Yang Caixia, Tan Yuegang, Liu Yi, Xia Ping, Cui Yinghao, Zheng Bo
School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China.
School of Mechatronics Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China.
Sensors (Basel). 2022 Mar 27;22(7):2569. doi: 10.3390/s22072569.
In order to overcome the shortcomings of the poor shear resistance of the bare optical fiber whose coating layer falls off due to harsh conditions, such as on aero-engines and the marine environment, the coaxial powder feeding laser cladding method (CPFLCM) is proposed to connect the optical fiber sensor and the substrate. The concentration field model of the powder flow is established in sections, the effective number model of particles and the corresponding laser attenuation rate are obtained. Through simulation, the influence of relevant parameters of laser cladding on the temperature field was analyzed, and the accurate parameters of laser cladding were optimized. Finally, the temperature rise trajectory of the substrate temperature field was verified by using the fiber grating temperature sensor. Through experiments, the quality of the molten pool and the optical transmission loss of the optical fiber sensor were analyzed, and the consistency of the simulation optimization parameters was verified. Through this paper, it can be concluded that the proposed CPFLCM can realize the effective connection of the optical fiber sensor to the substrate. It is of great significance in the application of optical fiber sensors in harsh environments of oceans and aerospace.
为了克服裸光纤因恶劣条件（如航空发动机和海洋环境）导致涂层脱落而抗剪强度差的缺点，提出了同轴送粉激光熔覆法（CPFLCM）来连接光纤传感器和基体。分段建立了粉末流的浓度场模型，得到了颗粒的有效数模型及相应的激光衰减率。通过模拟，分析了激光熔覆相关参数对温度场的影响，优化了激光熔覆的精确参数。最后，利用光纤光栅温度传感器验证了基体温度场的升温轨迹。通过实验，分析了熔池质量和光纤传感器的光传输损耗，验证了模拟优化参数的一致性。通过本文可以得出结论，所提出的CPFLCM能够实现光纤传感器与基体的有效连接。这在光纤传感器在海洋和航空航天等恶劣环境中的应用中具有重要意义。
