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NiCd, NiMH and Li-ion accumulator charger supplied and controlled via USB
Nosek, Petr ; Mišurec, Jiří (referee) ; Zeman, Václav (advisor)
Deals with analysis and battery charging NiCd, NiMH, Li-Ion through a series of microcontroller from Atmel AVR controlled and powered from a PC via USB. Part is devoted to the characteristics of the USB interface and software capabilities to the enumeration AVR microcontroller. It also contains the basic characteristics of charged batteries, including the known methods of charging. The second half of the tehesis then provides a complete design and implementation of battery chargers, which consists of electronic parts, ATMEGA168 microcontroller program and the program for the PC. Presents circuit diagram of the charger and flowcharts of the main features of the program. The result of this thesis is functional battery charger above types. Attachments include a proposal DPS, a full circuit diagram and the charge and discharge characteristics of cells. The thesis is also referred to annex to the optical disk. Here it is mainly programs for microcontroller and PC. They are listed here as well as individual projects for AVR Studio, Borland Builder C + + and Eagle, which was created by chargers.
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Narrowband data transmission over the power lines
Valenta, Jaroslav ; Mišurec, Jiří (referee) ; Mlýnek, Petr (advisor)
This bachelor´s thesis is focused on narrowband data transmission over power lines. At first are described possibilities of narrowband data transmission over power lines, next the type of noises and then thesis deals with parameters of communication channel. In this thesis are described too modulation, error corection and data encryption for reliable communication. In the last part of thesis are realized practical measuring in laboratory workplace. The influence of data communication on primary function of power lines are tested. In the end are realized measuring of noise influence on data communication.
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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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Design and implementation of LAN home network using PLC technology
Pataj, Jiří ; Lattenberg, Ivo (referee) ; Mišurec, Jiří (advisor)
Master’s thesis deals with possibilities of data communication on low voltage power lines, so-called PLC. This technology allows data transfer on power lines. According frequency band the PLC can be subdivide into narrowband or broadband class. Given are theoretical knowledge’s of data communication on power lines and describes technical solutions. Consequently is suggestion of LAN, which is accessible for commercial usage made by DS2 and his suitable for home use. The main acquisition is implementing and measuring this experimentally created LAN in family house. The results are real bitrates depending on distance and quality of specific connection.
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Computer models of telecommunication lines
Přívozník, Tomáš ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
The Bachelor‘s thesis named „Computer models of telecommunication lines“ is in introduction aimed to description characteristic quantity of telecommunication lines. Next part describes models which simulates parameters of telecommunication lines in depend on frequency of carried signals. Following chapter describes proposal constants for UTP cabel of category 5e. Constants are used in model BT#0. In the end of this thesis is summary of reached results.
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Optical connection
Horák, Jaroslav ; Mišurec, Jiří (referee) ; Káňa, Ladislav (advisor)
Master's thesis treat of optical connection. The aim of this work was also the practical implementation and successful testing. Communications signal is low frequency in the range of 20 to 15 kHz and intended length of the coupling is approximately 200 m. The first is the work carried out theoretical analysis issues. Then is described the design and implementation of its own facility. In conclusion, the measurement is done and evaluate the parameters. I have dealt the optical connection with using a laser beam that is modulated frequency modulation. This optical signal is converted in the receiver using a PIN photodiode (type PIN) back to the electrical signal. Then there is the demodulation and amplification. The frequency modulator and demodulator is phase lock loop. It realizes the type of circuit CMOS 4046. The work is designed properly functioning equipment. It serves for the transmission of speech and audio signal line. It has good properties that match the criteria. The connection can be used outdoors due to the use of cover. The scope of communication may be even greater than 200 meters
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Wireless sensor network
Hruška, Martin ; Burda, Karel (referee) ; Mišurec, Jiří (advisor)
Wireless sensor network (WSN) consist of a mesh of a several powerful devices (denoted as base stations or sink) and a high number (1000 - 1000000) of a low-cost devices (denoted as nodes or motes), which are severely constrained in processing power, memory and energy. The nodes are equipped with an environment sensor. Events recorded by the sensor nodes are locally aggregated and then forwarded to a base station for further processing. WSNs are expected to be in wide use for a multitude of different scenarios. Project target is to analyse possibility of wireless transfer of digitalised data from sensors. Work contains and compares: Wi-Fi, , WiMAX, ZigBee, GPRS, radio net and IrDA. The work will design a wirelless network with data collection from sewerage plant sensors in small rural agglomeration and transfer data to the central dispatching. The work will suggest several options and compare their advantages and disadvantages.
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Data network for smart grid energy
Durkoš, Michal ; Šimek, Milan (referee) ; Mišurec, Jiří (advisor)
Electric grid as we now it has been without significant change for a long time. Along with the human population grows demand for electricity, which leads to need to create more energy. Bigger interest is in ecology and use of renewable sources, although these do not have constant output which often stresses the grid. These problems are to be solved by smart grids. Smart grids are capable of adjusting energy generation to immediate demand including renewable sources to compensate energy fluctuations in grid. They provide demand response and other applications interesting for end users. Smart grids are combination of achievements in energy, informatics and communication technology. Communication, which is key part of smart grids, has to met certain requirements and can be executed by various technologies. There are described various communication technologies and a design concept of data communication in this paper.
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PLC technology in data collection systems
Kolář, Jan ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
This bachelor thesis deals with the use of PLC technology in data collection. The first part includes information about PLC. An analysis of types, properties and types of modulations of PLC focusing on the narrowband one is carried out. Used modems from Yitran company are described. Attention is also paid to creation of software for an application focused on data collection from simple sensors. The thesis incudes the description of two created applications required for the realization of data collection system. In the last part, measurement of packet loss dependence on distance is described. From the measurement it follows that the modems operate reliably with rising distance as well.
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