光纖傳感系統(tǒng)中的信號處理研究.pdf

1、華中理工大學博士學位論文光纖傳感系統(tǒng)中的信號處理研究姓名：劉德明申請學位級別：博士專業(yè)：物理電子學指導教師：黃德修19991101華中理工大學博士學位論文hh____●●■_______●_____●__●■■■■●___________●_______________________■■■_一ABSTRACTSignalprocessingisthecoreofafiberoptlcsensingsystem，whichisdirec

2、tlyrelatedwithaseriesofimportantperformancesofthesystem，suchassensitivityprecision，responsetime。stabilityaudreliabilityandisalsoconcernedwitlltheaccuracyandobjectiveevaluationofthemeasurementsSeveraltypicalandpracticalme

3、thodsforthesignalprocessingincludingthetheoriesandtechniquesarediscussedinftfisthesisbasedontheresearchoftheprojectsundertakenbytheauthorThemajorinnovativeworksinthisthesisElsepresentedaqthefollowing：1)Variouserrorfactor

4、sthatinfluencetheperformanceofanopticalfibercnrreflttransducer(0FCnsystemhavebeensyntheticallyanalyzedAnationalinventionpatentispatforwardtosolvetheproblems，whichhastheautocompensationfunationforthedisturbanceofthepolari

5、zationofstateandthedriftofthetemperature2)ApracticalOFCTnteasurefflentsetupwithcompletefunctionalsoftwarehasbeendeveloped兩eexperimentalresultsshowthatitisveryeffectivewiththispatentt0suppressthepolarizationnoisetheoptica

6、lcouplingnoiseandⅡwtemperaturedriftnoiseandtogreatlyimprovethesystemperformances3)Thespectralcharacteristicsoftheback，scatteringinadatafiberhavebeenstudiedtheoreticallyandexperimentallyThespectraofthecontinualRaleighscat

7、teringStcckesscatteringandAntiStockesscatteringhavebeenobservedintheexperimentsTherelationshipofbackscatteringspectrawiththevariationoftheworkingconditionoftheexcitinglightsoBrcehasalsoheenanflyzed，whichprovidetheusefuld