Large range FBG sensor for ship structure health monitoring

WU Jing; WU Han-pin; HUANG Jun-bin; GU Hong-can

doi:10.3788/OPE.20142202.0311

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Large range FBG sensor for ship structure health monitoring

Modern Applied Optics | 更新时间：2020-08-13

- Large range FBG sensor for ship structure health monitoring
- Optics and Precision Engineering Vol. 22, Issue 2, Pages: 311-317(2014)
- 作者机构：
  
  1. 海军工程大学兵器工程系,湖北武汉,430033
  2. 武汉工程大学光电子系统技术研究所,湖北武汉,430205
  3. 海军工程大学管理工程系,湖北武汉,430033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142202.0311
  CLC： TN253;U661.7
- Received：28 May 2013，
  
  Published：20 February 2014
- 稿件说明：
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吴晶,吴晗平,黄俊斌等. 用于船舶结构监测的大量程光纤布拉格光栅应变传感器[J]. 光学精密工程, 2014,22(2): 311-317

WU Jing,WU Han-pin,HUANG Jun-bin etc. Large range FBG sensor for ship structure health monitoring[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 311-317
吴晶,吴晗平,黄俊斌等. 用于船舶结构监测的大量程光纤布拉格光栅应变传感器[J]. 光学精密工程, 2014,22(2): 311-317 DOI： 10.3788/OPE.20142202.0311.

WU Jing,WU Han-pin,HUANG Jun-bin etc. Large range FBG sensor for ship structure health monitoring[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 311-317 DOI： 10.3788/OPE.20142202.0311.

摘要

平板结构的贴片式光纤光栅传感器应变测量范围较小

难以满足船舶结构健康监测中的应变测量要求。本文采用不锈钢材质

设计了一种采用环形平面弹簧和平板复合结构的贴片式传感器

通过环形平面弹簧结构将复合结构的大应变转化为光栅的小应变

降低被测物体与光栅之间的应变耦合系数

实现了大应变测量。理论分析了复合结构的传感原理

通过有限元方法仿真了该结构的应力分布

结果证明了该结构能够实现大应变测量。将传感器胶粘在特种钢试件上进行了载荷试验

试验结果表明:该复合结构传感器的量程大于20 000 με

且线性度较好

Abstract

Fiber Bragg Grating(FBG) sensor with a stickup plane structure can not test the strain precisely in ship structure health monitoring due to its small measuring range. For overcoming this problem

this paper designs a composite structure stickup FBG sensor composed of an annular plane spring and a slab on the basis of stainless steel. This kind of stickup FBG sensor can convert the large strain of composite structure into a small strain of FBG by the annular plane spring. By decreasing the strain coupling coefficient between FBG and tested structure

large-scale strain test is implemented. The sensing principle of the composite structure is analyzed and the stress and strain distribution of the stickup FBG sensor are simulated through finite element method. The simulation result demonstrates the feasibility of this structure in a large strain test. Finally

a loading experiment are performed on a special steel sample. The experiment result shows that this structure has a measuring range more than 20 000 με and good linearity. In addition

the correlation coefficient is up to 0.99. As a conclusion

the sensor is convenient for setting up because of the small volume

and can resolve the problem of large strain test in ship structure health monitoring with good performance.

关键词

Keywords

references

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