光子学报, 2017, 46 (10): 1006003, 网络出版: 2017-11-24
光纤布拉格光栅传感器应变传递耦合机理分析
Coupled mechanism Analysis of strain transfer of Fiber Bragg Grating Sensors
应变传递率 表面粘贴 剪应力 数值解 光纤布拉格光栅 预应变 应力 Strain transfer rate Surface-bonding Shear stress Numerical solution Fiber Bragg Grating Pre-strain Stress
摘要
建立了半平面体与光纤布拉格光栅传感器双向耦合的应变传递理论, 得到表面粘贴式光纤布拉格光栅传感器测量应变与半平面体应变之间的关系.将理论解、有限元解和实验数据进行对比以验证该理论的正确性, 并分析了应变传递率与半平面体弹性模量、半粘结长度的关系.结果表明: 理论解与实验值非常接近, 误差在4%以内, 应变传递率随着半平面体弹性模量的增大、半粘结长度的增长而逐渐增大, 对光纤布拉格光栅传感器的设计和应用具有一定的参考价值.
Abstract
Strain transfer theory of two-way coupled between the Half-plane and the Fiber Bragg Grating sensor was established, the relationship between the measured strain of the surface-bonding Fiber Bragg Grating sensor and the strain of the Half-plane was obtained. The theoretical solution, the Finite Element solution and the experimental date were compared to verify the correctness of the theory, and the relationship between the strain transfer rate and the Young′s modulus of the Half-plane and the half bonding length was analyzed. The result show that the error of the theoretical solution and experimental value is very small, less than 4%, the strain transfer rate increases with the increasing both the Young′s modulus of the Half-plane and the half bonding length, it has some reference value for the design and application of Fiber Bragg Grating sensors.
吴入军, 郑百林, 陈田, 常远, 付昆昆. 光纤布拉格光栅传感器应变传递耦合机理分析[J]. 光子学报, 2017, 46(10): 1006003. WU Ru-jun, ZHENG Bai-lin, CHEN Tian, CHANG Yuan, FU Kun-kun. Coupled mechanism Analysis of strain transfer of Fiber Bragg Grating Sensors[J]. ACTA PHOTONICA SINICA, 2017, 46(10): 1006003.