中文摘要：

动态光谱提取自光电容积脉搏波,是与动脉血液信息高度相关的近红外光谱,可应用于动脉血液成分的无创检测,具有很好的临床应用价值。文章依据动态光谱检测理论,对检测过程中的相移波形误差进行了分析。人体正常生理活动可导致光电容积脉搏波的周期、幅值和基线的不稳定。同时在动态光谱时域检测过程中,不同波长下检测到的脉搏波间存在一定的相位延迟。以上两个因素将导致不同波长对应的脉搏波之间存在一定的波形差异,从而使其频谱发生改变,在动态光谱中引入相移波形误差。文章对该相移波形误差进行了量化分析。结果表明,该误差与截取脉搏周期的矩形窗位置相关。通过精选矩形窗位置,可以将相移波形误差降低一个数量级。

英文摘要：

Dynamic spectrum （DS） is a kind of NI spectrum extracted from the photo-electric pulse wave and closely relative to the article blood. It can be used in a non-invasive blood component concentration examination decision. In the present paper, the phase shift error （PSE） in the DS detection is analyzed based on the measure theory of DS. Firstly, the physiological activity of human being results in the instability of the period, amplitude and the base line of pulse wave. Secondly, there is a phase shift between different pulse waves at different wavelengths during the detection in time domain. These two factors lead to the difference among different pulse waves, and introduce the PSE into DS. The PSE of DS among different pulse waves is also discussed quantitatively. The result showed that PSE is correlated with the position of the rectangle window that intercepts pulses from the wave, and can be minimized into about 10% by selecting the start points of the windows.