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  4. An Any-Resolution Distributed Pressure Localization Scheme Using a Capacitive Soft Sensor Skin
 
conference paper

An Any-Resolution Distributed Pressure Localization Scheme Using a Capacitive Soft Sensor Skin

Sonar, Harshal Arun  
•
Yuen, Michelle Ching-Sum  
•
Kramer-Bottiglio, Rebecca
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April 28, 2018
2018 IEEE International Conference on Soft Robotics (RoboSoft)
IEEE RAS International Conference on Soft Robotics (RoboSoft)

We present a method to determine the location of an applied pressure on a large area, monolithic silicone based capacitive sensor. In contrast to pressure sensor arrays composed of n x n discrete sensors, we utilize a single sensor body with a single instrumentation interface to detect n pixels. We interrogate the capacitive sensor at different frequencies, thus modulating the effective length of the sensor. These interrogation frequencies are governed by the sensor’s total capacitance, resistance, and desired spatial resolution of the sensor. We developed an analytical model to calculate the frequency response at different length segments of the sensor and used the results to determine the interrogation frequencies for experimental studies. We performed experimental tests on a 1 x n sensor strip and an n x n sensor sheet and showed that we could attain greater than 90% accuracy in predicting the location of the applied pressure using a model generated by a multi-class kernel support vector machine. This approach towards distributed localization of point pressures greatly reduces the hardware complexity in comparison to discrete sensor arrays and increases the physical robustness of the system.

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Type
conference paper
DOI
10.1109/ROBOSOFT.2018.8404915
Author(s)
Sonar, Harshal Arun  
Yuen, Michelle Ching-Sum  
Kramer-Bottiglio, Rebecca
Paik, Jamie  
Date Issued

2018-04-28

Published in
2018 IEEE International Conference on Soft Robotics (RoboSoft)
Total of pages

6

Start page

170

End page

175

Subjects

Soft sensor

•

Sensor skin

•

Distributed tactile localization

•

soft robotics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
RRL  
NCCR-ROBOTICS  
Event nameEvent placeEvent date
IEEE RAS International Conference on Soft Robotics (RoboSoft)

Palazzo Pancaldi, Livorno, Italy

April 24-28, 2018

Available on Infoscience
February 5, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/144622
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