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Titolo:
OBSERVATION OF V(Z) CURVES WITH MULTIPLE ECHOES
Autore:
DUQUENNOY M; OURAK M; XU WJ; NONGAILLARD B; OUAFTOUH M;
Indirizzi:
UNIV VALENCIA,OPTOACOUSTOELECTR LAB,CNRS,URA 832,BP 311 F-59304 VALENCIENNES FRANCE
Titolo Testata:
NDT & E international
fascicolo: 3, volume: 28, anno: 1995,
pagine: 147 - 153
SICI:
0963-8695(1995)28:3<147:OOVCWM>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACOUSTIC MICROSCOPY; REFLECTION;
Keywords:
ACOUSTIC MATERIAL SIGNATURE; SURFACE WAVE; MULTIPLE ECHOES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
M. Duquennoy et al., "OBSERVATION OF V(Z) CURVES WITH MULTIPLE ECHOES", NDT & E international, 28(3), 1995, pp. 147-153

Abstract

Until now the acoustic material signature technique (AMS) has largelybeen described and used in the high frequency area (100 MHz to 2 GHz). Today more and more industries are interested in this method. However, many observed samples show structures calling for the use of low frequencies (a few MHz). In the classical AMS method, where only the first reflected echo (one round trip in the water coupling medium) is considered, the contrast of the V(z) curves is sometimes very poor. In this paper an original method is reported that uses the information carried by the second reflected echo and makes it possible in various circumstances to significantly increase the contrast in the V(z) curves.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:36:08