光纤布喇格光栅应变传感灵敏度的分析

Analysis on BFG Strain Sensor Sensitive

分析了光纤布喇格光栅分别在轴向应变和径向应变情况下的传感特性,在理论上推导了光纤布喇格光栅的应变—波长位移数学模型,讨论了轴向应变灵敏度和径向应变灵敏度的异同,并且给出了计算机仿真实验结果.光纤布喇格光栅传感器在实际应用中,安装方位对光纤应变测量有很大影响,分析了轴向应变和径向应变同时存在的情况下,不同的安装方位及其不同的应变比导致光纤布喇格光栅传感灵敏度的变化,同时给出了计算机仿真实验结果.

In this paper,the sensing properties of Fiber Bragg Grating （BFG）is analyzed,the mathematics patterns of BFG strain-wavelength shifting in the theory is inferred,and computer simulation experiments is made out.In the realistic application of BFG,installation position affects fiber strain measurement a lot.In this paper,that different direction and ratio of radium-strain to axis-strain lead to the change BFG strain-sensitive is analyzed.