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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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Ultrasonic anemometer
Dvořáček, Michael ; Kováč, Michal (referee) ; Kubíček, Michal (advisor)
Work describe principles and problems of the realization ultrasonic anemometer. It's described methods of computation speed wind and its correction. In favor of realization are used ultrasonic transducers and microcontroller ARM Cortex-M3. The work treats PWM signal generating, its analog filtration, amplification and transmitting. On receiving part there are low voltage amplifier and comparator. Developing code is described by flowcharts.
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Wind Influence on the Traffic Airports in the Czech Republic
Švec, Michal ; Hammer, Jaromír (referee) ; Krška, Karel (advisor)
This bachelor’s thesis deals with surface wind, which is the wind that influences or limits take-offs and landings of aircrafts. It firstly mentions the meteorological causes of the wind, its characteristics in the atmosphere, effect of the ground relief to the wind and dangerous meteorological phenomena for aviation, which are caused by the wind. The next part is focused on the wind measurement from the general and practical point of view, which includes today’s measuring instruments. It describes the issue of wind components and their effect on take-offs and landings of airplanes, wind in meteorological reports and forecasts and AWOS system. Afterwards the evaluation of surface wind at Karlovy Vary airport was made using the described scales and methods.
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Ultrasonic anemometer
Hůlka, Jakub ; Mágr, Zdeněk (referee) ; Havlíková, Marie (advisor)
This master’s thesis deals with the construction and realization of an ultrasound anemo- meter. Individual types of anemometers are compared in this thesis, including mechanical, thermo anemometer and ultrasound anemometer. Different construction renderings and measurement principles of ultrasonic anemometers are analyzed. In addition, an experi- mental method of measuring the speed of sound by phase shift between two transmitting frequency is described in the document. This thesis includes the design of an control unit and the realization of a simple prototype of an ultrasonic anemometer. Experimental confirmation of the characteristics of the ultrasound anemometer is the last part of the document.
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Apparatus for wind speed measurement
Kašpárek, Martin ; Čech, Petr (referee) ; Chmelař, Milan (advisor)
This work treats of wind force measuring principles . It discusses possibilities how it is able to measure wind force and what are the advanteges and disadvantages of each of principles. In terms of one of principles is designed cell battery powered mobile wind force measurer with numerical display.
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Thermal Mass Flowmeter
Mlčoch, Albert ; Kunz, Jan (referee) ; Beneš, Petr (advisor)
The thesis deals with the design of a mathematical model and practical implementation of a flowmeter based on the thermal principle. The range of the proposed flowmeter is from units of kilograms per hour to lower hundreds of kilograms per hour. The design of the flowmeter is non-invasive to the flow channel, the heating element is located outside the pipe. In this paper, the flowmeter parameters are identified and a temperature regulator is proposed. Measurements are made on a test bench. The results of the measurements are discussed. Modifications to the existing hardware are suggested.
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Speed Measurement of Yacht
Černý, Ondřej ; Bradáč, Zdeněk (referee) ; Šedivá, Soňa (advisor)
Work deals with the measurement speed of yacht and wind speed. For measuring is used GPS module and cup anemometer. In the thesis is detailed analysis of the process and construction of eletrical equipment that processes incoming data of speeds and displayed on the screen. Thesis further processes the measurement results and compares the theoretical assumptions and practice
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Bladeless fan cooling module
Šišpera, Adam ; Vacula, Jiří (referee) ; Bazala, Jiří (advisor)
Tato diplomová práce se zaměřuje na prozkoumání možností implementace bezlopatkového modulu ventilátoru založeného na Coanda efektu v chladícím systému osobního vozidla. Jejím cílem je prozkoumat proveditelnost takového řešení, jeho provozní charakteristiky a stanovit soubor doporučení pro návrh konkrétního designu. Vhodný chladící modul je navržen, následně hlouběji testován a jeho funkčnost je ověřena také reálným experimentem.
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Meteorological station system
Čada, Jan ; Balík, Miroslav (referee) ; Lattenberg, Ivo (advisor)
This bachelor thesis deals with the design and implementation of a online meteorological station system, which consists of individual weather stations that communicate via the Internet with the server. The first part of the thesis discusses the principles of measuring major meteorological variables and deals with the selection of suitable sensors for measuring temperature, atmospheric pressure, humidity, wind speed and rainfall. In the practical part, one of the weather stations based on Raspberry Pi Zero microcomputer is designed and realized. As a complement to the measured data, the station includes a camera that captures the view from the site where the meteostation is installed. 3D printing is used to realize most of the mechanical parts, it has the advantage of speed, accuracy and easy reproducibility. For the measurement of temperature, pressure and humidity, a combined sensor BME280 from Bosch is used, which is placed in a small Stevenson screen. The wind speed is measured by a cup anemometer whose rotation is sensed by an integrated Hall sensor. The output pulses are then counted using the PCF8583 circuit, which has an I2C interface for reading the values with a Raspberry Pi microcomputer. Special attention is paid to the construction of a custom calibratable tipping bucket rain gauge with a resolution of 0,5 mm, whose mechanical motion is also sensed by a Hall sensor as in the anemometer. The reading of the data from sensors and sending it to the server is handled by a Python script. For storing and presenting data to users, a custom server solution based on LAMP webserver is implemented, its source codes are written in PHP, HTML, JavaScript and CSS. In addition to the web interface, which displays the data in graphs, the measured data can be also presented to the user via an application for mobile devices based on Android. The application was developed in C# using the Xamarin framework in the Microsoft Visual Studio development environment. Among other things, it implements a widget for quick access to the measured values directly from the home screen. In the final part of the thesis, interesting findings obtained by observing the measured values are mentioned.
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