Force sensor temperature compensation
First Claim
1. A force sensor apparatus, for use with a surgical instrument including a shaft and a wrist joint coupled to an end effector, the surgical instrument being operably couplable to a manipulator arm of a robotic surgical system, comprising:
- a plurality of strain gauges;
a tube portion including a proximal end, a distal end, a plurality of radial ribs that run along and radiate from a centerline axis of the tube, wherein a different strain gauge, from among the plurality of strain gauges, is positioned over each rib of the plurality of radial ribs to reduce temperature differences between opposing strain gauges by providing a direct thermal pathway between opposing strain gauges;
the proximal end of the tube portion operably couplable to the shaft of the surgical instrument;
the distal end of the tube portion operably couplable to the wrist joint of the surgical instrument; and
a thermal shunt shell over an outer surface of the tube portion.
3 Assignments
0 Petitions
Accused Products
Abstract
A force sensor apparatus is provided including a tube portion having a plurality of radial ribs and at least one fiber optic strain gauge positioned over each rib of the plurality of radial ribs. A proximal end of the tube portion is operably couplable to a shaft of a surgical instrument that is operably couplable to a manipulator arm of a robotic surgical system, and a distal end of the tube portion is proximally couplable to a wrist joint coupled to an end effector. A thermal shunt shell is over an outer surface of the tube portion.
108 Citations
14 Claims
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1. A force sensor apparatus, for use with a surgical instrument including a shaft and a wrist joint coupled to an end effector, the surgical instrument being operably couplable to a manipulator arm of a robotic surgical system, comprising:
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a plurality of strain gauges; a tube portion including a proximal end, a distal end, a plurality of radial ribs that run along and radiate from a centerline axis of the tube, wherein a different strain gauge, from among the plurality of strain gauges, is positioned over each rib of the plurality of radial ribs to reduce temperature differences between opposing strain gauges by providing a direct thermal pathway between opposing strain gauges; the proximal end of the tube portion operably couplable to the shaft of the surgical instrument; the distal end of the tube portion operably couplable to the wrist joint of the surgical instrument; and a thermal shunt shell over an outer surface of the tube portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification