机电工程技术2024，Vol.53Issue(5)：34-37,4.DOI:10.3969/j.issn.1009-9492.2024.05.008
强磁场条件下气体超声波流量计PCB板建模仿真分析
Modeling and Simulation Analysis of PCB Board of Gas Ultrasonic Flowmeter Under Strong Magnetic Field
摘要
Abstract
The electromagnetic compatibility of ultrasonic echo signal processing circuit and sequential circuit of multi-channel gas ultrasonic flowmeter printed circuit(PCB)under strong electromagnetic interference environment is studied.The influence of strong electromagnetic pulse field strength on coupling current is studied,and the equivalent model of external strong electromagnetic interference source is established.Combined with three-dimensional electromagnetic field simulation software(CST)to simulate the external strong electromagnetic interference environment,by observing the different current ports of the key sensitive circuit to study the influence of different electromagnetic interference source strength on the electromagnetic coupling of the key sensitive circuit of the PCB,according to the linear relationship between the size of the strong electromagnetic interference source and the induction voltage value of the key sensitive circuit of the flowmeter PCB board.The maximum radiation threshold of the key sensitive circuit that can be disturbed by strong electromagnetic field is confirmed,and the electromagnetic sensitivity modeling and simulation method of the key sensitive circuit on the PCB board is proposed.Based on this,the relevant laws are summarized,and the corresponding design of the key sensitive circuit corresponding to the PCB is proposed to be optimized.The simulation analysis before and after the comparison shows that the coupling current of the key sensitive circuit is significantly reduced.It is proved that the ability of multi-channel gas ultrasonic flowmeter to resist coupling interference in strong electromagnetic interference environment is significantly improved.关键词
电磁兼容/三维电磁场仿真软件CST/强电磁干扰/抗耦合干扰能力Key words
electromagnetic compatibility/3D electromagnetic field simulation software CST/strong electromagnetic interference/resistance to coupling interference分类
机械制造引用本文复制引用
万小辉,李跃忠..强磁场条件下气体超声波流量计PCB板建模仿真分析[J].机电工程技术,2024,53(5):34-37,4.基金项目
国家自然科学基金(61663001) （61663001）
江西省科技厅重点研发计划(20212BBE53033) （20212BBE53033）
