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Implementation of computer models of lines for PLC
Mrákava, Petr ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
The subject of this thesis is to become familiar with the different parameters describing the lines, and the possibility of modeling data and power models. The thesis also outlined the difference in the mechanical structure of different types of cables. The practical part focuses only on the power cables and measure their basic parameters. Then is created computer model which describes the behavior of cable lines at higher frequencies than are primarily intended. The final section is an experimental network created by the PLC for remote reading of electricity meters, and it measured different transmission properties.
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Project documentation for the design of data networks
Gajdošík, Ivo ; Mišurec, Jiří (referee) ; Mrákava, Petr (advisor)
This Master’s thesis deals with project of blueprints for installation of data cabling in specific building following regulations. Theoretical part describes basic overview of used regulations and principles of data networks with focus on Ethernet and Wi-Fi standards. Separated chapters cover passive layer of data networks and computer-aided-design. Practical part contains implementational and architectural drawing of data network project in multipurpose building. According to these plans the project could be realized.
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MR image processing
Mrákava, Petr ; Smékal, Zdeněk (referee) ; Gescheidtová, Eva (advisor)
The subject of this bachelor's thesis is to become familiar with the methods of processing image acquired by techniques of nuclear magnetic resonance. It describes the gradual steps in the digitizing of the signal to the image data. But in the process a disturbing component is almost always created in the image, in particular noise, which causes image devaluation. Therefore, further work is focused mainly on eliminating present disturbing components. For the noise elimination, the widely used wavelet transformation is applied, which is implemented by banks of digital filters. The experimental part of this work deals with design of MR filtering method, optimal filtering parameters setting, decomposition of images into magnetic field map, and subsequent comparison of results obtained.
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The project laboratory of data networks
Stojaspal, Martin ; Mrákava, Petr (referee) ; Mišurec, Jiří (advisor)
The bachelor thesis on topic The project laboratory of data network is focused on the proposal of Fire alarm system. In the theoretical part, there are described basic elements (extinguishing control panel, fireboxes, and supplementing facilities) which Fire alarm system contains. In the thesis, there also is which property every element has, as divided in the way of usage, what is needed to observe during proposal and during creation of documentation. Most part is focused on Fire alarm (selection, type and localization of the fire alarm). Next part contains the requirements of the project documentation, what the prescript and rules are to abide by projector and what forms of the project documentation are used. Practical part is focused on creating of complete purpose of the project documentation of Fire alarm. There is shown in practice what complete project documentation looks like.
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Measuring unit of electric power quality
Teplan, Miroslav ; Mrákava, Petr (referee) ; Mlýnek, Petr (advisor)
This thesis describes the parameters of electrical energy with a focus on low voltage characteristics and their measurement with respect to the parameters required by standards. In addition, one chapter deals with monitoring of the quality electric energy. Measurement organizations, calculation of power quality and the data collection for its calculation is referred here. For the illustration, the example of a distributed monitoring system from practice is described. The second part deals with the design and implementation of a module for measuring power quality , namely by measuring the voltage characteristics. It describes the selection of the chosen solution, hardware part and firmware for the MCU. To display the measured data, application was created by the Java programming language. The application allows the visualization of the voltage measured Low voltage grid with single phase voltage RMS value 230.
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Power quality measuring system
Valenta, Jaroslav ; Mrákava, Petr (referee) ; Mlýnek, Petr (advisor)
This thesis deals with the measurement of power quality. The evaluating quality parameters, data collection systems and transfer technologies will be discussed. The various type of cryptographic algorithms are also described. Cryptographic algorithms, which ensure to secure data communications from remote collection points of measurement, will be realized. These cryptographic algorithms will be realized in MATLAB and C/C++. The last part is focus on designed and implemented a simulation model to telemetry the power quality.
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Data transmission over the distribution network
Mucha, Martin ; Mrákava, Petr (referee) ; Mlýnek, Petr (advisor)
his paper describes the principle of data communication through high-tension lines.Preliminary work examines the transmission system, the types of high-tensionn lines and then disassembling the possibility to transmit data through this system. Then there is interference with the types of data and analysis. It includes the PLC technology, which include types of modulation and error correction methods. The paper deals with the possibilities of PLC modems and their use. The following chapter defines the ways of modeling the high-tensionn lines through which is possible to deduce the transfer function of lines. The work includes practical examples of setting the PLC modems and data transmission from one modem to another. It shall also include practical demonstration of spectrum communication signal during the data transfer.
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Data communication in distribution systems
Sirotný, Miroslav ; Mlýnek, Petr (referee) ; Mrákava, Petr (advisor)
This project includes a basic overview of concepts as is communication, data communication and distributed to systems. Further focuses on the technology use for remote data collection. Part is dedicated PLC technologies, which use systems for remote data collection. The thesis is also mentioned the concept of quality of electrical energy and standard ČSN EN 50160. The main part is focused on the design, implementation and measurement of the PLC network.
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Software support for design of data distribution
Karásek, Stanislav ; Mišurec, Jiří (referee) ; Mrákava, Petr (advisor)
This work serves as a basic guide to designing such a data distribution. The first chapters deal with the basics of computer networks. They are mentioned types of networks and major hardware elements and topology. The work is mainly focused on a LAN connection to the buildings and the extensive use of technological objects. The following is a basic description of the transmission cables, among which today is dominating type of twisted pair cable. The future is based on cable-based optics, however. Their brief description is here as well. For better orientation in how to design work is included in the chapter on structured cabling. Mentioned are sections of the cabling system, the differences between them and their purpose. Furthermore, the category of twisted pair, that played an important role in structured cabling systems for the past 20-30 years. Description of technical standards, defining structured cabling, terminating the theoretical part. The practical part describes the computer programs, focusing on the design of data distribution. Of these selected AutoCAD Electrical 2011, as the best and most acceptable user tool. The program is broken down and explained the importance of its basic features and mechanisms. For a better understanding of the work is created with the program video tutorial the written commentary. These videos are designed for absolute beginners, but some knowledge will appreciate the more experienced designers. This series of videos made from the student's actions in the AutoCAD preview to the final drawing the cable into the prepared plan. Floor plan of the building together with a random series video tutorial is located on the CD, which is attached to this thesis.
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Monitoring of electric power quality in the distribution networks
Kostelník, Adam ; Mlýnek, Petr (referee) ; Mrákava, Petr (advisor)
Semester project explains the concept of electrical power quality, describes its characteristics and properties defined standards. Further deals with electrical power quality measurement and analyzers that are intended for. Subsequently it focuses on the use of data communication for measured data transmission between the analyzers and collecting points. The conclusion briefly describes the basic properties of the two analyzers selected for the implementation of practical measurements.
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