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Distributed measurement of acoustic vibrations and temperature
Bukovský, Jan ; Záviška, Pavel (referee) ; Münster, Petr (advisor)
This work deals with the problem of vibration and temperature measurement using standard telecommunication optical fibers. The main focus of this work is on the measurement of these parameters with distributed acoustic sensing systems (DAS). In this work are also discussed the issues of vibration and temperature measurement with distributed strain and temperature sensing systems (DSTS), with distributed temperature sensing systems (DTS) and with interferometric systems. As part of this work, measurements were made in the laboratory with a commercial DAS system. During these measurements, vibrations and temperature changes around the fiber were simulated. Several methods of data processing have been proposed to evaluate the measured data. The proposed methods of data processing and evaluation of the measured data can be found in the last part of this work.
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Applications of optical fibre sensors
Ráboňová, Jana ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
This master's thesis deals with the measurement of soil temperature. In the theoretical part, optical fiber systems were explained, with a focus on DSTS systems and their use. In the practical part, a functional system was created to measure the soil temperature at depths of 0.1-1~m using the Arduino platform. Furthermore, the temperature measurement was demonstrated on the test polygon using the optical fiber of the FTB 2505 instrument in laboratories.
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Data backup technology with a focus on backup between remote sites using the EMC Avamar deduplication backup
KINDELMANN, Ladislav
The aim of this dissertation is to analyze the way data backup of remote sites deduplication technology system used by EMC Avamar. This is a special type of data compression used not only when saving to disk arrays, but also in a virtual environment. Deduplication ensures saving storage space and reliability of data recovery. EMC Avamar system is one of the best-engineered and most extensive systems of which the above technology is used. The dissertation is divided into two parts - theoretical and practical. In the theoretical part student briefly summarize the available backup technologies and describes the remote backup methods, including examples using available software and hardware requirements. Then it specifies details of EMC Avamar and its implementation, HW requirements and functioning of the entire system. Student will analyzes the data deduplication technology, which the system uses, description of data transferring and the possible advantages and disadvantages compared to other systems. In the practical part it creates own proposal for implementation of data backup using the above mentioned system in a business environment between the two branches of the company. The aim will be to show the real technology features, advantages and shortcomings. The conclusion of the dissertation the student all accompanied overview of the use of backup systems in today's global market.
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Fiber optic sensors
Janďourek, Leoš ; Šifta, Radim (referee) ; Čučka, Milan (advisor)
Term paper deals with optics, optical fibers and in particular with optical sensors, which are described in more detail. Furthermore, we introduce a new simulation program from VPI photonics. We will show the user interface and the possibiliti of sumulation in it.
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Evaluation of porosity in Al-alloy die-castings
Klocová, Petra ; Nová, Iva (referee) ; Čech, Jaroslav (advisor)
The objective of this diploma thesis is an evaluation of die-castings porosity, eventually the evaluation of seats with local squeeze in connection with their mechanical and structural properties. The swatches of alloy AISi9Cu3 were taken from the engine block made by Škoda Auto Company, Mladá Boleslav. To the evaluation and the comparison of the results there were the other VUT FSI Brno students´ theses used.
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Al-alloy die-castings-trends in industrial
Rýdel, David ; Pacal, Bohumil (referee) ; Čech, Jaroslav (advisor)
The objective of this diploma thesis is to state the influence of porosity, DAS and shape factor on mechanical characteristics for the cast transmission cover made in Kovolit Modrice a.s.Which was molten from AlSi9Cu3. It was used an imaging software (Olympus Five) for classification of metallographical structures.
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Evaluation of porosity in gravity - cast Al - alloy castings
Staňková, Markéta ; Nová, Iva (referee) ; Čech, Jaroslav (advisor)
Solving of this diploma thesis is evaluation porosity in sequence on mechanical properties from different Al alloys. Castings were made by gravity casting to the iron-mould or gravity casting to the sand. Measurements (mechanical properties, porosity, DAS - dendrite arm spacing, shape factors and sphericity) were statistically analysed and dependencies which were detected were processed to the graphs.
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Design of optimal utilization of company's data capacities
Odehnal, Tomáš ; Hrbáček, Miroslav (referee) ; Ondrák, Viktor (advisor)
The diploma thesis deals with the problem of storage capacities of server discs in the allowance organization of Brno City Museum. The organization has long-lasting troubles with insufficient capacity of these discs. The aim of this thesis is to analyse the current state and to propose a suitable solution on the basis of the results of this analysis. Further, the suggested measures should be applied as well.
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Microphone arrays for spatial separation of acoustic signals
Grobelný, Petr ; Schimmel, Jiří (referee) ; Míča, Ivan (advisor)
The goal of this master’s thesis is to explore the possibilities of multichannel localization of acoustic signal sources and their following application on a real signal localization and separation, using Beamforming methods. During this thesis two beamforming methods were selected, namely Delay and Sum a Constant Directivity Beamforming - Circular Arrays, and were applicated on real environment signals using two microphone arrays’ geometries ULA (Uniform linear array) and UCA (Uniform Circular array).
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