Transducer array
First Claim
1. A transducer for generating a resistance value representative of force applied thereto comprising:
- a conducting element having an exposed surface;
a first contact electrically connected to one side of said conducting element;
a second contact electrically connected to an opposite side of said conducting element;
means for creating a current flow in said conducting element;
a plurality of shunt elements each of which has an exposed surface generally directed toward the exposed surface on said conducting element;
means for urging said shunt element surfaces against said exposed surface of said conducting element;
wherein said shunt elements operated to shunt;
a portion of the current flow in said conducting element through said shunt elements when a current flow is created in said conducting element and said shunt element surfaces are urged against said exposed surface of said conducting element.
7 Assignments
0 Petitions
Accused Products
Abstract
A pressure sensitive transducer array in which a plurality of transducers are connected in series and in parallel with one another. In one embodiment, a resistive layer is formed from carbon or silver ink on a polyester film. A plurality of conductive shunt elements having greater conductivity than the resistive layer is formed on a second polyester film. The films are placed adjacent to one another with the shunt elements contacting the resistive layer. Voltage is applied across the resistive layer and pressure is applied thereto. As the pressure increases, the number of current paths set up through contact points on the shunt elements increase thereby decreasing the resistance across the resistive layer and increasing current flow. In another embodiment a plurality of plate elements are contained in a plane on one side of a dielectric layer. A plurality of plate elements are contained in a plane on the other side of the dielectric layer. As the layer is pushed together responsive to force applied, total capacitance as measured across the planes of plate elements varies.
99 Citations
58 Claims
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1. A transducer for generating a resistance value representative of force applied thereto comprising:
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a conducting element having an exposed surface; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; means for creating a current flow in said conducting element; a plurality of shunt elements each of which has an exposed surface generally directed toward the exposed surface on said conducting element; means for urging said shunt element surfaces against said exposed surface of said conducting element; wherein said shunt elements operated to shunt; a portion of the current flow in said conducting element through said shunt elements when a current flow is created in said conducting element and said shunt element surfaces are urged against said exposed surface of said conducting element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A transducer for sensing force comprising:
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a first substantially nonconducting film; a substantially planar conducting element formed on said first film; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; a second substantially nonconducting film; a plurality of shunt elements mounted on said second film to form a cluster of shunt elements, said second film being arranged opposite said first film with said conducting element and said shunt elements facing one another; means for compressing said shunt elements against said conducting element; and means for measuring the change in the resistance between said first and second contacts responsive to variations in electrical contact between said shunt elements and said conducting element. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for making a transducer for generating a resistance value representative of force applied thereto comprising the steps of:
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forming a substantially planar conducting element on a first planar surface; connecting a first electrical contact to one side of the conducting element; connecting a second electrical contact to an opposite side of said conducting element; forming a plurality of shunt elements on a second planar surface; and positioning said shunt elements generally opposite said planar conducting element. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A transducer for generating a resistance value representative of force applied thereto comprising:
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a substantially nonconducting substrate; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; a substantially planar conducting element having an exposed surface, said conducting element comprising a layer of ink formed on said substrate; a plurality of shunt elements each of which has an exposed surface generally directed toward the exposed surface on said conducting element; and means for urging said shunt element surfaces against said exposed surface of said conducting element. - View Dependent Claims (44, 45)
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46. A transducer for generating a resistance value representative of force applied thereto comprising:
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a conducting element having an exposed surface; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; a substantially nonconducting substrate; a plurality of shunt elements, each of which comprises a substantially planar layer of ink formed on said substrate, each ink layer having an exposed surface generally directed toward the exposed surface on said conducting element; and means for urging said shunt element surfaces against said exposed surface of said conducting element. - View Dependent Claims (47, 48, 49, 50)
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51. A transducer for sensing force comprising:
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a first substantially nonconducting film; a substantially planar conducting element formed on said first film; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; a second substantially nonconducting film; a plurality of shunt elements mounted on said second film to form a cluster of shunt elements, said second film being arranged opposite said first film with said conducting element and said shunt elements facing one another and said shunt elements each comprising a layer of ink; means for compressing said films together; and means for measuring the change in resistance between said first and second contacts resulting from variations in electrical contact between said shunt elements and said conducting element. - View Dependent Claims (52, 53, 54)
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55. A transducer for sensing force comprising:
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a first substantially nonconducting film; a substantially planar conducting element formed on said first film, said conducting element being made of carbon material; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; a second substantially nonconducting film; a plurality of shunt elements mounted on said second film to form a cluster of shunt elements, said second film being arranged opposite said first film with said conducting element and said shunt elements facing one another; means for compressing said films together; and means for measuring the change in resistance between said first and second contacts resulting from variations in electrical contact between said shunt elements and said conducting element. - View Dependent Claims (56)
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57. A transducer for sensing force comprising:
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a first substantially nonconducting film; a substantially planar conducting element formed on said first film; a first contact electrically connected to one side of said conducting element; a second contact electrically connected to an opposite side of said conducting element; a second substantially nonconducting film; a plurality of shunt elements mounted on said second film to form a cluster of shunt elements, said second film being arranged opposite said first film with said conducting element and said shunt elements facing one another; means for compressing said films together; means for creating a current flow in said conducting element; and means for shunting a portion of the current flow in said conducting element through said shunt elements when a current flow is created in said conducting element and said films are compressed together. - View Dependent Claims (58)
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Specification