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Development of laboratory samples for wireless transmission of electric power based on the magnetic induction
Kopečný, David ; Štěpánek, Jaroslav (referee) ; Krbal, Michal (advisor)
The aim of the thesis is to collect the information about wireless transmission by using magnetic induction and about the current solutions of wireless applications in practice. The thesis includes theoretical basis and information about the current state of wireless power applications. This thesis is also focused on physical principle and draft of possible technical solution. On top of that, it also contains the information from some legislative and hygienic regulations. The second aim is draft of laboratory equipment on the base of gained information and its implementation for purpose of teaching and measuring. For this part was chosen topology of circuit and the specifications of resonance circuits. It resulted in producing a preparation, which consists of the exciter, primary circuit, secondary circuit and a module for measuring. The third aim is to take a measurement on this product and evaluation of characteristic from point of view of efficiency. Measured data were integrated into characteristics. The efficiency of transfer was measured depending on distance and used load. At the same time was also observed work frequency of product. Furthemore, another laboratory product was measured, in which was reached the efficiency more than 51%. The thesis is divided into four main chapters, which can be thematically named as follows: the information, the theory, the draft and the measurement. The first two chapters deal with the theory and characterization of technologies of already applied systems mainly from transport. The following two chapters contain the description of proposal of the product and the very measuring of the efficiency.
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ISM band wireless transmission
Juráň, Jeroným ; Nešpor, Dušan (referee) ; Friedl, Martin (advisor)
This document summarizes the basic possibilities of communication using ISM bands. It also includes extracts from the ČTÚ regulation concerning usage of ISM bands. The theoretical part describes mainly the functions of chosen transmitter and receiver module. Secondly it describes the design and realization of transmitter and receiver devices including the C libraries for basic use, usable distance measurement and example application using developed devices.
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Weight sensing of beehives with long-term stability
Vozdecký, Martin ; Marcoň, Petr (referee) ; Mikulka, Jan (advisor)
The aim of the thesis is to describe the design of stable measurement of weight in beehives. Work evaluates suitable types of weight sensors and their effect on stability. The main part of the thesis is a custom design of electronic sensing the weight of the beehive and telemetry data to the user. The concept of engagement enables stable measurement of mass loading of independence on the ambient temperature.
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Wireless transmission of flight data for low distance
Kučera, Petr ; Maršálek, Roman (referee) ; Prokopec, Jan (advisor)
This diploma thesis deals with the flight data wireless transmission from aircraft to the ground station. This is the data sent from the acrobatic aircraft during races, specifically the GPS position and data from sensors of acceleration and rotation of the aircraft. It dealt with the theoretical analysis of the radio link and design of device that receives radio transmission. In aircraft it is dealt with data capturing and their deployment through the radio module. Data are sending to another post-processing on the ground station after receiving. There are two solutions of radio module and in the last part is a solution for capturing data from more airplanes.
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Half Duplex radio modem
Urbaník, Jaroslav ; Šebela, Radek (referee) ; Prokopec, Jan (advisor)
This bachelor thesis deals with a concept description and realization of wireless system for transmission of control signal. The system is designed for a half-duplex operation mode. Various options for system realization of the task solution is mentioned and described. The work analyses the choice of particular components and their intercommunication as well. PCB and Atmega16 microcontroller software technology is also concerned about. The usage of this wireless system is universal and it is possible to adapt it for particular application.
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Laboratory task of the wireless alarm burglar system
Pokludová, Michaela ; Pust, Radim (referee) ; Burda, Karel (advisor)
The goal of the bachelor thesis is to describe the principials and the technical solutions of the basic contemporary wireless systems, which are later used during the work with panel through the laboratory task. The output of this thesis is the assignment of the laboratory task EZS for the magister scholars of VUT FEKT with the 90 minute duration. The proposed assignment consist of the desribtion of wiring and EZS panel handling. Each step of the desing of the assignment is described and practically verified.
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Wireless transmission interference modeling (AWGN, Rayleigh, Rice fading channels)
Hloušek, Tomáš ; Gleissner, Filip (referee) ; Mikulka, Jan (advisor)
This thesis describes and models wirelesss transmission intereferences in real communication channels. A signal received on a fading channel is subjected to a multiplicative distortion and to the usual additive noise. Real channel adds to the signal noise and fadings. Gaussian noise is a result of channel awgn. Fadings is implicated by multipath propagation of signal in Rayleigh and Rician channels. Main goal of this project is to program BERsolve, which is created in tool GUIDE in Matlab. User program BERsolve makes it possible to analyse bit error rate and symbol error rate for some types of channel models, which are defined by standard COST207. BERsolve offers some other functions i.e. display time behaviour, constellation diagram and spectrum. This program provides us with an overview representation of problem by multipath interferences in communication channels.
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Software for Processing of Head Position Sensor Data
Slávik, Vladimír ; Sekora, Jiří (referee) ; Čížek, Martin (advisor)
The paper introduces briefly topics of retinal detachment, vitrectomy and applicable postoperative care. A system for increasing patient comfort is described, which continuously records and signalizes head tilt. The software part of aforementioned system is implemented, using C++ Builder programming environment and helper libraries supplied by system's hardware component vendors. This software application allows user to analyze recorded data and manage the system. Application's user interface and usage is described in detail, as well as implementation details concerning internal functions and organization.
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Desing of measuring of electric machine rotor temperatue
Chalupa, Jan ; Krejčí, Petr (referee) ; Vlach, Radek (advisor)
This bachelor thesis is focused on temperature measurement issues of rotating parts of electrical devices. Thesis includes proposition and implementation of hardware solution, which enables multi-channel temperature measurements using PT100 sensors. Measured temperature is transmitted into the user’s PC. Thesis also includes user software solution for Windows platforms. Hardware requirements are low. System is primarily determined for temperature test of electrical devices. It can be also used for long-term monitoring of devices in operating state. Transmitter was designed with following considerations. Minimal size, low consumption, mechanical and thermal endurance. These demands require comprehensive approach to the whole system solution.
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Digital audio wireless transmission
Juráň, Jeroným ; Hrabina, Jan (referee) ; Szabó, Zoltán (advisor)
This document describes the design of evaluation boards for wireless transmission of audio signal. The boards use WiSA compliant modules. It describes schematics of transmitter board, receiver board and boards of both AD and DA converter. Secondly the document describes the designed PCBs and demonstrates the results by photodocumentation. It also includes description of C library for using FLASH memory to store data and the C driver for FT800 chip and the typical application using this chip including touch
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