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Measurement of transfer speeds and delays in computer networks
Bárdossy, Adrián ; Kubánková, Anna (referee) ; Jeřábek, Jan (advisor)
Bachelor thesis is interested in measurement of transfer rate and latency in computer networks. In the first part of thesis is defined, which motodics of measurement we know, various RFC and their specifications, also various parameters about measurement in computer networks like bit rate, capacity of channel, latency. In the second part are prepared users interfaces and softwares for applying the measurement of thesd parameters. In the last part is application of these softwares and creating and testing methodic of network measurement.
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Flow Measurement of Hot Dusty Gas
Dostál, Jiří ; Štohl, Radek (referee) ; Šedivá, Soňa (advisor)
The bachelor thesis deals with the measurement of hot dusty gas. The introduction outlines the problems of measurement. Another part of the work contains a theoretical introduction to the measurement of gas flow. In successive chapters the basic principles and characteristics of suitable methods for measuring the hot dusty gases are described. Finally, the function blocks are implemented in the Simatic STEP7 for calculation of volume flow rate for the methods selected in the theoretical part and visualization in WinCC flexible.
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Advanced Utilization of Network Analyzers
Novák, Přemek ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
This bachelor´s thesis consists of description of the laboratory network Cisco and any of its components. Furthermore, the possibility of network analysis according to the standards RFC 2544 and EtherSAM and description of the measurement using analyzer Vepal TX300, Fluke NTS II and Sunlite E1 used in lab reports. In the first task, the characteristics of network elements are analyzing. In the second task, parameters of Cisco network are examined and the third task is focused on the E1 frame.
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Automation of measurement of transmission properties of DSL modems
Pokorný, Lukáš ; Šedý, Jakub (referee) ; Šilhavý, Pavel (advisor)
The work deals with transmission parameters of DSL systems and software development for the automated measurement. The first part is devoted to the transmission medium and modulation techniques. The following describes the detailed functions and features of ADSL2+ modems. Integral part of the work is the overview of the ITU test methodology, together with parameters of test loops and types of interference. Within the automation of measurement are described used Spirent simulators DSL414E and DLS8234 and important communication commands. The practical part is devoted to designing applications for control simulators and software for automated measurement. For implementation of algorithms and creation of graphical interface is used C++ programming language. Finally the results of measuring the transmission properties of ADSL and VDSL systems executed by created application are presented.
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Sensorless control of revolutions and position of DC motor
Kakáč, Petr ; Minář, Jiří (referee) ; Prajzner, Václav (advisor)
This thesis deals with the management and control of DC brush motors used in Honeywell actuators. The introduction describes the types of DC brush motors and possibilities of regulation. We chose the method of compensation of the load characteristics. The basic requirement for this job is a requirement to ensure constant engine speed under various load torque. For this requirement it is necessary to develop a mathematical model of the static engine, calculate, verify that the motor constants and, not least, the implementation of the static model for a given engine. The work focuses on the limits of such an engine control or the limitations that we created conditions in practice.)
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Infradiagnostics of Distribution System Apparatus
Kostkan, Petr ; Šlezingr, Jan (referee) ; Drápela, Jiří (advisor)
The bachelor thesis deals with utilisation of thermovision in the field of diagnostics of equipment and components of the electricity distribution network. The aim of this work is to determine the most troublesome components by using results of individual thermovision measurements. It is achieved by processing data from thermovision measurements and subsequently establishing a database of defects. In the next stage, the most defective components and equipment are analysed and measures aimed to improve reliability and trouble-free operation of distribution networks in the Czech Republic are suggested.
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ECG Wave Delineation
Trnová, Kateřina ; Provazník, Ivo (referee) ; Kozumplík, Jiří (advisor)
This thesis deals with the detailed measurement of one cycle of the ECG signal. data samples of the beginning and end of major sections of this cycle are obtained from the values referred to in the database TESTRO. There is found a representative cycle. The text describes basic types of measuremend intervals, principles of multiple methods of measurement and description of the implemented program. Algorithm for measurement of functional units of ECG cycle signal, which was designed, is based on the detection of trend growth, of the field of signal using the first difference. Functionality was tested on a standard CSE database.
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Measurement of mobile network parameters
Gábor, Tomáš ; Hanus, Stanislav (referee) ; Klozar, Lukáš (advisor)
This work deals with theoretical study and practical implementation of measurement and storing of mobile network parameters and following designing an programming web interface for their presentation. IT describes structure and development of GSM and UMTS networks. It also deals with satellite navigation system GPS and measuring module Telit UC864-G, which was used for measuring. The next step was to select a group of parameters that are important for calculating the quality of the signal path and to analyze process of storing the data into the database. In the end is completely described web interface and also all applied programming languages and methods.
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Uncertainty Calculation by the Monte Carlo Method
Kósa, Valentin ; Šedivá, Soňa (referee) ; Havlíková, Marie (advisor)
This bachelor’s diploma thesis deals with the measurement inaccuracies. Various types of uncertainty, methods, their specifications and ways of their recording are described. Next, Monte Carlo method and its application are introduced to the reader. Next, both methods described are applied: calculation of accuracy using uncertainty – GUM method and calculation of accuracy using Monte Carlo method. The methods are applied in measurements of DC current at resistive load with different meters.
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