光纤Bragg光栅传感系统性能蜕化的研究

Study on the degeneration of FBG sensing system

为了解决光纤Bragg光栅(FBG)传感器性能蜕化对复用解调结果的影响,从FBG传感器的基本原理及链路出发,分析了FBG自身的光谱蜕化以及光纤链路和光源蜕化对解调结果的影响,提出了利用自适应解调阈值的解决方法,通过模拟仿真以及实验研究证实了相关理论的正确性与方法的可行性,将FBG传感器系统的出错率由原来的10.31%降低为0.63%,极大地提高了应变测量结果的准确性。

Based on the fundamental principle of FBG sensors,the effects of degeneration of Fiber Bragg grating(FBG) sensor,optical fiber link and the degeneration of light source on the multiplex demodulation were analyzed,and the method that uses self-adapting threshold to resolve the effects was proposed.The analog simulation and experiment research show that correlation theory is validity and the method is feasibility.Experimental results show that the error rate of the multiplex demodulation result reduces from 1...