Introduction to Eddy Current All

《Introduction to Eddy Current All》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、EddyCurrentTesting-AnIntroductionPart-1of22014-NovemberMyASNTLevelIIIPre-ExamPreparatorySelfStudyNotesCharlieChong/FionZhangCharlieChong/FionZhanghttps://www.nde-ed.org/EducationResources/CommunityCollege/EddyCurrents/Graphics/Flash/DifferentialvsAbsolu

2、teAnim.swfCharlieChong/FionZhangFionZhang2014/Novemberhttp://meilishouxihu.blog.163.com/Shanghai上海CharlieChong/FionZhangShanghai上海CharlieChong/FionZhangShanghai上海CharlieChong/FionZhangGreekletterCharlieChong/FionZhang看不了”YouTube”学习视频.我是一个聪明的梯子,用来干什么你懂的C

3、harlieChong/FionZhang我是一个聪明的猴子CharlieChong/FionZhanghttp://v.qq.com/cover/u/ujnamwpqg1xg8qm/y0012j6s11e.htmlOffshoreInstallationsCharlieChong/FionZhangOffshoreInstallationsCharlieChong/FionZhangETExpertatWorksCharlieChong/FionZhanghttp://ropax.co.uk/edd

4、y-current-inspection.htmlExpertatWorksCharlieChong/FionZhangETExpertatWorksCharlieChong/FionZhangContents1.Introduction2.ThePhysics3.Instrumentation4.Probes(Coils)5.ProceduresIssues6.Applications7.AdvancedTechniques8.QuizzesCharlieChong/FionZhang1.0Intr

5、oduction1.1BasicPrinciplesofEddyCurrentInspectionEddycurrentinspectionisoneofseveralNDTmethodsthatusetheprincipalof“electromagnetism”asthebasisforconductingexaminations.SeveralothermethodssuchasRemoteFieldTesting(RFT),FluxLeakageandBarkhausenNoisealsous

6、ethisprinciple.Eddycurrentsarecreatedthroughaprocesscalledelectromagneticinduction.Whenalternatingcurrentisappliedtotheconductor,suchascopperwire,amagneticfielddevelopsinandaroundtheconductor.Thismagneticfieldexpandsasthealternatingcurrentrisestomaximum

7、andcollapsesasthecurrentisreducedtozero.Ifanotherelectricalconductorisbroughtintothecloseproximitytothischangingmagneticfield,currentwillbeinducedinthissecondconductor.Eddycurrentsareinducedelectricalcurrentsthatflowinacircularpath.Theygettheirnamefrom“

8、eddies”thatareformedwhenaliquidorgasflowsinacircularpatharoundobstacleswhenconditionsareright.CharlieChong/FionZhangEddycurrent-SurfaceprobeCharlieChong/FionZhanghttp://criterionndt.com/eddy-current-testing/eddy-current-theoryEdd