PROBLEM TO BE SOLVED: To provide a pulse measuring apparatus achieving enhanced precision of detecting a pulse in a situation where extraneous light is not received and a reduction in the number of light emitting elements and light receiving elements.SOLUTION: The pulse measuring apparatus is equipped with a light emitting elements 21 for emitting light at a prescribed time interval, a light receiving elements 22 which receive the light through a living body and receive the extraneous light by interlocking with body movements of the living body, both a band-pass filter part 52 for extracting a first signal component in a range of a first frequency corresponding to the time interval and a low-pass filter part 53 for extracting a second signal component in a range of a second frequency lower than a frequency of a pulsation from light receiving signals outputted by the light receiving elements 22, an arithmetic processing part 60 for performing a frequency analysis on the first and second signal components to specify a body movement spectrum, and a quasi-extraneous light emitting part 25 for emitting quasi-extraneous light when the body movement spectrum is not specified. A pulse rate is specified from the frequency of the frequency spectrum excluding the body movement spectrum out of the frequency spectra contained in the first signal component when the body movement spectrum is specified.COPYRIGHT: (C)2008,JPO&INPIT【課題】外光を受光不能な状況でも脈拍検出精度が高く、かつ、発光素子及び受光素子の数を低減する。【解決手段】所定の時間間隔で光を照射する発光素子21と、その光を生体を介して受光可能で、かつ、生体の体動に連動して外光を受光可能な受光素子22と、受光素子22が出力する受光信号から、上記時間間隔に対応する周波数を含む第1周波数範囲の第1信号成分を抽出する帯域通過フィルタ部52と、脈動の周波数より低い第2周波数範囲の第2信号成分を抽出する低域通過フィルタ部53と、第1信号成分及び第2信号成分に周波数解析を施して体動スペクトルを特定する演算処理部60と、体動スペクトルを特定できない場合に、疑似外光を照射する疑似外光照射部25とを備え、体動スペクトルを特定した場合に、第1信号成分に含まれる周波数スペクトルのうち体動スペクトルを除く周波数スペクトルの周波数に基づいて脈拍数を特定する。【選択図】図3
