臺灣博碩士論文加值系統

在本文中提出使用光纖光柵感測器來量測音壓強度，光纖光柵感測器是將光纖光柵、磁石、及聚合物封裝於鋁質圓柱內。對於音壓強度的量測，利用麥克風輸出的電流訊號所產生的感應磁場去影響光纖光柵感測器，使光纖光柵的中心波長產生位移，然後利用光譜分析儀偵測光纖光柵的反射光訊號，即可得到波長的偏移量，進而得到偏移量與音壓的對比關係。此外，本文還使用長週期光纖光柵做為邊形濾波器與光纖光柵感測器做結合，利用此設置來量測音壓與瞬時之音頻，然後利用光譜分析儀偵測輸出端之光強度，進而得到光強度與音壓之對比關係。

The content this thesis is to achieve a fiber sensor based on the fiber Bragg grating, magnet and polymer encapsulated in an aluminum cylinder for the measurement of sound pressure level. The magnetic field created by the current signal of microphone output is used to act with the proposed fiber sensor. By using optical spectrum analyzer, the reflective wavelength shift and peak signal level can be obtained. The relationship curve between the grating center-wavelength and the sound pressure level is obtained. Besides, a long period fiber grating is used to be the function of an edge filter, and the fiber grating sensor is combined with it. This setup is used to measure the sound pressure level and the sound frequency simultaneously. Optical Spectrum Analyzer(OSA) is used to detect the power level from output, the relation between the power level and the sound pressure level is obtained.

摘要......................................................i
Abstract.................................................ii
目錄....................................................iii
圖目錄...................................................vi
表目錄.................................................viii
符號對照表...............................................ix
致謝......................................................x
第一章 緒論...............................................1
1.1 研究動機.....................................1
1.2 研究目的.....................................1
1.3 文獻研讀.....................................2
1.4 本文架構.....................................3
第二章 聲音的介紹.........................................4
2.1 聲音簡介.....................................4
2.1.1 聲音三要素................................5
2.2 聲音的單位...................................6
2.2.1 音壓位準..................................7
2.3 噪音簡介.....................................8
2.3.1 噪音對人的影響...........................10
2.3.2 噪音量測法規.............................11
第三章 光纖暨光纖光柵的基本介紹..........................12
3.1 光纖基本介紹................................12
3.1.1 光纖結構.................................12
3.1.2 傳遞原理.................................12
3.1.3 傳遞損失.................................13
3.2 常見的光纖參數與特性........................14
3.2.1 數值孔徑.................................14
3.2.2 光纖V參數................................14
3.3 光纖光柵基本介紹............................15
3.3.1 光纖光柵種類.............................15
3.4 長週期光纖光柵..............................18
3.4.1 模態耦合理論.............................19
3.5 布拉格光纖光柵..............................20
3.5.1 模態耦合理論.............................21
3.5.2 布拉格光纖光柵的優點.....................22
第四章 光纖光柵感測器理論................................24
4.1 布拉格光纖光柵應力效應及溫度效應............24
4.2 光纖光柵感測器工作理論......................25
4.3 光纖光柵感測器製作及結構....................27
第五章 光纖光柵感測器在音壓量測之應用....................29
5.1 實驗量測裝置與方法..........................29
5.2 實驗結果....................................32
5.3 光纖光柵感測器結合邊形濾波器................36
第六章 結論與未來研究方向................................45
6.1 結論........................................45
6.2 未來研究方向................................45
參考文獻.................................................46
作者簡介.................................................50

