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    • 7. 发明申请
    • SIGNAL COMPONENT PROCESSOR
    • 信号分量处理器
    • WO2003001997A1
    • 2003-01-09
    • PCT/US2002/020674
    • 2002-06-28
    • MASIMO CORPORATION
    • WEBER, Walter, M.AL-ALI, AmmarCAZZOLI, Lorenzo
    • A61B5/00
    • A61B5/14552A61B5/024A61B5/02433A61B5/14532A61B5/1455A61B5/14551A61B5/7282
    • A signal processor generates basis functions and identifies at least one basis function component of a sensor signal in order to calculate a physiological measurement. The signal processor is advantageously applied to pulse oximetry so as to directly calculate oxygen saturation and so as to calculate a robust oxygen saturation measurement. In particular, a signal component transform may be calculated within a window around a derived pulse rate estimate. A signal component transform may also utilize sinusoidal basis functions, and an optimization of a signal component transform may occur at a particular frequency or a set of frequencies. A sinusoidal waveform or waveforms at that frequency or set of frequencies is generated to select associated red and infrared components of the sensor signal, and an oxygen saturation is calculated from a magnitude ratio of these components.
    • 信号处理器生成基函数并且识别传感器信号的至少一个基函数分量以便计算生理测量。 信号处理器有利地应用于脉搏血氧饱和度,以便直接计算氧饱和度,以便计算鲁棒的氧饱和度测量。 特别地,可以在围绕导出的脉冲率估计的窗口内计算信号分量变换。 信号分量变换还可以利用正弦基函数,并且可以在特定频率或一组频率处发生信号分量变换的优化。 产生在该频率或频率组中的正弦波形或波形以选择传感器信号的相关红色和红外分量,并且根据这些分量的幅度比计算氧饱和度。