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Measurement and product inspection using 3D manipulator
Klimeš, Petr ; Čala, Martin (referee) ; Beneš, Petr (advisor)
In thesis there is research of 3D scanning methods in order to create method for contact and non-contact scanning of windsurfing boards. There is also research of measuring accuracy and repeatability of 3D manipulators. Repeatability is then measured for given manipulator and contact and non-contact sensors are tested for scanning windsurfing boards. Measured data is processed and compared to original reference data.
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Design of mechanical subsystem of tester for touch screen devices
Kopčil, Tomáš ; Venglář, Vojtěch (referee) ; Krejsa, Jiří (advisor)
Cílem této práce je navrhnout a sestavit systém pro automatizované nepřetržité testování dotykových displejů. Práce je zaměřena na mechanickou část, koncový efektor a motorizaci. Navržený koncový efektor je funkční na kapacitních dotykových displejích, přičemž snímá přítlačnou sílu působící na displej. Pohyb zařízení je zajištěn lineárními pohony s ozubeným řemenem, které jsou polohovány krokovými motory. Pro komunikaci s budiči motorů přes SPI protokol a pro samotné řízení motorů byla vytvořena knihovna zajišťující jejich lichoběžníkový rychlostní profil při pohybu. Sestavený testovací systém byl podroben 24 hodinovému spolehlivostnímu testu, během kterého byla ověřena jeho funkčnost, přesnost a opakovatelnost. Bylo také potvrzeno, že splňuje veškeré požadavky.
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Quality assessment of pneumatic linear drives
Pecl, Tomáš ; Jankových, Róbert (referee) ; Budík, Tomáš (advisor)
This Master’s thesis deals with the evaluation of quality pneumatic linear drives. The theoretical part describes the problems in the field of pneumatic cylinders and statistical methods to perform the analysis. The practical part includes the execution and evaluation of the statistical analysis of the measurement process and pneumatic cylinders, also brings recommendations to optimize the measurement process. The methods used included analysis Gage R & R, Analysis control charts and data analysis using the process capability. The study was made for the purpose of improving test equipment Norgren Ltd. Used computer programs was Minitab Statistical Software and MS Excel.
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Comparative tool for datasets using method IELF
Podjukl, Zdeněk ; Miloš, Jiří (referee) ; Kadlec, Petr (advisor)
This thesis deals with a realization of MATLAB IELF method solver. IELF method was designed for comparison of two datasets. The method is mostly used in EMC (Electromagnetic Compatibility) measurements and simulations. Thesis consists of 4 chapters. First one showcases some of the most widely used comparison methods, the second describes looks and behavior of the aplication, third contains description of program code and the last one deals with calculations testing.
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Long-term accuracy and repeatability testing of linear positioning devices
Konečný, Mikuláš ; Šubrt, Kamil (referee) ; Houška, Pavel (advisor)
Measuring the real performance of a linear motion actuators plays an important role in their design. It enables a thorough understanding of key elements of its design, which might cause unprecise actuation. This paper in cooperation with Thermo Fisher Scientific Brno s.r.o. aims to test one of its devices. The device is a single axis linear actuator that moves several different detectors inside a scanning electron microscope chamber. The main goal of experimental measurements is to evaluate the performance of anti-backlash nuts and their impact on precision and repeatability.
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Repeatability in the behavioural analyses
Vobrubová, Barbora ; Frynta, Daniel (advisor) ; Sedláček, František (referee) ; Špinka, Marek (referee)
This thesis is focused on the repeatability of behaviour, a suitable tool for quantification of personality, which is defined as consistent inter-individual differences. It contains five studies, which view repeatability and personality from different angles. In the first study, I focus on the description of the history of personality studies, the most often mammalian species used in these studies, and I present a metaanalysis of the published works. The highest repeatability was found in activity, the lowest in aggressivity and exploratory behaviour. The following two studies concern the expressions of personality in exploratory behaviour of the black rat (Rattus rattus). The first one analyses habituation in the course of repeated testing, and found the most prominent habituation in head-dipping (looking in the holes) in the hole board test. This study also demonstrates the differences between different approaches to estimating repeatability, when the inclusion of systematic effect of habituation increased the repeatability estimates. The subsequent study measured the levels of fecal glucocorticoid metabolites (fGCM), their diurnal cycle and the association with exploratory behaviour. fGCM showed themselves to be an interindividually variable characteristic, which is well repeatable, despite the...
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Automation of metallographic sample cleaning process
Čermák, Jan ; Ambrož, Ondřej ; Jozefovič, Patrik ; Mikmeková, Šárka
Specimen cleaning and drying are critical processes following any metallographic preparation steps. The paper focuses on automation by reason of absence of the process repeatability during manual sample handling. An etchant or electrolyte results in inhomogeneous surface quality because the solution runs off the specimen surface during its removal from the beaker. High-quality specimen cleaning is absolutely crucial for the acquisition of the specimen suitable for characterization by a scanning electron microscope operated at very low landing energies of the primary electrons (SLEEM). The SLEEM technique is a powerful tool for the characterization of advanced steels, as described by many scientific papers. The SLEEM requires the specimen absolutely free of water and any organic residues on the surface. This work presents a novel unique apparatus enabling automatic specimen cleaning and drying after the etching or electropolishing processes. Automation reduces the influence of dependent variables that would be introduced into the process by the metallographer. These variables include cleaning time, kinematics, and motion dynamics, but the process can also be affected by variables that are not obvious. Performed experiments clearly demonstrate our in-house designed apparatus as a useful tool improving efficiency and consistency of the sample cleaning process. The high quality of the specimen surface is verified using a light optical microscope, an electron scanning microscope, and above mentioned SLEEM technique.
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Design of mechanical subsystem of tester for touch screen devices
Kopčil, Tomáš ; Venglář, Vojtěch (referee) ; Krejsa, Jiří (advisor)
Cílem této práce je navrhnout a sestavit systém pro automatizované nepřetržité testování dotykových displejů. Práce je zaměřena na mechanickou část, koncový efektor a motorizaci. Navržený koncový efektor je funkční na kapacitních dotykových displejích, přičemž snímá přítlačnou sílu působící na displej. Pohyb zařízení je zajištěn lineárními pohony s ozubeným řemenem, které jsou polohovány krokovými motory. Pro komunikaci s budiči motorů přes SPI protokol a pro samotné řízení motorů byla vytvořena knihovna zajišťující jejich lichoběžníkový rychlostní profil při pohybu. Sestavený testovací systém byl podroben 24 hodinovému spolehlivostnímu testu, během kterého byla ověřena jeho funkčnost, přesnost a opakovatelnost. Bylo také potvrzeno, že splňuje veškeré požadavky.
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