PROBLEM TO BE SOLVED: To provide a technique that enables stable extraction of an AC component regardless of a measurement part.SOLUTION: A pulse wave signal processing device has a first light reception unit that receives a reflected light of light emitted from a light emission part that emits light toward the measurement part, where pulse waves are measured, and outputs a first signal according to an amount of the received light, and a second light reception unit that receives the reflected light of the light emitted from the light emission part and outputs a second signal according to the amount of the received light. Each of the first light reception unit and the second light reception unit is provided at a position where a ratio between the AC component and a DC component contained in the second signal is smaller than the ratio between these components contained in the first signal. A light reception amount of each of the first light reception unit and the second light reception unit is adjusted so as to satisfy a condition for the DC component of the second signal to have magnitude equal to or smaller than magnitude of the DC component of the first signal. An amplification unit amplifies a differential signal (l3) between a first signal (l1) outputted from the first light reception part and a second signal (l2) outputted from the second light reception part, and outputs the AC component.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】測定部位に関わらず交流成分を安定して抽出することができる技術を提供する。【解決手段】脈波信号処理装置は、脈波を測定する測定部位に光を発する発光部から発した光の反射光を受光して受光量に応じた第1信号を出力する第1受光部と、発光部から発した光の反射光を受光して受光量に応じた第2信号を出力する第2受光部とを有し、第1受光部と第2受光部は、前記第2信号に含まれる交流成分と直流成分との比率が前記第1信号の前記比率よりも小さくなる位置に設けられ、前記第2信号の直流成分が前記第1信号の直流成分の大きさ以下となる条件を満たすように受光量が調整されている。増幅部は、第1受光部から出力される第1信号(I1)と第2受光部から出力される第2信号(I2)との差分信号(I3)を増幅して交流成分を出力する。【選択図】図2
