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A Fiber Optic Sensored Triaxial Testing Device

机译:光纤传感三轴测试装置

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摘要

The physical quantities involved in a triaxial testing device have mostly been monitored with electric sensors. These sensors are currently subject to short circuit when submerged under water and electromagnetic interference (EMI). Waterproofing and EMI noise filtration have often been a challenge to the triaxial test set-up. These drawbacks can be substantially minimized when using optic fiber sensors. The optic fiber Bragg grating (FBG) sensors have the additional advantage of being partially distributive where multiple sensors can share the same signal transmission line. Taking advantage of these unique capabilities, the authors explored the possibility of converting all pressure/force and linear displacement transducers in a triaxial testing device into FBG based sensors. A series of shearing tests on unsaturated and saturated soil specimens were carried out using the new FBG sensored triaxial testing device. In most cases, the measurement of physical quantities was paired with electric sensors so that the results can be compared. This paper describes the principles of the individual FBG sensor designs and demonstrates their applications in triaxial testing.
机译:三轴测试设备中涉及的物理量主要由电传感器监控。这些传感器当前浸入水中和受到电磁干扰(EMI)时会发生短路。防水和EMI噪声过滤通常是三轴测试装置的挑战。当使用光纤传感器时,这些缺点可以被基本减少。光纤布拉格光栅(FBG)传感器的另一个优点是在多个传感器可以共享同一条信号传输线的情况下是部分分布式的。利用这些独特的功能,作者探索了将三轴测试设备中的所有压力/力和线性位移传感器转换为基于FBG的传感器的可能性。使用新型FBG传感三轴测试设备对不饱和和饱和土壤样品进行了一系列剪切测试。在大多数情况下,将物理量的测量与电传感器配对使用,以便可以比较结果。本文介绍了各个FBG传感器设计的原理,并演示了它们在三轴测试中的应用。

著录项

  • 来源
    《Geotechnical testing journal》 |2011年第2期|p.103-111|共9页
  • 作者单位

    Dept. of Civil Engineering, National Chiao-Tung Univ., Hsinchu, Taiwan;

    G.T. International, Nanjing S. Rd., Section 3, No. 215, 2F, Taipei, Taiwan;

    Dept. of Civil Engineering, National Chiao-Tung Univ., Hsinchu, Taiwan;

    Department of Civil Engineering, National Chiao-Tung Univ.,Hsinchu, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fiber bragg grating; triaxial test; unsaturated soil; sand;

    机译:光纤布拉格光栅三轴试验非饱和土壤砂;
  • 入库时间 2022-08-18 00:11:57

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