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利用多模光纤的微弯特性 ,提出并实现了一种新颖的缠绕式光纤扭角传感装置 ,其扭角测量范围大于 90°.给出了该装置的基本实验原理 .研究表明多模光纤的微弯损耗对扭角变化响应非常灵敏 ,其灵敏度可达 1 d B/ 1°.并且实验与理论符合得很好
Based on the microbending characteristics of multimode fiber, a novel wound fiber optic torsion sensor is proposed and implemented, whose measuring range of torsion angle is more than 90 °. The basic experimental principle of the device is given. The results show that multimode fiber The micro-bending loss is very sensitive to the torsion angle change and its sensitivity is up to 1 d B / 1 °. And the experiment is in good agreement with the theory