基于椭圆光纤的扭转传感器——毕业论文

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1、基于椭圆光纤的扭转传感器摘要基于椭圆光纤的扭转传感器是一种高灵敏度的光纤扭转传感器。扭转效应已经被理论和实验证明。由于光弹影响，共振波长随扭转的增加而线性变化，波长的偏移取决于扭转方向。理论研究和实验可以证明通过优化核心和包层的折射率差异、纤芯和包层直径的椭圆度来增加扭曲灵敏度。近几年，光纤通信技术和光纤传感技术有良好的前景，通过光纤材料制成的器件已经覆盖到各个领域。这类器件一般情况下制作的费用较低，体积小，抗损坏性能好，灵敏度不受外界环境的影响等优良特性。本文设计了一种基于椭圆光纤的扭转传感器，有小型化，高灵敏度，和低温度敏感等特点。介绍了光纤传感器的发展现状，并从基本原理入手通过实验测

2、试等多个方面验证了这种传感器的优势和应用领域。从光的传播模式进行研究，进一步验证了椭圆光纤制成的扭转传感器是可行的。关键词：扭转传感器椭圆光纤扭曲灵敏度椭圆度TorsionalSensorBasedonEllipticFiberABSTRACTTorsionalSensorbasedonEllipticFiberhasahighsensitivity.Reverseeffecthasbeendemonstratedbytheoryandexperiment.Becauseofthephotoelasticeffects,resonancewavelengthchangelinearlywi

3、ththeincreaseoftorsional,theshiftofwavelengthdependsonthereversedirection.TheoreticalandexperimentalresearchcanbeprovedthatthesensitivitycanbeincreasedbyoptimizingtherefractiveindexdifferencebetweencoreandcladdingandincreasingOvalityofthecoreandthecladdingdiameter.Inrecentyears,opticalfibercommuni

4、cationsandopticalfibersensingtechnologyhavebeenvigorousdeveloped,thedevicesmadebyopticalfiberhavecoveredallthefields.Suchdeviceshaveadvantages,suchaslowproductioncosts,smallsize,non-destructive,sensitivitydoesn’teffectedbytheexternalenvironment.ATorsionalSensorbasedonEllipticFiberhasbeenpresentedi

5、nthispaper.Ithasmanyadvantages,suchassmallsize,highsensitivity,lowsensitivitywithtemperature.Thedevelopmentoffiberopticsensorshasbeenintroduced,advantagesandapplicationsofthissensorhavebeenprovedbytheoreticalanalysisandexperimentalverification.ResearchingfromthetransmissionmodelighttoprovethatTors

6、ionalSensorbasedonEllipticFiberisfeasible.KeyWords:TorsionalSensorEllipticFiberTwistedSensitiveOvality目录第一章绪论.................................................................11.1光纤传感及光纤光栅.......................................................11.2传感器的概述..............................................

7、...............21.3扭转传感器的概述.........................................................51.4光纤扭转传感器的应用状况.................................................71.4.1新型双向可调光纤扭转传感器............................................