Laser infrared thermography detection for aviation carbon fibre composites

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Wang, Qiang^1 ; Qiuping, Hu^1 ; Ming, Liu^1 ; Liu, Yang^1 ; Xinyi, Li^1 ; Hongbin, Zhou^1

Equipment Management and UAV Engineering College, Air Force Engineering University, Xi'an

710051, China^1

关键词: Carbon fibre composites;    Defect-free surfaces;    Detection effect;    Detection process;    Internal defects;    Laser energy distribution;    Reference temperature;    Temperature information;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/3/032099/pdf
DOI  :  10.1088/1755-1315/267/3/032099

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Aviation safety is the focus of aviation field. In this paper, two different heating ways of modulated lasers were used to heat the aviation carbon fibre composites with internal defects. The results show that, after expanding, the unevenness of laser energy distribution has a great influence on the detection effect. In order to solve this problem, we obtained the reference temperature information by using the defect-free surface inside the specimen. After the difference between the obtained temperature information of the internal defect surface and the internal defect-free surface, the internal defect information of the specimen was successfully presented. At the same time, it is found that compared with the square wave heating, the effect of sine wave heating on detecting the internal defects of the specimen is more obvious. There are two main advantages of using laser infrared thermography to detect aviation carbon fibre composites: (1) the detection time is short, which only need a few seconds to complete the detection process; (2) the heating area can be adjusted by the distance between the specimen and the laser, which will make the detection more flexible.