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Enhancing fingertip haptic sensitivity by cooling skin temperature effect and using stochastic resonance

Research Project

Project/Area Number 22K19794
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 61:Human informatics and related fields
Research InstitutionKyoto University

Principal Investigator

Endo Takahiro  京都大学, 工学研究科, 准教授 (70432185)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords触知覚 / 確率共鳴 / 指先触感覚の高感度化 / ノイズ / 触診
Outline of Research at the Start

人間にノイズを与えることで指先触知覚を向上させる確率共鳴において、ノイズ付与部の触覚受容器の特性を用いることで、指先触感覚を格段に高感度化させる手法を構築することを目的とする。具体的には、ノイズ付与部を冷却することでその感度を減退させ、大きなノイズを与えることで確率共鳴現象の強化を試みる。このために、手首部の知覚感度低下特性の解明、指先触感覚の高感度化手法の実現について研究開発を行う。

Outline of Final Research Achievements

The current approach to improving fingertip haptic sensation using stochastic resonance, which enhances haptic sensation by applying mechanical noise, has limitations in its improvement. While the haptic sensitivity would improve when sufficiently large noise is applied, fingertip haptic sensitivity decreases when a large noise that humans can perceive is applied to the wrist. Thus, we proposed a novel method to improve the fingertip haptic sensitivity by applying vibrotactile noise to a cooled wrist. Specifically, we confirmed that cooling the wrist skin reduces its sensitivity to vibrotactile stimuli. Thus, using this effect, we could apply a large but imperceptible noise to the wrist. This allowed us to propagate a large noise to the fingertip, improving the tactile sensation of the fingertip via the stochastic resonance effect. Through several experiments, we verified the efficacy of our proposed method.

Academic Significance and Societal Importance of the Research Achievements

本研究は、触覚の感度低下特性を用い、確率共鳴現象の強化を図る新たな試みであった。また温度依存という感度低下効果と、確率共鳴という感度向上効果の組合せによる知覚現象の解明は、世界初の知見を得ることであり、これらが研究成果の学術的意義である。さらに本研究の成果は、ノイズ付与だけでは迫れなかった、熟練手技を持つ技能者と同程度の知覚能力の獲得など、幅広い応用への展開が期待でき、大きな社会的意義を生む研究であると考えられる。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (5 results)

All 2024 2023

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Two-finger Stiffness Discrimination with the Stochastic Resonance Effect2024

    • Author(s)
      Chamnongthai Komi、Endo Takahiro、Matsuno Fumitoshi
    • Journal Title

      ACM Transactions on Applied Perception

      Volume: 21 Issue: 2 Pages: 1-17

    • DOI

      10.1145/3630254

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Band-Limited Vibrotactile Noise Enhances Fingertip Haptic Sensation2024

    • Author(s)
      Chamnongthai Komi、Li Zhu、Endo Takahiro
    • Journal Title

      Journal of Computing and Information Science in Engineering

      Volume: 24 Issue: 6

    • DOI

      10.1115/1.4064651

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhancing Fingertip Tactile Sensitivity by Vibrotactile Noise and Cooling Skin Temperature Effect2023

    • Author(s)
      Endo Takahiro、Kim Dong-Hwan、Chamnongthai Komi
    • Journal Title

      IEEE Transactions on Haptics

      Volume: 16 Issue: 3 Pages: 391-399

    • DOI

      10.1109/toh.2023.3299575

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-finger stiffness discrimination of a virtual object with haptic sensation enhancement via the stochastic resonance effect2023

    • Author(s)
      Komi Chamnongthai、Takahiro Endo、Fumitoshi Matsuno
    • Journal Title

      Displays

      Volume: - Pages: 102429-102429

    • DOI

      10.1016/j.displa.2023.102429

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Enhancement of fingertip haptic sensation by band-limited vibrotactile noise2023

    • Author(s)
      Takahiro Endo、Komi Chamnongthai
    • Organizer
      The 9th IEEJ international workshop on Sensing, Actuation, Motion Control, and Optimization (SAMCON2023)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-07-05   Modified: 2025-01-30  

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