The geomagnetic sensor is a kind of highly sensitive sensor, which is easy to be interfered with by the outside in the process of measurement. To solve this problem, the author uses the least square method to estimate the gain value and sensitivity product value of the amplification circuit of the geomagnetic sensor and explores the solution of the bias voltage of the geomagnetic sensor by using the ellipsoid fitting model. By analyzing the error sources of the geomagnetic sensors in the measurement process, the error compensation model covering various error factors is constructed. All parameters of the error compensation model are obtained by fitting the experimental data of the turntable. After several experiments with different attitude angles, the validity of the compensation model is verified, and the measurement accuracy of the roll angle is improved, which meets the requirements of roll angle measurement.

地磁传感器是一种高灵敏度的传感器，在测量过程中容易受到外界的干扰。为解决这个问题，作者采用最小二乘法估计地磁传感器放大电路的增益值和灵敏度积值，探索了利用椭球拟合模型求解地磁传感器偏置电压的方法。通过分析地磁传感器在测量过程中的误差来源，构建了涵盖各种误差因素的误差补偿模型。误差补偿模型的所有参数都是通过对转台的实验数据进行拟合得到的。经过多次不同姿态角的实验，验证了补偿模型的有效性，