Study On Embeded System Used In ECG

With the development of the country's economic, people's living quality have increased in a substantial. However, the increase of the living quality indicating that the number of heart patients will increase . Heart disease has become one of the major diseases which threat to the lives of people. So the detection of the heart and the diagnosis and the fact that the report after unusual activity is very important . A portable ECG systems used in China are mostly foreign products, its mode of custody is also a fact detect, read, ECG data storage, regular delivery to care center for testing, it is obviously that it cannot meet future medical technology development needs. According to the shortage of the existing ECG monitoring system herein, introduction a embedded system technology, designed a ECG monitoring system base on FPGA. The system use the chip EP2C8T144C8 as the carrier which made by Altera company to digital circuits integrated for the CPU core, strong performance, low power consumption, small size and other advantages. The following key elements:First introduced the principle of generating the new electrical signals, the significance of the band of the electrocardiogram and the method of the ECG extraction, analysis of the characteristics of the ECG and interfering factors.Design the entire hardware circuit of the ECG monitoring system,, including the two main body of the analog circuit and the digital circuit. Used the operational amplifying circuit AD620 and OP07 designed the pre.amplifying circuit, and the right leg drive circuit and after class amplifying circuit, design the 0.05 Hz high.pass filter circuit, 100 Hz low.pass filter circuit and 50 Hz notch circuit, to simulation with EWB software, and actual detection ECG with the oscilloscope.Use EP2C8T144C8 chips as the carrier , use 8051 ipcore as the core design the digital circuit of integrated, to simulation all the blocks. Use C51 design a cpu control procedures and simple diagnostic procedures have been control procedures of GPRS blocks.