The reproducibility of the results of a check of water flow meters

2009 ◽  
Vol 52 (6) ◽  
pp. 632-635 ◽  
Author(s):  
V. A. Vlasov
Keyword(s):  
Water Flow ◽  
Flow Meters

scholarly journals Development of a self-rechargeable digital water flow meter

2013 ◽  
Vol 15 (3) ◽  
pp. 888-896 ◽  
Author(s):  
Songhao Wang ◽  
Ronald Garcia
Keyword(s):  
Water Flow ◽  
Water Pressure ◽  
Communication Technologies ◽  
Turbine Generator ◽  
Flow Meter ◽  
Flow Meters ◽  
Pelton Turbine ◽  
Zigbee Technology ◽  
Diameter Pipe ◽  
Water Meters

The objective of this paper is to present the feasibility of a self-rechargeable digital water flow meter (SRDFM) system for water pipes using the latest data processing and wireless communication technologies while causing negligible water pressure drop (head loss). The system uses a Pelton turbine generator to power the electronic circuit, which processes and transmits the signals generated by several flow meters. ZigBee technology was used to process and send wireless signals. Signals from two water meters were acquired, processed, and transmitted with only one control/transmission unit during this study. The new system was assessed experimentally, reaching a maximum of 80 m of wireless transmittance distance at a minimum flow rate of 5 L/min for a 16-mm diameter pipe (self-charged).

scholarly journals ULTRASONIC METHODS AND INSTRUMENTS FOR MEASURING WATER FLOW IN HYDRORECLAMATION SYSTEMS

2020 ◽  
Author(s):  
A. P. Vasilchenko ◽  
◽  
A. M. Korenovskiy ◽  
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Flow Measurement ◽  
Cross Correlation ◽  
Accounting System ◽  
Pulse Time ◽  
Flow Meters ◽  
Drainage Systems ◽  
Ultrasonic Methods ◽  
Water Metering

Purpose: analysis of existing ultrasonic methods and devices for metering water flow in irrigation and drainage systems. The problem of rational use of water resources exists in all areas, including agriculture. It cannot be resolved without considering the issue of water metering and water distribution. The main task of the water accounting system in irrigation and drainage systems is measuring the volume of water taken from the water intake and delovered to the irrigation network. For these purposes, flow meters – devices that measure the flow of water, are used. Ultrasonic (acoustic) flow meters are flow meters capable of solving complex problems in flow measurement. Currently, there are several measurement methods to determine the water flow rate at reclamation facilities: ultrasonic, radar, Doppler method, cross-correlation method and Transit-Time method. Based on these methods, a large number of modifications of devices for determining water flow rates have been created: level gauges, radar flow meters, Doppler flow meters, submersible cross-correlation flow meters, pulse-time flow meters. Conclusions. Flow meters based on level gauges and radar flow meters are impractical to use in commercial water metering units. They have high flow measurement errors, since level gauges measure only the level, and the speed is taken as a constant value, while radar flow meters measure the flow rate, but this is not the speed of the entire flow, but only of the surface layer. The flow rate measured by Doppler and cross-correlation meters depends on the amount of solids in the flow. But since the water in canals and closed pipelines on irrigation and drainage systems has a large number of solids, these flow meters have a high accuracy of flow measurement. Pulse time meters, as well as Doppler and cross-correlation meters, have high measurement accuracy, but do not depend on the amount of solids in the flow.

Research on the Master Meter Method and Static Weight Method Flow Standard Device

2015 ◽  
Vol 738-739 ◽  
pp. 849-853
Author(s):  
Xue Qin
Keyword(s):  
Water Flow ◽  
Low Cost ◽  
Experimental Studies ◽  
Flow Meters ◽  
Standard Device ◽  
Unit Value ◽  
Weight Method ◽  
Design Requirements ◽  
Application Fields ◽  
Operation Status

Flow standard device not only is the reference and transferring of flow unit value, but also is widely used as experimental device .The research and application of it is an important link in the development of flow measurement and test technology. In view of the characteristics of industrial application fields, A set of "standard and combined" water flow device is researched and designed in the paper. The device will be static weight method and the standard meter method gives reasonable collocation from system scale and uncertainty synthesis, it can realize the verification and experimental studies of various velocity type flowmeter has the characteristics of high verification efficiency, low cost and high automation. More than flow meters have been calibrated on the device. It is confirmed by the operation status and the experimental data that every technology criterion has reached the design requirements, and it proved is reasonable to the design scheme about water flow standard device of master meter and static weight method.

Accuracy improvement of virtual pump water flow meters using calibrated characteristics curves at various frequencies

2019 ◽  
Vol 191 ◽  
pp. 143-150 ◽  
Author(s):  
Zufen Wang ◽  
Esber Andiroglu ◽  
Gang Wang ◽  
Li Song
Keyword(s):  
Water Flow ◽  
Accuracy Improvement ◽  
Flow Meters

The application of electronics to the study of animal behaviour

1990 ◽  
Vol 1990 ◽  
pp. 99-99
Author(s):  
A B Lawrence
Keyword(s):  
Electrical Activity ◽  
Water Flow ◽  
Water Use ◽  
Animal Behaviour ◽  
Related Activity ◽  
Flow Meters ◽  
Feeding Regime ◽  
Hanging Chain ◽  
Circadian Patterns ◽  
Piezo Electric

