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Design and implementation of RGB sensor for educational unit
Švehla, Lukáš ; Krejsa, Jiří (referee) ; Spáčil, Tomáš (advisor)
This thesis deals with construction of RGB sensor which will be extension for preparing of the education kit equipped with microcontroller AT Mega on Arduino board. It contains a brief introduction how the photodiodes work. There is also described some chosen RGB sensors, suggestion and realisation of Printed Circuit Board. Next continue with measurement. Then is chosen and completion final product from the best sensors.
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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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Road detection for mobile robot using image processing
Coufal, Jan ; Štarha, Pavel (referee) ; Krejsa, Jiří (advisor)
Diploma thesis deals with image processing for outdoor environment mobile robot. In first part, the problem is analyzed, general solution is proposed and suitable image processing methods are presented. In second part presented methods are tested and methods with best results are proposed. In third part is particular solution tested on real data.
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Adaptive Control of Electromechanical Actuators using Multiple Model Adaptive Feed forward Compensator
Sova, Václav ; Křivánek,, Václav (referee) ; Krejsa, Jiří (referee) ; Grepl, Robert (advisor)
This thesis deals with the derivation of novel adaptive feed forward compensator, which will be used for the control of the electromechanical actuators used in automotive industry. The electromechnical actuators are an electronic throttle valve and an EGR valve. The introduced adaptive compensator is derived from an existing multiple model feedback control method. This work describes the derivation of this method and simulation and experimental verification. In addition, the most well known digital filter differentiators are presented and summarized in this paper because the feed forward compensator needs them for its operation. From these filters, one specific is chosen, whoose coefficients for the specific setting leads to integer multiplication and an integer implementation of the filter. This will be used to implement this filter to the FPGA and then we prove, that this implementation saves a lot of FPGA resources compared to filters implemented using fixed or floating-point arithmetic.
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Usability of compass in indoor mobile robot navigation
Pilch, Petr ; Ripel, Tomáš (referee) ; Krejsa, Jiří (advisor)
This work is focused on usability of compass HMC6343 for controlling the mobile robot in an indoor environment. The first part shows the history of compass and describes the principle of operation of some types of compasses including anisotropic magnetoresistive sensor. HMC6343 compass used for the measurements in real environment is based on this principle. The measurement is evaluated and the usability of data gathered this way is discussed the second part of the thesis.
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Evaluation of image processing methods for flying object tracking using drone
Daniš, Stanislav ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
The bachelor thesis was focused on the evaluation of tracking algorithms contained in the OpenCV library against the motion blur effect. A dataset of videos was created with defined ranges of selected parameters that influenced the motion blur effect (speed, distance from the object, position of light and others). Each of the videos was processed using a tracking algorithm. From these results, findings on the effectiveness of each of the algorithms for a defined situation were formulated in the conclusion.
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Design of sand blasting machine modification
Klár, Pavel ; Fuis, Vladimír (referee) ; Krejsa, Jiří (advisor)
This thesis is focused on design and implementation of structural adjustment of sandblasting machine with regard to the requirements of resolution. The first part consist of short study describes a blasting technology and various types of blasting machines. Second part – practical part consists of problem analysis and setting goals to be achieved. The main goal of the design is to not influence the machine and to limit presence of the operators by modification in the actual process of sanding. There is also detailed design of solution’s proposal which fulfills the specified goals and is supported by calculations. Descibed design was realized and preliminary results suggest that pre-defined goals are met.
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Testing of service life of the bolt fastening used in electron microscopy
Habarka, Ondrej ; Radoš, Jiří (referee) ; Krejsa, Jiří (advisor)
Cílem této bakalářské práce je vybrat vhodný materiál a jeho povrchovou úpravu pro šroubový spoj s jemným závitem na držáku vzorku v elektronovém mikroskopu. První částí je přehled použitelných materiálů a povrchových úprav, které jsou nemagnetické, tudíž neovlivňují elektronový paprsek v mikroskopu. Dále se práce zabývá tvorbou testovacího zařízení na testování životnosti jednotlivých vzorků závitových tyčí. Výsledkem práce je porovnání testovaných materiálů a výběr jednoho nejvhodnějšího pro reálné použití.
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