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Control system for lasertag weapon
Svozil, Martin ; Kubíček, Michal (referee) ; Šebesta, Jiří (advisor)
This thesis describes the design of equipment for Lasertag. The proposal is designed in cooperation with other collaborators on the project. This work is focused on gun unit and its components. The whole system will be implemented using the microcontroller, which subsequently controls the entire system with its components. The work should be implemented and tested to the thesis.
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DC-AC converter 12 V / 230 V for car applications
Jezerčák, Martin ; Šebesta, Jiří (referee) ; Brančík, Lubomír (advisor)
This work deals with a proposal for increasing DC/AC inverter for use in cars to power electronic devices on 230 V. This work is divided into two parts, theoretical and practical. It consists of three chapters. In the first chapter I developed a voltage converter, its breakdown, a breakdown by function, and the usage of individual connections. The proposal converter with the integrated circuit IR2153 is described in the second chapter. In the third chapter I processed readings and I visualized graphical dependencies of converter that was produced and purchased.
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Exhaustion control system
Bršel, Boris ; Šebesta, Jiří (referee) ; Fedra, Zbyněk (advisor)
Topic for my bachelor’s thesis is control system of exhaustion for wood industry. It´s very comprehensive issue, and since I am without bigger experience in this division I have chosen to create easier model of exhaustion system. I would like to continue in this project in master´s thesis too. My thesis consists in description the requisites for system like this, draft of the making and also practical making for joinery manufactory. I have decided control the parts of system by microcontrollers, which communicate with each other wireless and also decide about activity of parts of system of exhaustion in workshop like this. The role of this thesis was also to compare achieved results with other possibilities of control of exhaustion from the economic and technological site too.
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Measuring the velocity of projectiles by laser beam
Šmerda, Jaroslav ; Šebesta, Jiří (referee) ; Lukeš, Zbyněk (advisor)
Muzzle velocity is the speed of bullets, guns at the moment it leaves the barrel of a gun. Since this is a parameter related to the storyline, which takes place only shortly after the bullet leaves the barrel, this figure is the transition ballistics. The aim of this work is to design and construct a device for measuring the speed. Measurement consists in measuring the interval at which the bullet crosses the two laser beams. From this data, the performance will be calculated.
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Synchronization of measuring devices by optical fibres
Petr, Ondřej ; Šebesta, Jiří (referee) ; Dřínovský, Jiří (advisor)
The aim of this work was to get acquainted with the possibility of transmission of RF signals using optical cables. And design synchronization modules to transmit the reference signal, so that the source and the receiver of the signal are time-synchronized and mutually galvanically separated using optical cable. To transmit and receive optical signals through optical fiber, I chose the transmitter and receiver of the series HBR- 0400 the company Agilent Technologies.
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Laboraty Pulse Power Supply Using Output Linear Stabilization
Lednický, Marek ; Dušek, Martin (referee) ; Šebesta, Jiří (advisor)
This thesis deals with switched mode power supplies. The theoretic part of the thesis consists of historical development and the elementary schemes of switched mode power supplies. It also includes the comparing with linear regulators. Next, it contains the description of individuals parts switched mode power supplies as a rectifiers, power supplies and stabilizers. There is a proposal and fixing of laboratory pulse power supply using output linear stabilization in the practical part of the paper.
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Power amplifier for shortwave radioamateur bands
Smutný, Štěpán ; Šebesta, Jiří (referee) ; Lukeš, Zbyněk (advisor)
The amplifier is designed in the class AB, for which is typical acceptable efficiency and relatively low quiescent power consumption. As active components, the MOSFETs transistors are used. Their quadratic transfer characteristic allows for a gain control by means of quiescent current setting. The principle of MOSFETs function will be described, along with their utilization in the class AB amplifier. Since the amplifier processes signals in the shortwave band, parasitic capacitances of the transistors reduces gain greatly. Therefore, these capacitances will have to be compensated by positive feedback. First, the function of the amplifier will be verified in PSPICE program, then design or selection of real components (including transformers, heat sink and bias control) will be carried out. By performing measurement on assembled amplifier, we have verified the gain control (doubling the quiescent current increases gain by 3dB). If the quiescent current is set to 1250mA, the gain exceeds 20dB in the range from 1.4MHz to 13.5MHz. Gain at high frequencies was achieved thanks to compensation by positive feedback.
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Wireless system for remote control of pan–tilt–zoom cameras
Chýlek, Richard ; Hubík,, Vladimír (referee) ; Šebesta, Jiří (advisor)
This semestral project is concerned with remote control PTZ camera using the wireless controller, and the controller design including design documents. The controller will be composed of the signal converter, microcontroller and RF module. Control data to the controller will come via link RS485 and controller will be able to communicate using the following protocols-Ernitec and Pelco. The proposed controller, according to data from the manufacturer to have a range of up to 500m. This parameter and also other transmission parameters confirm in the diploma thesis which will focus the actual implementation of the controller.
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Neural Networks in Inertial Navigation Systems
Tejmlová, Lenka ; Ochodnický,, Ján (referee) ; Masopust, Jiří (referee) ; Šebesta, Jiří (advisor)
Disertační práce je zaměřena na oblast inerciálních navigačních systémů a systémů, které pro odhad polohy používají pouze výpočty. Důležitým faktem v dané problematice je vysoká nepřesnost určení polohy při střednědobém a dlouhodobém využívání takového systému díky kumulativní chybě za předpokladu, že inerciální systém není podpořen žádným dalším přídavným systémem. V disertační práci jsou uvedeny možné přístupy k této problematice a návrh na zvýšení přesnosti určování polohy pouze na základě inerciálních senzorů. Základem inerciální měřicí jednotky je systém s 9 stupni volnosti, který umožňuje snímat celkové zrychlení, rychlost rotace a sílu magnetického pole, jednotlivě ve třech osách. Klíčovou myšlenkou je zařazení umělých neuronových sítí do navigačního systému tak, že jsou schopny rozpoznat charakteristické rysy pohybů, a tím zvýšit přesnost určení polohy. Popis navrhovaných metod zahrnuje analytický postup jejich vývoje a tam, kde je to možné, i analytické hodnocení jejich chování. Neuronové sítě jsou navrhovány v prostředí MATLABTM a jsou používány k určení stavu inerciální jednotky. Díky implementaci neuronových sítí lze určit pozici jednotky s řádově vyšší přesností. Aby byl inerciální polohovací systém s možností využití neuronových sítí demonstrativní, byla vyvinuta aplikace v prostředí Qt. Navržený systém a neuronové sítě byly použity při vyhodnocování reálných dat měřených senzory.
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