The Pick-up Of The Dynamic Spectrum And Its Precision Accuracy Analyse

The development of near-infrared-based techniques for the noninvasive concentration measurements of blood components has attracted significant interest in recent years. The realization of this method will replace the traditional invasive method. It will release the pain of many patients. But it is very difficult to use this technology to the clinic, for the near infrared spectrum is disturbed by many factors, and the precision of the final result is restricted. In the NIR non-invasive detection, it is very hard to measure the influence of the individual to the spectrum, so it is the key of the NIR non-invasive detection whether it can eliminate the influence of the skin and other tissues. In this dissertation, a new method–Dynamic Spectrum is introduced, which is distinguished from the traditional ones. This method can eliminate the influence of the skin and other tissues:In this dissertation, a series of research is taken which focus on the pick-up of the dynamic spectrum and its measuring accuracy(1) In this dissertation, the dynamic spectrum method and the traditional method will be discussed from their definitions and principles. Then we find the error reasons producing in the traditional method and the dynamic spectrum method's eliminating to these influences. Finally, the result can be proved that by the dynamic spectrum, we can improve the measuring accuracy of the noninvasive blood components measurement in theory.(2) In this dissertation, the best experiment condition by which to extract the Dynamic Spectrum is discussed, it is discussed from the measurement position, integrate time, the contact press and the superficial condition respectively.(3) In this dissertation, the approach of the Dynamic Spectrum was proposed, but Because of the noise and the resolution of the spectrometer, the Dynamic Spectrum is very difficult to get from the time domain. Then the Dynamic Spectrum in the frequency domain is introduced, The...