PROBLEM TO BE SOLVED: To provide a pulse wave processing technique capable of sorting out pulse wave signals to be used as data in accordance with the extent of influence of waveform disturbances due to body movement.SOLUTION: A pulse wave interval detection part 103 samples a pulse wave signal outputted by a pulse wave measurement part 101 and detects pulse wave intervals. A correlation coefficient calculation part 106 determines a use range of the pulse waves to be used for calculating a correlation coefficient on the basis of the pulse wave interval detected by the pulse wave interval detection part 103, uses a pulse wave signal showing pulse waves within the use range and a body movement signal showing the body movement measured by a body movement measurement part 102 almost at the same time of day as a time of day when the pulse waves within the use range are measured, and calculates a correlation coefficient time serially. A pulse wave elimination part 107 eliminates pulse wave interval data when the correlation coefficient calculated by the correlation coefficient calculation part 106 is equal to or larger than a first threshold and adapts pulse wave interval data when the correlation coefficient is smaller than the first threshold.COPYRIGHT: (C)2009,JPO&INPIT【課題】体動による波形の乱れの影響の大きさに応じて、データとして用いる脈波信号を取捨選択可能な脈波処理技術を提供する。【解決手段】脈波間隔検出部103は、脈波計測部101が出力した脈波信号をサンプリングして脈拍間隔を検出する。相関係数算出部106は、脈波間隔検出部103が検出した脈波間隔に基づいて、相関係数の算出に用いる脈波の使用範囲を決定し、当該使用範囲にある脈波を表す脈波信号と、当該使用範囲にある脈波が計測された時刻と略同時刻に体動計測部102が計測した体動を表す体動信号とを用いて、相関係数を時系列に算出する。脈波波形除去部107は、相関係数算出部106が算出した相関係数が第1閾値以上である場合の脈波間隔データを除去し、当該相関係数が第1閾値より低い場合の脈波間隔データを採用する。【選択図】図1
