PROBLEM TO BE SOLVED: To provide a pulse rate specifying method constituted so as to prevent frequency to be set in pulsation from being overlooked.SOLUTION: The pulse photometer includes: a frequency spectrum conversion part 10a for obtaining the frequency L and amplitude A in all of the peaks of a frequency spectrum from the frequency spectrum of a measured signal a frequency correlation degree calculation part 10b for calculating a frequency correlation degree Id at every peak from the difference between the frequency L in all of the peaks of the frequency spectrum and the preceding pulsation frequency Lo being the frequency of pulsation immediately before a predetermined time zone an amplitude correlation degree calculation part 10c for calculating an amplitude correlation degree (a) at every peak from the amplitude A in all of the peaks of the frequency spectrum a synthetic correlation degree calculation part 10d for calculating a synthetic correlation degree Dis at every peak from the frequency correlation degree Id at every peak and the amplitude correlation degree (a) at every peak and a pulse rate specifying part 10e for specifying the frequency of a peak becoming maximum in the synthetic correlation degree Dis as the pulse rate M(t) of the predetermined time zone. The frequency of the specified pulse rate is set to the preceding pulsation frequency Lo of the next time.COPYRIGHT: (C)2012,JPO&INPIT【課題】脈拍とすべき周波数が見落とされることが無い脈拍数特定方法を提供すること。【解決手段】測定された信号の周波数スペクトルから、周波数スペクトルの全てのピークにおける周波数Lと振幅Aとを得る周波数スペクトル変換部10aと、周波数スペクトルの全てのピークにおける周波数Lと、所定の時間帯の直前の脈拍の周波数である前回脈拍周波数Loとの差分からピーク毎の周波数相関度ldを算出する周波数相関度算出部10bと、周波数スペクトルの全てのピークにおける振幅Aからピーク毎の振幅相関度aを算出する振幅相関度算出部10cと、ピーク毎の周波数相関度ldとピーク毎の振幅相関度aからピーク毎の総合相関度Disを算出する総合相関度算出部10dと、総合相関度Disが最大となるピークの周波数を所定の時間帯の脈拍数M(t)と特定する脈拍数特定部10eとを有し、特定された脈拍数の周波数を次回の前回脈拍周波数Loとする。【選択図】図2
