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Programmable attenuator for laboratory measurement
Husslik, Tomáš ; Šimka, Marek (referee) ; Polák, Ladislav (advisor)
This thesis deals with the design of a programmable attenuator with digital control. The main objective of the work is to design and create an attenuator with a nominal impedance of 50 , providing adjustable attenuation in the range of 0 to 40 dB, functioning within a bandwidth of 1 to 2 500 MHz. Control of the proposed attenuator is facilitated by a microcontroller that manages the settings of an integrated circuit attenuator. Furthermore, the attenuator features a basic user interface. A PCB was designed for the attenuator and subsequently manufactured. The device was then assembled and its key parameters were measured.
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Platform for Digital Predistortion Based on RFSoC
Kříčka, Tomáš ; Maňas, Ondřej (referee) ; Král, Jan (advisor)
Signal predistortion occurs in modern communication systems and in other systems requiring linear signal amplification. The objective is to learn about signal predistortion, the QORVO 1800 MHz FDD radio front-end and to implement the front-end control using Matlab computer program. I focus on controlling individual attenuators and amplifiers on the QORVO front-end with a program written in C. Using a single board computer Raspberry Pi 4B running Linux. Furthermore, the work involves the application of a SCPI server that operates based on TCP packets. As part of the introduction to the front-end, the power characteristic of the power amplifier is measured.
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Control Unit for Autonomous Vacuum Cleaner
Matějů, Jan ; Kopečný, Lukáš (referee) ; Žalud, Luděk (advisor)
This paper is in introduction focused on review of robotic vacuum cleaning and evaluation of available products qualities. However the main focus of this paper is system design of all subsystems, control systems and PCD design of robot electronics. In this paper is also described a method for evaluating approximate distance of robot from the obstacle. There are also described problems of system design of IR proximity sensors. The last part of this work is development of control software for robot and its testing.
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Ultrasound image processing
Pokorný, Vojtěch ; Harabiš, Vratislav (referee) ; Mézl, Martin (advisor)
Ultrasound is an important imaging modality used in medicine. This bachelor’s thesis includes theory regarding physical characteristics of ultrasonic waves, a brief overview of the historical development of ultrasound as an imaging modality in medicine, biophysics of spreading and biological effects of ultrasound waves on tissues and types of display final images. Next part of the thesis describes diagnostic ultrasound device, including the most common used types of ultrasound probes. This part is followed by description of animal Vevo 2100 ultrasound system from which the acquired data are processed further. Processing includes the loading, display and for DICOM files saving too. At various file formats DICOM standard comparison is done. The last chapter deals with the filtration of characteristic noise for ultrasound images called speckle.
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Wireless sensor network
Beneš, Vladimír ; Pavlík, Michal (referee) ; Bohrn, Marek (advisor)
The bachelor thesis describes the design and implementation of wireless sensor network for temperature measurement. Network have to meet requirements for multi-hop network-type. That means, the sensor unit is out of the range, information about the measured temperature will be transfer between sensors. The sensor that is in range of the control unit will retransmit data from multiple sites to the main device. The sensors and the control unit are controlled by a microcontroller and a battery-powered for better mobility. The transfer of measurement data uses free zone for short-range devices - 433 MHz.
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Wireless sensor network
Šťáva, Radek ; Šteffan, Pavel (referee) ; Pavlík, Michal (advisor)
The main theme of this work is to design and make a modern network of wireless sensors, when the main used circuit in the sensor module and the receiver module is microcontroller Texas Instruments CC430F513x. Care is taken primarily at very low power of sensor module for long battery life when on battery power. It is also emphasis is on reliability involvement of miniature size, expandability and high precision modules of basic sensors.
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Wireless sensor network
Beneš, Vladimír ; Pavlík, Michal (referee) ; Bohrn, Marek (advisor)
The bachelor thesis describes the design and implementation of wireless sensor network for temperature measurement. Network have to meet requirements for multi-hop network-type. That means, the sensor unit is out of the range, information about the measured temperature will be transfer between sensors. The sensor that is in range of the control unit and will have saved data from multiple sites, to transmit all the data controller. The sensors and the control unit are controlled by a microcontroller and a battery-powered for better mobility. The transfer of measurement data uses free zone for short-range devices - 433 MHz.
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Design and implementation of smart wiring in the apartment with visualization
Valo, Marek ; Pěcha, Jiří (referee) ; Bátora, Branislav (advisor)
This thesis deals with the classic and system wiring as well as their implementation and visualization environment for its operation. The aim of this work is to implement the project of the existing high-voltage and low-voltage wiring housing units accompanied by a design of the system wiring. This design is then fully implemented. In the beginning of the work is introduction to system wiring as such, added by a brief comparison of current systems. Followed by two chapters dealing with two selected systems for the realization of wiring. These chapters succinctly capture the essence of the system, its characteristics and features offered by each system. The last part deals with project design of wiring for the residential unit and the procedure for its commissioning. The practical part is dedicated to creating drawings with the existing power and low voltage distribution systems, the design of the smart wiring and electrical switchboard, together with possible modifications. The project documentation also discusses technical report. Finally, the selected system is tested and commissioned according to the requirements.
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Data logger
Albert, Matej ; Šandera, Josef (referee) ; Šteffan, Pavel (advisor)
This bachelosr’s thesis is about designing and construction of data logger for laboratory purposes. The goal is to construct such a station with possibility to connect multiple wireless sensors, with ability to measure various data, like temperature, humidity or pressure. The wirelles sensor will be powered by battery. The station will be operated remotely, for example from personal computer.
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Wireless lighting control
Pilmajer, Pavel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
Thesis deals with the issue of lighting technology control using wireless technology. Thesis includes a description of current possibilities of control light technology, methods of digital signal transmission using radio waves and protocols dealing with this issue are described. This thesis also contains a park aimed at the selection of suitable electronic components including the design of individual electronic blocks and printed circuit board. The conclusion of the thesis is the realization of electronic modules, including the creation of module software and measurement of achieved parameters under real conditions.
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