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Measurement of meteorological variables
Škorpík, Daniel ; Harabiš, Vratislav (referee) ; Chmelař, Milan (advisor)
This bachelor thesis discusses about the basic meteorological variables, especially temperature and airflow. These magnitudes are measured using an anemometer which uses resistive sensors, namely, two thermistors of NTC type that described technology, operations, methods of scanning, sensor placement and implementation of such a device. After that was designed block diagram and circuit diagram. The meter is realized, than we describe the individual components and then is calibrated and tested. In conclusion, it is evaluated for use in medicine.
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System of controlled generators of rectangular pulses
Holeksa, David ; Mišurec, Jiří (referee) ; Hanák, Pavel (advisor)
This bachelor thesis deals with the design system of controlled generators of rectangular pulses, which are burdened with toroidal coils. The objective is realization of the equipment to be controlled by a microcontroller, which will bring rectangular pulses to each coil according to pre-specified parameters. The resultant generator is capable of generating current pulses having an amplitude of 0.1 to 1 A and a pulse time of 1-10 ms.
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Energetic problems of induction electroheat equipments
Milka, Jiří ; Paar, Martin (referee) ; Lázničková, Ilona (advisor)
Induction heating is mostly used for melting metal materials in metallurgy. The principle of induction heating comes from electromagnetic induction which generates eddy currents heating the charge in electrically conducting material. The first part of the bachelor thesis is devoted to the principle of induction heating. Further, there are possibilities of applying the induction heating in electro heat devices mentioned. As the paper is focused on energy problems appearing when getting connected to the grid, the second part of the paper contains explanation – both theoretical and on examples - of compensation and symmetrization of induction electro heat devices.
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Inductive position sensor
Volf, Lukáš ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
In the beginning is given an overview of sensors and their separation and properties. This work also deals deeper with inductive sensors. The work is designed for evaluation of the oscillator circuit (binary inductive sensor), its practical implementation, measuring the sensing range of different metals and measurement evaluation. For those interested, here is a list of literature.
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DC/DC step-up converter for notebook
Škunda, Michal ; Klíma, Bohumil (referee) ; Červinka, Dalibor (advisor)
Given bachelor’s thesis devoted to a proposal and implementation of transducer STEP-UP for supplying of notebook in car. Introduction presents dividing of switching power supplies followed by a choice and a proposal of power supply. In this work we can find the specific proposal of inductor, the proposal of electronic connexion and the proposal of PCB layout. There is a software EAGLE used for the design of PCB layout. In the last part of work there are particular courses of current and voltage that characterize power supply pictured. The work contains measured load characteristic of switching power supply loaded by notebook as well. Notebooks need to have quality power supplies that is why there was a special attention paid to the quality of supply and its electric parameters.
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The inverter for arc-welding
Vaculík, Josef ; Klíma, Bohumil (referee) ; Červinka, Dalibor (advisor)
This diplom thesis theoretically deals about principle of pulse welding current source. Work explains operation principle of the single acting transmit converter used in realized construction and mention the others examples of converters types. Goal of the work is design individual parts of source : input filter, pulse transformer, output inductor and power semiconductors components. Thesis also contains description of the regulation circuitry of the converter, auxiliary power supply and pre-driver for power transistors. If everything will be all right prototype of the source will be assembled and measured. Results will be compared with theoretical assumptions.
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Description Methods for Electrical Systems and Their Solving
Křižka, Jakub ; Němec, Zdeněk (referee) ; Šeda, Miloš (advisor)
The objective of bachelor thesis is a searching description of methods, which are usually used for calculation of circuit variable values in electric circuits. At the beginning is thesis concerning with description of individual components (power supplies, electronic components) used in electric circuits, then also with analysis of rules, which are the fundamental for a calculation of values in electronic circuit – Ohm’s rule and Kirchhoff’s rules. Indivisible part of thesis is also summary of special methods, such as method of loop currents (mesh analysis), method of nodal voltage (nodal analysis) etc. and their demonstration on examples of electric circuits. The structure of thesis is coursebook and gives successive summary of information in area calculations of electric circuits.
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