东南大学学报（英文版）2019，Vol.35Issue(1)：16-21,6.DOI:10.3969/j.issn.1003-7985.2019.01.003
用于激励匀强磁场的方形Helmholtz线圈设计与实现
Design and implementation of square Helmholtz coil for uniform magnetic field generation
摘要
Abstract
In order to calibrate electrical instruments and generate a constant magnetic field, a novel design method for square Helmholtz coil is proposed. According to the superposition principle in electromagnetics, the theory of the square Helmholtz coil is established, and the design method is verified by Matlab calculation. Compared with conventional circular Helmholtz coil, the novel square one is with a larger uniform region. Simulation work is conducted in Maxwell, and the distribution of the magnetic field is obtained. The results demonstrate the validation of the applied calculation method of the proposed Helmholtz model. The space utilization rate η is used to make a comparison between the square and circular coils for the uniform region. The square Helmholtz coil is fabricated, the length of a single square coil is 1.5 m, and the amplitude of the magnetic field is controlled by the current. The GSM-19 T proton magnetometer is used to measure the amplitude of the magnetic field generated by the square Helmholtz coil. Experimental results indicate that a wide-range variable uniform magnetic field from 0 to 120 μT is generated in the center of Helmholtz coils.关键词
质子磁力仪/方形Helmholtz线圈/空间利用率/匀强磁场Key words
proton magnetometer/square Helmholtz coils/space utilization rate/uniform magnetic field分类
信息技术与安全科学引用本文复制引用
王超,袁斌,毛军发,张爽..用于激励匀强磁场的方形Helmholtz线圈设计与实现[J].东南大学学报（英文版）,2019,35(1):16-21,6.基金项目
The National Natural Science Foundation of China (No.61327803) （No.61327803）
