摘要
空气负离子浓度是判断空气质量好坏的重要标准。传统的空气负离子浓度检测仪通过电容式离子收集器测量负离子在收集板两端形成的电流,根据测量电流与空气负离子浓度的关系进行计算。采用传统方法设计的空气负离子浓度检测仪只能测量有限几种半径的空气负离子浓度,并且在测量大半径的空气负离子浓度时存在一定的系统误差。为满足空气负离子浓度高精度检测的应用需求,通过模拟分析不同半径的空气负离子在收集器中的运动轨迹,提出了一种基于迁移率分析的空气负离子浓度检测方法,给出了相应的电路系统和设计参数,分析论证了系统设计的合理性。该方法将电流检测与数值计算相结合,能够精确测定空气中不同半径的负离子浓度,在环境监测与评价领域有重要的应用价值。
Negative air ion concentration is an important criterion for judging air quality.The traditional negative air ion concentration detector measures the current formed at the two ends of the collector plate by a capacitive ion collector,and calculates the concentration by the relationship between the measured current and the negative ion concentration.The negative air ion concentration detector designed by this method can only measure the concentration of a limited number of radius,and there is a certain systematic error in measuring the concentration of a large radius.In order to meet the requirement of high precision detection of negative air ion concentration,a method of detecting negative air ion concentration based on mobility analysis is proposed by simulating and analyzing the trajectories of air ions with different radius in the collector.The corresponding circuit system and design parameters are given,and the rationality of the system design is analyzed and demonstrated.This method combines current detection with numerical calculation,and can accurately measure the concentration of negative ions with different radius in the air.It has important application value in the field of environmental monitoring and assessment.
作者
韩佳佳
陶宗明
张辉
Han Jiajia;Tao Zongming;Zhang Hui(PLA Army Academy of Artillery and Air Defense,Hefei 230031)
出处
《气象科技》
2019年第5期747-751,共5页
Meteorological Science and Technology
基金
国家自然科学基金项目（41475025）资助
关键词
空气质量
空气负离子浓度
迁移率
离子半径
air quality
negative ion concentration
ion mobility
ionic radius
作者简介
韩佳佳,男,1985年生,硕士,讲师,从事物理教学与大气科学研究,Email:hjaza_f@163.com;通信作者:陶宗明,Email:zmtao@aiofm.ac.cn。
