用于地下未爆弹探测的频域电磁传感器设计
Design of Frequency Domain Electromagnetic Sensor for Underground Unexploded Ordnance Detection
刘孝天 1张志杰1
作者信息
- 1. 中北大学仪器科学与动态测试教育部重点实验室 太原 030051
- 折叠
摘要
未爆弹药通常位于地表以下,探测过程复杂,干扰多.利用频率域电磁法探测未爆弹时,需考虑激励和接收线圈之间的相互耦合.论文利用关于一次场对称的接收结构,使流入和流出接收线圈的磁通相互抵消,从而减小一次场对响应的影响.通过仿真研究了各接收线圈的响应信号,提出了基于传感器的水平和竖直定位方法.最后参照仿真尺寸搭建实验平台,对三种不同尺寸的未爆弹药的探测深度可达1.2 m.验证了水平定位方法的可行性,竖直定位误差在10 cm以内.
Abstract
Unexploded ordnance is usually located below the surface and the detection process is complex with many interfer-ences.Mutual coupling between excitation and receiving coils is considered when unexploded ordnance is detected by frequency do-main electromagnetic method.The receiving structure symmetrical about the primary magnetic field is used to make the magnetic flux flowing into and out of the receiving coil cancel each other out,thus reducing the influence of the primary field on the response.The response signals of each receiving coil are studied by simulation,and the horizontal and vertical positioning methods based on the sensor are proposed.Finally,the experimental platform is set up with reference to the simulation size,and the detection depth of three different sizes of unexploded ordnance can reach 1.2 m.The feasibility of the horizontal positioning method is verified,and the vertical positioning error is within 10 cm.
关键词
频域电磁法/未爆弹/电磁传感器/主场耦合Key words
frequency domain electromagnetic method/unexploded ordnance/electromagnetic sensor/coupling of primary field引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据