[1]江航成,牛立娜,邢静芳.电子式温度补偿膜式燃气表计量性能测试[J].工业仪表与自动化装置,2018,(04):107-109.[doi:1000-0682（2018）04-0000-00]
　JIANG Hang Cheng,NIU Li Na,XING Jing Fang.Metrological performance test for diaphragm gas meter with electronic temperature compensation[J].Industrial Instrumentation & Automation,2018,(04):107-109.[doi:1000-0682（2018）04-0000-00]
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电子式温度补偿膜式燃气表计量性能测试

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:
期数:
2018年04期
页码:
107-109
栏目:
出版日期:
2018-08-15

文章信息/Info

Title:
Metrological performance test for diaphragm gas meter with electronic temperature compensation
作者:
江航成1; 牛立娜2; 邢静芳2
1.金卡智能集团股份有限公司，杭州 310018；
2.河北省计量监督检测研究院，石家庄 050200
Author(s):
JIANG Hang Cheng1; NIU Li Na2; XING Jing Fang2
1. GoldCard Smart Group CO.,LTD., Hangzhou 310018,China；
2. Institute of Metrology od Hebei Province,Shijiazhuang 050200,China
关键词:
膜式燃气表; 温度补偿; 温度转换装置; 音速喷嘴; 贸易结算; 标准温度
Keywords:
diaphragm gas meter;  temperature compensation;  built-in temperature conversion device;  sonic nozzle;  trade settlement;  standard temperature
分类号:
TH814;TP206
DOI:
1000-0682（2018）04-0000-00
文献标志码:
A
摘要:
电子式温度补偿膜式燃气表不改变原来膜片正常计量方式，仅仅通过数据修正转换，较好地实现标准温度下的气体体积计量，但由于其显示分辨力过低，导致测试准确性很差，影响该产品的市场推广。在不改变燃气表结构的基础上，提出一种用户模式与检测模式的解决方法，两种电路分别对应这两种模式下的显示方案，通过按键控制电路，达到切换具体模式的目的。用户模式下显示分辨力为10 L，满足平时贸易抄表的需求；在检测模式下达到0.01 L，符合检测时的准确度要求。以音速喷嘴作为测试标准器，采用图像摄像采样方式读取温补表的标准温度下的体积读数，利用流过音速喷嘴的气体达到临界流状态时，流过喷嘴的气体质量流量保持不变的原理，获得标准温度下的实际体积値。在不改进测试装置的前提下，对温补表进行-20 ℃温度下的示值误差测试，测试结果重复性达到0.11%，检测时间缩短96%。
Abstract:
The electronic temperature compensation diaphrag gas meter does not change the normal measurement mode of the original film.Only through the data correction conversion,it is better to realize the gas volume measurement under the standard temperature.However,because of its low display resolution,the accuracy of the test is very poor,which affects the market promotion of the product.On the basis of not changing the structure of the gas meter,a solution of the use mode and the test mode is put forward.The two circuits correspond to the display schemes under the two modes, and the specific mode is achieved through the key control circuit. The display resolution is 10 L in use mode, which meets the demand of normal trade meter reading,and reaches 0.01 L in test mode, which accords with the accuracy requirement in testing.The sonic nozzle is used as a standard device, and the meter is connected with the sonic nozzle in a closed pipeline.Using the image sampling method to read the volume value of the gas meter under the standard temperature, the gas mass flow through the nozzle remains the same principle when the gas flow through the sonic nozzle reaches the critical flow state.Under the premise of not improving the test device,the indication error is tested at the temperature of -20 ℃,the repeatability of the test results is 0.11%,and the detection time is reduced by 96%.

参考文献/References:

[1] 赵会平,崔浩.膜式燃气表的温度补偿研究[J].科技与创新, 2017(16):78-79.

[2] 邓立三.机械温度补偿型燃气表计量性能的实验研究 [J].中国计量,2010( 9):79-80.
[3] 王海芳,于航,李树旺,等.膜式燃气表的温度压力补偿[J].煤气与热力,2012,32(01):63-65+81.
[4] 国家质量监督检验检疫总局.GB/T6986—2011膜式燃气表国家标准[S].北京:中国标准出版社,2012.
[5] 河北省质量技术监督局.JJF(冀)143—2018内置温度转换装置燃气表检验规范[S].北京:中国质检出版社,2018.
[6] 国家质量监督检验检疫总局.JJG620-2008[S].北京:中国标准出版社,2009.
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[8] CEN-CENELEC Management Centre.EN1359:2017 diaphragm gas meter

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备注/Memo

备注/Memo:
收稿日期：2018-05-14
作者简介：江航成(1972)，男，学士，高级工程师，主要从事流量仪表的测试研究工作。
更新日期/Last Update: 2018-08-15