空间遥感仪器便携式数据采集试验系统研究

Portable Data Acquisition Test System for Space Remote Sensing Instrument

为了对空间遥感数据进行方便可靠地实时传输、存储,研究了空间遥感仪器便携式数据采集试验系统。该系统选用XILINX公司的VirtexⅡPRO系列FPGA作为数据处理和控制中心,完成数据存储控制、数据传输控制和数据处理。FPGA根据硬件要求控制系统工作在脱机存储和联机传输两种方式上,存储器件选用基于FLASH结构的电子硬盘,电子硬盘具有防震、轻便、简单的优势,可以满足数据的便携式传输要求,数传方式上选用光纤和LVDS接口作为系统的数据输入端,上位机通信端采用USB总线和以太网技术,增强系统的通用性。经试验验证联机方式下系统数据传输速率可达48Mbyte/s,脱机存储速率可达35Mbyte/s。

The portable data acquisition test system can conveniently and reliably realize the transmission and storage of the space remote data.This system adopts XILINX Virtex II PRO series FPGA as the data processing and control center.The storage and transmission control is also accomplished by FPGA.This system can work in two modes such as off-line storage and on-line transmission.The structure of memory device is based on FLASH electronic hard disk,and it has the advantage of shockproof and portable and so on,which can meet the requirements of portable transfer.The input interface of the system is LVDS interface and optical fiber.In order to enhance the system＇s versatility,PC communication terminal is based on USB bus and Ethernet communication.By the experimental verification,the online data transfer rate of the system is up to 48 Mbyte/s and the speed of offline storage can reach 35 Mbyte/s.