在許多工業(yè)和科學(xué)系統(tǒng)中,位移或距離測(cè)量是定位測(cè)量的重要方面。對(duì)應(yīng)于參考點(diǎn)對(duì)象的位置變化稱(chēng)為位移。位移傳感器的發(fā)展對(duì)于位置測(cè)量系統(tǒng)和其他應(yīng)用(例如角度測(cè)量,應(yīng)變,壓力和許多其他應(yīng)用)具有很大的幫助。光纖位移傳感器是目前研究的前沿課題。目前存在多種基于不同技術(shù)和種類(lèi)的光纖傳感器,本文中我們采用聚合物光纖。本文報(bào)道了基于聚合物光纖的大范圍低成本位移傳感器技術(shù)。利用聚合物光纖的耦合和彎曲效應(yīng)原理設(shè)計(jì)了傳感器。光纖的彎曲損失效應(yīng)在傳感應(yīng)用中具有顯著的優(yōu)勢(shì)。我們提出了一種基于扭曲宏觀彎曲耦合現(xiàn)象的位移傳感器。宏觀彎曲損耗發(fā)生在光纖彎曲過(guò)程中,這一點(diǎn)在實(shí)驗(yàn)中得到了強(qiáng)調(diào)。為了演示POF中宏觀彎曲損耗的耦合,對(duì)兩根光纖進(jìn)行了扭曲和彎曲的線性位移測(cè)量。由于彎曲效應(yīng)在照明光纖中產(chǎn)生了損耗,在接收光纖中耦合的彎曲損耗則用于位移測(cè)量。在所提出的方法中,光纖的運(yùn)動(dòng)對(duì)應(yīng)于位移的變化,同時(shí)會(huì)對(duì)光纖的彎曲半徑產(chǎn)生影響。觀察傳感器的向前和向后移動(dòng)。在向前運(yùn)動(dòng)中,彎曲半徑變短,產(chǎn)生宏觀彎曲損失。而在回程過(guò)程中,光纖彎曲半徑增大。所設(shè)計(jì)的傳感器檢測(cè)范圍約為150mm,可用于靜態(tài)、動(dòng)態(tài)和平面進(jìn)-出的測(cè)量。該傳感器在0～80mm...

【文章頁(yè)數(shù)】：126 頁(yè)

【學(xué)位級(jí)別】：博士

【文章目錄】：
ABSTRACT
摘要
Chapter1 Introduction
    1.1 Applications of Displacement Sensor
        1.1.1 In Structural Health Monitoring
        1.1.2 In Petrochemical Industries
        1.1.3 Industrial Robots
        1.1.4 Hydraulic Cylinder System
        1.1.5 In Other System
    1.2 Sensing Methods For Displacement Sensor
        1.2.1 Conventional& Non-Conventional Sensing Methods
        1.2.2 Resistive Type Displacement Sensors
        1.2.3 Inductive Type Displacement Sensors
        1.2.4 Capacitive Type Displacement Sensors
        1.2.5 Ultrasonic Type Displacement Sensors
        1.2.6 Magnetic Type Displacement Sensors
    1.3 Optical Methods
        1.3.1 Optical Beam Deflection Sensing
        1.3.2 Optical Encoder Displacement Sensors
        1.3.3 Laser Interferometer Displacement Sensors
    1.4 Fiber Optical Sensors(FOS)
        1.4.1 Fiber Optics Displacement Sensor(FODS)
        1.4.2 Polymer Fiber Optics Displacement Sensor
        1.4.3 Distributed Fiber Optics Sensor(DFOS)
    1.5 Products Of Displacement Sensor
        1.5.1 The Principle of The Eddy Currents
        1.5.2 The Principle of Capacitive
        1.5.3 The Principle of Laser Triangulation
        1.5.4 Confocal Principle
Chapter2 The Twisted Macro-bend Coupling& Side-Coupling Phenomena
    2.1 Macro-bend Loss& Coupling
        2.1.1 Bent Loss
        2.1.2 Macro-bend Application
        2.1.3 Numerical Analysis Of Macro-bend
        2.1.4 Couple-Mode Theory
        2.1.5 Twisted Macro-bend Coupling
    2.2 Interference
        2.2.1 Interference Of Light Rays
        2.2.2 The Interferometer
        2.2.3 Constructive Interference Of Light Rays
    2.3 Conclusion
Chapter3 The Displacement& Angle Measurement
    3.1 Displacement Measurement
        3.1.1 Background
        3.1.2 Visualizations Of Coupled Scattered& Macro-bend Loss
        3.1.3 Sensors Design
        3.1.4 Experimental Work And Results
    3.2 Angle Measurement
        3.2.1 Background
        3.2.2 Angle Sensor Structure
        3.2.3 Experimental Setup
    3.3 Conclusion
Chapter4 Multi-Dimensional Displacement Sensing
    4.1 Two-Dimensional Sensing
        4.1.1 Background
        4.1.2 Cascading Of The Tmbc
        4.1.3 Two-Dimensional Sensing Structure
        4.1.4 2-D Displacement Sensor Experimental Setup
    4.2 Three-Dimensional Sensing
        4.2.1 Background
        4.2.2 Three Dimensional Sensor Structure
        4.2.3 Experimental Setup And Results
    4.3 The Plane-In-Out Displacement Measurement
    4.4 Multiple-Dimensional Displacement And Multiplexing Approach
    4.5 Conclusion
Chapter5 An Enlarge Displacement Sensor
    5.1 Background
        5.1.1 Intensity-Variation Based On The Side-Coupling
        5.1.2 Experimental Work& Results
    5.2 Conclusion
Chapter6 Conclusion
    6.1 Thesis Innovations
    6.2 Summary Of Work
    6.3 Future Work
References
Publications
Patents
Acknowledgement



本文編號(hào)：3801416