Self-powered switch initiation system
First Claim
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1. A self-powered switching system, comprising:
- a flextensional transducer, said flextensional transducer comprising;
a first electroactive member having opposing first and second electroded major faces;
said first opposing major face being substantially convex and said second opposing major face being substantially concave;
a prestress layer bonded to said second major face of said first electroactive member;
said prestress layer applying a compressive force to said electroactive member;
said prestress layer having first and second ends adjacent said concave face of said first electroactive member;
wherein said flextensional transducer is adapted to deform from a first position to a second position upon application of a force to said flextensional transducer;
and wherein upon said deformation to said second position, said flextensional transducer is adapted to generate a first voltage potential between said first electroded major face and said second electroded major face;
a mounting member for retaining said first end of said prestress layer;
said mounting member comprising a plate adjacent said first end of said prestress layer and said convex face of said flextensional transducer;
said mounting member comprising clamping means adjacent said first end of said prestress layer and said concave face of said flextensional transducer;
pressure application means for application of a force to said second end of said prestress layer, said pressure application means being adapted to apply a force sufficient to deform said flextensional transducer from said first position to said second position, thereby generating said first voltage potential;
a first conductor electrically connected to said first electroded major face of said first electroactive member;
a second conductor electrically connected to said second electroded major face of said first electroactive member;
first signal transmission means electrically connected to said first and second conductors;
said first signal transmission means comprising a first radio frequency generator subcircuit connected to an antenna;
signal reception means for receiving a first signal transmitted by said first signal transmission means;
said signal reception means being adapted to generate a second signal in response to said first signal transmitted by said signal transmission means; and
a switch having a first position and a second position;
said switch being in communication with said signal reception means;
said switch being adapted to change between said first position and said second position in response to said second signal.
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Abstract
A self-powered switching device using a prestressed flextensional electroactive member generates a signal for activation of a latching relay. The electroactive member has a piezoelectric element with a convex and a concave face that may be compressed to generate an electrical pulse. The flextensional electroactive member and associated signal generation circuitry can be hardwired directly to the latching relay or may be coupled to a transmitter for sending an RF signal to a receiver which actuates the latching relay.
29 Citations
59 Claims
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1. A self-powered switching system, comprising:
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a flextensional transducer, said flextensional transducer comprising; a first electroactive member having opposing first and second electroded major faces; said first opposing major face being substantially convex and said second opposing major face being substantially concave; a prestress layer bonded to said second major face of said first electroactive member; said prestress layer applying a compressive force to said electroactive member; said prestress layer having first and second ends adjacent said concave face of said first electroactive member; wherein said flextensional transducer is adapted to deform from a first position to a second position upon application of a force to said flextensional transducer; and wherein upon said deformation to said second position, said flextensional transducer is adapted to generate a first voltage potential between said first electroded major face and said second electroded major face; a mounting member for retaining said first end of said prestress layer; said mounting member comprising a plate adjacent said first end of said prestress layer and said convex face of said flextensional transducer; said mounting member comprising clamping means adjacent said first end of said prestress layer and said concave face of said flextensional transducer; pressure application means for application of a force to said second end of said prestress layer, said pressure application means being adapted to apply a force sufficient to deform said flextensional transducer from said first position to said second position, thereby generating said first voltage potential; a first conductor electrically connected to said first electroded major face of said first electroactive member; a second conductor electrically connected to said second electroded major face of said first electroactive member; first signal transmission means electrically connected to said first and second conductors; said first signal transmission means comprising a first radio frequency generator subcircuit connected to an antenna; signal reception means for receiving a first signal transmitted by said first signal transmission means; said signal reception means being adapted to generate a second signal in response to said first signal transmitted by said signal transmission means; and a switch having a first position and a second position; said switch being in communication with said signal reception means; said switch being adapted to change between said first position and said second position in response to said second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A self-powered switching system comprising:
