Multifrequency composite ultrasonic transducer system

Details Multifrequency composite ultrasonic transducer system Multifrequency composite ultrasonic transducer system

1988-10-03

1990-10-16

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310334, H01L 4108

Patent

active

049637827

ABSTRACT:
A multifrequency composite ultrasonic transducer system includes a transducer comprised of piezoelectric ceramic rods embedded in a polymer matrix. By selecting the appropriate thickness and width of ceramic rod, the transducer assembly can be made to resonate at a number of frequencies. One of the resonance frequencies is determined by the thickness of the ceramic rod; other resonance frequencies are determined by the width and/or the ratio of width to thickness of the ceramic rods.

REFERENCES:
patent: 4276491 (1981-06-01), Daniel
patent: 4412148 (1983-10-01), Klicker et al.
patent: 4658176 (1987-04-01), Nakaya et al.
patent: 4683396 (1987-07-01), Takeuchi et al.
patent: 4801835 (1989-01-01), Nagaya
R. E. Newnham et al., "Composite Piezolectric Transducers", Materials in Engineering; vol. 2, Dec., 1980; pp. 93-106.
B. A. Auld, "High Frequency Piezoelectric Resonators", 1987 IEEE Int'l Symp. of Applications of Ferroelectrics, pp. 288-295.

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