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Educational tool with power supplies
Junasová, Veronika ; Šteffan, Pavel (oponent) ; Levek, Vladimír (vedoucí práce)
This work deals with design and realization of board with numerous power supplies. It includes linear power supply, switching supply without inductor, switching supply with inductor using step-up and step-down converter. The board allows to choose between various output voltages, several input filters, output filters, loads and it enables to measure the temperature of used power supplies. It can be used for education and practical demonstration of basic properties, advantages and disadvantages of these supplies. Part of the thesis is a description of power supplies for low voltages, design of educational board and demonstration of results.
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Motion measurement by inertial sensors
Junasová, Veronika ; Šteffan, Pavel (oponent) ; Levek, Vladimír (vedoucí práce)
This work deals with measuring specific types of movement in space using inertial sensors. It focuses on accelerometer, gyroscope and magnetometer. There is basic introduction to mentioned sensors, description of means of filtration their measurements and related mathematical part. The work contains design of board with selected sensors, description of sensors calibration, measurement of inclination and azimuth, optimalization of measurement, implementation of chosen filter. Functionality of measurement, calibration and filtration is demonstrated by results of measurement.
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The Precise Measurement of Magnetic Azimuth
Junasová, Veronika ; Levek, Vladimír ; Šteffan, Pavel
This article deals with measuring magnetic azimuthusing inertial sensors. It introduces the steps in this process andobstacles that need to be solved in order to achieve more preciseresults. The magnetic azimuth can be determined using onemagnetometer; however, the precision in such measurement islimited. Therefore, this article also introduces measurement ofrelative azimuth acquired by the gyroscope. The essential part ofprecise measurement is the calibration of the mentioned inertialsensors, which is described in detail. The process of calibration issupported with equations, graphs, and tables. The measurementitself consists of an output from the magnetometer. The relativeazimuth acquired from the gyroscope is then combined using acomplementary digital filter with magnetic azimuth from moreaccurate magnetometer. The final results show the improvementobtained with the presented method. The article also containsinformation on a compact device designed for simple calibrationand measurement with the mentioned sensors.
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Door security system
Drugda, Andrej Marián ; Junasová, Veronika (oponent) ; Šteffan, Pavel (vedoucí práce)
This bachelor thesis deals with the design of a door security system supporting entry using a numeric password, RFID card reader and also using fingerprint biometric authentication. The whole project is situated as a demonstration of various methods of security identity verification. The main part is a material model of the door, which is intended to provide visual and clear information about the possibilities of security systems. In addition to safety elements, the work also describes the selection and parameters of the microcontroller on which the entire system is based.The work also contains essentials such as a description of the system's functionality, a display of block diagrams, hardware and software equipment, or step-by-step implementation of the project.
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Univerzální modul pro podporu týmových her
Zemanová, Renata ; Junasová, Veronika (oponent) ; Šteffan, Pavel (vedoucí práce)
Cílem práce je navrhnout elektronické zařízení, Univerzální modul, které slouží jako pomocník při týmových outdoorových hrách. Při návrhu je kladen důraz na bezpečnost, jednoduchost a nízkou cenu. Kvůli outdoorovému použití je řešena také voděodolnost. Tato práce se zabývá výběrem a návrhem elektroniky. Je kladen důraz na výběr světelné signalizace, bezdrátového modulu, napájení a mikrokontroléru. Návrh DPS probíhal na 2 spojených deskách. Byl vytvořen firmware pro zjednodušené programování Univerzálního modulu a vznikly také demonstrační módy pro různé aktivity.
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Scalable thermal model of a transistor package
Klement, Matej ; Junasová, Veronika (oponent) ; Otáhal, Alexandr (vedoucí práce)
This diploma thesis describes methods for simulating the self-heating of a discrete transistor component inside it’s package. Two methods of measuring thermal resistance are described using information from JEDEC standards. Model of a transistor package is simulated using Ansys ICEPAK FEA in a configuration described as Junction to Case heating. Using transient temperature simulation with parametric sweeping a dataset of heating curves was created for every transistor configuration. The heating curves were transformed to their time-constant spectrum representation using algorithms described in JEDEC standards implemented in Python for diploma thesis’s purpose. The time constant spectrum of each heating curve was simplified into two element Foster network and converted to Cauer ladder. For each parameter sweeping, an interpolation function of the ladder element was fitted. The scalable thermal model was constructed using the interpolation functions and simulated in LTSpice. The results from LTSpice simulation were compared against the FEA simulations.
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Motion measurement by inertial sensors
Junasová, Veronika ; Šteffan, Pavel (oponent) ; Levek, Vladimír (vedoucí práce)
This work deals with measuring specific types of movement in space using inertial sensors. It focuses on accelerometer, gyroscope and magnetometer. There is basic introduction to mentioned sensors, description of means of filtration their measurements and related mathematical part. The work contains design of board with selected sensors, description of sensors calibration, measurement of inclination and azimuth, optimalization of measurement, implementation of chosen filter. Functionality of measurement, calibration and filtration is demonstrated by results of measurement.
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Educational tool with power supplies
Junasová, Veronika ; Šteffan, Pavel (oponent) ; Levek, Vladimír (vedoucí práce)
This work deals with design and realization of board with numerous power supplies. It includes linear power supply, switching supply without inductor, switching supply with inductor using step-up and step-down converter. The board allows to choose between various output voltages, several input filters, output filters, loads and it enables to measure the temperature of used power supplies. It can be used for education and practical demonstration of basic properties, advantages and disadvantages of these supplies. Part of the thesis is a description of power supplies for low voltages, design of educational board and demonstration of results.
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