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Distance and position determination using ultrasound
Bartoš, Dalibor ; Šteffan, Pavel (referee) ; Hejátková, Edita (advisor)
This thesis describes distance measurement using ultrasound and its application in determining position of an object. First part of this thesis describes principles of ultrasound wave propagation, piezoelectric transducers, basics of both triangulation and trilateration and different kinds of park assist systems. The second part contains description of algorithms designed to determine position of two objects at the same time. Last part of the thesis describes implementation of created algorithms into software and also modules used in the test measurement.
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RaspberryPi Expansion Board
Divácký, Tadeáš ; Macho, Tomáš (referee) ; Kopečný, Lukáš (advisor)
This thesis deals with the design and subsequent realization of the expansion board for RaspberryPi. At the beginning, all the integrated circuits selected for this work are listed. In addition, the power supply section for power circuits and RaspberryPi is described here, as well as the realization of the board.The last part is focused on software and firmware that is in ATmega series and part of Raspberry Pi which includes listed libraries that sum used for the functionality of the program and written library for handling integrated circuits.
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Laboratory Model of the Vortex Speed Indicator
Kazda, Ondřej ; Kolka, Zdeněk (referee) ; Biolková, Viera (advisor)
This work is concerned with posibility of measuring a wind flow by Von Karman vortex sheed structure. The bluff body is situated in the way of air flow propagation and consequentally vortexes will be appeared. Important part of speedmeter design is measurment chamber must allow to vortex sheed propagation. The transient and the reciever are situated vertically to propagation of flow.The Ultrasonic carrier is transmitted and modulated by freqency of vortex sheeding in measurment chamber.Demodulator uses PLL to “focusing“ detection of the ultrasonic beam. This can be indicated like lock and unlock phase loop. From known value of sheed frequency can be directly calculated speed of flow.
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Sensor fusion for detecting and locating people in a room
Vondráček, Jakub ; Dobossy, Barnabás (referee) ; Najman, Jan (advisor)
This diploma thesis deals with the problem of fusion of several sensors for the purpose of detecting and locating people in a room. It is primarily about using measured sensors and implementing them in such a way that their connection creates a system that has obvious advantages compared to more expensive single sensor solutions. In the first part of the work, research is carried out, which presents the basic issues of detection, localization and counting of people in rooms. To be used in the practical part of the work, it is also indicated here which specific sensors can be used to achieve these functions and which control units are suitable for such a system. Finally, it summarizes specific components and software tools, which are further supplemented in the practical part of the work. The rationale for this selection is also included. The second part of the thesis describes the specific design of the resulting system, which can perform the functions of detection, localization and counting of people in the room. This practical proposal is described including all starting points, connections and especially the algorithm that was used for sensor fusion. The entire system is subsequently tested, based on which its functioning is evaluated. In the last section of the thesis, the created system is supplemented with a model of a cover and wall mount.
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Distance and position determination using ultrasound
Bartoš, Dalibor ; Šteffan, Pavel (referee) ; Hejátková, Edita (advisor)
This thesis describes distance measurement using ultrasound and its application in determining position of an object. First part of this thesis describes principles of ultrasound wave propagation, piezoelectric transducers, basics of both triangulation and trilateration and different kinds of park assist systems. The second part contains description of algorithms designed to determine position of two objects at the same time. Last part of the thesis describes implementation of created algorithms into software and also modules used in the test measurement.
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Using distance sensors as sensors for counting persons
Engel, Michal ; Krajsa, Ondřej (referee) ; Novotný, Vít (advisor)
The subject of this work is the use of sensors to measure distance for counting people. First, I focus on the general description and physical principles of photo sensors and their parameters. Then I focus on the general description and physical principles ultrasonic sensors and their parameters. Follows discribe sensors which can be used for counting peoples. Followed by measuring workplace design and it is implementation. The last section is devolted to design algorithms for data processing.
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RaspberryPi Expansion Board
Divácký, Tadeáš ; Macho, Tomáš (referee) ; Kopečný, Lukáš (advisor)
This thesis deals with the design and subsequent realization of the expansion board for RaspberryPi. At the beginning, all the integrated circuits selected for this work are listed. In addition, the power supply section for power circuits and RaspberryPi is described here, as well as the realization of the board.The last part is focused on software and firmware that is in ATmega series and part of Raspberry Pi which includes listed libraries that sum used for the functionality of the program and written library for handling integrated circuits.
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Laboratory Model of the Vortex Speed Indicator
Kazda, Ondřej ; Kolka, Zdeněk (referee) ; Biolková, Viera (advisor)
This work is concerned with posibility of measuring a wind flow by Von Karman vortex sheed structure. The bluff body is situated in the way of air flow propagation and consequentally vortexes will be appeared. Important part of speedmeter design is measurment chamber must allow to vortex sheed propagation. The transient and the reciever are situated vertically to propagation of flow.The Ultrasonic carrier is transmitted and modulated by freqency of vortex sheeding in measurment chamber.Demodulator uses PLL to “focusing“ detection of the ultrasonic beam. This can be indicated like lock and unlock phase loop. From known value of sheed frequency can be directly calculated speed of flow.
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