资源描述：
《管道漏磁采集数据分析与仿真研究》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、上海交通大学硕士学位论文管道漏磁采集数据分析与仿真研究姓名：张玉良申请学位级别：硕士专业：测试计量技术及仪器指导教师：阙沛文20060101上海交通大学硕士学位论文摘要THEANALYSISOFPIPELINEMFLANDSIMULATIONRESEARCHABSTRACTCurrentlyitiswithgreatpracticaleffecttoresearchanddevelopasetofseabedoilpipelinesinspectionequipmentfortheoilindustryinourcountry.Inorder
2、toassurethesafeoilconveyance,it’sveryimportanttocarryonroutineinspectionofseabedpipelinestofindoutthedefectsofthepipelinesasearlyaspossible.Thisresearchisoneofthemostimportantpartsofthenational863keyproject–“RobertandDetectiontecnologyinoceanpipeline”.Themaintaskofthisresea
3、rchistobuildamagneticfluxleak(MFL)detectionsystembasedonFlatmetal-board.Thenanentiredatabasewhichincludingthe3DinformationofMFLisfoundedbyANSYS.ThedatabaseisusedastheexamplesforthetrainingofNeuralNetworks.Firstly,thedissertationbrieflyintroducestheMFLdetectionprinciple.Then
4、brieflyintroducesthemakeupoftheMFLdetectionsystemwhichiscomposedbymechanicaldevice,Hallsensorarray,hardwarecircuit,ADwinDataAcquisitionsystem,andthevirtualinstrumentsystem.TheVirtualinstrumentisprogrammedbyVisualBasicwhichisusedforcontrollingthedataacquisitionandsavingproce
5、ss.Intheexperiment,wedetecttheMFLsignalofdefectinflatmetal-board,analyzetheinfluenceindifferentsizeofcolumnedandrectangledefecttotheMFL.Accordingtothemaincharacterofdefectsuchasdepth,widthandlength,sumupthegeneralconclusionbetweentheMFLanddefect.ThatistheareaofMFLisincrease
6、dwhilethedefectsizeisincreased,andthesignalofMFLreflectstheshapeinformationofdefect.Thisdissertationalsointroducestheprincipleandmethodoffiniteelementinsolvingthemagneticfieldproblem.3Dmodulesofdefectsarebuiltby第II页上海交通大学硕士学位论文摘要ANSYS,thendosimulationtosolvetheproblemandwor
7、kouttheMFLresult.Usingplottoanalyzethedifferencebetweenthedetectresultsandsimulationresults.Inordertoincreasetheworkingefficiency,theAPDL(ANSYSParametricDesignLanguage)isusedintheexperiment.Finally,inordertorebuildthefigureofdefectfromMFLsignal,aprojectofNeuralNetworksispro
8、posed.KEYWORDS:Non-destructiveTesting,Flatmetal-boardinspection,MagneticFluxLeakag
