心电监测系统的设计

A design of the ECG detection system

心电监测系统是用来采集、分析及显示心电信号的医疗设备。心电监测系统的硬件电路设计包括高频干扰滤除电路、导联选择电路、差动输入电路、50Hz工频干扰滤除电路、前置放大电路等模拟预处理电路的设计和基于单片机的数据采集、存储和传送系统的设计。心电监测系统的软件设计,主要是指在Visual C++6.0的开发环境下心电分析、显示软件的设计,包括患者信息输入模块、串口通讯模块、分析显示心电波形模块、保存心电数据模块和读取心电数据模块的设计。

Doctors may analyze ECG signals to make sure the patient have heart disease or not. The ECG monitor is a device to sample, analyze and show the ECG signals. So the ECG monitor must run stable to provide accurate ECG signals. The circuit of the system before the MCU should be designed to pick up and magnify the useful signa~. While, it must filter the useless noise at the same time. Moreover the circuit must pass only one of the three leads＇ signals. The MCU should be designed to transform the analog signals into digital signals then send the data to personal computer. The software of ECG monitor should be programmed to get the information, inputted by operators, receive the data, sent by the MCU, and analyze, show the data. The software must be designed to save and read the ECG data too. Visual C ＋ ＋ is one of the suitable tools to develop the software above.