三轴磁通门传感器误差校正方法

摘要

The three-axis fluxgate magnetometer is widely used in military and civil fields, but because of its non-or-thogonal three-axis, zero offset and scale coefficient inconsistency, the three-axis fluxgate magnetometer has diversionary er-ror, which affects the accuracy of magnetic measurement. In this paper, the mechanism of diversionary error is analyzed, the error model is established, the error parameters are estimated by least square method, and then the diversionary error is corrected by magnetic measurement data. The simulation results show that the algorithm can estimate the error parameters accurately, and has a good correction effect on the magnetic field component and the total field modulus, which proves the effectiveness of the algorithm. In the experiment of magnetic field measurement, the error parameters of the magnetometer are estimated by this algorithm, and the measured magnetic field data are corrected. The diversionary error of the corrected data is obviously restrained, and the measurement accuracy of the three-axis fluxgate magnetometer is improved.%三轴磁通门传感器在军事和民用领域应用广泛,但由于其存在三轴非正交、零偏和标度系数不一致的问题,导致其存在转向差,影响了其磁测精度.首先,分析了转向差的产生机理,建立了误差模型,通过最小二乘法估算出了误差参数,进而对磁测数据进行了转向差校正.仿真计算表明,该算法对误差参数估算准确,对磁场分量和总场模值均有较好的校正效果,证明了算法的有效性.在磁场测量实验中,利用该算法估算出了传感器的误差参数,并对实测磁场数据进行了校正.校正后,数据的转向差得到了明显抑制,提高了三轴磁通门传感器的测量精度.