Study on the Phase Shift Error of the Dynamic Spectrum
WANG Yan1,2,LI Gang1*,LIN Ling1,LIU Yu-liang1
1. College of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China 2. Liaoning Technical University,Fuxin 123000，China
Abstract：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.
王焱1,2,李刚1*,林凌1,刘玉良1. 动态光谱检测中的相移波形误差分析[J]. 光谱学与光谱分析, 2007, 27(08): 1506-1509.
WANG Yan1,2,LI Gang1*,LIN Ling1,LIU Yu-liang1. Study on the Phase Shift Error of the Dynamic Spectrum. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(08): 1506-1509.
