表贴式胶体与光纤弹性模量比对应变传递率的影响

Effect of Elastic Modulus Ratio of Surface-Bonded Colloid and Optical Fiber on Train Transfer Rate

表贴式光纤布拉格光栅传感器包括光纤、中间层、基体三部分,通过分析胶体与光纤的弹性模量比,探究胶体的弹性模量、泊松比、长度等因素对基体到光纤平均应变传递率的影响。实验结果表明,与未考虑弹性模量比时的平均应变传递率相比,考虑弹性模量比时,平均应变传递率随胶体弹性模量、长度的增加而增加,随胶体厚度、泊松比的增加而减小,随胶体宽度的增加先增加后减小,研究结果更符合实际应用情况。

The surface-bonded fiber Bragg grating(FBG)sensor consists of three parts:fiber,middle layer,and matrix.By analyzing the ratio of the elastic modulus of the colloid to the optical fiber,the influences of the elastic modulus,Poisson's ratio,length and other factors of the colloid on the average strain transfer rate from the matrix to the optical fiber are explored.Compared with the average strain transfer rate without considering the elastic modulus ratio.Experimental results show that when considering the elastic modulus ratio,the average strain transfer rate increases with the increase of elastic modulus and length of colloid,decreases with the increase of thickness and Poisson's ratio of colloid,and first increases and then decreases with the increase of colloid width.The research results are more in line with the actual application.