[1]A. D. Kersey et al., “Fiber Grating Sensors,” Journal of Lightwave Technology, Vol. 15, No. 8, pp.1442-1463, 1997.
[2]陳敏賢，「光纖感測器應用於電流量測」，逢甲大學電機工程所碩士論文，2006年。
[3]胡少康，「光纖光柵水位計」，逢甲大學電機工程所碩士論文，2006年。
[4]申浩然，「以光纖光柵為骨幹之壓力感測器研究」，國防大學中正理工學院電子工程研究所碩士論文，2002年。
[5]H. J. Sheng, M. Y. Fu, T. C. Chen, W. F. Liu, and S. S. Bor, “A Lateral Pressure Sensor Using a Fiber Bragg Grating,” IEEE Photonics Technology Letters, Vol. 16, pp. 1146-1148, 2004.
[6]X. Chen and B. Li, “Acoustic emission method for tool condition monitoring based on wavelet analysis,” Springer-Verlag London Limited, 2005.
[7]P. Perez-Millan, Ll. Martinez-Leon, A. Díez, J. L. Cruz and M. V.Andres, “A Fiber-Optic Current Sensor With Frequency-Codified Output for High-Voltage Systems,” IEEE Photonics Technology Letters, Vol. 14, pp.1339-1341, 2002.
[8]M. Feldmann and S. Buttgenbach, “Microoptical Distance Sensor with Integrated Microoptics applied to an Optical Microphone,” Sensors, pp. 3, 2005.
[9]T. Iida, K. Nakamura and S. Ueha, “A Microphone Array Using Fiber Bragg Grating,” Optical Fiber Sensor Conference Technical Digest, pp. 239-242, 2002.
[10]J. Sola-Soler, R. Jane, JA. Fiz and J. Morera, “Snoring Sound Intensity Study with Ambient and Traqueal Microphone,” 23rd Annual EMBS International Conference, pp. 25-28, 2001.
[11]L. Guangpu and P. Hongxia, “Measurement and Analysis of Noise Characteristics for Diesel Engine,” International IEEE Conference, pp. 181-184, 2006.
[12]T. Y. Kim, K.S. Suh, J. H. Nam and T. Takada, “Acoustic monitoring of HV equipment with optical fiber sensors,” IEEE Dielectrics and Electrical Insulation Society, Vol. 10, pp. 266-270, 2003.
[13]S. Kagami, H. Mizoguchi, Y. Tamai and T. Kanade, “Microphone Array for 2D Sound Localization and Capture,” Robotics and Automation IEEE Conference, Vol. 1, pp. 703-708, 2004.
[14]C. Ambrosino, P. Capoluongo, S. Campopiano, A. Cutolo, M. Giordano, D. Davino, C. Visone and A. Cusano, “Fiber Bragg Grating and Magnetic Shape Memory Alloy:Novel High-Sensitivity Magnetic Sensors,” IEEE Sensors Journal, Vol. 7, pp. 228-229, 2006.
[15]C. H. Cheng, M. H. Chen, and W. F. Liu, “Measurement of AC current using an optical fiber sensor,” International Symposium on Advanced Magnetic Material, pp. 310, 2007.
[16]Y. Yao and B. Yi, “FBG Based Voltage Measurement using PZT Modulation,” Wireless Communication, Networking and Mobile Computing, pp. 1-4, 2006.
[17]J. Yan, A. P. Zhang, L. Y. Shao, J. F. Ding and S. He, “Simultaneous Measurement of Refractive Index and Temperature by Using Dual Long-Period Gratings With an Etching Process,” IEEE Sensors Journal, Vol. 7, pp. 1360-1361, 2007.
[18]胡俊源，「實用工商業噪音控制」，南台圖書公司，1981年。
[19]環保署網站，http://www.epa.gov.tw/，2006年。
[20]張安華，「光纖通訊與實習」，新文京開發，2005年。
[21]T. Erdogan, “Fiber Grating Spectra,” Journal of Lightwave Technology, Vol. 15, No.8, 1277-1294, 1997.
[22]M. Harumoto, M. Shigehara and H. Suganuma, “Gain-Flattening Filter Using Long-Period Fiber Gratings,” Journal of Lightwave Technology, Vol. 20, No. 6, 1027-1033, 2002.
[23]K. O. Hill and G. Meltz, “Fiber Bragg grating technology fundamentals and overview,” Journal of Lightwave Technology, Vol. 15, No. 8, pp. 1263-1276, 1997.
[24]C. R. Giles, “Lightwave Applications of Fiber Gratings,” Journal of Lightwave Technology, vol. 15, pp. 1391-1404, 1997.
[25]R. M. cazo et al., “Fiber Bragg Grating Temperature sensor,” Optics (Optic Guides and Staple Fibers), 1999.
[26]V. Bhatia et al., “Long-period Fiber Grating Sensor,” Optical Fiber Communication Conference, pp. 265-266, 1996.
[27]王峻富，「小波轉換於馬達噪音訊號分析與壓縮之應用」，逢甲大學電機工程所碩士論文，2005年。
[28]李川、張以謨、趙永貴、李立京，「光纖光柵:原理、技術與傳感應用」，北京科學出版社，2005年。