光学精密工程2017，Vol.25Issue(7)：1919-1926,8.DOI:10.3788/OPE.20172507.1919
十字形磁梯度张量系统的误差校正
Error calibration of cross magnetic gradiometer
摘要
Abstract
For the vector magnetometer errors (scale factors,non-orthogonal error,bias) and misalignment error of the cross magnetic gradiometer,an error calibration method was proposed in this paper.Firstly,an error calibration model of the vector magnetometer errors was established,ellipsoid fitting parameters are calculated by the least square algorithm under ellipsoid restriction for fitting the measurement data to an ellipsoid.Then the Cholesky factorization was used to calculate the error calibration matrix of the vector magnetometer errors,and then the misalignment error calibration matrix could be solved by the orthogonal Procrustes method.Finally,simulations and experiments were carried out for verification of the proposed error calibration method.The experiment result shows:after calibration,the maximum fluctuation quantity of all components of the magnetic gradient tensor reduces from 10 049 nT/m to 52 nT/m.The proposed error calibration method can effectively calibrate the cross magnetic gradiometer,and the cross magnetic gradiometer can be calibrated without using high precision tri-axial non-magnetic platform,the proposed method has high value for practical application.关键词
磁场测量/椭球拟合/误差校正/磁梯度张量Key words
magnetic field measurement/ellipsoid fitting/error calibration/magnetic gradient tensor分类
交通工程引用本文复制引用
迟铖,吕俊伟,黄婧丽..十字形磁梯度张量系统的误差校正[J].光学精密工程,2017,25(7):1919-1926,8.基金项目
国家863高技术研究发展计划资助项目(No.2015AA0922) （No.2015AA0922）
