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Sensing the Signs of Fall Occurrence in the Elderly

Research Project

Project/Area Number 19K22735
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 58:Society medicine, nursing, and related fields
Research InstitutionTohoku University

Principal Investigator

Watanabe Takashi  東北大学, 医工学研究科, 教授 (90250696)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords転倒予測 / 慣性センサ / ニューラルネットワーク / クラスタリング / 歩隔 / 睡眠 / 転倒 / 予測 / 生体情報
Outline of Research at the Start

療法士や看護師らは,患者の様子から転倒発生の兆候を経験的にとらえることができる場合があることから,本研究では,転倒発生後の検出や転倒しやすさのリスク評価ではなく,転倒発生の兆候をとらえる技術の開発を目的とする.まず,ニューラルネットワークの学習を利用し,運動学的情報から健常者歩行との違いや個人の歩行の変動を自動的に検出することで,転倒発生の兆候を推定する方法の開発を行う.次に,自律神経系が関わる生体情報や睡眠情報を転倒発生の兆候の推定に利用することの有効性を検討する.これらのことから転倒発生の兆候をとらえる技術の実現可能性を検討し,その基盤技術の構築を目指す.

Outline of Final Research Achievements

Based on the idea of detecting signs of falls from gait changes, a method for detecting gait change using a neural network was developed. The results showing the feasibility of classifying gait pattern and classifying factors that cause gait change by using unsupervised learning were also obtained. Then, in order to estimate values of indices of factors that cause gait changes related to falls, methods to detect and evaluate abnormal foot movements in the early stance phase during walking, to estimate automatically stride length and walking speed, to detect automatically gait event timings, and to estimate the body center of mass position for evaluating balance during walking were developed using inertial sensors. Furthermore, a correlation between total sleep time and the feeling of walking instability in healthy subjects was found, which suggested the possibility of using total sleep time in detecting signs of falls.

Academic Significance and Societal Importance of the Research Achievements

転倒に関する多くの研究は,転倒が発生した結果の検出や,転倒しやすいタイプかどうかの判定にとどまっており,工学的技術を利用した転倒発生の兆候の検出の研究はほとんど行われていない.本研究は,看護師らの経験に基づく転倒の兆候の検出を工学的技術により実現することを目指して,運動情報と内面的状態に関係する生体情報や睡眠情報の利用可能性を検討し,簡便な慣性センサでの歩行計測で,転倒に関わる未知の歩容変化検出とその要因を分類する方法の実現可能性,睡眠情報の利用可能性を示す結果を得た.これらの結果は,転倒発生の兆候を検出する技術につながる点で学術的意義があり,転倒予防の実現の観点で社会的意義がある.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (32 results)

All 2022 2021 2020 2019

All Journal Article (12 results) (of which Peer Reviewed: 9 results,  Open Access: 2 results) Presentation (20 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] A Study on Reference Range for Detection and Evaluation of Abnormal Foot Movement during Walking in Hemiplegic Subject Using Inertial Sensors2021

    • Author(s)
      Taihei Noro, Takashi Watanabe, Katsunori Murakami and Naomi Kuge
    • Journal Title

      Converging Clinical and Engineering Research on Neurorehabilitation IV. ICNR 2020. Biosystems & Biorobotics

      Volume: 28 Pages: 109-113

    • DOI

      10.1007/978-3-030-70316-5_18

    • ISBN
      9783030703158, 9783030703165
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 慣性センサを用いたニューラルネットワークによる体重心位置推定に関する基礎検討2021

    • Author(s)
      渡邊駿典,渡邉高志
    • Journal Title

      電子情報通信学会技術研究報告

      Volume: 121 Pages: 6-9

    • Related Report
      2021 Annual Research Report
  • [Journal Article] A Study of Gait Change Detection Using LSTM Based on Inertial Sensor Measurements under Fixed Step Widths2021

    • Author(s)
      Kento Katayama, Takashi Watanabe
    • Journal Title

      Proceeding of The International Conference on Intelligent Informatics and Biomedical Sciences

      Volume: - Pages: 111-115

    • DOI

      10.1109/iciibms52876.2021.9651568

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Study on Reference Range for Detection and Evaluation of Abnormal Foot Movement during Walking in Hemiplegic Subject Using Inertial Sensors2021

