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The device for temperature sensors calibration
Tomíček, Pavel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design a device that allows calibrating temperature sensors. The device is made of a thermal chamber with Peltier module. Part of this work discusses means of temperature measurement, control and regulation. This work describes design of circuit and PCB. The device can precisely control temperature and temperature profile. It can also automatically calibrate Pt100 and Pt1000 sensors. User can control the device either by interface on the device or from a computer. Temperature range inside the thermal chamber is from 7,5 °C to 115 °C with ±0,10 °C error.
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Precision data logger of electrical values
Tomíček, Pavel ; Boušek, Jaroslav (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design electronic device capable of low-noise long-term measurements of electronic parts and their dependance on atmospheric conditions. First the thesis deals with the theory of low noise precision design. Then electronic components used for signal measurement are studied. At last the block and electronic schematic of the datalogger is described. Device is capable of measuring voltage, resistance, temperature, humidity and pressure. Focus is on the capabilities of voltage measurement. Control of the device is by computer application.
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GPS locator for IoT network
Šulc, Patrik ; Tomíček, Pavel (referee) ; Žilka, Martin (advisor)
Bachelor thesis is focused on build a GPS locator communicating wirelessly over IoT networks. The GPS locator sends an alert when motion is detected. The device is powered by batteries with minimal maintenance. The goal is to achieve minimum dimensions. The work first focuses on the survey of commercially available equipment. Subsequently, there is a summary of available ways of sensing device movement, accurate device location and sending messages to the Internet of Things using LoRaWAN. After a search of components, the practical design of the device is presented in the work.
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Dehumidification station for 3D printing filament
Staněk, Mikuláš ; Tomíček, Pavel (referee) ; Dvorský, Adam (advisor)
The document discusses the issue of wetting the filament for 3d printers and its subsequent drying. Describes possible methods of drying filaments, temperature measurement, heating and cooling, develops a theoretical model of drying station, designs components for assembly. Furthermore, the work includes air flow simulation with block diagrams and flow diagram and describes the principle of operation of the model. It compares the proposed model with similar products on the market. In addition, it contains processing, control PCB, Software, performed functional tests and tests of the working temperature range.
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Revolution counter of high-speed motors
Biječek, Vilém ; Tomíček, Pavel (referee) ; Skácel, Josef (advisor)
This bachelor thesis deals with two issues. Several methods have been explored to measure rotational speed. Primarily the speed of the high-speed shafts. Based on this, it was found that the most suitable method for this experiment is the optical method. The second focus of this work was design and development of the device. A large part is devoted to the selection and application of components, and simulations of circuit connections, which have been successfully tested and implemented. The output is an accurately measured value shown on the display. It also included the design of printed circuit boards, one for analogue information processing and the other for placing the microcontroller with the display.
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Motor inverter for Formula Student
Macko, Maroš ; Tomíček, Pavel (referee) ; Šteffan, Pavel (advisor)
This thesis is focused on a power inverter for traction motors for a Formula Student car. Part of the work involves the design and implementation of this system. The main high-voltage power board design and the selection of suitable components are described. Furthermore, a secondary board is designed, which is used for communication and diagnostic measurements. All systems must comply with the rules of the Formula Student competition.
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Diagnostics unit for train protection system
Dvořák, Michal ; Žilka, Martin (referee) ; Tomíček, Pavel (advisor)
Aim of this work is to design electronic device capable of transfering and saving sent data from a comunication bus. First was introduced importance of such device in context of interstate rail travel. Next, the work introduces all the necessary norms, which must the device in question comply with, and how such norms affecting the design itself. This is followed by introduction of used communication protocols and buses and their implementation. Next, reader is introduced to design of the schematic and design considerations for PCB design. In the last chapter the data rate performance of the modul is evaluated.
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Low noise DC amplifier with selectable gain and auto-zero functionality for use with modern integrated A/D converters
Tomíček, Pavel ; Levek, Vladimír
This paper presents the design and noise measurements of amplifier suitable for use with modern integrated A/D converters. Proposed topology is capable of both amplifying and attenuating its input signal to utilize whole input voltage range of A/D converters. Experimental version achieved full scale input voltage range from ±15 V to ±15 mV. Suppression of offset error associated with amplifier and A/D converter systems is realized using auto-zero scheme. Resulting amplifier used in conjunction with digital filters can achieve more than 20 noise free bits on all gain settings.
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Precision data logger of electrical values
Tomíček, Pavel ; Boušek, Jaroslav (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design electronic device capable of low-noise long-term measurements of electronic parts and their dependance on atmospheric conditions. First the thesis deals with the theory of low noise precision design. Then electronic components used for signal measurement are studied. At last the block and electronic schematic of the datalogger is described. Device is capable of measuring voltage, resistance, temperature, humidity and pressure. Focus is on the capabilities of voltage measurement. Control of the device is by computer application.
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The device for temperature sensors calibration
Tomíček, Pavel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design a device that allows calibrating temperature sensors. The device is made of a thermal chamber with Peltier module. Part of this work discusses means of temperature measurement, control and regulation. This work describes design of circuit and PCB. The device can precisely control temperature and temperature profile. It can also automatically calibrate Pt100 and Pt1000 sensors. User can control the device either by interface on the device or from a computer. Temperature range inside the thermal chamber is from 7,5 °C to 115 °C with ±0,10 °C error.
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