基于FPGA的多通道热电偶信号采集板卡设计

打开文本图片集

关键词：热电偶信号采集板卡；FPGA；多通道同步采集；高低温老化测试；AD7793；千兆以太网中图分类号：TN919.5-34 文献标识码：A 文章编号：1004-373X（2026）06-0030-07

Design of multi-channel thermocouple signal acquisition board based on FPGA

GUO Sheng，HONG Yingping， LEI Peiwen， DANG Lizhi， NIE Xingxing （KeyLaboratoryoficroandNanoDevicesandSystems，MnistryofEducation，orthUniversityofhia，iuan3ia）

Abstract：Inalusiontotherequirementsof high-precisionsynchronousacquisitionandstorageofmulti-chanel temperaturedatainthehigh-lowtemperatureagingtestofautomobileheadlights，amulti-channelthermocouplesignalaqusition boardisdesigned.Inteulti-channeltermocouplesignalacquisitioboardfieldprogram-mablegatearray（PGA）isusedas thecontrolcore，and24-bitΣ-analog-to-digitalconverterAD793isusedastheanalog-o-digitalconversionchip.hoigial dataistransmitedtothehostcomputerthroughGigabitEthernetandstoredintheSDcardasabackup.Thehostcomputeris developedbasedontheQtframework，integratingthefunctionsofreal-timedisplayofmulti-channeltemperaturedata，waveform drawing，datastorage，andanalysisoftheoriginaldataintheSDcard.Theexperimentalresultsshowthatthisboardcanstably realizesynchronous acquisition of 16-channel thermocouple signals，with an acquisition range from to 200C ，a temperature resolution of 0.01 ，and a sampling rate of 1 KSPS.This card can ensure the accuracy of temperature acquisition bymeansof thecalibrationtechnology.Therelativeerorbetweenthetemperaturedatacollctedbythe16channelsoftheboard and the standard temperature is less than 0.2% ，which can provide a high-precision and high-real-time performance evaluation solution for the aging test of automobile lamps.

Keywords：thermocouplesignalacquisitionboard;FPGA；multi-channelsynchronousacquisition;high-lowtemperature agingtest;AD7793;GigabitEthernet

0 引言

车灯是汽车的关键部件之一，可以保障驾驶员的行车安全以及提高道路交通效率。（剩余7776字）