摘要
雷击近场等强电场环境下的磁场测量是电磁脉冲测量技术中的难点之一,由于输出端结构的径向非对称性,传统的环天线很难避免电场干扰。针对于此,研制了一种基于双环差分结构的脉冲磁场传感器,该传感器由双环天线和光传输系统组成。根据近场电磁场量的分布特性,双环天线选择平行镜像对称放置的方式,从而能够将终端电压区分为磁场响应分量和电场响应分量,再通过末端差分电路即可去除电场响应分量,得到纯净的磁场响应分量。试验表明,在邻近雷击环境模拟装置中,双环传感器相较于单环传感器具备更强的抗电场干扰能力,能够实现磁场的准确测量。
Magnetic field measurement in a strong electric field environment such as a lightning strike is one of the difficulties in electromagnetic pulse measurement technology. The traditional shielded small-loop antenna introduces radial asymmetry due to the output end structure, and it is difficult to avoid electric field interference. In response to this, this paper has developed a pulsed magnetic field sensor based on a dual-loop differential structure,which is composed of a dual-loop antenna and an optical transmission system. According to the distribution electromagnetic characteristics of the near-field, the dual-loop antenna chooses to be placed in parallel mirror symmetry, so that the terminal voltage can be divided into the magnetic field response component and the electric field response component, and then the electric field response component is removed by the differential circuit to obtain the pure magnetic field response component. Experiments have shown that in the nearby lightning strike electromagnetic field environment simulator, the dual-loop sensor has stronger anti-interference capability than the single-loop sensor,and can achieve accurate magnetic field measurement.
作者
王可
段艳涛
石立华
张琪
扶庆枫
Wang Ke;Duan Yantao;Shi Lihua;Zhang Qi;Fu Qingfeng(Unit 91336 of PLA,Qinhuangdao 066326,China;National Key Laboratory on Electromagnetic Environment Effects and Electro-Optical Engineering,Army Engineering University of PLA,Nanjing 210007,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2022年第4期56-60,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(52005509)
江苏省自然科学基金项目(BK20200586)。
关键词
雷击近场
磁场测量
电场干扰
双环差分结构
磁场传感器
lightning strike near field
magnetic field measurement
electric field interference
dual-loop differential structure
magnetic field sensor
