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| Optimization of Flow Measurement Uncertainty in Open Channel with Triangular Thin-walled Weir Based on Data Fitting Method |
| GAO Ming,GUO Hui,JIA Zhizhuo |
| Institute of Metrology of Hebei Province, Shijiazhuang, Hebei 050200, China |
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Abstract Aiming at the problem of low measurement accuracy of triangular thin-walled weir open channel flowmeter when used at non-fixed points, based on the uncertainty pre-assessment results, it is proposed to use curve fitting instead of linear interpolation to calculate the flow coefficient, and a digital output magnetostrictive water level sensor is used to measure the water head, which significantly reduces the uncertainty items that contribute more to the original method. The frequency sampling method is improved based on the Froude's similarity criterion, which improves the accuracy level of the measurement results. The uncertainty of the measurement method is improved from 1.6% to 0.56%. The calibration experiments of the triangular thin-walled weir open-channel flowmeter are carried out by the standard meter method open-channel flow rate standard device, and the experimental results show that the measurement error is reduced from 2% to less than 1% after the improved method.
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Received: 26 December 2023
Published: 26 September 2024
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|
| ［18］ |
李军秀, 王一融, 常磊, 等. 自由出流状态下矩形薄壁堰流量公式的实验研究与理论分析［J］. 河西学院学报, 2022, 38(5):25-35.
|
| ［13］ |
汤李宁. 巴歇尔槽明渠流量计水位误差和流量误差测量不确定度的评定与表示［J］. 计量与测试技术, 2015, 42(5):63-66.
|
| ［14］ |
测量不确定度评定与表示:JJF 1059.1-2012［S］.
|
| ［16］ |
刘福国, 杨晨旭. 锅炉炉膛热负荷分布拟合算法研究［J］. 计量学报, 2014, 35(5):440-444.
|
|
ZHOU B. Application of Ultrasonic Open Channel Flowmeter in Wastewater Measurement ［J］. Sci Tech & Development of Enterprise, 2020(8):82-83.
|
| ［4］ |
次吉拉姆. 高寒地区三角形薄壁堰水力特性研究［D］. 拉萨:西藏大学, 2021.
|
| ［5］ |
徐玲君, 陈刚, 李国栋, 等. 薄壁堰泄流能力的数值模型计算及模拟自由水面的评价［J］. 西北农林科技大学学报, 2010, 38(1):225-230.
|
| ［7］ |
彭儒武, 张昕, 彭英慧. 矩形薄壁堰贴壁流水力学特性的试验研究［J］. 华北水利水电学院学报, 2012, 33(3):23-26.
|
| ［1］ |
周波. 超声波明渠流量计在污水计量中的应用［J］. 企业科技与发展, 2020(8):82-83.
|
|
WANG B,LIN Z P,CHEN H S. Error Analysis and Uncertainty Evaluation of Ultrasonic Open Channel Flowmeter in Parshall Flume［J］. Instrument Standardization and Metrology, 2022(6):25-27.
|
| ［3］ |
IMON P, ZBYNK Z. Discharge coefficient, effective head and limit head in the Kindsvater-Shen formula for small discharges measured by thin-plate weirs with a triangular notch［J］. Journal of Hydrology and Hydromechanics, 2023,71(1):35-48.
|
| ［6］ |
黄安多. 薄壁堰自由出流的试验研究［D］. 成都:西华大学, 2017.
|
| ［10］ |
赵伟国, 王成李, 朱炜, 等. 基于流速面积法的明渠流量测量不确定度评定［J］. 计量学报, 2015, 36(5):526-529.
|
|
MA Z Q, SHI E J, ZHANG P, et al. Evaluation and Expression of Uncertainty of Flowmeter in Open Channel of Parshall Flume［J］. Electronics Quality, 2019(9):21-23.
|
| ［2］ |
王标, 林焯鹏, 陈汉松. 巴歇尔槽超声明渠流量计误差分析及不确定度评定［J］. 仪器仪表标准化与计量, 2022(6):25-27.
|
|
XU L J, CHEN G, LI G D, et al. Numerical simulation about Rectangle Sharp-crested Weir and evaluation of free-surface ［J］. Journal of Northwest A＆F University, 2010,38(1):225-230.
|
|
PENG R W, ZHANG X, PENG Y H. Experimental Research on Hydraulic Characteristics of Wall Pressing Flow for Rectangle Sharp-crested Weir［J］. Journal of North China Institute of Water Conservancy and Hydroelectric Power,2012,33(3):23-26.
|
| ［9］ |
城市排水流堰槽测标准三角形薄壁堰:CJ/T 3008.1-1993［S］. 1993.
|
|
ZHAO W G,WANG C L, ZHU W, et al. Uncertainty Evaluation of Open-channel Discharges Measurement with the Velocity-area Method［J］. Acta Metrologica Sinica, 2015,36(5):526-529.
|
| ［12］ |
陈汉松, 赖森豪, 万勇, 等. 提升巴歇尔槽超声明渠流量计测量准确度的研究［J］. 计量技术, 2020(4):61-64.
|
|
HUANG S Y, WEI C X, ZHENG L H. Investigation of the Steady State Method for Thermal Conductivity Measurement and its Data Processing Method［J］. Acta Metrologica Sinica, 2023, 44(4):508-512.
|
|
LIU F G,YANG C X. Study on Radiant Heat Fluxes Fitting Algorithm in Furnace of Utility Boiler［J］. Acta Metrologica Sinica, 2014, 35(5):440-444.
|
|
LI J X, WANG Y R, CHANG L, et al. Experimental Study and Theoretical Analysis of Discharge Formulae for Free Flow over Rectangular Sharp-Crested Weirs［J］. Journal of Hexi University, 2022, 38(5):25-35.
|
| ［8］ |
明渠堰槽流量计(试行):JJG 711-1990［S］. 1990.
|
| ［11］ |
马振奇, 师恩洁, 张朋, 等. 巴歇尔槽明渠流量计不确定度的评定和表示［J］. 电子质量, 2019(9):21-23.
|
| ［15］ |
黄思俞, 魏炽旭, 郑联慧. 稳态法导热系数测量实验及数据处理方法的研究［J］. 计量学报, 2023,44(4):508-512.
|
| ［17］ |
王成李. 明渠流量测量方法及装置研究［D］. 杭州:中国计量学院, 2014.
|
| ［19］ |
MINOO SHARIFIPOUR, HOSSEIN BONAKDARI, AMIR HOSSEIN ZAJI, et al. Numerical investigation of flow field and flowmeter accuracy in open-channel junctions［J］. Engineering Applications of Computational Fluid Mechanics, 2015,9(1):280-290.
|
|
HU B, FENG X, ZHANG P. Design of on-line Calibrating Open Channel Flowmeter Device by the Master Meter Method［J］. Metrology & Measurement Technology, 2020, 40(2):54-57.
|
|
TAN L N. Flowmeter Parshall Tank Water Level and Flow Error Measurment Uncertainty and Representation［J］. Metrology & Measurement Technique, 2015, 42(5):63-66.
|
| ［20］ |
胡博, 冯鑫, 张朋. 标准表法明渠流量计在线校准装置的设计［J］. 计测技术, 2020, 40(2):54-57.
|
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2024, Vol. 45 
