Browsing by Subject "gamma ray tomography"

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Access status: Open Access ,
Multimodality measurement data fusion in image reconstruction for multiphase flow measurements
(Wydawnictwa AGH, 2010) Nowakowski, Jacek; Hammer, Erling; Sankowski, Dominik; Styra, Darius; Wajman, Radosław; Banasiak, Robert; Romanowski, Andrzej
The multiphase flow measurements are very important tasks in many areas of industrial processes applications. The image reconstruction algorithms allow to visualize cross section of a flow (2D) reconstruction or 3D volumetric reconstruction. In many industrial applications for process control it is not necessary to perform image reconstruction resulting high-resolution image. The main goal is to offer method of accurate measurement and precise and robust calculation algorithm leading to phase fraction calculation. The submitted paper presents results of theoretical research and experiments performed both in the University in Lodz and University of Bergen using installed there multi phase flow rig. The paper shows possibilities of applying both image reconstruction algorithms for data obtained from electrical impedance and capacitance tomography and combining it with data obtained simultaneously from gamma sensors. The experiments showed applicability of assumed approach and good concordance of data obtained from measurements with real parameters of a flow.
Access status: Open Access ,
New concept of ECT/ERT/GRT tomography for multiphase flow measurements
(Wydawnictwa AGH, 2010) Nowakowski, Jacek; Hammer, Erling; Sankowski, Dominik; Styra, Darius; Wajman, Radosław; Banasiak, Robert; Romanowski, Andrzej
The multiphase flow measurements are very important tasks in many areas of industrial processes applications. One of them is undersea exploration of oil in the petroleum industry. The submitted paper presents application of multi modality: capacitance, impedance and gamma ray tomography for performing measurements of a flow composed of sea water, oil and gas flow, theoretical principles applied to design multimodality tomograph and results of experiments performed in University of Bergen. The experiments were done using ECRT tomograph designed and built in Technical University of Lodz and combined measurements of signals acquired from all measuring modalities. Measurement confirmed that multi modality approach allows to give fast and reliable on-line results of measurements of composition of multi phase flow. Applied algorithm allowed to speed up on-line measurements and presented results in a form required in industrial applications. The derived conclusions can be used as a guidelines for preparation of industrial applicable construction of tomograph.