一种在线评估超声波气体流量计性能的新方法  

A New Method for Online Assessment of Ultrasonic Gas Flowmeter Performance

作　　者：梁爽 张丽稳 张鹏飞[3] 苗芊[3] 王瑞兵 周君洋 朱阁红 张凯[1] LIANG Shuang;ZHANG Liwen;ZHANG Pengfei;MIAO Qian;WANG Ruibing;ZHOU Junyang;ZHU Gehong;ZHANG Kai(College of Metrology,Measurement and Instrumentation,China Jiliang University,Hangzhou,Zhejiang 310018,China;Branch of Science and Technology Research Institute,National Petroleum&Natural Gas Pipeline Network Group Co.LTD,Langfang,Hebei 065000,China;Zhengzhou Tobacco Research Institute,China National Tobacco Corporation,Zhengzhou,Henan 450100,China)

机构地区：[1]中国计量大学计量测试与仪器学院,浙江杭州310018 [2]国家石油天然气管网集团有限公司科学技术研究总院分公司,河北廊坊065000 [3]中国烟草总公司郑州烟草研究院,河南郑州450100

出　　处：《计量学报》2024年第9期1339-1347,共9页Acta Metrologica Sinica

基　　金：国家市场监督管理总局科技计划(2023MK229)。

摘　　要：提出一种在线评估超声波气体流量计性能的新方法。原理是基于贝叶斯信息融合方法建立变动点检测模型,获得测量数据的变动趋势,实现对超声波流量计的实时性能评估。具体实施过程是将先验信息与实时样本信息相结合,迭代更新得到后验分布,其中后验分布中的后验标准差即为仪表实时不确定度。该方法相对于传统不确定度评定方法,其融入了实时测量信息,可以实时连续的评价仪表的不确定度,监测超声波流量计整个测量系统的运行情况,并及时发现异常工作情况,实现了对流量计性能的在线评估,为超声波流量计的在线监测提供了一种新的方法和途径,在小流量点Q=10 m^(3)/h时,相对扩展不确定度为1.52%,满足计量准确度等级要求。A new method for online performance evaluation of ultrasonic gas flowmeters is proposed,based on a Bayesian information fusion approach to establish a change point detection model.This method captures the trend of measurement data changes to achieve real-time performance assessment of the flowmeter.The implementation involves combining prior information with real-time sample data,iteratively updating to obtain the posterior distribution,with the posterior standard deviation representing the instrument's real-time uncertainty.Compared to traditional uncertainty assessment methods,this approach integrates real-time measurement data,allowing for continuous evaluation of the instrument's uncertainty and monitoring of the entire measurement system's operation.It can promptly detect abnormal working conditions,thereby enabling online performance evaluation of the flowmeter.At a low flow rate point of Q=10 m^(3)/h,the relative expanded uncertainty is 1.52%,meeting the metrological accuracy requirements.

关 键 词：流量计量 超声波气体流量计 贝叶斯信息融合 实时性能评估 不确定度 

分 类 号：TB937[一般工业技术—计量学]