Affiliations: [a] Air Force Engineering University, Xi’an, Shaanxi, China | [b] Xi’an Jiaotong University, Xi’an, Shaanxi, China
Correspondence:
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Corresponding author: Qiuping Hu, Air Force Engineering University, Xi’an, Shaanxi 710051, China. E-mail: 13032902759@163.com
Abstract: The detection for internal defects of the practical aviation carbon fiber reinforced polymer (CFRP) using different modes of laser was discussed in this paper. The results show that the effect of the laser with long pulsed wave heating mode is the best, and then sawtooth wave mode is followed by sine wave mode. Besides, the valid image processing method plays a significant role in improving the effect of differential laser infrared thermography. Compared with the detection results of thermal lamp thermography, the effect of differential laser thermography is better. There are two main advantages of using a planar laser to heat the aviation carbon fiber composites: (1) the detection speed is so fast, which only takes a few seconds to complete the whole detection process; (2) laser method is more flexible than thermal lamp thermography because of the range detected can be adjusted according to the aim of experiments.
Keywords: Different modes of laser, internal defects, differential processing, planar laser
