Sealed, matched piezoelectric transducer

Details Sealed, matched piezoelectric transducer Sealed, matched piezoelectric transducer

1980-04-25

1981-10-27

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310335, 310327, 310336, 310337, 73642, 7386118, H01L 4108

Patent

active

042976073

ABSTRACT:
An ultrasonic transducer assembly for making measurements within a fluid, the assembly including a transducer, a backing member and a matching member all supported within a cylindrical metal housing with the transmitting face of the housing being sealed with a thin sealing element formed of a non-resilient relatively high impedance material encasing a matching layer having an acoustic impedance intermediate between that of the transducer element and the fluid. The thickness of the sealing element is between 1/10 and 1/1000th of a wavelength at the center frequency of the wave emitted by the transducer.

REFERENCES:
patent: 3427481 (1969-02-01), Lenahan et al.
patent: 3674945 (1972-07-01), Hands
patent: 3925692 (1975-12-01), Leschek et al.
patent: 3935484 (1976-01-01), Leschek et al.
patent: 4118649 (1978-10-01), Shwartzman et al.
patent: 4211948 (1980-07-01), Smith et al.
patent: 4211949 (1980-07-01), Brisken
patent: 4217684 (1980-08-01), Brisken

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