PROBLEM TO BE SOLVED: To provide a seat-leaving monitoring device for a wheelchair using an electrostatic capacitance type mat sensor as a seat-leaving sensor that can reduce power consumption of a battery power source as much as possible.SOLUTION: A seat-leaving monitoring device for a wheelchair includes: an electrostatic capacitance type mat sensor 30 arranged on a seating surface of a wheelchair a battery power source 44 for supplying power to the mat sensor 30 switch means SW1 connected between the mat sensor 30 and the battery power source 44 and a care-giver absence detection means for detecting an absence time when a care-giver who attends on a care-receiver leaves the wheelchair by a prescribed distance or more. When the care-giver is present within the prescribed distance from the wheelchair, the care-giver absence detection means turns the switch means SW1 off, and stops power supply from the battery power source 44 to the mat sensor 30, bringing the mat sensor 30 into a non-detection state, and when the care-giver is absent away from the wheelchair by the prescribed distance or more, the care-giver absence detection means turns the switch means SW1 on, and supplies power to the mat sensor 30 from the battery power source 44, bringing the mat sensor 30 into a detection state.COPYRIGHT: (C)2015,JPO&INPIT【課題】離席センサとして静電容量式のマットセンサを用いた車椅子用離席監視装置において、電池電源の消費電力を極力少なくする。【解決手段】車椅子の座面に配置された静電容量式のマットセンサ30と、マットセンサ30に電力を供給する電池電源44と、マットセンサ30と電池電源44との間に接続されたスイッチ手段SW1と、被介助者に付き添いの介助者が車椅子から所定距離以上離れた不在時を検知する介助者不在検知手段とを含み、介助者不在検知手段は、介助者が車椅子から上記所定距離未満内に存在する在時には、スイッチ手段SW1をオフとして電池電源44からマットセンサ30への給電を停止してマットセンサ30を非検知状態とし、介助者が車椅子から所定距離以上離れた不在時には、スイッチ手段SW1をオンとして電池電源44からマットセンサ30に給電してマットセンサ30を検知状態とする。【選択図】図4
