用于航天环境的布拉格光栅温度传感器灵敏度与精度研究

Study on Sensitivity and Accuracy of Bragg grating Temperature Sensor for Spacecraft Environment

摘要:

光纤光栅温度传感器具有着电隔离、抗干扰、载荷量小等优点，极其适合工程领域的传感测量。目前光纤光栅温度传感器已在我国民用领域得到了广泛的应用，但在其航天领域中的研究才刚刚起步。理论上，光纤光栅传感器是可以应用于航天领域中，但由于太空中不同于地面的复杂特殊的空间环境：低温、真空、辐射等，在应用时必须考虑这些因素对传感造成的负面影响。提出使用金属化技术对光纤光栅进行增敏，制作了金属涂覆增敏的光纤布拉格光栅温度传感器，并研究了其在低温环境下的温度灵敏度与精度，其在低温环境下的温度灵敏度在6pm/°C以上，重复精度约为±1.7°C，可为光纤传感技术在航天领域应用等相关研究提供参考。

Abstract:

The Fiber Bragg Grating sensor has the advantages of electrical isolation, anti-interference, and small load, which is extremely suitable for sensing measurement in engineering fields. At present, FBG sensors have been widely used in China's civil field, but research in aerospace field has just begun. In theory, FBG sensors can be used in the aerospace field, but due to the complex and special space environment different from the ground in space: low temperature, vacuum, radiation, etc., the negative impact of these factors on sensing must be considered in the application. In this paper, we use the electroless mental plating technology to fabricate a metal-coated sensitized fiber Bragg grating temperature sensor, and study its temperature sensitivity and accuracy under low temperature environment, the temperature sensitivity in low temperature environment is above 6pm/°C, and the repetition accuracy is about±1.7°C. which can provide reference for the aerospace research of FBG sensors technology.