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Weather measurement
Chovanec, Jan ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
The achievement of this thesis is to design functional equipment which is able to measure the basic meteorological variables as air temperature, humidity and barometric pressure. In order to measure relative humidity completed with temperature, an intelligent sensor manufactured by Intersema Inc., MS5534B, was chosen. Relative humidity is measured by a capacitance sensor Humirel HS1101LF. The measured data are stored in anon-volatile memory. Data can be downloaded to a computer file via serial port or they can be online displayed on the computer screen via the wireless Bluetooth connection. Because the equipment is supposed to be used for the external measurement without the connection to electricity, low power consumption was considered as a most important parameter as well as good weather protection.
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Moisture sensor
Čermák, Jan ; Klusáček, Stanislav (referee) ; Beneš, Petr (advisor)
This bachelor work consider with question of measurement of air humidity. Here are the basic theorem, wich have relation to air humidity, and detailed description of methods, wich are used in air humidity sensors. After come note about qestion of measurement humidity in soild substance. Next theme is calibration of sensors. In the last part is describle the structure of electrical network with unificated readout., wich is dependent on surrounding relative air humidity. Obiter work contain practical measurement of humidity in industry and qestions about it.
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CVD graphene sensor of relative humidity measured in ambient and high vacuum conditions
Urbiš, Jakub ; Mach, Jindřich (referee) ; Bartošík, Miroslav (advisor)
This bachelor thesis deals with the utilization of graphene as a gas sensor and the effect of gate voltage on sensor sensitivity change. The first part summarizes knowledge about graphene as a sensor of hydrogen, oxygen and water. The experimental part was devoted to measuring and comparing resistance variation in dependence on ambient humidity for pure graphene, graphene-modified by Ar+ ions and Ga-coated graphene. Another experiment dealt with the rate at which the resistance of graphene was stabilized after an application of gate voltage. The last part deals with the environmental chamber.
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Frekvence příjmu mléčné krmné směsi v průběhu dne a její vliv na růst u telat českého strakatého skotu
Vozihnojová, Dominika
In this diploma thesis analysis of frequency of milk compound intake during the day and its effect on growth in Czech fleckvieh cattle calves was performed in a large-capacity calf shed Kelčice, which belongs to the agricultural cooperative Určice. The monitoring, which lasted 12 months (from March 2022 to March 2023), included the frequency of daily milk compound intake. The calves were weighed on the day of arrival at the reception pavilion and again on the day of daparture to calf nursery at the end of the milk feeding period. During the monitoring, the temperature (°C) and relative humidity (%) in the calf house were measured using the HOBO sensor. Bulls showed greater weight gain (by 0.06 kg) compared to heifers at the same intake of milk replacer (P < 0.01). The greatest growth was recorded in calves that received an average of 7.1 and more liters of milk replacer (MR) per day (P < 0.01). The effect of the number of feeding days was also observed, when calves achieved greater average daily gain during a longer stay in the reception pavilion (P < 0.01). It was observed that temperatures above 20 °C had a negative effect on the calves, which was shown by the average daily gain, which was the smallest at the highest intake of MR. On the contrary, the temperature of 0-5 °C suited the calves the most when it showed the greatest growth.
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Vliv různého způsobu zpracování půdy na obsah vody v půdě
Mazel, Petr
The thesis deals with the effect of different tillage on the water content in the soil. The theoretical part is devoted to soil, soil properties, characteristics of soil tillage and the effects of soil tillage on soil properties. Monitoring of the effects of tillage on soil moisture was carried out in plot experiments at the Žabčice Field Experiment Station of the Mendel University in Brno. The experiment took place in 2022 and 3 tillage variants were monitored (traditional tillage, minimization tillage and no-tillage). For the assessment of soil moisture were determined: mass moisture, volume moisture, relative humidity and soil absorbency. Soil samples were taken on plots with winter wheat (Triticum aestivum L.) at three depths (0-10 cm, 10-20 cm, 20-30 cm). For mass moisture was statistically significant difference (p < 0.05) demonstrated between tillage variants, and the highest moisture was achieved with traditional tillage of 17.11%. For volume moisture were not found statistically significant differences (p < 0.05) between the tillage variants. For relative humidity were statistically significant differences (p < 0.05) achieved between treatment variants with the highest value in the no-till variant of 53.03%. A statistically significant difference (p < 0.05) was found for soil absorbency between traditional and minimization tillage, and the highest absorbency was achieved after traditional tillage of 38.75%.
