AD698在RVDT传感器测量中的应用

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AD698RVDT1,2(1.,611756;2.710100):AD698,AD698RVDT。,。、、、,。:AD698;RVDT;;:TN702:A1674-6236(2012)08-0177-03AD698applicationofRVDTsensorLIUJia-xin1,LIUJun2(1.SchoolofInformationScienceandTechnology,SouthwestJiaotongUniversity,Chengdu611756,China;2.Xi’anAerospacePropulsionInstitute,Xi’an710100,China)Abstract:TheessaybrieflyintroducestheworkingprinciplesofAD698,andmainlydiscussestheproducts’practicalapplicationintheaspectofthesensorRVDTmeasurement.Bymakingthedemandanalysis,theauthormadedetailedexplanationsfortheparametersandcircuitdesigns.Thedesignofthesignalpowersourceismadebasedontheinput&outputsignaltogetherwiththesignaltransmissionlinkset,inordertoimprovetheaccuracyofreliability,andfinallyachieveanapprovingeffect.Keywords:AD698;RVDTsensor;measure;reliability:2012-03-19:201203144:(1991—),,。:。LVDT,,、[1]。,,,。RVDT(RotaryVariableDifferentialTransformer),。LVDT,,,,[2-3]。RVDT,,、,,360°,、、、,。RVDT[2],,2,,。AD698,。1AD698AD698ADI。AD698RVDT/LVDT,、RVDT/LVDT。AD698RVDT/LVDT,,RVDT/LVDT,,。AD698[4]:1),,。RVDT,RVDT;2)、;RVDT,、4;3)20~20kHz,。24V,LVDT,LVDT100mV;ElectronicDesignEngineering20Vol.208No.820124Apr.2012-177-DOI:10.14022/j.cnki.dzsjgc.2012.08.050《》201284),;5),;6)LVDT。;;。2AD698AD698[4]1RVDT,2,A/B,。500μA,RVDT/LVDT,1。AD698VEXC,VEXCRVDT/LVDT,,(A/B),A/B。AD698,RVDT/LVDT。。,。,。。20Hz~20kHz,2~24V。AD698AB。BRVDT/LVDT,A,。RVDT/LVDT,A0V,A(B)。,A,RVDT/LVDT。AD698A()B(),。,A/B,。A/B1,100%。500μA。500μA,AD698:Vn=500μA×A/B×R2R2。3AD698RVDTRVDT20XXCW-1B,。20XXCW-1B,:1):12V,:400Hz;2):±40°;3):0.15±0.008V/°;4):1%。3.1RVDTA/D,A/D-5~+5V,RVDT。RVDTVB,,。2。1)±15V,6.8μFC1、C2100nFC3、C4。2)fexc=400HzC5,C5=35μF/fexc,C5=87.5nF。3)AD698R1,Vexc=12V,VexcR1:R11~2kΩ。2.5kΩR1,R1,。4)C6、C7C8AD698fSYSTEM,:C6=C7=C8=10-4FHz/fSYSTEM,fSYSTEM=400Hz/10=40Hz,C6=C7=C8=2.5μF。5)S(),d()R2。VOUT=S×d×500μA×R2,:R2=VOUTs×d×500V,1AD698Fig.1FunctionalblockdiagramforAD6982RVDTFig.2InterconnectiondiagramforRVDTmeasuring-178-InstituteofTechnology:NaturalSciencesEdition,2006,15(1):29-32.[3],.Buck[J].:,2009,8(5):525.CHENQi,JIZhi-cheng.Modelingandslidingmodecontroloftheaveragecurrentmodeparallel-connectedbuckconverters[J].JournalofJiangnanUniversity:NaturalScienceEdition,2009,8(5):525.[4],.[J].,2012(1):65-67.WUXiang-fei,YANGJun.Onthedesignofparallelswitchingpowersupplysystem[J].ElectronicsWorld,2012(1):65-67.[5],.[J].,2009,(2):109-112.ZHANGSong,RENJi-lin.Designofparallelcurrentequalizerforhighswitchingpowersupply[J].JournalofAirForceRadarAcademy,2009,(2):109-112.[6]JungWK,HangSC,BoHC.Anoveldroopmethodforconverterparalleloperation[J].IEEETransactiononPowerElectronics,2002,17(1):25-31.20XXCW-1BVOUT=±5V。S=0.15V/°,d=±40°,R2=1.667kΩ。6)R3、R4、。VOSR3、R4VOS=1.2V×R2×1R3+2k-1R4+2k!VOS,R4;VOS,R3、R4。2R3、R4。3.2AD708AD698。3.3,,:1)fexc=398Hz;R2=1.8kΩVEXC=11.78V,;2)10mV。、。3.4,6:1)。DC/DC。,[4]±2.5V;2),;3),R1,R2,C5,C6,C7,PCB;4);5)AD69830mA,(100m),,RVDT,,;6)RVDT,,RVDT,[5-6]。4AD698RVDT,RVDT,。、,,RVDT,RVDT。:[1],.LVDT[J].,2007(3):321-324.LIYong,ZHANGJun-an.StudyonLVDTsignalconditioningcircuit[J].Microeletronics,2007(3):321-324.[2],.LVDT[J].,2008(3):34-36.LIUChun-mei,LENGJie.Designofinductancedisplacementtransducercircuitsystem[J].Metrology&MeasurementTech-nology,2008(3):34-36.[3]LVDT[EB/OL].(2010-08-23).[4]UniversalLVDTSignalConditionerAD698DataSheet(Rev.B)[EB/OL].(1995-07].[5].[M].:2003.[6]PaulBrokaw.AN-2021C.、[EB/OL].(2010-01-27)[7],,.[J].,2010(12):80-83.LUXin-liang,LUJiang-ping,SONGXiao-lin.ExperimentalStudyonElectromagneticCompatibilityofElectronicTrans-former[J].ShaanxiElectricPower,2010(12):80-83.(176)#####################################################################################,AD698RVDT-179-

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