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Time Synchronization of PC in Measurement and Control System
Vořechovský, Karel ; Klusáček, Stanislav (referee) ; Keprt, Jiří (advisor)
The aim of this thesis is to measure the time synchronization precision of chosen methods. Therefor was chosen the synchronization method between two nodes using a couple of GPS recievers and a synchronizatian method through the ethernet using the precision time protocol. The precision of synchronization methods was measured by generating and timestamping an external measurement pulse wired to both nodes. By comparing the timastamps of both nodes was aquired the jitter between them. In addition was measured the timedrift between two clock counters for precise setup of the synchronization interval.
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Project Defence Timekeeping System
Navrátil, Michal ; Crha, Adam (referee) ; Růžička, Richard (advisor)
Goal of this thesis is to design and assemble ethernet module for time measuring panel containing watch and stopwatch which will provide network interface to this panel and will power it through ethernet. One of requirements was to develop a control application for microprocessor controlling watch and stopwatch which loads time via this module from the internet and it sets the watch. Stopwatch is controllable via network through control application which was created as part of this thesis. For this purpose there was created a server running on the microprocessor which interacts with control application. Executables of control application are generated for operating systems Windows and Android. It is easy to run it on Linux as well. Contribution of this thesis is possibility to easily track time from the pc or the phone where student and examiner will have a precise information about time.
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Wireless Communication in Fire Sport
Pelka, Tomáš ; Mrázek, Vojtěch (referee) ; Vašíček, Zdeněk (advisor)
This work describes the design of wireless timer for fire sport disciplines. Its aim is to replace long wires with wireless communication while preserving equal or better reliability. Important part is the need for clock synchronization between wireless modules. Related topic is selection of suitable synchronization algorithm and communication protocol. The proposed system was realized in form of prototype using Texas Instruments's development platform LaunchPad EXP 430 FR4133 and wireless modules with Texas Instruments's chip CC1101. Parameters of designed system (especially the accuracy of time synchronization and measurement) were verified in laboratory.
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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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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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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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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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