基于反射式检测方法的血氧测量研究
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摘要
因透射式光电脉搏波检测方法受测量部位的限制,不能对额头、腹部等进行检测。为实现对人体生理参数低生理、心理负荷及无创的采集,提出一种基于反射式检测方法的血氧检测系统的设计方法,首先结合反射式传感器DCM03和血氧模拟前端AFE4490采集指尖脉搏信号,然后将采集到的光电脉搏波进行数字信号处理以提高信噪比,最后通过判定脉搏信号极值点获取包络线,求得信号交直流分量以进行血氧值计算。实验结果表明,真值与测值间的相对误差在3%以内,该方法能实时有效地对人体血氧进行检测,对患者监护及远程诊断有极大意义。
Limited by measuring position,transmitted method cannot be used for occasion just like forehead and abdomen etc. To measure blood oxygen with low-physical and mental load,a method based on reflected detection was proposed in this paper. Firstly,fingertip pulse signal was collected by reflectance sensor DCM03 and blood oxygen analog front end AFE4490,and then digital signal processing was conducted to improve signal-noise ratio( SNR). Lastly,extreme point was determined to obtain signal envelope,AC and DC component were obtained to estimate blood oxygen value. The experiment verifies that the relative error between true values and measured values is within 3%,the method can extract blood oxygen effectively and instantly,it is a great significance for patient monitoring and remote diagnosis.
Limited by measuring position,transmitted method cannot be used for occasion just like forehead and abdomen etc. To measure blood oxygen with low-physical and mental load,a method based on reflected detection was proposed in this paper. Firstly,fingertip pulse signal was collected by reflectance sensor DCM03 and blood oxygen analog front end AFE4490,and then digital signal processing was conducted to improve signal-noise ratio( SNR). Lastly,extreme point was determined to obtain signal envelope,AC and DC component were obtained to estimate blood oxygen value. The experiment verifies that the relative error between true values and measured values is within 3%,the method can extract blood oxygen effectively and instantly,it is a great significance for patient monitoring and remote diagnosis.
引文
[1]Castillejo P,Martine J F,Rodriguez-Molina J,et al.Integration of wearable device in a wireless sensor network for an E-health application[J].Wireless Communications,IEEE,2013,20(4):38-49.
[2]徐伟.反射式脉搏血氧饱和度信号检测与分析系统[D].兰州理工大学,2012.
[3]秦颖,张晶,蔡靖,等.基于交直流分离的反射式血氧饱和度测量系统的设计[J].传感技术学报,2015,28(06):933-937.
[4]蒋曲博,甘永进,张翠娜.反射式血氧饱和度检测系统研制[J].中国医学物理学杂志,2017,(01):58-64.
[5]朱金松,伍守豪,郭文秀,等.基于血氧模拟前端AFE4490的无创血氧测量模块设计[J].中国医疗器械杂志,2015,39(05):341-343.
[6]陈真诚,甘永进,朱健铭.基于AFE4400的反射式血氧饱和度检测系统[J].传感器与微系统,2016,35(05):91-93+96.
[7]徐盼盼,徐冰俏,徐文龙.基于AFE4400的脉搏血氧饱和度检测系统[J].激光与红外,2015,(03):320-324.
[8]周堂兴.基于FPGA的脉搏与血氧饱和度监测系统研究[D].东华大学,2015.
[9]马勋,李雅涵,庞宇,等.基于智能终端的血氧信号处理算法研究[J].生命科学仪器,2015,(01):26-30.
[10]李雅涵,马勋,庞宇,等.基于智能终端的血氧信号采集装置设计[J].生命科学仪器,2014,(05):39-41+29.
[11]张诚,王一鹤,苗长云.光纤光栅脉搏波分析处理及特征提取[J].信号处理,2015,31(09):1145-1151.
[2]徐伟.反射式脉搏血氧饱和度信号检测与分析系统[D].兰州理工大学,2012.
[3]秦颖,张晶,蔡靖,等.基于交直流分离的反射式血氧饱和度测量系统的设计[J].传感技术学报,2015,28(06):933-937.
[4]蒋曲博,甘永进,张翠娜.反射式血氧饱和度检测系统研制[J].中国医学物理学杂志,2017,(01):58-64.
[5]朱金松,伍守豪,郭文秀,等.基于血氧模拟前端AFE4490的无创血氧测量模块设计[J].中国医疗器械杂志,2015,39(05):341-343.
[6]陈真诚,甘永进,朱健铭.基于AFE4400的反射式血氧饱和度检测系统[J].传感器与微系统,2016,35(05):91-93+96.
[7]徐盼盼,徐冰俏,徐文龙.基于AFE4400的脉搏血氧饱和度检测系统[J].激光与红外,2015,(03):320-324.
[8]周堂兴.基于FPGA的脉搏与血氧饱和度监测系统研究[D].东华大学,2015.
[9]马勋,李雅涵,庞宇,等.基于智能终端的血氧信号处理算法研究[J].生命科学仪器,2015,(01):26-30.
[10]李雅涵,马勋,庞宇,等.基于智能终端的血氧信号采集装置设计[J].生命科学仪器,2014,(05):39-41+29.
[11]张诚,王一鹤,苗长云.光纤光栅脉搏波分析处理及特征提取[J].信号处理,2015,31(09):1145-1151.