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Planar Structures for High Frequency Band
Pulec, Jiří ; Pietriková, Alena (referee) ; Maschke, Jan (referee) ; Szendiuch, Ivan (advisor)
The present paper deals with the problematics of the design and technology of planar microelectronic structures for the hign frequency band. These structures were realised on the Department of Microelectronics and their properties were measured on the Department of Radioelectronics. The part of this work is also simulation of some microelectronic structures, where for these simulations the design and simulation tool Ansoft Designer and the FEM tool ANSYS was used. The attention is paid to the discrete devices (coils and capacitors) as well as to the more complex structures (frequency filters). The paper yields the new findings in the field of the design and technology of the discrete components as well as of the more complex systems, these findings can be used as the basis for another research of practical applications.
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Current transducer's characteristics
Čížek, Ondřej ; Bulín, Tomáš (referee) ; Huzlík, Rostislav (advisor)
In this bachelor thesis are described all used current transducers, the way of their function and at each of them are described their properties. After that is described program LabVIEW and measurement, which happened by using it with specialization on frequency characteristics and their evaluation.
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Probe for RFID cards tests at 13.56 MHz
Zigo, Viktor ; Vychodil, Josef (referee) ; Derbek, Vojtěch (advisor)
This thesis deals with RFID technology and the tag design for RFID device testing on the frequency of 13, 56 MHz. Everything regarding testing of such devices is described in ISO 18047-3 Standard. The target of this thesis is to design and construct the impedance matching (probe) between a proof coil and SW radio USRP N200 and the principles of this probe design are explained.
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Insulation system of synchronous and induction motors for 18kV
Šporcr, Viktor ; Vetiška, Vojtěch (referee) ; Ondrůšek, Čestmír (advisor)
Bachelor’s thesis is divided into two separate sections. First part is concentrated on insulation system of high voltage machines impregnated by vacuum pressure impregnation. This part of semester thesis concisely describes the composition of individual components used for construction insulation systems of air and water cooled rotation machines. Second practical part contains evaluation of dielectric resistance of coil set with insulation system designed for voltage level 18 kV. This part contains a short description of used insulations. Further includes a report of dielectric tests of used coil set. This set of coils was tested on following tests. Heating measurement semi conductive tape with infrared camera at impulse voltage. The coils was exposed to impulse voltage for one 100 hours and sinus voltage for one 1000 hours. Before and between, aging was measured value of charge partial discharges and dissipation factor.
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Metal detector for industrial use
Stehno, Rostislav ; Friedl, Martin (referee) ; Szabó, Zoltán (advisor)
The goal of this project is explore and study the ways of metal detecting and create a metal detector for industrial use. During a project development, the device size and user easy interface were the basic requirement. As a visual device was chosen LCD touch display, which is very important as a user-friendly interface. For math calculations and right function of device will be implemented microcontroller from Atmel corporation. As a data storage will be used a flash memory with 16MB of size. When the device were inventing, a lot of methods were studied and the impulse detect method were chosen which is the most perspective way of metal detecting. Device will communicate with PC trough a USB port. The device will have a battery which allows device to run for a few hours. The prototype of PCB were developed. Few mistakes has been discovered, while the device were constructed, but they were solved successfully.
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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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Velocity pickup
Konečný, Jan ; Pikula, Stanislav (referee) ; Beneš, Petr (advisor)
This bachelor thesis deals with a proposal of a sensor for measuring relative oscillation of two interacting surfaces. The thesis describes two possible solutions with their advantages and disadvantages, and a patent research. The main part of this bachelor thesis concentrates on inductive position sensor – its attributes and practical proposal.
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Analytic represantation of AC winding properties
Kubín, Tomáš ; Skalka, Miroslav (referee) ; Ondrůšek, Čestmír (advisor)
My bachelor thesis deals with the issue of overview diagram of magnetic fields of basic free-phase winding. It is divided into four parts.The first part focuses on basic winding types and types of their connection. The second part describes the issue of analytic calculation of the magnetic field intensity in the air gap of rotating machines. This description is easier and faster than modern method of final elements in some cases because it displays course of particular harmonics and their partial sums for selected magnetic fields. The third part presents Görges diagrams of basic winding types and finally there is a calculation of the winding factor shown on two examples in the fourth part.
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Metal detector for industrial use
Stehno, Rostislav ; Hrabina, Jan (referee) ; Szabó, Zoltán (advisor)
The goal of this project is explore and study the ways of metal detecting and create a metal detector for industrial use. When the device were inventing, a lot of methods were studied and the impulse detect method were chosen as the most perspective way of metal detecting, thanks to a huge electronics parts possibilities. After experiences with preceding device was necessary to redesign it. Main target of this thesis is to increase the computing power of detector. For this purpose will device need a new microcontroller. Device will communicate with PC trough a USB port. The device will have a battery which allows device to run for a few hours. Processing of measured data will be make even with DFT which will lead to better analyze of mass and type of conductor under device.
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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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