为了获得高精度且稳定的地磁信号,设计了基于磁阻传感器的地磁信号采集与存储系统,并建立三轴磁阻传感器灵敏度误差、非正交误差和零点漂移误差参数模型。根据工程优化设计思想建立误差参数的目标优化函数,应用坐标轮换法获得最优误差补偿参数。利用最优误差补偿参数,通过仿真,使磁测数据标准差从0.03Gs降低到0.01Gs。仿真结果表明,通过对实际磁测数据进行误差补偿,可以有效提高磁测数据精度和稳定性。

In order to obtain highly precise and stable magnetic signal, a geomagnetic signal acquisition and storage system based on magnetic resistance sensor was designed and parameter models about three-axis magnetic resistance sensor sensitivity errors, non-orthogonal error and zero drift error were established. An objective optimization function about error parameters with engineering optimization design thought was established. The coordinate transformation method was adopted to obtain optimal error compensation parameters. The optimal error compensation parameters were used to make standard deviation is reduced from 0.03 Gs to 0.01 Gs through simulation. Simulation results show that the precision and stability of the magnetic data can be effectively raised by error compensation for the actual magnetic data.