速度式流量计在线校准测量结果不确定度计算分析
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摘要
为严格控制管道流量,速度式流量计在水利工程中有着广泛应用,同时为了保证速度式流量计的准确性,其校准工作必须定期执行。基于工程校准实例,结合水力学管流计算公式,分析了速度式流量计在线校准测量不确定度评定条件和评定结果,介绍了测量不确定度分析计算方法,包括不确定度分量引入,标准不确定度A类评定、B类评定与合成不确定度评定。阐述了测量不确定度评定中需关注的事项,为类似流量计校准分析提供了参考。
In order to control pipeline flow rate strictly,velocity flowmeter has been widely used in hydraulic engineering. To ensure the accuracy of the velocity type flowmeter,its calibration work must be performed regularly. To fully grasp the accuracy of measurement results,based on engineering calibration example and combined with the calculation formula of pipe flow in hydraulics,this paper analyzes the evaluation conditions and results of measurement uncertainty in on-line calibration of velocity flowmeter and introduces the measurement uncertainty analysis and calculation method,including the introduction of uncertainty components,standard uncertainty class A evaluation,class B evaluation and synthetic uncertainty evaluation. This paper provides a reference for similar flowmeter calibration analysis.
In order to control pipeline flow rate strictly,velocity flowmeter has been widely used in hydraulic engineering. To ensure the accuracy of the velocity type flowmeter,its calibration work must be performed regularly. To fully grasp the accuracy of measurement results,based on engineering calibration example and combined with the calculation formula of pipe flow in hydraulics,this paper analyzes the evaluation conditions and results of measurement uncertainty in on-line calibration of velocity flowmeter and introduces the measurement uncertainty analysis and calculation method,including the introduction of uncertainty components,standard uncertainty class A evaluation,class B evaluation and synthetic uncertainty evaluation. This paper provides a reference for similar flowmeter calibration analysis.
引文
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[2]黄向阳,耿存杰,张东飞.浅谈在线校准时超声波流量计参数设置一致性的问题[J].工业计量,2018,28(1):87-89.
[3]畅秋菊.大口径电磁流量计在线校准结果的不确定度分析[J].现代测量与实验室管理,2016,24(4):26-27,69.
[4]谭见闻,赵淞江.超声流量计在线校准大口径流量计的研究[J].计量与测试技术,2017,44(10):42-43,45.
[5]张肇刚,周欣红.浅谈便携式时差式超声波流量计的在线检测[J].计量与测试技术,2012,39(11):40-41.
[6]王池,丘逢春.超声流量计:JJG1030-2007[S].北京:国家质量监督检验检疫总局,2009.
[7] FLUXUS流量计操作说明书[M].德国:福莱克斯公司,2014.
[8]王黎,何英杰,王成.江河管道取水流量计量值溯源合格性评定[J].长江科学院院报,2013(7):127-130.
[9]陆传务.工程数学[M].武汉:华中理工大学出版社,1993.
[10]邓湘汉,陆力,徐红.水量计量量值溯源体系及关键技术标准研究[R].北京:中国水利水电科学研究院,2014.
[11]叶德培.测量不确定度理解评定与应用[M].北京:中国计量出版社,2009.
[12]王黎,何英杰,李晓鄂.标准表法现场计量校准管道取水流量计技术手册[M].北京:中国水利水电出版社,2016.
[13]徐英华,杨友涛.流量及分析仪表[M].北京:中国计量出版社,2008.
[14]耿维明.测量误差与不确定度评定[M].北京:中国质检出版社,2011.
[15]赵昕.水力学[M].北京:中国电力出版社,2009.