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Design of double stabilized power supply
Vlček, Pavel ; Kubíček, Michal (referee) ; Brančík, Lubomír (advisor)
This work deals with a design scheme of a laboratory power supply with high stability of output voltage and additional protections for safer operation of both powered device and the power supply itself. The work describes complex construction of power supply from the design of scheme in the simulator, through its tuning to the required parameters and the design of mains transformer to the construction and building of resulting device applicable in a laboratory. In addition, measuring and evaluation of achieved parameters, such as the ripple of the output voltage, the velocity of reaction current limitation, velocity of reaction the thermal electronic fuse are given.
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Simulator for Passive Multi-Static Radar using WiFi/WiMAX
Sládek, Ondřej ; Kubíček, Michal (referee) ; Šebesta, Jiří (advisor)
This master’s thesis deals with the concept of passive multistatic radar. The radar system exploits WiFi or WiMAX transmitters as the source of radiolocation signal. The transmitters are considered non-cooperative. The master’s thesis evaluates limitations arising from utilization of WiFi or WiMAX signals. A Matlab simulator was created as a part of the thesis, which was used to verify the basic idea behind this concept. Based on the results of real-life simulations, conclusions are suggested towards a possible application of WiFi/WiMAX radar.
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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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The robotic system state indicator
Kovaľová, Alžbeta ; Kubíček, Michal (referee) ; Šotner, Roman (advisor)
This bachelor thesis deals with the design and creation of a status indicator for robotic system developed in Y Soft. Part of this work is the design and implementation of communication between the status indicator and the superior device testing system. A printed circuit board is designed and constructed, and then a microcontroller is programmed and the CAN bus communication is implemented. Subsequently, the device is integrated into the company system for robotic testing, where its functionality is verified.
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Computerized Weapon Live Test
Venhoda, Jaroslav ; Kubíček, Michal (referee) ; Frýza, Tomáš (advisor)
The master thesis deals with the design of device used for gun prototypes testing purposes. It aims at electrical part of the design which controls a stepper motor which through mechanical gear initiates trigger of tested prototype periodically. The core of design consists of the DRV8711 integrated circuit which controls a stepper motor. The integrated circuit is using the microstepping driving technique. The main logic of designed device is controlled by PIC32 microcontroller unit which also communicates with PC through USB bus.
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Programmable ignition system for spark-ignition engine
Friedel, Daniel ; Kubíček, Michal (referee) ; Tošovský, Petr (advisor)
This thesis is concerned with design of programmable capacitive ignition, powered from board grid. Universality of the system, especially possibility to change values of timing of early spark via changes of programme in microcontroller was taken as major goal. Microcontroller is used as the operative element of ignition. Commonly used methods for sensing of engine speed and managing of ignition are defined and explained at the begining of the thesis. Also is presented realisation of hardware and software part and draw up the methodology calibration of the speed sensor. The ignition is designed to avoid the need to intervene in the high voltage ignition system.
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Receiver for remote control
Zdařil, Tomáš ; Kubíček, Michal (referee) ; Kolka, Zdeněk (advisor)
This bachelor’s thesis deals with design and construction facilities that will serve as the receiving module of infrared remote control.This modul will be controlled by the direction of rotation of antenna rotator.Part of this work is theoretical analysis of the issue.It also includes information on selection of appropriate components,primarily for the control microcontroller involvement and thein description of the overall wiring diagram.In the practical part contained information on the construction of this facility,including all documentation and set up the program for the microcontroller that is included on the enclosed CD.At the end of the dokument is a summary of the results of the work.
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Control unit for an industrial convection oven
Augustin, Stanislav ; Dušek, Martin (referee) ; Kubíček, Michal (advisor)
The contents of this semestral thesis is to explore ways to design of controll unit for convection oven for prototype transformers production for welding technology and design a scheme of the unit. The controll unit must be able to regulate the ambient temperature inside the oven using a power management of heating elements (for example heating rail) inside the oven.
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Advancements in the development of a proportional counter measuring system
Kolář, Ondřej ; Kubíček, Michal
This paper is an interim report of theory and continuouswork on the proportional counter measuring system. Thefirst part of the article covers general principles and propertiesof several types of electronic detectors for measuring the ionizingradiation fields including the proportional counters, to highlighttheir positives and negatives. The following part discusses theprocessing of proportional counter output signal. Next, theconducted measurement of a neutron source is described, and itsresults are shown. Based on the gained experience, the simulationand design of a new preamplifier for the measuring system wascarried out.
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High-power LED driver for under-water communication
Hroch, Vojtěch ; Barcík, Peter (referee) ; Kubíček, Michal (advisor)
This bachelor thesis is focused on design of a transmitter for optical links in water using power LED. This thesis analyzes commercial availability of LEDs and their properties, power transistors needed to switch the diods and choice suitable transistor drivers. Furthermore, the thesis is focuse on modulations, which are using in optical communication. Work mentions some aspects of this issue for the underwater signal transmission in terms of the required wavelength depending on the attenuation of optical signals in water. Next solved problematic is designs of circuits including the the design of printed circuit boards. Last part in this work is evaluation of achieved results in comparison with expectations and the possibility of futher improvements.
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