供水管道泄漏聲信號數據采集系統(tǒng)研究

1、重慶大學碩士學位論文供水管道泄漏聲信號數據采集系統(tǒng)研究姓名：顏小云申請學位級別：碩士專業(yè)：儀器科學與技術指導教師：李平20070420英文摘要ABSTRACTWiththerapiddevelopmentoftheworldpopulationandeconomythewasteofwaterresourc船hasbecomeoneofthemainfactorswhichrestrainthedevelopmentofsocialec

2、onomyEveryyearourcountrysuffersanastonishinglossbecauseofwatersupplypipelineleakThewaterleaknotonlywastesthepreciouswaterbutalsocreateshugeeconomiclossThemainresearchpurposeoftheexpertswhoaleengagedinthewatersupplypipeli

3、nejobsistoprovideeffectiveleakdetectionmethodsandinstrumentsforthepipelineengineersThispaperdevelopsadataacquisitionsystemforacousticsignalofleakingwatersupplypipesAccordingtotheneedsofleaklocalization，thissystemhasthefu

4、nctionofsigrlalconditioningdataacquisitionandtransmissionUSBcommunicationliquidcrystaldisplayeteItprovidestheessentialdataforthesignalprocessingoftheleakdetectionBasedonthetheoretiealresearchontheleakacousticsignalandcor

5、relationpositioningaswell鼬LMStimedelayestimationthispaperstudiesthenoiseinfluenceonthevarianceoftimedelayestimationgivessomemethodstosuppressthenoisebothfromlcakdetectionenvironmentandsystemcircuitAsthesystemoftenc凋trgie

6、sonthefieldoperationthedataacquisitionsystemalsohaslowpowerconsumptionInthispaperSCM(SingleChipMicroprocessor)isselectedtobethemastercontrolunitAfteranalyzingthedemandsofnoiseandpowerconsumptionwepresentedtheintegraldesi

7、gnschemeofthedataacquisitionsystemAstheamplitudeofleaksignalisvariedwiththepipeinternalpressureandleaksituationbandpassfilterandprogrammed群IinamplifieraremcdtoimprovesignalacquisitionabilityandreducethequantizationaqlOLU

8、SBisadoptedtealizefastorderanddatatransmissionLiquidcrystaldisplayisusedtoenhancethesystemmanmachineinteractionabilityTheembeddedsoRwareisdesignedbyusingClanguageandliquidcrystaldisplaychalactermodelisestablishedmanually

9、SoRwareprogrammingthoughthasalsobeenintrodacodThetestsofthecircuitnoiseandpowerconsumptionindicatethesystemhasachievedthelownoiselowpowerconsumptiondesigngoalTheexperimentsofthefiltereffectandtheADCeffectivenumberofbitst