多普勒天气雷达高速数据采集系统的设计  

Design and Implementation of High Speed Data Acquisition System for Doppler Weather Radar

作　　者：宗安 姚振东[1] 佘勇[1] 李建[1] 

机构地区：[1]成都信息工程学院电子工程学院中国气象局大气探测重点开放实验室,四川成都610225

出　　处：《成都信息工程学院学报》2015年第2期136-143,共8页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(41475143);中国气象局大气探测重点开放实验室资助项目(KLAS201104)

摘　　要：多普勒天气雷达需要一个高速数据采集系统,以实现大量的基数据到微机中的实时传输,同时将控制命令传送到雷达处理器中。利用FPGA器件zynq-7000具有片上系统(SOC)的结构特点,构建一个具有高速传输功能的典型信号处理系统。采用千兆以太网芯片88E1518作为数据传输接口,以内嵌的Cortex-A9处理器作为接口的配置和控制部件,通过裁剪和重构Linux操作系统运行由C语言开发的软件应用系统程序代码,实现千兆以太网接口以及数据传输与命令交互功能。有限次实验和测试结果表明,采集系统容易达到640Mbps的数据传输速率,满足雷达数据采集的需求,未出现性能不稳定现象。In order to transmit large amount of base data to a computer in real time and transmit control commands from the computer to a radar processor, a high speed data acquisition system is required in a Doppler weather radar. In this paper, a field programmable gate array （FPGA） device zyn-7000 with a structure characteristic of system on chip （SOC） is used to construct a typical signal processing system which has a high speed transmission function. In this system, a Gigabit Ethemet （GbE） chip 88E1518 is used as a data transmission interface, and an embedded Cortx-A9 processor is used as an interface configuration and control unit. A software application system is developed by running program code developede with C language through cutting and reconstructing the Linux operating system, and data transmission and command interaction between the computer and the acquisition system are realized via a GbE interface. Experiments and test results show that the data transmission rate of the acquisition system can reach to 640Mbps, so the radar data acquisition requirement can be met, and instability phenomena have not appeared.

关 键 词：信号与信息处理 雷达数据采集 片上系统 LINUX操作系统 千兆以太网 现场可编程门阵列 

分 类 号：TN911.72[电子电信—通信与信息系统]