磁罗盘误差分析与校准  

Error Analysis and Calibration of Magnetic Compass

作　　者：晁敏[1] 蒋东方[1] 文彩虹[1] 

机构地区：[1]西北工业大学自动化学院,西安710129

出　　处：《传感技术学报》2010年第4期525-532,共8页Chinese Journal of Sensors and Actuators

摘　　要：根据磁罗盘的工作原理,在详细分析了磁干扰和仪表误差等影响磁罗盘精度各因素的基础上,首先建立了一个用矩阵方程描述的磁罗盘方位指向输出的精确测量模型;接着证明了目前广泛使用的几种罗盘指向解算模型仅是上述精确测量模型在不同特定条件下的简化或泛化;随后基于不同姿态下的椭圆拟合算法对上述精确测量模型各个参数进行辨识,提出了全面校准磁罗盘方位指向的方法和步骤;最后用实例检验并比较了采用椭圆拟合模型和精确测量模型对罗盘方位解算的效果,验证了该精确测量模型的广泛适用性。Based on the fundamental principle of magnetic compass,and factors that causes interference and instrument errors which affected magnetic azimuth measurement accuracy,a precision azimuth measurement model in term of matrix equation for magnetic compass output data was deduced first. Proofs were given showing that the nowadays widely used analysis models for magnetic azimuth compass were simply simplified models of the precision measurement model under respective special conditions. Ellipse fitting algorithm was exploited under different instrument gestures to get the parameters of the proposed measurement model. Comprehensive methods and conditions for calibrating the azimuth of magnetic compass were presented later in detail. A comparison with experiment data of the ellipse fitting model and the precision measurement model was taken to show and verify all the conclusions drawn at the end.

关 键 词：方位测量 磁罗盘 测量模型 磁场干扰 罗差修正 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]