Soft compressive sensor design and analysis

Zhang Hongying, Michael Yu Wang, Zhu Jian

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

In this paper, a methodology of designing an absolutely soft sensor based on Eco-Flex to detect compression stimuli is proposed. The fundamental structure of this soft sensor is a soft membrane sandwiched by two stretchable carbon grease electrodes, therefore the sensor as a capacitor can convert mechanical deformation to electrical signal. When the soft sensor is subject to compression stimuli, by detecting the capacitance change resulting from geometry deformation of sensor, the applied load can be inferred. To obtain a soft sensor with high sensitivity, two structures are proposed: sensor body with and without embedded chamber. By theoretically comparing the load-capacitance curve of them, it proves that the embedded chamber can improve the sensitivity of the compressive sensor. Besides, the dimension of the chamber has a great impact on the detection range and resolution. In this paper, 4 types of dimensions were investigated, and the mechanical - electrical curves show that, a relatively thicker chamber leads to a larger detection range but smaller resolution. Experimentally, we fabricate the two structures - with and without embedded chamber, and the response agrees well with the theoretical prediction. When come to the fabrication of the sensor, because rigid electrodes constrain deformation of the sensor, an approach of fabricating a solid soft electrode based on carbon grease was proposed in this paper.

Original languageEnglish
Title of host publicationProceedings of the 2015 7th IEEE International Conference on Cybernetics and Intelligent Systems, CIS 2015 and Robotics, Automation and Mechatronics, RAM 2015
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages255-260
Number of pages6
ISBN (Electronic)9781467373364
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventIEEE International Conference on Cybernetics and Intelligent Systems and the IEEE International Conference on Robotics, Automation and Mechatronics 2015 - Siem Reap, Cambodia
Duration: 15 Jul 201517 Jul 2015
Conference number: 7th
https://ieeexplore.ieee.org/xpl/conhome/7256710/proceeding (Proceedings)

Conference

ConferenceIEEE International Conference on Cybernetics and Intelligent Systems and the IEEE International Conference on Robotics, Automation and Mechatronics 2015
Abbreviated titleCIS & RAM 2015
Country/TerritoryCambodia
CitySiem Reap
Period15/07/1517/07/15
Internet address

Keywords

  • compressive sensor design
  • mechanical - electrical model
  • soft electrode
  • soft robot

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