數(shù)字式脈搏血氧儀設(shè)計(jì)

1、 畢業(yè)設(shè)計(jì)(論 文) 數(shù)字式脈搏血氧儀設(shè)計(jì) 系 別 自 動(dòng) 化 工 程 系 專 業(yè) 生 物 醫(yī) 學(xué) 工 程 班 級(jí) 50616 姓 名 常 衍 春 指導(dǎo)教師 賀 忠 海 2010 年 6 月 10 日Digital pulse oximeter design Author：Chang Yanchun Tutor：He Zhonghai ABSTRACT Pulse oximetry is a

2、 reliable,arterial,noninvasive easy continuously determiningoxygen saturation to use means in virtually of any setting.Because there are stillseveral drawbacks in the design of the pulse oximetry system and its signal pr

3、ocessing, thesystem needs improving in accuracy,repetition and stability.This system is proposed based on dynamic spectroscopy measuring principle, and in this principle, under the guidance of a set of digital pulse oxim

4、etry test system. System adopts digital chip design to improve the system stability and repeatability. System using digital filter and digital demodulation method, using photoelectric pulse wave signal extracted by softw

5、are. And with dynamic spectroscopy, based on the principle of the algorithm is deduced, the pulse of the high-precision measurements oxygen saturation.This subject mainly embodies the innovation and work in the following

6、 respects: First,the measuring principle of the pulse oximeter is based on traditional testmethod.Its accuracy is not gratifying due to various factors influencing themeasurement result,such as the principle,measuring co

7、ndition and individualdiscrepancy.In this system a new pulse oximetry based on dynamic spectroscopy(DS)is introduced,it can promote the accuracy of the pulse oximeter evidently.Thedynamic spectroscopy method is able to e

8、liminate the interference of the individualdiscrepancy and measuring condition in principle.This new method can eliminate themeasurement error of pulse oximetry theoretically. Secondly the pulse of the traditional testin

9、g system of oxygen saturation because of complex analog caused poor stability of the system, this system puts forward the design thought according to the digitization of dynamic spectroscopy measurement principle adopts

10、modern microprocessor, integrated circuit technology, the design of the pulse wave signal detection and collection system. We use the microprocessor driven directly by certain wavelengths of light emitting diode; receivi

11、ng tube will receive light signals into electrical signals, high frequency converter by the direct current, pulse wave signal carry photoelectric instead of digital signal, the hardware circuit and AC drive circuit sourc