第46卷第3期2023年6月电子器件ChineseJournalofElectronDevicesVol.46No.3June2023项目来源:天津市教委科研计划项目(2018KJ256)收稿日期:2021-10-18修改日期:2022-02-22VibrationEventRecognitionAlgorithmofΦ⁃OTDRSystemBasedonTwo⁃LevelSupportVectorMachine∗ZHUHaiqiang1,ZHANGZhili2∗,GAOHuimin2,MAXiaoming2(1.SchoolofElectricalEngineeringandAutomation,TianjinUniversityofTechnology,Tianjin300384,China;2.IntelligentManufacturingCollege,TianjinSino⁃GermanUniversityofAppliedSciences,Tianjin300350,China)Abstract:Phasesensitiveopticaltimedomainreflectometer(Φ⁃OTDR)canrealizecontinuousanddistributedmeasurementwithhighsensitivityforvibrationsignals,soitisoftenusedfortheidentificationandclassificationofvibrationevents.However,thecurrentvibra⁃tioneventrecognitionalgorithmsoftenextractfeaturesfromasingledimension,suchastimedomainorfrequencydomain,whichcannotachievethefusionanalysisofmulti⁃dimensionalandlargesamplefeatureparameters.Atthesametime,theexistingalgorithmsgenerallyuseasimpleunipolarrecognitionalgorithm,whichhasarelativelysimplestructur...