环形磁通门的非线性误差及补偿技术  

Modeling and compensation of ring-core fluxgate's nonlinear error

作　　者：韩维维[1] 杨晓非[1] 欧阳君[1] 陈实[1] 

机构地区：[1]华中科技大学光学与电子信息学院,武汉430074

出　　处：《电子测量技术》2013年第3期98-101,共4页Electronic Measurement Technology

基　　金：国家自然科学基金(51172080)资助项目

摘　　要：磁通门技术被广泛应用于低频微弱磁场领域,尤其是地磁场的测量。地磁的精确测量要求磁力仪具有极小的误差,目前国内外关于磁通门误差的补偿研究主要针对于比例因子误差、零偏和非正交误差,对非线性误差的研究比较少。利用软磁材料的磁化曲线函数可由多项式拟合的特性,建立了环形磁通门传感器的非线性误差模型,并提出了非线性误差补偿方法。通过实验对一维环形磁通门传感器的非线性误差进行矢量补偿,取得了显著效果。Fluxgate magnetometer is widely used in low-frequency weak magnetic field measurement,especially in earth field measurement,while accurate measurement of earth field requires low error. So far, researches of fluxgates＇ error are mostly focused on compensation of gain error,zero offset or non-orthogonal error,while few are on nonlinear error compensation. Based on the fact that magnetization curve function of soft magnetic material can be obtained by polynomial fitting, and a nonlinear error model of ring core fluxgate has been established and corresponding compensation method is proposed. Finally,an experiment to measure and compensate the nonlinear error of a ring core fluxgate has been carried out,and the result is remarkable.

关 键 词：环形磁通门 非线性误差 数学建模 矢量补偿 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]