钢板对接焊缝漏磁检测可视化方法  

Visualization Method for the Steel Plate Butt Weld Based on Magnetic Flux Leakage Testing

作　　者：崔巍[1] 戴光[1] 龙飞飞[1] 王学增[2] 

机构地区：[1]东北石油大学机械科学与工程学院,大庆163318 [2]中国石油大庆石化分公司,大庆163000

出　　处：《无损检测》2013年第5期8-11,共4页Nondestructive Testing

基　　金：黑龙江省教育厅科学技术研究重点资助项目(2511008);黑龙江省研究生创新科研资助项目(YJSCX2012-048HLJ)

摘　　要：以钢板对接焊缝漏磁检测数据为基础,提出了一种基于伪彩色的焊缝漏磁检测的可视化方法。该方法首先利用新型漏磁检测系统(磁化方向与行进方向垂直)采集焊缝3种状态(焊缝无缺陷、焊道上分布矩形槽缺陷、热影响区分布矩形槽缺陷)的漏磁场信号,生成三维空间分布图;然后通过灰度级线性变换,将其转换为二维灰度图形;最后将生成的灰度图像经过灰度级-彩色变换方法转换成伪彩色图像。试验结果表明通过伪彩色图像可直观地显示焊缝缺陷特征信息;该方法丰富了漏磁图像的细节信息和层次感,增强了对缺陷特征的识别能力,具有较好的视觉效果。Based on the magnetic flux leakage （MFL） data of the butt weld of the steel plate, a MFL visualization method of the weld based on pseudo-color is proposed. Firstly, three kinds （weld with no-defect, rectangular slot defects in the heat affected zone, rectangular slot defects in the weld） of MFL signals are collected by the new MFI. system（magnetization direction is perpendicular to marching direction）, then three-dimensional spatial distribution are generated. And by the gradation linear transformation, it is converted to the two dimensional grayscale graphics. Afterwards, by the gradation color conversion method, the generated grayscale image is converted into the pseudo-color image. The test results indicate that the weld defect feature information can be displayed intuitively by the pseudo-color image; the method can enrich details and layering of the MFL image, and enhance the identification ability to the defect feature, with better visual effects.

关 键 词：钢板对接焊缝 漏磁检测 可视化 伪彩色 灰度图像 

分 类 号：TG115.28[金属学及工艺—物理冶金]