    • Author(s)
      Taihei Noro, Takashi Watanabe, Katsunori Murakami and Naomi Kuge
    • Journal Title

      Converging Clinical and Engineering Research on Neurorehabilitation IV: Biosystems & Biorobotics

      Volume: 28

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 慣性センサを用いた片麻痺者歩行の足部異常運動の検出と評価の基準に関する検討2020

    • Author(s)
      野呂泰平,渡邉高志
    • Journal Title

      電子情報通信学会技術研究報告

      Volume: 120(62) Pages: 13-16

    • Related Report
      2020 Research-status Report
  • [Journal Article] 慣性センサを用いたニューラルネットワークによる歩行事象検出法 ~ 健常者での基礎的試験 ~2020

    • Author(s)
      野崎善喬,渡邉高志
    • Journal Title

      電子情報通信学会技術研究報告

      Volume: 120(111) Pages: 1-3

    • Related Report
      2020 Research-status Report
  • [Journal Article] Development of Artificial Neural Network Based Automatic Stride Length Estimation Method Using IMU: Validation Test with Healthy Subjects2020

    • Author(s)
      NOZAKI Yoshitaka、WATANABE Takashi
    • Journal Title

      IEICE Transactions on Information and Systems

      Volume: E103.D Issue: 9 Pages: 2027-2031

    • DOI

      10.1587/transinf.2019edl8227

    • NAID

      130007894625

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Average Walking Speed Estimation with an Inertial Sensor in 10-m Walk Test: A Validation Test with Healthy Subjects2020

    • Author(s)
      Watanabe Takashi
    • Journal Title

      IFMBE Proceedings

      Volume: 80 Pages: 169-177

    • DOI

      10.1007/978-3-030-64610-3_20

    • ISBN
      9783030646097, 9783030646103
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Development of Artificial Neural Network based Automatic Stride Length Estimation Method Using IMU: Validation Test with Healthy Subjects2020

    • Author(s)
      Yoshitaka NOZAKI, TakashiWATANABE
    • Journal Title

      IEICE Transactions on Information and Systems

      Volume: -

    • NAID

      130007894625

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Basic Study on Detection of Movement State in Stride by Artificial Neural Network for Estimating Stride Length of Hemiplegic Gait Using IMU2019

    • Author(s)
      Yoshitaka Nozaki, Takashi Watanabe
    • Journal Title

      Proc. 41st Ann. Int. Conf.IEEE EMBS

      Volume: - Pages: 3151-3154

    • DOI

      10.1109/embc.2019.8856352

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Study on Relationship between Walking Speed and Acceleration of Center of Mass Estimated with Inertial Sensors2019

    • Author(s)
      Takashi Watanabe, Yuho Takeda
    • Journal Title

      IFMBE Proceedings

      Volume: 76 Pages: 694-702

    • DOI

      10.1007/978-3-030-31635-8_82

    • ISBN
      9783030316341, 9783030316358
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Feasibility Test of Evaluation of Gait Movement by Using Center of Mass Estimation with Inertial Sensors2019

    • Author(s)
      Takeda Yuho, Watanabe Takashi
    • Journal Title

      IFMBE Proceedings

      Volume: 76 Pages: 718-726

    • DOI

      10.1007/978-3-030-31635-8_85

    • ISBN
      9783030316341, 9783030316358
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Center of mass position estimation during walking based on inertial measurement unit: determination of input data and its preprocessing for mapping using artificial neural network2022

    • Author(s)
      Toshinori Watanabe and Takashi Watanabe
    • Organizer
      The IUPESM World Congress on Medical Physics and Biomedical Engineering 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Study on Gait Change Detection from Reference Gait Using Prediction Error of IMU Signals: Comparison of Prediction Models2022

    • Author(s)
      Kento Katayama, Takashi Watanabe
    • Organizer
      The IUPESM World Congress on Medical Physics and Biomedical Engineering 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 基準歩行に対する慣性センサ信号の予測誤差に基づく歩容変化分類のための基礎検討2022

