人体心电心音信号定征分析系统设计

目的：设计人体动态心电心音信号定征分析系统。方法：设计了一套以内置A／D的单片机为控制核心，结合信号调理电路和USB通信接口传输的同步采集系统及VC＋＋6．0开发的心电心音定征分析系统，整个系统包括模拟电路、数字电路和PC客户定征分析软件等3个部分。结果：采用双通道、双采样率采集方法实现了动态心音和心电信号的同步采集、实时存储，并可从复杂的带噪原始信号中精确检测提取出心电信号的QRS波、P波、ST段等以及心音信号的各成分。结论：整个系统操作简便、测量准确、功耗低、体积小、数据分析处理功能强大，可在家庭和医院使用。

Characterizing Analysis System for ECG and PCG Signals

Objective To design a system for synchronous detection of dynamic ECG and PCG signal and the characterizing analysis. Methods A synchronous gathering system was designed based on the MCU chip control, which combined corresponding signal conditioning circuits and USB interface. The characterizing analysis soft was designed with VC＋＋6.0. The system included three parts, such as the simulative circuit system, the digital circuit system and the characterizing analysis soft by VC＋＋6.0. Results The signals were sampled by double channels and double sampling frequency, stored and uploaded to PC by USB interface. The QRS wave, the P wave and the ST section of the ECG signal and all the parts of the PCG signal could be extracted precisely from the complex primary signal contaminated by serious noise. Conclusion The whole system, with the features of simple operation, exact measurement, low power, small size and strong ability of data processing, can be used at home and hospitaLChinese Medical Equipment Journal,2010,31 （4） ：24-26,30]