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远东无损检测新技术论坛论文精选
2024
2024 远东无损检测新技术论坛论文精选
DOI:10.11973/wsjc240412
对置阵列多模态全聚焦焊缝检测技术分析
杨贵德,詹红庆,孙伟成,林丹源,杜南开,陈振光
(广东汕头超声电子股份有限公司超声仪器分公司,汕头 515041)
摘 要:近几年,多模态全聚焦焊缝检测技术逐渐发展成为超声无损检测领域中的一项新兴研
究热点,但该项技术的实际应用研究还相对滞后,例如对于如何选择模态实现焊缝缺陷真实形态的
有效重建以及采用何种方法实现多模态图像中缺陷影像的准确定量分析,截至目前仍然没有比较
清晰的指导方法。针对上述问题,提出了一种基于对置阵列全矩阵采集的多模态全聚焦焊缝检测
方法,该方法能够充分采集被检测焊缝的结构信息和内部埋藏缺陷的方向信息,有效重构焊缝轮廓
结构以及内部埋藏缺陷的真实形态,降低缺陷定性难度,准确呈现焊缝内部埋藏缺陷的尖端衍射信
号,提高缺陷定量精度。
关键词:对置阵列;全矩阵;多模态全聚焦方法;模态组合;模态分解
中图分类号:TG115.28 文献标志码:A 文章编号:1000-6656(2024)11-0012-08
Analysis of the weld detection using multimodal total focusing method with opposite array
YANG Guide, ZHAN Hongqing, SUN Weicheng, LIN Danyuan, DU Nankai, CHEN Zhenguang
(Guangdong Goworld Co., Ltd. Ultrasonic Instrument Branch, Shantou 515041, China)
Abstract: In recent years, weld detection using multimodal total focusing method has gradually developed into
an emerging research hotspot in the field of ultrasonic nondestructive testing, but the practical application research of
this technology is still relatively lagging behind, for example, there is still no clear guidance on how to select modes
to effectively reconstruct the true shape of weld defects and what methods can be used to achieve accurate quantitative
analysis of defect images in multimodal images. In response to the above problems, this paper proposed a weld detection
method using multimodal total focusing method with opposite array. The proposed full matrix capture method from the
opposed array can fully collect the structural information of the tested weld and the directional information of internal buried
defects inside the weld; The proposed modal combination method can effectively reconstruct the contour structure of the
weld and the true shape of internal buried defects, reducing the difficulty of defect characterization; The proposed modal
decomposition method can present the tip diffraction signals of buried defects inside the weld, improving the accuracy of
defect quantification.
Key words: opposite array; full matrix capture; multimodal total focusing method; modal combination; modal
decomposition
TOFD(超声衍射时差法)超声成像检测技术基 是纵波检测,难以有效利用二次波而无法实现焊缝
于焊缝内部裂纹尖端的超声衍射信号进行测量,能 的百分百覆盖检测,存在漏检风险。
够实现焊缝裂纹缺陷的精准定量测量,但其近表面 当前,在国内外焊缝超声无损检测领域,相控阵
存在盲区,对该区域检测可靠性不够,且由于使用的 超声成像检测技术是一种非常重要的检测手段,其
主要优势是成像检测覆盖范围大、检测效率高,并
可以实现连续记录存储。但该技术的本质仍是基于
收稿日期:2024-08-27
传统的脉冲回波反射法,故其成像结果的图像化表
作者简介:杨贵德(1979—),男,高级工程师,主要研究方向为工
征能力不足,无法有效重构焊缝轮廓坡口的真实结
业无损检测仪器系统研发
通信作者:杨贵德,gdyang@st-ndt.com。 构,且焊缝内部埋藏缺陷真实形态的图像化重建结
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2024 年 第 46 卷 第 11 期
无损检测

