PROBLEM TO BE SOLVED: To provide a pulse wave detection device capable of surely measuring a pulse wave with high accuracy in a simple configuration.SOLUTION: A CPU calculates the amplitude of a pulse wave waveform on the basis of the intensity of reflected light of light irradiated to a subject (S1). In the case where the amplitude of the pulse wave waveform is less than a prescribed value (S2: NO), the CPU makes a detection part come close to the subject to change the detection sensitivity of the pulse wave (S3). The CPU calculates amplitude again (S5), and if being less than the prescribed value (S7: NO) in the case where the amplitude increases (S6: YES), the CPU repeats processing for making the detection part come closer to the subject (S7 to S10). If the amplitude is equal to or more than the prescribed value (S7: YES), the CPU measures a pulse wave (S15) to acquire biological information (S16). On the other hand, if the amplitude does not increase even though the detection part is made to come close to the subject (S6: NO), the CPU repeats processing for making the detection come far from the subject (S11 to S13). When the amplitude is equal to or more than the prescribed value (S13: YES), the CPU acquires biological information (S16).COPYRIGHT: (C)2016,JPO&INPIT【課題】簡易な構成で精度よく確実に脈波を測定できる脈波検出装置を提供する。【解決手段】CPUは被検体に照射した光の反射光の強度に基づき、脈波波形の振幅を求める(S1)。CPUは脈波波形の振幅が所定値未満の場合(S2:NO)、検出部を被検体に近づけ、脈波の検出感度を変更する(S3)。CPUは再度振幅を求め(S5)、振幅が増加した場合(S6:YES)、所定値未満なら(S7:NO)、検出部をさらに被検体に近づける処理を繰り返す(S7~S10)。振幅が所定値以上となれば(S7:YES)、脈波を計測して(S15)、生体情報を求める(S16)。一方、検出部を被検体に近づけても振幅が増加なかった場合(S6:NO)、CPUは検出部を被検体から遠ざける処理を繰り返す(S11~S13)。振幅が所定値以上となれば(S13:YES)、生体情報を求める(S16)。【選択図】図5
