Calibration of SQUID Magnetometers in Multichannel MCG System Based on Bi-Planar Coil

被引：35

作者：

Yang, Kang ^{[1
,2
]}

Wu, Dan ^{[3
]}

Gao, Wengen ^{[1
,2
]}

Ni, Tianming ^{[1
,2
]}

Zhang, Qiannian ^{[1
,2
]}

Zhang, Hongwei ^{[1
,2
]}

Huang, Dengchao ^{[1
,2
]}

机构：

[1] Anhui Polytech Univ, Coll Elect Engn, Wuhu 241000, Peoples R China

[2] Anhui Polytech Univ, Key Lab Adv Percept & Intelligent Control Highend, Minist Educ, Wuhu 241000, Peoples R China

[3] ZJU Hangzhou Global Sci & Technol Innovat Ctr, Hangzhou 311215, Peoples R China

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2022年 / 71卷

基金：

中国国家自然科学基金;

关键词：

Calibration; Manganese; Magnetic fields; SQUIDs; Magnetic sensors; Superconducting magnets; SQUID magnetometers; Biplanar coil; calibration; magnetocardiography (MCG) system; superconducting quantum interference device (SQUID); Tesla; Volt coefficient; TARGET-FIELD METHOD; DESIGN;

D O I：

10.1109/TIM.2022.3150588

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In a practical multichannel magnetocardiography (MCG) system based on superconducting quantum interference device (SQUID) magnetometers, the Tesla/Volt coefficient must be precisely calibrated for accurate analysis of heart diseases. In this article, we utilize the biplanar coil to calibrate the SQUID magnetometers in an MCG system for the first time. The coil design theory is discussed in detail, including the target-field theory and the Tikhonov regularization method. Also, the coil winding patterns can be obtained after discretization of the stream function, which is related to the current density. By defining the parameter of calibration uncertainty, the performance of the biplanar coil is analyzed and compared with a rectangular Helmholtz coil based on the COMSOL simulation method and experimental measurement. The measurement results are well in coincidence with the simulation ones, indicating that the biplanar coil has remarkable advantages over the Helmholtz coil. Also, Tesla/Volt coefficient calibrations of four SQUID magnetometers in an MCG system are conducted inside a magnetically shielded room (MSR) depending on these two coils. The final results show the superiority of the biplanar coil method in MCG system calibration.

引用

页数：9

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