|
| |
|
|
Monitoring system for model airplane
Belloň, Michal ; Dřínovský, Jiří (referee) ; Růžek, Václav (advisor)
This projekt is focused on wireless transfer of informations from air model to modeller during the flight. These informations will be displayed on LCD placed near controller of model. Project includes theoretical design of device, choosing suitable components, circuit diagram, PCB and photos of realized device.
|
|
| |
|
|
Design and implementation of TEM cell
Bednarský, Vojtěch ; Růžek, Václav (referee) ; Dřínovský, Jiří (advisor)
The purpose is to design and make a TEM cell, which may often be referred to in publications as a Crawford chamber, after the inventor. The operating frequency is specified from 100 kHz to 400 MHz and is suitable for a test device of maximum size (0,3(l) x 0,3(w) x 0,1(h)) meters. I will first describe the basic methods of electromagnetic susceptibility testing, and electromagnetic interference measurements, and then mention the issues and motivations for the fabrication of the closed TEM cell. Computer simulations were performed in the numerical computing software CST Microwave Studio. The calculated dimensions were used as a starting point for simulation. Dimensions from the simulation were used for the fabrication of the closed TEM cell, which showed similar results as the results of the simulations.
|
|
|
Pre-compliance Electromagnetic Immunity Tests
Růžek, Václav ; Polívka, Milan (referee) ; Soldán, Josef (referee) ; Dřínovský, Jiří (advisor)
The doctoral thesis deals with aspects of pre-certification tests of electromagnetic immunity in the automotive industry. The thesis analyses commonly used test methodology and mentions that standardized electromagnetic immunity tests performed by certified testing centres, which are extremely expensive and represents a considerable time load in the development of the vehicle. The thesis therefore proposes innovative ways for replacement of certification tests with an acceptable level of uncertainty. Key methods are seen in numerical simulations and modified test procedures when the vehicle is exposed by electromagnetic field. The proposed methods are deeply explored and their benefits are discussed and support by number of experiments. The results obtained with the pre-certification methods are objectively compared with the results of the certification measurements by FSV method. The work brings a proposal for a comprehensive test methodology including a discussion of risks and uncertainties with related issues.
|
|
| |
|
|
Module for verification of rotational position sensors
Krolák, David ; Růžek, Václav (referee) ; Dřínovský, Jiří (advisor)
This master‘s thesis deals with design and realisation of a control module for automated measurements of the modern contactless inductive position sensors by a mechanical rotational system consisting of a DC motor and an incremental quadrature encoder. The thesis presents methods of driving DC motor and recording of measured data by a microcontroller. The thesis presents a communication protocol between the control module and personal computer via USB interface. A part of this thesis is also to develop a control software and firmware, including the measurement and evaluation of properties of the control module.
|
|
|
Monitoring system for model airplane
Belloň, Michal ; Dřínovský, Jiří (referee) ; Růžek, Václav (advisor)
This projekt is focused on wireless transfer of informations from air model to modeller during the flight. These informations will be displayed on LCD placed near controller of model. Project includes theoretical design of device, choosing suitable components, circuit diagram, PCB and photos of realized device.
|
|
| |
|
|
Measurements of electromagnetic interference in anechoic and semi-anechoic chambers
Deneš, Roman ; Růžek, Václav (referee) ; Dřínovský, Jiří (advisor)
This thesis is focused on a detailed analysis of the mechanisms of electromagnetic wave propagation in anechoic chambers. The analysis takes into account the influence of the measurement distance, setup of anechoic chamber and other parameters. Furthermore, the work deals with a validation of both types of anechoic chambers and examines the impact of selected parameters on the measurement results. Based on the theoretical analysis and practical measurement, the comparation between semi and fully anechoic chamber, or a three and ten meter measuring distance was made. This thesis also contains a detailed analysis of sources of the uncertainty.
|
guest ::
RSS feed.