| 杨建宇,梁磊,唐浩冕,谢官模,徐刚.一种温度自补偿的高灵敏度FBG双向倾角传感器[J].光电子激光,2020,31(4):351~356 |
| 一种温度自补偿的高灵敏度FBG双向倾角传感器 |
| High sensitivity two directional FBG inclination sensor with temperature compen sation |
| 投稿时间：2020-01-19 |
| DOI： |
| 中文关键词: 光纤布拉格光栅(FBG) 双向倾角传感器 双轴圆弧铰链 温度自补偿 |
| 英文关键词:fiber Bragg grating(FBG) two-directional inclination sensor biaxial arc hin ge temperature compensation |
| 基金项目:国家重点研发计划(National Key R&D Program of China,2018YFF0214700) 、广东省中山市科技发展专项(2017F2FC0003)和广东省中山市重大科技专项(2019sdr001)]资助项目 (1.武汉理工大学 光纤传感技术国家工程实验室,湖北 武汉 430070； 2.武汉理工大学 理学院,湖北 武汉 430070； 3.湖北工程学院 机械工程学院,湖北 孝感 432000) |
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| 中文摘要: |
| 为实现对高铁站房空间网架结构变形的监测,并 针对光纤布拉格光栅(FBG)对应钛合金TA2杨氏模量较小等材料特性,本文首次设计了一种 圆弧铰链式FBG双向倾角传感器,同时在此基 础上进行了理论分析、有限元模拟和传感器性能试验。并进行了结果对比与误差分析。 该传感器的敏感结构是双轴圆弧铰链 ,通过将预拉伸后的FBG粘贴在与圆弧铰链相连的上下基座的导纤槽,实现对被监测对象的 倾斜角度双向监测。实验 结果表明,该FBG双向倾角传感器的灵敏度为168.43 pm/deg,有效监 测范围为±15°,在监 测范围内线性相关度可达0.999,同时消除了 温度影响,适用于温度 变化较大且精度要求较高的工作环境,特别是高铁站房顶部网架结构变形的实时监测。 |
| 英文摘要: |
| In order to monitor the deformation of the space grid structure of high-speed railway station buildings,and to address the problem that the fiber Bragg grating (FBG) is sensitive to both strain and temperature,a biaxial arc h inge FBG inclination sensor,using the titanium alloy TA2which possesses low You ng′s modulus and other superior material properties,is designed at the first ti me in this paper.Based on this design,the oretical analysis,finite element simulation as well as sensor performance tests are carried out respectively.At the meantime result comparison and error analysi s are also presented comprehensively. The sensor′s sensitive structure is a biaxial arc hinge.The pre-stretched FBG is attached to the fiber guide grooves of the upper and lower bases connected to the arc hinge to realize two-directional monitoring of the object′s tilt angle.Experimental res ults show that the sensitivity of the biaxialarc hinge FBG inclination sensor is 168.43p m/deg,the effective moni toring range is ±15°,and the linear correlation within the monitoring range c an reach 0.9999.At the same time,the temperature effect is el iminated successfully,which i s suitable for large temperature changes and high accuracy requirements,especia lly for deformation monitoring of the space grid structure of high-speed ra ilway station buildings. |
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