PROBLEM TO BE SOLVED: To provide an on-bed state monitoring system capable of more reliably determining whether or not there are chances of a subject falling down.SOLUTION: An on-bed state monitoring system for monitoring an on-bed state of a subject on a bed comprises: a plurality of load detectors provide on the bed or beneath the legs of the bed for detecting a load due to the subject a center-of-gravity position calculation unit for determining the position of the center of gravity of the subject, based on the load due to the subject a body axis direction determination unit for determining the direction in which the subjects body axis extends, based on changes in the load due to the subject according to the respiration and/or heart rate of the subject and an on-bed state determination unit for determining a state of the subject on the bed, based on the position of the center of gravity of the subject and the direction in which the subjects body axis extends.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】被験者の転落可能性の有無を、より確実に判定することのできる在床状態モニタリングシステムを提供する。【解決手段】ベッド上の被験者の在床状態をモニターする在床状態モニタリングシステムは、ベッド又はベッドの脚下に設けられ、被験者による荷重を検出する複数の荷重検出器と、前記被験者による荷重に基づき被験者の重心の位置を求める重心位置算出部と、前記被験者による荷重の被験者の呼吸及び/又は心拍に応じた変化に基づいて被験者の体軸の延びる方向を求める体軸方向決定部と、前記被験者の重心の位置及び前記被験者の体軸の延びる方向に基づいて、被験者の前記ベッド上での状態を判定する在床状態判定部とを備える。【選択図】図1
