新型双向可调光纤扭转传感器的设计与实现

Design and Realization on Novel Fiber Torsional Angle Sensor with Bidirectional Tuning

提出一种新型多模光纤扭转传感器的基本原理和传感结构,推导了扭角传感的理论公式,该传感器的扭角与多模光纤的功率损耗呈线性关系。在±40°扭角范围内,技术上实现了灵敏度为0.375dB/deg.的双向对称线性扭转传感;在双向非对称线性扭转传感中,获得了0.592dB/deg.的灵敏度。

The basic principle and the sensing structure of a novel torsion sensor are proposed. The theoretical formulas of torsional angle sensing are derived and the torsional angle of this sensor is linear to the power loss of the multi-mode fiber. In the range of the torsional angle between -40° and +40°, the torsion sensing has been realized technologically with the sensitivities 0.375 dB/degree for the symmetrically bidirectional linear torsion sensing and 0.592 dB/degree for the bidirectional unsymmetrical linear torsion sensing.