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Design of wire feeder for TIG process
Kozumplík, Filip ; Slováček, Marek (referee) ; Kubíček, Jaroslav (advisor)
This thesis describes the design of a wire feeder for TIG welding, its drive and control electronics, capable of reacting to changes in welding parameters. First, different types of drives were compared and their suitability for the wire feeder was evaluated with regard to their regulation, precision, speed and torque. A stepper motor with a planetary gearbox was selected. Then, a shaft adaptor has been designed, coupling the gearbox to the wire feed. Based on strength calculations were obtained the requirements for mechanical properties of material for its production. An adaptor body from an aluminum alloy has been created, housing the shaft adaptor and to which the gearbox and wire feed are mounted. Also, the control Electronics have been designed. The control system is split into several boards, each fulfilling a specific purpose. A circuit has been developed, capable of a safe measurement of arc voltage and able to withstand the high frequency ignition pulse. In addition, a circuit for protection of the drive against said pulses, circuit for detecting contact between the filler wire and the workpiece, main control board with a microcontroller and a control panel have also been designed.
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The development of mounting optical sights for a sports self-loading pistol
Čaboun, Petr ; Jankových, Róbert (referee) ; Polzer, Aleš (advisor)
This bachelor thesis deals with the development of a mounting interface for reddot sights designed for sports semi-automatic pistols. The aim of this thesis was to design a reliable mounting system that would allow precise, secure, and repeatable placement of the reddot sight on the pistol. The first part of the work focuses on existing mounting systems and identifies key requirements for the solution developed in this thesis. A market survey of collimator sights was also conducted in the first part, and suitable models for installation onto the the mounting interface that will be developed were selected. Subsequently, a design of the new mounting interface, including drawing documentation, was created. In final part the developed mounting interface solution is presented. The result of the work is a mounting interface for reddot sights that enables their installation onto semi-automatic sports pistols.
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Comparison of photovoltaic and photothermal systems for hot water heating in an apartment building
Švéda, Richard ; Lachman, Jakub (referee) ; Toman, Filip (advisor)
This bachelor's thesis examines the comparative merits of photovoltaic and photothermal systems for domestic hot water heating. The introductory section provides an overview of solar radiation, its origin, and its striking the Earth´s surface. Thereafter, both systems are subject to detailed analysis and calculations. These systems are designed for a specific residential unit and evaluated from technical, financial, and operational perspectives. Based on these calculations and analyses, the most suitable choice for the given location is recommended.
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Analysis and design of the use of the existing building in the village of Stařeč
Janovská, Dagmar ; Hlavinková, Vítězslava (referee) ; Čech, Josef (advisor)
This diploma thesis introduces an analysis and a suggestion for a new usage of a structure, which is located in Stařeč, through the method of highest and best usage, otherwise known as HABU. The first part focuses on explaining terms used in the thesis. Afterwards, methods and their reasonings are explained. The next part introduces suggestions for a new usage of the structure, which are examined by HABU methods, inappropriate suggestions are eliminated. The chosen suggestion reaches the best and highest usage for Stařeč.
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Study of runoff conditions in selected sub-basins of the Oskava River
Gogela, Martin ; Pavlík, František (referee) ; Dumbrovský, Miroslav (advisor)
The subject of this bachelor thesis was to prepare data in the arcmap program, then to prepare an analysis of the area of interest. Based on this analysis, to find the critical profiles and determine the flood wave characteristics for their catchment area. These characteristics are processed using the DesQ program. Based on the climate change, the flood wave characteristics for the critical points' catchments were calculated for a design rainfall that simulates the projected condition in 2050. Furthermore, a design of measures for the area of interest was carried out. This design was compared using the flood wave characteristics and its effectiveness for the current and future condition was evaluated.
