Work

Traducteurs ultrasonores large-bande à profil vibratoire non uniforme. Théorie et expériences

Year: 1994

Type: article

Abstract: This paper follows a strictly theoretical one presented in the previous CFA [1]. We had shown the advantage of using nonuniformly excited transducers in wideband pulse-echo method for nondestructive tetsing. We can now produce the source (and sensitivity) profile we want by a masking method not detailed herein. We limit the study to planar disc transducers. The transient field radiated by a planar transducer vibrating with a conventional uniform profile is often described as a superposition of a plane wave and edge (diffracted) waves. We consider three different profiles : uniform profile, profile favoring the plane wave component and another favoring the edge wave. We first compare theoretical with measured echo-responses from simple-shaped targets proving the validity of the masking technique. Then, practical transducers are studied in terms of their axial or radial resolution and sensitivity.

Source: Journal de Physique IV (Proceedings)

DOI: 10.1051/jp4:19945263

Authors: A. LHÉMERY, D. DE VADDER, S. DIMITRIU

Institutions: Centre National de la Recherche Scientifique, École Centrale Paris

Language: French

Topic: Ultrasonics and Acoustic Wave Propagation

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1973040586

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