Solids or liquids characterization by pulse echo method
Article REF: R4043 V1

Solids or liquids characterization by pulse echo method

Authors : Didier LAUX, Franck AUGEREAU, Emmanuel Le CLEZIO, Gilles DESPAUX, Jean-Yves FERRANDIS, Eric ROSENKRANTZ

Publication date: August 10, 2018 | Lire en français

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Overview

ABSTRACT

In this article, an overview of the pulse echo method, widely used in the field of nondestructive evaluation for mechanical characterization of solids or liquids is presented. The basic principles and the waves used are also found in the medical field although in this case the ultrasonic transducer is a multi-element device. The method seems very simple because it is based on an elementary relation (distance = velocity x time), but its application sometimes needs specific skills. After a presentation of the single-element transducer and the commonly used conventional measuring benches, the most common experimental approaches are detailed and illustrated with various examples.

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AUTHORS

  • Didier LAUX: Doctor, senior lecturer, qualified to direct research - IES (Institut d'Électronique et des Systèmes, UMR CNRS 5214), University of Montpellier, France - 860, rue Saint Priest, bât 5, 34095 Montpellier, France - [email protected] - and in alphabetical order

  • Franck AUGEREAU: Doctor, Senior Lecturer - IES, University of Montpellier, CNRS, Montpellier, France

  • Emmanuel Le CLEZIO: Doctor, University Professor - IES, University of Montpellier, CNRS, Montpellier, France

  • Gilles DESPAUX: Doctor, University Professor - IES, University of Montpellier, CNRS, Montpellier, France

  • Jean-Yves FERRANDIS: Doctor, research engineer qualified to direct research - IES, University of Montpellier, CNRS, Montpellier, France

  • Eric ROSENKRANTZ: Doctor, Senior Lecturer - IES, University of Montpellier, CNRS, Montpellier, France

 INTRODUCTION

While the fundamental relationships governing the propagation of mechanical vibrations, and consequently ultrasound, have been established for over 200 years thanks to the work of d'Alembert and Lord Rayleigh, [AF3810][AF3812][AF3814] , applications only really took off after the First World War, taking advantage of the recent discovery of piezoelectricity by Pierre and Jacques Curie. Since then, ultrasonographic methods have continued to progress, and today form an integral part of non-destructive testing methods, for example in civil engineering to check buildings, measure flow rates, control tightening, assess residual stresses... [R1410][R2265][R4040][IN8] .

Thanks to the increasing performance of computers, microtechnologies and the advent of digital technology, it is now possible to produce multi-element ultrasound transducers

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KEYWORDS

Non-destructive testing   |   viscosity   |   solids   |   liquids   |   elastic moduli   |   pulse echo

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Pulse-echo characterization of solids and liquids

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