2011-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/714042摘要：光纖光柵感測系統具有多點同時量測的能力，而目前的研究多侷限於靜態或低頻穩態的應變量測。本研究計劃為三年期計劃，旨在建立光纖光柵在動態及暫態微奈米精度的位移及應變量測系統，並以此感測系統應用於結構抑振與壓電材料精密定位問題的研究，最後以其即時多點的量測能力應用於塊材波傳三維暫態位移及應變的同步量測。在本計畫中將使用雷射都卜勒振動儀及應變規與光纖光柵感測系統的位移及應變量測結果作即時比較以確定研究成果的可行性與正確性。一般而言，一種量測系統僅能量測一個物理量，而期望經由本研究計畫所探討的光纖光柵感測器結合量測系統的開發，可同時應用於量測動態位移與動態應變兩種重要的物理量。 第一年的研究計畫將建立一套高靈敏度之光纖光柵位移及應變感測器與訊號解調系統，開發布拉格光纖光柵濾波器以及傾斜式光纖光柵濾波器增加量測精度，並研究光纖光柵的動態位移及應變量測能力。第二年的研究計劃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位移及應變之同步量測能力。而在第三年的研究計畫則將以結構抑振與壓電材料精密定位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振控制及精密定位之相關應用研究。 <br> Abstract: Grating-based fiber sensors are capable of simultaneously detecting responses of multi-point; however, most researches are focusing on static sensing system for the measurement of strain. The main objective of this three years-project is to establish a fiber-based multi-point dynamic and transient displacement and strain measurements and use these sensors in the vibration control and precision control systems. Laser Doppler vibrometer and strain gage will be used in this project to verify the results obtained from grating-based fiber displacement and strain sensor, respectively. The first year will be focused on improving the dynamic displacement and strain measurement ability of the fiber sensor demodulation system. The FBG and TFBG filters will be developed to increase the sensitivity of the measurement. 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 second year. Vibration suppression experiments and precision control will be performed to test the transient detection ability of the fiber sensor system in the third year.光纖光柵微奈米精度結構抑振動態位移量測動態應變量測Grating-based fiberMicro-Nano SensitivityVibration suppressiondynamic displacement measurementdynamic strain measurement