|
|
Radar Active Cruise Control
Rous, Petr ; Široký, Adam (referee) ; Maršík, Lukáš (advisor)
This bachelor thesis is dedicated to radar active cruise control. The aim of the work is to implement program logic of the adaptive cruise control system. It describes basic techniques of radar signal processing as well as various difficulties during this process. It is also concerned with methods used for radar objects detection. Withing the work, two different radar modules are compared for their suitability to use as sensors of active cruise control. Finally, implemented system is tested using data collected in real road transport.
|
|
|
Range Measurement Using Radar
Urbánek, Radomír ; Musil, Martin (referee) ; Maršík, Lukáš (advisor)
The aim of this bachelor's thesis is to design and implement method using radar to distance measurement. The first part describes radar principles. A brief introduction radar signal processing methods and radar techniques for distance measurement as well. The next part describes concept and implementation of system for estimate distance. In the end, the implemented method is evaluated and possible continuation is stated.
|
|
|
Radar Altimeter for Ultralight Aircraft
Absolon, Marek ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
The main topic of this paper is a radar ranging for use in an aircraft altitude measurement. This should help beginner pilots in practicing landing and take off. To achieve this aim, we chose to use continuous-wave radars with frequency modulation (FMCW). Our solution is based on linear frequency modulation method using triangular modulation pattern. During the testing, it was found out, that radars with 24 GHz bandwidth have a range resolution from 1 meter (depending on modulation depth) to 13 metres. This range is sufficient for usage in training of takeoffs and landings, which is the real purpose of this paper. Another good finding is, that during takeoff and landing, there is minimal occurrence of doppler frequencies. Final algorithm works on principle of two currently processed spectrums, which are substracted. Afterwards, found peaks are validated on current spectrum.
|
|
|
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.
|
|
|
Radar Detection of Vital Signs
Köteleš, Dávid ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
Nowadays, it is very important to measure the vital signs of a person. Thanks to the data that we get from measure, we can control health of the person. It is usefull as well in sports, where we can control performance of sportsman. Different technologies are used for measurement. We can divide these technologies in contact and contactless methods. Contact methods have their disadvantage and that one is when patient can not feel comfortable and then the results may not be correct. Thats why we are currently using contactless methods that we try to develop to achiev highest possible accuracy. In this work are signal processing strategies using fast fourier transform and different filtration techniques for monitoring vital signs described using radar device and eventually their variatons. These strategies are then tested on real data and compared to achiev best result. The IWR1642Boost and Texas Instruments demo software is used for practical exploration.
|
|
|
Narrowband PLC modem
Novák, Pavel ; Koton, Jaroslav (referee) ; Mlýnek, Petr (advisor)
The theses is focused on the use of PLC technology. The aim of the thesis is creating device which communicates in a narrowband transmission frequency band. Transmission of communication between plc elements runs through the low voltage distribution network. The frequency and phase modulations are used in order to change the character of data signal. Transmitter and receiver parameters are subjects to the CENELEC standard. The theses gives more attention to the area of hardware build communication element rather than the area of programming.
|
|
|
Breathing Rate Estimation from the Photoplethysmogram
Petrík, Jakub ; Králík, Martin (referee) ; Kozumplík, Jiří (advisor)
The main topic of this bachelor thesis are methods for breathing rate estimations from photopletysmographic signals. In the theoretical part of the thesis we find a biref review of methods that are used for breathing rate estimation. These methods are than tested and their performance is evaluated on two pubilc databases BIDMC and CapnoBase. These databases also contain reference values of respiratory rate.
|
|
|
Experimental musical instrument, combining a sampler based on the tape principle and the principle of frequency modulation
Hofr, Šimon ; Indrák, Michal (referee) ; Dlouhý, Dan (advisor)
The aim of the bachelor thesis is to design and implement an experimental mechanical-electric musical instrument specified as a sampler on the magnetophonic principle, whose sound is frequency modulated. In the theoretical introduction I will describe the basic classification of musical instruments and present examples from selected groups that are close to the proposed sampler. The second chapter is devoted to types of synthesis, of which frequency modulation is the central one. The third chapter describes the design of the sampler form and its circuitry. The fourth chapter discusses the realisation and construction findings.
|
|
|
Respiration rate estimation using PPG signal
Machalová, Marie ; Kozumplík, Jiří (referee) ; Králík, Martin (advisor)
The thesis deals with the estimation of breathing rate from the PPG signal. The first part is theoretical, it deals with the anatomy and physiology of the circulatory and respiratory systems. It also focuses on methods of monitoring these systems. Describes the PPG signal, its acquisition methods and methods for estimating the breathing rate. In next section, there is an introduction to the MESA database, which provides the measured PPG signals. The practical part describes the application of the used methods, their results and validation of the BIDMC database.The method with the smallest average deviation is the drift-based extraction method, with a deviation of 0.57 breaths per minute.
|
|
|
Design of low-frequency phase locked loop for sensing applications in low-voltage TSMC 0.18 um process
Svoboda, Marek ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
The work deals with the design of FM modulation chains and their sub-circuits, which construction is based on analog multipliers produced in the TSCM process 0.18 m 1.8 V. One chain operate with a rectangular carrier and the other one with a harmonic carrier wave. The basic carrier frequency is 100 kHz, and the basic test modulation signal is 1 kHz harmonic waveform. Demodulators are built on the principle of the phase-locked loop, and the aim of the work is to verify the functionality of such a loop and to determine its limiting properties. The work also contains graphical outputs from the Cadence Virtuoso development package, in which all simulations were performed.
|
guest ::
