摘要
铁磁屏蔽体常用来屏蔽干扰磁场,内径一定情况下,屏蔽厚度越大,屏蔽效果越好,但造成感应磁场增大。弱磁场作用下,铁磁物体磁矩与外磁场成正比。以椭球体为例,计算了地磁场作用下,铁磁屏蔽体产生的磁矩,并分析了不同尺寸铁磁屏蔽体在测量点处的感应磁场变化规律。
Ferromagnet-shield is often used for shield interfere magnetic field, when inner diameter keep unchanged, shield effect is better but induced magnetic field outside increased as shield thickness increased. Magnetic-moment of ferromagnet is in direct proportion to the magnetic field in background. Taking ellipsoid for an example, the magnetic-moment of ferromagnet under magnetic field in background is calculated, and the variation law of induce magnetic field of ferromagnet with it＇s size changed is analyzed.
出处
《船电技术》
2014年第8期43-45,50,共4页
Marine Electric & Electronic Engineering
关键词
感应磁场
磁矩
正比
变化规律
inducted magnetic field
magnetic-moment
direct propotion
variation law
