摘要
针对磁法勘探建立高精度磁异常模型的研究多基于矢量数据而非标量数据,并且未与延拓数据进行检验的问题,该文基于标量数据结合延拓方法对旋转椭球体、磁偶极子阵列、以及两者混合模型进行研究。研究显示各磁矩结果符合收敛特征,在与正演结果在同一高度进行比较检验一致性时,混合模型内符合精度优于其他两模型,最大相对误差小于3%,相对均方根误差小于1%;在外推高度与延拓结果比较检验有效性时,3类方法的平均精度仅相差2.5%,混合模型整体磁异常值峰值小于延拓结果,表明在外推的场景中存在一定的过拟合现象,磁偶极子阵列模型外推时的效果更好、表现更稳定,其相对均方根误差约为6%。研究成果在船舶消磁、水下舰船目标探测方面具有重要应用价值。
The research on establishing high-precision magnetic anomaly models for magnetic exploration is mostly based on vector data rather than scalar data,and has not been verified with extension data.This paper uses scalar data combined with extension methods to study rotating ellipsoids,magnetic dipole arrays,and their mixed models.In the inversion modeling,the results of each magnetic moment conform to the convergence characteristics,and the mixed model has better accuracy than the other two models,with a maximum relative error of less than 3%and a relative root mean square error of less than 1%;When extrapolating the model,the average accuracy of the three methods only differs by 2.5%.The peak value of the overall magnetic anomaly in the mixed model is smaller than the extrapolation result,indicating a certain degree of overfitting in the extrapolated scenario.The magnetic dipole array model performs better and more stably when extrapolated,with a relative root mean square error of about 6%,which is better than the other two models.The research results have important application value in ship demagnetization and underwater ship target detection.
作者
张仕泽
王正涛
许婷
ZHANG Shize;WANG Zhengtao;XU Ting(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Hubei Luojia Laboratory,Wuhan 430079,China)
出处
《测绘科学》
北大核心
2025年第6期145-156,共12页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41974007,41774019,42274003)。
关键词
舰船磁场
旋转椭球体
磁偶极子
混合模型
磁场正反演
ship magnetic
rotating ellipsoid
magnetic dipole
hybrid model
magnetic field forward and inversion
