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(wú)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(xiě)入法制成世界上第一只光纖光柵以來(lái)，由于它具有許多獨(dú)特的優(yōu)點(diǎn)，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(wú)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(dú)特的性質(zhì)，例如：抗電磁干擾能力強(qiáng)、尺寸小、重量輕、耐溫性好、復(fù)用能力強(qiáng)、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(bào)道的光纖光柵傳感器可以檢測(cè)的物理量有：溫度、應(yīng)變、壓力、位移、壓強(qiáng)、扭角、扭矩(扭應(yīng)力)、加速度、電流、電壓、磁場(chǎng)、頻率、濃度、熱膨脹系數(shù)、振動(dòng)等，其中一部分光纖光柵傳感系統(tǒng)已經(jīng)實(shí)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(zhǎng)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(duì)深入研究光纖光柵傳感技術(shù)有重要意義。本設(shè)計(jì)在深入理解光纖光柵傳感機(jī)理的基礎(chǔ)上，探索利用光纖光柵進(jìn)行壓力傳感的工程化封裝技術(shù)，提出一種工程上可實(shí)際利用的封裝方案并進(jìn)行實(shí)驗(yàn)。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