Magnetic Interference Avoidance in Resistive Sensors
First Claim
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1. A strain-responsive sensor comprising:
- a strain-sensitive element comprising;
a substrate;
a first resistive structure coupled to a first surface of the substrate and electrically coupled to an electrical circuit;
a second resistive structure coupled to a second surface of the substrate opposite the first surface; and
a crossover coupling the electrically resistive structure to the electrical circuit such that current flows within the second resistive structure in the same direction as the first resistive structure.
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Abstract
A strain-responsive sensor incorporating a strain-sensitive element is disclosed. The strain-sensitive element includes a matched-pair of resistive structures disposed on opposite sides of a substrate. One resistive structure of the matched pair is coupled to a crossover, either a physical crossover or a soft crossover, such that current within the resistive structures of the matched pair flows in the same direction.
23 Citations
20 Claims
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1. A strain-responsive sensor comprising:
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a strain-sensitive element comprising; a substrate; a first resistive structure coupled to a first surface of the substrate and electrically coupled to an electrical circuit; a second resistive structure coupled to a second surface of the substrate opposite the first surface; and a crossover coupling the electrically resistive structure to the electrical circuit such that current flows within the second resistive structure in the same direction as the first resistive structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An input sensor comprising:
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a substrate comprising; an upper surface; and a lower surface opposite the upper surface; a strain-responsive sensor comprising an array of strain-sensitive elements, each strain-sensitive element comprising; an upper resistive structure coupled to the upper surface; a lower resistive structure coupled to the lower surface; and a crossover coupled to the lower resistive structure such that current within the lower resistive structure flows in the same direction as current within the upper resistive structure;
wherein;a first pair of upper resistive structures are configured to share a drive lead; a second pair of lower resistive structures are configured to share a drive lead. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of operating a strain-responsive sensor comprising:
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applying a first voltage of a first polarity to a first resistive structure of the strain-responsive sensor; applying a second voltage of the first polarity to a second resistive structure of the strain-responsive sensor, the second resistive structure aligned with and separated from the first resistive structure by a substrate; measuring an output voltage of a balancing network electrically coupled to the first resistive structure and the second resistive structure; and associating the measured output voltage with an amount of strain experienced by one or both of the first resistive structure and the second resistive structure. - View Dependent Claims (18, 19, 20)
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Specification