DocumentCode :
2152951
Title :
Signal processing in attenuation measurement with laser ultrasonics
Author :
Qing-bang, Han ; Chang-ping, Zhu
Author_Institution :
Department of Computer and Engineering information, Hohai university, Changzhou 213002 China
fYear :
2010
fDate :
4-6 Dec. 2010
Firstpage :
4018
Lastpage :
4021
Abstract :
This research uses laser ultrasonics and signal processing to quantify the frequency-dependent attenuation losses of Rayleigh waves on viscoelastic materials. The high fidelity, large frequency bandwidth, steady output and non-contact nature of laser excitation makes this an ideal method to measure attenuation in these materials. Through the signal process of windows, filtering, FFT and coherent analysis to the Rayleigh signal, the relation between attenuation and frequency is obtained. The obtained results show that appropriate signal processing method is effective to the attenuation measurement with laser ultrasonics.
Keywords :
Acoustics; Attenuation; Attenuation measurement; Coherence; Geophysical measurements; Laser excitation; Surface waves; Rayleigh wave; attenuation; signal processing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Science and Engineering (ICISE), 2010 2nd International Conference on
Conference_Location :
Hangzhou, China
Print_ISBN :
978-1-4244-7616-9
Type :
conf
DOI :
10.1109/ICISE.2010.5691446
Filename :
5691446
Link To Document :
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