壓電型超聲波數據采集系統(tǒng)的開發(fā)與研究.pdf

1、西安石油大學碩士學位論文壓電型超聲波數據采集系統(tǒng)的開發(fā)與研究姓名：徐娟申請學位級別：碩士專業(yè)：機械電子工程指導教師：湯楠20050515英文摘要Subject：DevelopmentandStudyingofthePiezoelectricUltrasonicDataCollectingSystemSpeciaHty：Name：InstructorMechanicalandElectronicEngineeringXuJuan(sign

2、ature)!i照TangNan(signature)ABSl。RA(I’Long—distancepipelinehasanirreplaceablefunctioninpetrochemicalindustryandnaturalgasindustryCurrentlyin01117countrythepipelinetransportingoilandnaturalgashasreachedmorethan300，000KM，mo

3、stofthepipelinehasservedformorethan20yearsIthasalreadyreachedthehighincidenceseasonoftheaccidentThehazardthattheleakageaccidentofthepipelinecausesisnotmerelyenormouseconomiclosses，andthemoreimportantthingisthepollutionof

4、thehumanlivingenvironment，eventheextensivedisasteraccidenttakesplaceOnlythroughperiodicpipelinedetection，wecanknowthepipelinecorrosioncondition，findtheproblemsintime，takethefavorablemeasures，avoidthefrequentlyhappeningof

5、pipelineleakageaccidentThereforethepipelinecorrosiondetectionbecomesakeytoloweringcostofoilandnaturalgasThisthesisonthebaseofthelong—distancepipelinecorrosiondetectiondevelopssomenecessarypreviousresearchworkItanalyzespr

6、imeprincipleoftheultrasonicdetectionsystem，theconstructionandprimeprincipleofultrasonicdetectioncircuit，designsanultrasonictransducerintelligentexcitationunit，whichcarlbeadjustedtheoutputvoltageandfrequencyaccordingtoena

7、ctmentnalsodesignsdatacollecting，memorizingsysteminrealtime，moreovercarrysondigitalsignalprocessingthroughusingtherelevantanalysisandspectrumanalysistechnologyconsequentlyobtainspreliminaryconclusionsAtlastitstudyswavele

8、tapplicationinthelong—distancepipelinecorrosiondetectionKeywords：pipelinecorrosion；ultrasonicdetection；datacollecting；digitalsignalprocessingThesis：ApplicationStudy(ThepaperissupportedbyScienceInnovationFoundationofXi’an