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Evaluation of Surface Texture Profile Parameters and Verifying of Conformity with the Specification in the Drawing
Kupský, David ; Jankových, Róbert (referee) ; Sámelová, Vendula (advisor)
The first part of the thesis is devoted to the development of the current state of knowledge in the field of surface texture assessment using the profile method. The next part is the analysis of the problem and the proposal of a solution for the evaluation of surface texture with the consideration of measurement uncertainties in accordance with the ISO GPS system. Proposal of measurement and evaluation of the given sample was carried out for the demonstration. The measurement was started using a contact profilometer and then the profile parameters were calculated in the TalyProfile Lite software. Three different specifications were chosen for the calculated geometric parameters to outline all the possibilities that can arise when determining compliance with the specification. The proposal with consideration of uncertainties was compared with the evaluation method according to ČSN EN 4288 and from that were deducated conclusions and recommendations.
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Thermal Mass Flowmeter
Mlčoch, Albert ; Kunz, Jan (referee) ; Beneš, Petr (advisor)
The thesis deals with the design of a mathematical model and practical implementation of a flowmeter based on the thermal principle. The range of the proposed flowmeter is from units of kilograms per hour to lower hundreds of kilograms per hour. The design of the flowmeter is non-invasive to the flow channel, the heating element is located outside the pipe. In this paper, the flowmeter parameters are identified and a temperature regulator is proposed. Measurements are made on a test bench. The results of the measurements are discussed. Modifications to the existing hardware are suggested.
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Analysis of the electrical power measurement system in the local distribution network Pod Palackého vrchem
Hájková, Barbora ; Orságová, Jaroslava (referee) ; Jurák, Viktor (advisor)
The diploma thesis introduces a detailed analysis of the local distribution system (LDS) Pod Palackého vrchem (PPV) in the Brno, parameters of power transformers and cable routes between them. The elements of the electrical network that are influencing the balance of reactive power are described along with its sources and appliances. In the next part is defined the present concept of long-term measurement in the LDS by using current and voltage sensors. This part deals with calculations of power losses in the power transformers and the cable lines together with uncertainties concerning power measurement in the field of energetics. The essential part of the thesis focuses on the analysis of the temporary measurement implementation in the LDS, data processing along with the comparison of measured values from temporary measurement with values from permanent measurement. In conclusion, the error of the system is determined.
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Zvýšení efektivity kontroly ramene tankovací nádrže
Sobotková, Kateřina ; Tůma, Jiří (referee) ; Blecha, Petr (advisor)
The diploma thesis consists of a new design of a controlling procedure for a plastic component of a tank. Its theoretical part deals with the potential sources of errors and uncertainties arising from the measuring itself. It also deals with the characteristics of available CMM devices and includes an analysis of the methods assessing the acceptability of the measurement plan. The practical part analyses systematically the current state and proposes a new solution using a program created using a coordinate machine. A comparison of both variants is presented as an output of the thesis.
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Comparison of different temperature sensors accuracy
Szotkowski, Radek ; Šimonová, Lucie (referee) ; Frk, Martin (advisor)
The Bachelor thesis deals with precise temperature measurument using various temperature sensors thermometers. Resistive temperature sensors, thermocouples and measurument uncertainty are studied. In practical part are mathematically and graphically presented results of measuring in three temperature points. Emphasis is placed on the accuracy of individual temperature sensors. The thesis also includes a laboratory task created for subject matters dealing with diagnosis.
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Measurement uncertainties determined by the Monte Carlo method
Krejčí, Roman ; Havlíková, Marie (referee) ; Šedivá, Soňa (advisor)
This bachelor thesis deals with the determination of the uncertainties of direct and indirect measurements. It focused on the uncertainty calculation by Monte Carlo method and GUM uncertainty framework. The practical part deals with the determination of uncertainties indirect measurement of resistance Ohm’s method. The calculated uncertainties are compared on the basis of the influence of the method, accuracy used devices and the temperature.
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