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Stopwatch for measuring of sports events
Tajč, Martin ; Petržela, Jiří (referee) ; Hruboš, Zdeněk (advisor)
The aim of this bachelor work is the construction of the electronic stop-watch for measurement at sports events. This stop-watch is primary designed for use at firefighters competitions. The first part of the work is focused on a flowchart of the stop-watch and an analysis of its parts. Some alternative methods, which could be used during the construction, are compared. In the following part, there is an algorithm for the microprocessor applied in it described and features of programming languages are briefly compared. Next in the text, there are a detailed user manual as well as a manual for executing of the display panel. In the supplement, particular electronic schematics and printed wiring boards are included.
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Terminal for testing of data communication of public transport vehicles
Fiala, Michal ; Holek, Radovan (referee) ; Macho, Tomáš (advisor)
This term paper deals with subject of wireless communication of city rail transport cars. In this paper are described individual modules for transmission and receiving of data containing communication between city rail transport cars and measures of siding switches. Then there are discussed possibilities of design of system for testing functionality of transmitting and receiving modules and the system is consequently designed. There are also described communication principles and protocol used for wireless communication and MODBUS protocol used for communication over RS-485 serial line. In the end was the system manufactured, completed and equipped with necessary software.
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Broadband services over power lines
Svoboda, Jan ; Martinásek, Zdeněk (referee) ; Stančík, Peter (advisor)
The Bachelor´s thesis is intend on assembly of basic informations from area of PLC systems. It envisages the modern problems in area of communication on the energy supply networks. By the aim is provide compact informations about particular areas of usage PLC systems – both in a household, an automatic exercises and in a possibilities of broadband. The first part of thesis includes the theoretical informations about PLC network. The second part considers by testing of basic parameters PLC network. Of all the made measurements are draw conclusions and valorize the usability of metering devices.
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PLC system for Smart Metering
Bijotová, Kateřina ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
This thesis deals with PLC communication, presents pros and cons of this technology. The thesis describes several basic standards of the narrowband communication and broadband HomePlug AV2 standard. It groups the technology according to frequency band. Also, it brings summary of commercial products and development kits which are using PLC technology. The thesis contains the description of network testing to RFC 2544 recommendation and its application onto narrowband Linksys PLEK500 modems using NetBlazer tester which took place in laboratory of Brno University of Technology’s Department of Telecommunications. The same PLC modems are used in a second series of experimental measurements in home environment. This thesis also deals with comparison of narrowband PLC standards PRIME and G3 whilst exposed to different transmission conditions as defined by pre-established measurement scenarios. Said comparison was attained by measurements using Atmel’s multi-carrier PLC kit SAM4CP16C-EK. In the closing section of the thesis the results obtained by said measurements are consulted with conclusions provided by contemporary PLC-oriented publications.
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Data transmission in mobile networks
Bílek, Petr ; Molnár, Karol (referee) ; Havelka, Dušan (advisor)
The Bachelor’s thesis deals with mapping and usage of mobile networks of data transfers. It describes every particular generation of networks and technologies that they can use. This thesis is divided into two main parts, theological and practical. In the first part, the technologies of the second and third generation currently used for data transfer in mobile networks are described there. This concerns especially GPRS, EDGE and UMTS services. The thesis focuses on modulations used for these technologies, together with the coding and bit rates possible. It compares their advantages and disadvantages and presents their utilization among national operators. It also tries to sketch out the way the data services of mobile networks will proceed. The second part of the thesis is also divided into two parts. The first one is the simulation of the UMTS network with the assistance of the OPNET Modeller 14.5 environment. In this case, the thesis aims at two important characteristics - such as the dependence on the bit rate and distance of the primary station, and dependence on the bit rate and total load of the whole network. Both characteristics are observed mainly because of the bit rate and power characteristics. It describes objects and funcions of the OPNET environment. The next part in the practical section is the factual measurement of the Internet 4G service, provided by T-Mobile operator. The thesis focuses here on the presentation of the outcomes which were accomplished by the practical measurement of that service. The end of this thesis is dedicated to the comparasion of simulated outcomes with the outcomes practically measured, and to the conclusion of the results emerged from them.
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Intelligent system for remote data collection with PLC
Benešl, Lukáš ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
Bachelor thesis deals with PowerLine Communication (PLC), analyzes its advantages and disadvantages of this technology. Shows the frequency division according to the frequency range in which they work. The work includes a methodology of PLC communications testing according to Request For Comments (RFC) 1242 and RFC 2544 standards. Tests of the individual modems were measured in the household on a real network. All modems measured the same topology, and the results were appropriately processed in the form of well-arranged tables and charts. In conclusion, the individual conclusions from the measurements are always discussed. For the measurement of narrowband PLCs with multiple carriers on PRIME and G3 standards, the SAM4CP16C-EK development kit from Atmel was used. Narrowband modems, with single carrier, are represented by the PLC MT49R model manufactured by ModemTec. For broadband modems, the HomePlug AV2 standard was selected in comparison with HomePlug AV. Within the HomePlug AV2, the I2SE PLC Stamp 1200 micro EVK and Linksys PLEK500 development kit were used. For the lower standard of HomePlug AV, PLC was used by COMFAST.
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Design of Measurement Net
Krajčír, Róbert ; Drexler, Petr (referee) ; Kadlec, Radim (advisor)
This thesis deals with transfer of measured data from sensors placed on pulse power generator for long distances in areas with strong outer interference. Main goal is to design fast and reliable network. Therefore some basic transfer methods, which are available for usage, are analyzed. Regarding to the characteristics of these methods, the most suitable option was chosen, which is analog fiber optic link. In the next phase, the concept of the network itself is dealt with, including analysis and choice from variety of modulation techniques, transmitters and recievers and their characteristics. Variety of drive and amplifier circuits are also mentioned, with emphasis on their influence on transfer and noise attributes and available bandwidth. Based on theoretical analysis and component pros discovered, exact parts are chosen and complete concept of the network is established, including auxiliary circuits. According to this concept printed circuit boards for both transmitter and reciever are made and tested.
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Wireless Tire Pressure Monitoring
Hampl, Tomáš ; Čožík, Ondřej (referee) ; Levek, Vladimír (advisor)
This master‘s thesis describes the design of a system usable for wireless measurement of the tire pressure. The goal is to make a theoretical acquintace with the wireless measurement of a tire pressure. Within the master‘s thesis was suggested device at the block level. For individual blocks have been chosen specific circuits. For the device has been selected the pressure sensor SP100-7AT, the microcontrollers Atmega8 and Atmega16 and the wireless module RFM22. The result of the work is a functional prototype of device including software for microprocessors. Final solution was tested during the experimental measurement.
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Wireless transmission of diagnostic data from the vehicle
Tuchyňa, Juraj ; Lattenberg, Ivo (referee) ; Krajsa, Ondřej (advisor)
The main purpose of this project is to analyse used protocols in vehicles available under the OBD II specifications. In the project we will also focus on processing diagnostic data. We will design device for vehicle diagnostic. This device will be able to send processed data on external web server via Internet network. Obtained data will be saved on data server. Building of functional receiver will be the major part of master´s thesis.
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