Fiber Bragg grating (FBG) based sensors have been extensively used to monitor the deformation of structures (i.e., aircrafts, ocean platforms, bridges, tunnels, pavements and high-speed railways), for the advantages of absolute measurement, anti-electromagnetic interference, high precision, multiplexing and integration of sensing network over other sensors. However, due to the temperature-sensitive characteristics of FBG, temperature compensation should be considered to remove the thermal effect, so as to accurately reflect the strain information of the monitored structure. Traditional temperature-compensation method ignores the influence of the interfacial interaction between the structure and the bonded FBG on the measured data, which may lead to the compensated value smaller than the actual value. For this reason, modified temperature-compensation function with the influence of interfacial action considered is proposed to enhance the measurement accuracy of FBG based sensors. Laboratory tests on two kinds of samples under temperature loading have been conducted to validate the effectiveness of the proposed function. Improved temperature-compensation measures for FBG based sensors applied to structures under different loading conditions (i.e., high and low temperature, static and dynamic mechanical load) are discussed, with the temperature hysteresis of FBG sensing elements considered. The study in this paper presents a scientific instruction for the better interpretation of testing data measured by FBG sensors and the accurate use of FBG sensors for the temperature and strain detection of structures in engineering

基于光纤布拉格光栅（FBG）的传感器已被广泛用于监视结构（例如飞机，海洋平台，桥梁，隧道，人行道和高速铁路）的变形，具有绝对测量，抗电磁干扰，与其他传感器相比，传感网络具有高精度，多路复用和集成。但是，由于FBG的温度敏感特性，应考虑进行温度补偿以消除热效应，以便准确反映所监视结构的应变信息。传统的温度补偿方法忽略了结构与键合的FBG之间的界面相互作用对测量数据的影响，这可能导致补偿值小于实际值。为此原因，为了提高基于光纤光栅的传感器的测量精度，提出了一种考虑了界面作用影响的改进的温度补偿函数。已经在温度负载下对两种样品进行了实验室测试，以验证所提出功能的有效性。讨论了在不同负载条件下（即高温和低温，静态和动态机械负载）应用于结构的基于FBG的传感器的改进的温度补偿措施，同时考虑了FBG传感元件的温度滞后。本文的研究为更好地解释FBG传感器测量的测试数据以及在工程中正确使用FBG传感器进行结构的温度和应变检测提供了科学指导