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Definition of the Method for Measurement of Bulk Materials Geometry on the Stockyards
Nešpor, Tomáš ; MIP,, Jiří Slovák, (referee) ; Polsterová, Helena (advisor)
This thesis is concerning about measurement of bulk materials geometry on the stockyards. In the first part of the document is summarized basic allocation of stockyard types, stockyards architecture and methods of bulk materials stacking. Furthermore there are allocated particular stacking and recovering technologies of bulk materials on the stockyards. The experimental part of the thesis is concerning about introduction to measurement of bulk materials geometry and its state consequently selection and description of measurement devices intended to forenamed purpose. The experimental part of the thesis is dedicated to determination of algorithms for measured data processing on a combined stacker/reclaimer machine; consequently it is dedicated to software equipment of data gathering PLC system. At the last part of the thesis a description of designed input data simulation and visualization which displays gathered data by PLC system are stated.
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Influence of the Temperature on the Dielectric properties epoxy with ground mica
Ráček, Tomáš ; Havlíček, Svatopluk (referee) ; Polsterová, Helena (advisor)
The paper is focused on theoretical analysis of the basic characteristics of dielectrics, especially on the examination of these qualities at samples of epoxy sealing compound filled with powder mica, and their dependance on the temperature and the content of filling in the material. The measured quantities are inner resistivity, relative permitivity, and loss factor. The paper also deals with the sensitivity of the material to humidity, and through the influence of humidity to the other measured quantities.
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System design of data collection for control system longitudinal dump coal
Skalský, Jakub ; Amsoft, Jiří Uherek, (referee) ; Polsterová, Helena (advisor)
The diploma dissertation deals with description and division of technologies of coal storage yards. A content of it is classification of individual storages thoroughly divided according to their feature. It introduces with measuring equipment used while solving diploma dissertation. Is incorporated herein by a description of the PLC including a description of each associated modules. Further there is clearly mentioned specification of needed data that is necessary to scan for control system of the storage. Within the diploma dissertation was created electrical system documentation data of collection control systems for longitudinal landfill with two universal machines.
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Research of Static Electricity Meters Reliability
Voborník, Petr ; Polsterová, Helena (referee) ; Szendiuch, Ivan (advisor)
This work deals with setting of dependability of static electricity meters. The first two chapters deal about electricity meters and dependability in general than there are introduced three possible ways for getting dependability parameters. The first methode is data collection from the field. The second methode is reliability prediction from component's reliability. The third methode is aging life tests. Conclusion contains evaluation of results and highligting of importance for practical usage.
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Study of electric properties of nanocomposites
Libra, Miroslav ; Rozsívalová, Zdenka (referee) ; Polsterová, Helena (advisor)
The present master´s thesis deals with the electrical properties of nanocomposite materials. Samples for the experiment are made epoxi resin and oxides TiO2 and Al2O3 as nanofillers in different percent performace. The samples nanocomposites are measured temperature dependence of the resistivity inside, dissipation factor and relative permittivity. It discusses the effect of the filler on the resulting electrical properties of the polymer.
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System design of data collection for control system longitudinal dump coal
Skalský, Jakub ; Amsoft, Jiří Uherek, (referee) ; Polsterová, Helena (advisor)
The diploma dissertation deals with description and division of technologies of coal storage yards. A content of it is classification of individual storages thoroughly divided according to their feature. It introduces with measuring equipment used while solving diploma dissertation. Is incorporated herein by a description of the PLC including a description of each associated modules. Further there is clearly mentioned specification of needed data that is necessary to scan for control system of the storage. Within the diploma dissertation was created electrical system documentation data of collection control systems for longitudinal landfill with two universal machines.
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Study of electrical properties of nanocomposites
Ovsík, Jiří ; Rozsívalová, Zdenka (referee) ; Polsterová, Helena (advisor)
The present work deals with the electrical properties of nanocomposite materials. Samples for the experiment are made of epoxy resin as a matrix and oxides TiO2, Al2O3, WO3, SiO2 as nanofillers in 0.5 and 1 percent performance. The experimental samples are measured in temperature and frequency dependence of relative permittivity, dissipation factor, rezistivity and are broken down by the influence of filler on the electrical properties of the polymer. Attention is also paid to the mechanical properties of nanocomposites.
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