Numerical Simulation and Experimental Verification of Electric–Acoustic Conversion Property of Tangentially Polarized Thin Cylindrical Transducer

In solving piezoelectric equations of motion, we established an electric–acoustic equivalent circuit of tangentially polarized thin cylindrical transducers and derived analytical expressions of the electric-acoustic response from the harmonic driving-voltage excitation. To experimentally verify the...

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Bibliographic Details
Published in:	Micromachines (Basel) Vol. 12; no. 11; p. 1333
Main Authors:	Fa, Lin, Kong, Lianlian, Gong, Hong, Li, Chuanwei, Li, Lili, Guo, Tuo, Bai, Jurong, Zhao, Meishan
Format:	Journal Article
Language:	English
Published:	Basel MDPI AG 30-10-2021 MDPI
Subjects:	Acoustic noise Acoustic properties Acoustics Conversion Damping Efficiency Electric potential electric–acoustic impulse response Equations of motion Equivalent circuits Impulse response Metal fatigue parallel electric–acoustic transmission network Physical properties Piezoelectricity polarization in tangential direction Resonant frequencies Shear stress Signal processing Signal to noise ratio Sound transmission thin cylindrical piezoelectric transducer Transducers Voltage
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Summary:	In solving piezoelectric equations of motion, we established an electric–acoustic equivalent circuit of tangentially polarized thin cylindrical transducers and derived analytical expressions of the electric-acoustic response from the harmonic driving-voltage excitation. To experimentally verify the findings, we manufactured a parallel electric-acoustic transmission network for transducers excited by multifrequency driving signals. We found that the tangentially polarized thin cylindrical transducers achieved a much higher electric-acoustic conversion efficiency than the radially polarized thin cylindrical transducers. The electric-acoustic impulse response of the transducers consisted of a direct-current damping with lower-frequency components, a damping oscillation with higher-frequency elements, and a higher resonant frequency of the transducer over its center frequency. The characteristics of radiated acoustic signals included contributions from the geometrical shape and size of the transducer, the physical parameters of piezoelectric material, the type of driving-voltage signals, and the polarization mode of the transducers. In comparison, our theoretical predictions are in good agreement with experimental observations. It is plausible that using the tangentially polarized thin cylindrical transducers as sensors in the acoustic-logging tool may significantly improve the signal-to-noise ratio of the measured acoustic-logging signals.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2072-666X 2072-666X
DOI:	10.3390/mi12111333