基于二維振動線圈的靜態(tài)磁場矢量計的研究.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文基于二維振動線圈的靜態(tài)磁場矢量計的研究姓名：尹靜申請學(xué)位級別：碩士專業(yè)：@指導(dǎo)教師：@@2ABSTRACTSensingmeasuringstaticweakmagicvecthasbeenwidelyappliedinmanyfieldssuchaselectroniccompassmagicmappingtargettrackingnondestructivedetection.BasedontheFar

2、aday’slawofinductionvibratingcoilmagometerwiththecoilvibratingintheunifmmagicfieldisakindofstaticmagicsenswhichdetectsthemagicfieldfluxperpendiculartothecoil.Comparedtoothermagometersofdifferentprincipleitsharesmanyadvan

3、tageslikesimplestructureindependentontheacteristicsofsenss’materialgoodlinearitywithaircecoilsoon.Howeversincethevolumeoftheactuatactivatingthecoilisrelativelylargethevibratingcoilmagometerdevelopsslowlyinthedirectionofc

4、ombiningminiaturizationtheabilitytodetectingallthecomponentsofthemagicvect.Basedonthemodalanalysisofthepiezoelectriccantileveractuatanovelstaticvectmagometermakinguseoftwodimensional(2D)coilsispresentedinthispaper.Itposs

5、essestheadvantagesofsmallvolumehighsensitivitydetectingallthecomponentsofthemagicvectatthesametime.Inthispaperit’stheeticallyanalyzedexperimentallyverifiedthatthetwovibrationmodesofthepiezoelectriccantileveractuatwithasl

6、ightoffcenterinthewholeconfigure:thebendingmodethetwistingmode.2Dcoilsfastenedtothefreeendofthecantileveraredrivenbythesetwothogonalvibrationsgeneratevoltageoutputsproptionaltothemagicfield’sdensitywherethecoilsarelocate

7、d.Therelationshipbetweenthestaticmagicvecttheinducedelectromotivefcesofthecoilsisexperimentallyverified.MeoveraweaksignaldetectingsystembasedonthesoftwareLabVIEWthealgithmofthephasesensitivedetectionisdevelopedissuccessf

8、ullyusedfdetectingthevoltagesignallowtovolts.Atlastanexperimentaltestplatfmisbuiltuptheacteristicsoftheprototypeincludingcircuitnoiselevelweremeasuredanalyzed.Twocoilswithф6.5mmф7.5mmindiameterrespectivelyareusedasthemag

9、ometerprobe.Experimentalresultsshowthatthisnovelstaticvectmagometerpossessesthesensitivityof0.74mVnT1.81mVnT1.36mVnTrespectivelyinxyzaxiswhenitvibrateswiththewkingfrequencyof1104.3Hzftwistingmode429.1Hzfbendingmodeithasa

10、goodlinearityinthetestedrangeof16Twithastepof0.62T.Accdingtotheanalysisofthecircuitnoiseit’sinferredthatthemagometerhasaresolutionofabout30nTinthefrequencyrangeof0.01Hzto1Hz.Keywds:SensitivityVibratingCoilPiezoelectricAc