摘要
中低速磁浮列车悬浮间隙传感器所处环境周围存在着多种电磁干扰,特别是悬浮磁场的漏磁和车辆运行时磁浮轨道感应产生的端部涡流磁场,这些磁场有可能通过检测线圈的耦合进入传感器的电路,影响悬浮间隙的检测。文中研究了这两种电磁干扰,在单磁铁模块模型的瞬态磁场仿真基础上,分析认为它们是一种低频干扰,并从屏蔽和滤波2个方面提出了解决方法。基于传感器检测频率与干扰频率的差异性,设计了一种FIR高通滤波器,仿真结果表明其抑制干扰效果良好。
There are complex electromagnetic fields around the environment where the low-speed maglev suspension sensors are located.These electromagnetic fields are electromagnetic interference to gap sensors which can achieve non-contact measurement with electromagnetic induction principle,especially magnetic field leakage of suspended magnetic field and the end eddy current field induced in the maglev track of the vehicle when running.These magnetic fields may be detected by the coupling of the coil into the sensor circuit,affecting the detection of the suspension gap.In this paper,the two kinds of electromagnetic interference were studied.Based on the transient magnetic field simulation of the single magnet module model,it was considered that they were a kind of low frequency interference,and the solution was put forward from the aspects of shielding and filtering.Based on the difference between the frequency and the interference frequency of the sensor,a FIR high-pass filter was designed.It was considered to be good to eliminate the interference with the simulation results.
作者
罗茹丹
吴峻
李中秀
LUO Ru-dan;WU Jun;LI Zhong-xiu(College of Intelligent Science,National University of Defense Technology,Changsha 410073,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2018年第11期1-6,共6页
Instrument Technique and Sensor
基金
国家重点研发计划资助(2016YFB1200600)
关键词
中低速磁浮列车
悬浮间隙传感器
电磁干扰
涡流
漏磁
瞬态磁场仿真
medium-low speed maglev train
levitation gap sensors
electromagnetic interference
eddy current
magnetic flux leakage
transient magnetic field simulation
