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Embedded System for Water Level Monitoring
Hanák, Jiří ; Kašpárek, Tomáš (referee) ; Šimek, Václav (advisor)
This work is dealing with the design and implementation of an embedded water level monitoring system. The purpose of the system is to control the filling of a tank based on the water level. First of all, the attention is given to the survey of existing measurement techniques and selection of the appropriate sensing elements for a given scenario. In fact, the embedded system is using TFmini and JSN-SR04T-2.0 contactless sensors. The system is controlled by STM32F0 microcontroller from STMicroelectronics programmed in C using HAL abstraction layer. The measured results are sent via Wi-Fi SoC ESP8266EX to the Python server that is used for processing and demonstratiton purposes.
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Design of laminate handlebars for mountain bikes
Hanák, Jiří ; Ševeček, Oldřich (referee) ; Polzer, Stanislav (advisor)
This bachelor’s thesis describes design of laminate handlebars for mountain bikes. The first part describes the mechanical properties of composite materials, with the emphasis on fiber composites. The algorithm for acquiring material characteristics of fiber composite by analytical method is presented. In the next part, it is shown how to control the direction of fibers in lam-inate in the finite element calculations and its impact to resulting stresses in the material. The aim of the last part is design geometry model of laminate handlebars for mountain bikes with following stress – strain analysis by FEM and software ANSYS. The analysis is performed for static loading.
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Platform for Measurement of Atmospheric Quantities
Hanák, Jiří ; Vlk, Jan (referee) ; Chudý, Peter (advisor)
This work is dealing with the design and implementation of an embedded system for aerology measuring. The aim of the system is to monitor atmospheric states during an ascent in the suspension under an meteorological balloon. First of all, attention is given to the Earth's atmosphere and its quantities, then an overview of existing systems for performing aerological measurements. The core of the work is focused on the choice of measurement techniques and the selection of suitable measuring elements for a given scenario. The aerological probe is using atmospheric sensors HIH-8131-021-001, MS5611-01BA03 and PT1000-550 for temperature sensing, while GNSS data is received using the MAX-M8Q-0 module and the measured data is stored on a microSD card and transmitted in parallel using the MTX2-434.650-10 radio module. The system is controlled by STM32L1 from STMicroelectronics programmed in C using HAL abstraction layer.
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DPF for CI Engines
Hanák, Jiří ; Řehák, Kamil (referee) ; Dundálek, Radim (advisor)
This bachelor thesis describes formation of harmful particles during combustion cycle of diesel engine and blocking its spreading into atmosphere using diesel particulate filters. First part of this thesis looks into types and mechanisms of formation of these particles including regulations of its maximal value in atmosphere thanks to emission regulations. Then this thesis summarizes principles of diesel particulate filters´ functioning, their types, methods of construction and regeneration. Also, there are described systems of diesel particulate filters with diesel engine and practical solutions. In conclusion, this thesis deals with problematic combinations of diesel particulate filters and diesel engines and outlines possible future development.
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Numerical simulation of failure of ceramic foams upon mechanical loading
Hanák, Jiří ; Skalka, Petr (referee) ; Ševeček, Oldřich (advisor)
The master’s thesis deals with a numerical simulation of failure of ceramic foams with open-cell structure and with understanding of conditions required for the failure of the structure under various mechanical loading conditions. To this purpose, the so-called stress-energy coupled criterion was utilized. The motivation for this thesis was to create a model able of the most accurate prediction of the ceramic foam strength in comparison with experimental observations. First part of the thesis is focused on the theoretical background required for solving the problem. More specifically there are mentioned methods of the foam material modelling, Linear Elastic Fracture Mechanic (LEFM) and coupled stress-energy criterion used for definition of the crack initiation. In the second part of the thesis, numerical Finite Element Analyses (FEA) whose main purpose was to determine critical conditions necessary for the initiation of strut failure within the foam structure, were performed. These pieces of knowledge were then used for creation of the numerical simulation algorithm of the mechanical test of foam material with regular cell pattern. Outputs of numerical simulations were at the end of this work compared with experimental results (of the compression test) made on the real Al_2 O_3 foams prepared by 3D printing technology and provided by the Institute of Physics of Materials Czech Academy of Science. It can be concluded that a good agreement between results of both approaches was reached and the prediction of the ceramic foam mechanical strength using the developed model is in the meanwhile the most accurate estimation from recently published approaches.
