Simultaneous measurement of speed, attenuation, thickness and density with reflected ultrasonic waves in plates

Author

Graciet, Christophe ; Hosten, Bernard

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

1219

Abstract

This paper presents a method to measure simultaneously the velocity and the attenuation of ultrasonic waves, the density and the thickness of the sample. Velocity and thickness are deduced from time-of-flight. The Fourier transform of all acquired ultrasonic echoes furnishes the experimental transfer function. This is combined with the expression of plate reflection coefficient to build a form of which the minimum corresponds to the best estimate of density and longitudinal wave attenuation. Results are obtained for epoxy matrix reinforced by long glass fibers composite materials

Keywords

acoustic signal processing; density measurement; echo; glass fibre reinforced plastics; thickness measurement; ultrasonic absorption; ultrasonic materials testing; ultrasonic reflection; ultrasonic velocity measurement; Fourier transform; composite materials; density measurement; epoxy matrix reinforced glass fibers; longitudinal wave attenuation; plate reflection coefficient; plates; reflected ultrasonic waves; thickness measurement; time-of-flight; transfer function; ultrasonic attenuation measurement; ultrasonic echoes; ultrasonic velocity measurement; Acoustic beams; Acoustic reflection; Acoustic signal analysis; Acoustic testing; Acoustic velocity measurement; Density measurement; Echo interference; Nondestructive testing; Nonhomogeneous media; Plates; Thickness measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401805

Filename

401805