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基于光纤法布里-珀罗传感的高速气流测量系统 Title:AHigh-SpeedAirflowMeasurementSystemBasedonFiber-OpticFabry-PerotSensing Abstract: Withtheincreasingdemandforaccurateandfastairflowmeasurementinvariousindustriesandapplications,thedevelopmentofefficientandreliableairflowmeasurementsystemshasbecomeessential.Thispaperpresentsahigh-speedairflowmeasurementsystembasedonfiber-opticFabry-Perotsensingtechnology.ThesystemutilizestheprincipleofinterferenceinaFabry-Perotcavitytodetectchangesinairflowvelocity,providingreal-timeandaccuratemeasurements.Experimentalresultsdemonstratethesystem'scapabilitytomeasurehigh-speedairflowaccuratelyanditspotentialforvariousindustrialandscientificapplications. 1.Introduction 1.1Background Innumerousindustrialapplicationssuchasaerodynamicsresearch,windtunneltesting,andventilationsystemassessment,accurateandprecisemeasurementsofairflowvelocityarecrucial.Traditionalmethodsforairflowmeasurementsufferfromlimitationssuchaslowaccuracy,highcost,andinadequateresponsetime.Thus,theneedforanefficientandreliablehigh-speedairflowmeasurementsystemhasemerged. 1.2Objectives Theprimaryobjectiveofthisresearchistodevelopahigh-speedairflowmeasurementsystemusingfiber-opticFabry-Perotsensingtechnology.Theproposedsystemaimstoovercomethedrawbacksofconventionalmeasurementmethodsbyofferinghighaccuracy,fastresponsetime,andcost-effectiveness. 2.PrincipleofFabry-PerotSensing 2.1Fabry-PerotCavity TheFabry-Perotcavityconsistsoftwopartiallyreflectivemirrorsseparatedbyaspacer.Whenlightisincidentonthecavity,multiplereflectionsoccur,resultingininterferencepatterns.Thechangingdistancebetweenthemirrorscausedbyairflowinterruptionleadstoacorrespondingchangeintheinterferencepatterns. 2.2Fiber-OpticFabry-PerotSensing Infiber-opticFabry-Perotsensing,onemirrorisreplacedwithafibertipthatactsasareflectivesurface.Thereflectedlightisthentransmittedbacktoaphotodetector,convertingitintoanelectricalsignal.Thesignalundergoesdigitalprocessingtodeterminethechangesininterferencefringes,representingtheairflowvelocity. 3