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The effect of lubricant contamination and degradation on lubricating film behavior
Strnad, Jan ; Dzimko, Marián (referee) ; Omasta, Milan (advisor)
Lubrication contamination and degradation is one of the major causes of unexpected failure of tribological nodes. As a result, different levels of maintenance are introduced in practice, leading to a longer service life of the lubricated node. These systems often include sophisticated on-line diagnostic tools that can be used to evaluate a sample of a lubricant using certain variables such as viscosity, number of particles, humidity, dielectric constant, etc. Based on changes of these variables some systems can make corrective measures such as filtering or complete replacement of lubricant. Therefore, the aim of this experimental thesis is to determine the influence of lubrication contamination (solid particles, moisture) and degradation (oxidation) on the lubricating film behavior with respect to its limit bearing capacity. To examine the thickness of the lubricating film, friction and wear, an optical and MTM tribometer, in the ball-on-disc configuration, was used.
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Datalogger or building constructions
Hendl, Adam ; Streit, Jakub (referee) ; Bradáč, Zdeněk (advisor)
The bachelor thesis deals with automated measurement of temperature, humidity and pressure in building structures. In the section dedicated to my work is primarily a process as I progressed in implementing the task. The next section describes the parameters of the components used to implement the measurement and data storage. This work also includes a design of a printed circuit board that includes auxiliary and measuring circuits.
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Temperature and gas leak sensor for caravan
Indrák, Dominik ; Urbanec, Tomáš (referee) ; Frýza, Tomáš (advisor)
This work deal with develop, manufacture and programming of device (choice suitable components, design and manufacture of printed circuit board, write controlling firmware for MCU), which will measure dangerous gases LPG, temperature and humidity in caravans for the company Cutter Systems spol. s.r.o. The radio frequency 863-870 MHz, eventually asynchronous communication UART is used for communication and sending measurement data. In the next section will be describe the develop of the hardware with a device enclosure and firmware writing.
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Moisture Measurements
Hřib, Jan ; Pikula, Stanislav (referee) ; Beneš, Petr (advisor)
This bachelor’s thesis deals with measuring moisture in building materials and it is focused on the capacitive and microwave method. The goal was to find out whether it is possible to employ these two methods to determine moisture distribution in the volume of a measured material. This thesis contains theoretical introduction to the moisture measurement. Practical experiments were made with both capacitive and microwave method. Capacitive method was supplemented with a simulation. Based on the results, I conclude that the capacitive method is not suitable to determine moisture distribution in the volume of a material. The same conclusion was reached in the case of the microwave method, although this conclusion was based more on the theory than on the measurements.
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Study of germination and emergence of industial hemp seeds
ŘEZÁČOVÁ, Veronika
Nowadays hemp is listed among plants with a wide range of potentials. It can be used as a source of fibre, oil, food or medicine. The aim of this work was to investigate optimal conditions for hemp seed germination grown in laboratory as well as field conditions and to propose the application of acquired findings. Hemp seed was split into 2 size groups: above 3 mm and 2 - 3 mm. Divided seeds with the humidity level of 6, 9 and 12% were stored at the temperature of 0, 8 and 20? 1°C for half a year. In 2 months interval, there were evaluated: germination, energy of sprouting, speed of sprouting, further seed viability and laboratory emergence. From next influences were evaluated the influence of dryness, wetting, autotoxicity, exudates of perennial weeds, seed treatment with the infusion of field horsetail and the grown stimulator. The best germination and laboratory emergence had seeds stored at 0°C. Test of seed viability confirmed significant decline in live seeds stored over 4 months at the 0°C temperature. The best germination was achieved by seed size 2 - 3 mm. Hemp requires sufficient amount of water for germination. Leachates from rhizomes of couch grass inhibited germination of hemp by 10%. On the other hand, germination was significantly increased by the stimulator.
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Hodnocení a porovnání sklízecích mlátiček CLAAS TUCANO 440 a CLAAS TUCANO 450 při sklizni obilovin a řepky ozimé
BRÝNA, Ondřej
This diploma thesis deals with the evaluation of CLAAS TUCANO 440 and CLAAS TUCANO 450 combine harvesters for the harvest of cereals and winter rape. It evaluates problems in terms of losses, depending on grain humidity, quality of crushing and spreading plant residues. The thesis sets basic performance and is supplemented by a simple analysis of investment and operating costs. The methodology of the solution was based on own measurements, information obtained from the owner, literature and agricultural standards.
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Meteorological data acquisition and transmission
Holínek, Pavel ; Adamec, Filip (referee) ; Frýza, Tomáš (advisor)
This document is about collection and presentation of meteorological data. To get data was used digital and analog sensors, controled by the microcontroller ATmega16. Meteostation has 2 modules. The first is designed for monitoring of indoor values and displaying data, the second module is for outdoor measurements. Next research was focused on the comparison with other meteorological stations and more expansion options.
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Biomass preparation and combustion technologies
Venhoda, Tomáš ; Recman, Milan (referee) ; Juřena, Tomáš (advisor)
The aim of this work is to provide for background research about preparation and combustion of biomass. Technologies for preparation of biomass including ingathering prior to combustion are described in the first part of this work. Different ways combustion of biomass and comparison of different types of grates are in the second part of the thesis.
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Reconstruction of the Knurr palace, Fulnek
Kvapilová, Vendula ; Cigánek, Jiří (referee) ; Novotný, Miloslav (advisor)
This diploma thesis deals with the reconstruction and rehabilitation of a real cultural monument in Fulnek. It is a four-winged object with almost rectangular atrium. The main subject of the diploma thesis is the change in the use of the building and the proposals for remediation of damp walls. Knurr's palace has three above-ground floors and is non-decked, covered by a classic shell with fiber cement. The use of the object is mainly designed as a civic amenities, now the building is not used. The building is located in close proximity to the slope and the building is adjacent to the building. The project is solved at the level of the documentation for construction.
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