基于小波包分解及AR模型的单通道地震波信号初至点检测
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摘要
地震波信号的初至点检测在核爆地震的自动识别中起着重要作用,本文描述了一种单通道地震波信号初至点检测方法,它是基于小波包分解及对大地噪声信号进行统计分析后建立的大地噪声模型———AR模型而提出的.文中对该方法进行了理论分析及实际地震波信号检验.研究结果表明,该方法对地震波信号具有很强的自适应能力,能定量确定初至点的位置.
Distinguishing onset points of seismic signals is important in the automatic identification of underground nuclear explosions and natural earthquakes. This paper presents a method of onset point detection of single channel seismic signals based on wavelet packet and the AR model. Theoretical analysis and test of seismic signals indicate that this method is strongly self_adaptive to seismic signals and can detect the position of the onset in seismic trace precisely.
Distinguishing onset points of seismic signals is important in the automatic identification of underground nuclear explosions and natural earthquakes. This paper presents a method of onset point detection of single channel seismic signals based on wavelet packet and the AR model. Theoretical analysis and test of seismic signals indicate that this method is strongly self_adaptive to seismic signals and can detect the position of the onset in seismic trace precisely.
引文
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[2]李慧婷,黄文辉.三分向数据震相的自动识别.华南地震,2000,20(4):46～53LiHT,HuangWH.Automaticidentificationofthree_component seismicphase.SouthChinaJournalofSeimology(inChinese),2000,20(4):46～53
[3]任继阳.关于P波到时的小波分析方法.玉溪师范高等专科学校学报,1999,15(3):33～36RenJY.WavelettransformmethodsforPphaseidentificationin three_componentseismograms.JournalofYuXiTeachersCollege(in Chinese),1999,15(3):33～36
[4]刘希强,周蕙兰,沈萍等.用于三分向记录震相识别的小波变换方法.地震学报,2000,22(2):125～131LiuXQ,ZhouHL,ShengP,etal.Wavelettransformmethodsfor three_componentseismicphaseidentification.ActaSeismologica Sinica(inChinese),2000,22(2):125～131
[5]沈萍,郑治真,刘希强等.小震的综合识别研究.地震学报,2002,24(2):169～175ShengP,ZhengZZ,LiuXQ,etal.Studyonthemethodfor comprehensivediscriminationofsmallequakequakes.Acta SeismologicaSinica(inChinese),2002,24(2):169～175
[6]AllenRV.Automaticearthquakerecognitionandtimingfromsingle traces.Bull.Seism.Soc.Amer.,1978,68(5):1521～1532
[7]CoppensF.Firstarrivalpickingoncommon_offsettracecollections forautomaticestimationofstaticcorrection.Geophys.Prospec.,1985,33(8):1212～1213
[8]RamananantoandroR,BemitsasN.Acomputeralgorithmfor automaticpickingofrefractionfirst_arrivaltime.Geoexploration,1987,24(1):147～151
[9]邹红星.地下核爆炸和天然地震自动识别研究[硕士论文].西安:第二炮兵工程学院,1995ZouHX.Onautomaticrecognitionofundergroundnuclearexplosion andnaturalearthquake[Master’sthesis](inChinese).Xi’an:The SecondArtilleryInstituteofEngineering,1995
[10]刘希强,周蕙兰,郑治真等.基于小波包变换的弱震相识别方法.地震学报,1998,20(4):373～380LiuXQ,ZhouHL,ZhengZZ,etal.Micro_seismicphase recognitionbasedonwaveletpackettransform.ActaSeismologica Sinica(inChinese),1998,20(4):373～380
[11]宋新,刘次华,甄新.奇异点检测的小波方法在信号初至时提取中的应用.湖北汽车工业学院学报,2001,15(2):37～40SongX,LiuCH,ZhenX.Cuspdetectionmethodbywaveletsand applicationinpickingfirstarrivals,JournalofHubeiAutomotive IndustriesInstitute(inChinese),2001,15(2):37～40
[12]BoschettiF,DentithDM,ListDR.Afractal_basedalgorithmfor detectingfirstarrivalsonseismictraces.Geophysics,1996,61(4):1095～1102
[13]常旭,刘伊克.Hausdorff分数维识别地震道初至走时.地球物理学报,1998,41(6):826～832ChangXu,LiuYK.Distinguishingseismicfirstbreakbymeansof Hausdorfffractaldimension.ChineseJ.Geophys.(inChinese),1998,41(6):826～832
[14]韩小俊,施泽进,李亚林.利用分形维拾取地震波初至的一种改进算法.石油地球物理勘探,2002,37(1):60～63HanXJ,ShiZJ,LiYL.Animprovedalgorithmforpickingup seismicfirstarrivalsbyusingfractaldimension.OilGeophysical Prospecting(inChinese),2002,37(1):60～63
[15]王海军,刘贵忠,范万春.广义分维在地震信号初至检测中的应用.核电子学与探测技术,2004,24(6):634～637WangHJ,LiuGZ,FanWC.Theapplicationofgeneralizedfractal inarrivaltimedetectionofseismograms.NuclearElectronics&DetectionTechnology(inChinese),2004,24(6):634～637
[16]曾富英,李敏锋,申维.地震波初至拾取的分形研究.现代地质,2002,16(2):209～213ZengFY,LiMF,ShenW.Thefractalstudyondetectingarrival timeofthefirstbreak.Geoscience(inChinese),2002,16(2):209～213
[17]曹茂森,任青文,万林海等.Length分形维算法市区地震波初至.石油地球物理勘探,2004,39(5):509～514CaoMS,RenQW,WanLH,etal.Lengthfractaldimension methodforpickingseismicfirstbreak.OilGeophysicalProspecting(inChinese),2004,39(5):509～514
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