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Support system for administration and control of FSO transceiver
Janík, Lukáš ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
Tato práce se zabývá problematikou optických bezkabelových spojů (FSO). V úvodní kapitole jsou diskutovány přednosti, základní principy a dílčí komponenty FSO spojů. Druhá kapitola se zabývá atmosférou z pohledu šířícího se optického svazku, jejím složením, základními veličinami a jevy v ní nastávajícími. V následující kapitole je popsáno několik metod ke zmírnění jevů majících negativní vliv na kvalitu spoje. Druhá část práce se zabývá návrhem podpůrného systému pro FSO, založeném na softcore mikroprocesoru MicroBlaze, návrhem jednoduchého síťového přepínače a síťového rozhraní. Závěr práce pojednává o implementaci webového serveru a tvorbě webové prezentace umožňující vzdálenou správu FSO a jeho komponent.
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Laser transmitter with fiber
Hašek, Jaroslav ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
This master´s thesis deals with communication which is provided by optical devices. Optical wireless links are enforced due to high bit rate, responsibility and noise immunity. Main part of this master´s project is devoted to optical fibre, its characteristic and its usage in laser transmitter.
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Measurement of the optical intensity distribution at the far field
Vitásek, Jan ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
The topic of this master’s thesis is energy measurement of the optical intensity distribu-tion at the far field. Properties of the optical intensity and the optical power are described. In this thesis solution of wave equation is done. The plane wave, spherical wave and Gaussian beam are described. In this thesis, optical trace of laser beam from transmitter laser diode to receiver PIN photodiode is described. One of the solved problems is diffraction on the lens socket. The basic configuration for diffraction investigation on lens socket was created. There were transmitting laser diode, stop with circular apertures and PIN photodiode used in the experiment. In the other part, thesis deals with measuring and detection of the optical beam. Sorts of photodiodes and their characteristics were analysed.
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Human detection using laser rangefinder
Němeček, Jakub ; Selingerová, Simona (referee) ; Krejsa, Jiří (advisor)
This thesis describe dynamic obstacle detection and move tracking. Detection is based on laser rangefinder data. Tracking is based on compare two scans. Algorithm of localization method is processed in Matlab. In Matlab is also made simulation of scanned data. Filter parameters are tested and optimalized on this data.
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Maintenance system of a manufacturing line
Němeček, Jakub ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
This thesis deals with the design of a new maintenance system of a powder coating line at ABB. The theoretical part describes history of maintenance, used maintenance methods, and types of organizational structure. The practical part describes the current state of maintenance of the production line, analysis of the situation, and subsequently design of the new maintenance system.
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Radiation pattern shaping of the optical transmitter
Csonka, Gábor ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
This work deals with questions of space assembling of several optics beams. There are mentioned the base features and values of space distribution of beam intensity in laser beam. The forms of diffusion of space localized light that is described by beam optics. There is a characterization of Gaussian beam, and diffraction of several beams. There is mentioned a simulation an assembling of two and more beams. It contains model of assembling incoherent beams. The work also includes suggestion of final layout of laser beams, which form optical transmitter with radiating characteristics, resistant to defects evoked by atmosphere.
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Design of fixed-wing UAV autopilot
Němeček, Jakub ; Růžička, Michal (referee) ; Krejsa, Jiří (advisor)
This thesis describe approaches for autopilots for small unmanned aerial vehicles. Part of thesis is implementation of autopilot in Matlab/Simulink. The goal is to control computation model of the aircraft. Main part of thesis desribes high layer of control and navigation with focus on trajectory planning. Final algorithm is based on following the reference point between the aircraft and waypoint. Algorithm solves special positions of waypoints and error flag.
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Power Budget of the Laser Rangefinder
Kotol, Martin ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
The thesis analyzes the optical laser range finders in real propagation environments. Itdescribes the various parts of optical laser range finders their properties and principles in relation to their performance balance. The paper presents the basic optical properties of lenses used in the transmitter and receiver. A separate chapter is devoted to the transit time method and factors influencing the measurement. The proportional directional reflectance analysisis a part of the thesis. In conclusion, the thesis contains the practical laboratory measurements of the relative directional reflectance of different materials and colors, and verification of the power level diagram.
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Multicopter - dynamical model
Musil, Filip ; Němeček, Jakub (referee) ; Kraus, David (advisor)
Bachelor's thesis Multicopter - dynamic model deals with basic principles of multicopter flight and determining the position in space. Next part of the thesis is dedicated to the search of possible methods of compilation of dynamic model and implementation in Matlab/Simulink environment. The aim of this work is compilation of simplified dynamic model of multicopter which aims approximate real behavior in space.
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