摘要
为测量铁磁性材料表面淬火硬化层厚度 ,把半无限大媒质分为三层区域 ,分析磁导率随深度连续变化的铁磁性媒质的涡流问题 ,通过求解矢量磁位的边值问题得到了矢量磁位的解析解 ,进而导出了媒质上方放置式空心圆柱线圈的阻抗增量解析式 。
In order to measure the hardening thickness of a quenched material, three layered medium structure was taken and the eddy current problem of ferromagnetic medium was analyzed. By solving the boundary value problem of magnetic vector potential, analytical expression to impedance increment of the solenoid coil in eddy current testing of the medium with depth varying permeability in half space was given. Theoretical result was proved by experiments.
出处
《无损检测》
2002年第8期323-327,共5页
Nondestructive Testing
基金
国家自然科学基金资助项目 (5 99770 2 2 )
关键词
半无限大媒质
涡流检测
磁导率
解析式
阻抗
Eddy current testing
Permeability
Analytical expression
Impedance