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Vliv teploty vzduchu ve stáji na parametry mléčné užitkovosti dojnic českého strakatého skotu v konkrétním chovu
Hanáková, Šárka
The aim of this thesis is to analyse the effect of air temperature on milk yield parameters of dairy cattle in a specific breeding system. The milk yield parameters included milk yield (kg milk), lactation order (n), lactation phase (days) and milk components content (% fat and % protein). The observations were carried out between January and December 2022. Data on milk yield parameters were obtained from the results of the Performance Check (PC). A total of 7 863 individual cases (dairy cows) were evaluated. During the monitoring period, air tem-perature in the stable (°C), relative humidity (%) were collected using a temperature-humidity sensor (HOBO). The results showed that temperature had no statistically significant effect on milk yield, lactation stage and lactation sequence. On the other hand, there were significant differences in the content of milk components, which were fat and protein (P < 0.01). In the case of relative humidity, there was a statistically significant effect on milk yield, where milk yield decreased with increasing values of relative humidity in the cows studied (P < 0.01). Relative humidity also influenced fat and protein content (P < 0.01). In the case of THI, there were no statistically significant differences in milk yield, lactation order and lactation phase (P > 0.05), but statistically significant differences were found for milk components (P < 0.01).
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Monitoring the living environment in the house
Dlugoš, Daniel ; Ježek, Michal (referee) ; Staněk, Kamil (advisor)
This work, tries to create a small, rechargeable and portable device that senses temperature, humidity, barometric pressure, dust particles, carbon dioxide and VOC concentration. The air quality monitor can reliably measure the physical quantities encountered in every indoor environment, evaluate them and display them to the user. The sensors, data storage module and OLED display are housed on a custom-made PCB board.
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Logging station for humid environments
Pavlík, Jan ; Roubal, Zdeněk (referee) ; Szabó, Zoltán (advisor)
This thesis is about the design of a meteorological station deployed in a wet environment and its construction. The station will be used for measuring meteorological instrumentation in caves, because of that the station was designed to minimize its power consumption. Firmware was designed, to allow remote control of the station. A major part of the thesis is concerned with selection and description of the sensors and components used. Near the end of the thesis the control algorithm, communication interface and construction of the device is described.
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Weather station for smart home system
Mitter, Martin ; Burian, František (referee) ; Šedivá, Soňa (advisor)
This semesterly thesis deals with designing of weather station whose task is to provide via wireless data transfer on Wi-Fi network up-to-date information of measured temperature, barometric pressure, relative humidity, ambient light, wind speed and directions to smart home system, whose job is to store the values, creates its visualization for users and based on the data regulates the systems. The work describes the selection of suitable sensors for those variables and the design of the structure of the hardware part of the weather station. Theoretical parameters of the proposed solution are compared with the competition. Then the whole system is build and tested.
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Vliv větrolamů na mikroklimatické poměry okolní krajiny
Xaverová, Pavla
The work is focused on the results evaluating of four measurements of two windbreaks, in spring and autumn. The first one is located approximately 1 km south of Suchá Loz in the Zlín Region, where the measurements took place on 04/18/2007 and 10/20/2007. The second windbreak is located in the South Moravian Region, near the village of Micmanice. The data were measured on 04/04/2007 and 10/12/2006 in these areas. The climatic parameters of air temperature and relative humidity were evaluated. Type sensor HOBO RH Temp was located 2 m above the ground where was the measuring of instantaneous values carried out in five-second intervals. The results were evaluated for each measurement individually. Converting values to percentages, windbreaks can be compared with each other. The measurements showed the different efficiency of the windbreak for each measurement. To create the relevant evaluation is necessary in order to look at many other factors besides the measured values.
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