生物医学信号的实时监控与数据采集

目的：开发基于普通微机的通用生物医学信号采集系统。方法：以Ps2104A／D／A转换卡为接口，采用C语言与汇编语言混合编程方式，自动检测微机速度并计算出调整采样频率的参数，经软件分频实现对采样频率的控制。以显示器为终端，对多路生物医学信号进行同步实时监控。结果：本系统可自动适应不同主频的普通微机，采样频率精度高，数据连续采集时间长和硬件适应能力强。结论：本系统可同步采集多路高信噪比的生物医学信号。

Real-Time Monitoring and Data Acquisition of Biomedical Signal

Objective: To develop an all-purpose collection system of biomedical signals based on general computer.Methods: A ps2104 A/D/A was used as interface and a program was written with mixed C and assembly language.The program detected the speed of the computer,and worked out the parameters to adjust sampling frequency(SF) automatically.The SF was controlled by software to divide frequency.Using a monitor as terminal,multi-channel biomedical signals were monitored in synchro real time.Results: This system can adapt to common computer of different basic frequency automatically.The accuracy of SF is high,the time of continuing collection is long,and the capability to adapt hardware is strong.Conclusion: The system can collect multi-channel biomedical signal with high signal-to-noise synchronously.