A Magnetic Compensation System Composed of Biplanar Coils Avoiding Coupling Effect of Magnetic Shielding

被引：46

作者：

Han, Bangcheng ^{[1
,2
,3
]}

Yang, Jianzhi ^{[2
,3
,4
]}

Zhang, Xu ^{[1
,2
,3
]}

Shi, Minxia ^{[1
,2
,3
]}

Yuan, Shuai ^{[2
,3
,4
]}

Wang, Ling ^{[2
,3
,4
]}

机构：

[1] Beihang Univ, Res Inst Frontier Sci, Beijing 100191, Peoples R China

[2] Beihang Univ, Hangzhou Innovat Inst, Hangzhou 310051, Peoples R China

[3] Beihang Univ, Ningbo Inst Technol, Ningbo 315800, Peoples R China

[4] Beihang Univ, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2023年 / 70卷 / 02期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Coils; Magnetic shielding; Magnetic resonance imaging; Magnetic noise; Current density; Superconducting magnets; Couplings; Biplanar coil; coupling effect; image method; magnetic shielding; target-field method (TFM); TARGET-FIELD METHOD; RESONANCE SHIM COILS; DESIGN; MAGNETOENCEPHALOGRAPHY;

D O I：

10.1109/TIE.2022.3159961

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Magnetic compensation coils are often used to improve the effectiveness of a magnetically shielded room (MSR), but a distortion of the field is caused by the shielding layer consisting of high-permeability material, which leads to a reduction in compensation capacity. To solve this problem, a new method is presented in this article based on a target-field method, an image method, and particle swarm optimization. By this way, a magnetic compensation system composed of biplanar coils is designed and fabricated to compensate the background field for a wearable magnetoencephalography device inside the MSR, and the coupling effect between the magnetic shielding material and the compensation field is effectively avoided. Experimental data show that these compensation coils produce uniform fields and field gradients with the inhomogeneity of less than 3.8%, consistent with the simulation results. In addition, this system realizes a real-time compensation to the residual field and field gradient in the MSR.

引用

页码：2057 / 2065

页数：9

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