单针–板结构负电晕放电器件特性研究  

Research on Characteristics of Negative Corona Discharge Device With Single Needle-plate Structure

作　　者：陈硕 张金英[2] 杨天辰 李璐 郑天祥 CHEN Shuo ZHANG Jinying YANG Tianchen LI Lu ZHENG Tianxiang(Global Energy Interconnection Research Institute, Changping District, Beijing 102209, China State Key Laboratory of Transducer Technology, Institute of Electrics, Chinese Academy of Sciences, Haidian District, Beijing 100190, China)

机构地区：[1]全球能源互联网研究院,北京市昌平区102209 [2]中国科学院电子学研究所传感技术国家重点实验室,北京市海淀区100190

出　　处：《智能电网》2017年第8期812-816,共5页Smart Grid

摘　　要：基于电晕放电原理的气体传感器利用局部高电场将样本气体电离,根据电离特性进行气体识别。宏观尺度下的电晕放电特性研究较多,但对于微尺度下的电晕放电特性研究尚未深入。以直径为20μm的镍铬丝作为放电电极,搭建了单针–板结构电晕放电器件,研究其在不同间距下的放电过程。实验结果表明:当电极间距d≤0.2 mm时,放电直接发展为火花放电;当电极间距d≥0.5 mm时,初始阶段放电不稳定;随放电电压的增大,输出信号由低频率脉冲阶段逐渐转变为稳定电晕放电,且电极间距越大,起晕电压越高,不稳定电晕阶段越短,初始阶段脉冲幅值越小。以上结果为微尺度下负电晕放电气体传感器的研究提供了理论依据。The gas sensor based on the principle of corona discharge is used for gas identification according to the ionization characteristics by gas ionization using local high electric field.The research on the characteristics of corona discharge under the micro-scale needs further investigation although there are many researches about that at the macroscopic scale.The corona discharge device with single needle-plate structure is built by using a nichrome wire with a diameter of 20 μm as electrode to investigate the discharge process at different electrode distance.The experimental results show that the discharge develops into spark discharge directly when the electrode distance is 0.2 mm or less.When the electrode distance is greater than 0.5 mm,the initial stage of the discharge is not stable.With the increase of the discharge voltage,the output signal is gradually changed from the low frequency pulse phase to the stable corona discharge.The larger the electrode distance,the higher the corona onset voltage,the shorter the unstable corona stage,the smaller the pulse amplitude at the initial stage.These results provide a theoretical foundation for the study of the gas sensor based on negative corona discharge at micro-scale.

关 键 词：单针–板结构 负电晕放电 电极间距 气体传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]