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System for Precise Measurement of Electrical Length of Coaxial Cables
Podr, Michal ; Polívka,, Milan (referee) ; Šebesta, Jiří (advisor)
This thesis describes a study of the measuring methods determining the electrical length of coaxial cable without using a vector network analyzer. First, a general theory of management and its various parameters is briefly discussed. This section is focused more specifically on the coaxial cable and its parameters. The next part is graphically analyzed process considerations in the design of measurement methods and outlined the block structure of the system. The third section describes the working process, prototype testing of the bridge, its measurement and design of the measuring system. In the fourth part the software is described. In conclusion, the results of the work are discussed, accuracy of the measurement system, the obtained parameters chosen with regard to the principle of the measurement system and the overall evaluation of the applicability in practice.
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Strain measurement system
Novotný, Jan ; Fedra, Zbyněk (referee) ; Štohanzl, Milan (advisor)
The batchelor thesis is focused on the design of strain measurement system using a metal resistance strain gages. Measured analog quantity is converted to digital form and sent to microcontroller, where the quantity is adapted and then display. The first part of project looks into genesis of different types of mechanical stresses, principles of resistance strain gages, the types of measurement bridges, theory of analog-to-digital conversion and short description of used microcontroller and liquid-crystal display. There are wiring diagram of the system and printed circuit boards designed in the second part of project. System can be also calibrated and driven by PC using Universal Asynchronous Communication Interface. System is physical realized, its functions are checked and there is subscribed driving of the system. Finally other alternatives of improving properties of the system are analyzed due to posibility of using of the system in practical aplications.
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Strain measurement system
Novotný, Jan ; Fedra, Zbyněk (referee) ; Štohanzl, Milan (advisor)
The batchelor thesis is focused on the design of strain measurement system using a metal resistance strain gages. Measured analog quantity is converted to digital form and sent to microcontroller, where the quantity is adapted and then display. The first part of project looks into genesis of different types of mechanical stresses, principles of resistance strain gages, the types of measurement bridges, theory of analog-to-digital conversion and short description of used microcontroller and liquid-crystal display. There are wiring diagram of the system and printed circuit boards designed in the second part of project. System can be also calibrated and driven by PC using Universal Asynchronous Communication Interface. System is physical realized, its functions are checked and there is subscribed driving of the system. Finally other alternatives of improving properties of the system are analyzed due to posibility of using of the system in practical aplications.
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System for Precise Measurement of Electrical Length of Coaxial Cables
Podr, Michal ; Polívka,, Milan (referee) ; Šebesta, Jiří (advisor)
This thesis describes a study of the measuring methods determining the electrical length of coaxial cable without using a vector network analyzer. First, a general theory of management and its various parameters is briefly discussed. This section is focused more specifically on the coaxial cable and its parameters. The next part is graphically analyzed process considerations in the design of measurement methods and outlined the block structure of the system. The third section describes the working process, prototype testing of the bridge, its measurement and design of the measuring system. In the fourth part the software is described. In conclusion, the results of the work are discussed, accuracy of the measurement system, the obtained parameters chosen with regard to the principle of the measurement system and the overall evaluation of the applicability in practice.
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