烟道截面面积校准装置模型研究及不确定度评定

doi:10.3969/j.issn.1000-1158.2020.11.09

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摘要为了保证基于速度面积法烟道流量测量的准确性,需要准确测量出烟道截面面积。研发了一套烟道截面面积在线校准装置,能准确测量烟道内部几何尺寸,进而计算截面面积。讨论了基于随机抽样一致性截面面积拟合算法以及基于最小二乘法截面面积算法拟合计算的拟合特性,对比并优化后的拟合模型测量平均值的最大偏差为0.02%,装置测量重复性为0.013%。同时对装置的测量不确定进行评定,校准装置相对扩展不确定度为0.17%(k=2)。

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	杨阳
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	孔海燕
	朱泽军

关键词 ：计量学, 烟道流量, 截面面积, 校准装置, 最小二乘法, 不确定度评定

Abstract：In order to ensure the accuracy of stack flowrate measurement based on velocity area method,it is necessary to accurately measure the stack cross section area.A stack cross section area calibration facility is developed,which can accurately measure the internal geometry of stack,and then calculat cross section area.At the same time,the cross section area fitting characteristics of random sampling method and least square method are discussed.After comparison and optimization,the maximum error of the average value of the fitted model is 0.02%,and the facility repeatability is 0.013%.Meanwhile the measurement uncertainty of the facility is evaluated,and the relative expended uncertainty is 0.17%(k=2).

Key words： metrology stack flowrate cross section area;calibration facility;least-squares refinement uncertainty evaluation

收稿日期: 2019-12-20 发布日期: 2020-11-02

PACS:

TB937

基金资助:国家重点研发计划专项(2016YFF0204403)

通讯作者: 张亮(1982-),男,北京人,中国计量科学研究院副研究员,主要从事污染物排放计量方面的研究。Email:zhangliang@nim.ac.cn E-mail: 1822598256@qq.com

作者简介: 杨阳(1994-),男,湖南邵阳人,中国计量大学与中国计量科学研究院联合培养硕士研究生,研究方向为烟道流量测量。Email:1822598256@qq.com

引用本文:

杨阳,张亮,张洪军,王池,孔海燕,朱泽军. 烟道截面面积校准装置模型研究及不确定度评定[J]. 计量学报, 2020, 41(11): 1364-1369.
YANG Yang,ZHANG Liang,ZHANG Hong-jun,WANG Chi,KONG Hai-yan,ZHU Ze-jun. Study on the Stack Cross Section Area Calibration Facility and Its Uncertainty Evaluation. Acta Metrologica Sinica, 2020, 41(11): 1364-1369.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.11.09 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I11/1364

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