| 大气污染物垂直梯度自动监测系统的研制 |
| 摘要点击 1357 全文点击 1317 投稿时间：1999-09-17 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 自动监测 垂直梯度 大气污染物 机动车排气污染物 |
| 英文关键词 automatic monitoring system vertical gradients air pollutant vehicular emission |
|
| 中文摘要 |
| 设计的大气污染物垂直梯度自动监测系统是用 2个电磁阀实现 3个高度的气体采样 ,依靠分析仪器自身的抽气泵将气体样品通过聚四氟乙烯管抽入各分析仪器进行测量 ,并用一台微机和一块 AD/DA转换板实施对电磁阀的控制和数据采集 .现场观测实验表明 ,对于 25m长的采样管清洗时间可设置 1 min,而采样管长度间的差异不会导致测量 O3、SO2、NO和 NO2 小时平均浓度存在显著性差异 . |
| 英文摘要 |
| An automatic monitoring system of vertical gradients for air pollutant was developed in the study.Air pollutant sampling at the three different heights was achieved by using two electromagnetic valves in this system.Based on the air pump in the instrument,the sampling gas were drawn into analytic instrument through PTFE tube and then their concentration were measured,the control of the electromagnetic valves and the gathering necessary data were carried by using a computer and an AD/DA conversation board.The results shown that the purging time can be set as one minute for a sampling tube of 25 m long,and the difference in the measured hourly concentration of O3,SO2,NO,NO2 caused by the different sampling tube length were not significant. |
|
|
|
