Quad and dual cantilever transduction apparatus
First Claim
1. A piezoelectric free-flooded bilaminar or trilaminar bender transducer comprised of a piezoelectric bender array, a stiff mass and a compliant RTV silicone rubber mass to create a difference in impedance between front and back sides of the bender array reducing the cancelling between the two radiating sides and providing greater output with a more omni-directional rather than dipole radiation pattern.
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Accused Products
Abstract
An electro-mechanical transducer is disclosed, which provides a very low frequency wide band response from a bender (or benders) using piezoelectric cantilevers or center mounted free edge disc, providing additive output between the resonant frequencies achieving this response at great depths under equivalent free flooded conditions with additionally improved response with silicone rubber to reduce the acoustic cancellation associated with the dipole mode of vibration of the bender.
52 Citations
24 Claims
- 1. A piezoelectric free-flooded bilaminar or trilaminar bender transducer comprised of a piezoelectric bender array, a stiff mass and a compliant RTV silicone rubber mass to create a difference in impedance between front and back sides of the bender array reducing the cancelling between the two radiating sides and providing greater output with a more omni-directional rather than dipole radiation pattern.
- 5. 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 a 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, a voltage source for driving said active tines, and a rubber mass that is disposed adjacent to said tines.
- 13. 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 plate, 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, a voltage source for driving said plates in a planar bending mode through phase reversed excitation, and a rubber mass that is disposed adjacent to said plates.
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15. A cantilever bender transducer comprising:
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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; a voltage source for driving said tines; and a rubber mass that is disposed adjacent to said tines. - View Dependent Claims (16, 17)
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18. A cantilever bender transducer comprising:
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at least one electro-mechanical bender member; a mounting plate; a center mass; a stem member for connecting the at least one electro-mechanical bender member with the center mass; at least one rubber mass mounted from said mounting plate and disposed adjacent to said center mass; and a voltage source for driving said bender member. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification