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Image processing using Android device - electricity meter value recognition
Sliž, Jiří ; Klečka, Jan (referee) ; Honec, Peter (advisor)
The aim of the work is to design an application for mobile devices with the Android operating system. This application allows image capturing with a camera and image processing with the support of the OpenCV library. The purpose of this application is automatic value recognition of the analog electrometer. The text contains a description of the analog electrometers. The following is characteristic of Android operating system, and this part is directly connected to a draft of the application itself. Next part contains the image processing algorithms, testing and implementation into Android application.
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Design and implementation of Quarter-Hour maximum controller
Žiačik, Martin ; Baštán, Ondřej (referee) ; Kaczmarczyk, Václav (advisor)
This bachelor thesis deals with the issue of regulation of the quarter - hour maximum applied in an industrial PLC. The value of the quarter-hour maximum significantly affects the customer's monthly payments, so the correct setting of this value is a very important prerequisite for savings. In order to avoid unintentional exceeding of the set quarter-hour maximum and subsequent penalties, large customers regulate their consumption appropriately. In the theoretical part of the thesis is an analysis of the problem with a focus on electricity meters and their various communication options suitable for connection to a PLC. Next, in the following chapters, the theoretical analysis continues with an introduction of battery systems and OZE regarding the regulation of quarter-hour highs. The main contribution of this bachelor's thesis is the definition of requirements for regulation and the base design of the algorithm for regulating quarter-hour maximum, which also disposes the possibility of using battery systems and OZE.
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Smart meter security
Fitere, Ivana ; Fujdiak, Radek (referee) ; Mlýnek, Petr (advisor)
Nowadays, electronization, digitization and data transmission are considered as a standard part of our lives. Security is especially important during data transfer and data processing. This bachelor thesis deals with intelligent metering in power engineering. The~work is based on technical, operational, safety and economic aspects of smart meters rollout. The~first part deals with the~analysis of algorithms, norms and standards for smart metering. The work continues with a description of~the~current state of~smart metering in the Czech and Slovak Republics. The next chapters are devoted to~the~creation of an evaluation model, two different security scenarios, their analysis and evaluation based on net present value (NPV). Finally, the results of a real test of GSM communication at two different security levels. Models are displayed in the attached XLS file.
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Recognition of Home Appliances Based on Their Power Consumption Characteristics
Vaňková, Klára ; Černocký, Jan (referee) ; Schwarz, Petr (advisor)
The goal of this master's thesis is to design and implement a system for recognition of home appliances based on their power consumption characteristics. This system should identify the individual home appliances from measurements of the total household consumption. The acquired data could be used for statistics of usage of a particular appliance and subsequent detection of errors or non-standard behavior of the measured device. An important part of my work is a design and hardware implementation of a unit for measuring and a system for processing the measured signal. The first version of my project uses pulse output of an electrometer to measure the energy. This method does not provide a sufficient sample rate but it's a quick way to obtain data for processing and analysis. The second version monitors the power consumption with a multi-purpose AC converter which measures active and reactive power with the desired sample rate. The data is then processed and recognized by two classifiers - HMM and KNN.
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Time-domain Dielectric Spectroscopy of Carboxymethylcellulose
Palai-Dany, Tomáš ; Lelák, Jaroslav (referee) ; Mentlík, Václav (referee) ; Liedermann, Karel (advisor)
The dissertation deals with the time-domain dielectric relaxation spectroscopy of carboxymethylcellulose. The main attention was paid to the experimental part of research, mainly to the design and subsequent development of an experimental setup for the measurement of discharge currents and for their processing and analysis. The subject of the measurement is carboxymethylcellulose (CMC), which is a simple polysaccharide used in wide range of applications, among else also in biomedical engineering. The study of CMC properties has required the development of a new experimental set-up of original design, which includes the equilibration (short-circuiting) of a sample before the measurement, charging and discharging at defined time intervals, switching between these two modes, recording of measurement, adjustments and processing of measured signals up to Fourier transformation into the frequency domain and, finally, calculation of complex permittivity of the sample. The frequency dependence of complex permittivity or its imaginary part, obtained by Fourier transformation of discharge current in time domain, is then referred to as the dielectric spectrum. In view of the fact that current measurements were done at very low levels of measured signal (below 10-12 A) the whole measurement was no easy matter. The framework of the work also necessitated studies and subsequent resolution of problems associated with shielding, grounding, presence of noise and sensitivity to various ambient influences. The research work focused on a reliable and trustworthy measurement of very low discharge currents and, subsequently, mathematical processing of noise present in them, i.e., operations with the original, experimentally established signal in time domain, leading in principle to a digital filtration of measured dielectric data. A further pursued objective is the explanation of dielectric parameters of tested carboxymethylcellulose sample in the widest possible frequency spectrum. The integral part of the research was the selection and application of the method for the transformation of the adjusted signal to the frequency domain. The experimental works, including data processing, were carried out in the Department of Physics, Brno FEEC BUT. Measurements were done with Keithley 617 Electrometer, HP4284A Frequency Analyzer and Janis CCS-400-204 cryogenic system. The results were completed with results obtained at the V Department of Experimental Physics, Centre for Electronic Correlations and Magnetism, University of Augsburg, Germany.
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JAVA- and LABVIEW-based virtual laboratory
Bugla, Marek ; Malý, Jan (referee) ; Pfeifer, Václav (advisor)
Dielektrické materiály jsou použivány v elektronice i v elektrotechnice. Jako jejich základní vlastnost může považovat změnu jejich charakteristik během jejich životnosti. Změny jsou způsobeny namáhaním materiálu vyvolané elektrickými či teplotími vlivy. Možnost jak určit průběh jejich charakteristik v závislosti na čase je měření proudu během aplikování elektrického napětí na materiál. Tyto experimenty vědci z LEMD provaděli ručně, tento postup ale není přílíš učinný pro vysokofrekvenční signály nebo pro experimenty s dlouhou periodou. Hlavním cílem této práce bylo vytvořit aplikaci v LabVIEW k ovládaní měřícího přístroje Keithley (generátor napětí) a k automatickému získavání měřených hodnot v pikoampérech. Tato aplikace nabízí uživateli různé funkce: - Zadání vystupního napětí. - Vyběr typu průběhu. - Definování délky periody. - Ovládaní přístroje. - Měření proudu, ukládaní dat do souboru vhodného pro jiné aplikace (textový soubor). - Analýzu naměřených dat.
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Design and implementation of Quarter-Hour maximum controller
Žiačik, Martin ; Baštán, Ondřej (referee) ; Kaczmarczyk, Václav (advisor)
This bachelor thesis deals with the issue of regulation of the quarter - hour maximum applied in an industrial PLC. The value of the quarter-hour maximum significantly affects the customer's monthly payments, so the correct setting of this value is a very important prerequisite for savings. In order to avoid unintentional exceeding of the set quarter-hour maximum and subsequent penalties, large customers regulate their consumption appropriately. In the theoretical part of the thesis is an analysis of the problem with a focus on electricity meters and their various communication options suitable for connection to a PLC. Next, in the following chapters, the theoretical analysis continues with an introduction of battery systems and OZE regarding the regulation of quarter-hour highs. The main contribution of this bachelor's thesis is the definition of requirements for regulation and the base design of the algorithm for regulating quarter-hour maximum, which also disposes the possibility of using battery systems and OZE.
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Smart meter security
Fitere, Ivana ; Fujdiak, Radek (referee) ; Mlýnek, Petr (advisor)
Nowadays, electronization, digitization and data transmission are considered as a standard part of our lives. Security is especially important during data transfer and data processing. This bachelor thesis deals with intelligent metering in power engineering. The~work is based on technical, operational, safety and economic aspects of smart meters rollout. The~first part deals with the~analysis of algorithms, norms and standards for smart metering. The work continues with a description of~the~current state of~smart metering in the Czech and Slovak Republics. The next chapters are devoted to~the~creation of an evaluation model, two different security scenarios, their analysis and evaluation based on net present value (NPV). Finally, the results of a real test of GSM communication at two different security levels. Models are displayed in the attached XLS file.
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Recognition of Home Appliances Based on Their Power Consumption Characteristics
Vaňková, Klára ; Černocký, Jan (referee) ; Schwarz, Petr (advisor)
The goal of this master's thesis is to design and implement a system for recognition of home appliances based on their power consumption characteristics. This system should identify the individual home appliances from measurements of the total household consumption. The acquired data could be used for statistics of usage of a particular appliance and subsequent detection of errors or non-standard behavior of the measured device. An important part of my work is a design and hardware implementation of a unit for measuring and a system for processing the measured signal. The first version of my project uses pulse output of an electrometer to measure the energy. This method does not provide a sufficient sample rate but it's a quick way to obtain data for processing and analysis. The second version monitors the power consumption with a multi-purpose AC converter which measures active and reactive power with the desired sample rate. The data is then processed and recognized by two classifiers - HMM and KNN.
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Time-domain Dielectric Spectroscopy of Carboxymethylcellulose
Palai-Dany, Tomáš ; Lelák, Jaroslav (referee) ; Mentlík, Václav (referee) ; Liedermann, Karel (advisor)
The dissertation deals with the time-domain dielectric relaxation spectroscopy of carboxymethylcellulose. The main attention was paid to the experimental part of research, mainly to the design and subsequent development of an experimental setup for the measurement of discharge currents and for their processing and analysis. The subject of the measurement is carboxymethylcellulose (CMC), which is a simple polysaccharide used in wide range of applications, among else also in biomedical engineering. The study of CMC properties has required the development of a new experimental set-up of original design, which includes the equilibration (short-circuiting) of a sample before the measurement, charging and discharging at defined time intervals, switching between these two modes, recording of measurement, adjustments and processing of measured signals up to Fourier transformation into the frequency domain and, finally, calculation of complex permittivity of the sample. The frequency dependence of complex permittivity or its imaginary part, obtained by Fourier transformation of discharge current in time domain, is then referred to as the dielectric spectrum. In view of the fact that current measurements were done at very low levels of measured signal (below 10-12 A) the whole measurement was no easy matter. The framework of the work also necessitated studies and subsequent resolution of problems associated with shielding, grounding, presence of noise and sensitivity to various ambient influences. The research work focused on a reliable and trustworthy measurement of very low discharge currents and, subsequently, mathematical processing of noise present in them, i.e., operations with the original, experimentally established signal in time domain, leading in principle to a digital filtration of measured dielectric data. A further pursued objective is the explanation of dielectric parameters of tested carboxymethylcellulose sample in the widest possible frequency spectrum. The integral part of the research was the selection and application of the method for the transformation of the adjusted signal to the frequency domain. The experimental works, including data processing, were carried out in the Department of Physics, Brno FEEC BUT. Measurements were done with Keithley 617 Electrometer, HP4284A Frequency Analyzer and Janis CCS-400-204 cryogenic system. The results were completed with results obtained at the V Department of Experimental Physics, Centre for Electronic Correlations and Magnetism, University of Augsburg, Germany.
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