| 摘要: |
| 核磁共振陀螺代表了新一代高精度、微小型陀螺的发展方向之一,随着陀螺体积的降低,磁屏蔽层与磁场线圈随之减小,且二者贴合更加紧密,高导磁性的磁屏蔽层及低导磁性的空气介质交错分布,改变了线圈的磁通路径,导致线圈的磁场均匀性下降,制约了陀螺精度的提高。针对这一问题,提出了磁场等效增益系数,模拟磁屏蔽边界对线圈磁场的影响,据此建立了磁屏蔽边界条件下高均匀磁场线圈模型,优化了线圈参数。对所设计线圈的磁场均匀性进行了测试,表明该设计方法可以得到磁屏蔽边界条件下高均匀磁场线圈,可为发展微小型、高精度的核磁共振陀螺高均匀磁场线圈设计方法提供参考。 |
| 关键词: 核磁共振陀螺 磁场线圈 磁屏蔽边界 磁场均匀性 |
| DOI： |
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| Design Method of High Uniform Magnetic Coil for Nuclear Magnetic Resonance Gyroscope |
| WANG Chun-e,QIN Jie |
| (Beijing Institute of Automatic Control Equipment) |
| Abstract: |
| Nuclear Magnetic Resonance Gyroscope (NMRG) represents one of the developing trends of the next generation gyroscope with high precision and micro scale. With the decreasing in volume size of the NMRG, the sizes of internal magnetic shielding and the magnetic field coil also decrease, which not only requires high uniform magnetic field generated by small coil, but also requires the coil and the magnetic shielding layer adhered closely to reduce waste of space. Since the magnetic shielding boundary changes the flux path of the magnetic coil, the uniformity of the magnetic field decreases, which will constrain the control precision of the NMRG. To solve this problem, this paper proposes the concept of magnetic equivalent gain coefficient to simulate the influence of the magnetic shielding condition. Based on the concept, the optimization model is established and the coil parameters were optimized. Test of the uniformity of the designed magnetic coil shows that the design method is efficient and precise for gaining a high uniform magnetic coil under magnetic shielding condition, and can provide a significant design method reference for developing high performance NMRG in the near future |
| Key words: NMRG Magnetic coil Magnetic shielding boundary Magnetic uniformity |
