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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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Classification and modelling of LED light sources in terms of sensitivity to supply voltage fluctuations
Hudáč, Tomáš ; Kukačka, Leoš (referee) ; Drápela, Jiří (advisor)
Cieľom tejto práce je preskúmať a charakterizovať celkovú odolnosť voči flickru v LED svetelných zdrojoch dostupných na súčasnom trhu, a vytvoriť modelu LED svetelného zdroja. Na nájdenie reprezentatívnych vzoriek LED svetelných zdrojov, bola prevedená analýza online trhu, ktorá ukazuje najpredávanejšie typy. Na základe výsledkov z analýzy sa získalo 31 vzoriek. S rôznymi LED technológiami a rôznymi možnosťami regulácie výkonu, napríklad bezdrôtovo alebo triakom. Vykonaním meraní za ideálnych podmienok napájania a rozobraním niektorých vzoriek boli celkovo identifikované 4 hlavné triedy s rôznymi topológiami napájacích obvodov. Ďalej sa vykonali testy ich citlivosti na blikanie a imunitou voči blikaniu. Na základe získaných výsledkov testov bola každá topológia ovládača ohodnotená podľa jej celkovej odolnosti voči blikaniu. V závere práce bol navrhnutý model v Simulinku, ktorý úspešne simuloval IH GF krivky v porovnaní s nameranými hodnotami
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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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