scholarly journals Plug Regime Flow Velocity Measurement Problem Based on Correlability Notion and Twin Plane Electrical Capacitance Tomography: Use Case

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2189
Author(s):  
Volodymyr Mosorov ◽  
Grzegorz Rybak ◽  
Dominik Sankowski
Keyword(s):  
Flow Velocity ◽  
Velocity Measurement ◽  
Measurement Problem ◽  
Correlation Method ◽  
Twin Plane ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Original Algorithm ◽  
Flow Velocity Measurement ◽  
Capacitance Tomography

In this paper, the authors present the flow velocity measurement based on twin plane sensor electrical capacitance tomography and the cross-correlation method. It is shown that such a technique has a significant restriction for its use, particularly for the plug regime of a flow. The major issue is with the irregular regime of the flow when portions of propagated material appear in different time moments. Thus, the requirement of correlability of analyzed input signal patterns should be met. Therefore, the checking of the correlability should be considered by such a technique. The article presents a study of the efficiency of the original algorithm of automatic extraction of the suitable signal patterns which has been recently proposed, to calculate flow velocity. The obtained results allow for choosing in practice the required parameters of the algorithm to correct the extraction of signal patterns in a proper and accurate way. Various examples of the application of the discussed algorithm were presented, along with the analysis of the influence of the parameters used on the quality of plugs identification and determination of material flow.

scholarly journals Improvement of Flow Velocity Measurement Algorithms Based on Correlation Function and Twin Plane Electrical Capacitance Tomography

Sensors ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 306 ◽  
Author(s):  
Volodymyr Mosorov ◽  
Marcin Zych ◽  
Robert Hanus ◽  
Dominik Sankowski ◽  
Ayoub Saoud
Keyword(s):  
Flow Velocity ◽  
Velocity Measurement ◽  
Input Data ◽  
Correlation Method ◽  
Time Delay Estimation ◽  
Electrical Tomography ◽  
Time Intervals ◽  
Original Algorithm ◽  
Flow Velocity Measurement ◽  
Capacitance Tomography

This article discusses the correlation method for time delay estimation, its disadvantages, and drawbacks. It is shown that the correlation method for material velocity measurement based on images of instantaneous changes of the concentration material inside measured by twin planes electrical tomography has serious limitations, especially in the case of plug regime. The basic problem is the non-stationarity of measured data, therefore the requirement of correlability of input data should be fulfilled. The requirement correlatability of input data imposes limitations on the possibility of continuous velocity measurement. This means that the material velocity can only be calculated when data are correlatable. An original algorithm of automatic extraction of the suitable time intervals to calculate material velocity is proposed. The algorithm allows measuring the flow velocity in a proper and accurate way. The examples of the correct velocity calculation, using the proposed concept for the gas-solid flow regime, are presented.

scholarly journals FLOW VELOCITY MEASUREMENT METHODS USING ELECTRICAL CAPACITANCE TOMOGRAPHY

2017 ◽  
Vol 7 (1) ◽  
pp. 30-36 ◽  
Author(s):  
Volodymyr Mosorov ◽  
Krzysztof Grudzień ◽  
Dominik Sankowski
Keyword(s):  
Flow Velocity ◽  
Velocity Measurement ◽  
Measurement Methods ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Industrial Installation ◽  
Advantages And Disadvantages ◽  
Theoretical Assumptions ◽  
Flow Velocity Measurement ◽  
Capacitance Tomography

The current methods of calculating the velocity field based on a twin-plane electrical capacitance system for multiphase flows are presented. The described methods allow to calculate the velocity profile of the multiphase flow in cross-section of industrial installation. The theoretical assumptions of the considered methods are also noticed. The main advantages and disadvantages of the authors’ flow velocity measurement methods are discussed.

The Measurement of Flow Rate in Mud Transporting Base on Cross-Correlation Method

2014 ◽  
Vol 687-691 ◽  
pp. 984-989
Author(s):  
Pan Jiang ◽  
Shi Dong Fan ◽  
Quan Wen
Keyword(s):  
Flow Velocity ◽  
Flow Rate ◽  
Cross Correlation ◽  
Correlation Method ◽  
Capacitive Sensor ◽  
High Accuracy ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Actual Measurement ◽  
Capacitance Tomography

The paper using electrical capacitance tomography to test the flow velocity and flow rate of the mud transporting in the dredging.The testing process based on two 12 electrodes capacitive sensor sets (ie,the upstream and downstream sensors).The computer can gather the capacitance signals from the upstream and downstream sensor,then by the method of cross-correlation method it can calculate the flow velocity and flow rate of the mud in the slurry pipelines.In oader to verify the measurement error,the system measure the flow velocity and flow rate of the mud in the same situation at the different time (including five different time).Comparing the results of related calculations and the actual measurement it can prove that the cross-relation method is feasible and reliable,the tesing result have high accuracy.

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