摘要
介绍一种基于PCI总线的PC机插卡形式的高速数据采集系统。该系统的特点是:由Windows98下的应用程序控制采集,能满足雷达在距离、方位上的开窗采集要求;采集的数据既可用PC机内存作暂存,也可送入其他处理插件;通过运用多通道并列技术,可以并行同时采样4路模拟信号,也可以在串行处理方式下以4倍速率采集1路模拟信号;数据采用PCI总线接口,并配合Windows98的虚拟设备驱动程序,使32bit数据传向PC机的速率达到30MHz。
This article introduces a high-speed data acquisition system based on PCI bus. The system has some features. Controlling the sampling under Windows98, the system can select data according to the window of distance and azimuth of radar. The acquired data can be transmitted to next board or PC’s RAM. By use of multi-module interleaving technique, the system can sample simultaneously four channels of analog signals or sample one channel of analog signals at fourfold speed with serial mode. Using PCI bus interface and supported by VxD(Virtual Device Driver),the speed at which the 32-bit data is transmitted from PCI card to PC is up to 30MHz.
