基于以太网与FPGA的多通道信号源的系统设计  

System Design of Multi-channel Signal Source Based on Ethernet and FPGA

作　　者：刘文倩 沈三民[1] 刘利生 李建军[1] 刘勇良 LIU Wen-qian;SHEN San-min;LIU Li-sheng;LI Jian-jun;LIU Yong-liang(Key Laboratory of Instrumentation Science and Dynamic Measurement of Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《仪表技术与传感器》2019年第1期30-33,54,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金重点项目(61335008)

摘　　要：针对飞行器测试实验阶段需要模拟飞行器的各种信号以完成测试工作,设计了一种基于FPGA和以太网技术的多通道模拟信号源。该信号源采用FPGA作为系统的核心控制器,AD5628为数模转换器,通过以太网接收上位机传输的指令并通过RS422接口将命令转发给模拟量板,实现12 bit的高精度D/A转换,24路0～15 V,24路-35～+35 V可调直流电压输出。该系统结构设计简单,且测试结果精度优于0. 1%,稳定性高,满足设计要求。Aiming at the need for simulation of the various signals of the aircraft to complete the test in the experimental stage,a multichannel analog signal source based on FPGA and Ethernet technology was designed.The signal source used FPGA as the core controller of the system,AD5628 as the DAC,and received the instructions of the host computer through Ethernet and transmitted the command to the analog board through the RS422 interface,which achieved high precision D/A conversion of 12 bit and the output of 24 way 0~15 V,24 way-35^+35 V adjustable DC voltage.The design of the system is simple,and the accuracy of thetest result is better than 0.1%,and the stability is high,which meets the design requirements.

关 键 词：以太网 FPGA AD5628 模拟信号源 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]