVIEW" @default.
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• W1969337826 doi "https://doi.org/10.1117/12.2014831" @default.
• W1969337826 hasPublicationYear "2013" @default.
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