作者：周书恺^1,2, 刘源², 胡鹤鸣², 刘铁军¹, 谢代梁¹

作者单位：1. 中国计量大学，浙江 杭州 310018;
2. 中国计量科学研究院，北京 100029

关键词：水流速装置;计量比对;传递标准;不确定度评价

摘要：

水流速装置是各式流速仪的检定校准装置，为考察各实验室装置量值复现的准确性，可实施装置间的计量比对。拟选用两台测速原理不同的流速仪作传递标准，针对仪器的测量重复性、长期稳定性和安装条件等在传递过程中会对比对结果产生影响的因素开展实验，并完成测量结果不确定度评定。在规定的考察时间和流速范围内，两台新流速仪做相同流速点测试实验。LS1206B转子式流速仪在测试中测量重复性保持在0.1%以下，稳定性在0.5%范围内，较之于Vector性能表现更好；LS1206B的水力螺距测量不确定度在高流速下更小，其不确定度主要来源有标准装置引入的流速不确定度、测量重复性引入的不确定度和仪器安装偏角引入的不确定度；若实际安装时偏角较大，会严重影响测量结果进而影响比对结果。另一台Vector声学多普勒流速仪在良好的信噪比环境下，重复性和稳定性都在1%以内，其不确定度来源有装置引入的流速不确定度和测量重复性引入的不确定度。

Research on the evaluation method of transfer standard for the measurement comparison of water velocity device
ZHOU Shukai^1,2, LIU Yuan², HU Heming², LIU Tiejun¹, XIE Dailiang¹
1. China Jiliang University, Hangzhou 310018, China;
2. National Institute of Metrology, Beijing 100029, China
Abstract: The water velocity device is a verification and calibration device for various flow meters. In order to examine the accuracy of the reproduction of the measurement values of various laboratory devices, the measurement comparison between the devices can be implemented. It is planned to select two flowmeters with different velocity measurement principles as the transfer standard, and carry out experiments for the measurement repeatability, long-term stability and installation conditions of the instruments which will affect the results during the transfer process, and complete the uncertainty assessment of the measurement results. Within the specified inspection time and flow rate range, the two new flow meters were tested at the same flow rate point. The measurement repeatability of LS1206B rotor flowmeter is kept below 0.1%, and the stability is within 0.5%, which is better than Vector; the LS1206B’s hydraulic pitch measurement uncertainty is smaller at high flow rates, and the main sources of its uncertainty are the uncertainty of the flow velocity introduced by the standard device, the uncertainty introduced by the measurement repeatability and the uncertainty introduced by the installation declination of the instrument; if the declination angle between instrument and water flow is large during the actual installation, it will seriously affect 14the measurement results and then affect the compare results. Another Vector acoustic Doppler velocimeter has repeatability and stability within 1% in a good signal-to-noise ratio environment. The sources of its uncertainty are the uncertainty of the flow rate introduced by the device and the uncertainty introduced by the repeatability of the measurement.
Keywords: water velocity device;measurement comparison;transfer standard;uncertainty evaluation
2024, 50(3):90-96  收稿日期: 2022-02-03;收到修改稿日期: 2022-04-13
基金项目: 国家重点研发计划(2017YFC0405705)
作者简介: 周书恺(1996-),男,浙江金华市人,硕士研究生,专业方向为水流速校准。
参考文献
[1] 水运工程 超声波流速仪: JJG 030—2004[S]. 北京: 中国标准出版社, 2004.
Ultrasonic flow meter for water transportation engineering: GB/T 11826-2019 [S].Beijing: Standards Press of China , 2019.
[2] 转子式流速仪: GB/T 11826—2019[S]. 北京: 中国标准出版社, 2019.
Rotary flow meter: GB/T 11826-2019 [S].Beijing: Standards Press of China, 2019.
[3] 直线明槽中的转子式流速仪检定/校准方法: GB/T 21699—2008[S]. 北京: 中国标准出版社, 2008.
Verification/calibration method for rotor type flow meters in straight open channels: GB/T 21699-2008 [S].Beijing: Standards Press of China, 2008.
[4] 计量比对: JJF 1117—2010[S]. 北京: 中国标准出版社, 2010.
Measurement comparison: JJF 1117-2010 [S]. Beijing: Standards Press of China , 2010.
[5] 廖艳, 赵晶, 孙建平, 等. 国家温度副基准铟凝固点与国家基准的比对评述[J]. 中国测试, 2020(8): 22-27
LIAO Y, ZHAO J, SUN J P, et al. Comments on interlaboratory comparison between national secondary standard and primary standard for temperature on indium freezing point[J]. China Measurement& Test, 2020(8): 22-27
[6] 测量仪器比对规范: JJF 1117—2004[S]. 北京: 中国标准出版社, 2004.
Comparison specification for measuring instruments: JJF 1117-2004 [S]. Beijing: Standards Press of China , 2004.
[7] 周坚, 丁淑兰, 毛安平. 导体直流电阻比对试验样品均匀性评定探讨[J]. 中国测试, 2020, 46(S2): 167-169
ZHOU J, DING S L, MAO A P. Discussion on the uniformity evaluation of conductor DC resistance comparison test samples[J]. China  Measurement &  Test, 2020, 46(S2): 167-169
[8] 姚永熙. 国内外转子式流速仪检定方法分析[J]. 水文, 2012, 32(3): 1-5+92
YAO Y X. Analysis of calibration methods for rotary flow meters at home and abroad[J]. Hydrology, 2012, 32(3): 1-5+92
[9] HUBBARD E F , THIBODEAUX K G , MAI N D. Quality assurance of US geological survey stream current meters: the meter-exchange program 1988-98[R]. US Geological Survey, 1999.
[10] SAUER V B,MEYER R W. Determination of error in individual discharge measurements 92-144[R]. U. S. Geological Survey, 1992.
[11] MARC D H, BEAT W. The hydrometric calibration facility from metas: a primary standard for liquid flow speed[C]. Ernational Symposium on Fluid Flow Measurement, Viginia, 2015.
[12] 朱云龙, 胡鹤鸣, 王志刚, 等. 基于拖曳水槽流速校准装置的ADV性能测试[J]. 水力发电学报, 2018, 37(11): 36-42
ZHU Y L, HU H M, WANG Z G, et al. ADV performance testing based on a drag tank flow velocity calibration device[J]. Journal of Hydroelectric Engineering, 2018, 37(11): 36-42
[13] JANICE M. Workgroup for hydraulic laboratory testing and verification of hydroacoustic instrumentation[C]. IEEE/OES Eleventh Current, Waves and Turbulence Measurement (CWTM), IEEE, 2015.
[14] 陈海滨, 袁寅, 李红梅. 路强仪测量结果不确定度评定[J]. 中国测试, 2021, 47(S2): 191-193
CHEN H B, YUAN Y, LI H M. Evaluation of uncertainty in measurement results of road strength instrument[J]. China  Measurement &  Test, 2021, 47(S2): 191-193
[15] 测量不确定度评定与表示: GB/T 27418-2017[S]. 北京: 中国标准出版社, 2017.
Evaluation and representation of measurement uncertainty: GB/T 27418-2017 [S].Beijing: Standard Press of China, 2017.
[16] MARVIN J , HANNS J  S  , RENE W. Development of a setup and measurement procedure for unsteady model velocities in a large water towing tank[C]. AIAA Scitech 2019 Forum, San Diego, 2019.