Design Of Multi-physiological Signals Monitoring System Based On SOPC

Along with the development of our society, the progress of science and technology,people’s living standards gradually improved, also accelerated the pace of life, a variety ofpotential factors that induce human disease is not easy to be found, leading to asatherosclerosis, cardiovascular disease and so on, such incidence is rising rapidly. Fortunately,people’s sense of self-care, health believes are increasingly enhanced, hoping that the medicalservice have the advantages of real-time performance, convenience, intelligent etc. Therefore,a large number of portable home medical monitor equipments have been produced in recentyears. These devices can real-time monitor human body physiological signals, which make apreliminary judgment for human body health. On the one hand, these can remind people oftheir physical condition and make appropriate adjustments to prevent the occurrence ofcertain diseases, on the other hand, these also can help people to find related diseases so thattimely treatment, thus greatly improving the people’s health.This system in order to conform to the requirements of the times and the wave ofChinese medical reform, proposed a combination of modern technology multiple disciplinesfor the integrative physiological signal monitoring system. its main content is based on theSOPC (System on Programmable Chip), took Altera company’s Cyclone Ⅱ series low-costEP2C35F672C6Chip as the core to build the hardware System platform, put the embeddedsoft-core Nios Ⅱ as the system core processor. The system consists of hardware, SOPC andsoftware platform. The hardware platform is composed by multi-physiological signalconditioning module, SOPC system circuit and A/D conversion circuit. The function ofmulti-physiological signals conditioning module is to implement the original physiologicalsignal which collected from sensor amplification, filtering and other processing. The SOPCsystem circuit is composed by FPGA (Field Programmable Gate Array), SRAM/SDRAM, SDcard, liquid crystal display device and so on. The A/D conversion circuit puts thephysiological signal conditioning module processed good signal converting from analogsignal to digital signal, and transmits the converted digital signal to FPGA to real-timeprocess. SOPC platform includes Nios Ⅱ CPU and some outer modules. The softwareplatform is developed in the Nios Ⅱ IDE, we designed the main program of the control systemto coordinate control of each module. Use the TFT400*240LCD screen to display variousphysiological signal, which has friendly man-machine interface, supporting different modeswitching function and real-time to display of various physiological signals wave. We take anSD card to store Various physiological signals, which has the advantage of large capacity,low-cost, and easy to carry, preserved data use for further research and analysis. The system make full use of the advantage of parallel data processing of FPGA to realizethe multi-channel physiological data processing analysis, with Nios Ⅱ processor as the core,the peripheral interface circuit is greatly simplified, the volume is reduced, and low powerconsumption, good real-time performance, improved the reliability and stability of the system,which is benefit to expansion of the system and in favor of system upgrade. Experimentsshow that the system overall design has reached prospective purpose, all sorts ofphysiological signals can be collected accurately and stably, the system of SOPC is runningnormally. The system can realize some functions for various physiological signals includingacquisition, monitoring, storage and sending data etc, users can easily through the monitoringsystem to make a real-time monitoring and analysis of their health condition.