Design And Realization Of The Multiphysiological Parameter For Monitor

Multiphysiological parameter monitor as the important device to monitor the physical health signal becomes more and more popular,monitoring of the single physical signal can't meet the requirements,along with the development of electronic technology and computer technology,a variety of physiological parameters monitor is possible,and also the equipment change from the huge volume and expensive to the portable and family-oriented,but it is still can be better.Traditional collecting of the multi-channel analog physiological signals need to design separate analog channels for each physiological signals,because the physiological signal belongs to the weak analog signal,and there are many noise,the design of the analog signal pre-processing circuit is complex relatively,pre-processing for the signal include the preamplifier circuit?filter circuit?after the preamplifier circuit,this kind of design will not only increase the difficulty of debugging,increase the volume of the product,also reduce the stability of the product,the design idea in the paper use the integrated analog front-end to take place of the independent analog channels which are make of the discrete components for this issue in terms of the monitor for respiratory signal,ECG,pacing signal,design the digital filter to take place of the traditional analog notch filter for the frequency signal interference.In the paper we take ADI's latest integrated analog front-end local as the improved point,introduce the mechanism and a typical time-domain feature map of ECG,based on the compare and analyze advantages and disadvantage of the common automatic ECG analysis algorithm we chose differential threshold algorithm to detect QRS wave group simply,based on the mechanism of the respiratory signal and common detect method of the respiration signal,based on the typical pacing signal we design the detect method for the respiration signal,and propose impedance detect method based on the impedance detect principle,introduce Lang Bo-Bier law for the measuring of the Non-invasive blood oxygen saturation,and deduced the oximetry algorithm based on the Lang Bo-Bier law,based on the common measurement of Non-invasive blood pressure,after the comprehensive comparison,we chose oscilloscope amplitude coefficient to monitor blood pressure.In the paper we set up the file system to storage file,use interactive interface which make up of the keyboard and LCD to display data and wave,communicate with PC by RS232,use LabVIEW complete the design of the PC interface,complete the design of program for detection of multiple physiological parameters,digital filter,file system,LCD display,data transmission by SPI interface,Finally,debugg the system and analysis the results,the feasibility of the design is verified.