缺陷的多模式全聚焦三维重构

Multi-mode total focus three-dimensional reconstruction of defects

分别采用超声相控阵扇扫、多模式全聚焦、多模式融合等3种成像方法,对焊缝夹渣缺陷进行了三维重构,并通过刻槽试块验证了多模式融合图像的真实性。结果表明,多模式融合成像法能够整合不同模式的有效信息,显示缺陷相对完整的立体轮廓,对焊缝缺陷的走向分析与类型识别有重要意义。

In this work, three imaging methods, such as ultrasonic phased array S-scan, multi-mode total focusing, and multi-mode fusion were used to reconstruct the slag inclusion defects in welds, and the authenticity of the multi-modal fusion image was verified by the notched test block. The results showed that the multi-mode fusion imaging could integrate the effective information of different modes and display the relatively complete three-dimensional contour of the defect, which was of great significance for the trend analysis and type identification of weld defects.