A Lever-Type Method of Strain Exposure for Disk F-Shaped Torque Sensor Design

Disk-shaped torque sensors are widely used in robotic joints and wheel driving. However, in terms of conventional spoke-type geometries, there is always a trade-off between sensitivity and stiffness, because their strain exposure depends upon a bending deformation mode which causes strain nonuniform...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 20; no. 2; p. 541
Main Authors Shu, Ran, Chu, Zhigang, Shu, Hongyu
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 19.01.2020
MDPI
Subjects
Axial stress
disk f-shaped
Exposure
Geometry
lever-type
Nonuniformity
Sensors
Stiffness
strain exposure
Strain gauges
Stress concentration
torque sensor
Torque sensors (robotics)
Tradeoffs
lever-type
disk F-shaped
torque sensor
strain exposure
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Summary:Disk-shaped torque sensors are widely used in robotic joints and wheel driving. However, in terms of conventional spoke-type geometries, there is always a trade-off between sensitivity and stiffness, because their strain exposure depends upon a bending deformation mode which causes strain nonuniformity. This paper presents a lever-type method of strain exposure that performs a uniaxial tension and compression deformation mode to optimize the strain uniformity and improve the trade-off. Moreover, on the basis of this approach, the proposed disk F-shaped torque sensor enjoys has axial thinness, easy installation of strain gauges and flexible customization. The simulation and experimental results have validated the basic design idea.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s20020541