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Design of powder preheating for cold spray technology
Kalina, Jan ; Čupera, Jan (referee) ; Řehořek, Lukáš (advisor)
Cold spray is a technology that ranks among the thermal coatings. Its main idea is to prevent both the sprayed and the underlying material from reaching the melting temperature in order to reduce the level of surface oxidation. Cold spray is a relatively young technology that is still being researched. The effect of preheating the sprayed material on the material characteristics of the cold spray is one of the research questions. As part of this work, a device for preheating the powder to temperatures of up to 650 °C is designed in such a way as to minimize interference with the current construction of the Cold Spray workstation at the ÚMVI FSI BUT in Brno. The design is based on significant simplifications of the thermal model of the preheating device and heat losses. In the theoretical part, the reader was introduced to the history of Cold Spray, the effects of various technological parameters of Cold Spray on the resulting spray. Furthermore, the requirements for the preheater device were discussed, several variants of the device design were proposed, and the equations used for the device design were written. In the practical part, the required data for the design of the equipment is obtained for the required materials of the sprayed material, different temperatures, and other input parameters of the Cold Spray injection with the help of equations from the theoretical part. Based on them, the final design of the preheater device is compiled.
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Construction of a small portable 3D printer
Netušil, Jan ; Vyroubal, Petr (referee) ; Bayer, Robert (advisor)
The study is dedicated to the description of 3D FDM printing technology, compares different types of 3D FDM printers and analyzes key components, especially those necessary for a stable portable 3D printer design. It also includes the specific design of the portable 3D FDM printer solution, its assembly, the actual enhancement of the design, and the design and implementation of the braking arresting elements. It also addresses the printing testing of advanced construction materials suitable for 3D FDM printing and provides a cost estimation and evaluation of the cost-effectiveness of building a portable 3D FDM printer.
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Road bridge over a local stream
Vondráček, Jan ; Zich, Miloš (referee) ; Koláček, Jan (advisor)
The topic of this bachelor thesis is design of a road bridge across a valley with stream. For more detailed design was selected variant of one span cable-stayed bridge, from two variants of bridges with different static solutions which were created. Internal forces were determined by software SCIA Engineer 22.0. For analyse the structure were created three computational models – slab model, spatial bar model and slab-wall model. Structure was assessed for limit states according to currently valid standards.
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Design and implementation of a platform for control LLC-type inverter with a wide input supply voltage range using a FPGA circuit
Pokorný, Ondřej ; Levek, Vladimír (referee) ; Prokop, Roman (advisor)
This master’s thesis deals with the emulation of LLC converter control with a wide input voltage range using a created emulation platform. The first part of this work is focused on the design of resonant converters with a wide input voltage range. Based on theoretical knowledge, an adjustment of the emulation LLC converter is made. The converter modification is concluded with a simulation, where the correctness of the design and the fulfillment of the ZVS parameter in the entire input voltage range are verified. In the next part of the work, an analysis of the control issues of resonant converters, more precisely LLC type resonant converters, is carried out. The acquired knowledge is used for the design of a new emulation platform, which will serve for the emulation of LLC converter control with a wide input voltage range. The last part of the work is the creation of an emulation program for FPGA in SystemVerilog language. The work is concluded by verifying the functionality of the emulation on physical hardware.
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Exotarium ZOO Brno
Kučera, Jiljí ; Wittmann, Maxmilian (referee) ; Šindlar, Jiljí (advisor)
The topic of the bachelor thesis is the design of a pavilion for the Australia - New Guinea exhibition in Brno Zoo. The building serves mainly as an exposition and home for exotic species of birds, small mammals and fish. The building should meet all the conditions of buildings for the public, working conditions for employees and animal welfare. The area under consideration is located in the premises of the Brno Zoo, in the northern part of the district of Bystrc. The construction site is located roughly in the middle of the zoo at the crossroads between the Tropical Pavilion and the African Village. The relatively sloping, irregular plot is accessible from the north and east sides by a campus road. The kangaroo enclosure is directly adjacent to the west side, while the bison and camel enclosures are located to the north, across the road. The resulting design consists of a two-storey building that follows the contour line of the site. It is a building composed of two regular masses of rectangular plan. The upper smaller mass is superimposed on the lower larger mass. The pavilion includes indoor and outdoor aviaries, terrariums, aquariums, staff facilities, animal facilities and food preparation. The facade of the Exotarium imitates the red rock typical of Australia. It is made up of an ETICS system to which a moulded polystyrene layer and a painted surface will be added. An extensive green roof with aviaries is proposed on the main building. The design includes a small plaza to provide shade for visitors. Two buildings are proposed within the square - refreshments and public toilets. The bachelor thesis is based on documents in the form of assignment, dwg drawing of the cadastral situation and architectural study from the course BGA036 - Architectural Atelier 5.
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