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Technological analysis of the usability of new thermosetting materials for the construction of headlamps
Rašner, Martin ; Kolář, Michal (referee) ; Píška, Miroslav (advisor)
The diploma thesis presents the usability of a new thermosetting material BMC for the construction of a car headlight. In the theoretical part there are described headlights, basic characteristics and properties of plastics focussing on polymer composite materials and material testing. The practical part deals with the processing of test samples for mechanical testing by compression moulding and also with the production of real samples of reflectors and carrier frames by injection moulding. The evaluation is based on comparison of the results of the performed tests of alternative material and the currently used BMC TETRADUR TD 492/2 in HELLA Autotechnik Nova s.r.o. Basic physical-mechanical properties such as strength, stiffness, toughness and hardness are tested and monitored. The reflectors and carrier frames are assembled into the headlight and then tested according to legal and customers´ requirements for climate and vibration resistance and photometry.
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Placement Optimization of Projector Lens
Bezděk, Matěj ; Važík, Jiří (referee) ; Novotný, Pavel (advisor)
This diploma thesis deals with the creation of engineering design of holder of projector lens. The thesis is created in cooperation with department of development in Varroc Lighting Systems, s.r.o. Initial part provides a brief description of the development of lighting technology used in car´s headlamps. The following part describes solutions currently used in clamping the lens in holder. The main part of the thesis focuses on the design of holder of projector lens itself. Projector lenses testing provide critical values of cohesive failure of the lens material, which cannot be exceed during the process of lens fitting and its subsequent clamping. In the final part the engineering design is verified and optimized using finite element analysis.
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Directional antenna for 60 GHz frequency band
Kratochvíl, Jakub ; Pítra, Kamil (referee) ; Láčík, Jaroslav (advisor)
The aim of this diploma thesis is to study the possibilities and problems of low-profile antennas and subsequently to design a directional antenna with spherical reflector for millimeter wavelengths. The theoretical part deals with basic information about horn and reflector antennas, and about SIW technology. In addition, the thesis deals with the specific design and modeling of the antenna using CST Microwave Studio. The simulated design achieved a sufficient bandwidth to cover ISM (57 GHz to 64 GHz) with gain 13.6 dBi at 60 GHz frequency. On fabricated antenna, the antenna impedance ratios were worse and the target bandwidth was not reached. Antenna gain was 14.33 dBi at 60 GHz frequency.
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The effect of manufacturing inaccuracies on the final light intensity distribution of an automotive headlamp
Březnová, Tereza ; Lysa, Bohuslav (referee) ; Novotný, Jan (advisor)
The thesis deals with the issue of headlamp defects arising during production and their impact on the resulting light trail. The thesis describes and analyses defects arising during individual correction loops. Their analysis was carried out in order to provide measures for other projects. The main defects that have been assessed include the position of the light source, the quality of the optical surfaces and the associated quality of the plating, inaccuracies of the optical surfaces, dimensional variations due to installation technology and defects on the cover glass. The proposed measures concern the pressing tool, accuracy of machining and surface polishing. The thesis also includes designing solutions for quick identification of the surface quality of the cover glass by remote projection. Individual defects were described by their originators, their seriousness and their reparability. Based on this information, recommendations for production are proposed.
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Design of projection illuminator
Přikrylová, Ivana ; Vacula, Daniel (referee) ; Antoš, Martin (advisor)
The aim of this diploma thesis is to design a suitable reflector concentrating a light beam into a circular hole in a gobo. The light beam behind the screen should have good efficiency and at the same time good homogeneity. For the reflector design and analysis a software for designing optical systems called LightTools was used. The reflector was designed by six different methods. Several smooth and several faceted reflectors were designed. The selected reflector was analyzed in combination with a varifocal lens. For selected reflector was designed mechanical store with respect to the anticipated operating conditions. This thesis serves as the basis for the producing of the reflector.
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Production of a headlight replica
Hanzelka, Jakub ; Císařová, Michaela (referee) ; Žák, Ladislav (advisor)
The thesis deals with the design of a headlight reflector production. The sheet thickness of DC04 material is 0,6 mm. Various technologies were evaluated, and hydromechanical deep drawing was chosen due to the complexity of the component shape. The semi-finished product will be a circular sheet with a radius of 117 mm, which will be cut out from metal sheets measuring 2500 x 1500 mm. The component will be manufactured in a single drawing operation. The total forming force is calculated 171 kN. Subsequently, a simulation of the drawing process was conducted, confirming the manufacturability of the part. The maximum forming force reached 226,6 kN. The ZH 30 press was chosen, and the tool design was proposed.
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The effect of manufacturing inaccuracies on the final light intensity distribution of an automotive headlamp
Březnová, Tereza ; Lysa, Bohuslav (referee) ; Novotný, Jan (advisor)
The thesis deals with the issue of headlamp defects arising during production and their impact on the resulting light trail. The thesis describes and analyses defects arising during individual correction loops. Their analysis was carried out in order to provide measures for other projects. The main defects that have been assessed include the position of the light source, the quality of the optical surfaces and the associated quality of the plating, inaccuracies of the optical surfaces, dimensional variations due to installation technology and defects on the cover glass. The proposed measures concern the pressing tool, accuracy of machining and surface polishing. The thesis also includes designing solutions for quick identification of the surface quality of the cover glass by remote projection. Individual defects were described by their originators, their seriousness and their reparability. Based on this information, recommendations for production are proposed.
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Interpreting Narrative Techniques in Moby-Dick
Sedláček, Martin ; Procházka, Martin (advisor) ; Robbins, David Lee (referee)
Thesis Abstract The objective of this thesis is to map the narrative strategies of Herman Melville's Moby-Dick. By applying different narrative theories to Moby-Dick, it explores and assesses mainly the narrative reliability (Wayne C. Booth) and the narrative situation (Franz K. Stanzel). Ishmael is generally considered to be an example of an unreliable narrator and in this thesis manifestations of his unreliability are evaluated. Special attention is devoted to the inconsistencies in the narrative (e.g. recurring disappearances of Ishmael, shifts in focus on some of the characters, complete disappearances of other characters) and their treatment, taking the general academic consensus into account. Such phenomena are discussed as deliberately and consciously incorporated into the narrative, rather than being a result of a precipitated writing process. Apart from the formal inconsistencies, the narrative also includes incongruities of thematic nature (e.g. questionable value-scheme according to Rimmon- Kenan). By employing Stanzel's narrative theory, the thesis discusses Ishmael's oscillation between "narrator" and "reflector," with special focus on the dramatic chapters. Using both of these conceptions, Moby-Dick is assessed from two different perspectives, hopefully shedding some light on the complex...
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