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Development of high-power tactile display for presenting tactile sensation and directional navigation using shape memory alloy thick film

Research Project

Project/Area Number 21K14134
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 20020:Robotics and intelligent system-related
Research InstitutionWakayama National College of Technology

Principal Investigator

Xu Jiale  和歌山工業高等専門学校, 知能機械工学科, 准教授 (30898200)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords触覚ディスプレイ / 形状記憶合金 / バイアスばね / PDMS / マイクロアクチュエータ / MEMS / マイクロピン / 触感 / 厚膜形成
Outline of Research at the Start

触覚ディスプレイは点字や触感などの触覚情報を人工的に提示するツールであり、モバイル機器などへの応用が期待されている。これまでの触覚ディスプレイでは、十分な発生力や振幅を得るためにシステムが大きくなってしまう課題がある。
個人差なく刺激を提示するためには大きな発生力かつ振幅が必要である。そのため、形状記憶合金(SMA) 素子を2層接合して振幅を倍増する素子の作製手法を確立し、刺激提示に必要な振幅および発生力を明らかにするとともに、人間の知覚可能な振動刺激パターンを調べる。

Outline of Final Research Achievements

This study was conducted to realize high power tactile display that can present tactile information to human skin without individual differences between persons. By improving the thermal response of the shape memory alloy (SMA) thick film actuator, the effects of the liquid-cooling on the response of the SMA actuator were verified when SMA actuator was heated by pulse current heating. The SMA actuator was bonded to the PDMS bias spring with micro-pins after the micro-pins were fabricated on the PDMS bias spring using lithography technology. The amplitude of the SMA actuator with PDMS bias spring was evaluated at the frequency range of mechanoreceptors. It was found that the viscoelastic of the PDMS bias spring had a large effect on the vibrational amplitude of SMA actuator.

Academic Significance and Societal Importance of the Research Achievements

本研究では、SMA型触覚ディスプレイの高出力を目指したが、SMAアクチュエータと組み合わせるPDMSバイアスばねの粘弾性による影響が大きいことが明らかとなった。この結果をもとに今後のバイアスばねの再設計および高出力触覚ディスプレイの実現につなげたいと考えている。また、SMAアクチュエータとPDMSバイアスばねの接合技術を確立したことによってシール構造を実現することが可能となり、防塵や防水の効果が期待でき、触覚ディスプレイの実用化に寄与できると考えている。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (3 results)

All 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Fabrication of Tactile Display Mechanism Using Arrayed SMA Thick Film Actuator and Si TSV Layer with Individually Connecting Diode2021

    • Author(s)
      R. Saito, Y. Kimura, J. Xu, T. Mineta
    • Journal Title

      IEEJ Transactions on Sensors and Micromachines

      Volume: 141 Issue: 7 Pages: 260-264

    • DOI

      10.1541/ieejsmas.141.260

    • NAID

      130008060182

    • ISSN
      1341-8939, 1347-5525
    • Year and Date
      2021-07-01
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Characterization of the cooling-fluid-filled arrayed SMA thick film actuator for high power tactile display2022

    • Author(s)
      Jiale Xu, Yusuke Kimura, Kazuki Tuji, Akira Maruyama, Ryo Saito, Takashi Mineta
    • Organizer
      The 10th Asia-Pacific Conference of Transducers and Micro-Nano Technology
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characterization of the cooling-fluid-filled SMA thick actuator array for high power tactile display2021

    • Author(s)
      Jiale Xu, Yusuke Kimura, Kazuki Tuji, Akira Maruyama, Ryo Saito, Takashi Mineta
    • Organizer
      The 9th International Conference on Smart Systems Engineering 2021 (SmaSys2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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