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    • 4. 发明公开
    • PULSE WAVE DETECTOR AND PULSIMETER
    • 脉冲波探测器和脉冲仪
    • EP0922433A1
    • 1999-06-16
    • EP98907274.9
    • 1998-03-17
    • SEIKO EPSON CORPORATIONSeiko Instruments Inc.
    • KOSUDA, Tsukasa, Seiko Epson CorporationNAKAMURA, Chiaki, Seiko Instruments Inc.
    • A61B5/0245
    • A61B5/721A61B5/024A61B5/02427A61B5/02438A61B5/02455A61B5/7257
    • The present invention relates to a pulse wave detecting device for detecting pulse waves, and to a pulse measurer employing this pulse wave detecting device. The present invention addresses the problem of obtaining a pulse wave signal in which the noise components have been suitably removed from a pulse waveform, and of determining the pulse rate with high accuracy based on this pulse wave signal.
      The method for deriving the pulse wave signal and pulse rate is as follows.
      The pulse wave signal from pulse wave detecting sensor unit (30) is temporarily stored in buffer (503). When impulse noise is detected in the pulse wave signal in buffer (503) by impulse noise detecting means (505), the pass band for first digital filter (506) becomes a hill-shaped curve centered on the frequency corresponding to the preceding pulse rate, and impulse noise in the pulse wave signal output from buffer (503) is decreased. Thereafter, overall noise and body movement components are decreased in the pulse wave signal by means of second digital filter (507) and third digital filter (508). The signal is then subjected to frequency analysis by frequency analyzer (509), and the pulse rate is calculated from the results of this analysis.
    • 本发明涉及用于检测脉搏波的脉搏波检测装置和使用该脉搏波检测装置的脉搏测量器。 本发明解决了获得脉搏波信号的问题,在该脉搏波信号中,已经从脉搏波形中适当地去除了噪声成分,并且基于该脉搏波信号以高精度确定了脉搏率。 推导脉搏波信号和脉搏率的方法如下。 来自脉波检测传感器单元(30)的脉波信号暂时存储在缓冲器(503)中。 当通过脉冲噪声检测装置(505)在缓冲器(503)中的脉搏波信号中检测到脉冲噪声时,第一数字滤波器(506)的通带变成以对应于前一脉率的频率为中心的山形曲线 并且从缓冲器(503)输出的脉搏波信号中的脉冲噪声减小。 之后,通过第二数字滤波器(507)和第三数字滤波器(508),脉波信号中的整体噪声和身体运动分量减少。 然后通过频率分析器(509)对信号进行频率分析,并且从该分析的结果计算脉率。