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以受到冲击损伤的军械航空复合材料试件在超声红外热像无损检测实验下一组时间序列热图为对象,研究了图像特点及渐变过程。针对军械航空复合材料的复杂结构、缺陷特点以及图像的实际特征,在经过图像降噪预处理之后,采用图像融合的方法实现时间域的缺陷拼接,继而通过分析缺陷的热扩散特点判断缺陷的空间域可拼接性并进行拼接,解决了军械航空复合材料上的缺陷在红外热图中不连贯的问题。从定量分析的缺陷长、宽精度来看,所采用的缺陷拼接方法在针对冲击损伤的复合材料试件缺陷分析中有效。
A series of ordnance aviation composite material specimens subjected to impact damage were subjected to a series of time-series heat maps under the ultrasonic infrared thermography non-destructive testing. The characteristics of the image and the gradual change process were studied. According to the complex structure, defect characteristics and the actual characteristics of the image, the image fusion method was used to realize the time domain defect stitching after the image noise reduction preprocessing, and then the defect space was judged by analyzing the thermal diffusion characteristics of the defect Domain splicing and splicing, to solve the defects in the ordnance aviation composite materials in the infrared heat map in the problem of inconsistency. From the perspective of quantitative analysis of long and wide defects, the defect stitching method is effective in the defect analysis of composite specimens for impact damage.