高精度矢量磁力仪地面测试定标系统大型磁屏蔽室仿真分析

李志宏; 王劲东; 吕尚; 万任新

doi:10.11728/cjss2023.05.2022-0067

高精度矢量磁力仪地面测试定标系统大型磁屏蔽室仿真分析

doi: 10.11728/cjss2023.05.2022-0067 cstr: 32142.14.cjss2023.05.2022-0067

1.
中国科学院国家空间科学中心　北京　100190
2.
中国科学院大学　北京　100049

基金项目: 国家重点研发计划项目资助（2020YFE0202100）

详细信息

作者简介:

李志宏　E-mail：lizhihong@nssc.ac.cn

王劲东　wjd@nssc.ac.cn

中图分类号: V524
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出版历程
- 收稿日期: 2022-11-13
- 录用日期: 2023-06-25
- 修回日期: 2023-06-20
- 网络出版日期: 2023-06-25

Simulation of Large-scale Magnetic Shielding Room for High-precision Vector Magnetometer Ground Test and Calibration System

1.
National Space Science Center, Chinese Academy of Sciences, Beijing 100190
2.
University of Chinese Academy of Sciences, Beijing 100049

摘要

摘要: 利用有限元分析方法开展大型磁屏蔽室的仿真分析，完成了高精度矢量磁力仪地面定标用大型磁屏蔽室的建模和性能仿真计算，从屏蔽效能、开口影响及内部磁场均匀度等方面对磁屏蔽室仿真计算和实测结果进行对比。结果表明，磁屏蔽空间内部中心区域的剩磁实测数值与仿真结果一致性较好，剩磁分布趋势基本一致，证明有限元分析方法在磁屏蔽室屏蔽性能定量分析的可行性。通过有限元分析方法，能够实现磁屏蔽室开口剩磁影响的定量计算，为磁屏蔽室门及通风孔设计提供依据；同时可以对内部磁场均匀区大小、残余梯度进行验证，有效避免工程实施后发现性能不满足设计要求的风险，有利于保障大空间磁屏蔽室的性能和建造效率。
- 矢量磁力仪 /
- 地面定标 /
- 磁屏蔽室 /
- 仿真计算
Abstract: In this paper, the simulation analysis of a large-scale magnetic shielding room is carried out by using the finite element analysis method, and the modeling and performance simulation calculation of a large-scale magnetic shielding room for ground calibration of a high-precision vector magnetometer are completed, and the simulation calculation and measured results of the magnetic shielding room are compared and analyzed from the aspects of shielding effectiveness, opening influence, internal magnetic field uniformity and other aspects. The results show that the measured value of the remnant magnetism in the central area of the magnetic shielding space is in good agreement with the simulated results, and the remnant magnetism distribution trend is basically the same, which proves the feasibility of the finite element analysis method in the quantitative analysis of the shielding performance of the magnetic shielding room. The finite element analysis method can realize the quantitative calculation of the remnant magnetic influence of the shielding room opening, which provides a basis for the design of shielding room doors and ventilation holes, At the same time, the size of the uniform area of the internal magnetic field and the residual gradient can be verified, which effectively avoids the risk of finding the performance does not meet the requirements after the implementation of the project. Aiming at the design and research of large-space magnetic shielding room, the method based on finite element and ANSYS Maxwell software simulation adopted in this paper is conducive to guarantee the performance and construction efficiency of the large-space magnetic shielding room.
- Vector magnetometer /
- Ground calibration /
- Magnetic shielding room /
- Simulation

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图 1 磁屏蔽条件下的磁旁路

Figure 1. Magnetic bypass on the condition of magnetic shielding

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图 2 磁屏蔽室仿真网格设定

Figure 2. Grid setting for magnetic shielding room

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图 3 磁屏蔽室磁场分布 (箭头方向表示外部地磁场方向，颜色代表强度数值)。（a）磁屏蔽室外磁场分布，（b）屏蔽室内部及外部磁场分布（屏蔽室隐藏显示）,（c）屏蔽室垂直于z轴的平面磁场分布,（d）屏蔽室垂直于x轴的平面磁场分布

Figure 3. Magnetic shielding room magnetic field distribution (The direction of the arrow indicates the direction of the external geomagnetic field, and the color represents the intensity value). (a) Distribution of external magnetic field of the magnetic shielding room. (b) Distribution of both external and internal magnetic field of the magnetic shielding room (shielding room hidden display). (c) Magnetic field distribution in the plane of the shielded room perpendicular to the z-axis. (d) Magnetic field distribution in the plane of the shielded room perpendicular to the x-axis

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图 4 磁屏蔽室工作区 (2 m×2 m×2 m) 剩余磁场测试点分布

Figure 4. Distribution of test points from residual magnetic field in the working area (2 m×2 m×2 m) of the magnetic shielding room

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图 5 屏蔽室内部x轴向三段截面剩余磁场仿真数值分布

Figure 5. Simulation of the residual magnetic field distribution of the x axis three-section inside the shielding room

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图 6 磁屏蔽室开口处剩余磁场强度分布

Figure 6. Distribution of residual magnetic field intensity at the opening of the magnetic shielding room

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图 7 磁屏蔽室剩余磁场标量仿真数值分布

Figure 7. Numerical distribution diagram of scalar simulation of residual magnetic field in magnetic shielding room

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图 8 磁屏蔽室剩余磁场标量实测数值分布

Figure 8. Distribution of measured value of scalar residual magnetic field in magnetic shielding room

