宏弯型光纤位移传感器的分析与设计

Analysis and Design of Macro-Bend Optical Fiber Displacement Sensor

提出了一种宏弯型光纤位移传感器的优化设计方法。通过分析聚合物光纤的宏弯光损耗特性,结合光纤宏弯物理结构的建模仿真,设计出了线性度好、量程大、结构简单的宏弯型光纤位移传感器,并得到了实验验证。仿真和实验结果表明,该光纤传感器的理论线性度最高可达0.99997,实验测试线性度可达0.99922,测量量程可达27 mm,可以满足实际应用需要。

A method for optimizing macro-bend fiber displacement sensor is proposed.By analyzing the macro-bending loss properties of polymer fiber and modeling the physical structure of the macro-bend fiber,a macro-bend optical fiber sensor with good linearity,a large measuring range and a simple structure has been designed and experimentally proven.The simulation and experimental results show that the theoretical linearity of the optimized sensor can reach up to 0.99997,the test linearity can reach 0.99922,and the measurement range is 27 mm,which can meet most practical requirements.