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US 12,050,143 B2Granted
Symmetric trimming of strain gauges
AssigneeIntuitive Surgical Operations, Inc.
InventorAshwinram Suresh
Life of this patent
Estimating the term…
Abstract
A circuit is provided that includes a strain gauge resistor having a center axis and multiple conductor layer segments and a trim region extending along the center axis; wherein a first portion of the strain gauge resistor is located on one side of the center axis and a second portion of the strain gauge resistor is located on an opposite side of the center axis.
Claims17
A force sensor comprising:
- a beam, a tension strain gauge resistor, and a compression strain gauge resistor;
- wherein the beam includes a neutral axis;
- wherein the tension strain gauge resistor is located on the beam and the compression strain gauge resistor is located on the beam;
- wherein the tension strain gauge resistor and the compression strain gauge resistor share a common center axis parallel to the neutral axis;
- wherein the tension strain gauge resistor includes multiple first conductor segments arranged to provide a first current path, a first nonconducting trim region extending along the center axis, a first portion of the tension strain gauge resistor located on a first side of the center axis, and a second portion of the tension strain gauge resistor located on a second side of the center axis opposite the first side of the center axis;
- and
- wherein the compression strain gauge resistor includes multiple second conductor segments arranged to provide a second current path, a second nonconducting trim region extending along the center axis, a first portion of the compression strain gauge resistor located on the first side of the center axis, and a second portion of the compression strain gauge resistor located on the second side of the center axis.
4 more elements
A force sensor comprising:
- a beam and a first strain gauge resistor;
- wherein the beam has a neutral axis;
- wherein the first strain gauge resistor is located on the beam and has a center axis parallel to the neutral axis of the beam;
- wherein the first strain gauge resistor includes a first portion of the first strain gauge resistor located on a first side of the center axis, a second portion of the first strain gauge resistor located on a second side of the center axis opposite the first side, multiple conductor segments arranged to provide a first current path through the first portion and the second portion, and a nonconducting trim region extending along the center axis;
- wherein the multiple conductor segments include a middle elongated trim segment arranged parallel to the center axis and other conductor segments arranged perpendicular to the center axis;
- and
- wherein the nonconducting trim region extends within a portion of the middle elongated trim segment.
4 more elements
Dependencies are inferred from the claim text.