Development of individual adaptive sit-to-stand assistance system based on muscle activity using measurement wear

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K20743
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 90150:Medical assistive technology-related
• Research Institution: Osaka Institute of Technology
• Principal Investigator: Inoue Tsuyoshi 大阪工業大学, ロボティクス&デザイン工学部, 准教授 (00823527)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 起立動作支援 / 筋電位 / 体幹前傾角 / 動作予測

Outline of Final Research Achievements

In this study, we aimed to realize a sit-to-stand movement support system that can prevent muscle weakness due to support. First, to realize seat control according to the individual's standing speed, we proposed a method to predict the standing speed before the buttocks leave the seat surface using the measurement results of the forward trunk inclination angle and lower limb electromyogram. We developed a sit-to-stand assistance system and confirmed the effectiveness of the proposed method using this system. Next, we confirmed that the system can control muscle activity during standing movements by changing the assistance speed and angle. Furthermore, we confirmed that the system can detect excessive assistance based on the results of lower limb electromyogram measurements.

Free Research Field

ヒューマンインタフェース・生体計測工学

Academic Significance and Societal Importance of the Research Achievements

本研究では，従来の起立動作システムにおける過度な支援による筋力低下を防ぐことが可能な支援システムの実現を目指した．研究成果により，筋電位と体幹前傾角度の計測結果を用いることで，利用者の起立動作に合わせて座面を駆動するとともに，利用者の筋活動をコントロール可能であることを評価システムの構築及び評価実験により確認した．本研究の結果より，動作の支援が重要となる高齢化社会において，従来の楽に立ち上がれればよいという支援から必要な筋力をなるべく保つような支援の実現が示唆された．