Research And Realization Of Domestic ECG Detecting System

Cardiopathy is one of the most prevalent diseases in endangering people's health. And ECG is an important diagnostic tool for assessing heart function. The clinic iatrology practices have shown the most effective way for treating heart disease is to prevent and to protect, especially by home health care. So it is valuable to design a domestic ECG detecting system to prevent heart diseases.From the economy and practicality, a domestic ECG detecting system is designed in the paper. The designed system consists of two parts, ECG signal data acquisition and ECG software realization. The data acquisition is composed by signal adjusting circuit, anti-jamming filter circuit, AD converter circuit and a RS232 serial communication circuit. Its function is to adjust the lower signal to acquire the valuable analog ECG signal and convert it to digital signal, which is sent to the PC process by serial communication. The PC software function includes ECG signal post processing, ECG display, ECG replay, information storage and clinic report producing. In the ECG display design, electro-ECG paper is designed to imitate the traditional ECG. In the QRS detecting design, a digital filter is used to stand out R-wave character by processing the post processed signal and to increase the accuracy of the detecting results. In the clinic report producing design, the software analyzes the detecting results and gives diagnostic suggestions.As a preceding study of the domestic network ECG detecting system, the hardware and software are designed in this paper. The tested results show the system has achieved the goals such as ECG signal acquisition, ECG display and QRS detecting. Therefore, this groundwork will greatly facilitate the following researches.