PROBLEM TO BE SOLVED: To permit an abnormality of a pulse wave due to a body movement to be accurately and efficiently detected and to permit the measurement condition of a person to be measured to be determined.SOLUTION: An in-pressurization maximum pulse wave differential amplitude detection unit 13 detects a maximum pulse wave differential amplitude by differentiating the output signal of a pressure sensor 4 while pressure in a cuff 1 is increased by a pressurization unit 2, and an in-depressurization pulse wave differential amplitude detection unit 15 detects a pulse wave differential amplitude by differentiating the output signal of the pressure sensor 4 while the pressure in the cuff 1 is decreased by a depressurization unit 3. A body movement detection unit 16 compares the pulse wave differential amplitude with a value obtained by multiplying the maximum pulse wave differential amplitude by a prescribed number and detects the pulse wave differential amplitude as a body movement when the differential amplitude is equal to or higher than the value and decides that there is an abnormality in the condition of the person to be measured during measurement.COPYRIGHT: (C)2012,JPO&INPIT【課題】体動による脈波の異常を正確かつ効率よく検出し、被測定者の測定状態を判定できるようにする。【解決手段】カフ1内の圧力を加圧手段2により加圧中に、加圧中最大脈波微分振幅検出手段13が圧力センサ4の出力信号を微分して最大脈波微分振幅を検出し、上記カフ1内の圧力を減圧手段3によって減圧中に、減圧中脈波微分振幅検出手段15が圧力センサ4の出力信号を微分して脈波微分振幅を検出する。そして、体動検出手段16がその脈波微分振幅を最大脈波微分振幅を所定倍した値と比較して、その値以上であったときに体動として検出し、測定中の被測定者の状態に異常があったと判定する。【選択図】 図1
