磁力仪三轴非正交的转动补偿方法

Rotating compensation method of non-orthogonal tri-axial magnetometer

为解决磁力仪三轴非正交的问题,建立了三轴磁力仪误差补偿模型,提出了基于旋转数据正弦曲线拟合的方法,对三轴磁力仪的非正交性进行标定。利用正弦曲线的初始相位角求解标定参数,实现了对三轴磁力仪的非正交标定及输出补偿。结果表明:该方法对磁力仪非正交参数的求解精度高,标定后的磁力仪的磁测准确性改善明显;该方法不需要利用高精度光泵磁强计测量磁场的强度,为三轴磁力仪的非正交参数标定提供了一个新的有效的途径。

For the sake of tri-axial magnetometer calibration,an error compensation model of tri-axial magnetometer was established.The sine curve fitting method was proposed to calibrate the tri-axial magnetometer based on spin data.The calibration of tri-axial magnetometer could be implemented by calculating the calibration parameters using the initial phase angles of the sine curves.The results indicate that it has high precision to calculate the calibration parameters of tri-axial magnetometer,and the measurement accuracy of calibrated magnetometer is improved significantly.It dose not require high-precision optical pumping magnetometer to measure the magnetic field intensity,thus it puts forward an effective way for calibrating tri-axial magnetometer.