| 双套管式光纤Bragg光栅温度传感器 |
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| 引用本文： | 李川,由静,李英娜,万舟,陈焰,许晓平,许江淳.双套管式光纤Bragg光栅温度传感器[J].光学技术,2010,36(2). |
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| 作者姓名： | 李川 由静 李英娜 万舟 陈焰 许晓平 许江淳 |
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| 作者单位： | 昆明理工大学,信息工程与自动化学院,云南,昆明,650051 |
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| 基金项目： | 云南省科技计划(2007F181M)资助课题 |
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| 摘 要： | 研制了一种双套管式光纤Bragg光栅温度传感器,以实现无外力作用的温度测量。其中外套管隔离外加应力应变,在内套管内松弛地放置光栅以隔离封装结构的表观热应变。引入引出尾纤穿过带孔螺栓,以探测多个串联光栅。为了避免光栅处于张拉状态,封装在外套管1、外套管2和内套管中的光纤余长应分别大于1.4mm,1.8mm和0.4mm。试验结果表明,该光栅传感器的温度响应灵敏度为9.671×10-3nm/℃,温度测量分辨率为0.1℃。当水温从20℃跃变到70℃时,该传感器的温度响应时间分别为t0.5=15±2s和t0.9=52±4s。当水温从70℃跃变到20℃时,该传感器的温度响应时间分别为t0.5=26±9s和t0.9=63±8s。
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| 关 键 词： | 双套管 光纤Bragg光栅 温度 外加应力应变 表观热应变 温度响应灵敏度 温度响应时间 |
Double thimble type fiber Bragg grating temperature sensor |
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| LI Chuan,YOU Jing,LI Ying-Na,WAN Zhou,CHEN Yan,XU Xiao-ping,XU Jiang-chun.Double thimble type fiber Bragg grating temperature sensor[J].Optical Technique,2010,36(2). |
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| Authors: | LI Chuan YOU Jing LI Ying-Na WAN Zhou CHEN Yan XU Xiao-ping XU Jiang-chun |
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| Institution: | Faculty of Information Engineering and Automation;Kunming University of Science and Technology;Kunming 650051;Yunnan;China |
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| Abstract: | A double thimble type fiber Bragg grating temperature sensor is developed to measure temperature without outside force,where an outer thimble insulates the applied stress strain,and the grating is freely placed in an inner thimble to insulate the apparent thermal strain of its encapsulation structure.The lead-in and lead-out fiber pigtail is threaded through the opening of bolt with pin hole to detect a series of gratings.To avoid the tensile state of grating,the fiber excess lengths are >1.4 mm,>1.8 mm and... |
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| Keywords: | double thimble fiber Bragg grating temperature applied stress strain apparent thermal strain temperature response sensitivity temperature response time |
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