用于兩相流檢測的電容層析成像系統(tǒng)的研究.pdf

1、華中科技大學碩士學位論文用于兩相流檢測的電容層析成像系統(tǒng)的研究姓名：潘時林申請學位級別：碩士專業(yè)：機械設計及理論指導教師：李元科20040510華中科技大學碩士學位論文AbstractElectricalcapacitancetomography(ECT)isanewtechniquedevelopedrapidlyinrecentyearsItisanovelapproachfortwo—phaseflowparametersmeas

2、urement，andhasgreatdevelopingpotentialinindustrialapplicationButcurrentlythereisstillalotofworktobedonebeforepracticaluseofthetechniqueThemainproblemsarethemeasurementoflowvaluecapacitance，imagereconstructionandSO0nThist

3、hesisbasedonthisfield’Scurrentresearchstatusandpracticalapplicationneeds，designsaECTsystem’Shardwarestructurebasedonupperandlowercomputerswhicharecooperatmg，demonstratestheAC—basedmeasurementcircuitwhichhasbeencurrentlyu

4、sedanddesignsthecorrespondingsignaltransformcircuitThistransformcircuitbecomestheoutputsignaltoDCsignalwhichiseasytreatmentandistransmittedtoLowercomputertotreatTheoreticalanalysisindicatesthishardwaresystemhasveryhighpr

5、ecisionformeasurementThrol】【ghanalyzingvariouscurrentlyusedimage—reconstructionalgorithms，anamendatoryimage—reconstructionalgorithmbasedoniterativealgorithmwhichisahigh—qualityimage—reconstructionalgorithmispresentedThis

6、arnendatoryalgorithm’SfeasibilityistheoreticallydemonstratedThesimulationresultsshowflmttheimage‘reconstructionqualityandprecisionofthisamendatoryalgorithmhavenoobviousdifferencecomparedwiththeprimaryiterativealgorithm，b

7、uttheimage—reconstruction’SspeedisobviouslyfasterSOthatcallsatisfytherequestofrealtimeflowpattemidentificationOnthebasisofpreviousresearchthisthesisrespectivelydesignstheupperandlowercomputers’softwaresystembasedonmodula

8、rizedesignmethodThewholesoftwaresystemletsthecouplecomputersdivideuptheworkandcooperateTheuppercomputercontrolsthelowertoconductdataacquisition，andconductsimagereconstructionworkafterreceivingthedatafromthelowerThewholeE