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smart sensing using piezoelectric fiber that does not require a PC or complex circuitry

Research Project

Project/Area Number 21K05188
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 35020:Polymer materials-related
Research InstitutionKansai University

Principal Investigator

Tajitsu Yoshiro  関西大学, システム理工学部, 教授 (00282236)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords圧電性 / 高分子 / センシング / ポリ乳酸 / 組紐 / 回路 / センサ / ミシン縫い / 繊維 / 組みひも / 圧電繊維
Outline of Research at the Start

本研究では,その場でfabricのからの出力信号のみで動きを判定する簡素で実用的なシステムの構築を目指す.土台とするセンサ物質は圧電体である**.これを「繊維化」し,組紐状にしたり,刺繍状にすることで,「ねじり」「ずり」「ひっぱり」など日常の動きを自然な形で感知することが可能にする。これは非常に困難な課題設定であるが,京の伝統工芸「組紐」が培ってきた多彩な三次元織組構造創出技法を利活用し実現する.同時に装着時の違和感・抵抗感の原因となるfabric表面を覆う信号検出用金属電極の不要化を果たす.

Outline of Final Research Achievements

We have developed piezoelectric polylactic acid sensors for vital sensing using traditional craft techniques. In this study, in order to industrialize this handmade technique, we used the finite element method and devised a sewing shape using an industrial sewing machine to achieve the same functionality as the traditional craft technique. This has expanded the possibility of social implementation. Furthermore, the data transmission system using BLE that has been developed in the past had frequent signal loss problems due to the position and posture of the subject, but by thoroughly optimizing the circuit, the performance was dramatically improved. Finally, we were able to verify the accuracy of vital sensing using a sewing sensor with an ingenious stitching technique in the free behavior of a toy poodle, an indoor dog.

Academic Significance and Societal Importance of the Research Achievements

伝統的な几帳結びを用いた研究段階だったユニークなバイタルセンシングを、より実用的な工業的手法(ミシン縫いの方法)で実現することが可能になった。この成果は、大量生産可能な産業プロセスに転換する道を開いた。特に、室内犬を対象とした健康管理では、このセンサ技術が、動物の安全と快適を保ちながら連続的な健康モニタリングを可能にする。BLE通信の最適化によるデータ送信の安定化も、リアルタイムでの健康データの確実な受信を保証し、動物医療やペットケア産業における予防医学と早期発見の推進に寄与すると考える。この成果は、将来的には人間にも適用可能なウェアラブルセンサ技術の発展に繋がる一歩である。

Report

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

    (17 results)

All 2025 2024 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results) Book (3 results)

  • [Journal Article] Application of Braided Piezoelectric Poly-l-Lactic Acid Cord Sensor to Sleep Bruxism Detection System with Less Physical or Mental Stress2024

    • Author(s)
      Yoshiro Tajitsu , Saki Shimda, Takuto Nonomura, Hiroki Yanagimoto, Shun Nakamura , Ryoma Ueshima,Miyu Kawanobe, Takuo Nakiri, Jun Takarada, Osamu Takeuchi, Rei Nisho, Koji Takeshita,Mitsuru Takahashi and Kazuki Sugiyama
    • Journal Title

      MICROMACHINES

      Volume: 15 Issue: 1 Pages: 86-86

    • DOI

      10.3390/mi15010086

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microscopic piezoelectric response of poly (3-hydroxybutyrate-co-3-hydroxyhexanote) fiber2023

    • Author(s)
      Jun Takarada , Yuma Okawa, Isamu Nakagawa, Hiroshi Tsuneishi, and Yoshiro Tajitsu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SM Pages: SM1031-SM1031

    • DOI

      10.35848/1347-4065/acf586

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Application of Piezoelectric PLLA Braided Cord as Wearable Sensor to Realize Monitoring System for Indoor Dogs with Less Physical or Mental Stress2023

