基于三维原子磁强计的核磁共振陀螺仪实验优化

Experimental Optimization of Nuclear Magnetic Resonance Gyroscope Based on Three-axis Atomic Magnetometer

核磁共振陀螺仪内嵌三维原子磁强计是实现核磁共振陀螺仪小型化的一种有效途径,故介绍了一种基于三维原子磁强计的核磁共振陀螺仪。对影响三维原子磁强计性能的重要参数进行了优化,得到了较优的x轴、y轴和z轴磁强计信号标度因子,进而实现了更灵敏的三维原子磁强计。在三维磁场闭环锁定6000s后,测得核磁共振陀螺仪的角度随机游走和零偏稳定性分别为0.038(°)/h1/2和0.94(°)/h。

The built-in three-axis atomic magnetometer in the nuclear magnetic resonance gyro-scope(NMRG)is an elegant way to realize the miniaturization of the NMRG.In this paper,a NMRG based on a three-axis atomic magnetometer is demonstrated.The important parameters that affect the performance of the three-axis atomic magnetometer are optimized,and the better scale factors of the x-axis,y-axis and z-axis magnetometer signal are obtained,and a more sensitive three-axis atomic magnetometer has been realised.After the three-axis magnetic fields are locked in closed-loop to measure the output of the NMRG for 6000 seconds,the angle random walk(ARW)and bias instability of the NMRG are measured as 0.038(°)/h1/2 and 0.94(°)/h,respectively.