A radar flow meter for automatic measurement of open channel flow

【Objective】The radar flow meter utilizes electromagnetic waves to measure water velocity, offering an efficient, non-invasive method for water flow measurement. In this paper, we experimentally investigates its feasibility for automatically measuring the cross-section flow in open channels, in attem...

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Bibliographic Details
Published inGuanʻgai paishui xuebao Vol. 44; no. 2; pp. 55 - 62
Main Authors LI Yincai, LI Bin, LI Wei, YIN Wenbin, HAN Wei, WU Xiaolei
Format Journal Article
LanguageChinese
Published Science Press 01.02.2025
Subjects
radar speed measurement; smooth flow open channels; automatic flow measurement; velocity coefficient; accuracy analysis
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Summary:【Objective】The radar flow meter utilizes electromagnetic waves to measure water velocity, offering an efficient, non-invasive method for water flow measurement. In this paper, we experimentally investigates its feasibility for automatically measuring the cross-section flow in open channels, in attempts to improve water resource allocation and support intelligent, precision-based water-saving irrigation systems.【Method】The velocity-area method was used in the experiment, where the radar velocimeters were installed at the heights of 2.1 m and 4.7 m above the canal bottom on a rigid truss bridge. The equipment automatically measured surface velocity and midstream depth. A mathematical model was developed to calculate the cross-sectional area and flow rate based on these measurements. The calculated flow rates were compared with those obtained from an electromagnetic flowmeter installed in a 600 m outlet pipe, upstream of the section.【Result】Comparison between flow rates measured by the radar flow meter and the e
ISSN:1672-3317