PROBLEM TO BE SOLVED: To enable blood circulation of a subject to be detected easily and accurately.SOLUTION: A blood circulation detection apparatus comprises: a measuring unit to measure a pulse wave of a subject on the basis of a received optical signal diffused in the body of the subject and received when an optical signal in a predetermined frequency band is emitted to the subject； and a blood circulation detection unit to detect blood circulation of the subject on the basis of a DC component of the received optical signal, a volume change amount of the pulse wave from a rising time of the pulse wave to a time when a first-order derivative of the pulse wave with respect to time reaches the maximum, and a first-order derivative of the volume change amount with respect to time.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】被検者の血行を簡易かつ精度よく検出できるようにする。【解決手段】血行検出装置は、被検者に所定の周波数帯域の光信号を照射したときに被検者の体内で散乱されて受光された受光信号に基づいて、前記被検者の脈波を測定する測定部と、前記受光信号の直流成分と、前記脈波の立ち上がり時刻から前記脈波を時間で１階微分した値が最大になる時刻までの前記脈波の容積変化量と、前記容積変化量を時間で１階微分した値と、に基づいて、前記被検者の血行を検出する血行検出部と、を備える。【選択図】図１