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Visualization and simulation methods of Solar System bodies
Hýroš, Andrej ; Hanák, Jiří (referee) ; Novák, Jiří (advisor)
Táto práca sa zaoberá vývojom programu na simuláciu a vizualizáciu pohybu n telies podľa Newtonových zákonov. Vstupom je zoznam telies a ich počiatočné podmienky. Po dokončení simulácie je vzájomný pohyb telies celého systému animovaný v programe s grafickým užívateľským rozhraním a je uložený súbor s priebehom simulácie. Počas simulácie sú riešené diferenciálne rovnice prvého rádu. V práci boli implementované viaceré algoritmy numerickej integrácie, ktoré umožňujú používateľovi zvoliť si vhodný algoritmus pre potreby jeho simulácie a dosiahnuť tak optimálny priebeh simulácie. Program bol prehlásený ako validný po porovnaní výstupu programu s dátami od NASA.
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Design of a prototype device for assembling cooler inserts
Hanák, Jiří ; Ramík, Pavel (referee) ; Bazala, Jiří (advisor)
Tato diplomová práce se zaměřuje na návrh nového a vylepšeného skládacího zařízení určeného pro skládání vložek chladičů v prototypové výrobě s důrazem na zvýšení efektivity procesu skládání a snížení výrobního času. V rešeršní části této diplomové práci jsou popsány rozdílné typy chladicích systémů včetně jednotlivých komponentů obsažených v chladících systémech s hlavním zaměřením na konstrukci chladiče. Dále jsou popsány rozdílné typy skládacích zařízení používané v procesu skládání vložek chladičů a je charakterizován původní návrh skládacího zařízení včetně jeho aktuálních problémů. Na základě rešeršní části této práce je definováno zadání nového skládacího zařízení a představeny dvě koncepční řešení s několika variantami řešení kritických konstrukčních uzlů. Ze dvou koncepčních řešení bylo vybráno jedno finální a jeho kritické konstrukční uzly byly prověřeny nutnými výpočty nebo případnou analýzou. Následně byly vyhotovena výkresová dokumentace nového skládacího zařízení. Nakonec je představen nový vylepšený návrh skládacího zařízení, který je poté zhodnocen.
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Platform for Measurement of Atmospheric Quantities
Hanák, Jiří ; Vlk, Jan (referee) ; Chudý, Peter (advisor)
This work is dealing with the design and implementation of an embedded system for aerology measuring. The aim of the system is to monitor atmospheric states during an ascent in the suspension under an meteorological balloon. First of all, attention is given to the Earth's atmosphere and its quantities, then an overview of existing systems for performing aerological measurements. The core of the work is focused on the choice of measurement techniques and the selection of suitable measuring elements for a given scenario. The aerological probe is using atmospheric sensors HIH-8131-021-001, MS5611-01BA03 and PT1000-550 for temperature sensing, while GNSS data is received using the MAX-M8Q-0 module and the measured data is stored on a microSD card and transmitted in parallel using the MTX2-434.650-10 radio module. The system is controlled by STM32L1 from STMicroelectronics programmed in C using HAL abstraction layer.
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DPF for CI Engines
Hanák, Jiří ; Řehák, Kamil (referee) ; Dundálek, Radim (advisor)
This bachelor thesis describes formation of harmful particles during combustion cycle of diesel engine and blocking its spreading into atmosphere using diesel particulate filters. First part of this thesis looks into types and mechanisms of formation of these particles including regulations of its maximal value in atmosphere thanks to emission regulations. Then this thesis summarizes principles of diesel particulate filters´ functioning, their types, methods of construction and regeneration. Also, there are described systems of diesel particulate filters with diesel engine and practical solutions. In conclusion, this thesis deals with problematic combinations of diesel particulate filters and diesel engines and outlines possible future development.
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Embedded System for Water Level Monitoring
Hanák, Jiří ; Kašpárek, Tomáš (referee) ; Šimek, Václav (advisor)
This work is dealing with the design and implementation of an embedded water level monitoring system. The purpose of the system is to control the filling of a tank based on the water level. First of all, the attention is given to the survey of existing measurement techniques and selection of the appropriate sensing elements for a given scenario. In fact, the embedded system is using TFmini and JSN-SR04T-2.0 contactless sensors. The system is controlled by STM32F0 microcontroller from STMicroelectronics programmed in C using HAL abstraction layer. The measured results are sent via Wi-Fi SoC ESP8266EX to the Python server that is used for processing and demonstratiton purposes.
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