PROBLEM TO BE SOLVED: To observe the loaded condition of muscles during various actions by estimating the fine vibration component of the muscles during an action having the high degree of freedom by calculating data obtained from a sensor which can be mounted in a noninvasive and simple manner.SOLUTION: An action condition estimating device 100A for estimating the condition of an action from a signal measured by a vibration detection sensor mounted to a subject includes: a frequency band statistics-calculating unit 130 which performs frequency conversion of a signal measured by the vibration detection sensor and calculates statistics from a predetermined frequency band among frequency components obtained by the frequency conversion and an action condition component-calculating unit 140 which estimates the condition of the action of the subject according to the statistics.COPYRIGHT: (C)2011,JPO&INPIT【課題】自由度の高い行動中の筋肉の微細な振動成分を、非侵襲的で簡便に装着できるセンサから得られるデータを演算することで推定可能にし、様々な行動中の筋肉の負荷状態などを観測できるようにする。【解決手段】被験者に装着された振動検知センサによって測定された信号から行動状態を推定する行動状態推定装置100Aは、振動検知センサによって測定された信号を周波数変換し、周波数変換して得られた周波数成分のうち所定の周波数バンドから統計量を求める周波数バンド統計量演算部130と、統計量に基づき被験者の行動状態を推定する行動状態成分演算部140と、を備えることを特徴とする。【選択図】図2
