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Characterisation of an optical strain gauge for pantograph applications

机译：受电弓应用的光学应变仪的特性

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摘要

An optical strain gauge is developed and characterised for an active pantograph for high-speed electrical trains applications. The pantograph is subjected to a continuous impact forces when it makes contact with the 25 kV overhead AC line. The carbon based pantograph head is susceptible to crack damage due to these impacts An optical strain gauge based on the photo-elastic effect has been developed to monitor on line the contact force applied to the pantograph. The sensing system exploits the concept of chromatic modulation that can be produced by spectral changes induced by a controlled birefringence. Moreover the chromatic sensing technique is independent of the light intensity and provides total electrical isolation. The developed optical strain gauge was assessed to evaluate its performance and to find the range of operation. Static, hysterisis, repeatability and dynamic tests were carried out and the results compared to the theory when applicable. In the static test, it was found that the force against dominant wavelength was linear in the range of 0 to 80 N and became progressively non-linear for forces above 80 N, this is in a good agreement with the theory. These tests were carried out several times over a long period of time, and the results showed a good repeatability, although an acceptable degree of hysterisis was noted. Finally the resistance of the optical strain gauge was tested against dynamically varying loads and found that it exhibited a good resistance. These tests proved the suitability of this proposed optical strain gauge for the development of an active pantograph for high-speed electrical trains applications.
机译：开发了一种光学应变仪，并针对高速电车应用中的有源受电弓进行了表征。受电弓与25 kV架空AC线接触时会受到连续的冲击力。由于这些影响，碳基受电弓头易受裂纹损坏的影响。已开发出一种基于光弹性效应的光学应变仪，以在线监测施加在受电弓上的接触力。传感系统采用了色调制的概念，该色调制可以由受控双折射引起的光谱变化产生。此外，彩色传感技术与光强度无关，并提供了完全的电隔离。对开发的光学应变仪进行了评估，以评估其性能并确定操作范围。进行了静态，磁滞，可重复性和动态测试，并将结果与​​适用的理论进行了比较。在静态测试中，发现针对主波长的力在0至80 N的范围内呈线性，而对于80 N以上的力，则逐渐变为非线性，这与该理论非常吻合。这些测试经过很长时间进行了几次，结果显示出良好的可重复性，尽管注意到了可接受的滞后程度。最后，对光学应变仪的电阻进行了测试，以抵抗动态变化的负载，并发现它具有良好的电阻。这些测试证明了该提议的光学应变仪适用于开发适用于高速电车应用的有源受电弓。

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  • 作者

    Khanniche, Rachid.;

  • 作者单位

    Swansea University (United Kingdom).;

  • 授予单位 Swansea University (United Kingdom).;
  • 学科 Electrical engineering.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 136 p.
  • 总页数 136
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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