光纤光栅大曲率传感器的试验研究

Experimental Research on FBG Sensor for Large Curvature Detection

介绍了一种新颖的大曲率传感器原理、设计及相关的试验研究。将光纤光栅应用于大曲率检测,光纤光栅采用预压应变封装在一种细径基材上,解决了光纤光栅大曲率测量中拉压不均衡问题。通过调整光纤的机械性能与光学性能,扩大了该类传感器的曲率测量范围。基于光谱分析仪器的波长分辨率0 06nm,曲率分辨率为±0 0845m-1,测量范围可大于±11m-1,理论上可达到±18m-1.

A novel design on FBG sensor for detection of large curvature is proposed.FBG sensor with prestrain is mounted on a slim cylindrical substrate to deal with the limitation caused by unbalanced mechanical property of the optical fiber.Based on the wavelength resolution of the optical spectrum analyzer(006 nm),the sensors curvature resolution is ±0084 5 m-1.Curvature large than ±11 m-1(with the maximum curvature±18 m-1theoretically)can be detected using this kind of sensor.