Ultrasonic transducer with reduced acoustic cross coupling

Details Ultrasonic transducer with reduced acoustic cross coupling Ultrasonic transducer with reduced acoustic cross coupling

1990-10-11

1992-12-29

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

310326, 367162, G01S 1500

Patent

active

051757095

ABSTRACT:
A continuous wave driven ultrasonic transducer for determining doppler frequency shift in reflected ultrasonic pressure waves in which the transmitter and receiver sections are constructed of a composite core having a plurality of segments of piezoelectric material separated by acoustic suppression material. Also disclosed is a method of reducing acoustic and mechanical cross coupling between piezoelectric transmitter and receiver sections of an ultrasonic transducer by arranging segments of piezoelectric material in a lateral array, and separating the piezoelectric segments with ultrasonic acoustic suppression material to produce a composite transducer core of reduced acoustic and mechanical cross coupling.

REFERENCES:
patent: 4672591 (1987-06-01), Breimesser et al.
patent: 4890268 (1989-12-01), Smith et al.
The Role of Piezocomposites in Ultrasonic Transducers, by Wallace Arden Smith, 1989 Ultrasonic Symposium, 755-766.

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