Based On The Msp430 Development Of Arterial Oxygen Module

In this paper, a measuring system of pulse oxygen saturaction, which is based on the Lambert-Beer Principle is presented. That is called photoelectric method. This method which utilizes an optical sensor is applied universally. Our item choiced MSP430F149, a sort of singlechip as controller, designed our hardware electrocircuit to get the pulse wave singnal,and used MSP430F149 to continuously search and calculate the Peak-Peak value of the pulse wave,and compute oxygen saturaction .In our study ,in order to hurdle the dirft of baseline caused by the physiological difference of human bodies .we designed one circuit which can automatically regulate of the baseline of signal. For the sake of meeting the special demand of continuous clinical physiological monitoring and settling the matter of signal's saturation, two circuits and appropriate algorithms are designed, one circuit is a controlled integral circuit which automatically regulates the amplitude of waveforms, another circuit is a base intercept circuit which automatically cuts partial the value of direct current. In addition, we try to process the pluse wave with LMS adaptive filtering and independence component analysis (ICA), and gain perfect result.This item is one of pivotal functional modules in PTCA monitoring device. Our work consummates the whole system's function.