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  4. Soft Monolithic Shielded Sensors to Measure Shear and Normal Forces for Local Slip Detection
 
research article

Soft Monolithic Shielded Sensors to Measure Shear and Normal Forces for Local Slip Detection

Aksoy, Bekir  
•
Digumarti, Krishna Manaswi  
•
Shea, Herbert  
May 3, 2024
Advanced Materials Technologies

Soft force sensors enable closed loop control or autonomous operation of compliant robot systems. A stretchable force sensing surface containing an array of independent sensor units is reported. This design allows for the measurement of local shear and normal forces at multiple locations, independently, providing real-time, multi-axis force information at each unit. The sensor array is based on capacitive strain sensing, using liquid metal electrodes and air microchannel for high sensitivity. Electromechanical interference between adjacent sensor units is addressed and eliminated through design optimization and the use of compliant electrical shield layers. A 1D sensor array is applied to gripping tasks, where the independent sensor readings enable detecting local and partial slipping. This study illustrates how the device can be used to explore the dynamics of local forces during the stages of pick up, slip, and release.|Introducing a soft force sensing surface with electromechanically decoupled units, capable of measuring local shear and normal forces in real time. Combining stretchable electromagnetic shields with liquid metal electrodes, the design minimizes the external as well as internal interferences of neighboring units. Applied to gripping tasks, it detects partial and catastrophic slips, unveiling force dynamics during object manipulation.

  • Details
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Type
research article
DOI
10.1002/admt.202400486
Web of Science ID

WOS:001217126700001

Author(s)
Aksoy, Bekir  
Digumarti, Krishna Manaswi  
Shea, Herbert  
Date Issued

2024-05-03

Publisher

Wiley

Published in
Advanced Materials Technologies
Subjects

Technology

•

Electromechanical Decoupling

•

Multi-Axis Force Measurement

•

Partial Slip Detection

•

Shielded Sensory Array

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMTS  
FunderGrant Number

Schweizerischer Nationalfonds zur Frderung der Wissenschaftlichen Forschung

869963

European Union

200020_184661

Swiss National Science Foundation

Available on Infoscience
June 5, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/208290
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