摘要
三轴磁通门传感器随着姿态变化存在空间转向差,主要原因为轴间非正交性、各轴刻度因子误差和零偏误差,需要研究校正方法,提高测量准确度.选择稳定的磁场环境,对德国的一款DM系列高精度三轴磁通门传感器进行标定.研究了传感器姿态在空间中任意变化;提出采用最小二乘法对磁通门传感器校正参数进行准确估计并校正该点转向差;传感器在验证点姿态任意变化,采用已获取的校正权值抑制验证点转向差.实验结果表明,校正点和验证点的转向差经过校正后分别从106 nT和89 nT减少到27 nT和23nT,转向差明显得到抑制,说明了校正权值在姿态任意变化情况下校正效果良好.
Diversionary error of three-axis fluxgate magnetometer can not be avoided when its attitude changes. The main reasons are non-orthogonality between axes and different amplification of each axis. So, it is necessary to research calibration method and improve measurement precision. A stable magnetic circum-stance is selected to calibrate a Germany DM-series three-axis fluxgate magnetometer. Firstly, the magnetom-eter attitude changes arbitrary. Secondly, the least squares method is used to estimate calibration parameters, and then, diversionary error is suppressed. Lastly, with the magnetometer attitude changing arbitrary at the validation place, the calibration parameters are used to reduce diversionary error. Experimental results show that the diversionary error at the calibration place and the validation place are suppressed from 106 nT and 89 nT to 27 nT and 23 nT, respectively. Diversionary errors are reduced greatly, which demonstrates that the calibration performance is effective.
出处
《测试技术学报》
2011年第4期371-375,共5页
Journal of Test and Measurement Technology
关键词
磁通门传感器
任意姿态
最小二乘
误差校正
fluxgate magnetometers
arbitrary attitude
least squares method
error calibration
