摘要
三轴磁通门磁强计被广泛地应用于地磁和空间磁场的研究。利用三轴磁强计的输出向量来估计被测磁场的模量，会有转向差存在。转向差是由磁强计三个磁轴的非正交性、各通道定标比例系数的不一致性以及各通道的零点偏置引起的。要精确计算被测磁场的模，校正转向差，就必须估计出磁强计的上述参数。本文提出的校正方法对磁强计的参数进行估计，不需造价昂贵的专用设备。仿真试验及实测数据证明这些方法是行之有效的。
Tri-axial megnetometers are widely used in geomagnetic measurement on the Earth and in space. When a tri-axial magnetometer is used to estimate a magnetic field's module,different result will be obtained in different direction. This phenomenon is called Diversionary Error. The diversionary error reduces the accuracy of estimation of the magnetic field's module. Hence,the calibration is needed. The diversionary error is related to the tri-axial magnetometer's system parameters,such as orthogonality between axes,amplification and bias of each axes. Since these parameters are not ideal,they would take effect on the estimation of magnetic field's module. There are two ways to calibrate the error gone is to measure directly the parameters of the tri-axial magnetometer,the other is to estimate them through the relationship between the outputs of the magnetometer and the magnetic field applied. An estimating formula which we have presented in this paper can be used to estimate the module exactly. The first way needs a special equipment which is very expensive and complex;whereas the second way is more effective,it only needs a simple magnetic field generator.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
1999年第4期392-397,共6页
Chinese Journal of Scientific Instrument
关键词
三轴磁强计
转向差
自适应校正
Tri-axial magnetometer Diversionary error Double-layer adaptive algorithm
