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Material position tracking in production hall
Sládeček, Michal ; Otáhal, Alexandr (referee) ; Hejátková, Edita (advisor)
This diploma thesis describes implementation of an indoor positioning system for tracking the location and movement of material and products through the manufacturing plant. The system is designed with regards to simple installation and low overall implementation costs. It utilizes method of Wi-Fi and magnetic field fingerprinting. The system employs a client hardware (active tag with Wi-Fi module and sensors designed for this project) communicating with a server software which does the mapping and fingerprinting processing. Finall positioning system is prepared to collect locations data for further analysis aiming to improve efficiency of manufacturing processes.
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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.
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Comparison of solders for power modules
Spaček, Marek ; Boušek, Jaroslav (referee) ; Hejátková, Edita (advisor)
Táto práca podáva náhľad na výkonové polovodičové moduly, technológie v nich požívané a niektoré procesy používané na ich výrobu. Popisuje aj niektoré kvalitatívne kritériá pre spájkovaný spoj medzi DBC substrátom modulu a jeho základovou doskou a metódy používané na ich inšpekciu. Na koniec porovnáva vlastnosti 6-zložkovej vysoko spoľahlivostnej spájky 90iSC vyvinutej firmou Henkel so štandardnou spájkou požívanou na výrobu modulov vo firme SEMIKRON pri použitím rôznych spájkovacích programov, použitím röntgenovej inšpekcie, SAM a metalurgických rezov.
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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.
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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.
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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.
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Three-channel mixing console
Sůra, Lukáš ; Boušek, Jaroslav (referee) ; Hejátková, Edita (advisor)
This work deals with the design and manufacturing of the three channel analog mixing consol. This console is capable of mixing low frequency signals. After a short introduction and distribution of panels is shown a block scheme and then designed circuit diagram. Each chanel is three-band, it is solved by using the equalizer combined with the logharitmic level controller (fader), the sensitivity controller (gain) and the interception button. The preamplifier and three-band equilizer are used to treat the microphone input. The mixing pult has six stereo inputs, three of them for the line levels signals (line in) and the last three inputs for a portable phonograph treated with pre-amplifiers (phono in). It also has three stereo line level outputs used by the main output (master out), the interception (booth out) and the headphones (headphones out). The output corrections are solved by using the five-band equalizer, which can be bridged. The linear level controller (crossfader) is placed beetwen channels. The logathmic level controller is used to setup the output signal.
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Voltage reference based on LTZ1000 IC
Grohoľ, Stanislav ; Musil, Vladislav (referee) ; Hejátková, Edita (advisor)
The thesis deals with the issue of stability of voltage reference based on LTZ1000(A) integrated circuit. At the beginning are specified main parameters of voltage references in terms of stability. The work presents distribution references by architecture and by method of connection to the circuit. Work compares some references of Analog Devices and Linear Technology companies. In work is described voltage reference LTZ1000(A) and its circuits from datasheet. Listed are the main factor that influence the stability of reference, such as temperature, PCB design, Zener diode bias current, airflow and choice of circuit components. Given the description of a design module with the 7 V, 5 V and 10 V output. Made was three samples of PCB. Listed are results from long-term drift and temperature drift measures.
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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.
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Extending the functionality of LaiPen
Trtílek, Jakub ; Šandera, Josef (referee) ; Hejátková, Edita (advisor)
The main goal of bachelor thesis was extending functionality of LaiPen LP 100 with voice recognition module, that would help to insert names of plants, while working with the device. Manual selection of vegetation is in the current version of the instrument barely used, cause of long time demands. Selecting, implementing and programming the voice recognition module EasyVR 2.0, was the topic of my work. Also the design of controlling menu and integration of the module to the LaiPen device. For the integration was necessary to design module, that would mediate communications between CPU and voice recognition module. The work includes also a design of I2C/UART convertor. For this design of the convertor was used microcontroller Max3109, that required to program main controlling functions.
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