Title :
The detection of echoes from multilayer structures using the wavelet transform
Author :
Angrisani, Leopoldo ; Daponte, Pasquale ; D´Apuzzo, Massimo
Author_Institution :
Dipt. di Inf. e Sistemistica, Naples Univ., Italy
fDate :
8/1/2000 12:00:00 AM
Abstract :
A method for measuring unknown thicknesses of multilayer structures, based on echo detection by means of the wavelet transform (WT), is presented. A brief discussion of the theoretical considerations underlying the method is first given. This highlights the excellent performance shown by the WT as a powerful tool for the analysis of echoes in a noisy environment. A suitable operating procedure for validation of the method is then set up. To this end, tests on 1) simulated signals and 2) actual signals received from known thicknesses are carried out: the obtained results are finally given and discussed
Keywords :
echo; thickness measurement; ultrasonic applications; wavelet transforms; detection of echoes; echo detection; multilayer structures; noisy environment; simulated signals; thicknesses measurement; ultrasonics; wavelet transform; Attenuation; Biomedical measurements; Frequency; Nonhomogeneous media; Signal analysis; Signal resolution; Testing; Thickness measurement; Ultrasonic variables measurement; Wavelet transforms;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
