基于FPGA的高精度电量信号输出卡设计  

Design of high-precision electric quantity signal output card based on FPGA

作　　者：焦新泉[1,2] 胡晓捷 贾兴中[2] JIAO Xinquan;HU Xiaojie;JIA Xingzhong(State Key Laboratory of Electronic Testing Technology,North University of China,Taiyuan 030051,China;Key Laboratory of Instrument Science and Dynamic Testing,Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]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：《电子设计工程》2023年第3期6-10,15,共6页Electronic Design Engineering

基　　金：国家重点研发计划资助(2018YFF01010500)。

摘　　要：针对遥测系统中电量信号输出精度低、质量差等问题,该文在电量信号日益高精度、高可靠性的趋势下设计了更高精度的电量信号输出卡。该设计通过以FPGA为核心器件控制电路工作、16位高精度的数模转换器LTC2642实现了DA的高精度转换,输出的电压信号通过松下的光电耦合器AQW210EHAZ将输出信号进行自检,保证输出信号快速、无失真地传输。测试电量信号板卡得出,输出电压信号精度达到任务书要求的±0.16%,自检电压信号精度达到任务书要求的±0.14%,结果表明输出电压信号精度高、可靠性好。According to the problem of low accuracy and poor quality of electric signal output in telemetry system,a more accurate electric signal output card is designed under the trend of increasing precision,high precision and high reliability of electric signal. In this design,the high-precision conversion of DA is realized through the 16 bit high-precision digital to analog converter LTC2642 with FPGA as the core device control circuit. The output voltage signal is self checked by Panasonic optocoupler AQW210-EHAZ to ensure the fast and distortion free transmission of the output signal. The accuracy of output voltage signal reached ± 0.16% and the accuracy of self-test voltage signal reached ± 0.14% of the requirements of the task book. The results show that the output voltage signal has high accuracy and good reliability.

关 键 词：电量信号 FPGA LTC2642 高精度 多通道 

分 类 号：TN710[电子电信—电路与系统]