PROBLEM TO BE SOLVED: To increase the accuracy of determination of similarity of waveforms.SOLUTION: A pulse wave detector 10 calculates a coefficient of correlation in which a value becomes smaller toward an increase in a difference between dispersion of an amplitude value within a first window and dispersion of an amplitude value within a second window, between a waveform of a signal included in the first window with a predetermined time width and a waveform of a signal included in the second window, compared with the waveform within the first window.COPYRIGHT: (C)2014,JPO&INPIT【課題】波形の類似性の判定精度を向上させること。【解決手段】脈波検出装置10は、所定の時間幅を持つ第1の窓に含まれる信号の波形と、第1の窓内の波形と比較する第2の窓に含まれる信号の波形との間で、第1の窓内の振幅値の分散と第2の窓内の振幅値の分散との差が大きくなるにしたがって値が小さくなる相関係数を算出する。【選択図】図1
