本論文主要目的為研製與製作一套全自動的微控制處理器智慧聯網光纖干涉儀之入侵感測系統。此系統可分為四大部分，分別為以FBG構成四防區光纖干涉儀之光路、微處理器自動校正訊號基準點、微處理器分析訊號及聯網發送警報、手機使用者端接收警報訊號。此系統總共有四個防區，每個防區皆有一對相同波長的FBG，四個防區由一條單模光纖和四對FBG串接在一起，四個防區各自運作，並不會互相影響。微處理器可即時偵測四個防區的干涉訊號變化，並透過程式中的演算法計算出各防區的visibility，level crossing和frequency ratio且自動設定出各防區三種參數的閥值，並且當外部環境產生變化，導致接收訊號的強度不如預期時，微處理器會控制訊號接收器來調整接收強度，使得訊號有一個基準點，好讓程式維持在一個穩定的判別狀態。當有人為入侵其中任一個防區時，三種訊號參數便會超過系統中所自動設定的防區閥值，並透過兩種方法使監控人知道，第一就是透過主機盒上的顯示裝置，第二則是透過互聯網傳送警報訊息到監控者手機端。

The main objective of this thesis is to develop a highly stable and independent Michelson interferometer perimeter intrusion detection system. This system is divided into four parts. The first part is the fiber Bragg grating of four Michelson interferometers composed of fiber Bragg gratings. The second part involves using an optical receiver to convert the optical signal into an electrical signal and employing a digital potentiometer to adjust the voltage reference value. The third part utilizes a micro-control processor to analyze the signal from the optical receiver and send out an alert. The fourth part involves the user’s cell phone receiving the signal. This perimeter system uses single-mode optical fiber cables to connect four different wavelength regions in series, with each region's fence equipped with an optical cable. The four perimeter zones use different wavelengths, allowing the system to operate independently and without interference. The digital potentiometer can compensate for temperature variations, allowing the system to operate stably under different environmental conditions. The microprocessor can detect real-time changes in disturbance signals across four zones, and through algorithms in the program, calculate three signal parameters for each zone, automatically setting the threshold for each zone. When someone intrudes into one of the zones, the three signal parameters will exceed the pre-set threshold for that zone in the system. Automatically, the system will then send an alert message to the homeowner's phone via the network.

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