铝合金模拟腐蚀缺陷的红外热波无损检测

Image processing for detection of aluminum alloy with infrared thermographic NDT

本文通过对模拟铝合金材料腐蚀缺陷的红外热波无损检测实验,采用基于最小二乘法的去除拟合背景方法、脉冲相位法对实验结果进行处理,提高了缺陷的探测能力。并利用基于统计学的图像评估标准对处理效果作了定量评价。结果表明,红外热波检测技术可对缺陷作出快速有效直观的检测;去除拟合背景方法能有效的减少加热不均对缺陷识别的不利影响;脉冲相位法对空域的随机噪声有一定的抑制作用,并对在定位缺陷深度时有一定的识别能力。

To improve the detection capability of infrared thermographic non- destructive testing(IT NDT) for defects in aluminum alloy materials. Deleting fitted background and ulsed phase thermography (PPT) algorithms were proposed in this paper. Then statistical standard of image evaluation quantitatively evaluated the processing effects. It was shown that the technique was effective for rapid and intuitive of corrodent defects in materials; Deleting fitted background algorithm can effectively reduce the bad influe...