激励磁场作用下的目标磁异常分析  

Analysis of target magnetic anomaly under excitation magnetic field

作　　者：杨天晗 李世中[1] 方玲玲 杜东艳 YANG Tianhan;LI Shizhong;FANG Lingling;DU Dongyan(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学机电工程学院,太原030051

出　　处：《兵器装备工程学报》2025年第3期155-161,共7页Journal of Ordnance Equipment Engineering

摘　　要：为解决普通磁传感器探测距离短的问题,可以利用激励磁场增强目标磁异常量从而扩大磁传感器探测范围。通过为磁传感器布置磁钢所产生的激励磁场,对目标进行磁化从而产生明显的磁异常量,再利用磁传感器对异常信号进行感应。为此,构建了四组不同排列的磁钢结构,以典型铁棒为目标对磁传感器的响应特征进行了对比仿真,并以此为基础设计了磁探测装置,对实际探测效果进行了实验验证。结果表明,对比于无磁钢条件下的磁探测,激励磁场能够有效扩展目标的磁异常量和探测范围。当两块磁钢以磁传感器测量点为中心垂直布置时,激励磁场对铁棒磁化的效果最为显著,获得磁异常量最大,便于信号的采集。此研究为提升磁传感器对目标的探测特性提供了新的技术途径。In order to solve the problem of short detection range of common magnetic sensors,the excitation magnetic field can be used to enhance the target magnetic anomaly and expand the detection range of magnetic sensors.By arranging magnetic steel to generate a magnetic field for the sensor,the target is magnetized to produce noticeable magnetic anomalies,which are then detected by the sensor.Four different configurations of magnetic steel structures were founded,and the response characteristics of the magnetic sensor were compared and simulated using typical iron bars as targets.Based on these findings,a magnetic detection device was designed and its actual detection performance was verified through experiments.The results show that,compared to detection without magnetic steel,the excitation magnetic field effectively expands the magnetic anomaly and detection range of the target.When two pieces of magnetic steel are arranged vertically with the measuring point of the magnetic sensor at the center,the magnetization effect on the iron bar is most significant,producing the largest magnetic anomaly and facilitating signal collection.This research provides a new technical approach to enhance the detection characteristics of magnetic sensors.

关 键 词：磁探测 激励磁场 磁异常 磁传感器 永磁体 

分 类 号：TM153.1[电气工程—电工理论与新技术]