Xue Lifang, Liu Jianguo, Zhao Qida, Guo Tuan, Huang Guiling, Dong Xiaoyi
Modern Optics Institute of Nankai University, Tianjin 300071, China.
Appl Opt. 2006 Jul 10;45(20):4810-4. doi: 10.1364/ao.45.004810.
We designed and demonstrated what we believe to be a novel sensor for simultaneous measurement of stress and temperature. A fiber Bragg grating is flatly adhered to the surface of a loop thin-wall section beam. The theoretical analyses and the experimental results show that both the central wavelength shift and the chirped bandwidth of the grating reflection spectrum have a linear relationship with the stress and the temperature, respectively, and the slopes of them are different. Therefore, the temperature and stress can be discriminated by interrogating the chirped fiber grating. Moreover, we also investigated the strain of the loop thin-wall section beam, and the results show that the strain is cosine proportional to the double positional angle.
我们设计并展示了一种我们认为是用于同时测量应力和温度的新型传感器。一个光纤布拉格光栅被平整地粘贴在环形薄壁截面梁的表面。理论分析和实验结果表明，光栅反射光谱的中心波长偏移和啁啾带宽分别与应力和温度呈线性关系，且它们的斜率不同。因此，通过对啁啾光纤光栅进行询问，可以区分温度和应力。此外，我们还研究了环形薄壁截面梁的应变，结果表明应变与双位置角成余弦比例关系。
