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| 光纤布喇格光栅沉降传感器 | |
| 引用本文： | 杜磊,龚元,吴宇,饶云江,赵天.光纤布喇格光栅沉降传感器[J].光子学报,2014,40(12):1878-1880. |
| 作者姓名： | 杜磊 龚元 吴宇 饶云江 赵天 |
| 作者单位： | 1. 电子科技大学 光纤传感与通信教育部重点实验室,成都 611731; 2. 重庆理工大学 汽车零部件制造及检测技术教育部重点实验室,重庆 400050 |
| 基金项目： | 重庆理工大学汽车零部件制造及检测技术教育部重点实验室开放基金资助 |
| 摘 要： | 根据光纤布喇格光栅的光学传感原理,提出了一种基于悬臂梁及金属弹性膜片的光纤布喇格光栅沉降传感器结构,对其传感特性进行了实验研究.实验通过产生水的液位差来模拟地基沉降,分析结果显示,光纤布喇格光栅中心反射波长漂移对液位差呈现良好的线性关系,线性度高于0.999,灵敏度可达-2.11 pm/mm.通过改变悬臂梁厚度和有效长度,可以对传感器测量范围和灵敏度进行调整,以满足各种应用场合.综合实验结果,该传感器在桥梁、铁路地基等沉降监测方面具有重要意义. |
| 关 键 词： | 液位传感器 光纤布喇格光栅 金属弹性膜片 悬臂梁 |
| 收稿时间： | 2011-06-01 |
Fiber Bragg Grating Settlement Sensors |
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| DU Lei,GONG Yuan,WU Yu,RAO Yun-jiang,ZHAO Tian.Fiber Bragg Grating Settlement Sensors[J].Acta Photonica Sinica,2014,40(12):1878-1880. | |
| Authors: | DU Lei GONG Yuan WU Yu RAO Yun-jiang ZHAO Tian |
| Institution: | 1. Key Lab of Optical Fiber Sensing &|Communications (Ministry of Education) University of Electronic Science &|Technology of China, Chengdu 611731, China; 2. Key Laboratory of Manufacture and Test Techniques for Automobile Parts (Ministry of Education), Chongqing University of Technology, Chongqing, 400050, China |
| Abstract: | According to the fiber Bragg gratings optical sensing principle,a novel structure of fiber Bragg settlement sensors are developed,based on a cantilever beam and a metal diaphragm.The sensing characteristics are investigated.In the experiment,water level differences to are used simulate foundation settlement.The experimental results indicate that sensitivity of -2.11pm/mm and good linearity of higher than 0.999 can be obtained.By changing the thickness and the effective length of cantilever beam,the measurement range and sensitivity of the sensor can be optimized to meet various applications.From the results,it is known that the sensor will play an important role in bridges,railways and other foundation settlement monitoring. |
| Keywords: | Settlement sensor Fiber Bragg Grating (FBG) Metal diaphragm Cantilever beam |
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