A-19 入浴姿勢における浴槽壁面反力の推定アルゴリズムの構築(映像分析,推定,構造)

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  • 藤井 隆直
    東京工業大学大学院情報理工学研究科情報環境学専攻
  • 鎌田 彩花
    東京工業大学:(現)東京大学大学院
  • 中村 遼太
    TOTO株式会社総合研究所商品研究部健康技術研究グループ
  • 加藤 智久
    TOTO株式会社総合研究所商品研究部健康技術研究グループ
  • 中島 求
    東京工業大学

書誌事項

タイトル別名
  • A-19 Construction of an Algorithm to Estimate Reaction Force from Bathtub in Bathing Postures

抄録

In order to improve comfort in bathing, the relationship between the biomechanical load and the bathtub shape has to be clarified. For this purpose, many bathing experiments had to be conducted since it was necessary to measure the reaction forces acting on a human from the bathtub experimentally. The objective of this study was to construct an algorithm to estimate reaction forces from bathtun in order to calculate joint torque as biomechanical loads without bathing experiments. This algorithm calculates distribution of reaction forces which minimizes weighted summation of i) sum of squares of reaction forces, ii) joint torques of hip and knee joints and iii) friction force of the back, considering gravity, buoyancy and passive elastic joint torque. Weighting were expressed as a function of bathing posture including parameters determined for each person to reflect influence of differences among the individual. In order to examine this algorithm, a bathing experiment to obtain the data of bathing posture and reaction forces for 10 subjects and 24 posture conditions was conducted. It was found that the estimated reaction forces were consistent well with the measured values.

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