This paper presents a novel type of strain-decoupled sensitized FBG temperature sensor and its applications to accurate aircraft thermal management. After sensitization of the fiber Bragg grating of the sensor, aluminum 7075-T6 is selected as the base material for full-coverage packaging. No direct contact between the packaging position and the structural parts of the fiber Bragg grating is proposed, so as to eliminate the influence of structural deformation on the temperature sensor. The experimental results show that the temperature sensitive speed is 40.4 pm/°C, four times that of the ordinary fiber grating. The deformation of the tensile test piece has no effect on the temperature sensor, which is consistent with the theoretical analysis. The sensor is attached to the aircraft cabin for practical engineering applications. The maximum temperature difference measured by the sensor is at most ±1 °C. This shows that the sensor can be relied on for temperature measurement and that its measurements are accurate enough for actual flight measurements of aircraft load spectrum.

本文介绍了一种新型的应变解耦敏化FBG温度传感器及其在精确飞机热管理中的应用。在对传感器的光纤布拉格光栅进行敏化之后，选择了7075-T6铝作为全覆盖包装的基础材料。在包装位置和光纤布拉格光栅的结构部件之间不建议直接接触，以消除结构变形对温度传感器的影响。实验结果表明，温度敏感速度为40.4 pm /°C，是普通光纤光栅的四倍。拉伸试样的变形对温度传感器没有影响，这与理论分析是一致的。该传感器连接到飞机机舱，用于实际工程应用。传感器测得的最大温差最大为±1°C。这表明可以依靠该传感器进行温度测量，并且其测量结果对于飞机载荷谱的实际飞行测量而言足够准确。