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題名 | Interfermetric Fiber Sensors Based on Triangular Phase Modulation=三角波相位調制技術應用於干涉式光纖感測器 |
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作者 | 李清庭; 張立武; 簡碧堯; Lee, Ching-ting; Chang, Lih-wuu; Chien, Pie-yau; |
期刊 | 中國工程學刊 |
出版日期 | 19980500 |
卷期 | 21:3 1998.05[民87.05] |
頁次 | 頁305-315 |
分類號 | 471.3 |
語文 | eng |
關鍵詞 | 超光二極體; 光纖陀螺儀; 相位鎖入迴路; 積光相位調制器; Superluminescent diode; Fiber optic gyroscope; Phaselocked loop; E-O phase modulator; |
中文摘要 | 本文針對光學干涉式感測器中相位差的測量,提出三種新穎的信號處理檢 測技術。在本系統裡,使用三角波信號來調制光相位及作為光相位差的量測。 在文章裡第一種技術係針對干涉儀的輸出信號作分割,並經過一低通濾波器以 取得光相位差。其次是測量分割信號間的時間差以量得光相位差,最後是使用 超外差的方法測量輸出信號間的相位差以得到光相位差。在整個實驗過程中, 使用較少受外界環境影響的光纖Sagnac干涉式感測器進行實驗的量測。由實 驗的結果,證實本系統的信號處理技術可得到很高的靈敏度和良好的線性度。 |
英文摘要 | This work presents three novel signal processing methods capable of accurately detecting the optical phase delay in optical interferometric sensors. In the proposed methods, a triangular waveform modulation signal is used to modulate the optical phase of an optical interferometer for measuring optical phase delay. The optical phase delay in the first method is obtained by integrating the interferometric output signals with the gated-in signal. The optical phase delay in the second method can be measured from the time delay difference between the interferometric signals during the gated-in period. for the third method, the pseudo-heterodyne technique is appled, and the optical phase delay is measured from the phase difference between two output signals. Moreover, a fiber Sagnac interferometric rotation sensor is adopted to demonstrate the effectiveness of the proposed methods Furthermore, experimental results confirm that the proposed methods have an extreme degree of sensitivity and good linearity. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。