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Control Unit for Church Bell Electric Drive
Bureš, Petr ; Novák, Pavel (referee) ; Šebesta, Jiří (advisor)
This work deals with analysis induction motors. There are described their principle and methods of starting, the engine controls and the stop braking. In terms of this study it was determined the engine controls type for control unit for church bell electric drive design. In next part there is complete hardware and software design of control unit.
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RC car model
Veverka, Vítězslav ; Frýza, Tomáš (referee) ; Šebesta, Jiří (advisor)
The aim of this bachelor thesis was an analysis of possibilities and requirements for driving systems of vehicle model. In the thesis, available undercarriages, which are suitable for an implementation of driving system, were presented. Furthermore, the study of the interface for the regulator and possibility to use a microcontroller in the driving system, were necessary. The wireless communication between transmitting part and microcontroller was tested just as controlling of an engine speed. The programme for driving of the model in PC was designed and tested by using C language. General behaviour of the model was tested. The response to control and achieved driving precision was tested too. In the end, assistant sensors for collision detection were added to the model.
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Positioner for Solar Panel with Power Efficiency Optimizing
Kreysa, Karel ; Punčochář, Josef (referee) ; Šebesta, Jiří (advisor)
This thesis is focused on design and prototyping of solar panel position control system for an obtaining of the maxima renewable energy from sun. In this thesis, various ways of solar panel positioning are considered and analyzed. Consequently, a construction arrangement of the positioner is presented. It is mechanically adapted to obtain the maximum efficiency in typical environment corresponding with the Central European geographical latitude. Different methods of sun monitoring are considered and analyzed. On the basis of this analysis, a proper prototype of sun monitor for exact positioning with disturbance filtering has been constructed. Following part of work is devoted to stable, fully automated, control subsystem for reliable functionality of solar system. A suitable microprocessor with a robust firmware has been implemented to this control unit. Finally, system parameters measurement and closing analysis of gained renewable energy and backflow computation is presented in the end of this diploma thesis.
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Acoustic Sources Localization Using TDOA Method
Bernkopf, Jan ; Vyskočil, Pavel (referee) ; Šebesta, Jiří (advisor)
The project deals with theoretical and practical resolution of acoustic localization using TDOA method. It specifies designing circuitry for receiver and transmitter. Furthermore it introduces the way of communication between microprocessor that analyzes received signal and computer that displays the result in understandable shape. And finally it is concerned with designing printed wirings.
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BPSK transmitter for 435 MHz
Hocz, Jan ; Šebesta, Jiří (referee) ; Urbanec, Tomáš (advisor)
This thesis deals with basics of BPSK modulation. Another part compares different integrated circuits of transmitters able to use BPSK modulation on a given frequency, the choice of suitable microprocessor and transistor. Another part describes the connection of individual integrated circuits on printed circuit board and their realization. In the following section, the software and individual commands for transmitter control are described. In the final section is the functionality checked and the basic parameters reached are presented.
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Algorithm visualization using user-defined scripts
Šebesta, Jiří ; Ježek, Pavel (advisor) ; Šerý, Ondřej (referee)
The goal of this thesis was to create a program (AlgoShow) for explanatory chart of algorithms' process. Algorithms are written in the form of user-defined scripts that offers various functions for graphic presentation of algorithm's process. The thesis describes the program from both user's and programmer's points of view. The text includes short introduction into algorithm visualization, comparison of the AlgoShow program with another similar tools, description of design and implementation of the program including the method of script's interpretation. The thesis also includes characterization of essential program's features and detailed description of scripting language.
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Digitizer for radar senzors
Cích, Augustín ; Šebesta, Jiří (referee) ; Kubíček, Michal (advisor)
This bachelor thesis deals with digitization of analog signal of radar sensors, which employ Doppler‘s effect. Radar sensor used for construction of prototype was HB100. Digitization was done with ADC, which has 12 bit resolution and sample rate of 15,625 kS/s. Control unit of aquisition is Arduino UNO, which sends data to computer, where they are, in application interface made in MATLAB, processed using „watterfall“ spectrogram.
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Design and construction of double laboratory power supply
Klein, Miroslav ; Šebesta, Jiří (referee) ; Brančík, Lubomír (advisor)
This semester thesis deals with design of double laboratory DC power supply with adjustable voltage and current limitation. Power supply can work in two states. First state allows regulation of output voltage from 0V to 40V and current limitation from 0A to 3A. In second state the range of output voltage is from 0V to 18V and output current can be set from 0A to 6A. Both supplies are galvanically separated and can work independently, or can be combined. Whole power supply is digitally controlled by microcontroller.
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Design of synchronous switched-mode power supply for automotive
Sedlák, Jakub ; Šebesta, Jiří (referee) ; Kubíček, Michal (advisor)
This bachelor´s thesis deals with the DC/DC convertors and their application in automotive lighting. In first part of thesis, there are mentioned DC/DC convertors, their basic topologies and synchronous rectification. In next part of thesis, there are compared selected integrated circuits, which are suitable for this application. For one of these circuits is created a design. For this design was created a simulation to find out, that design is working. This design was realized and was tested according to automotive standards. In the end, there is a working DC/DC convertor, which meets requirements and basic limits from automotive standarts.
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Timer For RC Models
Fišer, Ondřej ; Pospíšil, Martin (referee) ; Šebesta, Jiří (advisor)
This paper describes complete design of timer for RC models. Described timer has three PWM outputs. With these outputs it is possible to connect two independent servo-motors and engine controller. 1 signal. The whole is controlled by 8-bit microprocessor. The time records are stored in external EEPROM, that can be programmed using I2C. Paper further discuss design of programming, which can be easily programmed the memory of EEPROM by the PC or smartphone. The goal of this paper is to design and build high quality RC timer with accessories.
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