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Electronic instrument for environment monitoring during plants growing
Žák, Jaromír ; Kuchta, Radek (referee) ; Hubálek, Jaromír (advisor)
The main goal of this project is to make electronic instrument for monitoring environment during plants growing for Mendel University of Agriculture and Forestry in Brno. The new device will replace current analog recorder of temperature and humidity. New device will be extended by measuring atmospheric pressure, illumination and CO2 concentration. Main advantage of electronic measuring is better lucidity of gained values. New concept allows easier comparison new values with earlier measured data.
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Network datalogger
Maštálka, Daniel ; Žák, Jaromír (referee) ; Šteffan, Pavel (advisor)
Work is about theoretical proposal of network datalogger, which logs indoor and outdoor temperature and humidity. As microcontroler is used development kit STM32 Value Line Discovery and for comunication with server is used Ethernet protocol. As primary display is used remote access to server, as secondary alphanumeric liquid crystal display.
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Optimization of the switching power supplies with synchronous rectifier
Skácel, Josef ; Macháň, Ladislav (referee) ; Žák, Jaromír (advisor)
This thesis deals with switching circuit topic, especially switching power supplies. There are switching circuits without inductance and their benefits presented in the thesis. Basic topologies of switching power supplies, their properties, application area and functions of basic types of converters are also described. The next section focuses on special resonant switching power supplies and synchronous. The main part of the work is carried out simulations using three synchronous rectifiers. The work includes practical design of an SMPS with synchronous rectifier.
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The MEMS sensors usability for position detection
Bobalík, Lukáš ; Sedláček, Jiří (referee) ; Žák, Jaromír (advisor)
Within this Master’s thesis, design and construction of a strapdown inertial navigation system based on MEMS sensors is described. The thesis includes theoretic analysis of physics behind determining the position of an object based on the object’s aceleration and changes in the object’s orientation in space. Included is also an overview of mathematical methods related to the position calculation.
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Ultrasonic distance measurement
Giemza, Michal ; Žák, Jaromír (referee) ; Sedláček, Jiří (advisor)
This thesis describes the design and realization of an ultrasonic distance meter. Is discussed about the principle of distance measurement using ultrasound and all physics laws, that occur during the measurement. It was selected the most appropriate measurement method, was also discussed about different types of ultrasonic transducers and was selected an appropriate converter for the specified task. The following part describes all function parts of the meter together with the processing of the detected ultrasonic signal. Next part is focused on the realization of the meter and programming, including the control of the graphical display and communication over the USB bus. The last part deals with the measurement with the completed meter to verify the functionality and the right choice of measurement method and circuit solution.
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The Sport Activity Digital Recorder
Raninec, Michal ; Žák, Jaromír (referee) ; Macháň, Ladislav (advisor)
This paper discuss the design of multifunctional device used as the digital recorder for sport activity. The general aim is to explore theory issues, construct the device and develope software for the application. Components were chosen considering low weight and power consumption and with as accurate tracking as possible.
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The Sensor Systems Design and Optimization for Energy Harvesting Applications
Žák, Jaromír ; Husák, Miroslav (referee) ; Bajer, Arnošt (referee) ; Hubálek, Jaromír (advisor)
Dissertation thesis is focused on using alternative energy sources called energy harvesting. This thesis offers a solution to problems with autonomous powering of sensor networks if primary power source recovery is impossible. In these cases, energy of the external power (e.g. temperature, light, motion) should be used. Proposed solution should be especially used in the field of medical applications (e.g. cochlear implants, pacemakers, insulin pumps). Long time monitoring of the personal health status is also possible when employing automated sensor systems. In this work, there is state of art review relating to the low power energy sources for an alternative powering of sensor systems. It was observed that existing systems are almost prepared for the implementation of energy harvesting power sources. The energy harvesting power sources have been developed by numerous researcher teams around the world, but there are only a few variants of power management circuits for effective energy gaining, storing and using. This area has a huge potential for the next research. The issues regarding to the distribution of gained energy are solved on the complex level in the thesis. For these purposes, a new simulation model of the whole system (fully implantable artificial cochlea) including its subcircuits was developed in the SPICE environment. It connects independent subcircuits into a single comprehensive model. Using this model, a few novel principles for energy distribution (e.g. Charge Push Through technique) was developed. In the near future, these techniques are also applicable to the design of versatile sensor systems.
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Smart Nightstand Device
Vávra, Jan ; Žák, Jaromír (referee) ; Macháň, Ladislav (advisor)
Master’s thesis describes design of smart nightstand device. Aim of this system is to monitor and recognize stages of sleep with subsequent transfer of the data to alarm clock to provide the most comfortable awakening. The alarm clock is backed up by batteries. The system controls parameters of surrounding environment using advanced sensors. The device is equipped with a removable light part which is backed up by power supply for illumination during a potential power outage. A pad for wireless charging with standard Qi is also part of this system.
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Control electronics for biohazard box
Pavlas, Lukáš ; Žák, Jaromír (referee) ; Macháň, Ladislav (advisor)
The submitted work describes design of the electronic working condition monitoring system for laboratory Is analyzed in detail the issue of categorization of laboratory laminar flow hood, determine characteristic of operating variables and their monitoring. Next is described a functional specification of the whole device and it follows the design concept of the possible solutions along with a selection of components for implementation. At the last part is described proposal communication protocol for communication between a master unit and auxiliary slave unit.
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Image sensor signal data processing
Růžička, Jakub ; Macháň, Ladislav (referee) ; Žák, Jaromír (advisor)
This diploma thesis deals with an image capturing by a CMOS image sensor and controlling of graphical LCD displays using specialized integrated circuits. A theoretical research on the topic and design of the system designed for ease of processing, transmitting and still images displaying based on this research is described in this work. The output of the work is complete the device realized.
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