基于磁性传感器信息融合的油管损伤在线检测技术

(,200030)(,430074):,,,,,:;;;:TG115.28:A:100026656(2002)0920375206MAGNETICSENSORDATAFUSION2BASEDTECHNIQUESFORON2LINEDETECTIONOFFAULTSINOILPIPELINESJINJian2hua(DepartmentofInstrumentEngineering,ShanghaiJiaotongUniversity,Shanghai200030,China)YANGShu2zi(HuazhongUniversityofScienceandTechnology,WuhanHubei430074,China)Abstract:Themagneticsensordatafusionmodelsuitableforthedetectionofpipelinedamagewasestablishedandclassifiedintofourlevels.Onthebasisofthemodelandclassification,therelevantmagneticsensordatafusionmethodswerediscussedindetail,whichwereusedtoaccomplishtheclassificationoflocalizedfaultsandtheirseverity,thequalita2tivedecisionsofwalllossandthefusionofthewalllossdetectiondatafromsensorsrespectively.Severalexampleswereprovidedandtheresultsshowedthatthemagneticsensordatafusion2basedon2lineinspectionsystemforthefaultsinoilpipelinesmadefulluseofinformationandhadhighaccuracy,reliabilityandrobustness.Keywords:Oilpipeline;Fault;Magneticsensor;Signalprocessing,,[1,2],[27],,[812]:2002202222,[7,1315],,;,,,157324920029NDTVol.24No.9Sep.2002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,,,,,,,BxBy,,,,,,,,,,,,,,(),,,,,,,,,,,,,,,,,,,,,,,2,,,,[16](1),,,1673:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,,,,,,;,,,,,(2)2,2.1,,,2.2,,,;,2.3,,2.4,,1;2,;3,3,,,,773:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3.1[8][7][7],[7,17]Bayes[13]Dempster2Shafer(D2S)[8,18]3.1.1,,,,,,,,,33BPnX=(x1,x2,,xn),Xm,xi=(xi1,xi2,,xim)(i=1,2,,n)[7]xij(i=1,2,,n,j=1,2,,m),wk(k=1,2,,l),wk,,,,,,BP[19](),,,,110mm(w1w10),100,50,,BP,,100%,BP,100%96%3.1.2N2P[7],,(),(),,,,N2P4,M,i(i=1,2,,M)iui,ui=0();ui=1u=(u1,u2,,uM)T,uuui,873:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.4N2PaiPfiPdiP(s)f,,P(s)fP(s)d,P(s)m,Neyman2Pearson(N2P)[17]N2P,aTu=Mi=1aiuit(1)aa=(a1,a2,,aM)TtP(s)f,,u=1;u=0M=8,,Pfi(i=1,2,,8)=0104,Pdi(i=1,2,,8)=0.96,t=10,N2PP(s)f=5.1804e-4P(s)d=0.9998,N2P,,3.2,,,,,[7][20][21]MAtm=(ŠAt1,ŠAt2,,ŠAtM),,AtmAtM^At=Mi=1wiŠAti(2)Mi=1wi=1(3)^Atwi(0wi1)wi[7]950179mm2,ŠAti(i=1,2,,8),952.10,939.80,952.72,944.11,946.88,949.47,952.86,950.79mm2,[7]950102mm2,948159mm2,^At,4,,,,,,,,,,973:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,,,,,,,,,,,5,,;,,,,:[1],,,.[A].[C].:1999.[2],,,.[J].,1997,25(11):43-46.[3],,,.[J].,1998,26(4):28-31.[4]JinJianhua,KangYihua,YangShuzi.Animprovedcor2rosioninspectionandmonitoringinstrumentforusedoilwelltubing[J].MaterialsPerformance,2000,39(2):72-75.[5],,.[J].,2000,(11):18-20,24.[6],,.[J].,2001,23(2):55-58,77.[7].[D].:,2001.[8]LlinasJ,WaltzE.MultisensorDataFusion[M].Boston:ArtechHouse,1990.[9]HallDL.MathematicalTechniquesinMultisensorDataFusion[M].Boston:ArtechHouse,1992.[10]AbidiMongiA,etal.DataFusioninRoboticsandMa2chineIntelligence[M].Boston:AcademicPress,1992.[11]LuoRC,MichaelG.MultisensorIntegrationandFu2sionforIntelligentMachinesandSystems[M].Nor2woodNJ:AblexPublishingCorporation,1995.[12]JoshiRajive.MultisensorFusion:AMinimalRepresen2tationFramework[M].Singapore:WorldScientific,1999.[13]GrosXE,StrachanP.BayesianapproachtoNDTdatafusion[J].INSIGHT,1995,37(5):1354.[14]GrosXE,StrachanP.TheoryandimplementationofNDTdatafusion[J].ResearchinNondestructiveEval2uation,1995,6(4):227-236.[15]GrosXE,BousigueJ.NDTdatafusionatpixellevel[J].NDTandEInternational,1999,32(5):283-292.[16],,.[J].,1994,16(3):1-11.[17]VarshneyPramodK.DistributedDetectionandDataFusion[M].NewYork:Springer,1997.[18]ShaferG.AMathematicalTheoryofEvidence[M].Princeton,NewJersey:PrincetonUniversityPress,1976.[19]RumelhartDE.Learningrepresentationbyback2propa2gationerrors[J].Nature,1986,323(9):533-536.[20]RaoBS.Afullydecentralizedmultisensorsystemfortrackingandsurveillance[J].InternationalJournalofRoboticsResearch,1988,12(1):20-45.[21]LuoRC,etal.Dynamicmultisenserdatafusionsystemforintelligentrobots[J].IEEEJournalofRoboticsandAutomation,1988,4(4):386-396.083:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.