本論文以麥克森干涉儀為感測基礎，設計一光纖式感測儀，可應用於邊界防禦系統，其中透過DWDM將不同防區的雷射分為多個特定波長，分別可以對應於數個防區系統，以利於增加防禦系統範圍，另外在此架構中，並不需要先行架構好龐大的多波長雷射系統再進入感測端，而是可以將分波長動作在個別防區架構中完成，本文中，我們先選擇了四個波長製作四個防區，其中三個波長相近，而另外一個波長相對於其於三個波長較遠，分別測試其在室內以及戶外的表現，另外除了單一防區感測表現外，也測試了其他防區對某防區的影響；配合電腦軟體界面，隨時監控各個防區是否有遭到入侵跡象，並且於室內以及戶外不同環境下分別決定判斷門檻值(Threshold)，再以不同入侵方式測試各防區之干涉效果以及是否會互相干擾，以達到最低誤報率之效果。

In this paper, we propose a perimeter intrusion detection system which uses Michelson interferometers. This system has four defense zone and each zone employs a specified wavelength to detect intrusion. The goal of this paper is trying to find the thresholds at different weathers and situations. We preset three thresholds to decide whether the disturbance is intrusion or not. When the disturbance occurs and the detected signal meets the conditions for intrusion, the proposed algorithm triggers an alarm. In other words, if we want to reduce false alarm rate effectively, we just need to preset the right thresholds at first.

第一章 序論.....1
1.1 研究背景.....1
1.2 研究動機.....1
1.3 文獻回顧.....3
1.3.1 光時域反射儀.....3
1.3.2 桑克干涉儀.....4
1.3.3 混合式干涉儀.....6
1.4 論文架構.....9

第二章 原理與介紹.....10
2.1 光纖(Optical Fiber).....10
2.2 光纖耦合器(Fiber Coupler).....11
2.3 摻鉺光纖放大器(Erbium-doped Fiber Amplifier, EDFA).....13
2.4 光纖接續.....16
2.5 麥克森干涉儀(Michelson Interferometer).....17
2.6 入侵判斷.....19
2.6.1 準位跨越門檻值(Level-Crossing Threshold).....19
2.6.2 電壓門檻值(Voltage Thershold).....19
2.6.3 頻率比例門檻值(Frequency Ratio Threshold).....20

第三章 實驗架構.....21
3.1 雷射光源與波長選定.....22
3.2 摻鉺光纖長度選用.....24
3.3 其餘實驗元件介紹.....26
3.3.1 光纖耦合器(Fiber Coupler).....26
3.3.2光纖環形反射鏡(Fiber Loop Mirror).....26
3.3.3密集分波多工器(Dense Wavelength Division Multiplexer, DWDM).....26
3.3.4鎧裝光纖光纜(Armor Fiber Cable).....27
3.3.5光偵測器(Power Detecter, PD).....27
3.3.6數據採集(Data Acquisition, DAQ).....27
3.3.7麥克森干涉儀(Michelson Interferometer).....28
3.3.8入侵方式.....28

第四章 實驗結果與分析.....30
4.1 雷射表現.....30
4.2 戶外測試.....32
4.2.1 晴天測試-門檻值選定.....32
4.2.2 小雨測試-門檻值選定(24小時達71毫米).....38
4.2.3 大雨測試-門檻選定(24小時達168毫米).....43
4.2.4 人工豪雨測試-門檻值選定(24小時超過800毫米，中央氣象局定義超大豪雨).....48
4.2.5 各種氣候下比較.....53
4.2.6 防區間互相干擾.....76
4.2.7 入侵結果.....82
4.3 室內測試.....89
4.3.1 門檻值設定.....89
4.3.2 入侵測試.....92

第五章 結論.....94
參考文獻.....95

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