Design Of Electrocardiogram Monitor System Based On ARM7

Heart disease is one of the most prevalent diseases threaten to the human's life. How to prevent and treat heart disease has became to a main problem of medical circle.The dynamic ECG monitors ystem designed in this paper can continuously trace patient's heart activity for 24 hours and provide important reference for clinical diagnosis of cardiovascular disease.The dynamic ECG monitor based on ARM7 designed in this paper consists of ECG signal acquisition circuit and ECG signal processing circuit.The ECG signal acquisition circuit is composed by preamplifier,main amplifier,band-pass filter, 50Hz BEF and A/D converting circuit.Its function is to adjust the lower signal to obtain the valuable analog ECG signal,which is processed by ARM7 microcontroller.In ECG signal processing circuit,we select the low cost and low power ARM7 microcontroller LPC2214 manufactured by NXP as CPU,carry out the functions of storage ECG signal,ECG display and ECG replay.In data storage module,we use the mass storage NAND Flash memory as main storage medium,and support extending SD/MMC card,it can farthest suffice the memory requirement of ECG monitor.The process of system debug indicates that the hardware of ECG monitor system has achieved prospective target.The amplifier's gain and filter's frequent characteristic of ECG signal acquisition circuit has achieved design demand.In ECG signal processing circuit,the mini-system of LPC2214 is running normally,and can correctly collect and display ECG signal.