光纖光柵壓力傳感器

TheresearchofFBGpressuresensingonthe

applicationofengineeringABSTRACTFibergratingisoneofthemostrapidpassiveopticalfibercomponentsinrecentyears.Since1978,theyearwhenK.O.Hillandothersfirstusedthestandingwavewritingwayinthegermanium-dopedfiberandmaketheworld'sfirstfibergrating,becauseofits'manyuniqueadvantages,theuseofthefibergratinginopticalfibercommunicationsFieldsandfiberopticsensorFieldsarebroadprospected.Withfibergratingmanufacturingtechnologycontinuestoimprove,andtheoutcomeoftheapplicationincreasing,thefibergratinghasbeenoneofthemostpromisingandrepresentativeopticalpassivecomponents.Theemergenceoffibergratingmakesmanyofthecomplexall-fibercommunicationsandsensornetworkspossible,whichgreatlywidenedthescopeofapplicationofopticalfibertechnology.Assensorcomponent,fibergratingalsopossessesotherspecialfunctions.Forexample,highabilityofresistingelectromagnetismdisturb,smallsizeandweight,hightemperature-proof,highabilityofmultiplex,beingliabletoconnectwithfiber,lowloss,goodspectrumcharacteristic,erosion-proof,highsensitivity,beingliabletodeformandsoon.Atpresent,thesensorthatadoptsFBG(fiberBragggrating)assensorcomponentshasbecomethemainstreamofdevelopmentandcultivation.PressureisthedirectcauseofthedriftingoftheBraggwavelengthofthegrating,soresearchontheFBGpressuresensingcharacterin-depthisimportanttotheFBGsensingtechnology.ThedesignisonthebasisofunderstandingofFBGsensingelements;exploretheusingofFBGpressurecharacter,soresearchontheFBGpressuresensingcharacterin-depthisimportanttotheFBGsensingtechnology.Bringforwardapackageprojectthatcanbeusedandthetext.1.Generallyintroducingthehistoryofthedevelopmentoftheopticalfibergrating,theclassificationandthewritingtechnologyoftheFBG.AndthedevelopmentandapplicationoftechnologyoftheFBGsensingtechnology.2.AnalyzingtheprincipaltheoryofFBGsensing,andcomprehensivelyanalyzingthemultiplexingtechniquesoffibergratingssuchasWDM、TDM、SDMetc.3．Studyingthepressuresensingcharacterofthebaregratingandself-producedfibergratingpressuresensor.Expoundingthetheoryandstructureofpackaginganddoingtherelatedexperiment,wealsoanalyzingthedataanddrawingtherelevantconclusionontheexperiment.Inaddition,theapplicationofbirefringenceovercomesthecross-sensitizationoftemperatureandpressure.Keywords:OpticalFiberGrating,OpticalFiberBraggGrating,Sensing,SensingCharacter,PressureSensing,PressureSensingCharacter光纖光柵壓力傳感器工程化研究摘要光纖光柵是最近幾年發(fā)展最為迅速的光纖無源器件之一。自從1978年K.O.Hill等人首先在摻鍺光纖中采用駐波寫入法制成世界上第一只光纖光柵以來，由于它具有許多獨特的優(yōu)點，因而在光纖通信、光纖傳感等領(lǐng)域均有廣闊的應(yīng)用前景。隨著光纖光柵制造技術(shù)的不斷完善，應(yīng)用成果的日益增多，使得光纖光柵成為目前最有發(fā)展前途，最具代表性的光纖無源器件之一。由于光纖光柵的出現(xiàn)，使許多復(fù)雜全光纖通信和傳感網(wǎng)成為可能，極大拓寬了光纖技術(shù)的應(yīng)用范圍。光纖光柵作為傳感元件還具有一些獨特的性質(zhì)，例如：抗電磁干擾能力強、尺寸小、重量輕、耐溫性好、復(fù)用能力強、易與光纖連接、低損耗、光譜特性好、耐腐蝕、高靈敏度、易形變等等。目前，已報道的光纖光柵傳感器可以檢測的物理量有：溫度、應(yīng)變、壓力、位移、壓強、扭角、扭矩(扭應(yīng)力)、加速度、電流、電壓、磁場、頻率、濃度、熱膨脹系數(shù)、振動等，其中一部分光纖光柵傳感系統(tǒng)已經(jīng)實際應(yīng)用。而以布拉格光纖光柵(FBG:fiberBragggrating)為傳感元件的傳感器已成為研發(fā)主流。壓力則是光柵布拉格波長發(fā)生漂移的直接原因之一，研究光纖光柵的壓力傳感特性對深入研究光纖光柵傳感技術(shù)有重要意義。本設(shè)計在深入理解光纖光柵傳感機理的基礎(chǔ)上，探索利用光纖光柵進行壓力傳感的工程化封裝技術(shù)，提出一種工程上可實際利用的封裝方案并進行實驗。主要包括以下內(nèi)容：1、概述了光纖及光纖光柵發(fā)展的歷史，介紹了光纖光柵的分類與光纖光柵傳感技術(shù)的發(fā)展與應(yīng)用。2、分析了光纖