Design Of Blood Oxygen Detection System Based On Three-electrode System

Oxygen concentrations are commonly used as a measure of the state of the human body and an important parameter to monitor the patient’s physical condition.The current commonly used blood oxygen detector is not enough measurement accuracy and measurement error and other issues.Therefore,It is a very important problem to design of a set of high detection accuracy of the oxygen test system.Based on the principle of three-electrode system measurement,a set of blood oxygen test system is designed.Oxygen detector is based on the current value and blood oxygen content in a certain range have a linear relationship.By measuring the current value,calculate the corresponding oxygen concentration.Measure the oxygen concentration using a three-electrode system for measurement.The three electrodes include a working electrode,a reference electrode and an counter electrode.With the development of microprocessor and the continuous improvement of the embeded technology,the modern medical electronic got a great development.This article describes a blood oxygen detection system based on the rapid development of embedded technology.This system can detect human blood oxygen and upload and display in real time.This paper first describes the current status of the development of blood oxygen related fields,and then introduces several basic methods of current blood oxygen testing,and then describes in detail the principle of three-electrode blood oxygen detection and specific implementation methods.This system uses ARM Cortex-M4 as the core processor,equipped with μC/OSII embedded operating system,the personal computer based on labwidows / CVI software platform as a host computer to manage.Through the powerful function of LabWindows / CVI to achieve data reception,data display and other functions.This paper also introduces the LWIP protocol,gives the hardware interface driver implementation,the final realization of the detection of oxygen concentration through the embedded Ethernet transmission to the PC side.