两相流电容层析成像技术的研究

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1、哈尔滨理工大学博士学位论文两相流电容层析成像技术的研究姓名：陈德运申请学位级别：博士专业：测试计量技术及仪器指导教师：孙立镌20060301晗尔滨理工太学工学博士学位论文，对戚像造成豹影鹩，绩合成像系统噪声水平和敏感矩阵特性，懿立了一种基予矩终运算蕊广义遂敏感矩阵求缌方法。该方法将测量数据与橡建斡广义逆敏感矩阵进行运算，从丽得到截预图像，解决电容成像不稳定性及半收敛性弱鼹，为电容层辑威缘系绩豹研究提供毅的理论辩方法。5．电容蘑薪袋豫湔量系统软件的设诗及开发根据敏感特性和本文提出的传感器场域剖分原则，采用MATLAB椰C港畜开发爨了毫容层耩或像系统懿分季嚣嚣潦量骏彳孛，软斧能够宠波敏感凌

2、螽域囱H幼剖分、计算及电场特性分析：剐’本文建立的离散相分布阁像重建数学攘篷帮浊水含率计算熬数掌模型及提出鲍具毒一定鑫适艘潮值瓣露豫璧建亵油水含率计算算法进行了察现，采用遗传算法对其进行编码以提高图像爨建毂姨敛速发；完成了浊水褥檩滤阐像熏建和浊水含率的计算。关键词电容层析成像；电容敏感场；图像爨建：优化设计；流型辩识：禽攀诗舅·ll*R嚣SEARCHoN嚣L嚣CT薹娃CALCAPAC薹鼍度NC嚣TOMOGRAPHYTECHNIQUEoFTWO．P默SEFLOWAbstractElectricalcapacitancetomography(ECT)isanoveltechnologyof

3、computerisedtomography(CT)broughtforwardbyUMISTofU．K．intheIate1980s，whichhasanumberofcapacitiveelectrodesmountedevenlyaroundtheperipheryofmeasuredobject，andmeasuresthecapacitancevaluebetweenelectrodestoknowthedistributionofdielectricconstant．whichismainlyusedindetectionofmulti．phaseflowinindustr

4、ialpipeline。Itcanrevealthevisualinformationofeveryphaseinclosepipelineorvesselsuchasconcentration，distributionandstatusofaction，butthegeneralinstrumentscannot．Incomparisonwiththeothertechniques。EeThasitsadvantagesofextensiveapplicability,beingnoninvasive，safetooperate，low-cost，whichcanbeappliedt

5、ogeneralmulti-phaseflowinindustrialprocessofproductionandissuitabletobeusedinChina．MoreprofoundstudyisfocusedonthekeyproblemssuchasfielddistributionmodelofECTsystem，optimizeddesignoftransducers，imagereconstructionalgorithm，flowregimerecognitionandcorrespondingsoftware．Thestudywehavedoneisasfollo

6、ws．1．PrincipleanalysisofECTsystemThemathematicalmodelofcapacitancesensitivityfieldispresentedaccordingto懦eprincipleanalysisofECTsystemandthefollowingstudyisbasedonit。Theresultsofflowregimerecognitionandimagereconstructionprovethatthemodelisreasonalbe．、2．Capacitancesensitivitydistributionobtained

7、basedonthefiniteelementmodelofcapacitancesensitivityfield．Ⅱ1．Thefiniteelementmodelsofequalandunequalmeshspacingsaredonerespectivelyaccordingtothecharacterofsensitivitydistribution．Theprocessofmeshplottingisautomatic．Finallyb