Matching of series and parallel resonance frequencies for ultrasonic piezoelectric transducers

Author

Getman, I. ; Lopatin, S.

Author_Institution

Endress+Hauser GmbH+Co, Maulburg, Germany

Volume

2

fYear

2000

fDate

2000

Firstpage

713

Abstract

Piezoelectric elements show the maximum displacement and thus the optimum transmission performance at the series resonance frequency, but the maximum receiving voltage sensitivity occurs at the parallel resonance frequency which is higher as a series resonance frequency. Therefore if the piezoelectric element is operated at its series resonance so that it emits ultrasonic waves with maximum efficiency it can receive the echo response only with a poor sensitivity. For the alternative usage of the piezoelectric transducer as transmitter and receiver a matching of the series and parallel resonance frequencies is required. It is the object of the present work to provide a nontraditional (without λ/4 matching layer or additional inductances) method of matching so that the ultrasonic transducer has optimal transmission and reception characteristics with the same operating frequency

Keywords

echo; piezoelectric transducers; sensitivity; ultrasonic transducers; echo response; maximum displacement; maximum receiving voltage sensitivity; method of matching; operating frequency; optimum transmission performance; parallel resonance frequency; piezoelectric transducer; series resonance frequency; ultrasonic transducer; Electrodes; Filtering theory; Piezoelectric transducers; Resonance; Resonant frequency; Sensor phenomena and characterization; Shape; Transmitters; Ultrasonic transducers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on

Conference_Location

Honolulu, HI

ISSN

1099-4734

Print_ISBN

0-7803-5940-2

Type

conf

DOI

10.1109/ISAF.2000.942419

Filename

942419