- 學位論文
基於半導體雷射技術遠程風速儀之研究
The Study of Remote Anemometer Based on Semiconductor Laser Technology
摘要
近年來，對環境的監控越來越被重視，隨著科技的蓬勃發展，人們面對自然的挑戰逐漸能以預防來減輕傷害，這些災害中，風災對於我們海島國家的影響甚大，如果能提前預知氣候，便能進行更完善的防護措施。通常，風速及風壓的感測器設置場所位於山上或是臨海地區，儘管所使用的電子式感測器有很好的效能，但還是需要一個就近的電源和一些連接線。是故供電問題提升了架設的難度與複雜性，也導致成本居高不下。因此光纖式的感測器成為其中一種研究的方向。 在本論文中，我們提出無需近端供電之低成本設計，並結合光纖遠程風速監控之架構。利用小型發電機，將感測數據轉換成雷射的驅動來源，使之經過長距離光纖路徑回傳至接收端，記錄與分析得到之資訊。在實驗中其風速可量測範圍大約在5~15m/s，此方法經對照組之風速儀數據交叉比對可驗證其數據之正確性。
並列摘要
In recent years, environmental monitoring becomes more and more important. With the rapid development of technology, people can reduce the influence and damage from nature. If we can predict the weather in advance, then the protective measures will be better. Typically, wind speed and pressure monitor site is located on mountains or in coastal areas. Although the use of electronic sensors has a good performance but still need a nearby power supply and some cables, which cause the installation difficulty and complexity, but also lead to high costs. Therefore, the direction of the optical fiber sensors becomes one of the studies. In this thesis, we propose a low-cost remote anemometer design, which uses a small generator to simultaneously offer the detected data and the bias to drive a semiconductor laser and lets the optical signal through the long optical fiber back to the receiving end analyzing the obtained data. In the experiment, the proposed system can measure the wind speed range of 5 ~ 15 m/s and have the remote monitoring distance over 10 km. This method has been anemometer data group of cross-reference to verify the correctness of its data.