Geometry complex structure inspection using stretchable eddy current array sensors

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

Ndt & E International Pub Date : 2025-07-09 DOI:10.1016/j.ndteint.2025.103482

Lei Peng , Na Zhang , Xuhui Huang , Zi Li , Yiming Deng

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Abstract

Eddy-current testing (ECT) is widely used for the inspection and evaluation of structures made from conductive materials. In recent years, significant efforts have been made to improve the reliability and sensitivity of ECT sensors, including the development of state-of-the-art flexible eddy current sensor arrays based on polyimide substrates. These probes can adapt to uneven surfaces due to their flexibility. However, there are still situations where these probes fail. In this work, we propose a stretchable EC sensor array probe with a soft substrate material, designed to deform and conform to complex surfaces. A 3D simulation model was developed to study the effect of the probe's stretchability on defect detection. A prototype of the probe was fabricated and tested on various samples. Experimental results demonstrate that the proposed probe successfully inspected pit defect with 2 mm radius and 0.5 mm depth on a bent pipe with bending radius of 6 inches, where the flexible probe had previously failed.

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基于可拉伸涡流阵列传感器的几何复杂结构检测

涡流测试（ECT）广泛用于导电材料结构的检测和评价。近年来，人们在提高ECT传感器的可靠性和灵敏度方面做出了重大努力，包括开发基于聚酰亚胺衬底的最先进的柔性涡流传感器阵列。由于其灵活性，这些探头可以适应不平整的表面。然而，仍然存在这些探测失败的情况。在这项工作中，我们提出了一种可拉伸的EC传感器阵列探针，采用软基板材料，设计用于变形和适应复杂表面。建立了三维仿真模型，研究了探头拉伸性能对缺陷检测的影响。制作了探针的原型并在各种样品上进行了测试。实验结果表明，在弯曲半径为6英寸的弯曲管道上，柔性探头成功检测出半径为2mm、深度为0.5 mm的凹坑缺陷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.