    • Author(s)
      片山堅斗,渡邉高志
    • Organizer
      第61回日本生体医工学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 慣性センサを用いたニューラルネットワークによる体重心位置推定に関する基礎検討2021

    • Author(s)
      渡邊駿典,渡邉高志
    • Organizer
      MEとバイオサイバネティックス研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 慣性センサを用いた歩隔変化に基づく転倒発生の兆候の検出に関する基礎的検討2021

    • Author(s)
      往蔵和希,渡邉 高志
    • Organizer
      第60回日本生体医工学会大会
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Presentation] 慣性センサを用いた片麻痺者歩行の足部異常運動の評価に関する基礎的検討2021

    • Author(s)
      野呂泰平,渡邉高志,村上克徳,久家 直巳
    • Organizer
      第60回日本生体医工学会大会
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Presentation] ANNによる慣性センサを用いた身体重心位置推定に関する基礎的検討2021

    • Author(s)
      渡邊駿典,渡邉高志
    • Organizer
      第60回日本生体医工学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] A Study of Gait Change Detection Using LSTM Based on Inertial Sensor Measurements under Fixed Step Widths2021

    • Author(s)
      Kento Katayama, Takashi Watanabe
    • Organizer
      The International Conference on Intelligent Informatics and Biomedical Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 慣性センサを用いたLSTMによる歩容変化検出に関する検討 歩隔変化による歩行での評価2021

    • Author(s)
      片山堅斗,渡邉高志
    • Organizer
      第42回バイオメカニズム学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 慣性センサを用いた片麻痺者歩行の足部異常運動の検出に関する検討2021

    • Author(s)
      野呂泰平,渡邉高志,村上克徳,久家 直巳
    • Organizer
      第54回日本生体医工学会東北支部大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 慣性センサを用いた深層学習による歩行事象検出に関する基礎的検討2020

    • Author(s)
      野崎善喬,渡邉高志
    • Organizer
      第59回日本生体医工学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 片麻痺者の転倒リスク評価における異なる指標の関連性の基礎的検討2020

    • Author(s)
      往蔵和希,渡邉 高志,村上克徳,久家直巳
    • Organizer
      第59回日本生体医工学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 慣性センサを用いた片麻痺者歩行の足部異常運動の検出と評価の基準に関する検討2020

    • Author(s)
      野呂泰平,渡邉高志
    • Organizer
      MEとバイオサイバネティックス研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 慣性センサを用いたニューラルネットワークによる歩行事象検出法 ~ 健常者での基礎的試験 ~2020

    • Author(s)
      野崎善喬,渡邉高志
    • Organizer
      MEとバイオサイバネティックス研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] A Preliminary Study on Gait Event Detection by Convolutional Neural Network using Inertial Measurement Unit2020

    • Author(s)
      Yoshitaka NOZAKI, and Takashi WATANABE
    • Organizer
      the 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Study on Reference Range for Detection and Evaluation of Abnormal Foot Movement during Walking in Hemiplegic Subject Using Inertial Sensors2020

    • Author(s)
      Taihei Noro, Takashi Watanabe, Katsunori Murakami and Naomi Kuge
    • Organizer
      the 5th International Conference on NeuroRehabilitation
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Basic Study on Detection of Movement State in Stride by Artificial Neural Network for Estimating Stride Length of Hemiplegic Gait Using IMU2019

    • Author(s)
      Yoshitaka Nozaki, Takashi Watanabe
    • Organizer
      The 41st Annual International Conference of the IEEE EMBS
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Study on Relationship between Walking Speed and Acceleration of Center of Mass Estimated with Inertial Sensors2019

    • Author(s)
      Takashi Watanabe, Yuho Takeda
    • Organizer
      The 15th Mediterranean Conference on Medical and Biological Engineering and Computing
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Feasibility Test of Evaluation of Gait Movement by Using Center of Mass Estimation with Inertial Sensors2019

    • Author(s)
      Yuho Takeda and Takashi Watanabe
    • Organizer
      The 15th Mediterranean Conference on Medical and Biological Engineering and Computing
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ANNを用いた運動機能障害者の歩容変化の評価に関する基礎的検討2019

    • Author(s)
      往蔵和希,渡邉高志
    • Organizer
      第53回日本生体医工学会東北支部大会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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