臺灣博碩士論文加值系統

本研究提出使用光敏光纖及雷射加工製程來製作傾斜式布拉格光纖光柵 ( Tilted fiber Bragg gratings；TFBG ) 感測器。應用於碳纖維強化聚合物(CFRP)複合材料成化監測、應變及腐蝕感測，其中TFBG感測器的感測原理是光透過纖芯與纖殼模態之間的相互耦合來產生對應頻譜飄移，纖芯模態有量測應力及溫度變化的能力；纖殼模態具有量測外界折射率變化的能力。
第一部分提出以斜角布拉格光纖光柵(TFBG)埋入複合材料作為感測器，除了監測成化(curing)過程材料性質變化，找到材料開始凝膠化(gelation)溫度範圍，最後還能藉由光學頻譜結果分析材料所受殘留應力影響，實驗結果發現布拉格光纖光柵所量測到最大軸向殘留應力為-22.25 MPa，軸向殘留應變為-281.351  ; 最大側向殘留應力為-10.7MPa，側向殘留應變為-89.91 με。
第二部分提出以斜角布拉格光纖光柵(TFBG)埋入複合材料成化後製成具有感知功能的智慧型複合材料，四點彎曲應變感測實驗結果發現，三次循環的平均應變靈敏度為0.00015 nm/με，平均線性度為0.9985，證明我們所開發的智慧型複合材料具有應變的感知能力。
第三部分提出結合電鑄製程及塗覆氧化石墨烯的TFBG感測器，製作出具鎳金屬鍍層的斜角布拉格光纖光柵(MTFBG)腐蝕感測器，由Tafel電化學腐蝕感測實驗結果得到試片的腐蝕電流、腐蝕電位及極化電阻，可藉由獲得的實驗數據比較試片的腐蝕程度及腐蝕速率；MTFBG腐蝕感測實驗則發現，隨著試片開始腐蝕傳輸損耗有下降的現象。另在長時間監測異金屬焊道試片腐蝕實驗結果得知隨著浸泡時間越久腐蝕的情況越嚴重，MTFBG腐蝕感測器的纖殼模態逐漸變短，頻譜整體損耗逐漸降低。上述實驗結果證明本研究開發之MTFBG腐蝕感測系統可成功的應用於量測異金屬焊接艦體材料的腐蝕情況。

In this paper, we propose to use the hydrogen-carrying process to make tilted Bragg fiber gratings for magnetic field measurement and electric field measurement. The principle of the tilted Bragg fiber grating sensors (TFBG) is that light passes through the core. The mutual coupling with the fiber cladding mode produces the corresponding spectrum drift. The core mode can measure the change of stress and temperature; the fiber cladding mode can measure the change of the external refractive index, which in turn produces the spectrum drift.
The first part proposes a slanted fiber Bragg grating (TFBG) embedded CFRP　(Carbon Fiber Reinforced Polymer)　composite as a sensor. In addition to monitoring the changes in material properties during the curing process, the temperature range at which the material begins to gelation is found.　Finally, the effect of residual stress on materials can be analyzed by optical spectrum results.　The maximum value of residual stress and residual strain at the longitudinal direction are -22.25 MPa, and -281.351 , respectively. The maximum value of residual stress and residual strain at the transverse direction are -10.7 MPa and　-89.91με, respectively.
In the second part, we proposed to embed the tilted fiber Bragg grating (TFBG) into the CFRP composite to form a smart composite with sensing function. The four-point bending three cycles strain sensing experiment results show that the average strain sensitivity of is 0.00015 nm /με, the average linearity is 0.9985, which proves that the smart composite we developed can sense strain.
In third part, we proposed to combine the electroforming process and graphene oxide-coated TFBG sensor to fabricate a metal-coated tilted fiber Bragg grating (MTFBG) corrosion sensor.　The corrosion current, corrosion potential and polarization resistance of the test piece are obtained from the Tafel electrochemical corrosion sensing experimental results, and the corrosion degree and corrosion rate of the test piece can be compared by the obtained experimental data. The MTFBG corrosion sensing experiment found that the transmission loss of spectrum decreased as the test specimen began to corrode.　In addition, the long-term monitoring of the corrosion test results of the dissimilar metal bead test specimen shows that the longer the immersion time is, the more serious the corrosion is, the cladding mode of the MTFBG corrosion sensor is gradually shortened, and the overall loss of the spectrum is gradually reduced.　The above experimental results prove that the MTFBG corrosion sensing system developed in this study can be successfully applied to measure the corrosion of dissimilar metal welded hull materials.

致謝 1
ABSTRACT 3
目錄 5
圖目錄 7
表目錄 10
第一章 序論 11
1.1 研究動機 11
1.2 研究目的 13
1.3文獻回顧 14
1.3-1 複合材料 14
1.3-2布拉格光纖光柵之製作方法 18
1.3-3 斜角布拉格光纖光柵應用於複合材料 21
1.3-4 腐蝕破壞強度感測文獻回顧 22
第二章 基礎理論 28
2.1 傾斜布拉格光纖光柵基本原理 28
2.2 耦合模態理論 31
2.3 耦合模態理論分析 38
2.4 傾斜光纖光柵之共振波長位置 42
2.5 傾斜光纖光柵外界折射率靈敏度分析 43
第三章 研究方法與步驟 44
3.1 光纖製程－傾斜式布拉格光纖光柵製程 44
3.2 CFRP材料固化監測實驗架構 47
3.3 智慧型複合材料四點彎曲實驗架構 49
3.4 具金屬鍍層TFBG感測器製程 51
3.4.1 靜電噴塗氧化石墨烯 51
3.4.2 具金屬鍍層TFBG感測器的電鑄製程 52
3.5 異金屬焊道試片製作 53
3.5.1具防蝕處理異金屬焊道試片製作 54
3.6 具金屬鍍層斜角布拉格光纖光柵感測器腐蝕感測實驗架構 55
3.7 電化學Tafel實驗架構 56
3.7-1電化學Tafel實驗原理 56
3.7-2電化學Tafel實驗方法 56
第四章 實驗結果與討論 59
4.1埋入TFBG感測器監測CFRP成化實驗結果 59
4.1.1 TFBG感測器埋入CFRP之升溫成化結果 59
4.1.2 TFBG感測器埋入CFRP之降溫成形結果 60
4.1.3降溫成形後波長橫向劈裂變化 61
4.2. CFRP 材料的 DSC 分析 62
4.3 智慧型複合材料四點彎曲實驗 62
4.4具鎳金屬鍍層的斜角布拉格光纖光柵腐蝕感測實驗 66
4.4-1 MTFBG感測器異金屬焊道腐蝕實驗 66
4.4-2異金屬焊道試片電化學腐蝕監測及分析 67
4.4-3異金屬焊道試片MTFBG腐蝕監測及分析 69
第五章 結論 73
參考文獻 74

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