Development of a Permanent Magnet Elastomer (PME) Infused Soft Robot Skin for Tactile Sensing

Sahil Shembekar*, Mitsuhiro Kamezaki, Peizhi Zhang, Zhuoyi He, Yuhiro Iwamoto, Yasushi Ido, Hiroyuki Sakamoto, Shigeki Sugano

*Corresponding author for this work

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

Abstract

The skin is an important organ which enables humans to interact with the unstructured environment around. It is perfectly soft and covers the entire body providing immediate feedback even when that part is not directly in the field of vision. With the human skin as an inspiration, in this paper, we develop a novel completely soft robot skin for tactile sensing. The skin utilizes a new type of material called as Permanent Magnet Elastomer (PME) to replace the traditionally used hard permanent magnet for hall effect based tactile sensors. PME is formed by mixing Neodymium particles in a polymer base and using strong magnetization (up to 6 T) for anisotropy and to achieve strong and complete magnetization. The 6-axis soft PME is a perfect replacement for powerful hard magnets. We also do a thorough analysis of this material by infusing it in different types of silicone and as a result the most suitable combinations are selected. Performance tests show that the sensor can detect minute forces like 0.1 N. Moreover, the hysteresis test is carried out and the hysteresis error for our skin is found to be only 1.402%. An overloading test is also performed by loading the skin up to 64 N to check the robustness. In conclusion, the skin can produce reliable Triaxial force measurements and we present two models of it for smaller and large force range measurements respectively.

Original languageEnglish
Title of host publicationIEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages6039-6046
Number of pages8
ISBN (Electronic)9781665417143
DOIs
Publication statusPublished - 2021
Event2021 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2021 - Prague, Czech Republic
Duration: 2021 Sep 272021 Oct 1

Publication series

NameIEEE International Conference on Intelligent Robots and Systems
ISSN (Print)2153-0858
ISSN (Electronic)2153-0866

Conference

Conference2021 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2021
Country/TerritoryCzech Republic
CityPrague
Period21/9/2721/10/1

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Computer Vision and Pattern Recognition
  • Computer Science Applications

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