光纤布拉格光栅传感器交叉敏感问题的研究进展

Progress in Cross Sensitivity of Fiber Bragg Grating Sensor

应变和温度等外界因素的变化会使光纤布拉格光栅(FBG)反射波的中心波长发生漂移。在应变传感测量中,根据中心波长的漂移量无法直接得到对应的应变量,这种应变和温度交叉敏感的问题严重制约着FBG传感器的测量精度和应用,阻碍了传感监测技术的实用化。为了消除温度的影响,各国研究人员根据不同算法、材料、封装结构等提出了多种解决方案。根据对温度的不同处理方法,将这些解决方案分为温度分离法和温度补偿法,并分析了每种方法的优缺点。

The changes of external factors such as temperature and strain can cause the center wavelength drift of fiber Bragg grating （FBG） reflection wave. Strain cannot be directly measured according to the center wavelength drift in strain sensing measurement. The problem of temperature and strain cross sensitivity seriously restricts the measurement precision and the application of FBG sensor, which hinders the sensing monitoring technology to be practical. Many researchers have proposed various solutions to eliminate the influence of temperature according to different algorithms, materials, packaging structures, and so on. According to the different methods of temperature processing, the solutions can be divided into temperature separation method and temperature compensation method. The advantage and disadvantage of each method are analyzed.