摘要
三轴磁强计存在各轴刻度因子、零偏和轴间非正交性误差,需要研究其校正方法。基于标量校正法思想,对磁强计校正模型进行了推导,提出基于高斯牛顿迭代法的磁强计校正方法。采用高精度质子磁力仪提供磁场基准值。借助无磁转台转动磁强计,转动过程中磁强计连续采样,测量数据更具代表性和实用性。仿真结果表明,磁强计误差从162.135 nT降低到1.467 nT。实验结果表明,校正后,磁强计绕3个轴转动的测量值误差分别从1133.887 nT、1317.554 nT、1303.994 nT降低到36.964 nT、20.922 nT、15.664 nT。表明该方法能有效降低磁强计测量误差,磁强计精度明显得到提高。
In three axis magnetometers, scale factor, bias and non-orthogonality errors of the axes exist, so it is important to study its calibration method. The magnetometer calibration model is deduced based on scalar calibration method, and a magnetometer calibration method based on Gauss-Newton algorithm is proposed. A high precision proton magnetometer is used to provide the magnetic field intensity reference value. A nonmagnetic turntable is used to rotate the magnetometer, and during the rotation process the magnetometer records sample data continuously, which makes the measurement data more applicable and representative. Simulation results show that the magnetometer error is reduced from 162. 135 nT to 1. 467 nT. Experiment results show that, after calibration, the measurement errors of the magnetometer rotating three axes are reduced from 1133. 887 nT, 1317. 554 nT, 1303. 994 nT to 36.964 nT,20. 922 nT, 15. 664 nT, respectively,which shows that the p method can effectively reduce the measurement error of the magnetometer and obviously improve the precision of the three axis magnetometers.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2013年第7期1506-1511,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(51175507
61171134)
湖南省研究生科研创新(CX2012B012)资助项目
关键词
三轴磁强计
高斯牛顿算法
校正
转动
无磁转台
质子磁力仪
three axis magnetometer
Gauss-Newton algorithm
calibration
rotation
nonmagnetic turntable
proton mag-netometer
