Uncovering Artifacts of Flow Measurement Tools

2009 ◽  
pp. 187-196 ◽  
Author(s):  
Ítalo Cunha ◽  
Fernando Silveira ◽  
Ricardo Oliveira ◽  
Renata Teixeira ◽  
Christophe Diot
Keyword(s):  
Flow Measurement ◽  
Measurement Tools

METHODS AND DEVICES FOR TEMPERATURE COMPENSATION IN GAS FLOW METERS

2021 ◽  
Author(s):  
Жанна Артуровна Сухинец ◽  
Ольга Олеговна Валямова ◽  
Артур Игоревич Гулин
Keyword(s):  
Output Signal ◽  
Temperature Compensation ◽  
Flow Measurement ◽  
Gas Flow ◽  
Thermal Compensation ◽  
Flow Meters ◽  
Compensation Methods ◽  
Measurement Tools ◽  
Electronic Compensation

В статье рассмотрены типы средств измерения расхода газа, проведен анализ особенностей методов термокомпенсации и вопросов коррекции выходного сигнала расходомеров по температуре с помощью механических и электронных устройств компенсации. The article discusses the types of gas flow measurement tools, analyzes the features of thermal compensation methods and issues of correcting the output signal of flow meters by temperature using mechanical and electronic compensation devices.

Valuable group therapy measurement tools

2008 ◽  
Author(s):  
Liz Baker ◽  
Gary M. Burlingame ◽  
Jonathan Cox ◽  
Robert Gleave
Keyword(s):  
Group Therapy ◽  
Measurement Tools

Blast furnace tapping flow measurement

1991 ◽  
Vol 88 (9) ◽  
pp. 905-911
Author(s):  
C.A.A. Jonker ◽  
J. Vermeij
Keyword(s):  
Blast Furnace ◽  
Flow Measurement

Structured methods for improving flow measurement accuracy in pipelines

2020 ◽  
pp. 30-35
Author(s):  
Gurami N. Akhobadze
Keyword(s):  
Flow Measurement ◽  
Measurement Accuracy ◽  
Directional Coupler ◽  
Signal To Noise Ratio ◽  
Scattered Wave ◽  
Orthogonal Polarization ◽  
Flow Sensors ◽  
Information Signal ◽  
Mass Flows ◽  
Processing Device

In the age of digital transformation of production processes in industry and science the development and design of intelligent flow sensors for granular and liquid substances transferring through pipelines becomes more important. With this in view new approaches for improving the accuracy of microwave flowmeters are proposed. Taking into account the characteristics ofelectromagnetic waves propagating through a pipeline, a wave scattered by inhomogeneities of the controlled medium is analyzed. Features of the transformation of the polarized scattered wave limiting the geometric dimensions of the pipeline and optimizing the values of the useful scattered signal are revealed. Expediency of collection of the information signal with orthogonal polarization of the scattered wave and through a directional coupler is substantiated. The method of estimating the measurement accuracy with reference to the signal-to-noise ratio at the input of the processing device is given. The research results can be used in cryogenic machine engineering to measure volume and mass flows of liquid cryogenic products.

Investigation of the influence of the flow structure on the accuracy of flow measurement before a hydrometric structure in an open channel

2020 ◽  
pp. 41-44
Author(s):  
Anatoly Kusher
Keyword(s):  
Velocity Profile ◽  
Flow Velocity ◽  
Water Flow ◽  
Flow Measurement ◽  
Water Discharge ◽  
Critical Depth ◽  
Flow Measurements ◽  
Study Results ◽  
Flow Velocity Profile ◽  
Upstream Flow

The reliability of water flow measurement in irrigational canals depends on the measurement method and design features of the flow-measuring structure and the upstream flow velocity profile. The flow velocity profile is a function of the channel geometry and wall roughness. The article presents the study results of the influence of the upstream flow velocity profile on the discharge measurement accuracy. For this, the physical and numerical modeling of two structures was carried out: a critical depth flume and a hydrometric overfall in a rectangular channel. According to the data of numerical simulation of the critical depth flume with a uniform and parabolic (1/7) velocity profile in the upstream channel, the values of water discharge differ very little from the experimental values in the laboratory model with a similar geometry (δ < 2 %). In contrast to the critical depth flume, a change in the velocity profile only due to an increase in the height of the bottom roughness by 3 mm causes a decrease of the overfall discharge coefficient by 4…5 %. According to the results of the numerical and physical modeling, it was found that an increase of backwater by hydrometric structure reduces the influence of the upstream flow velocity profile and increases the reliability of water flow measurements.

MEASUREMENT OF BLOOD FLOW WITH FREELY DIFFUSIBLE INDICATORS AS INERT GASES, ANTIPYRINE, LABELLED WATER AND RUBIDIUM

1972 ◽  
Vol 68 (2_Supplb) ◽  
pp. S95-S111 ◽  
Author(s):  
Niels A. Lassen ◽  
Ole Andrée Larsen
Keyword(s):  
Blood Flow ◽  
Flow Measurement ◽  
Capillary Wall ◽  
Inert Gases ◽  
Tissue Blood Flow ◽  
Blood Flow Measurement

ABSTRACT Indicators which freely cross the capillary wall can be used for measurement of tissue blood flow in many different ways. Basically one can distinguish two categories of methods, viz. the ones where the indicator enters the tissue via the inflowing blood and the ones where the indicator is deposited locally in the tissue. The most important methods are briefly described with special emphasis on the theory of blood flow measurement.

Heat Flow Measurement by Force and Thermal Sensor Stick with Nerve-net LSI Chip

2019 ◽  
Vol 139 (8) ◽  
pp. 258-264
Author(s):  
Hayato Tsuchiya ◽  
Yusuke Suganuma ◽  
Masanori Muroyama ◽  
Takahiro Nakayama ◽  
Yutaka Nonomura
Keyword(s):  
Heat Flow ◽  
Flow Measurement ◽  
Thermal Sensor ◽  
Nerve Net
Sign in / Sign up

Export Citation Format

Share Document