便携式家庭心电监护记录仪的研制

Study for Portable Dynamic ECG Monitor and Recorder

设计一种基于MSP430F149单片机的多通道便携式家庭心电监护系统。系统由心电检测电路、人机交互模块、MSP430F149和上位机软件组成。心电检测电路包括前置放大器、低通滤波器、高通滤波器、陷波电路、主放大电路,用于检测心电信号和抑制各种干扰。使用单片机同步采集三路心电信号,同时在高分辨率的液晶显示器上动态显示心电波形;并将心电数据以FAT16文件系统实时存储在SD卡中,方便数据的回放和上位机对数据的管理。最后通过上位机程序实现对心电信号的处理与分析,为医生诊断提供依据。

This Paper presents a portable dynamic ECG monitor system based on MSP430F149 microcontroller. The electrocardiogram detecting system consists of ECG detecting circuit, man-machine interaction module, MSP430F149 and upper computer software. The ECG detecting circuit including a preamplifier, second-order Butterworth low-pass filter, high-pass filter, and 50Hz trap circuit to detects electrocardiogram and depresses various kinds of interference effectively. A microcontroUer is used to collect three channel analog signals which can be displayed on TFT LCD. A SD card is used to record real-time data continuously and implement the FTA16 file system. In the end, a host computer system interface is also designed to analyze the ECG signal and the analysis results can provide diagnosis references to clinical doctors.