欢迎来到天天文库
浏览记录
ID:51440660
大小:934.41 KB
页数:5页
时间:2020-03-24
《光泵磁敏传感器中FPGA调频器设计与实现.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第25卷第11期传感技术学报V01.25No.1lCHINESEJOURNALOFSENSORSANDACTUA'I’ORSNOV.20l22012年11月DesignandRealizationofFrequencyModulatorwithFPGAforOpticallyPumpedMagneto-DependentSensorⅣMingchang一,CHENGD,ZHOUZhijian,WANGJun,HECong,。(1.LaboratoryforGeophysicalInstrumentationofMinistryEducation,JilinUnivers
2、ity,Changchun130026,China;2.ColegeofInstrumentationandElectricalEngineering,JilinUniversity,Changchun130026,China)Abstract:Frequencymodulatorinradiofrequencyisthekey&5vencomponentoftheheliumopticalpumpedmagneto—dependentsensor.FrequencymodulatorwithanalogVCOhassomeissues,suchasfrequencyi
3、nstability,dificultyoftrou—bleshootingandtherequirementofhigh—precisionfrequencymeasurementcircuit;frequencymodulatorwiththeintegratedchiphasthedisadvantagesofthecontrolcomplexityandhigherpowerconsumption;thenfrequencymodulatorwithFPGAhasmanyadvantages,suchashighfrequencystability,withou
4、ttherequirementofhigh—precisionfrequencymeasurementcircuitandintegratedintotheFPGAcontroller.Thispaperpresentsthedigitaldetectingprinciplesofheliumopticalpumpedmagneto-dependentsensorandthetechnicalspecificationsoffrequencymodulator,describestheprincipleofthefrequencymodulatorwithFPGAand
5、realizesthedesign.TheresultsofFMsignaldemodulationexperimentandsweep—typemagneticresonancesignaldetectionexperimentshowthatthefrequencymodulatorwithFPGAmeetsthedigitaldetectingspecificationsoftheheliumopticalpumpedmagneto—dependentsensor.Keywords:magneto—dependentsensor;digitalfrequencym
6、odulator;sweep—typemagneticresonancedetection;FPGAEEACC:7230doi:10.3969/j.issn.1004—1699.2012.011.027光泵磁敏传感器中FPGA调频器设计与实现术连明昌,程德福,周志坚,王君,何聪(1.吉林大学地球信息探测仪器教育部重点实验室,长春130026;2.吉林大学仪器科学与电气T程学院,长春130026)摘要:射频场调频器是氦光泵磁敏传感器核心驱动部件。模拟压控振荡式调频器存在频率不稳、调试困难和需要高精度测频电路等问题,集成芯片调频器存在控制复杂和功耗高等不足,而FPGA调频器
7、具有频率稳定度高、不需要高精度测频电路和集成在FPGA控制器里的优点。提出氦光泵磁敏传感器数字检测原理和调频器技术指标,阐述FPGA调频器原理并完成设计。调频信号解调实验和扫频式磁共振信号检测实验的结果表明FPGA调频器满足氦光泵磁敏传感器数字化检测要求。关键词:磁敏传感器;数字调频器;扫频式磁共振检测;FPGA;中图分类号:TH867文献标识码:A文章编号:1004-1699(2012)11-1618-05氦光泵磁敏传感器¨是以氦原子在外磁场中驱动部件,其频率范围、稳定度和调制性能等指标直的塞曼效应为基础,利用光泵和磁共振作用研制而接影
此文档下载收益归作者所有