双层球形线圈:一种新的自屏蔽均匀场线圈设计方法

IF 5.9 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Yiding Wang;Shengxin Lin;Chongyu Jin;Donghua Pan;Yitao Chen;Yuxiao Zhang;Liyi Li
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引用次数: 0

摘要

光泵磁强计(OPMs)由于其低成本、高时空分辨率和优异的磁场灵敏度,已成为脑磁图和心磁图(MEG和MCG)的一种有前途的磁传感器。自屏蔽线圈-在快速衰减外场的同时产生高度均匀的内部场-在OPM开发中起着关键作用:作为磁屏蔽室(MSR)标准磁源,它们可以实现无畸变的均匀场,用于OPM校准;作为探头内调制磁源,它们提供稳定、低串扰的调制场。这些线圈的外场衰减和内场均匀性是关键的性能指标。为了克服传统圆柱形自屏蔽线圈拓扑结构固有的局限性,本文提出了一种双层球形自屏蔽线圈结构,并根据目标区域的场对其几何形状进行了优化。理论分析表明,与普通圆柱结构相比,本文提出的球形结构在作为调制源时将最小无串扰距离减少了50%,在作为标准源时将均匀场区域扩大了1.9倍。实验验证证实了这些预测,证明了球面线圈拓扑和优化方法在提高OPM性能和抑制串扰方面的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dual-Layer Spherical Coil: A Novel Design Method for Self-Shielded Uniform Field Coil
Optically pumped magnetometers (OPMs) have emerged as a promising magnetic sensor for magnetoencephalography and magnetocardiography (MEG and MCG), owing to their low cost, high spatiotemporal resolution, and excellent magnetic-field sensitivity. Self-shielded coils—which generate a highly uniform internal field while rapidly decaying external fields—serve critical roles in OPM development: as in-magnetic shielding room (MSR) standard magnetic sources, they enable distortion-free uniform field for OPM calibration; as in-probe modulation magnetic sources, they provide stable, low-crosstalk modulation field. The external field decay and internal field uniformity of these coils are key performance metrics. To overcome the limitations inherent in conventional cylindrical self-shielded coil topologies, this article proposes a dual-layer spherical self-shielded coil structure and optimizes its geometry with respect to the field of the target region. Theoretical analysis shows that compared to common cylindrical designs, the proposed spherical structure reduces the minimum crosstalk-free distance by 50% when used as a modulation source, and expands the uniform field region by a factor of 1.9 when used as a standard source within MSR. Experimental validation corroborates these predictions, proving the efficacy of the spherical coil topology and optimization methodology in advancing OPM performance and suppressing crosstalk.
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来源期刊
IEEE Transactions on Instrumentation and Measurement
IEEE Transactions on Instrumentation and Measurement 工程技术-工程:电子与电气
CiteScore
9.00
自引率
23.20%
发文量
1294
审稿时长
3.9 months
期刊介绍: Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.
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