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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。
Proposed a new type of multimode fiber torsion sensor of the basic principles and sensing structure, deduced the torsional angle of the theoretical formula, the sensor’s torsion angle and multimode fiber power loss linearly. Bi-directional symmetrical linear torsional sensing with a sensitivity of 0.375 dB / deg. Is technically achieved at a ± 40 ° torsional angle, and a sensitivity of 0.592 dB / deg. Is obtained with a bi-directional asymmetric linear torsional sensing.