声发射信号的参数分析方法

,1),2)(,100013):,:;;:TG115.28:A:100026656(2002)0220072206PARAMETERANALYSISOFACOUSTICEMISSIONSIGNALSSHENGong2tian,GENGRong2sheng1),LIUShi2feng2)(CentreofBoiler&PressureVesselInspectionandResearch,Beijing100013,China)Abstract:Thedefinitionofsimplewaveformparametersandanalysismethodsforacousticemissionsignalsaresystematicallyintroduced,includingparameterlist,singleparameteranalysis,historicalvarietyanalysis,distributionanalysisandcorrelationanalysis.Keywords:Acousticemissiontesting;Signalprocessing;Parameteranalysis(AE),,,,AE,,AE,,,,10-1510-9m,106(120dB),,:20012122071),1000762),100084,,;,,,[1],,;,2050,,,11[2](),2724220022NDTVol.24No.2Feb.20021,1(),,,222,,2,31(Hit)[3],,[3],,,,,,,,,dB(1V0dB),,,,,,,s,,s,(RMS),V,,,,,dBRMS,,s,,,,37:2minsmsskg/cm2ssdB011891017336.603819257322259011891032136.60121334948624351011891050036.604696286689955011891120736.608292753194751,,,3.1,,,(),,,N=f0lnVpVt(1)f0VpVt3.2,,,1,VrmsVms,V(t)Vms=1TT0V2(t)dt(2)Vrms=Vms(3)TV(t),Vms,t1t2EEt2t1(Vrms)2dt=t2t1Vmsdt(4)(),,,VrmsVms,,;,VrmsVms,;,VrmsVms3.3,,[4],N=Pfb(5)47:NPfb4,,2(Felicity)(Kaiser)5,,,,,,,,36,,,,AE,AE,,2;,,,22,MONPAC[5]45,,,(a)(b)(c)(d)257:(a)(b)(c)(d)(e)(f)3(a)(b)(c)(d)(e)(f)(g)(h)467:(a)(b)57,,,,,,,,,,:[1]HeipleCR,CarpenterSH.AcousticEmission[M].MathiewsJR,ed.NewYork:1981.[2]MillerRonnieK,McIntirePaul,eds.NondestructiveTestingHandbook(Vol.5)AcousticEmissionTesting[M].Secondedition,Columbus:AmericanSocietyforNondestructiveTesting,1987.[3]ASTME1316-1996,StandardTerminologyforNondestruc2tiveExaminations[S].[4]PollockAA.Acousticemissiondistribution[A].InternationalAdvancesinNondestructiveTesting(Vol.7)[R].1981.215-239.[5]StockbridgeScott,HoffmanJeff.Analysisofacousticemis2siondatafrommetalpressurevesselbyweighingofdataat2tributesincludingMONPACcriteria[A].ProgressinAcousticEmission[C].Japan:TheJapaneseSocietyforNDI,1994.(65),,,,,;,,,,,,,,,,4,;,,,A/D,I/O,,,:[1].[M].:,1995.[2],.[M].:,1981.[3].[M].:,2000.77: