Nonlinear behavior of an ultrasonic transducer

A transducer model, based on nonlinear piezoelectric constitutive equations, has been developed to describe the harmonic generation that occurs on current or velocity signal analysis when the transducer is driven at high voltage. The symmetrical Langevin transducer studied close to its resonance fre...

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Bibliographic Details
Published inUltrasonics Vol. 34; no. 2; pp. 187 - 191
Main Authors Aurelle, N., Guyomar, D., Richard, C., Gonnard, P., Eyraud, L.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.06.1996
Elsevier Science
Subjects
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinearities
Physics
PZT
Transducers
Transduction; acoustical devices for the generation and reproduction of sound
Transducers
Nonlinearities
PZT
Constitutive equation
Numerical method
Non linear effect
Experimental study
Ultrasonic transducer
Piezoelectric ceramics
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Summary:A transducer model, based on nonlinear piezoelectric constitutive equations, has been developed to describe the harmonic generation that occurs on current or velocity signal analysis when the transducer is driven at high voltage. The symmetrical Langevin transducer studied close to its resonance frequency is composed of Navy III type power ceramics. The nonlinearities create an energy spread over the frequency spectrum and consequently result in an amplitude saturation effect at the driving frequency, which can be interpreted in terms of the loss mechanism. Experiments have been carried out to measure the nonlinear losses and the harmonic amplitude evolutions. Results are given and discussed. Eventually, by experimental means, identification of the influential nonlinear coefficients permits comparison between theoretical predictions and experimental results.
ISSN:0041-624X
1874-9968
DOI:10.1016/0041-624X(95)00077-G