基于stdr2fsstdr的铁路信号电缆故障在线检测系统的分析

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4、otherfactorsresultinincreasedprobabilityofoccurrenceofsignalcablefault．Therefore，thecablefaultdetectionhasattractedincreashagattention．UsingtraditionaIoff-linedetectionmethod，therearemanydrawbacks：intherepairprocess，itcancreateadditionalparkingandpowerloss，besides，theefficiencyisverylowandthedete

5、ctionprecisioniSnothigh．Ontheotherhand，theintermittentarcfaultofthecable．themaintenanceoftimeiSveryshort．generallyitisunabletoreproducewhenthecabledoesnotwork．andthetraditionalofflinedetectionmethodsiSdimculttodetect．ThispaperusestheSTDR／SSTDR’Son—linedetectionmethodsforthecontinUOUSdetection．The

6、lOWtestsignallevelandhighnoiseimmunitytestmethodiSverysuitablefortheintermittentfaultofthecableonlinedetectionandlocation．Basedontheanalysisofthetraditionalcablefaultdetectionmethod，thepaperpointsouttheirrespectiveadvantagesanddisadvantages，andthenfocusesonspread．spectrumtime—domainreflectometry，

7、whichiSverysuitableforon．1inefaultdetection，namelySTDR／SSTDRmethod．First，throughtheoreticalanalysisandresearchOilSTD刚SSTDRmethod，thesystem’Smainkeytechnologyisdiscussedinbrief．Thenthedetectionsystemmodelisestablished．Next，fromthewholesystemmodel，thepaperwillspecificallyanalysetherealizationofeach

8、moduleofthesystemandtheparametersontheeffectofperformance．AroundstructuremoduleoftheSTDR／SSTDRsystem．theauthorwillstarttodeploythispaper．Thissystemismainlycomposedofasignaltransmittingmodule，signalacquisitionmodule，correlatedmodulesandSOonbasicmodules．Inthesignaltransmissionmodule．weneedtofindout

9、thebest1aunchsequencefromalargenumberofpseudo—randomsequencesthroughⅣ【ATLABsimulationandcomparison．Aftersequenceselection．fromthepointofviewofSNR．thepaperwilltheoreticallyanalysethesequencelengthandchiprateandSOonfacto