微弯型光纤双向扭转传感器

摘要

在深入研究扭转理论的基础上，设计了一种新颖的双向多模光纤缠绕型扭转传感器。传感结构的核心是两个缠在轴上绕向互反而参数相同的光纤段，利用它们相互间呈差动变化的微弯损耗对扭转参数进行检测。经实验测试表明，它具有良好的线性响应。对扭转检测的相关领域，所设计的这种传感器具有特殊的应用潜力。%Based on the study of torsion theory,a new bidirectional multimode fiber winding type torsion sensor was de-signed.The core of sensing structure is two fiber segments which are wrapped around the shaft by the opposite direc-tion and have the same parameters,and torsion parameters are detected by using microbend differential loss of two fi-ber segments.Test results show that the sensor has a good linear response to torsion.In the related fields of torsion de-tection,the sensor has a certain potential application.