Design Of Intelligent Electronic Blood Pressure Meter Based On SOPC

Blood pressure is the important physiological parameters which reflects the status of cardiovascular system, the appropriate blood pressure is necessary conditions for the body to maintain the normal metabolism. With the continuous improvement of people's living standards as well as a higher proportion of urban aging, the sense of self-care has gradually been enhanced, and medical testing equipment has become a trend in family-oriented, and blood pressure meter is one of the typical family medical testing devices.Electronic blood pressure monitor has a low-cost, small size, high degree of automation benefits. A design of intelligent electronic blood pressure meter based on the SOPC system is introduced against the shortcomings of previous digital blood pressure meter in this article. The method of measuring blood pressure is the oscillometric method during charging process. The system uses Cyclone II Series low-cost FPGA, and embedded Nios II soft-core CPU as the core processor, amplitude coefficient algorithm used to calculate the value of blood pressure and heart rate values. The blood pressure monitor automatic blood pressure measurement to be completed, information display, data storage, review and delete the historical data and other functions. As a result of using FPGA, it simplifys circuit design, improves reliability and stability, makes the system have a stronger expansibility, which in favor of system upgrade.In the first, this article introduces the research about the background and significance of blood pressure measurement, and the basic principles and the basic measurement methods, highlighting based on the oscillometric measurement method.Secondly, the concept of SOPC technology is introduced and the prospect of the SOPC technology is analysed in this article. The article introduces some concepts with the Nios II soft-core-related, as well as the hardware and software development environment of SOPC based on FPGA system The article focuses on the hardware and software design process of SOPC-based intelligent electronic sphygmomanometer, focusing on design process of the core system of the SOPC and the peripheral circuit in the form of the module circuit design. For the software of the system, the article designs each functional module subroutine individually.Finally, the article describes the debugging process of the system, shows the experimental results and analyses the causes of the errors, and also gives some improvement recommendations of the system.