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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Temperature Sensing of Metal-Coated Fiber Bragg Grating
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Temperature Sensing of Metal-Coated Fiber Bragg Grating

机译：金属涂层光纤布拉格光栅的温度感测

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摘要

Optical fiber Bragg grating (FBG) sensors have attracted considerable interest due to their special wavelength-encoded nature, small size, lightness, and immunity to electric–magnetic interference. Before being embedded into metal structures, FBG sensors must be protected and metal coating is one of the most efficient protective methods. The fluctuation of temperature induces thermal stresses between metal coating and the optical fiber due to their different thermal expansion coefficients. The thermal stresses affect the temperature sensitivity of FBG sensors. This paper presents a new method for analyzing the effects of thermal stresses on the Ni–Cu coated FBG, Cu–Ni coated FBG, and one-layer metal-coated FBG. Specifically, copper was chosen as the conductive layer for deposition on FBG and different thickness of nickel coating was then deposited on the top of the copper as the protective coating by electroless plating and electroplating. The sample with different thickness of metal coating was thermally tested from 35 $^{circ}$C to 95  $^{circ}$C. The electroplating Ni–Cu coated FBG was embedded into #45 steel by the brazing method and tested from 35 $^{circ}$ C to 95 $^{circ}$C as well. The obtained data verified the soundness of the presented model.
机译：光纤布拉格光栅（FBG）传感器因其特殊的波长编码特性，小尺寸，轻巧和抗电磁干扰而引起了人们的极大兴趣。在将FBG传感器嵌入金属结构之前，必须对其进行保护，并且金属涂层是最有效的保护方法之一。由于金属热膨胀系数不同，温度的波动会在金属涂层和光纤之间引起热应力。热应力会影响FBG传感器的温度灵敏度。本文提出了一种新的方法来分析热应力对Ni-Cu涂层FBG，Cu-Ni涂层FBG和单层金属涂层FBG的影响。具体地，选择铜作为用于在FBG上沉积的导电层，然后通过化学镀和电镀将不同厚度的镍涂层沉积在铜的顶部作为保护涂层。对具有不同厚度的金属涂层的样品进行了热测试，测试温度为35 thermalC至95C。电镀镍铜涂层的FBG通过钎焊方法嵌入到＃45钢中，并在35 $ ^ {circ} $ C到95 $ ^ {circ} $ C范围内进行了测试。获得的数据验证了所提出模型的正确性。

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