一种基于椭球假设的地磁传感器误差补偿方法

Geomagnetic Sensor Error Compensation Method Based on Ellipsoid Assumption

为了提高地磁总场的测量精度,在现阶段关于磁罗盘普遍采用椭圆假设补偿方法的基础上,分析地磁干扰特性,采用一种基于椭球模型假设理论的误差补偿模型补偿磁干扰环境下的地磁总场。根据此理论,用FM300地磁测量仪,并结合无磁转台进行了补偿实验。实验结果表明,该方法能有效提高地磁总场的测量精度,解决了地磁传感器不同姿态测量某点误差较大的缺陷,利用此方法能够有效简化操作,缩短测算时间。

On the basis of ellipsoid assumption compensation widely used by magnetic compass at the present stage,the characteristic of magnetic interference is analyzed for the sake of improving the measurement accuracy of geomagnetic total field.A error compensation model based on ellipsoid model assumption theory is adopted to compensate the geomagnetic total field in the magnetic interference environment.According to this theory,a compensation experiment was carried out with FM300 geomagnetic measurement instrument and antimagnetic turntable.The result shows that this method can effectively improve the measurement accuracy of geomagnetic total field,slove the problem of the much more measureing error of the geomagnetic sensor in different attitudes,simplify the operation process,and shorten the period of measurement and calculation.