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.

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.

PC Controlled Function Generator Using Direct Digital Synthesis (DDS) Technology For Electrical Capacitance Tomography

2012 ◽  
Author(s):  
Ruzairi Abdul Rahim ◽  
Chin Heng Teo ◽  
S. Sulaiman ◽  
M. S. Abdul Manaf
Keyword(s):  
Flow System ◽  
Sine Wave ◽  
High Accuracy ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Direct Digital Synthesis ◽  
Function Generator ◽  
Tomography System ◽  
Digital Synthesis ◽  
Capacitance Tomography

Penjana frekuensi telah digunakan secara meluas dalam pelbagai jenis ujikaji. Ia digunakan untuk menjana pelbagai bentuk gelombang (gelombang sin, gelombang segiempat dll) pada frekuensi dan lebar jalur tertentu. Satu daripada aplikasinya ialah dalam Proses Tomografi jenis Kapasitif (ECT) di mana ia digunakan untuk menyalurkan maklumat mengenai keadaan aliran. Kertas kerja ini menjelaskan bagaimana mereka bentuk sebuah Penjana Fungsi yang Dikawal oleh Komputer Peribadi yang ekonomi untuk kegunaan ujikaji makmal. Rekaan ini berbeza dengan penjana fungsi manual kerana ia hendaklah dikawal secara digital. Dalam kes ini, teknologi DDS (Direct Digital Synthesis) digunakan kerana cip DDS adalah digital secara semulajadinya. Analisis telah dibuat untuk memeriksa ketepatan keluaran fungsi dari segi frekuensi dan amplitudnya. Kata kunci: Penjana frekuensi, sintesis secara terus (DDS) A function generator is widely used for experimental work and testing to generate various types of waveform (sine, square, triangle, etc) with a particular frequency bandwidth. One of its applications is in generating waveform for the ECT (Electrical Capacitance Tomography) system. ECT is used to retrieve the details of material in a flow system. An economical PC Controlled Function Generator was designed for the use of waveform generating in ECT. For the ECT system, high accuracy and frequency waveforms are needed. Three basic waveforms are required; the sine wave, square wave, and triangular wave. The objective is to build a function generator which is capable of generating high accuracy waveforms with acceptable distortion and stability. An interfacing system between a PC and the function generator was also selected and developed with the purpose of producing accurate amplitude and frequency of the waveforms. This interfacing allows remote control to the function generator for a wider usage. Key words: Function generator, direct digital synthesis (DDS)

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.

DESIGN OF FLEXIBLE ELECTRICAL CAPACITANCE TOMOGRAPHY SENSOR

2015 ◽  
Vol 77 (28) ◽  
Author(s):  
MT Masturah ◽  
MHF Rahiman ◽  
Zulkarnay Zakaria ◽  
AR Rahim ◽  
NM Ayob
Keyword(s):  
Outer Layer ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Capacitance Tomography ◽  
Fluid Imaging

This paper discussed the design–functionality and application of Flexible Electrical Capacitance Tomography sensor (FlexiECT). The sensors consist of 12 electrodes allocated surrounding the outer layer of the pipeline. The sensor is designed in such that the flexibility features suit the applications in the pipeline of multiple size. This paper also discussed the preliminary result of FlexiECT applications in fluid imaging by identifying the percentage of two mixing fluids.

Dynamic water fill level measurement using a phantom-dependent adaptive electrical capacitance tomography (ECT) method

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Christoph Kandlbinder-Paret ◽  
Alice Fischerauer ◽  
Gerhard Fischerauer
Keyword(s):  
Pipe Wall ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Capacitance Measurements ◽  
Level Measurement ◽  
Element Simulation ◽  
Fill Level ◽  
Capacitance Tomography ◽  
Low Permittivity ◽  
Adaptation Scheme

Abstract In electrical capacitance tomography (ECT), the resolution of the reconstructed permittivity distribution improves with the number of electrodes used whereas the number of capacitance measurements and the measurement time increases with the number of electrodes. To cope with this tradeoff, we present a phantom-dependent adaptation scheme in which coarse measurements are performed with terminal electrodes interconnected to form a synthetic electrode ring with fewer but larger electrodes. The concept was tested by observing the sloshing of water inside a pipe. We compare the reconstructed results based on eight synthetic electrodes, on 16 elementary electrodes, and on the adaptation scheme involving both the eight synthetic electrodes and some of the elementary capacitances. The reconstruction used the projected Landweber algorithm for capacitances determined by a finite-element simulation and for measured capacitances. The results contain artefacts attributed to the influence of the high permittivity of water compared to the low permittivity of the pipe wall. The adaptation scheme leads to nearly the same information as a full measurement of all 120 elementary capacitances but only requires the measurement of 30 % fewer capacitances. By detecting the fill level using a tomometric method, it can be determined within an uncertainty of 5 % FS.

Sign in / Sign up

Export Citation Format

Share Document