基于动态压力变送器的输油管道泄漏检测与定位系统

22920099CHINESEJOURNALOFSENSORSANDACTUATORSVol.22No.9Sep.2009:(60534050);(06YFJMJC02000):2009204222:2009205208LeakDetectionandPositioningSystemofOilPipelineBasedonDynamicPressureTransmitter3ZHANGYu,CHENShili,LIJian,ZHUGEJingchang,JINShijiu3StateKeyLaboratoryofPrecisionMeasuringTechnologyandInstruments,TianjinUniversity,Tianjin300072,ChinaAbstract:Aleakdetectionandpositioningsystemofoilpipelinebasedondynamicpressuretransmitterisdesigned,andthesystemcompositionandtestingprinciplearespecified.Dynamicpressuresignalsalongthepipelinecanbeobtainedbydynamicpressuretransmitter,andthenthepipelineleakcanberecognizedbysupportvectormachine(SVM)throughtheeigenvectorsofthesignalsextractedbyempiricalmodedecom2position(EMD).Atlastthepositionofleakingpointiscalculatedbyadoptingthecorrelationtimedelayal2gorithm.Theapplicationexamplesshowthatthedynamicpressuretransmitterhashigherdetectionsensi2tivityandleakresolution.Thesystemcanidentifythepipelineleakcorrectly,reducefalsealarmrateeffec2tivelyandimprovedetectionsensitivityandpositioningprecision.Keywords:pipeline;leakdetection;dynamicpressuretransmitter;empiricalmodedecomposition;supportvectormachineEEACC:7210B3,,,,3,300072:,,,,,,:;;;;:TE97316:A:100421699(2009)0921347205,,,,[1],[2],,1,,,,,,,[3],,1,,,,,,112,,,,,(),,[4],Q=CVQ,;C,;V,ACf,2,qa,Ca,uoqauo=AqaCa+Cf-ACf(1)23,3(b),0102MPa,3(a),,15V(250,420mA,3V),,,,32211,84312009,(EMD)[5]IMF[6]N,C2N=N(N-1)/2:x(t)EMD:x(t)=ni=1ci(t)+rn(t)(2)ci(t)x(t)iIMF,rn(t)nIMF,Ti=1nnk=1c4ik(3)Ti=Timi=1Ti(4)TiiIMF,TiiIMF,T=[T1,T2,,Tn](5),(6),minwij,bij,ij12(wij)Twij+Ctijt(wij)T(wij)T(xt)+bij1-ijt,yt=i(wij)T(xt)+bij-1+ijt,yt=jijt01(6)212L,X,a,:X=L+at2(7)x1(t)x2(t)t,[7]R()=-x1(t)x2(t+)d(8),,=0,R(),,T,x1(n)x2(n),nN,R(m)=1NN-1n=0x1(n)x2(n+m)(9)mRm=m0,m0T,(7)3,94121km,457mm,57km,,1000Hz311EMD,6IMF4,3:20,10,5,,330,11,,9617%94319,:42113GHzCPU,2G,0105137s5312,110,47156s,0111s1200m/s,571072km,57km,204m,[8]112345/s47.5147.6047.6747.4847.57/km57.01257.12057.20456.97657.084678910/s47.4647.6347.6647.4847.54/km56.95257.15657.19256.97657.0484,,9617%,204m,,:[1],.[J].,2005,25(6):1052109.[2],,.[J].(),1998,19(3):93297.[3]ChenShili,SunYan,WangLikun,etal.DevelopmentonDy2namicPressureMonitoringMethodandSensorforLongPipe2lineLeakDetection[C]//Proceedingsofthe7thInternationalPipelineConference,Calgary,Canada,2008,Calgary,Canada:ASME,2008.[4],.[M].:,2004.[5]HuangNordenE,ShenZheng,LongStevenR,etal.TheEm2piricalModeDecompositionandHilbertSpectrumForNonlin2earandNon2StationaryTimeSeriesAnalysis[J].ProceedingsoftheRoyalSocietyA:Mathematical,PhysicalandEngineer2ingSciences,1998,454(1971):9032995.[6]HsuChih2Wei,LinChih2Jen,AComparisonofMethodsforMulticlassSupportVectorMachines[J].IEEETransactionsonNeuralNetworks,2002,13(2):4152425.[7],,.[M].:,1994:2702273.05312009[8]LiJian,WangLikun,ZhouYan,StudyonDetectionTechniqueforPipelineLeakage[J].TransactionsofTianjinUniversity,2003,9(2):1122114.(19822),,2006,,,[e-mail],,,,,15319,: