一种圆鞍形磁屏蔽线圈的设计与性能研究

doi:10.3969/j.issn.1000-1158.2015.05.20

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摘要以毕奥-萨伐尔定律为基础,推导了一种圆鞍形线圈在空间任意点处的磁场分布表达式,优化了一种线圈结构,证明了圆鞍形线圈可以产生一定区域的稳恒磁场,并定量地给出了线圈内部磁场的空间分布情况。所设计线圈产生的磁场中,1%均匀度的磁场均匀区占轴上区域的28%,0.1%均匀度的磁场均匀区占轴上区域的10%;在1 mA的电流下,单圈线圈最大磁场补偿值为15 nT,相对偏差量不超过0.14 nT,验证了所推导表达式的正确性,为多维磁场补偿系统设计与研究提供了理论依据和参考。

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	赵伟霞
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	孙茂多
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	杨娅姣
	党玉杰

关键词 ：计量学, 稳恒磁场, 毕奥-萨伐尔定律, 圆鞍形线圈, 磁屏蔽

Abstract：The magnetic field distribution expression of one pair of round-saddle coils at any point in space is theoretically inferred based on the Biot-Savart Law, and the structure of the coils is optimized. The fact that the round-saddle coils can produce uniform magnetic field of a certain region is proved, and the partial magnetic field distribution of round-saddle coils is given quantitatively. The designed coils can produce uniform magnetic field of a certain area which is 28% of the axis area which the uniformity can be 1%, 10% of the axis area which the uniformity can be 0.1%. The maximum value of the magnetic field compensation of coils of one single round can be 15 nT in the current of 1 mA,and the relative deviation is less than 0.14 nT. Therefore the correctness of the magnetic field distribution expression is verified, providing the theoretical basis and reference for the design and research of the dimensional magnetic field compensation system.

Key words： metrology uniform magnetic field biot-savart law round-saddle coils magnetic shielding

基金资助:国家科技支撑计划（2006BAK03A24）;国家自然科学基金委重大科研仪器设备研制专项（61227902）

通讯作者: 董全林为本文通讯作者。dongquanlin@buaa.edu.cn

作者简介: 赵伟霞(1989－),女,河北临漳人,北京航空航天大学硕士研究生,研究方向为超显微仪器与电子光学技术。zhaoweixia@aspe.buaa.edu.cn

引用本文:

赵伟霞,董全林,孙茂多,丁莹,杨娅姣,党玉杰. 一种圆鞍形磁屏蔽线圈的设计与性能研究[J]. 计量学报, 2015, 36(5): 540-545.
ZHAO Wei-xia, DONG Quan-lin,SUN Mao-duo,DING Ying,YANG Ya-jiao,DANG Yu-jie. The Design and Research on Performance of Round-saddle Coils for Magnetic Shielding . Acta Metrologica Sinica, 2015, 36(5): 540-545.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2015.05.20 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2015/V36/I5/540