Abstract: The design of a high-speed data acquisition and real-time storage system based on PCI-X bus was described in this paper. To achieve high-speed data transmission, the PCI9656 was used as PCI bus master I/O accelerator. An IA server that supported 64bit/66MHz PCI-X and SCSI RAID was adopted as the computer platform, to ensure high-speed real-time data storage. The time control of data acquisition and transmission was realized by programmable logic device. This system had been successfully applied to the echo signal acquisition of a radar system. The continuous radar echo acquisition and storage was implemented, with 100MSPS sampling rate, 10bit quantization precision, and signal distortion less than 0.2%, which met the requirements of high-speed acquisition and real-time storage.

Key words: high-speed acquisition, PCI9656, Redundant Array of Independent Disk (RAID), programmable logic device

摘要： 设计了一种基于PCI-X总线的高速数据采集存储系统。该系统采用PCI9656作为桥接芯片,基于PCI/PCI-X总线实现数据高速传输,采用IA构架服务器以及SCSI硬盘组成的RAID0磁盘阵列保证高速实时存储,用可编程逻辑器件完成数据采集和传输的时序控制。该系统已成功应用于某雷达系统的回波信号实时采集存储,最终实现了在100MSPS采样速率、10bit量化精度指标下,对雷达回波信号的连续全时段采集和存储,且信号失真度小于0.2%,可以满足对信号的高速采集、实时存储的需求。

关键词: 高速数据采集, PCI9656, 独立冗余磁盘阵列, 可编程逻辑器件