基于FPGA的高精度多通道信号源设计与实现  

Design and Implementation of High-Precision Multi-Channel Signal Source Based on FPGA

作　　者：洪明森 洪应平[1] 林雅坤 畅彦祥 张会新[1] HONG Mingsen;HONG Yingping;LIN Yakun;CHANG Yanxiang;ZHANG Huixin(Key Laboratory of Instrumentation Science and Dynamic Measurement of Ministry of Education,North University of China,Taiyuan Shanxi 030051,China;Military Representative Office of the Army Equipment Department in Beijing,Taiyuan Shanxi 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 [2]陆军装备部驻北京地区军事代表局某代表室,山西太原030051

出　　处：《电子器件》2023年第3期592-597,共6页Chinese Journal of Electron Devices

摘　　要：针对航天领域遥测系统设备地面测试阶段需要模拟多种信号,以完成地面模拟试验,设计了一种基于FPGA和千兆以太网的高精度多通道模拟信号源。该信号源以FPGA作为系统的核心控制器,通过千兆以太网接收上位机传输的指令来控制信号的输出,实现了65路0~5 V、10路0~28 V、8路-15 V~0 V可调直流模拟电压输出、2路TTE网口信号输出和16路RS422数字信号输出。该信号源结构设计简单合理,配套上位机能够对直流电压信号进行幅值设定和精度补偿,能够达到输出幅值精度优于0.01%,同时能够配置数字信号的帧格式和数据内容,能够兼容HDLC、PCM等多种数字协议。实验表明,系统能够实现所需信号的高精度可靠输出,并且具备极高的兼容性,目前,该信号源已经成功应用于某数据采编存储器的地面联试实验。In view of the need to simulate a variety of signals in the ground test phase of telemetry system equipment in the aerospace field to complete the ground simulation test, a high-precision multi-channel simulation signal source based on FPGA and Gigabit Ethernet is designed. The signal source uses FPGA as the core controller of the system, and receives the instructions transmitted by the host computer through Gigabit Ethernet to control the output of the signal. It achieves 65 channels of 0~5 V,10 channels of 0~28 V,8 channels of-15 V-0 V adjustable DC analog voltage output, 2 channels of TTE interface signal output and 16 channels of RS422 digital signal output. The structure design of the signal source is simple and reasonable. The upper computer can set the amplitude and compensate the accuracy of the DC voltage signal, and the output amplitude accuracy is better than 0.01%. At the same time, it can configure the frame format and data content of the digital signal, and can be compatible with HDLC,PCM and other digital protocols. Experiments show that the system can achieve high precision and reliable output of the required signal, and has high compatibility. At present, the signal source has been successfully applied to the ground joint test of a data acquisition memory.

关 键 词：FPGA 以太网 高精度 兼容性 模拟信号源 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]