PROBLEM TO BE SOLVED: To achieve downsizing and weight reduction to a level at which a body weight estimation system can be carried in a pocket, etc., and to enable a body weight to be measured easily anytime without the need for a subject to step on a scale.SOLUTION: The present invention acquires, from time-series acceleration data measured by an acceleration sensor, a time Δt from when a subject starts going down a step to when the subject finishes going down, an impact acceleration G0 at the time when the subject has finished going down the step, and a time T0 from the moment when the subject has finished going down the step to when the acceleration converges, as information at time when the subject went down the step, and calculated an estimated value m of the body weight of the subject on the basis of the acquired information at time when the subject went down the step.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】ポケット等に入れて持ち運べる程度まで小型・軽量化する。被験者が体重計に乗ることなく、いつでも簡易に体重を計測できるようにする。【解決手段】加速度センサによって測定された時系列の加速度データから、被験者が段差を降りた際の情報として、被験者が段差を降り始めてから降り終わるまでの時間Δtと、被験者が段差を降り終わった時の衝撃加速度G0と、被験者が段差を降り終わった瞬間から加速度が収束するまでの時間T0とを取得し、この取得した被験者が段差を降りた際の情報に基づいて被験者の体重の推定値m’を算出する。【選択図】 図3