    • Author(s)
      Y. Tajitsu,et al.
    • Journal Title

      Micromachines

      Volume: 14 Issue: 1 Pages: 143-143

    • DOI

      10.3390/mi14010143

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Application of High-Photoelasticity Polyurethane to Tactile Sensor for Robot Hand2022

    • Author(s)
      M. Mitsuzuka,Y. Tajitsu,et al.
    • Journal Title

      Polymers

      Volume: 14 Issue: 23 Pages: 5057-5057

    • DOI

      10.3390/polym14235057

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Prototype Sensor System Using Fabricated Piezoelectric Braided Cord for Work-Environment Measurement during Work from Home2021

    • Author(s)
      Yoshiro Tajitsu, Jun Takarada, et al.
    • Journal Title

      Micromachines

      Volume: 12 Issue: 8 Pages: 966-978

    • DOI

      10.3390/mi12080966

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Feedback control of a pneumatically driven soft finger using a photoelastic polyurethane bending sensor2021

    • Author(s)
      Mori, Y; Fukuhara,Y ; Zhu, MZ ; Kinbara, Y; Wada, A ; Mitsuzuka, M ; Tajitsu, Y ; Kawamura, S
    • Journal Title

      ADVANCED ROBOTICS

      Volume: 35 Issue: 12 Pages: 771-786

    • DOI

      10.1080/01691864.2021.1911846

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of gripping sensor using polyurethane with high photoelastic constant2021

    • Author(s)
      Takarada, J ; Mitsuzuka, M; Sugino, Y; Mori, T ; Kinbara, Y; Kageoka, M ; Tawa, T; Kawamura, S ; Tajitsu, Y
    • Journal Title

      JAPANESE JOURNAL OF APPLIED PHYSICS

      Volume: 60 Issue: SF Pages: SFFD03-SFFD03

    • DOI

      10.35848/1347-4065/ac2216

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 高分子圧電及び光弾性シートを用いたソフトメカニカル 多軸触覚センサの可能性2024

    • Author(s)
      田實佳郎,宝田準,川原郁生,奥野広太郎,三塚雅彦,吉田光伸,田和 務
    • Organizer
      強誘電体応用会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] sustainableな圧電繊維を使った柔軟なwearable組紐センサ2022

    • Author(s)
      田實佳郎
    • Organizer
      電子情報通信学会 総合大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 圧電組紐センサの開発2022

    • Author(s)
      田實佳郎他
    • Organizer
      第39回強誘電体応用会議
    • Related Report
      2022 Research-status Report
  • [Presentation] 客観的心理測定に向けた圧電センサの適応可能性2022

    • Author(s)
      田實佳郎他
    • Organizer
      第46回静電気学会全国大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Pulse measurement and its signal processing with a flexible piezoelectric sensor for objective psychological assessment2022

    • Author(s)
      J. Takarada, Y. Tajitsu et al.
    • Organizer
      The 17th Pacific Polymer Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] フレキシブルセンサの新展開2022

    • Author(s)
      Y. Tajitsu
    • Organizer
      電子情報通信学会 シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Development of e-textile sewn together with embroidered fabric having motion sensing function using piezoelectric braided cord2021

    • Author(s)
      Y. Tajitsu
    • Organizer
      Materials Research Meeting(MRM2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] ロボットハンド用センサ ポリウレタン (ロボットハンド理論/実用ハンドブック)2025

    • Author(s)
      田實佳郎
    • Total Pages
      300
    • Publisher
      コロナ社
    • Related Report
      2023 Annual Research Report
  • [Book] 延伸による高分子の構造と物性制御2022

    • Author(s)
      田實佳郎(分担)
    • Total Pages
      310
    • Publisher
      S&T
    • ISBN
      9784907002886
    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Book] 環境発電ハンドブック2021

    • Author(s)
      田實佳郎(分担)
    • Total Pages
      528
    • Publisher
      NTS
    • ISBN
      9784860437480
    • Related Report
      2021 Research-status Report

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

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