新型大气采样器校准方法研究及不确定度评定  

Research on Calibration Method of New Air Sampler and Uncertainty Evaluation

作　　者：王蕾[1] 高峰[1] 孟涛[1] 张益男 裘雪玲[3] WANG Lei;GAO Feng;MENG Tao;ZHANG Yinan;QIU Xueling(National Institute of Metrology,Beijing 100029,China;Nanjing Institute of Measurement and Testing Technology,Nanjing 210049;Jiangxi Institute of Metrology&Testing,Nanchang 330002)

机构地区：[1]中国计量科学研究院,北京100029 [2]南京市计量监督检测院,南京210049 [3]江西省计量测试研究院,南昌330002

出　　处：《计量科学与技术》2021年第8期46-50,45,共6页Metrology Science and Technology

基　　金：工业互联网标识解析二级节点项目(能源行业应用服务平台TC190A3X8-3);国家重点研发计划(2019YFB2006601)。

摘　　要：大气采样器是开展环境监测工作的重要计量器具,近年来,流量直读类大气采样器应用越来越广泛。JJG956-2013《大气采样器》计量检定规程只针对标准器为皂膜式流量计,对被测表为转子流量计的大气采样器,流量直读类大气采样器并不适用。经研究发现,层流差压式质量流量计相比皂膜式流量计的优点更加突出,不但可以提高工作效率,而且可以实现自动检测甚至远程检测。本文对层流差压式质量流量计校准流量直读类大气采样器的方法进行了研究,得到此方法校准的工况流量和相对示值误差的数学模型,并对示值误差不确定度进行了详细的分析,相应给出了评定的实例,证明了该方法校准直读类大气采样器的可行性。Air sampler is an important measuring instrument for environmental monitoring.With the rapid development of environmental protection industry,the direct-reading air sampler has been widely used.The current verification regulation JJG 956"Air sampler"is only applicable when the standard apparatus is soap film flowmeter,whereas it is not applicable to the air sampler whose meter is a rotameter or the flow direct-reading type air sampler.Meanwhile,the corresponding standard meters are also developing rapidly and more results showed that the laminar differential pressure mass flowmeter has more advantages than the soap film flowmeter in the regulation.It can not only improve calibration efficiency,but also realize automatic calibration or even remote calibration.In this paper,the laminar flow differential pressure mass flowmeter calibration method of flow direct-reading type of air sampler was studied.The mathematical model of flow rate and relative indication error used in the calibration condition was proposed,and the uncertainty of indication error was also analyzed in detail.In addition,the evaluation example was given to prove the feasibility of the method of calibration of direct-reading type of air sampler.

关 键 词：大气采样器 校准 相对示值误差计算 不确定度 层流差压式质量流量计 

分 类 号：TH814[机械工程—仪器科学与技术]