西华大学学报（自然科学版）2026，Vol.45Issue(5)：17-28,12.DOI:10.12198/j.issn.1673-159X.5914
弱激励涡流热成像曲面检测磁芯激励器设计
Design of Magnetic Core Inductors for Weak-Excitation Eddy Current Thermography in Curved Surface Detection
摘要
Abstract
In eddy current thermography testing research,inductors predominantly employ high-fre-quency and high-current excitation methods to detect surface and subsurface defects in materials.The detec-tion objects are mostly flat,and the static heating area of the inductors is relatively small.However,equip-ment such as pipelines and storage tanks in the petrochemical industry mostly features curved surface struc-tures and operates in environments with stringent explosion-proof requirements,thus imposing strict limita-tions on excitation currents.Consequently,the detection efficiency and applicability of eddy current ther-mography technology are significantly limited under such scenarios.To this end,numerical simulation methods were adopted to carry out the structural design of a large-sized curved magnetic core inductor ap-plicable to weak-excitation conditions,and resolve the dependency on high currents and the compatibility between inductors and curved surface detection.A comparison of the heating performance of planar mag-netic core inductors demonstrates that the curved magnetic core structure maintains heating capacity and uniformity under a small curvature radius while avoiding mechanical interference.Based on the designed structural parameters,optimal heating solutions for different curvature radius ranges were obtained.A curved magnetic core inductor is suitable for curvature radii less than 1 m,a parallel arrangement of planar magnetic cores is applicable to radii between 1 m and 7 m,and a perpendicular arrangement of planar mag-netic cores is suitable for radii greater than 7 m.In weak-excitation conditions with the excitation current of 15 A and frequency of 50 Hz,relatively uniform heating is achieved on curved surfaces,which enhances detection safety.This study provides a reference for the application of eddy current thermography testing in high-risk environments such as petrochemical facilities.关键词
涡流热成像/弱激励/曲面检测/磁芯激励器/均匀加热Key words
eddy current thermography/weak-excitation/curved surface detection/magnetic core inductor/uniform heating分类
信息技术与安全科学引用本文复制引用
肖相陶,夏杰,唐松,孔春岩,李双双,张梁..弱激励涡流热成像曲面检测磁芯激励器设计[J].西华大学学报（自然科学版）,2026,45(5):17-28,12.基金项目
西华大学科研基金项目(Z231024) （Z231024）
石油天然气装备教育部重点实验室基金项目(OGE202303-18). （OGE202303-18）
