调制微波冷等离子体特性研究  

Investigation on the Characteristics of Modulated Microwave Cold Plasma

作　　者：李雅瑞 柏怡文 邵益波 金伟[1,2] 于丙文[1] Li Yarui;Bai Yiwen;Shao Yibo;Jin Wei;Yu Bingwen(College of Control Science and Engineering,Zhejiang University,Hangzhou Zhejiang 310027;Research Center for Analytical Instruments and Intelligent Systems,Huzhou Institute of Zhejiang University,Huzhou Zhejiang 313000)

机构地区：[1]浙江大学控制科学与工程学院,浙江杭州310027 [2]浙江大学湖州研究院,分析仪器及智能系统研究中心,浙江湖州313000

出　　处：《中国仪器仪表》2025年第4期82-86,共5页China Instrumentation

基　　金：湖州市科技项目(项目编号:2022YZ28);国家自然科学基金项目(项目编号:62073287)。

摘　　要：本文基于微波等离子体炬装置,对调制微波下等离子体的特性进行了研究和分析。其中对等离子体生命时长的研究,揭示了调制微波下等离子体储存能量和释放能量的过程。此外,针对等离子体的啸叫声这一现象,探究了等离子体音频信号的发音规律以及发音机理,证明了调制微波等离子体射流发出的是频率恒定不变的音频信号。用周期方波信号模拟微波源调制信号,并进行快速傅里叶变换,发现模拟结果与音频信号实际的频率分布相同。这表明其音频频率受微波调制信号频率的调控。The article is based on a microwave plasma torch device,and studies and analyzes the characteristics of plasma under modulated microwave.The study on the lifetime of plasma reveals the process of energy storage and release of plasma under modulated microwaves.In addition,in response to the phenomenon of plasma howling,the pronunciation rules and mechanism of plasma audio signals were explored,and it was proved that the modulated microwave plasma jet emits a constant frequency audio signal.Simulate microwave source modulation signals using periodic square wave signals and perform fast Fourier transform.It was found that the simulation results are consistent with the actual frequency distribution of audio signals.This shows that its audio frequency is controlled by the frequency of microwave modulation signal.

关 键 词：微波冷等离子体 调制微波源 等离子体生命时长 音频分析 

分 类 号：O539[理学—等离子体物理]