电工技术学报  2019, Vol. 34 Issue (23): 4870-4879    DOI: 10.19595/j.cnki.1000-6753.tces.181540
电工理论与新技术 |
微纳电离式矿井甲烷传感器安全放电及敏感机理仿真
柴钰1, 弓丽萍1, 张晶园1,2, 赵永秀1
1. 西安科技大学电气与控制工程学院 西安 710054;
2. 西安科技大学机械工程博士后流动站 西安 710054
Simulation of Safe Discharge and Sensitive Mechanism of Micro-Nano Ionized Mine Methane Sensor
Chai Yu1, Gong Liping1, Zhang Jingyuan1,2, Zhao Yongxiu1
1. Electrical and Control Engineering Xi′an University of Science and Technology Xi′an 710054 China;
2. Postdoctoral Mobile Station of Mechanical Engineering Xi′an University of Science and Technology Xi'an 710054 China
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摘要 矿井环境下甲烷检测对瓦斯灾害的防控至关重要。微纳结构电离式传感器有响应快、易集成等特点,有望实现甲烷的快速准确检测。目前该传感器内部机理尚不完备,缺少对甲烷放电安全特性的理论及参数指导。对此,采用流体-化学动力学混合方法,仿真研究甲烷-氮气混合气体在纳米尖端微米级间隙的放电动态过程。通过计算空间电荷引起的电场畸变程度,分析甲烷无火花放电的关键参数,并基于带电子输运过程阐明甲烷安全放电机理;分析正离子成分、电子能量随甲烷浓度的演化过程,最终建立器件宏观电特性与甲烷电离效应的联系,完善微纳电离式器件的敏感机理,并分析其敏感性能。该研究为制备矿用电离式甲烷传感器奠定了理论基础。
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柴钰
弓丽萍
张晶园
赵永秀
关键词 微纳米尖端电极甲烷气体传感器安全放电参数敏感机理    
Abstract:The methane detection in the mine environments is essential for the prevention of gas disasters. The micro-nano structure ionization sensors have characteristics of fast response, easy integration, etc., it is expected to achieve the rapidly and accurately detection of methane. At present, the internal mechanism of the new sensor is still incomplete, and there is no theoretical and parameter guidance for the safety characteristics of the methane discharge. A fluid-chemical kinetic mixing method was used to simulate the discharge dynamic process of methane-nitrogen mixed gas at the microtip gap of the nanotip. By calculating the degree of electric field distortion caused by space charge, the key parameters of methane non-spark discharge were analyzed, and the safe discharge mechanism of methane was explained based on the electron transport process. Analyzed the evolution process of the positive ion composition and the electron energy with the methane concentration, and finally established the relationship between macroscopic electrical characteristics of the device and the methane ionization effect, improved the sensitive mechanism of micro-nano ionization device, and analyzed its sensitivity. The research laid the theoretical foundation for the preparation of the mine ionized methane sensors.
Key wordsMicro-nano tip electrode    methane gas sensor    safety discharge parameter    sensitive mechanism   
收稿日期: 2018-09-21      出版日期: 2019-12-11
PACS: TM213  
通讯作者: 张晶园 女,1984年生,博士,讲师,研究方向为微纳米传感技术和等离子体物理诊断。E-mail:zjy19841114@163.com   
作者简介: 柴 钰 男,1961年生,硕士,教授,研究方向为风力发电机系统及其控制。E-mail:312846544@qq.com
引用本文:   
柴钰, 弓丽萍, 张晶园, 赵永秀. 微纳电离式矿井甲烷传感器安全放电及敏感机理仿真[J]. 电工技术学报, 2019, 34(23): 4870-4879. Chai Yu, Gong Liping, Zhang Jingyuan, Zhao Yongxiu. Simulation of Safe Discharge and Sensitive Mechanism of Micro-Nano Ionized Mine Methane Sensor. Transactions of China Electrotechnical Society, 2019, 34(23): 4870-4879.
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