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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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Measurement of the piezoelectric charge coefficient
Stehno, David ; Uher, Miroslav (referee) ; Fialka, Jiří (advisor)
The thesis aim was to study in theory the determination of piezoelectric coefficients, in particular piezoelectric coefficient of charge and to use different measurement methods to determine this factor. Also to further study the issue of determining the uncertainties and determine the measurement uncertainty. Measurements were conducted on cylinder-shaped samples, with different dimensions of individual samples. With type material PCM51 and PCM41. Piezoelectric coefficient measurements of charge was carried out using three methods: frequency, direct and quasi-static. The results achieved by all methods are compared at the end of this study and the measurements uncertainty are calculated and discussed for each method.
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Impedance measurement with uncertainty assessment
Fiala, Radim ; Zavřel, Jiří (referee) ; Havlíková, Marie (advisor)
This Master’s thesis deals with standard uncertainity determination for electrical quantities measurement. Next, there are proposals of uncertainity calculation procedures for impedance measurement. Impedance is measured by LCR meter Agilent 4263B. Using the proposed procedures, standard uncertainities are then calculated. Furthermore, there is proposal for an improved laboratory exercise for the MEMT subject, implementing the standard measurement uncertainities calculations.
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Uncertainty and Compatibility in Measurement
Kvapil, Josef ; Zavřel, Jiří (referee) ; Havlíková, Marie (advisor)
This work is concerning the matter of resistor and inductance measurement uncertainty. It addresses the elaboration of general measurement uncertainty processes for the measurements mentioned above using Agilent 4263B, Tesla BM507 and Tesla BM591 measurement instruments. This bachelor’s thesis describes possible sources of measurement uncertainty that might arise from the use of these measurement instruments. It also describes practical examples of resistivity and induction standard measurement projects using these measurement instruments followed by a compatibility evaluation of these measurements.
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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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Uncertainties in interferometric measurements
Kočí, Radek ; Šedivá, Soňa (referee) ; Havlíková, Marie (advisor)
This diploma thesis deals with uncertainties of interferometric measurements and methods for their evaluation. In the theoretical part of the thesis, are described interferometers and interferometric measurement techniques. Furthermore, there is presented process of determining the measurement uncertainty using methods GUM and Monte Carlo. In the practical part of the thesis, there are these two methods are used for qualification of measurement uncertainty calculated for the specific interferometer.
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Measurement of process variable – pressure
Kouba, Martin ; Hammer, Miloš (referee) ; Konečný, Antonín (advisor)
The measurement of the process quantity of pressure is an important element and condition of the functionality of many industrial applications, especially in the environment of commodity production, transport, pharmacy, food industry and many others. In practise, there are many pressure measurement methods that are applied in different environments and conditions. The choice of measuring equipment depends on many factors, such as the measurement range, environment, sensitivity, response speed, or environmental resistance. The correct procedure in their calibration and determination of measurement uncertainties increase the credibility of the measurement results. The means of data transfer in a modern concept make it possible to better secure and speed up the transfer of information in the measurement chain. All of the above-mentioned facts, in sequence and in relation to each other, fundamentally affect the resulting reliability and effectiveness of the measurement of the process quantity. The study of the measurement of the process quantity of pressure from a comprehensive point of view will allow us to analyse the individual elements of the measuring chain and their interconnection. The content of the thesis provides a basic orientation to the issue of pressure measurement and captures the main trends in individual areas.
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Measurement of calibration inductance parameters
Martišek, Jiří ; Fialka, Jiří (referee) ; Šedivá, Soňa (advisor)
This thesis deals with the problem of measuring the properties of coils and their inductance dependence on frequency under the influence of an external magnetic field. The theoretical analysis of the properties, parameters and behaviour of the coils is included. Furthermore, the theoretical part describes the measurement methods and instruments for measuring coils and their parameters. The third chapter is devoted to the Caliber program from Meatest, s.r.o., which can be used to automate both calibration and measurement. The practical part describes the selection of the coil measurement method, the selection of the tested commercial coils and the creation of the procedure in the Caliber program. The rest of the thesis describes the measurement procedure, processing of the measured values and evaluation of the measured results.
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