计量学报2024，Vol.45Issue(9)：1339-1347,9.DOI:10.3969/j.issn.1000-1158.2024.09.11
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
摘要
Abstract
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 m3/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Key words
flow measurement/ultrasonic gas flowmeter/Bayesian information fusion/real-time performance evaluation/uncertainty分类
通用工业技术引用本文复制引用
梁爽,张丽稳,张鹏飞,苗芊,王瑞兵,周君洋,朱阁红,张凯..一种在线评估超声波气体流量计性能的新方法[J].计量学报,2024,45(9):1339-1347,9.基金项目
国家市场监督管理总局科技计划(2023MK229) （2023MK229）
