臺灣博碩士論文加值系統

本論文提出利用光纖光柵與懸臂樑來完成兩種可量測任一角度之光纖光柵旋轉角度感測器。第一種為光纖光柵結合懸臂樑之旋轉角度感測器，此感測器是將兩根不同波長的布拉格光纖光柵均勻黏貼在一懸臂樑上，利用一特殊轉盤上的金屬圓柱體帶動懸臂樑彎曲，分別改變兩根光柵之軸向應變，使得光柵週期產生變化，進而造成光柵中心波長的漂移，以達到任意旋轉角度之量測，並討論有關懸臂樑之相關參數。第二種為靈敏度可調整之旋轉角度感測器，此感測器是將兩根不同波長的布拉格光纖光柵均勻黏貼在一懸臂樑上，利用一V型槽轉盤，將懸臂樑的自由端放置在V型槽內，利用槽內施予的正向力帶動懸臂樑彎曲，並且此V型轉盤可任意推進或是遠離懸臂樑的固定端。藉由此機制，可以任意改變懸臂樑的應變量，達到靈敏度可調整之目的。

In this thesis two different rotating angle sensing structures based on fiber Bragg gratings with characteristics of excellent linearity, fine measuring resolution, nice stability, negligible hysteresis phenomenon, and arbitrary random rotational angle detection are proposed. The first kind of sensor is composed of optical gratings and a cantilever. In which two fiber Bragg gratings(FBGs) with different wavelengths are uniformly glued on the cantilever. A metal cylinder is fixed on the rotor to make cantilever beam have an initial bending, and sinusoidal shifts of reflected wavelength peaks are induced by the variation of the rotor’s rotating angle. Rotation angle measurements are demonstrated, and the relative parameters of the cantilever are discussed. The second is tunable-sensitivity rotational-angle sensor. Two fiber Bragg gratings(FBGs) with different wave length are fixed uniformly on the cantilever. The free end of the cantilever is put in an V-shaped aperture on rotor. The rotor is free to move and adjustable axially, the strain of FBGs can be changed accordingly. By this mechanism, expected arbitrarily change of the strain and sensitivity of the cantilever can be obtained.

摘 要 i
Abstract ii
致 謝 iii
目 錄 iv
圖目錄 vii
表目錄 xii
第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 3
1.3 研究方法 5
第二章 光纖之光學特性 7
2.1 光纖基本介紹 7
2.2.1 光纖結構 7
2.2.2 導光原理 8
2.2.3 光纖種類 11
2.2 光纖光柵簡介 14
2.2.1 光纖光柵寫製方法 14
2.2.2 光纖光柵種類 18
2.3 光纖光柵理論分析 21
2.3.1 光纖光柵基本理論 21
2.3.2 布拉格光纖光柵 23
2.3.3 光纖光柵理論分析 24
2.3.4 布拉格光纖光柵感測特性 29
第三章 光纖光柵旋轉角度器設計與原理 33
3.1 前言 33
3.2光纖光柵結合懸臂樑之旋轉角度感測器之感測特性 33
3.2.1 前言 33
3.2.2 旋轉角度感測器之構造 34
3.2.3 旋轉角度器與懸臂樑之原理 36
3.3 靈敏度可調整之旋轉角度感測器之感測特性 41
3.3.1 前言 41
3.3.2 旋轉角度感測器之構造 41
3.3.3 旋轉角度器與懸臂樑之原理 42
第四章 實驗結果與分析 49
4.1 布拉格光纖光柵的寫製 49
4.2 光纖光柵結合懸臂樑之旋轉角度感測器之量測 51
4.2.1 實驗架構 51
4.2.2 量測方法 52
4.2.3 實驗結果 56
4.3 靈敏度可調整之旋轉角度感測器之量測 75
4.3.1 實驗架構 75
4.3.2 量測方法 76
4.3.3 實驗結果 80
第五章 結論與未來展望 85
參考文獻 87
作者簡介 89

[1] Chia-Min Lin, Yi-Chi Liu, Wen-Fung Liu, Ming-Yue Fu, Hao-Jan Sheng, Sheau-Shong Bor, and Chuen-Lin Tien ”High-Sensitivity Simultaneous Pressure and Temperature Sensor Using a Superstructure Fiber Grating,” IEEE SENSORS JOURNAL, VOL. 6, NO. 3, JUNE 2006
[2]L. Kruger, P. Swart, A. Chtcherbakov, and A. Wyk, "Non-contact torsion sensor using fibre Bragg gratings," Measurement Science & Technology, Vol. 15, pp. 1448-1452, 2004.
[3] Byoungho Lee,“ Review of the Present Status of Optical Fiber Sensors,” Optical Fiber Technology, Vol. 9, pp. 57-79, 2003.
[4]K. Schroeder, W. Ecke, J. Apitz, E. Lembke, and G. Lenschow, "A fibre Bragg grating sensor system monitors operational load in a wind turbine rotor blade," Measurement Science and Technology, Vol. 17, pp. 1167-1172, 2006.
[5]H. Kim, L. Kang, and J. Han, "Shape estimation with distributed fiber Bragg grating sensors for rotating structures" Smart Materials and Structures, Vol. 20, pp. 035011, 2011.
[6] YipingWang,WeiJin, D.N.Wang,“Unique temperature sensing characteristics of CO2-laser-notched long-period fiber gratings,” Optics and LasersinEngineering47(2009)1044–1048
[7] Kwang Taek Kim, Hyun Suk Song, Jae Pyung Mah, Ki Bum Hong, Kiegon Im, Se-Jong Baik, and Yang-Il Yoon, “Hydrogen Sensor Based on Palladium Coated Side-Polished Single-Mode Fiber”, IEEE SENSORS JOURNAL, VOL. 7, NO. 12, DECEMBER (2007) 1767-1771.
[8] R. Montanini and S. Pirrotta, "A temperature-compensated rotational position sensor based on fibre Bragg gratings," Sensors and Actuators a-Physical, Vol. 132, pp. 533-540, 2006.
[9]M. Nishiyama and K. Watanabe, "Rotational positioning measurement for the absolute angle based on a hetero-core fiber optics sensor," Proceedings of SPIE, Vol. 7503, pp. 750324-1-7503224-4, 2009.
[10]H. Yu, X. Yang, Z. Tong, Y. Cao, A. Zhang, "Temperature-Independent Rotational Angle Sensor Based on Fiber Bragg Grating," IEEE Sensors Journal, Vol. 11, pp. 1233-1235, 2011.
[11] G. Meltz, W. W. Morey, and W. H. Glenn,“ Formation of Bragg gratings in optical fibers by a transverse holographic method,” Opt. Lett., vol. 14, pp. 823–825, 1989.
[12] Ashish M. Vengsarkar, Paul J. Lemaire, Justin B. Judkins, Vikram Bhatia, Turan Erdogan, and John E. Sipe,“Long-Period Fiber Gratings as Band-Rejection Filter,” JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 14, NO. 1, JANUARY 1996.

[13] K. O. Hill and G. Meltz,” Fiber Bragg Grating Technology Fundamentals and Overview,” Journal of Lightwave Technology, Vol. 15, No. 8, pp. 1263-1276, August 1997. fiber gratings,” Journal of lightwave technology, Vol 20, No. 2, pp. 255-266, February 2002.
[14] T. Erdogan,“ Fiber grating spectra,”Journal of lightwave technology, Vol 15, No.8, pp.1277-1294, August 1997.