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PI Metal Detector Using DSP Processing
Betlach, Radomír ; Čmiel, Vratislav (referee) ; Šebesta, Jiří (advisor)
The subject of Bachelor‘s thesis is design of pulse-induction metal detector. The detector is designed to operate with already-known principle of detection, yet at an innovative concept. In design will be used new technologies and procedures. In the thesis is described design of the general conception and components of the detector. The arguments for utilization separate procedures are discussed, as well as their advantages, eventually general impact of parameters of wiring against final properties of the detector. In design of wiring solution should be considered the following signal processing by DSP. Another subject of this thesis is to apply mentioned theory in practise and create a working sample of metal detector.
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Sensorless velocity control and positions of d.c. low-power brush motor
Svoboda, Jan ; Hanák, Pavel (referee) ; Prajzner, Václav (advisor)
This bachelor's thesis focuses on sensorless control of low load brushed DC motor that is used in the actuators made by the Honeywell company. The first part provides an introduction into motor control and common used methods of speed and position sensing of brushed DC motor. Sensorless method of sensing described in this work is the detection of commutation pulses from the signal of motor current. These pulses are caused by brushes leaping over the commutator bars. Correct evaluation of commutation pulses can provide the information about velocity and position of the motor. This relatively new method of detection of commutation pulses is investigated and arising problems are demonstrated on measured samples of signal. Suitable methods of signal processing are then proposed. Infallibility of these signal processing methods is then proved on the set of signals measured under circumstances of supply voltage and abrasion. Then it is decided which signal processing method that sensorless control system can use is the best.
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GUI for Automotive Tester
Bilík, Šimon ; Čala, Martin (referee) ; Beneš, Petr (advisor)
This thesis is aiming in problematic of shock absorber testing, namely by resonance adhesive test methodology EUSAMA. The goal of the thesis was to make a program for measuring and processing signals from shock absorber tester with a graphical user interface to operate of this program. The program was written in the LabVIEW programing language and for data acquisition was used acquisition hardware of the company National Instruments.
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Control unit for turbofan jet engine TFE731
Slavotínek, Jan ; Mikuláštík, Jiří (referee) ; Macho, Tomáš (advisor)
This thesis is classified as an internal experimental project whose aim is to design HW and low level SW of simplified version of the controller for TFE731 turbofan engine according to defined requirements. The expected outputs in addition to the system design is also information about possible technical problems and difficulties arising during the analysis and development of the system. The work covers a brief look into the history of aviation and avionics, theoretical analysis turbofan engine, analysis of measured and controlled variables. Based on the requirements analysis and I/O values is made circuit design (HW) and design of the low level control software.
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EEG Signal Processing and Analysis
Uhliarik, Michal ; Drahanský, Martin (referee) ; Kupková, Karolína (advisor)
Tato práce se zabývá oblastí elektroencefalografie, zpracováním EEG signálů a jejich analýzou. Jsou vysvětleny základní principy vzniku biologických signálů v mozku, charakteristické mozkové vlny a jejich klasifikace. Dále práce ilustruje základní metodologie měření a záznamu těchto signálů, chyby měření, vliv a zdroje signálových artefaktů. Následně je rozebrána problematika předzpracování signálu, nejrozšířenější metodologie, jejich primární určení a teoretické podklady. Zároveň je obsažen i přehled metod pro analýzu EEG signálu v časové, frekvenční a časově-frekvenční oblasti. Jádrem práce jsou metody analýzy EEG signálu ve frekvenční oblasti, jsou uvedeny jejich teoretické podklady, omezení, odchylky a zaměření, jako i vhodné matematické aparáty pro kompenzaci uvedených nedostatků. Praktická část popisuje architekturu a implementaci aplikace Easy EEG Player, která vznikla jako součást téhle práce. Jsou popsány metody reprezentace, zpracováni a analýzy EEG dat za použití zvolených metodologií.
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Object Classification Using Radar
Přívara, Jan ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
The aim of this bachelor's thesis is to design and implement classification system using radar, specifically vehicle classification system. The first part describes both radar principles and radar signal processing methods. A brief introduction to machine learning is provided, with emphasis on Support Vector Machines classification model. Feature extraction methods from radar signal are discussed as well. The next part describes concept and implementation of system for vehicle classification. In the end, the implemented classification system is evaluated and the possible continuation of this work is stated.
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Spectral Analysis of EEG Signal
Miklenda, Petr ; Orság, Filip (referee) ; Kupková, Karolína (advisor)
This bachelor thesis is focused at the EEG signal analysis using the Fast Fourier Transform. The theoretical part consist of EEG signal description, its creation and selected method for signal analysis. The practical part presents program for recording data from EEG headset and displaying the Fourier spectrum.
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Musical multi effects analysis
Masár, Igor ; Kubásek, Radek (referee) ; Friedl, Martin (advisor)
This work deals with guitar effect and guitar sound in general. Most widely used effects are described as well as their output time courses are simulated. There is a comparison of analog and digital effects. There is also explained the principal of guitar multiefects, described all parts of guitar efect chain and determined key parameters, which has the main impact on quality of final sound. It is used to describe a methodology for measuring multi-effects and the results obtained by this measurement. The last part deals with psychoacoustic measurements.
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Recognition and Search in SKype Calls
Tomášek, Pavel ; Plchot, Oldřich (referee) ; Černocký, Jan (advisor)
The project aims at a system for recognition of Skype calls. One of the necessary project focuses is finding out a high-quality Skype recorder. Signal preprocessing (segmentation of speech/silence) and speech recognition follows. Another project interest is in choosing a presentation software, which meets the project needs. Essential part of this work is also indexing and search implementation. This project is a proof-of-concept and shows one of the ways of speech recognition utilization.
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Digital Filter Design on GPU
Vaverka, Filip ; Maršík, Lukáš (referee) ; Polok, Lukáš (advisor)
This thesis shows one of the approaches to the design of ditigal filters with infinite impulse response and specified order. The proposed solution is based on an evolutionary genetic algorithm and therefore allows for direct filter design from its specification. Its main contribution to this subject is that the implementation is parallel and it is acceleraded by GPU. The filters are designed in cascade representation. It also allows to specify both, the desired frequency and phase characteristics of filters.
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