Hybrid piezoelectric and magnetostrictive acoustic wave transduc

Details Hybrid piezoelectric and magnetostrictive acoustic wave transduc Hybrid piezoelectric and magnetostrictive acoustic wave transduc

1982-09-30

1984-04-17

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310 26, 310328, 310337, H01L 4108

Patent

active

044437315

ABSTRACT:
The transducer is one that combines magnetostrictive and electrostrictive/piezoelectric transducer effects to form a transducer with improved performance. A transducer is provided which the two aforementioned effects are mechanically coupled in series allowing cancellation of the motion at one end of the transducer and maximization of the motion at the other end thereof. In an alternate construction, respective transducer types are connected mechanically in parallel in which the pressure may be cancelled on one side and increased on the other side of the transducer array. Either the velocity of pressure cancellation leads to a transducer element or transducer array with unidirectional properties. This device described herein may also be used as an intensity measuring instrument or as an acoustic sound repeater. Moreover, because the magnetostrictive part of the transducer is inductive and the piezoelectric part is capacitive, they may be used together to electrically tune each other and thus not require additional electrical elements.

REFERENCES:
patent: 2101272 (1937-12-01), Scott
patent: 2405604 (1946-08-01), Pope
patent: 2551848 (1951-05-01), Parker
patent: 2636135 (1953-04-01), Peek, Jr.
patent: 2683856 (1954-07-01), Kornei
patent: 2834943 (1958-05-01), Grisdale et al.
patent: 2945192 (1960-07-01), Szymanski
patent: 3148289 (1964-09-01), Pijls
patent: 3261339 (1966-07-01), Quinn
patent: 3484630 (1969-12-01), Schwartz

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