Magnetic interference avoidance in resistive sensors
First Claim
Patent Images
1. A strain-responsive sensor comprising:
- a planar substrate comprising;
a first surface; and
a second surface opposite the first surface; and
a strain-sensitive element comprising;
a first resistive structure disposed on the first surface following a first open-loop path;
a second resistive structure mirroring the first resistive structure, disposed on the second surface following a second open-loop path; and
a crossover electrically coupling the first resistive structure to the second resistive structure to define a single closed-loop structure that directs current through the first and second resistive structures in a same direction.
1 Assignment
0 Petitions
Accused Products
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.
147 Citations
20 Claims
-
1. A strain-responsive sensor comprising:
-
a planar substrate comprising; a first surface; and a second surface opposite the first surface; and a strain-sensitive element comprising; a first resistive structure disposed on the first surface following a first open-loop path; a second resistive structure mirroring the first resistive structure, disposed on the second surface following a second open-loop path; and a crossover electrically coupling the first resistive structure to the second resistive structure to define a single closed-loop structure that directs current through the first and second resistive structures in a same direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An input sensor comprising:
a planar 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 disposed on the upper surface following a first open-loop path; a lower resistive structure disposed on the lower surface opposite the upper resistive structure and following a second open-loop path mirroring the first open-loop path; and a crossover electrically coupling the lower resistive structure to the upper resistive structure to define a single closed-loop 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)
-
17. A method of operating a strain-responsive sensor comprising a mirrored pair of resistive structures disposed on opposite sides of a planar substrate, each resistive structure following an open-loop path, the method comprising:
-
applying a voltage across the strain-responsive sensor such that current flows through the mirrored pair of resistive structures in a closed loop defined from a reference frame normal to the substrate; measuring an output voltage of a balancing network electrically coupled to the mirrored pair of resistive structures; and associating the measured output voltage with an amount of strain experienced by one or both resistive structures of the mirrored pair of resistive structures. - View Dependent Claims (18, 19, 20)
-
Specification