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Measurement of ultrasonic beam parameters
Hlavatý, Radek ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
The work deals with methods of measuring the parameters of the ultrasonic beam generated by piezoelectric sensors. The theoretical part contains a literature search of methods for the analysis of the ultrasonic beam generated by piezoelectric transducers with dimensions of units of millimeters. The problematics of measurement using piezoelectric or optical fiber hydrophones is investigated in more detail. The scope of the practical part of the work is the design and implementation of measuring equipment that allows spatial analysis of the beam during propagation by a complicated signal path, for automotive level and concentration sensors of the company Vitesco Technologies s.r.o. The system uses a hydrophone method to measure the ultrasonic beam. Due to test measurements, the repeatability of the measured results is confirmed, the results are discussed in the end.
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Ultrasonic field of level sensors measurement
Hlavatý, Radek ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
The paper deals with the description of the ultrasonic field around the piezoelectric sensors. The theoretical part serves as an overview for the understanding the ultrasound problematics. More closely studied is the phenomenon of ultrasound wave attenuation. At the end of the theoretical part, three different methods of field measuring were selected and described. The practical part of this work is a more detailed description of the whole measuring system available in the Continental laboratory, that has been put into operation. The system uses a reflection method to measure the ultrasonic field. Automated way of data processing in the form of a script in Python and a macro in Excel was designed. Uncertainties were determined by the test measurements, so was the repeatability of the measured results, that correspond to the physical theory.
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Measurement of ultrasonic beam parameters
Hlavatý, Radek ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
The work deals with methods of measuring the parameters of the ultrasonic beam generated by piezoelectric sensors. The theoretical part contains a literature search of methods for the analysis of the ultrasonic beam generated by piezoelectric transducers with dimensions of units of millimeters. The problematics of measurement using piezoelectric or optical fiber hydrophones is investigated in more detail. The scope of the practical part of the work is the design and implementation of measuring equipment that allows spatial analysis of the beam during propagation by a complicated signal path, for automotive level and concentration sensors of the company Vitesco Technologies s.r.o. The system uses a hydrophone method to measure the ultrasonic beam. Due to test measurements, the repeatability of the measured results is confirmed, the results are discussed in the end.
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Ultrasonic field of level sensors measurement
Hlavatý, Radek ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
The paper deals with the description of the ultrasonic field around the piezoelectric sensors. The theoretical part serves as an overview for the understanding the ultrasound problematics. More closely studied is the phenomenon of ultrasound wave attenuation. At the end of the theoretical part, three different methods of field measuring were selected and described. The practical part of this work is a more detailed description of the whole measuring system available in the Continental laboratory, that has been put into operation. The system uses a reflection method to measure the ultrasonic field. Automated way of data processing in the form of a script in Python and a macro in Excel was designed. Uncertainties were determined by the test measurements, so was the repeatability of the measured results, that correspond to the physical theory.
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Analysis of Power Play and playing Two men Short in the First League Ice Hockey Matches in the Season 2005/2006
Hlavatý, Radek ; Perič, Tomáš (advisor) ; Vojta, Zdeněk (referee)
Title of the work: Analysis of Power Play and Playing Two Men Short in the First League Iee Hockey Matches in the Season 2005/2006. The aim of the thesis: The thesis focuses on the analysis ofthe power play and playing two men short (penalty killing 5:3) from the point of view of attack and defence in all our first league teams. Another aim is to determine which pattems of the game conclusion and defence are the most successful. Methods: The method of observation was used in the analysis of video records, the research was completed by statistical data and information gained from questionnaires. Results: 232 power plays 5:3 were analyzed, in which 49 goals were scored, and 67 goals were scored in 370 power plays 5:3. The most successful patterns are mentioned in this work, the position of defendíng players 1 - 1 - 1 appeared to be the best in the defence play. Key words: Power play, penalty killing, playing two men short.
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