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Surface-Mounted Bare and Packaged Fiber Bragg Grating Sensors for Measuring Rock Strain in Uniaxial Testing

机译:用于测量单轴检测中岩体应变的表面安装的裸和包装纤维布拉格光栅传感器

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摘要

The paper explores the possibility of using high-resolution fiber Bragg grating (FBG) sensing technology for on-specimen strain measurement in the laboratory. The approach provides a means to assess the surface deformation of the specimen, both the axial and radial, through a chain of FBG sensor (C-FBG), in a basic setup of a uniaxial compression test. The method is cost-effective, straightforward and can be commercialized. Two C-FBG; one was applied directly to the sample (FBGBare), and the other was packaged (FBGPack) for ease of application. The approach measures the local strain with high-resolution and accuracy levels that match up to the existing local strain measuring sensors. The approach enables the evaluation of small-strain properties of the specimen intelligently. The finite element model analysis deployed has proven the adaptability of the technique for measuring material deformation. The adhesive thickness and packaging technique have been shown to influence the sensitivity of the FBG sensors. Owing to the relative ease and low-cost of instrumentation, the suggested method has a great potential to be routinely applied for elemental testing in the laboratory.
机译:本文探讨了在实验室中使用高分辨率光纤布拉格光栅(FBG)传感技术的可能性。该方法提供了评估标本的表面变形,通过FBG传感器(C-FBG)的基本设置在单轴压缩试验的基本设置中的轴向和径向。该方法具有成本效益,直截了当,可以商业化。两个C-FBG;一种被直接施用于样品(FBGBARE),另一种包装(FBGPACK)以易于应用。该方法测量局部应变,高分辨率和精度水平匹配,匹配现有的局部应变测量传感器。该方法能够智能地评估标本的小菌株。部署的有限元模型分析已经证明了该技术测量材料变形的适应性。已经显示粘合剂厚度和包装技术来影响FBG传感器的灵敏度。由于仪器的相对缓解和低成本,所建议的方法具有巨大的潜力,可以在实验室进行元素测试。

著录项

  • 期刊名称 Sensors (Basel Switzerland)
  • 作者单位
  • 年(卷),期 2021(21),9
  • 年度 2021
  • 页码 2926
  • 总页数 20
  • 原文格式 PDF
  • 正文语种
  • 中图分类
  • 关键词

    机译:链式FBG传感器;变形的测量;单轴压缩试验;弹性行为;应变转移系数;

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