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Actuator Implementation and Evaluation of Soft Inductive Tactile Sensor with Liquid Metal Flow Channel

Research Project

Project/Area Number 20K19820
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 61010:Perceptual information processing-related
Research InstitutionOsaka University

Principal Investigator

Kawasetsu Takumi  大阪大学, 基礎工学研究科, 助教 (70868330)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords柔軟触覚センサ / ソフトアクチュエータ / ソフトロボット / 液体金属 / イオン液体 / ソフトグリッパ / 物体認識 / 触覚センサ / ソフトセンサ / ソフトセンサー / ソフトロボティクス
Outline of Research at the Start

やわらかさの異なるソフトアクチュエータと柔軟触覚センサ,両者の特性を損なわない組み合わせ手法の実現を目指し,コイル式触覚センサの柔軟/硬質素材の分離構造に着目した「液体金属流路を備える触覚センサ」を提案する.本研究では提案センサの流路や柔軟素材形状等のセンサ構造と応答の網羅的調査およびソフトハンドを構築し触覚情報を用いた物体把持性能の評価を通じてソフトアクチュエータへの触覚センサ埋め込みの設計・製造・評価の一連のプロセスを体系化する.

Outline of Final Research Achievements

This study aimed to realize a method of combining soft actuators and flexible tactile sensors with different softnesses that does not compromise the softness of both. First, we developed and evaluated a soft tactile sensor equipped with a liquid metal flow channel by applying the separation structure of soft and hard materials of an inductive tactile sensor. As a result, we confirmed that the contact force can be estimated from the inductance of the coil installed outside as the displacement of the liquid metal in the flow channel. In addition, we proposed a soft gripper consisting of an ionic liquid tactile sensor and a soft actuator, and showed that the gripped objects can be classified from the tactile time series information obtained by grasping multiple objects.

Academic Significance and Societal Importance of the Research Achievements

ヒトと共存するロボットへやわらかな身体を与えることは,本質的に安全なインタラクションを実現する上でも,環境への多様な働きかけとそこから生まれる豊かな環境情報を得るために重要である.これまで多数の柔軟触覚センサが開発されてきたが,力検出箇所から硬さを取り除き,柔らかなアクチュエータと本来の柔らかさを損なわないように組み合わせることは困難であった.本提案では,力検出箇所には一切硬い素材を埋め込む必要が無く,柔らかな素材のみでセンサ及びアクチュエータを構成できる.この構造は,やわらかなロボットを実現する上で柔軟/硬質素材の構造的分離に極めて有用であり,本分野発展に資するものである.

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (14 results)

All 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results)

  • [Journal Article] Soft capacitive tactile sensor using displacement of air?water interface2021

    • Author(s)
      Usui Tatsuya、Ishizuka Hiroki、Kawasetsu Takumi、Hosoda Koh、Ikeda Sei、Oshiro Osamu
    • Journal Title

      Sensors and Actuators A: Physical

      Volume: 332 Pages: 113133-113133

    • DOI

      10.1016/j.sna.2021.113133

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Soft Inductive Tactile Sensor Using Flow-Channel Enclosing Liquid Metal2020

    • Author(s)
      Shota Hamaguchi, Takumi Kawasetsu, Takato Horii, Hisashi Ishihara, Ryuma Niiyama, Koh Hosoda, and Minoru Asada
    • Journal Title

      IEEE Robotics and Automation Letters

      Volume: 5(3) Issue: 3 Pages: 4028-4034

    • DOI

      10.1109/lra.2020.2985573

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Soft Capacitive Tri-axis Tactile Sensor Based on Level Sensing2021

    • Author(s)
      T. Usui、H. Ishizuka、T. Kawasetsu、K.Hosoda、S. Ikeda、O. Oshiro
    • Organizer
      The European Japan Experts Association International Conference 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 柔軟接触センサを搭載したロボットハンドを用 いたアクティブセンシングによる物体認識2021

    • Author(s)
      徳野将士、田中悠一朗、川節拓実、細田耕、田向権
    • Organizer
      第39回日本ロボット学会学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] A Decentralized Approach to Cooperative Object Transportation with Robots Equipped with Flexible Tactile Sensors2021

    • Author(s)
      Yi Zhang、Yuichiro Sueoka、Hisashi Ishihara、Takumi Kawasetsu、Koichi Osuka
    • Organizer
      第39回日本ロボット学会学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 光学式触覚センサとエコーステートネットワークによる物体認識2021

    • Author(s)
      小菅佑太、川節拓実、田向権、細田耕
    • Organizer
      ロボティクス・メカトロニクス講演会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 圧力と接触位置のためのイオンゲル触覚センサの開発2021

    • Author(s)
      安田匠利、大橋ひろ乃、川節拓実、細田耕
    • Organizer
      ロボティクス・メカトロニクス講演会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Soft Inductive Tactile Sensor Using Flow-Channel Enclosing Liquid Metal2020

    • Author(s)
      Hamaguchi Shota、Kawasetsu Takumi、Horii Takato、Ishihara Hisashi、Niiyama Ryuma、Hosoda Koh、Asada Minoru
    • Organizer
      IEEE International Conference on Soft Robotics 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Unconventional tactile sensors in soft robotics2020

    • Author(s)
      Takumi Kawasetsu
    • Organizer
      ICRA2020 Workshop on “Unconventional Sensors in Robotics: Perception for Online Learning, Adaptive Behavior, and Cognition”
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 柔軟触覚センサを搭載したロボットハンドによる 触覚情報からの物体認識2020

    • Author(s)
      徳野将士, 田中悠一朗, 川節拓実, 細田耕, 田向権
    • Organizer
      第38回日本ロボット学会学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Soft Tactile Sensor Detecting Air-Water Interface2020

    • Author(s)
      Tatsuya Usui, Hiroki Ishizuka, Takumi Kawasetsu, Koh Hosoda, Sei Ikeda, Osamu Oshiro
    • Organizer
      IEEE Sensors Conference 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Object Recognition Using Flexible Tactile Sensor2020

    • Author(s)
      Shoshi Tokuno, Yuichiro Tanaka, Takumi Kawasetsu, Koh Hosoda, Hakaru Tamukoh
    • Organizer
      Asia Pacific Conference on Robot IoT System Development and Platform 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Soft inductive tactile sensor using liquid metal and coils2020

    • Author(s)
      Takumi Kawasetsu
    • Organizer
      The 3rd International Symposium on Symbiotic Intelligent Systems: “A New Era towards Responsible Robotics and Innovation”
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 触覚センサから考えるソフロボの未来 やわらかさと硬さを好いかげんにつなぐ2020

    • Author(s)
      川節拓実
    • Organizer
      ロボティクス・メカトロニクス 講演会 2020 in Kanazawa シンポジウム「異分野融合で“いいかげん”を科学するソフトロボット学」
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2020-04-28   Modified: 2023-01-30  

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