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核磁共振陀螺高精度磁场驱动技术

陆麒麟 杨丹 赵兴华 周斌权

陆麒麟, 杨丹, 赵兴华, 等 . 核磁共振陀螺高精度磁场驱动技术[J]. 北京航空航天大学学报, 2018, 44(12): 2595-2604. doi: 10.13700/j.bh.1001-5965.2018.0137
引用本文: 陆麒麟, 杨丹, 赵兴华, 等 . 核磁共振陀螺高精度磁场驱动技术[J]. 北京航空航天大学学报, 2018, 44(12): 2595-2604. doi: 10.13700/j.bh.1001-5965.2018.0137
LU Qilin, YANG Dan, ZHAO Xinghua, et al. Nuclear magnetic resonance gyroscope high-precision magnetic field drive technology[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(12): 2595-2604. doi: 10.13700/j.bh.1001-5965.2018.0137(in Chinese)
Citation: LU Qilin, YANG Dan, ZHAO Xinghua, et al. Nuclear magnetic resonance gyroscope high-precision magnetic field drive technology[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(12): 2595-2604. doi: 10.13700/j.bh.1001-5965.2018.0137(in Chinese)

核磁共振陀螺高精度磁场驱动技术

doi: 10.13700/j.bh.1001-5965.2018.0137
基金项目: 

国家自然科学基金 61627806

国家"863"计划 2014AA123401

详细信息
    作者简介:

    陆麒麟  男, 硕士研究生。主要研究方向:量子传感技术

    周斌权  男, 博士, 讲师。主要研究方向:原子陀螺仪技术

    通讯作者:

    周斌权, E-mail: bqzhou@buaa.edu.cn

  • 中图分类号: TM93;TL62+2

Nuclear magnetic resonance gyroscope high-precision magnetic field drive technology

Funds: 

National Natural Science Foundation of China 61627806

National High-tech Research and Development Program of China 2014AA123401

More Information
  • 摘要:

    核磁共振陀螺(NMRG)是利用激光与核磁共振气室中的碱金属原子和惰性气体原子的相互作用使核子以拉莫尔频率进动,并通过磁场驱动技术对气室磁场实现闭环控制和对剩磁进行补偿来维持核子的共振状态,进而能够检测载体的角速度信息。磁场驱动技术作为磁场闭环控制的重要部分,直接影响核磁共振陀螺的磁场控制精度和稳定性。为了解决核磁共振陀螺磁场控制精度和稳定性不足的关键问题,采用交直流分离设计的压控电流源方案改善磁场驱动问题,基于噪声分析理论对电路进行建模和噪声分析,并通过实验验证对三轴线圈的横向磁场控制精度达±0.046 2 nT,纵向磁场控制精度为±0.003 1 nT,实验证明该技术方案具有较强的工程应用价值。

     

  • 图 1  磁场驱动电路结构框图

    Figure 1.  Structure diagram of magnetic field drive circuit

    图 2  数字控制装置原理框图

    Figure 2.  Principle diagram of digital control device

    图 3  直流压控电流源模型

    Figure 3.  Model of DC voltage-controlled current source

    图 4  交流V-I转换模型

    Figure 4.  Model of AC V-I transformation

    图 5  低噪声电源电路

    Figure 5.  Low noise power supply circuit

    图 6  直流压控电流源噪声模型

    Figure 6.  Noise model of DC voltage-controlled current source

    图 7  直流等效输出电流噪声功率谱

    Figure 7.  Current noise power spectrum of DC equivalent output

    图 8  直流输入输出特性曲线

    Figure 8.  DC input-output characteristic curve

    图 9  磁场驱动控制器实验电路

    Figure 9.  Experimental circuit of magnetic field drive controller

    图 10  三轴柔性线圈

    Figure 10.  Triaxial flexible coil

    图 11  直流电流漂移测试图

    Figure 11.  DC current drift test

    图 12  交直流负载输出曲线

    Figure 12.  Load output curves of AC & DC

    图 13  交流输出幅频特性曲线

    Figure 13.  AC output amplitude-frequency characteristic curves

    图 14  等效输出电流噪声

    Figure 14.  Equivalent output current noise

    表  1  直流电流输出分辨力

    Table  1.   DC current output resolution

    直流幅值控制字正直流电流/mA负直流电流/mA
    00000.001 8160.001 992
    00010.002 7080.001 506
    00020.003 4640.000 856
    00030.004 2560.000 194
    00040.005 038-0.000 434
    00050.005 828-0.001 092
    00060.006 574-0.001 746
    00070.007 346-0.002 424
    00080.008 094-0.003 064
    00090.008 862-0.003 722
    000A0.009 624-0.004 378
    000B0.010 404-0.005 028
    000C0.011 168-0.005 674
    000D0.011 930-0.006 328
    000E0.012 712-0.000 434
    000F0.013 464-0.001 092
    下载: 导出CSV

    表  2  直流电流输出精度

    Table  2.   DC current output accuracy

    理论电流/mA正实测电流/mA负实测电流/mA
    ±0.010.010 052-0.010 106
    ±0.020.019 991-0.020 234
    ±0.030.029 906-0.029 611
    ±33.000 17-2.999 57
    ±44.000 53-3.999 46
    ±55.000 28-4.999 97
    ±1616.002 7-15.999 8
    ±1717.002 2-16.999 3
    ±1818.002 1-17.999 4
    下载: 导出CSV

    表  3  主磁场精调直流电流输出精度

    Table  3.   Accurately DC current output accuracy of main magnetic field

    理论电流/mA(精调)实测电流/mA
    0.0050.004 999 6
    0.0060.006 001 9
    0.0070.006 998 7
    0.0080.008 004 3
    0.010.010 005 6
    0.020.020 003 7
    0.030.029 997 9
    0.040.040 003 2
    0.050.050 008 7
    下载: 导出CSV

    表  4  三轴线圈磁场控制精度

    Table  4.   Accuracy of magnetic field control of three-axis coil

    线圈
    线圈常数/
    (nT·mA-1)
    电流精度/
    mA
    磁场精度/
    nT
    x30.822 91±0.001 5±0.046 2
    y30.822 91±0.001 5±0.046 2
    z1 187.647 55±0.002 6×10-3±0.003 1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-03-16
  • 录用日期:  2018-06-15
  • 网络出版日期:  2018-12-20

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