Animal behaviour is increasingly seen as a useful tool in animal production. However, behavioural observations are time costly, and it is difficult to ensure precision and repeatability of measurement.An alternative to observation is to use electronics to automatically record behaviour and two such applications are illustrated:The first system developed at Edinburgh records drinker and chain-related activity, two common abnormal behaviours in pregnant sows. Water flow meters record drinker use. Chain behaviour is monitored by supplying each sow with a vertically hanging chain to which is attached piezo-electric ‘wire’. Electrical activity is generated from the flow meter or the piezo-electric wire as the sow manipulates the drinker or the chain, and is read by a micro-computer at 60 seconds intervals. The system estimates water use and circadian patterns of drinker and chain activity for 16 sows. Applications include recording the development of these two behaviours in response to variations in variables such as feeding regime.

scholarly journals Self-Calibration of Ultrasonic Water Flow Meter

2019 ◽  
Vol 8 (4) ◽  
pp. 6011-6017
Keyword(s):  
Water Flow ◽  
Piecewise Linear ◽  
Calibration Procedure ◽  
Dynamical Characteristic ◽  
Flow Meter ◽  
Flow Measurements ◽  
Flow Meters ◽  
Flow Metering ◽  
Rf Communication ◽  
Fluid Properties

Due to fluid properties, flow patterns, external factors (temperature, pressure, etc.) measurement shows a dynamical characteristic. Therefore, calibration is an indispensable process in order to ensure the standards of flow metering. Ultrasonic flow meters, which are ameliorated the readings over time, are promising devices to minimize the flow measurements error. In this paper, the calibration procedure of a specific ultrasonic water flow meter is discussed, and then a wireless system is proposed to carry out fine calibration. According to the results, piecewise linear least squares approach supplies the best performance at overall volumetric flow rates accompanying with wireless fine calibration system based on RF communication

Uncertainty Evaluation of Flow Meter Calibration by Gravimetric Water Flow Standards at KRISS

2020 ◽  
Author(s):  
Sejong Chun ◽  
Byung-Ro Yoon
Keyword(s):  
Water Flow ◽  
Flow Measurement ◽  
Power Plants ◽  
Process Engineering ◽  
Large Capacity ◽  
Flow Meters ◽  
Measurement Standards ◽  
Electric Power Plants ◽  
The Republic ◽  
Better Than

Abstract Petrochemical and electric power plants are using flow meters, of which capacity is larger than 1000 m3/h. They require the accuracy of flow meters better than ±0.3% if the flow meters are being used for custody transfer or allocation measurement. However, the number of national metrology institutes, which can handle this issue, is very limited, including PTB (Germany), NMIJ/AIST (Japan), MIKES (Finland), CEESI-NIST (USA), and TÜV-NEL (UK). Large-capacity flow measurement standards are also needed to make better quality control for process engineering in the Republic of Korea. This study aims at establishing the water flow measurement standards up to 2000 m3/h with uncertainty better than 0.06%. How to evaluate the measurement uncertainty is discussed for establishing the large-capacity water flow standards at KRISS.

scholarly journals Implementation of Water Debit Measurement Using Microcontroller-Connected Flow Meters

TEM Journal ◽  
2020 ◽  
pp. 1467-1474
Author(s):  
Juhriyansyah Dalle ◽  
Muhammad Tamjidi ◽  
Syarif Yusirwan Syafruddin
Keyword(s):  
Data Collection ◽  
Water Flow ◽  
Flow Measurement ◽  
Successful Implementation ◽  
Time Data ◽  
Flow Meters ◽  
Software Analysis ◽  
Irrigation Flow ◽  
Real Time Data ◽  
Analysis Design

This research was conducted to measure water flow by implementing the Flow Meter tool. This was connected to a microcontroller and monitored through the website. In addition, the research was performed in stages, including (1) problem identification; (2) data collection; (3) hardware and software analysis, design, as well as website interfaces; (4) implementation and testing; and (5) concluding the development of hardware and software created. The results indicate the successful implementation of a water flow measurement prototype. This produced real-time data, updated every minute and displayed the required information on a website for direct monitoring. The study outcome is expected to be directly applied in dam or actual irrigation flow, and monitored on both website media and Android. Therefore, further research is required.

Effect of verapamil on cytoplasmic distribution of granules and microfilaments in amphibian urinary bladder

1988 ◽  
Vol 46 ◽  
pp. 324-325
Author(s):  
A.J. Mia ◽  
L.X. Oakford ◽  
T. Yorio
Keyword(s):  
Urinary Bladder ◽  
Water Flow ◽  
Morphological Changes ◽  
Granular Cell ◽  
Cytosolic Calcium ◽  
Calcium Storage ◽  
Amphibian Urinary Bladder ◽  
Vesicular Membrane ◽  
High Concentrations ◽  
Cytoskeletal System

The amphibian urinary bladder has been used as a ‘model’ system for studies of the mechanism of action of antidiuretic hormone (ADH) in stimulating transepithelial water flow. The increase in water permeability is accompanied by morphological changes that include the stimulation of apical microvilli, mobilization of microtubules and microfilaments and vesicular membrane fusion events . It has been shown that alterations in the cytosolic calcium concentrations can inhibit ADH transmembrane water flow and induce alterations in the epithelial cell cytomorphology, including the cytoskeletal system . Recently, the subapical granules of the granular cell in the amphibian urinary bladder have been shown to contain high concentrations of calcium, and it was suggested that these cytoplasmic constituents may act as calcium storage sites for intracellular calcium homeostasis. The present study utilizes the calcium antagonist, verapamil, to examine the effect of calcium deprivation on the cytomorphological features of epithelial cells from amphibian urinary bladder, with particular emphasis on subapical granule and microfilament distribution.

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