PROBLEM TO BE SOLVED: To provide a bed-leaving detection device with high reliability and excellent durability capable of detecting a care-receiver in a non-contact manner in spite of its low cost.SOLUTION: A bed-leaving detection device includes detection means for detecting a care-receiver in a monitoring object space in a non-contact manner with a bed and its periphery as a monitoring object space, and a control part for determining whether or not the care-receiver has left the bed based on a detection signal output from detection means. The bed-leaving detection device uses a luminance distribution sensor 11 as the detection means, which includes a line sensor 110 having a plurality of light receiving elements arranged in a line and a rod lens 120. The rod lens 120 is disposed in a direction orthogonal to the line sensor 110 at a position away from a light-receiving surface side of the line sensor 110 by the focal distance.SELECTED DRAWING: Figure 2【課題】低コストでありながら、被介護者を非接触で検知し得る信頼性が高く耐久性もよい離床検知装置を提供する。【解決手段】ベッドおよびその周辺を監視対象空間として、上記監視対象空間内の被介護者を非接触で検知する検知手段と、上記検知手段から出力される検知信号に基づいて上記被介護者の離床の有無を判定する制御部とを備えている離床検知装置において、上記検知手段として、一列に並べられた複数の受光素子を有するラインセンサ１１０とロッドレンズ１２０とを含み、上記ロッドレンズ１２０が上記ラインセンサ１１０の受光面側からその焦点距離分離れた位置で上記ラインセンサ１１０と直交する方向に配置されている輝度分布センサ１１を用いる。【選択図】図２
