基于光纤布拉格光栅和放大基片的高灵敏度微位移传感器（英文）-豆柴文库

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基于光纤布拉格光栅和放大基片的高灵敏度微位移传感器（英文）
Title:High-SensitivityMicrodisplacementSensorbasedonFiberBraggGratingandAmplifiedSubstrate
Abstract:
Microdisplacementsensingplaysacrucialroleinmanyfields,suchasrobotics,structuralhealthmonitoring,andaerospaceengineering.Thispaperpresentsanovelhigh-sensitivitymicrodisplacementsensorbasedonacombinationoffiberBragggrating(FBG)andanamplifiedsubstrate.Theproposedsensoroffersenhancedsensitivity,accuracy,androbustnessoverexistingsensors,makingitsuitableforprecisedisplacementmeasurementsinvariousapplications.
1.Introduction
Microdisplacementsensingisthemeasurementofminutedisplacementswithsub-micrometerresolution.Itfindsapplicationsinawiderangeoffields,includingmachineautomation,medicaldiagnostics,andnanotechnology.Traditionalsensingtechniques,suchaspotentiometersandLVDTs,havelimitationsintermsofsize,accuracy,andreliability.FiberBragggrating(FBG)sensorshaveemergedasapromisingalternativeduetotheirnumerousadvantages,includingsmallsize,non-intrusiveness,andimmunitytoelectromagneticinterference.
2.PrincipleofOperation
TheproposedmicrodisplacementsensorconsistsofaFBGattachedtoanamplifiedsubstrate.TheFBGactsasastrainsensor,whiletheamplifiedsubstrateenhancesthesensitivityofthesystem.Whenadisplacementisapplied,theFBGexperiencesstrain,leadingtoashiftinitsBraggwavelength.Thisshiftisdetectedusinganopticalinterrogationsystem,enablingthemeasurementoftheapplieddisplacement.
3.DesignandFabrication
ThedesignofthesensorinvolvescarefulselectionofmaterialsforboththeFBGandtheamplifiedsubstrate.TheFBGisfabricatedbyexposingasectionofopticalfibertoperiodicultravioletlight,creatingagratingstructurethatreflectsaspecificwavelength.Theamplifiedsubstrateisdesignedbasedontheprinciplesofmechanicalamplification,enablingtheenhancementofthestrainexperiencedbytheFBG.ThefabricationprocessinvolvesprecisionmachiningandbondingtechniquestoensureproperalignmentandsecureattachmentoftheFBGandtheamplifiedsubstrate.
4.ExperimentalResults
Theperformanceofthesensorisevaluatedthroughvarious