Ultrasonic transceiver

Details Ultrasonic transceiver Ultrasonic transceiver

1978-02-22

1980-01-08

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With beam steering, scanning, or focussing

310326, 310369, 73290V, 367908, G01S 966, H04R 1700

Patent

active

041830075

ABSTRACT:
A transceiver capable of transmitting and receiving ultrasonic signals for liquid level gauging, the elapsed time between the transmission of a pulse and the reception of an echo pulse reflected from the surface of the liquid being measured to afford an index of the level of the liquid. The transponder is constituted by a piezoelectric transducer assembly suspended within an open-ended casing by an electrically non-conductive elastomeric material which serves to rapidly damp the vibratory activity of the transducer to prevent ringing thereof which interferes with reception. In the assembly, the piezoelectric transducer is sandwiched between a loading plate and a horn-shaped radiating plate, the assembly being held together by a bolt which extends between the plates and passes through the transducer. The transducer operates in the compression mode and is therefore capable of operating reliably with a high voltage drive signal to cause the radiating plate to emit an ultrasonic beam having a narrow angle.

REFERENCES:
patent: 3539980 (1970-11-01), Massa, Jr.
patent: 3716828 (1973-02-01), Massa
patent: 3739327 (1973-06-01), Massa
patent: 4031503 (1977-06-01), Minami

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