Wydział Elektrotechniki, Elektroniki, Informatyki i Automatyki / Faculty of Electrical, Electronic, Computer and Control Engineering / W2
Stały URI zbioruhttp://hdl.handle.net/11652/2
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Pozycja Silo emptying in aspect of the non-desctructive detection methods application(Wydawnictwo Politechniki Łódzkiej, 2009) Niedostatkiewicz, Maciej; Chaniecki, Zbigniew; Sankowski, DominikThe paper presents results of concentration measurements in non-cohesive sand during free flow in rectangular and cylindrical silos using different non-invasive methods like thermography, X-ray photography, X-ray tomography and electrical capacitance tomography. The effect of the initial bulk solid density and roughness of silo walls on the concentration changes were investigated. Advantages and disadvantages of all presented methods were outlined. The possibility of application of the Electrical Capacitance Tomography (ECT) for observation the porosity changes of the bulk solid was pointed out.Pozycja Measurement of dynamic pulsations in bulk solid during silo discharging using ECT method(Wydawnictwo Politechniki Łódzkiej, 2009) Grudzień, Krzysztof; Chaniecki, Zbigniew; Niedostatkiewicz, Maciej; Romanowski, Andrzej; Sankowski, DominikPaper will focus on the results of tests with the slender cylindrical silo emptied both gravitationally and in controlled manner. The influence of the initial density, wall roughness, height and velocity on the emptying process will be presented. During tests values of the vertical and horizontal accelerations on the silo wall were measured, the effect of the outlet velocity and level of the dynamic effects were compared. Results will be presented in the form of continuous graphs, which allow to analyse the entire process in simpler way comparing to tomographic images form. It is a better form of presentation in order to work out settings for process control, as well.Pozycja Monitoring of solids behaviour during gravitional flow in rectangular silo(Wydawnictwo Politechniki Łódzkiej, 2009) Niedostatkiewicz, Maciej; Chaniecki, Zbigniew; Grudzień, Krzysztof; Romanowski, Andrzej; Banasiak, Robert; Betiuk, JakubThis paper is focused on the application of Electrical Capacitance Tomography (ECT) to gravitational flow of bulk solid in rectangular silo investigation. In order to measure the materials distribution inside a vessel, a dedicated, spatial 16 electrode sensor is designed. Reconstructed images are presented in 3D domain space. The investigated silo model consists of rectangular bin and a cone-like hopper section. The flow behaviour of material (friable sand) is studied for two silo model configurations having different lower section slopes. The slope angle is a silo geometrical parameter affecting the type of the flow regime - mass or funnel type.