PROBLEM TO BE SOLVED: To quickly measure pulse waves with low power consumption.SOLUTION: A pulse wave measuring instrument includes a storage unit and a subtracter. The storage unit stores a value of a first digital signal showing an output state of a light-receiving element for receiving light transmitted through or reflected from the interior of the body at a timing of a lighting state in which light is emitted toward the interior of the body, and a value of a second digital signal showing an output state of the light-receiving element at a timing of a non-lit state in which the light is not emitted when the light-emitting element is alternately switched between the lit state and the non-lit state. The subtracter subtracts the value of the second digital signal stored in the storage unit from the value of the first digital signal stored in the storage unit.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】迅速かつ低消費電力で脈波を計測する【解決手段】実施形態によれば、脈波計測装置は、記憶部と、減算器と、を備える。前記記憶部は、発光素子が、体内に向かって光を照射する点灯状態と、前記光を照射しない非点灯状態と、に交互に切り替わっているときに、前記体内を透過または反射した光を受光するための受光素子の、前記点灯状態のタイミングにおける出力状態を示す第1のデジタル信号の値と、前記受光素子の、前記非点灯状態のタイミングにおける出力状態を示す第2のデジタル信号の値と、を記憶する。前記減算器は、前記記憶部に記憶された前記第1のデジタル信号の値から前記記憶部に記憶された前記第2のデジタル信号の値を減算する。【選択図】図1
