核磁共振陀螺横向补偿磁场优化设计  

Optimal Design of Lateral Compensation Field for Nuclear Magnetic Resonance Gyroscope

作　　者：明泽额尔顿 岳亚洲[1] 李攀[1] 雷兴[1] 张昊 MINGZE E’erdun;YUE Yazhou;LI Pan;LEI Xing;ZHANG Hao(Xi’an Flight Automatic Control Research Institute,Xi’an 710065,China)

机构地区：[1]西安飞行自动控制研究所,陕西西安710065

出　　处：《压电与声光》2023年第2期271-276,282,共7页Piezoelectrics & Acoustooptics

摘　　要：核磁共振陀螺作为目前世界上体积最小的导航级陀螺,已受到国内外的广泛重视。核磁共振陀螺通过检测磁场中原子核自旋进动频率的改变确定载体角速度,其陀螺精度与磁场的均匀性、稳定性密切相关。导航级核磁共振陀螺需要飞特级磁场环境,高效磁屏蔽一般仅能完成5~6个数量级的磁抑制,还需进行主动磁补偿。该文从核磁共振陀螺磁场分布的理论分析出发,通过数学计算和计算机仿真,分析和研究了横向磁补偿系统的磁场分布,并对横向磁补偿线圈进行了优化设计。设计的核磁共振陀螺横向磁补偿系统磁场均匀性较优化前提高约13倍,满足了核磁共振陀螺的使用需求。该工作为核磁共振陀螺仪设计和制造提供了一定的理论依据和参考价值。As the world's smallest navigation-grade gyroscope,the nuclear magnetic resonance(NMR)gyroscope has been received widespread attention at home and abroad.The NMR gyroscope determines the angular velocity of the carrier by detecting the change of the spin precession frequency of the nucleus in the magnetic field,and its accuracy is closely related to the uniformity and stability of the magnetic field.The navigation-grade NMR gyroscopes require an fT-level magnetic field environment,while high-efficiency magnetic shielding can generally achieve only 5 to 6 orders of magnitude of magnetic suppression,thus active magnetic compensation is also required.Based on the theoretical analysis of the magnetic field distribution of NMR gyroscope,the lateral magnetic compensation system is analyzed and studied by the mathematical calculation and computer simulation,and the lateral compensation coil is optimized and designed.The magnetic field uniformity of the designed gyroscope lateral compensation system is nearly about 13 times higher than before optimization,meeting the usage requirements of NMR gyroscope.This work provides a theoretical basis and reference value for the design and manufacture of nuclear magnetic resonance gyroscope.

关 键 词：核磁共振陀螺仪 主动磁补偿 横向补偿线圈 磁场均匀性 

分 类 号：TN382[电子电信—物理电子学] U666.1[交通运输工程—船舶及航道工程]