光纤光栅传感测量中交叉敏感问题及解决方案

目前已有的基于光栅Bragg光栅的各种传感器，基本上都是直接或间接的利用应变和温度改变光纤的中心波长，以达到测试所需被测量的目的。但是中心波长不仅会随测试点的应变发生改变，还会随着环境温度的波动而发生变化，即存在温度和应变交叉敏感的问题。解决温度、应变交叉敏感问题即实现温度和应变的分离检测是光纤Bragg光栅应变传感器得到实际应用的重要前提1]。文章从理论上分析了引起交叉敏感的物理机制，较为全面地介绍了几种主要的解决方案，并对其主要特点进行了简单的分析。

Issue and Solutions of Cross-sensitivity of Fiber Grating Sensor Measurements

At present,the sensors based on FBG change the fiber wavelength almost by use of the strain and the temperature directly or indirectly in order to achieve the purpose of measurement.But the centre wavelength will change not only with the strain of the test point,but also with the environmental temperature,the cross-sensitivity.So,solving the cross-sensitivity is an important prerequisite for practical application of the sensors based on FBG.This paper describes the physical mechanics and several significant...