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Indicator of Thunderstorm
Studený, Pavel ; Sekora, Jiří (referee) ; Chmelař, Milan (advisor)
The aim of this Bachelor thesis is a theoretical analysis of thunderstorms, lightning and their detection. The theoretical description then gradually moving towards designing their own detector. The detector will operate so that when a lightning activity captures pulses which generate lightning. Lightning will register using the attached counter. After the storm could be due to information from the counters to evaluate how strong the storm was.
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The effect of operating position of the light source on the photometric parameters
Šťastný, Jakub ; Štěpánek, Jaroslav (referee) ; Škoda, Jan (advisor)
The theses discusses how operating position and ambient temperature affect electric light sources. For the purposes of this theses, the analysis of light radiation, the description and the principle of taking measurements of light quantities are included. The work also contains the principle of function, construction and parameters of light sources. For each light source a hypothesized impact of the operating position of the light source and the impact of ambient temperature variation on radiated luminous flux are stated. For selected light sources a measurement of the impact of the operating position on the sources’ photometric parameters was taken. The output measurement data are being compared to the theoretical hypotheses. The conclusion of the thesis describes suggested recommendations for the operation of light sources based on both theoretical and practical parts of the thesis.
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Simulation of electric field in the area of switchgear busbars
Müller, Michal ; Janda, Marcel (referee) ; Bušov, Bohuslav (advisor)
The aim of this work is to simulate the electric field in the space of busbar HV switchgear. More precisely, the aim is to find a place with the most critical value of the electric field, the design of measures to reduce the size of the field at this point. The simulation was performed using the finite element method program. The simulation found the most critical area. Using the basic physical principles it has been proposed solution. This solution reduced twice the magnitude the electric field in this area.
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Comparison of lightning detection networks over Czechia
Pacovská, Lucie ; Popová, Jana (advisor) ; Müller, Miloslav (referee)
This thesis focuses on ground-based lightning detection which is important since lightning discharges still cause casualties yearly worldwide. The thesis provides description of several ground-based lightning detection networks and an analysis of lightning data of three lightning detection networks covering the Czech Republic during 2015 - 2021. Specifically, the data of the World Wide Lightning Location Network (WWLLN), the amateur network Blitzortung and the European network EUropean Cooperation for LIghtning Detection (EUCLID) are investigated. The thesis examines the spatial and temporal characteristics of lightning discharges from the three detection networks, the relationship between lightning discharges and land cover from CORINE Land Cover data, and the relationship of lightning discharges with types of weather situations based on the Czech Hydrometeorological Institute (CHMI) data. The results show that there is not much difference in the temporal and spatial characteristics of lightning discharges among the three detection networks. The relationship between lightning activity and land cover is the same for the three networks. Unlike the relationship between lightning activity and land cover, the relationship between lightning activity and weather types is in good agreement among the...
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Analysis and use of wire cutting technology
Patočka, Josef ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
The diploma thesis focuses on the topic of electroerosive machining with greater emphasis on wire cutting technique. The first part clearly describes the principle of electroerosive discharge and its subsequent effects that cause material removal in the given working conditions. This includes the individual methods of electroerosion and the individual accessories that aid the process. The second part is a theoretical analysis of the cutting process using a wire electrode. It describes the machining method, machining strategy and a complete overview of the accessories that accompany the cutting process. The third part of the thesis includes a practical demonstration of the production of a typical representative for wire cutting and then there is evaluation from an economic point of view. Furthermore, there is clear analysis of the surface quality and the final evaluation of the condition of the component.
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Study of plasma discharge effect on distilled water pH
KOBRLE, Lukáš
This tesis is concerned with the influence of Gliding arc plasma discharge on the pH of distilled water while using different treatment time and distance between Gliding arc and the surface of distilled water. The theoretical part consists of research into various studies, whose main focus is the practical usage of Gliding arc and the possibilities of its use. The practical part contains the values of the measured quantities, models and graphs illustrating the effects of the process. The conclusion offers a brief summary of the findings and claims, whose correctness needs to be verified in further studies.
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