An EMPECT-based defect localization method for multilayered structures using high-order statistical analysis and high-frequency component separation strategy

IF 4.1 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Ndt & E International Pub Date : 2025-03-22 DOI:10.1016/j.ndteint.2025.103394

Shuyan Yang , Jizhou Zhang , Siwei Fan , Guohang Lu , Shunping Yan , Zhigeng Fan , Qiang Wan , Shuxin Zhang , Lifeng Li , Zhenmao Chen , Shejuan Xie

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Abstract

The multilayered metallic structures are widely used in industrial fields. For these structures, the internal corrosion defects happening in the process of manufacture and service may seriously affect the availability and safety of the structure and even the whole equipment. In this study, to achieve the effective detection and localization of the internal corrosion defects distributed in different layers, based on energy-management pulsed eddy current testing method, a novel high-order signal feature and a new defect localization method on the basis of high-frequency component separation are proposed. The superiority of the novel high-order signal feature is verified through numerical simulation and experiments. Compared with traditional signal feature, the novel high-order signal feature is able to detect smaller-sized defects and has higher signal-to-noise ratio. The validation of the new defect localization method is proved by experiments. The macro accuracy of the proposed localization method is 91.67 % and this method is still effective for the defect with stepped depth.

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基于高阶统计分析和高频成分分离策略的多层结构缺陷定位方法

多层金属结构在工业领域有着广泛的应用。对于这些结构，在制造和使用过程中发生的内部腐蚀缺陷可能会严重影响结构乃至整个设备的可用性和安全性。为了实现对分布在不同层的内部腐蚀缺陷的有效检测和定位，本研究基于能量管理脉冲涡流检测方法，提出了一种新的高阶信号特征和基于高频成分分离的缺陷定位新方法。通过数值模拟和实验验证了该高阶信号特征的优越性。与传统的信号特征相比，新的高阶信号特征能够检测到更小尺寸的缺陷，并且具有更高的信噪比。通过实验验证了新缺陷定位方法的有效性。所提出的定位方法的宏观精度为91.67%，对于台阶深度的缺陷仍然有效。

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来源期刊

Ndt & E International 工程技术-材料科学：表征与测试

CiteScore

7.20

自引率

9.50%

发文量

121

审稿时长

55 days

期刊介绍： NDT&E international publishes peer-reviewed results of original research and development in all categories of the fields of nondestructive testing and evaluation including ultrasonics, electromagnetics, radiography, optical and thermal methods. In addition to traditional NDE topics, the emerging technology area of inspection of civil structures and materials is also emphasized. The journal publishes original papers on research and development of new inspection techniques and methods, as well as on novel and innovative applications of established methods. Papers on NDE sensors and their applications both for inspection and process control, as well as papers describing novel NDE systems for structural health monitoring and their performance in industrial settings are also considered. Other regular features include international news, new equipment and a calendar of forthcoming worldwide meetings. This journal is listed in Current Contents.