铠装光纤Bragg光栅温度传感器的研究  

Research of metal-clad fiber Bragg grating temperature sensor

作　　者：李川[1] 吴晟[1] 刘建平[1] 龙昊波[1] 朱黎军[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650051

出　　处：《传感器技术》2005年第4期29-30,33,共3页Journal of Transducer Technology

基　　金：云南省学术与技术带头人后备人才基金资助项目(2003RC12);云南省自然科学基金资助项目(2002F0004R)

摘　　要：裸光纤Bragg光栅(FBG)的温度灵敏度约为10pm/℃。在铠装FBG温度传感器中,光栅粘贴于热膨胀系数较大的金属片(如Cu和Al)表面的线槽内。金属片受热膨胀将衍生出光栅的轴向热应变,从而提高光纤光栅的温度响应灵敏度。在采用波分复用技术中的FBG的传感网络方案中,串联的3只光栅均置于温度控制器中。实验表明:当温度从20℃升至80℃时,Cu制和Al制铠装FBG温度传感器的表观温度灵敏度分别约提高34. 3, 42. 7pm/℃,测量重复性分别为2. 3, 2. 8pm。The temperature sensitivity of bare FBG(fiber Bragg grating) is 10pm/℃.In the metal-clad FBG temperature sensor,the FBG is bonded on the surface of metal fluted slice (such as Cu and Al) with biggish thermal expansion coefficient.The axial thermal strain of grating is derived from the thermal expansion of the metal slice.Consequently,the temperature sensitivity of grating is improved.In the scheme of the sensing network of FBG with wavelength division multiplex technique,the three series-wound gratings are placed in the temperature controller.The experiment indicates that the apparent temperature sensitivity of the copper-clad and the aluminium-clad FBG temperature sensors are separately enhanced to 34.3pm/℃ and 42.7pm/℃,the measurement reproducibility is 2.3pm and 2.8pm rospectively,when the temperature change is from 20℃ to (80℃.)

关 键 词：光纤BRAGG光栅 Bragg波长 热敏基片 温度传感器 热应变 表观温度敏感系数 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]