Online Control and Monitoring of Key Engines on Furnaces

Jelikož se stroje neustále opotřebovávají, je třeba je udržovat ve funkčním stavu, aby správně a dlouhodobě pracovaly. Proto se v této diplomové práci budu zabývat, jakým způsobem lze zajistit online monitoring na klíčových motorech u pájecích pecí. Zaměření tedy bude na diagnostiku těchto motorů a v jakém jsou stavu. Tento diagnostický stav, který by mohl být snímán pravidelně něbo průběžně online, by sloužil jako zhodnocení pro současný stav motoru a jeho opotřebení, popřípadě ke kontrole běhu motoru. A následné navrhnutí online monitoring systému, který by mohl být aplikován v praxi na měřené zařízení pro zkvalitnění údržby a prodloužení životnosti.Since machinery is always getting worn out, it needs to be kept in a functioning state, so that they have long lifetime and work correctly. That’s what I am going to be dealing with in this thesis, in what ways there can be maintained online monitoring of key engines on furnaces. So the focus will be the diagnostics of these engines and what their current condition is. This diagnostic condition, which might be monitored regulary or continuously online, would serve as a benchmark for current condition of the engine and it’s wear, eventually to check the running of an engine. And following with design of a online monitoring system, which could be applied in practice on the measured device to increase quality of maintenance and prolongation of lifetime.340 - Katedra výrobních strojů a konstruovánívýborn

Proposal of an Unconventional Ultra Lightweight Wings Design with the Classic Profile

Import 02/11/2016Ultra lehká letadla se v poslední době velmi rozmohla díky kompozitním materiálům, které mají hned několik výhod oproti předchůdci, což bylo hlavně dřevo. A to díky mnohonásobně větší pevnosti se zachováním nízké hmotnosti, dále díky lepší odolnosti proti korozi, UV záření, spolu s výbornou tepelnou izolací a nakonec také díky velmi vysoké ohnivzdornosti. Proto se budu v této bakalářské práci snažit najít nejvhodnější konstrukci křídla spolu se správnou volbou materiálu tak, aby výsledný výrobek dosahoval standardů v ultralehké kategorii. Ve výsledku bylo vyrobené křídlo velice lehké, avšak přenos sil z křídla na centroplán byl jediným slabým článkem v této konstrukci.Ultra light planes have abounded recently thanks to composite materials, which has several advantages against its predecessor, which was mainly wood. And thanks to multiply higher strength with preservation of low weight, then thanks to better endurance against corrosion, UV rays, together with great thermal insulation and last of all thanks to very high fireproofness. Thats why I will be trying to find the most suitable construction of wing along with the right choice of materials, in a way so that the final product would reach ultra light standards. In the outcome the finished wing was very light, although the force transfer was the only week link in this construction.342 - Institut dopravyvelmi dobř

Correlative microscopy of radial junction nanowire solar cells using nanoindent position markers

Radial junction solar cells with only 100 nm thin amorphous Si absorber layer deposited on Si nanowires can be prepared by a relatively simple and low cost thin film technology. Metal assisted Si nanowire growth leads to a disorder in nanowire orientations, lengths and shapes, which is then preserved by the conformal absorber layer. Interestingly high conversion efficiencies are reached in spite of the disorder. In this contribution we describe microscopic methods aiming at exploring the role of structural disorder on the local electronic properties of radial junction cells. A method for locating the same nanostructure in different microscopes, using the nanoindentation marks for orientation on the sample, is described. Indents can be easily located by optical microscopy, scanning electron microscopes or scanning probe microscopes. Groups of three indents arranged in triangles can serve as coordinate systems for triangulation on samples, enabling correlative microscopy even in instruments which were not designed for it. This approach also enables localization of the same positions on samples even after repeated mounting in various microscopes with a precision better than 50 nm. This is possible even on samples without any structural features, as demonstrated for the flat silicon thin films prepared by solid phase crystallization, for which we have correlated crystallographic maps from electron backscattering diffraction and conductivity maps by atomic force microscopy. The technique allows observing the same locations before and after technological steps, as shown for the hot wire chemical vapour deposition of carbon nanowall

Correlative microscopy of radial junction nanowire solar cells using nanoindent position markers

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