2009-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/710878摘要：光纖光柵所製成的感測器具有多點同時量測的能力，而目前以光譜儀分析的解調方式只能做到靜態量測，因此對於快速變化動態反應的量測須設計不同的解調方式。本研計劃為三年期計劃，旨在建立光纖光柵在動態及暫態的量測系統，並以此感測系統應用於結構抑振問題的探討，最後以即時多點的量測能力應用於塊材波傳三維暫態位移的同步量測。在本計畫中將使用雷射都卜勒振動儀與光纖光柵感測系統的量測結果作即時比較以確定研究成果的可行性與正確性。 第一年的研究計畫將建立一套高靈敏度之光纖光柵位移感測器與相應之解調系統，研究其於低、中及高頻之動態位移訊號量測能力，並設計能量測面內運動之光纖光柵位移感測器。第二年的研究計劃則將以結構抑振問題的探討來驗証所建立之光纖光柵感測系統之暫態量測能力以及提升抑拫控制之相關研究。而在第三年的研究計畫中將以鋼珠撞擊塊材之暫態波傳實驗來研究本系統在三維多點之同步量測能力。 綜上所述，本三年研究計畫旨在建立高靈敏度之光纖光柵多點之動態及時量測系統，而這一方面的研究亦是目前國內外有關光纖光柵研究上有所不足之處，本研究計畫雖有其困難性，而主持人在材料動態特性的研究上已有相當良好的基礎，應可順利完成本研究計畫。 <br> Abstract: Grating-based fiber sensors are capable of simultaneously detecting responses of multi-point. Nowadays, the available fiber sensor demodulating system is based on optical spectrum analyzer in which only static response can be measured. To achieve the multi-point dynamic response measuring ability, different demodulation method must be provided. The main objective of this three years-project is to establish a fiber-based multi-point dynamic and transient detection system. Laser Doppler vibrometer will be used in this project to verify the results obtained from grating-based fiber. The first year will be focused on improving the sensitivity and SNR of the fiber sensor dynamic demodulation system. Vibration suppression experiments will be performed to test the transient detection ability of the fiber sensor system in the second year. We will use the multi-point detection ability of the demodulation system to measure the three-dimensional transient displacement response of wave propagation in three orthogonal directions in the third year.光纖光柵結構抑振三維動態反應Grating-based fiberVibration suppressionThree dimensionDynamic response