基于分形理论的平面线圈激励涡流传感器  

A Planar Eddy Current Probe Based on Fractal Geometry

作　　者：陈国龙[1] 张卫民[1] 庞炜涵 秦峰[1] 果艳 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《北京理工大学学报》2017年第1期10-14,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(51275048)

摘　　要：提出并设计了一种基于分形理论自相似结构的科赫雪花图形激励装置的涡流传感器,利用COMSOL多物理场仿真软件进行了计算分析,在此基础上搭建实验平台并进行了实验验证.结果表明,与采用经典的圆形线圈激励方式相比,以科赫雪花图形为激励装置的涡流传感器,能有效提高局部涡流能量密度,改善涡流分布形态,从而提高对微小裂纹缺陷检测的灵敏度.实验表明所研制的新型平面结构涡流传感器,可以制作用于柔性阵列传感器,并能为结构健康监测中提供监测数据.A Koch geometry curve exciting eddy current probe was proposed based on fractal geometry and self-similar structure equipment.The FEMs were simulated with COMSOL multiphysics software.And an experiment platform was built to validate the eddy current probe.Compared with the circular exciting coils,the Koch geometry curve exciting eddy current probe can induce higher partial eddy current density in conductor and improve the distribution pattern of eddy current so as to improve the sensitivity of eddy current probe for small defect.Experiments validate that,the planar Koch curve exciting eddy current probe is useful in flexibility eddy current probe and can supply detection data for the system SHM.

关 键 词：分形几何 科赫图形 涡流传感器 裂纹检测 

分 类 号：TG115.28[金属学及工艺—物理冶金]