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Monitoring stress in the mast
Bednář, Tomáš ; Beneš, Petr (referee) ; Bejček, Ludvík (advisor)
The subject of this bachelor´s thesis is an issue of measurement and monitoring stressing in the mast – high voltage and very high voltage.The solution of query, including the producer and the users, is also presented. The aim of this thesis is to propose sensors for this measurement and making practical measurement of the concrete very high voltage mast.
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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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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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Ultrasonic measurement system
Ondraczka, Lukáš ; Solčanský, Marek (referee) ; Vaněk, Jiří (advisor)
The work deals with development and assembly of ultrasonic airflow measurement module for measurement of air flowing around photovoltaic panel. This system allows quantification of photovoltaic panel air cooling. The work contains development of sine wave generator, bridge amplifier and receiver with passive band pass filter, amplifier and comparator. It also deals with digital part realization. This digital part is formed by Renesas 78K0R microcontroller on demo board. The last part of this work contains testing of the whole system in aerodynamic tunnel and on photovoltaic panel installation.
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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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Ultrasonic Anemometer
Křepelka, Pavel ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
In the first section of this document, there are described principles of the wind measuring. Anemometers can be divides by physical principles to mechanical (propeller or cup), ultrasonic anemometers and thermoanemometers. This paper is focused to ultrasonic anemometers. In the next part, there are described principles of sound propagation in the atmosphere. There are studies of measurement theory and comparing of different approaches. Completed solutions are presented in patent exploration. Afterwards, there are introduction of market research. Important parameters of ultrasonic anemometers are highlighted. Main aim of work is designing prototype of ultrasonic anemometer. Software, hardware and construct of experimental anemometer were designed. Created anemometer was calibrated in aerodynamics tunnel and results were compared with simulation output.
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Testing of airflow sensor
Chovanec, Radim ; Vojáček, Zdeněk (referee) ; Vdoleček, František (advisor)
This work is aimed at measuring air velocity, especially in closed channels. Closed channel flow sensor testing is performed in cooperation with Sensit Rožnov. A test work station has been designed and created on which the selected characteristics of the sensor were practically verified. The work describes the measurement procedure and its subsequent evaluation.
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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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