风电叶片全尺寸测试是保障叶片运行与承载安全的必要手段，叶片测试中应变测量极为关键，可靠的封装、粘结、连接工艺是保证FBG传感器准确测量应变的先决条件。本项目以碳纤维封装FBG传感器为研究对象，以叶片全尺寸测试为应用背景，以提高FBG传感器使用可靠性为目标，围绕封装连接疲劳失效和性能退化造成FBG传感器可靠性降低的问题，深入研究交变载荷下封装层、粘结层、连接接头的疲劳寿命和性能退化规律，揭示封装层、粘结层、连接接头疲劳失效及性能退化对FBG传感器可靠性的影响机理；研究交变载荷下FBG传感器多性能参数退化过程和应变传递衰减特性，提出耦合封装-粘结-连接疲劳失效和性能退化的FBG传感器可靠性评价指标及其算法，形成FBG传感器可靠性评定规程，发展考虑封装连接工艺的FBG传感器可靠性评价技术。该研究成果可为碳纤维封装FBG传感器的封装粘结连接设计提供参考，为碳纤维封装FBG传感器可靠性评价提供方法。

Full-scale testing of wind turbine blades is a necessary means to ensure the safety of wind turbine blades in operation and load-bearing and the strain measurement is very important. Reliable packaging, bonding and connecting technology are prerequisites for accurate strain measurement by FBG sensors. This project takes the FBG sensor encapsulated with carbon fiber as the research object, and takes the full-scale fatigue test of blades as the application background, aiming at improving the reliability of the FBG sensor encapsulated with carbon fiber as the target. Focusing on the problem that the reliability of the FBG sensor decreases due to the fatigue failure and performance degradation of the encapsulated connection, the fatigue life and performance of the encapsulated layer, the bonded layer and the joint under alternating The degradation law reveals the influence of fatigue failure and performance degradation of packaging layer, bonding layer and joint on the reliability of carbon fiber encapsulated FBG sensor. The degradation process of multi-performance parameters and the attenuation characteristics of strain transfer of FBG sensor under alternating loads are studied, and the reliability evaluation index and algorithm of FBG sensor considering packaging-bonding-bonding fatigue failure and performance degradation are proposed. To develop the reliability evaluation technology of FBG sensor considering packaging and bonding process, the reliability evaluation rules of FBG sensor network are established. The research results can provide a reference for the bonding design of carbon fiber encapsulated FBG sensors, and provide a method for the reliability evaluation of carbon fiber encapsulated FBG sensors.