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图 9 磁场强度总值对比

Figure 9. Comparison of total magnetic field intensity

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图 10 大空间磁屏蔽室内部实物

Figure 10. Internal physical picture of large space magnetic shielding room

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表 1 主要大型磁屏蔽室情况对比

Table 1. Comparison of major large space magnetic shielding rooms

序号	名称	屏蔽材料及构成	结构尺寸
1	美国伊利诺大学零磁屏蔽室MSR	1层4.8 mm的铝和2层1.5 mm的坡莫合金共同构成	内部空间为2.23 m×2.23 m× 2.23 m
2	美国麻省理工大学零磁屏蔽室	由2层纯铝和3层高磁导率材料薄板构成	26面类球体，最内层直径2.5 m，最外层直径4 m
3	韩国标准计量与科学研究院零磁室	－	内部尺寸：2 m×2 m×2.5 m
4	德国国家物理技术研究院PTB零磁屏蔽室（BMSR-2）	由1层射频屏蔽、1层铝和7层坡莫合金以及主动补偿线圈共同构成	内部尺寸：2.9 m×2.9 m×2.9 m 建筑尺寸：15 m×15 m×15 m
5	哈佛大学联合生物医学中心MSR	共3层，每层均由高导磁和高电导材料构成	内部尺寸：4.0 m ×3.0 m×2.4 m 外部尺寸：5.3 m ×4.3 m×4.1 m
6	日本超导实验室COSMOS	由1层铝和4层高导磁材料共同构成	外形似足球，内层直径约4 m，外层直径约6.1 m
7	中国地震局与钢铁研究院联合建造的零磁空间实验室	采用高导磁率的坡莫合金构成	外形为类球体，内部直径约2 m

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表 2 对应图5（a）剩磁强度仿真数值

Table 2. Simulation value of residual magnetic field in Figure 5(a)

Name	x	y	z	B (×10^–2) /μT
m₁	0.000	–1000.000	1000.000	9.378
m₂	0.000	0.000	1000.000	7.847
m₃	0.000	1000.000	1000.000	7.266
m₄	0.000	–1000.000	0.000	9.543
m₅	0.000	0.000	0.000	7.794
m₆	0.000	1000.000	0.000	7.004
m₇	0.000	–1000.000	–1000.000	9.107
m₈	0.000	000.000	–1000.000	6.806
m₉	0.000	1000.000	–1000.000	6.027
注　B 为剩余磁场标量仿真值。

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表 3 对应图5（b）剩磁强度仿真数值

Table 3. Simulation value of residual magnetic field in Figure 5(b)

Name	x	y	z	B (×10^–2) /μT
m₁	1000.000	–1000.000	1000.000	9.356
m₂	1000.000	0.000	1000.000	7.916
m₃	1000.000	1000.000	1000.000	7.247
m₄	1000.000	–1000.000	0.000	9.431
m₅	1000.000	0.000	0.000	7.766
m₆	1000.000	1000.000	0.000	6.911
m₇	1000.000	–1000.000	–1000.000	9.120
m₈	1000.000	000.000	–1000.000	7.087
m₉	1000.000	1000.000	–1000.000	5.997
注　B 为剩余磁场标量仿真值。

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表 4 对应图5（c）剩磁强度仿真数值

Table 4. Simulation value of residual magnetic field in Figure 5(c)

Name	x	y	z	B (×10^–2) /μT
m₁	–1000.000	–1000.000	1000.000	9.338
m₂	–1000.000	0.000	1000.000	7.930
m₃	–1000.000	1000.000	1000.000	7.087
m₄	–1000.000	–1000.000	0.000	9.407
m₅	–1000.000	0.000	0.000	7.758
m₆	–1000.000	1000.000	0.000	6.871
m₇	–1000.000	–1000.000	–1000.000	8.986
m₈	–1000.000	000.000	–1000.000	7.140
m₉	–1000.000	1000.000	–1000.000	5.975
注　B 为剩余磁场标量仿真值。

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表 5 磁屏蔽室剩余磁场标量强度仿真数值与实际测试数值情况及对比（单位nT）

Table 5. Comparison of simulation and measured data of residual magnetic field scalar intensity in magnetic shielding room （Unit nT）

高度	测试点序号及状态	1			2			3
高度	测试点序号及状态	仿真	实测	差值	仿真	实测	差值	仿真	实测	差值
屏蔽室工作中心高度	A	68.71	160.8	92.09	77.58	129.0	51.42	94.07	98.1	4.03
	B	70.04	177.8	107.76	77.94	118.8	40.86	95.43	112.8	17.37
	C	69.11	169.9	100.79	77.66	149.9	72.24	94.31	136.3	41.99
屏蔽室工作中心高度以下1 m	A	59.75	150.1	90.35	71.40	131.5	60.10	89.86	77.0	–12.86
	B	60.27	163.8	103.53	68.06	104.9	36.84	91.07	76.5	–14.57
	C	59.97	158.4	98.43	70.87	133.0	62.13	97.20	101.1	9.90
屏蔽室工作中心高度以上1 m	A	70.87	171.6	100.73	79.30	151.6	72.30	93.38	127.5	34.12
	B	72.66	177.2	104.54	78.47	159.0	80.53	93.78	145.4	51.62
	C	72.47	178.4	105.93	79.16	170.4	91.24	93.56	165.4	71.84
注　表中点位剩磁测量值实测为矢量数值，为与仿真值有效比对，换算成标量值。

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