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一、前言目前,在国内大量使用的气体流量标准装置是基于音速喷嘴法或标准表法工作原理,检定流量计时只能一次检定一台(家用燃气表检定装置除外),而国内早期的气体流量标准装置,多数设备落后陈旧,故障频繁,自动化程度不高,不能实现多台表检定。为了改善以往装置存在的不足,拟设计建立新型的音速喷嘴法气体流量标准装置,采用先进的计算机控制技术,全面克服上述缺陷,流量范围进一步拓宽,实现多台容积式流量计的检定,可以大大提高检
I. INTRODUCTION At present, the gas flow standard devices widely used in China are based on the working principle of the sonic nozzle method or the standard meter method. When the flow meter is calibrated, only one gas meter can be calibrated at a time (except for the domestic gas meter testing device), while the domestic gas flow rate Standard equipment, most of the old equipment out of date, frequent failures, automation is not high, can not achieve multiple table verification. In order to improve the shortcomings of the previous devices, it is proposed to design and establish a new standard gas flow rate sonic nozzle device, the use of advanced computer control technology to fully overcome these shortcomings, the flow range to further broaden the realization of multi-volume flowmeter verification can be greatly Improve inspection