梯度场麦克斯韦线圈磁场及磁场梯度分析  

Analysis on magnetic field and its gradient of the gradient field Maxwell coil

作　　者：孙晓洁 丁昊[1,2,3] 董鹏 SUN Xiao-jie;DING Hao;DONG Peng(Laboratory of Science and Technology on Ultra-precision Aerospace Control Instrument,China Aerospace Science and Technology Corporation,Beijing 100094,China;Quantum Engineering Research Center,China Aerospace Science and Technology Corporation,Beijing 100094,China;Beijing Institute of Aerospace Control Devices,Beijing 100094,China)

机构地区：[1]中国航天科技集团有限公司超精密航天控制仪器技术实验室,北京100094 [2]中国航天科技集团有限公司量子工程研究中心,北京100094 [3]北京航天控制仪器研究所,北京100094

出　　处：《磁性材料及器件》2020年第2期16-19,共4页Journal of Magnetic Materials and Devices

基　　金：国防科技基金资助项目(0343007)。

摘　　要：在地质勘探、军事导航、医学诊断、目标磁异探测等领域迫切需要研制高精度的磁场梯度测量装置。设计了一种梯度场麦克斯韦线圈,用于对高精度磁场梯度仪进行标校。运用毕奥-萨伐儿定律,首先推导出梯度场麦克斯韦线圈在中心处磁场各分量的分布,然后通过数值仿真绘制出该线圈的磁场强度分布、磁场梯度分布及等值线图。结果表明,在相同的线圈匝数、激励电流和线圈半径条件下,梯度场麦克斯韦线圈产生的磁场梯度均匀区域达到0.602 m2,比反亥姆霍兹线圈产生的磁场梯度均匀区域大15倍,且产生磁场梯度的均匀性也优于反亥姆霍兹线圈。There is an urgent need to develop the high-precision magnetic gradient instrument in the field of geological survey,military navigation,medical diagnosis and magnetic anomaly detection.In this paper,a gradient field Maxwell coil is designed to calibrate the magnetic gradient instrument.Firstly,the distribution model of the magnetic field of gradient field Maxwell coil is derived by using the Biot-Savart’s Law.Then the distribution maps of the magnetic field intensity,the magnetic field gradient and the contour are drawn by the numerical simulation.The results show that the uniform region of the magnetic gradient produced by the gradient field Maxwell coil is 0.602 m2,15 times that of the anti-Helmholtz coil,and the uniformity of magnetic gradient produced by the gradient field Maxwell coil is also better than that of the anti-Helmholtz coil.

关 键 词：梯度场麦克斯韦线圈 反亥姆霍兹线圈 磁场 磁场梯度 

分 类 号：TM142[电气工程—电工理论与新技术]