一种自调零平切型电涡流探头及其在碳纤维复合材料细观成像中的应用

doi:10.3901/JME.2021.04.027

机械工程学报 ›› 2021, Vol. 57 ›› Issue (4): 27-35.doi: 10.3901/JME.2021.04.027

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一种自调零平切型电涡流探头及其在碳纤维复合材料细观成像中的应用

程军^1,2,3, 徐帅³, 汪步云^1,2, 许德章^1,2, 杨继全³, 裘进浩⁴

1. 安徽工程大学机械工程学院芜湖 241000;
2. 安普机器人产业技术研究院有限公司芜湖 241007;
3. 南京师范大学电气与自动化工程学院南京 210023;
4. 南京航空航天大学机械结构力学及控制国家重点实验室南京 210016

收稿日期:2020-03-22 修回日期:2020-08-15 出版日期:2021-02-20 发布日期:2021-04-28
通讯作者: 程军(通信作者),男,1986年出生,博士,副教授,硕士研究生导师。主要研究方向为复合材料无损检测与先进制造。E-mail:chengjun@ahpu.edu.cn
基金资助:
国家自然科学基金（51605229）、国家重点实验室开放课题（MCMS-E-0519G03），教育部重点实验室开放课题（GDSC202011）、安徽省高校自然科学研究（KJ2018ZD014）、安徽工程大学创新团队、安徽省重点研发计划（202004a05020013）、安徽工程大学科技成果转化引导基金和远东无损检测新技术论坛创新人才支持计划资助项目。

Application of Self-nulling Pancake-tangent Eddy Current Probe for Mesoscopic Imaging of CFRP Composites

CHENG Jun^1,2,3, XU Shuai³, WANG Buyun^1,2, XU Dezhang^1,2, YANG Jiquan³, QIU Jinhao⁴

1. School of Mechanical Engineering, Anhui Polytechnic University, Wuhu 241000;
2. Ahpu Robot Industrial Technology Research Institute, Wuhu 241007;
3. School of Electric and Automation Engineering, Nanjing Normal University, Nanjing 210023;
4. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016

Received:2020-03-22 Revised:2020-08-15 Online:2021-02-20 Published:2021-04-28

摘要/Abstract

摘要： 针对碳纤维增强树脂基复合材料（Carbon fiber reinforced polymer，CFRP）弱导电性和异质多相结构特点，通过设计开发高分辨率涡流线圈探头结合空频域信号处理方法，实现对碳纤维复合材料板中10^-6～10^-3 m细观尺寸范围内的纤维分布以及纤维缺失、褶皱和空隙过大等缺陷的涡流成像。主要从线圈探头耦合特性建模仿真和图像特征参数提取两个方面对碳纤维复合材料的电涡流细观尺度成像技术进行研究，建立分离式线圈探头耦合阻抗信号模型和点扩散函数数学模型，综合考虑这两方面影响因素设计一种自调零涡流探头并确定了其结构参数。对多方向CFRP层合板进行了检测并研究了图像的特征参数提取方法，基于复平面相位旋转的方法确定每个扫描点的像素值，得到了清晰的纤维纹路分布和缺陷图像，进一步提高检测的分辨率。

关键词: 碳纤维复合材料, 涡流检测, 细观成像, 阻抗建模, 点扩散函数

Abstract: According to the weak conductivity of carbon fiber reinforced polymer(CFRP) composites and the structural characteristics of fiber/resin heterogeneous multiphase components，the eddy current imaging of fiber distributions and mesoscopic defects such as missing bundles，wrinkle and gaps within a microscopic size range of 1 micron to 1 mm in CFRP laminates is realized，by designing high resolution eddy current probe combined with spatial-frequency domain signal processing methods. The eddy current mesoscopic imaging technology is studied from the aspects of modeling and simulation of probe coupling characteristics and image feature extraction. The coupled impedance signal model of separated-coil probe and point spread function mathematical model are established. A self-nulling eddy current probe is designed and the structural parameters are determined by considering these two factors. Multi-directional CFRP laminates are detected and clear fiber texture and defect images are obtained. The image resolution is further improved by introducing novel feature parameter extraction method.

Key words: carbon fiber reinforced polymer, eddy current testing, mesoscopic imaging, impedance modeling, point spread function

中图分类号:

TM932

程军, 徐帅, 汪步云, 许德章, 杨继全, 裘进浩. 一种自调零平切型电涡流探头及其在碳纤维复合材料细观成像中的应用[J]. 机械工程学报, 2021, 57(4): 27-35.

CHENG Jun, XU Shuai, WANG Buyun, XU Dezhang, YANG Jiquan, QIU Jinhao. Application of Self-nulling Pancake-tangent Eddy Current Probe for Mesoscopic Imaging of CFRP Composites[J]. Journal of Mechanical Engineering, 2021, 57(4): 27-35.

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一种自调零平切型电涡流探头及其在碳纤维复合材料细观成像中的应用

Application of Self-nulling Pancake-tangent Eddy Current Probe for Mesoscopic Imaging of CFRP Composites

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