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an electroactive transducer having first and second ends, said electroactive transducer comprising; a first electroactive member having opposing first and second electroded major faces and first and second ends; a flexible substrate bonded to said second major face of said first electroactive member; said flexible substrate having first and second ends adjacent said first and second ends of said first electroactive member; wherein said electroactive transducer is adapted to deform from a first position to a second position upon application of a force to said electroactive transducer; and wherein said electroactive transducer is adapted to return to said first position from said second position upon release of said force from said electroactive transducer; and wherein upon said deformation and said return between said first and second positions, said electroactive transducer is adapted to generate an oscillating voltage potential between said first electroded major face and said second electroded major face; a mounting member for retaining said first end of said electroactive transducer; said mounting member comprising a plate adjacent said first end of said flexible substrate and said first major face of said first electroactive member; said mounting member comprising retaining means adjacent said first end of said flexible substrate and opposite said second major face of said first electroactive member; pressure application means for application of a force to said second end of said electroactive transducer, said pressure application means being adapted to apply a force sufficient to deform said electroactive transducer from said first position to said second position, thereby generating a first voltage potential; a first conductor electrically connected to said first electroded major face of said first electroactive member; a second conductor electrically connected to said second electroded major face of said first electroactive member; a rectifier electrically connected between said first and second conductors in parallel with said first and second electroded major faces of said electroactive transducer; a voltage regulator having an input side and an output side; said input side of said voltage regulator being electrically connected to an output side of said rectifier; first signal transmission means electrically connected to said output side of said voltage regulator; said first signal transmission means comprising a first radio frequency generator subcircuit connected to an antenna; signal reception means for receiving a first signal transmitted by said first signal transmission means; said signal reception means being adapted to generate a second signal in response to said first signal transmitted by said first signal transmission means; and a switch having a first position and a second position; said switch being in communication with said signal reception means; said switch being adapted to change between said first position and said second position in response to said second signal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A self-powered switching system, comprising:
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an electroactive transducer having first and second ends, said electroactive transducer comprising; a first electroactive member having opposing first and second electroded major faces and first and second ends; a flexible substrate bonded to said second major face of said first electroactive member; said flexible substrate having first and second ends adjacent said first and second ends of said first electroactive member; wherein said electroactive transducer is adapted to deform from a first position to a second position upon application of a force to said electroactive transducer; and wherein said electroactive transducer is adapted to return to said first position from said second position upon release of said force from said electroactive transducer; and wherein upon said deformation from said first position to second position, said electroactive transducer is adapted to generate a first voltage potential between said first electroded major face and said second electroded major face; and wherein upon said return from said first position to second position, said electroactive transducer is adapted to generate a second voltage potential between said first electroded major face and said second electroded major face; a mounting member for retaining said first end, said second end or said first and second ends of said electroactive transducer; said mounting member comprising at least one retaining means adjacent said first end, said second end or said first and second ends of said flexible substrate of said first electroactive member; pressure application means for application of a force to said first end, said second end or between said first and second ends of said electroactive transducer, said pressure application means being adapted to apply a force sufficient to deform said electroactive transducer from said first position to said second position, thereby generating a first voltage potential; a first conductor electrically connected to said first electroded major face of said first electroactive member; a second conductor electrically connected to said second electroded major face of said first electroactive member; a rectifier electrically connected between said first and second conductors in parallel with said first and second electroded major faces of said electroactive transducer; a voltage regulator having an input side and an output side; said input side of said voltage regulator being electrically connected to an output side of said rectifier; first signal transmission means electrically connected to said output side of said voltage regulator; said first signal transmission means comprising a first radio frequency generator subcircuit connected to an antenna; electrical energy storage means having a first and a second terminal; said first terminal of said electrical energy storage means being electrically connected to the output side of said voltage regulator; said second terminal of said electrical energy storage means being electrically connected to ground; whereby said electrical energy storage means may store an electrical output of said voltage regulator; and wherein said electrical energy storage means is adapted to supplement said electrical output of said voltage regulator to said first signal transmission means with said stored output electrical signal of said voltage regulator; signal reception means for receiving a first signal transmitted by said first signal transmission means; said signal reception means being adapted to generate a second signal in response to said first signal transmitted by said first signal transmission means; and a switch having a first position and a second position; said switch being in communication with said signal reception means; said switch being adapted to change between said first position and said second position in response to said second signal.
