Enhanced sensitivity fibre Bragg grating (FBG) load sensor
Enhanced sensitivity fibre Bragg grating (FBG) load sensor
复制标题
DOI：
10.1088/0957-0233/21/9/094006
复制
发表时间：
2010-09-01
影响因子：
2.4
通讯作者：
Tatam, Ralph P.
中科院分区：
文献类型：
--
作者：
Correia, Ricardo;Chehura, Edmon;Tatam, Ralph P.
基于嵌入在环氧树脂立方体内的光纤布拉格光栅（FBG）的一个分段的横向加载的负载传感器的表征。当环氧树脂立方体横向于光纤轴加载时，其变形将载荷转换为沿光纤轴沿着的应变，这改变了FBG的嵌入部分的周期。这在FBG的带宽内产生了光谱衰减，其绝对波长线性依赖于所施加的负载。与裸光纤的直接横向加载相比，该技术将FBG对横向加载的灵敏度提高了15倍，达到2.9 x 10（-2）+/- 0.01 nm N-1，并且还保护光纤免受加载点处的机械损伤。
The characterization of a load sensor based on the transverse loading of a subsection of a fibre Bragg grating (FBG) embedded within a cube of epoxy resin is presented. When the epoxy resin cube is loaded transverse to the axis of the fibre, its deformation transduces the load to a strain along the axis of the optical fibre, which changes the period of the embedded section of the FBG. This creates a spectral dropout within the bandwidth of the FBG, with an absolute wavelength that is linearly dependent on the applied load. This technique enhances the sensitivity of the FBG to transverse loading by a factor of 15, to 2.9 x 10(-2) +/- 0.01 nm N-1, when compared to the direct transverse loading of a bare fibre, and also protects the fibre from mechanical damage at the loading point.