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Electronical system for greenhouse control
Šedivý, Jozef ; Štohl, Radek (referee) ; Bradáč, Zdeněk (advisor)
The aim of this bachelor thesis is to develop an electronical system for greenhouse control, controlled by microcontroller. This device has been divided into 2 parts, which communicate between each other via RS422 interface. The system contains temperature, humidity and illumination sensor. Based on data from sensors, it controls climate conditions in a greenhouse.
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Teplotní stárnutí a životnost pájených spojů solárních článků
Jakubka, L. ; Linhart, Jan ; Szendiuch, I.
This work is about interconnection of the solar cell and the substrate. Ceramic substrate and back side contact solar cells were used. There are 36 solar cells which were contacted on 12 substrates. The Ag paste was used as a conductive layer and lead free solder paste was chosen as a solder. 3 firing profiles in 4-zone furnace were tested. The thermal cycling is the next step. 6 substrates will be tested with 1000 cycles and 6 substrates will be tested with 3000 cycles. The cycle is in the range -40°C to 125°C, ramp 10°C/min, dwell 10 min, period 60 min. This is the common test cycle regime used in military applications testing, hence the wide temperature range of the cycle.
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Measurement of temperature on swimming pool water
Moravec, Luboš ; Pavlík, Michal (referee) ; Šteffan, Pavel (advisor)
This bachelor’s thesis deals with measuring the temperature of the pool water, control of heating and transmit the data remotely to a computer or mobile device. Includes description of the measuring device, the function and design of possible implementation. It also explores the issue of measuring sensors, communication with the microcontroller and control of remote communication. Thesis also concern the selection of components, design diagrams, PCB design and structural design of the device. This thesis also includes software that deals with data processing and communications at distance.
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Measurement uncertainties determined by the Monte Carlo method
Krejčí, Roman ; Havlíková, Marie (referee) ; Šedivá, Soňa (advisor)
This bachelor thesis deals with the determination of the uncertainties of direct and indirect measurements. It focused on the uncertainty calculation by Monte Carlo method and GUM uncertainty framework. The practical part deals with the determination of uncertainties indirect measurement of resistance Ohm’s method. The calculated uncertainties are compared on the basis of the influence of the method, accuracy used devices and the temperature.
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Wireless sensoric network for hop drying facility
Čapek, Lukáš ; Čech, Jakub (referee) ; Šnajdr, Václav (advisor)
The purpose of this project is to build a wireless sensor network for measuring temperature and relative humidity in hop drying facility. This is a monitoring device, consists of several sensor units and one control and display unit. Display unit coordinates a whole network and can display data on LCD or download collected data to PC. Sensor unit measures a relative humidity, temperature, battery voltage and transmits data to display unit. Units contain a transceiver which operates in ISM band 868 MHz. Circuits are driven by 8-bits microcontroller Freescale.
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The use of the reactor with sludge cloud and external biomass separator for methane production from the substrate for Biogast Plant
ŽIVNÝ, Jakub
The aim of the study was to compere the reactor with sludge cloud and external separator biomass in different modes. This typ of reactor is principally used in wastewater treatment and in this work was designed for production of biogas from biosmass, commonly used in agricultural biogas plants. The reactor assembly was prepared in the laboratory of the available glass flasks, connected by rubber tubing and mixing pump. The entire device was immersed in a water bath heated thermostat. For the purpose of this work was used samples from biogas Týnec near Dobrovice at Mladoboleslavko. The reaktor was injectable liquid portion, formed after adjusment method IFBB (Integrated Generation of Solid Fuel and Biogas from Biomass). The principle of this method consists in separating the liquid and solid components of biomass. Operation of the reactor was carried out in three stirring models: without stirring, medium stirring, intensive stirring. Further, the operation was compared at 40°C and 53 °C in a mode without stirring. This monitoring is carried abut for five hours. The specimens was taken every hour and after drying to COD (determine chemical oxygen demand), which expresses the degree of degradation of organic matter. The results show that the laboratory devie model stirring does not show. However, the temperature change from 40°C to 53°C showed an increased degradation of organic matter.
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Building control system
Nekula, Vít ; Valach, Soběslav (referee) ; Bradáč, Zdeněk (advisor)
The thesis is about designing a house control system which works as decentralized device. Initially, a brief market research in field of intelligent electro installation was made. On the basis of gained knowledge the whole concept of the system was designed – a control unit, a weather station and a temperature control unit. Each part communicates with each other wirelessly. A complete electronic design of circuit boards is a part of the thesis. The board were afterwards produced and assembled. Then a communication protocol and a complete implementation of all system functions were made. Next part of the thesis is a design and a programming of a web interface which is used to control the entire system. The final part of the thesis is about measuring a quality of communication between single units.
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Neuroeconomics: The analysis of consumer behavior and perception of TV spots
Červenka, Petr ; Chytilová, Helena (advisor) ; Máslo, Lukáš (referee)
The thesis deals with the detailed study of two television commercials of an unnamed energy company. The aim of this work is to determine whether people's subjective evaluation is similar or different to values that were detected during the measurement, after viewing each commercial and in subsequent in-depth interviews. A sample of 24 respondents, who participated in the research, represented the composition of the economically active population in the Czech Republic. These were people of various ages, a combination of educational attainment and an evenly balanced gender ratio. Neurological measurement was done through an eye camera, brain responses were measured using electroencephalography (EEG), and changes in heart rate, skin resistance and body temperature were measured by photoplethysmography. The resulting data ispresented in graphs indicating emotional polarity and activity. The results show that respondent's verbal evaluation of their perception of ads is not necessarily identical with the values that are measured by the devices. The thesis concludes by recommending how to successfully target the so-called end user who uses the services of the company.
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SmartFlat peripherials
Chytil, Jiří ; Jirgl, Miroslav (referee) ; Bradáč, Zdeněk (advisor)
The theme of this thesis is the design of peripheral devices of a smart home SmartFlat and the design of communication interface for this system. Designed units are the humidity and temperature measuring unit, the unit of security and the smart socket unit for remote control, power measurement and power control. All units are designed for wired communicaton and also for wireless communication with control unit.
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