铝合金搭接焊缝数字射线成像典型缺陷参考图像库的建立
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摘要
对铝合金钨极氩弧焊搭接焊缝进行了X射线DR(数字射线)成像检测,得到了典型焊接缺陷的数字射线参考图像,定性分析了焊缝缺陷的图像特征。对典型缺陷的出现频数进行了统计分析,结果表明,手工钨极氩弧焊搭接焊缝的裂纹、气孔与夹杂缺陷的出现几率较高。对单个气孔、夹杂缺陷进行了分类。通过拉普拉斯锐化、浮雕特效和多尺度对比度增强方法对含裂纹的DR图像进行了缺陷增强显示,提高了人眼视觉效果。
X-ray DR(digital radiography)imaging is used to detect the lap joint of gas tungsten arc welding for aluminum alloy,the digital reference images of typical welding defects are obtained,and the characteristics of welding defect images are qualitatively analyzed.The statistical analysis of the occurrence frequency of the typical defects was performed and the results showed that the occurrence of cracks,pores and inclusions in TIG welding was high.The defect grades of individual pore or inclusion defect are classified.The crack defects of DR image are enhanced by Laplace sharpening,emboss effect and multi-scale contrast enhancement method,which improved the human visual effect.
X-ray DR(digital radiography)imaging is used to detect the lap joint of gas tungsten arc welding for aluminum alloy,the digital reference images of typical welding defects are obtained,and the characteristics of welding defect images are qualitatively analyzed.The statistical analysis of the occurrence frequency of the typical defects was performed and the results showed that the occurrence of cracks,pores and inclusions in TIG welding was high.The defect grades of individual pore or inclusion defect are classified.The crack defects of DR image are enhanced by Laplace sharpening,emboss effect and multi-scale contrast enhancement method,which improved the human visual effect.
引文
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[3]蒋中印,李泽亮,张永虎,等.管道焊缝数字射线DR检测技术研究[J].辽宁化工,2014,43(4):427-429.
[4]郑世才,王晓勇.数字射线检测技术[M].北京:机械工业出版社,2015.
[5]肖辉.焊接缺陷射线DR图像自动检测与识别系统研究[D].南昌:南昌航空大学,2016.
[6]丁无极,汪宏,熊伟东,等.管道环焊缝射线检测数字成像的畸变规律[J].无损检测,2016,38(4):38-40,66.
[7]敖波,邬冠华,邓翠贞,等.航空精密铸件射线CR成像检测研究[J].铸造,2011,60(9):884-887.