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38. A self-powered switching system, comprising:
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an electroactive transducer having first and second ends, said electroactive transducer comprising; a first electroactive member having opposing first and second electroded major faces and first and second ends; a flexible substrate bonded to said second major face of said first electroactive member; said flexible substrate having first and second ends adjacent said first and second ends of said first electroactive member; wherein said electroactive transducer is adapted to deform from a first position to a second position upon application of a force to said electroactive transducer; and wherein said electroactive transducer is adapted to return to said first position from said second position upon release of said force from said electroactive transducer; and wherein upon said deformation from said first position to second position, said electroactive transducer is adapted to generate a first voltage potential between said first electroded major face and said second electroded major face; and wherein upon said return from said first position to second position, said electroactive transducer is adapted to generate a second voltage potential between said first electroded major face and said second electroded major face; a mounting member for retaining said first end, said second end or said first and second ends of said electroactive transducer; said mounting member comprising at least one retaining means adjacent said first end, said second end or said first and second ends of said flexible substrate of said first electroactive member; pressure application means for application of a force to said first end, said second end or between said first and second ends of said electroactive transducer, said pressure application means being adapted to apply a force sufficient to deform said electroactive transducer from said first position to said second position, thereby generating a first voltage potential; a first conductor electrically connected to said first electroded major face of said first electroactive member; a second conductor electrically connected to said second electroded major face of said first electroactive member; a rectifier electrically connected between said first and second conductors in parallel with said first and second electroded major faces of said electroactive transducer; a voltage regulator having an input side and an output side; said input side of said voltage regulator being electrically connected to an output side of said rectifier; first signal transmission means electrically connected to said output side of said voltage regulator; said first signal transmission means comprising a first radio frequency generator subcircuit connected to an antenna; electrical energy storage means having a first and a second terminal; said first terminal of said electrical energy storage means being electrically connected to the output side of said rectifier; said second terminal of said electrical energy storage means being electrically connected to ground; whereby said electrical energy storage means may store an electrical output of said rectifier; and wherein said electrical energy storage means is adapted to supplement said electrical output of said voltage regulator to said first signal transmission means with said stored output electrical signal of said voltage regulator; signal reception means for receiving a first signal transmitted by said first signal transmission means; said signal reception means being adapted to generate a second signal in response to said first signal transmitted by said first signal transmission means; and a switch having a first position and a second position; said switch being in communication with said signal reception means; said switch being adapted to change between said first position and said second position in response to said second signal. - View Dependent Claims (39)
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40. A switching system, comprising:
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electromechanical generation means for generating an oscillating voltage across first and second electrical terminals; a rectifier electrically connected between said first and second electrical terminals; a voltage regulator having an input side and an output side; said input side of said voltage regulator being electrically connected to an output side of said rectifier; first signal transmission means electrically connected to said output side of said voltage regulator; said first signal transmission means comprising a first electromagnetic signal generator subcircuit connected to transmitter; signal reception means for receiving a first electromagnetic signal transmitted by said first signal transmission means; said signal reception means being adapted to generate a second signal in response to said first electromagnetic signal transmitted by said first signal transmission means; and a switch having a first position and a second position; said switch being in communication with said signal reception means; said switch being adapted to change between said first position and said second position in response to said second signal. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A self-powered switching system, comprising:
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an electromechanical generator for generating a voltage across first and second electrical terminals; a voltage regulator having an input side and an output side; said input side of said voltage regulator being electrically connected to said first and second electrical terminals; first signal transmission means electrically connected to said output side of said voltage regulator; said first signal transmission means comprising a first electromagnetic signal generator subcircuit connected to a transmitter; and a first tone generator subcircuit having an input side and an output side; said input side of said tone generator subcircuit being connected to said output side of said voltage regulator; said output side of said tone generator subcircuit being connected to said first electromagnetic signal generator subcircuit; wherein said first tone generator and said first electromagnetic signal generator subcircuits comprise at least one programmable encoder circuit; and wherein each of said first programmable encoder circuits is adapted to be programmed to generate one or more unique codes; and wherein each of said unique codes generated by each of said first programmable encoder circuits is different from each of said unique codes generated by the others of said first programmable encoder circuits; signal reception means for receiving a first electromagnetic signal transmitted by said first signal transmission means; said signal reception means being adapted to generate a second signal in response to said first electromagnetic signal transmitted by said first signal transmission means; and a switch having a first position and a second position; said switch being in communication with said signal reception means; said switch being adapted to change between said first position and said second position in response to said second signal. - View Dependent Claims (59)
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Specification