雷达视频回波信号的实时采集、显示与存储系统

介绍一种雷达视频回波信号的实时采集、显示与存储系统。该系统采用带有RAID适配卡的工控机作为采集主控设备，以普通微机显示器作为显示设备，利用多个IDE硬盘组成磁盘阵列作为存储设备。制作了一块基于FPGA的高速雷达信号采集PCI卡，以FPGA为采集的核心控制芯片，并在FPGA内部实现了32bit／33MHz的PCI接口逻辑。利用FPGA内部双口RAM的乒乓切换与缓冲区环行存储技术保证了连续采集。采用数据抽取、坐标查表映射和DirectDraw等技术在普通显示器上以P显方式进行实时全屏显示，同时可对局部区域以B显进行开窗放大显示。显示过程中可对任意区域设置采集方位和距离波门，将采集的数据实时存储在磁盘阵列上。该系统已成功用于舰栽警戒搜索雷达的外场数据采集。

Real-Time Data Acquisition System of Radar Video Echo Signal

A real time data acquisition system of the radar video echo signal is introduced. The system uses a microcomputer with a RAID card as the acquisition control equipment, and common microcomputer monitor as the display device, and several IDE hard disks as the disk array to store the acquired data. A high speed radar signal acquisition PCI card based on FPGA is designed to acquire radar data. FPGA is used as the kernel chip to control the data acquisition, and to implement the 32 bit/33 MHz PCI interface logic. The dual-port RAM in FPGA and the buffer stora.ge in the microcomputer can provide continuous acquisition, and the data selection, coordinate inquiry list mapping and the DirectDraw technique can implement the real-time PPI display and the B-scope display on the microcomputer monitor. The azimuth and the distance wave gate of any areas can be set, and the acquired data on disk array can be stored at real time.