Cantilever type acoustic transduction apparatus
AssigneeImage Acoustics, Inc.
InventorsJohn L. Butler, Alexander L. Butler
Life of this patent
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Abstract
An electro-mechanical transducer provides a very low frequency wide band response by using a quad configuration of piezoelectric cantilevers, providing additive output between the resonant frequencies of the cantilevers and achieves this at great depths under free flooded or oil filled conditions.
Claims23
A cantilever bender transducer with a minimum of four electromechanically active bending beam tines each having inner and outer tine ends and opposed sides, a center support member, the inner ends of respective tines commonly supported at the center support member, one pair of tines connected to the center support member and the other pair of tines, also connected to the center support member but extending in the opposite direction to the one pair of tines, and with at least two of the bending beam tines being activated, each said at least two active tines comprised of an inactive substrate and opposed piezoelectric plates forming the opposed sides and integrally formed with said inactive substrate, said inactive substrate and piezoelectric plates being coterminous so that the inactive substrate and opposed piezoelectric plates bend together when excited, and a voltage source for driving said active tines.
A cantilever tri-laminar bender transducer with two electro-mechanically bending circular or square plates, a center support post having opposed ends for respectively supporting the two circular or square plates, each said plates comprised of an inactive substrate and opposed piezoelectric plates forming the opposed sides and integrally formed with said inactive substrate, said inactive substrate and piezoelectric plates being coterminous so that the inactive substrate and opposed piezoelectric plates bend together when excited, and a voltage source for driving said plates in a planar bending mode through phase reversed excitation.
A cantilever bender transducer comprising:
- a plurality of electromechanically active bending beam tines each having inner and outer tine ends and opposed sides;
- a center support member having opposed one and other sides;
- the inner ends of respective tines commonly supported at the center support member;
- one pair of tines of the plurality connected to the one side of the center support member and the other pair of tines of the plurality connected to the other side of the center support member and extending in the opposite direction to the one pair of tines;
- each tine comprised of an inactive substrate and opposed piezoelectric plates forming the opposed sides and integrally formed with said inactive substrate, said inactive substrate and piezoelectric plates being coterminous so that the inactive substrate and opposed piezoelectric plates bend together when excited, and a voltage source for driving said tines.
Dependencies are inferred from the claim text.