PROBLEM TO BE SOLVED: To provide a human posture motion discrimination device with which what state a subject is in among walking, running, lying prone, sitting, and standing states can be discriminated.SOLUTION: A gravitational acceleration meter with X, Y, and Z axes is worn on a person so that the X-axis is in the front-rear direction of the body, the Y-axis in the right-left direction, and the Z axis in the upper-lower direction, and then the human posture motion discrimination device discriminates which state the person is in. The human posture motion discrimination device includes: (A) a means to analyze the frequency spectrum of acceleration GZ in the upper-lower direction to calculate the peak value SZ of spectrum power (B) a means to calculate the posture component GSZ that is the moving average of acceleration GZ in the upper-lower direction (C) a means to compare SZ with a predetermined threshold value to discriminate the dynamic state and the static state (D) a means to compare SZ with a predetermined threshold value to discriminate the running state and the walking state (E) a means to discriminate the lying prone state when GSZ is smaller than a predetermined threshold value and the sitting or standing state when not smaller and (F) a means to compare SZ with a predetermined threshold value to discriminate the sitting state and the standing state.COPYRIGHT: (C)2010,JPO&INPIT【課題】被験者が歩行、走行、臥位、座位、立位のいずれの状態にあるのかを判別できる人の姿勢動作判別装置を提供すること。【解決手段】X軸、Y軸、Z軸を備える重力加速度計をX軸が体の前後方向、Y軸が左右方向、Z軸が上下方向となるように装着して、その人がいずれの状態にあるのかを判別する姿勢動作判別装置において、(A)上下方向の加速度GZの周波数スペクトルを解析してスペクトルパワーのピーク値SZを演算する手段、(B)上下方向の加速度GZの移動平均値である姿勢成分GSZを演算する手段、(C)SZを予め定めた閾値と比較して動的状態と静的状態とを判別する手段、(D)SZを予め定めた閾値と比較して走行と歩行とを判別する手段、(E)GSZが予め定めた閾値より小なるときは臥位と、否のときは座位または立位と判別する手段、(F)SZを予め定めた閾値と比較して座位と立位とを判別する手段を備える人の姿勢動作判別装置。【選択図】図1