Parameter estimation for wavelet transformed ultrasonic signals

Cited 6 time in webofscience Cited 0 time in scopus
  • Hit : 268
  • Download : 0
In this paper we first present a closed-form analytical solution for Wavelet transformed ultrasonic signals which can be utilized for non-destructive evaluation A family of wavelet transformed multiple echo ultrasonic signals is parameterized in terms of the closed-form solutions For the given noisy version of wavelet transformed multiple echoes the separable nonlinear least squares (SNLS) technique is applied to estimate the associated unknown parameters For an Illustrated example the Cramer-Rao lower bound (CRLB) of the covariance matrix of the estimated parameters is calculated and compared to the covariance matrix generated by Monte Carlo simulations The proposed method is applied to two illustrative examples and to actual ultrasonic A-scan data from water-Immersion tests to demonstrate its usefulness as an effective non-destructive evaluation technique (C) 2010 Elsevier Ltd All rights reserved
Publisher
ELSEVIER SCI LTD
Issue Date
2011-01
Language
English
Article Type
Article
Keywords

MODEL-BASED ESTIMATION; DAMAGE ASSESSMENT; ECHO TEST; RECONSTRUCTION; DECOMPOSITION; FOURIER; NDE

Citation

NDT E INTERNATIONAL, v.44, no.1, pp.32 - 40

ISSN
0963-8695
DOI
10.1016/j.ndteint.2010.09.003
URI
http://hdl.handle.net/10203/104144
Appears in Collection
CE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 6 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0