DocumentCode :
76527
Title :
Compensation method of propagating distance for guided wave
Author :
Xiaofeng Liu ; Lin Bo ; Hongling Luo ; Libin Fu
Author_Institution :
State Key Lab. of Mech. Transm., Chongqing Univ., Chongqing, China
Volume :
9
Issue :
1
fYear :
2015
fDate :
1 2015
Firstpage :
93
Lastpage :
101
Abstract :
Guided wave has been utilised in various manners for non-destructive evaluation and testing. The dispersion and attenuation characteristics of guided wave restrict and complicate the accurate estimation of echo propagation distance. The study focuses on how to reduce the estimation error of propagation distance caused by these characteristics. The propagation of guided wave with attenuation and dispersion characteristics is analytically modelled in general cases. The flight-time compensation technique is developed based on the analytical model of wave propagation and the algorithm of chirplet matching pursuit. Numerical simulations are given to verify the efficacy of the developed compensation method. Finally, this study demonstrates the use of experimentally measured data for echoes identification and propagation distance estimation.
Keywords :
distance measurement; echo; error compensation; iterative methods; measurement errors; time-frequency analysis; ultrasonic absorption; ultrasonic dispersion; ultrasonic materials testing; ultrasonic propagation; Chirplet matching pursuit; attenuation characteristics; dispersion characteristics; echo identification; echo propagation distance estimation; estimation error reduction; flight time compensation technique; guided wave propagation; nondestructive evaluation; nondestructive testing; numerical simulation; propagating distance compensation method;
fLanguage :
English
Journal_Title :
Science, Measurement & Technology, IET
Publisher :
iet
ISSN :
1751-8822
Type :
jour
DOI :
10.1049/iet-smt.2014.0062
Filename :
7047371
Link To Document :
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