Strain transfer factors of pasted FBG on bending part surface

LI Tian-liang; TAN Yue-gang; ZHANG Xiang; WEI Lai; DONG Yan-fang

doi:10.3788/OPE.20152305.1254

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Strain transfer factors of pasted FBG on bending part surface

更新时间：2020-08-13

- Strain transfer factors of pasted FBG on bending part surface
- Optics and Precision Engineering Vol. 23, Issue 5, Pages: 1254-1264(2015)
- 作者机构：
  
  武汉理工大学机电工程学院,湖北武汉,430070
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152305.1254
  CLC： TN253
- Received：29 December 2014，
  
  Revised：12 February 2015，
  
  Published：25 May 2015
- 稿件说明：
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李天梁, 谭跃刚, 张翔等. 受弯件上粘贴型光纤布拉格光栅的应变传递规律[J]. 光学精密工程, 2015,23(5): 1254-1264

LI Tian-liang, TAN Yue-gang, ZHANG Xiang etc. Strain transfer factors of pasted FBG on bending part surface[J]. Editorial Office of Optics and Precision Engineering, 2015,23(5): 1254-1264
李天梁, 谭跃刚, 张翔等. 受弯件上粘贴型光纤布拉格光栅的应变传递规律[J]. 光学精密工程, 2015,23(5): 1254-1264 DOI： 10.3788/OPE.20152305.1254.

LI Tian-liang, TAN Yue-gang, ZHANG Xiang etc. Strain transfer factors of pasted FBG on bending part surface[J]. Editorial Office of Optics and Precision Engineering, 2015,23(5): 1254-1264 DOI： 10.3788/OPE.20152305.1254.

摘要

考虑粘贴型光纤布拉格光栅(FBG)测量受弯件时测试效果易受到粘贴参数的影响

研究了受弯件的粘贴型FBG的应变传递规律。首先

通过理论分析建立了受弯件粘贴型FBG应变传递模型

确定了相关影响参数;然后

利用仿真法分析了影响应变传递的各个参数;最后

通过实验分析验证了理论与仿真分析结论。实验与仿真对比分析表明:黏胶长度与黏胶中间层厚度是影响受弯件粘贴型FBG应变传递率的主要因素;黏胶的高度/宽度对应变传递率的影响较小

测试的静态特性指标相近

应变传递率分别在96%/95%上下小范围内波动。黏胶长度大于FBG名义长度2倍时

静态特性明显优于黏胶长度较短者

实验应变传递率约为95%。FBG的应变传递率随黏胶中间层厚度的增大而上升

甚至超过100%

可用于对粘贴型FBG传感器的增敏。获得的结论对采用粘贴型FBG对受弯件进行高精度测试具有指导意义。

Abstract

When pasted Fiber Bragg Gratings (FBGs) are used to measure bending parts

the testing results are easily affected by paste parameters. This article researches the strain transfer factors of a pasted FBG under bending parts. Firstly

a pasted FBG strain transfer model was established by theoretical analysis

and the related parameters were determined. Then

the strain transfer parameters were qualitatively analyzed by a simulated analysis method. Finally

the results of theory and simulated analysis were verified by an experimental analysis. The experiment and simulation results show that the length and the middle layer thickness of glue have dominating effects on FBG strain transfer rate under bending parts. The thickness/width of glue are secondary factors

they have a similar result for static properties

and there are small fluctuations near by 96%/95%

respectively.When the length of glue is more than 2 times of FBG length

its static properties are obviously better than that of shorter length

and the strain transfer rate is about 95%. Moreover

the strain transfer rate of the FBG rises with the augment of middle layer thickness

sometimes even more than 100%

so it can be used to enhance the sensitization of a pasted FBG sensor. In the conclusion

the results offer a guidance for the high precision measurement of bending parts by the pasted FBGs.

关键词

Keywords

references

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