基于PCI和FPGA的InSAR基线测量实时采集系统

摘要

针对双天线干涉SAR基线测量系统数据量大、实时性要求高和体积小的特点,设计并实现了一种基于FPGA+PCI的实时数据采集存储系统.系统基于PCI总线技术,采用FPGA和大容量SDRAM对采集数据进行控制和缓存,利用多个硬盘组成的磁盘阵列进行实时存储,实现了CCD相机和激光测距仪与PCI总线间的高速数据实时传输.对系统进行了功能和性能测试,测试结果表明,系统数据吞吐量大,实时性强,性能稳定,能够有效地满足基线测量系统的需求.%A hardware design of a data acquisition and storage system based on PCI and FPGA for the baseline measurement system of dual-antenna interferometric SAR is proposed and implemented, for fulfilling the high speed and real-time requirements. The system realizes high speed data transmission between PCI bus and CCD camera and Laser range finder. The system controls and buffers the data by FPGA and large amount SDRAM using multiple hard disk array for real-time storage. The performance test results show that the system has large data throughput, good realtime , and stable performance.