A block diagram model of the thickness mode piezoelectric transducer containing dual oppositely polarized piezoelectric zones

A unidimensional, linear systems, block diagram model of a two-layer thickness mode piezoelectric transducer is presented. The layers are subject to opposing piezoelectric polarization and the device is assumed to be loaded by semi-infinite isotropic media at the two principal faces. Block diagram r...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 53; no. 5; pp. 1028 - 1036
Main Authors: Estanbouli, Y., Hayward, G., Ramadas, N., Barbenel, J.C.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.05.2006
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Acoustics
Admittance
Bandwidth
Block diagrams
Boundaries
Damping
Devices
Exact sciences and technology
Finite element analysis
Finite element methods
Frequency
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Linear systems
Mathematical models
Physics
Piezoelectric polarization
Piezoelectric transducers
Piezoelectricity
Studies
Transducers
Ultrasonic imaging
Ultrasonic transducers
Ultrasonics, quantum acoustics, and physical effects of sound
Electroacoustic transducer
Polarization
Isotropic medium
Function block diagram
Piezoelectric sensor
Experimental study
Block diagram
Layer thickness
Electrical model
Modeling
ISSN:0885-3010, 1525-8955
Online Access:Get full text
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Description
Summary:A unidimensional, linear systems, block diagram model of a two-layer thickness mode piezoelectric transducer is presented. The layers are subject to opposing piezoelectric polarization and the device is assumed to be loaded by semi-infinite isotropic media at the two principal faces. Block diagram representations of the transducer acting as both a generator and a receiver of ultrasound are developed in conjunction with the equivalent model of the electrical admittance. When expressed in this manner, the underlying cause and effect relationships are identified, with the important contribution of the piezoelectric boundary highlighted. Comparisons with the conventional single-layer transducer are made throughout and the major physical differences in terms of transduction performance are discussed. The new model is compared with finite element analysis and good agreement is also demonstrated with experimental data. A key aspect of the methodology is the provision of a more intuitive understanding of such device behavior. Accordingly, emphasis has been placed on the physical relationships and this is considered a major contribution of the work
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ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2006.1632692