National Repository of Grey Literature 30 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Level Indicator for Water Reservoirs
Hluší, Martin ; Szendiuch, Ivan (referee) ; Hejátková, Edita (advisor)
This thesis addresses the issue of designing a device for evaluating the water level in water reservoirs. The research part of this thesis introduces and comapares types of level indicators in use. This thesis includes the description of designing the main logic for water level indication. The next chapter describes the program for the microcontroler and also adresses the choosing of the suitable Bluetooth module. Planning of the devices power suply layout with regard to longterm autonomous operation was also sorted out in the scope of this thesis. The mechanical structure of the device was designed based on the knowledge of the individual subsystems. Based on this mechanical structure, the printed circuid board was made. The application, specifically made for controling this water level indicator using mobile phone, was described in the end.
Functional Safety for Microcontrollers
Klecker, Jan ; Pavlík, Michal (referee) ; Hejátková, Edita (advisor)
This Master’s thesis deals with the principles and mechanisms of functional safety for microcontrollers. The IEC 60730 and IEC 60335 standards are described, from which the requirements for testing of microcontroller functional blocks are derived. Furthermore, the requirements for designing safety software are discussed. The most important chapter of the theoretical part is the design and discussion of functional safety tests for the given peripherals. In the practical part, a demo hardware of a gas boiler with safety features and diagnostic mechanisms controlled by two NXP KV46 microcontrollers communicating via a UART interface is designed. In the software chapter, the design of the application software for the gas boiler is described and then functional safety tests are implemented for the microcontrollers. For testing and demonstration purposes, a graphical user interface is designed in the FreeMASTER tool.
Design of placing high voltage electrodes of the projection set of electron microscope on insulating rods
Pavlas, Ondřej ; Musil, Vladislav (referee) ; Hejátková, Edita (advisor)
In it´s first part, this presented master´s thesis focuses on the problematics of actions taking place in dielectric materials and phenomenons on the surface of real insulators placed in electric field. This research is followed by selection and rating of appropriate ceramic materials for the actual design of the metal – ceramic assembly. The greatest emphasis is given to design of the optimal configuration of the insulator and electrode, which is supported by simulations from the software that implements finite element method. Eventually, the high voltage tests of the assembly used for measuring leakage currents are performed.
Switching power supply for electron microscope
Jánešová, Daniela ; Szendiuch, Ivan (referee) ; Hejátková, Edita (advisor)
This thesis is about theory of switching power supplies and about a specific solution of switching power supply for electron microscope. In the beginning of the thesis are mentioned various solutions of part blocks of switching power supplies, their advanteges and disadvanteges, and their suitability for electron microscopy. In the next part of the thesis are described requirements and design scheme of switching power supply for scanning part of electron microscope. The thesis i also about technical solution and practical testing of the switching power supply and verification of its functions.
Production testing equipment
Vokřál, Jiří ; Musil, Vladislav (referee) ; Hejátková, Edita (advisor)
The thesis introduces the design of a test device for preassembled mechatronic cylindrical locks. The device is designed to test the mechanical and electronic parts which ensure minimisation of loss caused by poor preassembling or defect due to electronic parts. Since the defect will only come to realisation upon the complete product testing, the time of complete dismounting, exchange and assembly of the mechatronic parts would be saved and also time required for the final test of the whole product on the device would be saved.
SPICE model of LDMOS structure
Loginov, Dmitrii ; Biolek, Dalibor (referee) ; Hejátková, Edita (advisor)
V této bakalářské práci je provedeno porovnání struktury LDMOS oproti konvenční MOS struktuře. Anomální efekty, výzvy, které tato struktura přináší do oblasti modelování a charakterizace jsou popsány v první kapitole. Další část této práce se zaměřuje na existující možné přístupy v charakterizaci LDMOS struktury, které se používají v polovodičovém průmyslu. V druhé kapitole je také popsána BSIM metodologie, která je dále použitá pro vytváření modelu LDMOS popisujícího DC a CV chování. Kroky charakterizace, která probíhala v laboratoři ON Semiconductor, jakožto měření součástky a ladění charakteristik modelu až do výsledného souboru parametrů BSIM4, jsou uvedeny v posledních kapitolách této práce.
Apodization of the fibre Bragg gratings by use of phase mask UV exposition
Burian, Tomáš ; Hejátková, Edita (referee) ; Urban, František (advisor)
This thesis describes the problem of fiber gratings, focusing primarily on the use of Bragg's grids in the sensor. It describes the types of fiber mesh production, especially the method of writing with a phase mask. The next part deals with the possibilities of using apodization in fiber optic systems. It deals with the various functions that can be used to describe apodization. The following part describes the moire principle, especially the method of overlapping two phase masks with a different period.
CAN Flexible Data Rate transceiver evaluation platform
Hus, Peter ; Pavlík, Michal (referee) ; Hejátková, Edita (advisor)
The aim of the work is to develop an evaluation platform for comunnication on CAN FD bus. This evaluation platform is mainly intended to be used for the application support of the NCV7344 CAN transceiver on given module. The main part of the work is to develop firmware for SAM V71 microcontroller and a control application software for computer. This control application will serve to setup the communication parameters, send and receive data and control communication in the testing network. Attention is also paid to develop and test effectiveness of signal improvement circuits and their impact on bit error rate in real conditions on designed evaluation network.
PROTOTYPE OF ADAPTIVE REAR LAMP
Holinka, David ; Vysloužil, Ondřej (referee) ; Hejátková, Edita (advisor)
The thesis focuses on the design of hardware and software prototype of adaptive automotive rear-lighting. Hardware includes a control module and LED module with 150 high brightneess light emitting diodes. These diodes are serve as an adaptive backlight for color LCD display. The device Raspberry Pi 3 was selected as the control element. This device insludes the support of all communications buses which are used in this thesis.
Comparison of properties of thin layers of titanium, nickel and silver used in semiconductor technology
Dorotík, David ; Prášek, Jan (referee) ; Hejátková, Edita (advisor)
Bachelor theses were connected with knowledge of general problems of application of thin films by methods of sputtering and evaporation. Prepare the substrate and clean it before depositing thin layers. The work was focused on the properties of these thin films in semiconductor technology.

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