Electromagnetic Testing-Eddy Current-Basic Principle - SPC Volume I

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1、ElectromagneticTestingEddyCurrent-BasicTheory&Equipment,MethodsandApplications1976’sRQA/M1-5330.12(VolumeIofII)GeorgeC.MarshallSFCMyASNTLevelIIIPre-ExamPreparatorySelfStudyNotes13thApril2015CharlieChong/FionZhanghttp://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19780078298.pdfA

2、erospaceApplicationsCharlieChong/FionZhangPetrochemicalApplicationsCharlieChong/FionZhangYear-1976CharlieChong/FionZhangYear-1976CharlieChong/FionZhangTheMagicalBookfromNASACharlieChong/FionZhanghttp://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19780078298.pdfFrompage3-83-10Tha

3、t'sright.Theterm"fill-factor"appliestoencirclingcoilsandtheterm"lift-off"appliestosurfacecoils.Wheneddycurrentinspectionisperformedbytheuseofencirclingcoils,itiscommonpracticetouseguidestokeeptherodproperlypositionedwithinthetestcoil.ReadingInstruction:toreadthisbookfollowthepagei

4、nstructionbelowofadvancingtotheindicatednextpageThepurposeoftheguidesistoensurethatthelift-offisconstant:False.........................................Page3-11True..........................................Page3-12CharlieChong/FionZhangCharlieChong/FionZhangFionZhangatShanghai10thM

5、ay2015http://meilishouxihu.blog.163.com/CharlieChong/FionZhangGreekletterCharlieChong/FionZhangIVONATTSCapable.CharlieChong/FionZhanghttp://www.naturalreaders.com/tnrreuCyddECharlieChong/FionZhangNONDESTRUCTIVETESTINGEDDYCURRENTBASICPRINCIPLESRIQA/MX1-5330.12(Volume1of2)CharlieCho

6、ng/FionZhangN78-78291NondestructiveTestingEddyCurrentBasicPrinciples.1Jan67PERFORMER:NationalAeronauticsandSpaceAdministration,Huntsville,AL.GeorgeC.MarshallSpaceFlightCenter.NASA-TM-78387Thepurposeofthisvolumeistopresentthebasicconceptsofeddycurrents,toexplainhoweddycurrentsarege

7、neratedanddistributed,topointouthowthespecimen'smagneticandelectricaleffectsrelatetoeddycurrents,andtoprovidethebasicelectricalconceptsrelatedtoeddycurrenttesting.KEYWORDS:*Eddycurrenttests.AvailablefromtheNationalTechnicalInformationService,Springfield,Va.22161PRICECODE:PCA14/MFA

8、01CharlieChong/FionZhangProgramme