The measurement study of blood oxygen based on reflective method
GAN Yongjin
Li Qiong
ZHENG Jincun
YANG Xiaofeng
GAN Guomei
JIANG Qubo
Abstract：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 DCM 03 and blood oxygen analog front end AFE 4490, 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 moni-toring and remote diagnosis.
Keywords：Pulse waveBlood oxygenReflective sensorAnalog front endDigital signal processingSignal-noise ratio(SNR)
Publication Date：2018-01-01
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：5( 138-141,158 )