运动心电图检测系统中数据采集卡的研制

目的：研制一种能够高精度同步采集多路运动心电信号的专用数据采集卡。方法：1）硬件上，以196KC单片机为核心构成数据采集系统，设计可以完成数据采集、基本数据预处理及相关控制的数据采集卡；2）软件上，单片机完成A/D转换、信号的实时预处理以及与主机通信3大任务，主机则接收数据并且实时处理数据。结果：在运动心电图的检测系统中所设计的数据采集卡配合主机CPU实现了双处理器工作，同时为了减轻主机负担，由数据采集卡完成数据预处理功能，合理利用了硬件资源。结论：该数据采集卡能够满足运动心电图临床检测的要求。

Development of Data Acquisition Card in Exercise-ECG Detection System

Objective To develop a data acquisition card in exercise ECG detection system that can gather multi channel exercise ECG signals simultaneously and precisely. Method 1) In hardware, the card was based on 196 KC single chip microprocessor which can gather signals, process data and control circuit; 2) In software, single chip microprocessor completed the following three main tasks: the A/D conversion, signal processing and communication with computer. The main computed receives the data and performs real time data processing. Result The data acquisition card in exercise ECG detection system cooperates with the main CPU. In order to release the main CPU, the card realizes the data pre processing and makes reasonable uses of the hardware resource. Conclusion The data acquisition card could meet the needs of clinical detection of exercise ECG.