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Measurement module with PTP synchronization
Brabenec, Josef ; Burian, František (referee) ; Havránek, Zdeněk (advisor)
This master thesis deals with the time synchronization of precise measuring systems. The thesis examines various protocols for time synchronization and mainly focuses on the use of Precision Time Protocol (PTP). The thesis describes the key features and implementation possibilities of this protocol, and at the same time it deals with devices that are compatible with PTP. The firmware design for using the PTP protocol on the Cora Z7 development board is analyzed in detail. The PTPd library is used to implement the PTP protocol. Additionally, other necessary libraries were created for working with Ethernet frames, collecting time stamps, setting, adjusting and reading clocks. The thesis also includes experimental measurements aimed at verifying the practical functionality of the proposed solution.
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Time Synchronization in Computer Networks
Matoušek, Denis ; Kořenek, Jan (referee) ; Martínek, Tomáš (advisor)
The master's thesis deals with design of a solution for time synchronization in computer networks that is a crucial problem of many network applications. Based on analysis of protocols for time synchronization, PTP protocol was chosen as an appropriate candidate. The thesis describes the implementation of the design for a special network interface card and demonstrates features of the solution in several tests. A part of the solution processing precise timestamps was implemented in FPGA chip on the network card while PTP messages are processed in a software application. Values of configurable parameters of the application were determined based on analysis of the network card properties and results of particular tests. It was achieved accuracy in order of tens of nanoseconds.
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Wireless timekeeper for firefighting sport
Šlechta, Adam ; Chladil, Ladislav (referee) ; Čech, Ondřej (advisor)
This bachelor thesis deals with the analysis of timekeepers designed for firefighting sport. It presents the possibilities of solutions for these timekeepers and describes their problems. The thesis includes a review and evaluation of commercially available timekeepers. Furthermore, the thesis deals with the possibilities of solutions for wireless communication and remote time synchronization. The thesis describes the design and manufacture of a prototype timekeeper. The thesis also briefly defines the history and individual disciplines of firefighting.
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Computer Identity Based on Its Internal Clock Skew
Franková, Barbora ; Matoušek, Petr (referee) ; Polčák, Libor (advisor)
Thesis deals with remote computer identification based on its internal clock skew. It describes various methods to collect and evaluate time-related data extracted from TCP, ICMP and Javascript. Software package that implements some of those methods is attached as well. During the work, many experiments were carried out to find out possible effects of certain factors. Tests were aimed on software (operation systems, web browsers and time synchronization) as well as hardware (temperature, power source, distance and network connection type) of the remote systems. Interesting results were discovered in areas of IPv4/IPv6 address pairing and NTP time synchronization.
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Sample projects for operator panels
Urbánek, Matouš ; Šír, Michal (referee) ; Zezulka, František (advisor)
In this bachelor’s thesis will learn about the development of exemplary projects that are designed with fixed functionality for operator panels SIEMENS (BASIC, COMFORT, RT). For this task, I have a development environment TIA portal that brings together many software tools and programs. With which allowed me to create code for specific hardware, and communication with him, or in simulation mode to test the behavior of the application in a real environment. Code, on the PLC is required for the platform (PLC) S7-1200. It is modern and provides flexibility in making out our needs in automatik. The task is engaged, firstly synchronization solution PLC and HMI operator panel. Secondly resipes in these panels.
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Distance Protection Design Using Digital Input Data
Wannous, Kinan Hasan Wafaa ; Müller,, Zdeněk (referee) ; Braciník, Peter (referee) ; Toman, Petr (advisor)
Standard IEC 61850-9-2 definuje přenos vzorkovaných měřených hodnot (sampled measured values, SMV) prostřednictvím sítě Ethernet a využití SMV získaných ze slučovacích jednotek nebo přístrojových transformátorů. Implementace IEC 61850-9-2 závisí na vlastnostech datového souboru, jakými jsou časová synchronizace, počet vzorků a časový interval. Dizertační práce je zaměřena na algoritmy chránění a analýzu vlivu standardu IEC61850-9-2LE na fyzická zařízení ochran s analogově/digitálními vstupními daty o proudu a napětí. S ohledem na narůstající míru interakce mezi fyzickými zařízeními a komunikačními prvky byl navržen test pro analýzu komunikace pro rozvodnu využívající konvenční metody (analogové vstupy) a metody digitální založené na standardu IEC 61850-9-2. Práce dále popisuje funkci slučovací jednotky využívající standard IEC61850-9-2LE. Navržená metoda definuje zdroj SMV a analyzuje přenos dat. V rámci práce byl za využití softwaru Matlab naprogramován algoritmus ochrany. Vytvořený model je schopen vyhodnotit vliv harmonického zkreslení na funkci digitálních ochran a vliv přesycení proudového transformátoru na distanční ochranu. V práci jsou zhodnoceny i možnosti zrychlení testování systémů chránění s využitím neuronové sítě. Závěrečná kapitola se zabývá aplikacemi v reálném čase, využívajícími data z rozvodny v blízkosti Vysokého učení technického v Brně. K přenosu dat z rozvodny do univerzitní laboratoře je zde využíváno SMV přenášených optickým kabelem o délce 16 km. Aplikace je vytvořena v programu Matlab a je schopna číst data z ethernetového portu, dekódovat je, převést z formátu ASCII do desítkové soustavy a poté vykreslit průběhy proudu a napětí. Mezi vlastnosti aplikace se řadí jednoduchost použití, schopnost implementace funkcí distanční ochrany, výpočet RMS hodnot proudu a napětí a harmonického zkreslení, harmonická analýza prostřednictvím rychlé Fourierovy transformace a výpočet impedance poruchové smyčky. Všechny výpočty běží v reálném čase a provedena je i citlivostní analýza modelu.
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Wireless sports timer
Gál, Marek ; Horák, Karel (referee) ; Petyovský, Petr (advisor)
This work deals with design and realization of universal sport timer and uses wireless communication between individual components. The purposes is to achieve maximum mobility, reliability and simplicity for users. This work doesn‘t deal with sensing elements of measuring system, it only provides examples of their typical usage. The content of this proposal is the primary unit, which will ensure time measurement with 0,01s resolution and the secondary unit, which will track a sensing elements and provide information for processing to primary unit. The design comprises communication method, hardware of all devices and firmware.
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Movement planning and analysis of device for absolute GNSS antenna calibration
Hynčicová, Tereza ; Kuruc, Michal (referee) ; Kratochvíl, Radim (advisor)
The thesis is aimed at movement analysis and planning of a robotic device for absolute GNSS antenna calibration, which is developed at Brno University of Technology, Faculty of Civil Engineering, Institute of Geodesy. The first section is devoted to independent verification of the temporal synchronization of the robotic device’s movement, which is a prerequisite for the successful antenna calibration. The following section is focused on analysis of moveable characteristics since their knowledge is crucial for the following movement planning. Method of the device’s movement shooting by camera and evaluation its position based on gained photographs is used for both testing measurements. The final part is dedicated to movement planning, especially to calibrated antenna weighting influence on device’s movement characteristics, test results implementation into the observation program and arm movement planning considering the homogeneous calibration measurement layout.
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