一、研究目的膜式燃气表可以简单归结为户内表和户外表两大类。根据多年来的工作实践,户内表普遍存在入户难、抄表难等问题。有些城市在逐步尝试使用户外表,这既符合有关三表出户的政策要求,也基本可以避免户内表的缺点。但是户外表易受环境温度的影响。为此,我们在实验室对膜式燃气表进行了两项实验研究:一是研究环境温度对普通膜式燃气表计量性能的影响;二是根据欧洲 First, the purpose of research Membrane gas meter can be simply attributed to the indoor table and outdoor table two categories. According to many years of work practice, indoor table is generally difficult to enter the home, meter reading and other difficult issues. Some cities are gradually trying to make the user’s appearance, which not only meets the policy requirements for making the three tables, but also basically avoids the disadvantages of the indoors. However, outdoor tables are susceptible to ambient temperature. To this end, we conducted two experimental studies on membrane gas meters in the laboratory: one is to study the effect of ambient temperature on the metrology performance of common membrane gas meters;