基于雙電流源激勵的電阻層析成像測量技術(shù)研究.pdf

1、中國石油大學（華東）碩士學位論文基于雙電流源激勵的電阻層析成像測量技術(shù)研究姓名：劉景申請學位級別：碩士專業(yè)：檢測技術(shù)與自動化裝置指導教師：石天明20090501ElectricalResistanceTomographicMeasurementBasedonInjectingDualCurrentSourcesLiuJing(DetectionTechnologyandAutomaticEquipment)DirectedbyProfS

2、hiTianmingAbstractElectricalresistancetomographyreconstructstheinternalconductivity(orimpedance)profileofanobjectbyapplyingcurrentsintotheobjectandmeasuringvoltagesbetweentwoelectrodesmountedontheobjectboundaryThisthesis

3、presentsapreliminaryresearchworkofemployingtwocurrentsourcestogenerateameasuringelectricfieldsuitableforERTmeasurementTheworkisaimingatincreasingthenumberofindependentmeasurementsthroughwhichtoobtainbetterERTimageswithou

4、ghttheneedofmoreelectrodesasrequiredinatraditionalsinglecurrentsourceERTsystemsetupthatarecommonlyadoptedbymostERTresearchesaroundworldThediscussioninthisthesisincludes：1UsingbothAnsysandMatlabtoestablishaforwardsolverto

5、generatethevoltagemeasurementsunderdifferentdualcurrentconfigurationsThisworkensuresthatallthesoftwaredevelopedwithMatlabforFEMcalculationCanbeverifiedbyAnsys2Obtaingandanalyzingthesensitivityfielddistributionwithinthepi

6、pecrosssectionunderdifferentdualcurrentconfigurationsThisworkisrequiredasprovidingatechnicalbaseforchoosingappropriateinversionalgorithmsforERTimagereconstructions，aswellasfordesigningadualcurrentsourceERTmeasurementsyst

7、em3AnalyzingthepreliminaryresultsofimagereconstructionofdualcurrentsourceERTdatabasedonthesensitivitymethodalgorithm4AnalyzingthepreliminaryresultofimagereconstructionofdualcurrentsourceERTbybasedonthemodifiedNewtonRaphs

8、onmethodalgorithmTheworkprovidessomeusefulexperiencesandformsausefulfoundationforthefutureresearchworkondualcurrentsourceERTdevelopmentKeywords：ElectricalResistanceTomography，imagereconstruction，sensitivityfields，dualcur