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研究生:賴珏年
研究生(外文):Chueh-NienLai
論文名稱:適用於土石流地聲量測之光纖光柵感測器之發展與應用
論文名稱(外文):Development and Application of Fiber Bragg Grating Sensors for Detecting Ground Vibrations Generated by Debris Flows
指導教授:黃清哲黃清哲引用關係
指導教授(外文):Ching-Jer Huang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:水利及海洋工程學系碩博士班
學門:工程學門
學類:河海工程學類
論文種類:學術論文
論文出版年:2010
畢業學年度:98
語文別:中文
論文頁數:126
中文關鍵詞:光纖光柵感測器桑克與馬赫-詹德干涉儀地聲土石流
外文關鍵詞:FBGSagnac and Mach-Zehnder hybrid interferometerground vibrationdebris flow
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本研究主要為利用桑克(Sagnac)與馬赫-詹德(Mach-Zehnder)混合式干涉儀發展布拉格光纖光柵感測器(Fiber Bragg Grating Sensor),用於土石流地聲之監測,感測器為參考前人發表應用光纖光柵感測器量測加速度之文獻,加以改良設計而成,其構型分別為三明治型光纖光柵感測器、雙樑型光纖光柵感測器以及懸臂樑型光纖光柵感測器。試驗方法為利用干涉光路系統搭配感測器於實驗室進行石頭撞擊礫石底床之測試,並與目前用來量測土石流地聲之地聲檢知器(Geophone)做比較。待實驗室測試分析結果證實可行後,擇ㄧ現地土石流觀測站進行現地試驗,本研究之現地測試位於南投縣神木土石流觀測站愛玉子溪之河床。由於現地組成粒子較為複雜,因此所測得地聲頻域較廣,由試驗結果可知光纖光柵感測器有效量測地聲訊號,並比對三種構型感測器與地聲檢知器結果,顯示三明治型光纖光柵感測器感測性能最好。最後,實驗結果顯示光纖光柵感測器與地聲檢知器的量測結果具有高度的一致性,足見光纖光柵感測器可應用在土石流地聲監測上。
The purpose of this study is to develop fiber bragg grating sensors based on the Sagnac and Mach-Zehnder hybrid interferometer for detecting ground vibrations generated by debris flows. The development of advanced FBG sensors, including Sandwich FBG sensor, flexural beam FBG sensor, and cantilever beam FBG sensor, refer to the previous construction made for acceleration measurement in literature. The FBG sensors and the fiber optical system were examined with geophone in the laboratory to measure the ground vibration produced by rocks hitting ground. Comparison of measured signals verified the capability of the advanced sensors, and the consistency between FBG sensors and geophone in time and frequency domain. Field experiments were conducted near the main channel of river, where debris flows monitoring system would be deployed. The FBG sensors and the geophone were buried in the ground near Ai-Yu-Zi Creek to measure the ground vibration produced by the rocks striking. The analysis of data acquired by the FBG sensors and a geophone indicated that the frequency range of impact signal measured in field was wider than in the laboratory. Furthermore, measured result from the Sandwich FBG sensor was better than the other sensors. The result of measurement could be as reference for development of monitoring system and applied on detection of debris flow in the future.
摘要 I
Abstract II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
第一章、緒論
1-1 前言 1
1-2 土石流地聲之相關研究 2
1-3 光纖光柵感測器之相關研究及應用 5
1-4 研究內容 7
第二章、相關理論
2-1 地聲簡介 8
2-2 土石流之特性 8
2-3 光纖之構造與分類 11
2-4 光纖感測器之類型 16
2-5 光纖光柵感測原理 17
2-5.1 光纖光柵感測原理 17
2-5.2應變與波長飄移關係 18
2-5.3干涉原理 19
2-5.4干涉儀 20
2-5.5光纖加速度計之原理 23
2-6 分析方法原理 25
第三章、實驗內容及方法
3-1光纖光柵量測系統之架構 29
3-2 新型光纖光柵感測器 40
3-2.1 光纖光柵感測器之構型 40
3-2.2 感測器細部結構之比較 46
3-3光纖量測系統實驗佈置 47
3-3.1實驗水槽測試佈置 47
3-3.2現地實驗測試佈置 51
第四章、結果與討論
4-1 光纖光柵感測器實驗室測試結果 56
4-1.1 三明治型光纖光柵感測器分析結果 56
4-1.2 雙樑型光纖光柵感測器分析結果 66
4-1.3 懸臂樑型光纖光柵感測器分析結果 76
4-2 光纖光柵感測器現地測試結果 86
4-2.1 三明治型光纖光柵感測器現地分析結果 86
4-2.2 雙樑型光纖光柵感測器現地分析結果 96
4-2.3 懸臂樑型光纖光柵感測器現地分析結果 106
4-3 比較不同構型之光纖光柵感測器特性差異 116
第五章、結論與建議
5-1 結論 119
5-2 建議 120
參考文獻 121

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