摘要
阵列涡流传感器线圈间互感干扰中包含缺陷的有效信息,基于传感器动态检测的复杂情况,利用ANSYS软件建立了三维场-路耦合有限元模型并从互感中提取表面裂纹的定量化信息,从理论上分析了双线圈检测模式下检测方向、裂纹长度和深度变化对检测线圈感应电压幅值的影响,采用微分处理方法对数据进行处理进而对裂纹进行了定量分析。仿真结果表明,检测方向、裂纹长度和深度变化可显著影响检测感应电压幅值,微分处理可从互感中提取表面裂纹的定量化信息。
The effective information of defects is included in coils mutual inductance of array eddy current sensor.Based on the complex conditions of sensor dynamic detection,the 3Dfield-circuit coupled finite element models are established with ANSYS software and the quantitative information of surface crack is extracted from coils mutual inductance.The influences of induced voltage amplitude of detecting coil caused by variation of detecting direction,crack length and depth under double coils detection model are studied on paper.Data are processed by differential method for quantitative analysis of crack.The simulation results show that the variation of detecting direction,crack length and depth can significantly influence induced voltage amplitude of detecting coil and the quantitative information of surface crack can be extracted from coils mutual inductance by means of the differential method.
出处
《无损检测》
2015年第2期29-33,共5页
Nondestructive Testing
基金
国家自然科学基金资助项目(51205340)
关键词
阵列涡流
裂纹检测
有限元
线圈互感
Array eddy current
Crack detection
Finite element
Coils mutual inductance
