Ultrasonic transducer

Details Ultrasonic transducer Ultrasonic transducer

1981-05-08

1982-08-10

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

73625, 310336, 128660, 367164, 367903, G01S 1502

Patent

active

043441599

ABSTRACT:
An ultrasonic signal transducer is characterized in that the piezoelectrically active element has a first unitary electrode over the entire surface of one face and a matrix of a plurality of individual electrodes on the opposite face. In the receive mode, such an arrangement effectively constitutes a plurality of individual transducers arranged in the matrix array while maintaining the efficacy of a unitary structure. The signals from the individual electrodes are individually amplified, full-wave rectified, and combined additively to produce a composite signal which eliminates the phase cancellation of the ultrasonic pulses distributed over the face of the transducer assembly.

REFERENCES:
patent: 3090030 (1963-05-01), Schuck
patent: 4012952 (1977-03-01), Dory

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