生物医学信号的实时监控与数据采集

Real-Time Monitoring and Data Acquisition of Biomedical Signal

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Ps2104 A/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。

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 fi＇equency （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 fi＇equency 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.