热式质量燃气表在不同气体中计量特性和自适应转换实验研究  

The thermal mass utility gas meters’ characteristics and adaptive transformation ability in different gas recognition

作　　者：汪斌[1] 江苏刚 冯勇 黄立基 WANG Bin;JIANG Sugang;FENG Yong;HUANG Liji(National Institute of Measurement and Testing Technology,Chengdu 610021,China;M-Tech (Shenzhen)Limited,Shenzhen 518116,China;Siargo (Shanghai) Ltd.,Chengdu 610041,China)

机构地区：[1]中国测试技术研究院,四川成都610021 [2]卓度计量技术(深圳)有限公司,广东深圳518116 [3]矽翔微机电系统(上海)有限公司,四川成都610041

出　　处：《中国测试》2019年第6期54-59,共6页China Measurement & Test

摘　　要：MEMS热式质量燃气表的计量准确与天然气组分变化存在相关性。本实验采用实流标定装置测量热式质量燃气表在8种不同组分12T天然气的计量性能,验证一款MEMS热式质量燃气表的气体组分识别功能。在所选择的不同气体组分实流测试中,该MEMS热式质量燃气表能够实现流过气体组分自动识别以及计量参数的自动切换,满足燃气表准确计量的要求。The metrology of the utility gas meters with MEMS thermal mass flow sensing technology is associated with thermal value or composition of natural gases. A positive pressure real gas flow calibration test facility is designed and assembled to verify the compliance of the MEMS utility gas meters to the current volumetric metrology standard with 8 kinds of 12T natural gases. The MEMS utility gas meters in this work have the embedded gas recognition capability such that when the gas thermal value or composition varies the meters can automatically compensate the referenced volumetric metrology deviations due to the changes. Tests with air and eight natural gases confirmed its gas recognition capability that met the requirements of the current metrology standards.

关 键 词：MEMS热式质量民用燃气表 气体转换系数 天然气 气体自动组分识别 正压实流环道装置 

分 类 号：TH814[机械工程—仪器科学与技术]