Flextensional transducer

Details Flextensional transducer Flextensional transducer

1978-12-11

1983-05-17

Tudor, Harold J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367153, 367163, 367168, H04B 1300

Patent

active

043843514

ABSTRACT:
A magnetic drive is provided for a flextensional transducer in order to adapt the flextensional transducer for operation at increased ocean depths without the necessity of liquid filling and complex decoupling devices. In one embodiment an electro-magnetic actuator is positioned between the walls of the flextensional shell and is driven electrically so as to deflect the shell walls outwardly. The magnetic actuator in one embodiment includes a permanent magnet and pole pieces supported on one of the interior walls of the shell, with a moving coil positioned between the pole pieces and supported on a diametrically opposite wall of the shell. In an alternative embodiment, the magnetic actuation may be in the form of a rod of magnetostrictive material between opposing interior walls of the shell, which is actuated by an overwound electrical coil, with the shell being of magnetic material such as magnetic iron.

REFERENCES:
patent: 2063950 (1936-12-01), Steinberger
patent: 2977573 (1961-03-01), Mott
patent: 3121212 (1964-02-01), Weber et al.
patent: 3274537 (1966-09-01), Toulis
patent: 3277433 (1966-10-01), Toulis
patent: 3466017 (1969-09-01), Malvin
patent: 3470402 (1969-09-01), Abbott
patent: 3538494 (1970-11-01), Erickson

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