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Frequency measurement
Milota, Martin ; Havlíková, Marie (referee) ; Čejka, Miloslav (advisor)
The topic of my dissertation is to verify the autocorrelation method for determining changes in frequency and other design software tools for measuring frequency. In my work I use outside the above-mentioned autocorrelation methods, Zero-crossing. The output is compared with the commercially designed software used and evaluate the results in terms of measurement uncertainties.
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Meter of powerline quality
Samek, Martin ; Horský, Pavel (referee) ; Kolka, Zdeněk (advisor)
The subject of graduation thesis is a design of line analyser according to standard EN61000-4-30 class A. The analyser is determine to be used for quality control of supplied electric power which is, during electric power transmission, affected by several disturbances. Power line analyser should measure single-phase and three-phase network parameters in LV and HV systems. Measured parameters can be shown on the full colour TFT display, stored in the device memory or sent to other devices such as PC. For communication between the device and PC the USB, Ethernet or RS485 interface are used.
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Small strain stiffness of soils and methods of its measurement
Havlíček, Jaroslav ; Miča, Lumír (referee) ; Chalmovský, Juraj (advisor)
This thesis consists of theoretical and practical part. Firstly, the soil behaviour at small-strain range and its physical nature are described. Subsequently, the individual soil parameters affecting the value of small-strain shear modulus and the shape of the stiffness reduction curve with increasing shear strain are described. The individual methods of measuring the small-strain stiffness in the laboratory and in-situ with a more detailed explanation of the evaluation of measurements using bender elements are given in the last chapter of the theoretical part. In the practical part, a device for measuring small-strain stiffness using bender elements was put into operation. The used laboratory equipment is described first and then the parameters of tested soil are given. The main chapter is measurement and evaluation of the impact of software and hardware settings and the influence of effective stress of soil on the small-strain shear modulus that is compared with predictions of empirical expressions from the literature.
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Applications of Computers in Ultramicro Aircraft
Žůrek, Daniel ; Široký, Adam (referee) ; Zemčík, Pavel (advisor)
The master thesis deals with the possibilities for monitoring the operation of ultralight aircraft or helicopters . The aim is to create a system for the determination of aircraft operating parameters with a main focus on motion detection and evaluation . The thesis describes speed sensing methods , acceleration measurement , frequency measurement methods , wireless communication , serial line communication , hardware and software implementation of the embedded system, and finally description of the implementation of the mobile application .
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Design and implementation of an automatic guitar tuner
Zatloukal, Tomáš ; Formánek, Martin (referee) ; Appel, Martin (advisor)
Goals of this thesis are design and realization of automatic guitar tuner. First, a research was carried on of availalbe tuners and sensors on the market, which is followed up by design of the hardware and software. The device processes sound emitted by string and turns guitar’s machine head via electromotor, achieving tunning. The design of the tuner is aimed to be held in one hand. Processing of entry data and control of the motor is done by development board with ESP32.
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Small strain stiffness of soils and methods of its measurement
Havlíček, Jaroslav ; Miča, Lumír (referee) ; Chalmovský, Juraj (advisor)
This thesis consists of theoretical and practical part. Firstly, the soil behaviour at small-strain range and its physical nature are described. Subsequently, the individual soil parameters affecting the value of small-strain shear modulus and the shape of the stiffness reduction curve with increasing shear strain are described. The individual methods of measuring the small-strain stiffness in the laboratory and in-situ with a more detailed explanation of the evaluation of measurements using bender elements are given in the last chapter of the theoretical part. In the practical part, a device for measuring small-strain stiffness using bender elements was put into operation. The used laboratory equipment is described first and then the parameters of tested soil are given. The main chapter is measurement and evaluation of the impact of software and hardware settings and the influence of effective stress of soil on the small-strain shear modulus that is compared with predictions of empirical expressions from the literature.
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|
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Applications of Computers in Ultramicro Aircraft
Žůrek, Daniel ; Široký, Adam (referee) ; Zemčík, Pavel (advisor)
The master thesis deals with the possibilities for monitoring the operation of ultralight aircraft or helicopters . The aim is to create a system for the determination of aircraft operating parameters with a main focus on motion detection and evaluation . The thesis describes speed sensing methods , acceleration measurement , frequency measurement methods , wireless communication , serial line communication , hardware and software implementation of the embedded system, and finally description of the implementation of the mobile application .
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Frequency measurement
Milota, Martin ; Havlíková, Marie (referee) ; Čejka, Miloslav (advisor)
The topic of my dissertation is to verify the autocorrelation method for determining changes in frequency and other design software tools for measuring frequency. In my work I use outside the above-mentioned autocorrelation methods, Zero-crossing. The output is compared with the commercially designed software used and evaluate the results in terms of measurement uncertainties.
|
|
|
Meter of powerline quality
Samek, Martin ; Horský, Pavel (referee) ; Kolka, Zdeněk (advisor)
The subject of graduation thesis is a design of line analyser according to standard EN61000-4-30 class A. The analyser is determine to be used for quality control of supplied electric power which is, during electric power transmission, affected by several disturbances. Power line analyser should measure single-phase and three-phase network parameters in LV and HV systems. Measured parameters can be shown on the full colour TFT display, stored in the device memory or sent to other devices such as PC. For communication between the device and PC the USB, Ethernet or RS485 interface are used.
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