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研究生: 徐裕雄
yu-hsiung hsu
論文名稱: 複合材料法溫度補償光纖光柵壓力感測器之研究
Bi-Material Thermal compensation for a Fiber Bragg Grating Pressure Sensor
指導教授: 王立康
Li-Karn Wang
口試委員:
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 光電工程研究所
Institute of Photonics Technologies
論文出版年: 2005
畢業學年度: 93
語文別: 中文
論文頁數: 90
中文關鍵詞: 複合材料光纖光柵壓力感測溫度補償布拉格光纖光柵熱漲冷縮槓桿熱膨脹
外文關鍵詞: Bi-Material, Thermal compensation, Fiber Bragg Grating, Pressure Sensor
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  • 本論文提出一種利用複合材料的熱膨脹特性來實現溫度補償的布拉格光纖光柵壓力感測器架構,我們在實驗中利用槓桿以及彈簧的運作成功的將外界施加在系統上的壓力轉換成為在光纖光柵上的軸向應力,並且發展成可以隨環境需要而調整感測靈敏度的感測器架構。
    在壓力感測的方面,我們不但得到壓力與布拉格反射波長間線性的量測結果。經由理論推導我們感測器的壓力感測靈敏度更可以達到 的程度。相較於其他已知文獻所提出的利用光纖光柵作為壓力感測器元件的研究而言,我們的研究具有不錯的量測靈敏度以及可靠度,在做為實際應用上的考量來看絕對具有潛力。
    在消除溫度效應的方面,我們首先提出使用單一根布拉格光纖光柵來完成溫度補償的效果。利用到架構本身材料熱漲冷縮的特性,我們將這一個特性轉換用來消除光纖光柵因為溫度改變而伴隨之發生的溫度效應現象。經過我們的研究所得到的感測器不但不需要採用到複雜的調變以及解調變技術,布拉格光纖光柵本身也不需要經過任何的加工步驟,不但有效的減少了壓力量測系統在建購上面的成本付出,卻不用同時犧牲我們對消除溫度補償的要求標準。這對於本實驗架構在實用面向上的推展具有絕對的優勢。
    本論文所提出的壓力感測器架構組成簡單,不需要繁複的公式來推導該感測器的感測表現。我們改測器的架構也符合成本控制上的要求,不需要昂貴的儀器做為感測元件,我們的感測器架構不但可以做為他人將來研究利用光纖光柵做為壓力感測元件相關研究時的一個參考,更重要的,我們所提出之利用單一根光纖實現溫度補償的構想也是將來各個光纖溫度補償的相關研究可以列入參考的設計之一。


    第一章 緒論…………………………………………………………1 1.1 研究背景………………………………………………2 1.2 文獻回顧………………………………………………4 1.3 研究目的………………………………………………6 1.4 論文架構………………………………………………7 第二章 光纖光柵…………………………………………………8 2.1 光纖……………………………………………………8 2.2 光纖光柵的製作……………………………………16 2.3 Bragg光纖光柵的原理………………………………20 2.4 Bragg光纖光柵的物理特性…………………………24 2.5 Bragg光纖光柵的優點………………………………29 第三章 光纖光柵感測器及其在感測壓力上的應用………38 3.1 排除溫度效應的光纖光柵感測器…………………38 3.2 量測壓力的光纖光柵感測器………………………43 第四章 實驗架構及數據分析…………………………………55 4.1 傳感器(transducer) …………………………………55 4.2 壓力感測……………………………………………59 4.3 溫度補償實驗………………………………………64 4.4 造成誤差的因素……………………………………69 第五章 實驗結論與討論…………………………………………84 參考文獻………………………………………………………………86

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