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In-System Programmer for ICSP Interface of Pic Microcontrollers
Doležal, Pavel ; Strnadel, Josef (referee) ; Šimek, Václav (advisor)
This thesis is dealing with a design of programming device with the expected use for Microchip PIC 16F and 18F microcontrollers. Individual chapters are dedicated to aspects of circuitry, printed circuit board design and user software tools. The proposed device is based on PIC18F67J50 microcontroller, graphic LCD diplay, and memory card interface. Design can be easily adjusted in order to support wide range of devices. Microchip's In-Circuit Serial Programming protocol is described with focus on previously mentioned family of devices. Working prototype of the programmer is attached to this thesis as a demonstration of a practical outcome.
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Structure and properties of magnesium alloys Mg-Ca-Zn
Hlavnička, Jiří ; Pacal, Bohumil (referee) ; Doležal, Pavel (advisor)
This master’s thesis deals with design and preparation of a new biodegradable magnesium alloy based on Mg-Ca-Zn. Based on information from literature, the Mg-3Zn-2Ca alloy was designed. The base material was produced by gravity casting and the evaluation in the as-cast and heat treated state was performed. For preparation of the experimental material, following methods were designed: squeeze casting, hot rolling and the ECAP. During preparation by hot rolling, no optimal conditions were found and significant cracks occurred in both as-cast and heat treated material. In the case of experimental material, prepared by the ECAP method with back-pressure, better combination of stress-strain properties was observed. Also the squeeze casting method showed improvement; especially the amount of casting defects was eliminated. The evaluation of microstructure and mechanical properties was performed by the light and scanning electron microscopy, RTG phase analysis and the tensile and compression tests.
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Detached house with design office
Doležal, Petr ; Šoulová, Eva (referee) ; Utíkalová, Ivana (advisor)
The object of this bachelor thesis is to elaborate a project documentation of a detached house with a design office. This is a two-storey brick building with a partial basement, which is in a flat terrain. The roofing over the second floor is designed from the single-shell roof. The building is designed in the system Porotherm. The process layout allows a comfortable living for a family with 4-6 members. The design office is for 6 workers
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Manufacture of massive castings and their defects
Doležal, Petr ; Martínek, Ludvík (referee) ; Záděra, Antonín (advisor)
Object of this master’s thesis is accomplished analyze the range of foundry of steel ŽĎAS a.s., Zdar nad Sazavou and make the type massive steel castings and analysis of existing technology foundry and metallurgical defect. The beginning of this master’s thesis is dedicated to the manufacturing of steel foundries range ŽĎAS a.s., Zdar nad Sazavou. The following section is devoted to manufacturing technologies for the production of massive steel castings. In the final part of this thesis are described metallurgical and foundry defects of the typical castings of steel foundry and proposals to eliminate these undesirable defects. End thesis includes a summary of the results and trends in the development of research in the production of massive steel casting.
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Conversion coatings and their characterisation
Březina, Matěj ; Doležal, Pavel (referee) ; Zmrzlý, Martin (advisor)
Aim of this study is to improve corrosion resistance of magnesium alloy AZ91 by conversion coatings. Influence of alloy microstructure on conversion coating growth and corrosion resistance was evaluated. Properties of pure magnesium and magnesium alloy AZ91 as well as the influence of alloying elements on properties of this alloy are described in theoretical part. Recent results of corrosion protection by conversion coatings on AZ type magnesium alloys are summarised in recherché part. Practical part focuses on preparation of hexavalent chromium based conversion coating and phosphate-permanganate based conversion coating on as cast AZ91 magnesium alloy, these coatings were subsequently applied on annealed AZ91 magnesium alloy. Corrosion protection of the coatings prepared on as cast and annealed alloy was evaluated by potentiodynamic measurements and testing in neutral salt spray. Furthermore the influence of plasma activation on phosphate-permanganate coating surface was studied.
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Preparation and properties of porous zinc material
Ryšťák, Jaroslav ; Fintová, Stanislava (referee) ; Doležal, Pavel (advisor)
Bachelor thesis is focused on preparation of bulk material prepared from zinc powder by cold pressing followed by sintering. Topic of the work includes characterization of prepared material depending on the choice of the compaction process conditions. Bulk material is characterized by physical-mechanical tests, structure and porosity. Thesis solving and focuses on study and control of processes during bulk material preparation and description of the processes from physically-chemical point of view of the structure creation and final material properties.
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Powder metalurgically prepared materials based on Zn and Ca
Morcinek, Tomáš ; Hasoňová, Michaela (referee) ; Doležal, Pavel (advisor)
The topic of this bachelor thesis is a process of preparation and characterization of bulk material from zinc and calcium powder mixture by hot pressing. Materials thus prepared were evaluated in terms of their microstructure and physical-mechanical properties. The influence of calcium content in the material on physical-mechanical properties of the resulting structure was observed. The solution is focused on exploration of the influence of material composition in the process of preparation of bulk material, and description of these processes from the physical-chemical point of view on the structure formation and the resulting properties of the material.
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Infiltration - the elementary hydrological process
Salač, Jan ; Doležal, Petr (referee) ; Kameníčková, Ivana (advisor)
The bachelor thesis deals with the evaluation of water infiltration into the soil in the area of interest of the village Šakvice. Measurements were carried out on 13 May 2009 and 10 September 2009 on arable land with convential tillage (with ploughing). For measurements were used double ring infiltrometers. To evaluate the cumulative infiltration and infiltration rate were used equations of Kostjakov, Mezencev, Philip and three-parameter equation of Philip‘s type. The results were processed numerically, plotted and then compared.
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The Rewarding System Change Proposal for the Company LIKO SÁDEK s.r.o.
Doležal, Petr ; Korotvička, Josef (referee) ; Martinovičová, Dana (advisor)
Bachelor´s thesis meaning about reward current system in company for the better work productivity and motivation to work. The first part of this thesis focuses on explanation of the terms - compensation, wages, motivation and their inter-relationship. In the second part I evaluate contemporary remun eration system on the basis of the results arising from the analysis, and I review the satisfaction of the employees with it. From these results due to achieved knowledge I recommend changes that I include into the contemporary remuneration system.
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