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基于海尔姆霍尔茨线圈的MGT检测系统的现场校准方法

Ziqiang Yuan¹, Chen Wang¹, Yanzhang Xie²

¹State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China.

Sensors (Basel, Switzerland)

|January 10, 2026

概括

本研究介绍了一种新的现场快速校准方法,用于使用海尔姆霍尔茨线圈的磁梯度张量 (MGT) 系统. 该技术显著提高了传感器准确性和阵列一致性,用于铁磁目标检测.

科学领域:

地质物理学地质物理学
传感器技术传感器技术
仪器化仪器化仪器化

背景情况:

矢量磁计阵列对于检测铁磁目标和测量磁梯度张量 (MGT) 数据至关重要.
现有的校准方法由于旋转要求而遭受机械噪声,方向不稳定性和重复性差.
传感器错误包括比例因素,非直角性和磁干扰,限制测量精度.

研究的目的:

开发一种用于MGT系统的现场快速校准方法,克服传统旋转技术的局限性.
为了提高矢量磁力计阵列测量的准确性,一致性和可靠性.
为了实现高精度的MGT校准,无需机械旋转或专用环境.

主要方法:

使用三轴赫尔姆霍尔茨线圈来产生可控的,三维的磁场恒定大小和随机方向.
在校准期间保持传感器静止,取代了传统的旋转激发.
开发了一种双阶段快速校准算法,用于单个传感器错误建模和阵列相对校准.

主要成果:

显著减少了张量不变量C_T,从6287.84 nT/m减少到7.57 nT/m.
减少了C_T的变量,从1.46 × 10⁶减少到13.47 nT²/m^2.
压制的传感器间输出差异为1-3nT,磁场大小误差为3×10^-4 nT,大小的 5-6 级的改进.

结论:

拟议的现场校准方法有效地消除了旋转错误,并提高了阵列的一致性.
实现了高精度的MGT校准,并大大提高了准确性和可重复性.
具有强大的工程价值,可用于铁磁目标探测和地球物理调查中的实际应用.

关键词:

赫尔姆霍尔茨线圈是指赫尔姆霍尔茨线圈.磁力计阵列是一个磁力计阵列.磁力计的误差是因为磁力计的误差.快速校准方法是一种快速校准方法.

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