矢量磁力计阵列校正方法  

Calibration method of vector magnetometer array

作　　者：刘涵 张晓娟[1,2] 郑垚鑫 Liu Han;Zhang Xiaojuan;Zheng Yaoxin(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Electronic Radiation and Sensing Technology,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100190 [2]中国科学院磁辐射与探测技术重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《电子测量技术》2021年第10期66-74,共9页Electronic Measurement Technology

摘　　要：针对传统校正方法在非均匀背景场中会面临校正性能降低,甚至完全失效的问题,设计了一种新的非均匀背景场中的矢量磁力计阵列校正方法,依据空间中一点的张量不变量的旋转不变特性,建立新的误差校正模型,并采用数值方法估计系统的校正参数。经过仿真与野外实测的双重测试,在多种背景场下,这种经过基于张量不变量的校正(TI)方法校正后的磁梯度张量矩阵的缩并CT近似为一个常数,与理论分析保持一致,表明TI校正算法在不同的背景场下都有满意的校正性能。结果表明此校正方法不仅可以应用于非均匀场中,同样也可以用于均匀场环境下,相较于传统方法实时性强,校正效果好。In order to address the problem that the traditional calibration method will face degraded calibration performance or even complete failure in non-uniform background fields, this paper designs a new calibration method for vector magnetometer arrays in non-uniform background fields, establishes a new error correction model based on the rotationally invariant property of the tensor invariant at a point in space, and uses a numerical method to estimate the calibration parameters of the system. After simulations and field tests, the scaling of the magnetic gradient tensor matrix corrected by this tensor-invariant-based correction(TI) method is approximated to be a constant under various background fields, which is consistent with the theoretical analysis, indicating that the TI correction algorithm has satisfactory correction performance under different background fields. The results show that this correction method can be applied not only in non-uniform fields but also in uniform field environments, with better real-time performance and better correction effect than the conventional method.

关 键 词：矢量磁力计阵列 校正算法 非均匀背景磁场 张量不变量 数值方法估计 

分 类 号：TN98[电子电信—信息与通信工程]