基于最小二乘的地磁传感器误差补偿方法

Error correction model of geomagnetic sensor based on least square method

地磁数据的有效获取是地磁导航技术的关键之一，然而各种误差以及干扰的存在使得地磁传感器的直接测量值与地磁真实值存在差异，基于此本文提出了基于最小二乘法的地磁传感器补偿方法。通过对地磁传感器的误差分析，构建了地磁传感器的误差模型，基于最小二乘法拟合提出了地磁传感器的补偿模型，在野外实验验证本补偿模型的效果。实验结果表明，本文所介绍的地磁传感器补偿模型可有效的对传感器误差进行补偿，补偿后的数据误差在1％以内，可实际应用于工程项目之中。

The direct measurement values of geomagnetic sensors are different from those of geomagnetic truth, because of the presence of errors and disturbances, therefore this paper presents a method of geomagnetic sensor error correction based on least squares method Based on the error analysis the error model of the geomagnetic sensor is constructed based on the error analysis, and the correction model of the geomagnetic sensor is proposed based on the least squares fitting method. The effect of the calibration model is verified in the field experiment. The experimental results show that the geomagnetic sensor calibration model described in this paper can effectively calibrate the sensor error. The data error after compensation is less than 1%,and it can be applied to engineering projects.