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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。
Changes in external factors such as strain and temperature can shift the center wavelength of FBG reflected waves. In the strain sensing measurement, the corresponding strain can not be directly obtained according to the shift of the center wavelength. The problem of cross-sensitivity of strain and temperature seriously restricts the measurement accuracy and application of the FBG sensor and hinders the practical application of the sensing monitoring technique . In order to eliminate the influence of temperature, researchers from all over the world propose various solutions according to different algorithms, materials and package structures. According to different temperature treatment methods, these solutions are divided into temperature separation method and temperature compensation method, and analyzed the advantages and disadvantages of each method.