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Tube headphone amplifier with USB DAC as an input
Rozkopal, Tomáš ; Schimmel, Jiří (referee) ; Vlček, Lukáš (advisor)
This thesis focuses on transferring of sound through USB bus. There is analysed a principal of the bus, it´s physical properties and a description of information transmission. Behaviour of the end point is described on an example of an audio device. The second part of the thesis describes demands on digital/analogue converters, their attributes such as resolution, speed of conversion and signal to noise ratio. Furthermore there are described two basic conversions between digital and analogue conversion. The third part of the thesis analyses a principal of tubes and explains a principal of vacuum diode, triode, tetrode and pentode. The individual types of tubes are supplemented by currently produced types and brief descriptions of their use in a circuit. Possible solutions of designing data transfer between a computer and an end point are discussed in the fourth part of the thesis. Different available microcontrollers are compared. The design continues with solving a problem with connecting a DA converter using I2S bus and there is also designed DA converter with voltage output. Demands for analogue filter and numerically derived main assumptions for end amplifier are explained in the final part of the thesis. Tube filter low - pass type is designed and possible solution of an end amplifier is discussed.
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Pipe materials
Pecl, Tomáš ; Helcelet, Marek (referee) ; Molliková, Eva (advisor)
Objective of the bachelor thesis is to introduce the important aspects of the material for the manufacture, installation and operation of pipeline systems. The thesis mentions the suitability of individual groups of pipe materials for various technological and natural conditions with respect to the material properties. The work deals with the pipe installation, implementation of control tests with a focus on of technology pipe installation before commissioning, finding defects and the possibility of repair. Finally, in the work are placed practical information that helping solve problems
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The Steel Structure of the Car Schowroom
Pelechová, Denisa ; Šmak, Milan (referee) ; Buchta, Stanislav (advisor)
The master’s thesis treat of design and appreciation load-bearing steel structure of Motor Show. The object is situated on the lokality Brno. Structure is composed of rolling sections and tubes. Overall height of the structure is 17,395 meters and overall lenght is 32,60 meters. Cross link iscomposed of arched girders panel that are supported on fixed pillars. Theoutside links are composed of panel columns. Load is composed of self weight, additonal imposed load, payload and climate load caused by wind and snow that is reached for given locality.Static rewiew comes out from previous load and it has been accomplished by Scia Engineer 2008 and hand computation.
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The Tool for a Radial Expanding of Tubes by Liquid
Horák, Michal ; Lidmila, Zdeněk (referee) ; Peterková, Eva (advisor)
The submitted diploma thesis is focused on problematic of a radial expanding of tubes. In the first part of thesis, there is a summary of possible theoretical formulas for determining the stress-strain material parameters for biaxial bulging test of tube by liquid. Also there are showed several options for testing tools used in research abroad. The work also contains technological and control calculations for the selected test sample from the tube of steel 17 240 (1.4301). At the end of thesis, there are key points for tool design and there is also presented the proposed the test tool for a radial expanding of test sample of tube to the free space and with firmly fixed the ends of tube in the tool.
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Supporting structure of exhibition pavilion
Novotný, Petr ; Štrba,, Michal (referee) ; Röder, Václav (advisor)
This bachelor thesis focuses on the design and stress analysis of the steel construction of an exhibition pavilion in Brno which utilises tensegrity in its load-bearing system. It also includes the assessment of the main load-bearing construction elements and of the details of selected connections. The thesis also contains the design documentation of the building.
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Analysis of Tube Bulging Process
Zdráhala, Radim ; Císařová, Michaela (referee) ; Peterková, Eva (advisor)
The diploma thesis is focused on the analysis of the behavior of the thin-walled tubular test specimen during the technological test of the liquid draining of the tubes. The test specimen ‘in the form a tube was made of austenitic stainless steel 17 240 (1.4301, X5CrNi18-10). During the experiment, the radial expanding tool was quasi-statically charged by the internal fluid pressure. In the introductory part, the thesis focuses on the stress-strain description of the method of tube bulging and possible ways of detecting the strain of material during forming. The experimental part is primarily focused on the analysis of the test sample that was obtained from the experiment. Theoretical approaches were used to analyze the real test sample to detect strain and stress in material, numerical simulation of the bulge process and 3D ATOS scanning device, which helped clarify behavior tube during bulging process. At the end of the thesis is proposed possible design of the tool. This modification should contribute in the future to the full functionality of the radial expanding tool, or the bulging of the tube by liquid.
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Production and cutting tubes
Drápala, Miroslav ; Henzl, David (referee) ; Peterková, Eva (advisor)
The submitted project created in the bachelor studies of B-STI Machinery engineering is focused on problematics of production and cutting tubes by forming. Based on the research of literature mentioned problematics and own knowledge the bachelor thesis describes several technologies of production and cutting tubes and the tools and machinery related with the described methods.
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Technological tests of pipes
Horák, Michal ; Staněk, Vojtěch (referee) ; Peterková, Eva (advisor)
The submitted project created in the bachelor studies of B-STI Machinery engineering is focus on problematic of technological tests of pipes. Based on the research of literature and internet mentioned problematic the bachelor thesis describes principle of individual technological tests, the procedure for the evaluation and application. For a complete picture of test tubes in the thesis are also given basic information about the mechanical tests.
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Elektronky a jejich využití v současné elektronice
KONZAL, Petr
History of tubes. Described basic types of tubes and their properties. The possibilities of using vacuum tubes are shown on two practical examples. The first example is a fantastron tunable oscillator with a pentode. The second example is a tube monitor with an electrostatically deflected screen, to which a smartphone or set top box can be connected.
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