中国激光, 2003, 30 (1): 71, 网络出版: 2006-06-27   

利用单光纤光栅实现力学量垂直感测的研究

Study of Sensing and Measurement for Vertically Mechanical Quantities Using Single Fiber Grating
作者单位
南开大学现代光学研究所,天津,300071
摘要
通过改进悬臂梁自由端结构设计,利用光纤光栅波长绝对编码的特性,实现了利用单光纤光栅对应力、位移进行了垂直感测。理论分析和实验结果证明,通过监测粘贴于悬臂梁固定端附近的光纤光栅波长变化的大小和指向,能够感测应力、位移等力学量的大小及方向。在相互垂直的方向上,获得的应力实验灵敏度分别为1.87 nm/N和3.40 nm/N, 位移实验灵敏度分别为0.23 nm/mm和0.41 nm/mm。
Abstract
Based on the characteristic of the fiber grating wavelength absolute encoding, the vertical sensing measurements of the stress, displacement have been realized by means of the improving the structure design of the free end of the cantilever beam. The theoretical analyses and the experimental results indicate that the magnitudes and the vertical directions of the mechanical quantities, such as stress, displacement and etc. can be sensed and measured through monitoring the value and direction of the wavelength shift of the fiber grating that is bonded to the near fixed end of the cantilever beam. In the vertical directions, the experimental sensitivities of the stress are 1 87 nm/N and 3 40 nm/N, the experimental sensitivities of the displacement are 0 23 nm/mm and 0 41 nm/mm, respectively.

张伟刚, 刘艳格, 王跃, 开桂云, 赵启大, 董孝义. 利用单光纤光栅实现力学量垂直感测的研究[J]. 中国激光, 2003, 30(1): 71. 张伟刚, 刘艳格, 王跃, 开桂云, 赵启大, 董孝义. Study of Sensing and Measurement for Vertically Mechanical Quantities Using Single Fiber Grating[J]. Chinese Journal of Lasers, 2003, 30(1): 71.

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