PROBLEM TO BE SOLVED: To provide a technology that is excellent in responsiveness and amount computation, and estimates an advancing direction of a pedestrian with faulty detection small in portable type device high in degree of freedom of pose.SOLUTION: A terminal device 1 as a pedestrian observation system comprises: a level direction detection part 105 that obtains magnitude of acceleration in the horizontal plane on the basis of an acceleration component αE,αN in a horizontal plane, acquires a time in which a maximum value of the magnitude is observed, and the acceleration component αE,αN at this moment, and acquires peak information 114 a vertical direction detection part 104 that acquires a time in which a maximum value of an acceleration component αU in a vertical direction and a minimum value therein are observed and acquires the peak information 114 a peak analysis part 106 that sifts through the information on the maximum value of the magnitude, acquires peak information for estimation 116 on the basis of the peak information 114 and an advancing direction estimation part 107 that acquires advancing direction information 117 indicative of an advancing direction of the pedestrian on the basis of the peak information for estimation 116.COPYRIGHT: (C)2015,JPO&INPIT【課題】姿勢の自由度の高い、携帯型の装置において、応答性および演算量に優れ、かつ、誤検出の少ない、歩行者の進行方向を推定する技術を提供する。【解決手段】歩行者観測システムとしての端末装置1に、水平面内の加速度成分αE,αNに基づいて、水平面における加速度のパワーを求め、当該パワーの極大値を観測した時間と、そのときの加速度成分αE,αNとを取得してピーク情報114を取得する水平方向検出部105と、鉛直方向の加速度成分αUの極大値および極小値を観測した時間を取得してピーク情報114を取得する鉛直方向検出部104と、ピーク情報114に基づいて、パワーの極大値に関する情報を取捨選択して、推定用ピーク情報116を取得するピーク解析部106と、推定用ピーク情報116に基づいて、歩行者の進行方向を示す進行方向情報117を取得する進行方向推定部107とを設ける。【選択図】図3
