Flextensional sonar transducer assembly

Details Flextensional sonar transducer assembly Flextensional sonar transducer assembly

1989-04-14

1990-10-16

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367158, H04R 1700, H04R 3100

Patent

active

049641069

ABSTRACT:
A flextensional sonar transducer assembly includes a stack of piezoelectric elements disposed along a linear axis, a plurality of electrodes disposed between the elements, end pieces disposed at each end of the piezoelectric stack, with the end pieces having outwardly facing, generally arcuate surfaces, a compression band formed into a loop to encircle the stack and end pieces, a flexural shell disposed to circumscribe the compression band to present a generally elliptical side cross-section, with the major axis thereof being generally coincident with the linear axis of the stack, and with the shell being reactively coupled to the arcuate end portions of the compression band, and rod members positioned between the compression band and the arcuate end portions of the band of material for maintaining driving contact between the shell and the end pieces, and for adjusting the prestress compression pressure in the stack. The invention also includes methods of manufacturing the transducer assembly.

REFERENCES:
patent: 2849628 (1958-08-01), Mollmann
patent: 3274537 (1966-09-01), Toulis
patent: 3277433 (1966-10-01), Toulis
patent: 3718897 (1973-02-01), Abbott
patent: 4420826 (1983-12-01), Marshall, Jr. et al.
patent: 4462093 (1984-07-01), Upton
patent: 4731764 (1988-03-01), Ponchaud
patent: 4845687 (1989-07-01), Bromfield

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