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Meassuring system for building constructions
Vladař, Martin ; Franek, Lešek (referee) ; Bradáč, Zdeněk (advisor)
This thesis deals with the measurement of physical quantities in building using decentralized system for data collecting. The system consists of Raspberry Pi as a master device of the system. There are three branches connected to this master device. Each branch consists of up to 32 modules for data-concentration from sensors of physical quantities. The Raspberry Pi has implemented web interface for displaying measured values and system administration.
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Innovative tool for removing bad pronunciation of the letter "R"
Rexová, Natálie ; Sekora, Jiří (referee) ; Harabiš, Vratislav (advisor)
The purpose of this final thesis is to find out about Speech Therapy and to design a device which would help with oscillation of human tongue when the sound r is pronounced. To better understand this subject first part of this thesis takes interest in evolution and physiology of human speech. Next the most common articulation disorder Dyslalia is named and methods for treating Dyslalia are described. In practical part the device for Speech Therapy is designed and created. It is based on frequency of human tongue oscillations and it helps to correct difficulties with sound r articulation. This prototype uses electric motor which is controlled by Arduino platform. Its rotational motion is converted to linear through mechanical construction simulating crank mechanism.
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Laboratory model "Girders" innovation
Žatečka, František ; Baštán, Ondřej (referee) ; Kaczmarczyk, Václav (advisor)
This bachelor thesis deals with both hardware and software innovation of “Girders” model which is a part of the subject Programmable automation controllers. The first part describes theory regarding PLC together with its programming languages and the design of a model connection scheme. The second part introduces an example consisting of pattern protocol, programs written in LAD and SCL and its visualization.
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Laboratory model of an machine for printed wiring
Posekaný, Jan ; Kaczmarczyk, Václav (referee) ; Zezulka, František (advisor)
Production of printed circuit boards using three-axis CNC milling machine is suitable for small batch production. Milling machine consists of three axes, which are controlled by stepper motors. Controlled by a PC connected to the control electronics to communicate over the serial line. Input data is exported from the Eagle design software. The core of the control unit´s processor family, the AVR ATmega16, motor drivers for the ATmega8. Transfer between PC and the device is implemented using a virtual person through USB.
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Energy efficient wireless sensor platform for a snow load measurement
Bačinský, Martin ; Kouřil, Jiří (referee) ; Mráz, Ľubomír (advisor)
This bachelor thesis describes the problematics of snow load measuring. At first, sensors' principles of functionality for indirect measurements are mentioned. In the second part, the problematics of direct measurement with tensiometer takes place. The construction of wireless apparatus with the help of module ZigBit for the snow load measurement is the result of this work. Sensor board is designed in Eagle software, obeying standards for machine vacuum pickup and fabrication. The apparatus works in two modes. During indirect measuring, additional processing of data is necessary. In this mode, the sensor board has very low energy consuption and therefore long service life also after a battery connection. In the second mode, the apparatus is automatically sending data about actual snow load of particular roof. The whole machine communicates with the help of ZigBit module and ZigBee protocol IEEE 802.15.4. The communication distance between sensorial points is allowed up to 100m. At last but not at least, tensiometer UTILCELL M230 measurements are attached. In attachments, chemas and printed circuit boards are presented, too. Except documentation, the CD contains also libraries for components and details for DPS machine production in Eagle Software.
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Data concentrator
Dvorský, Petr ; Arm, Jakub (referee) ; Fiedler, Petr (advisor)
The topic of this thesis is the design and realization of a modular Data concentrator for various types of measurements in diverse conditions. The device conception, basic principles, design and functionality are described herein. Also, the lightweight protocol design for radio communication, standardized XML format for data storage and cloud usage are described. The electrical design of the device as well as the design of the printed circuit board was made using the Eagle Autodesk electronic design automation software (Eagle Autodesk EDA). The control software written in C/C++ for a target microcontroller (ESP32-WROOM-32) is based on a FreeRTOS platform and ESP-IDF framework. An IDE for managing this software is Visual Studio Code with PlatformIO extension. Selected and used Cloud Platform is ThingSpeak from Mathworks, which uses certain components from Matlab platform.
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Doppler blood flow indicator
Byrtus, David ; Čech, Petr (referee) ; Rozman, Jiří (advisor)
Bachelor´s thesis deals with methods for measuring Doppler velocity and blood flow in non-directional system with unmodulated carrier wave, system design indicator of blood flow for a frequency of 4 MHz ultrasound intensity of 100 mW/cm2 and evaluating methods of Doppler signals.
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Subharmonic Mixers for Microwave Bands
Kintr, Jindřich ; Frydrych, Jiří (referee) ; Urbanec, Tomáš (advisor)
The task of this master’s thesis is design and implementation subharmonic mixer for the microwave band. Subharmonic mixer is based on the principle of antiparallel diode. In the first two parts are theoretically described mixers (subharmonic mixer) and topology suitable for implementation. Another work describes the design subharmonic mixer. The proposal is implemented in the program Ansoft designer. DPS is created in Eagle or in Ansoft Designer. The mixer is designed and implemented first on the lower frequency and consequently at higher frequencies (24,048 GHz and 47,088 GHz). Work also includes the measurement results of the mixer.
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Power over Ethernet implementation
Šturala, Martin ; Musil, Petr (referee) ; Krajsa, Ondřej (advisor)
The aim of this bachelor thesis is to design and implement a power supply module for an end station network device with an optional 5 V or 3.3 V output, which supports power over ethernet technology, both for active and passive method of this technology. The work is focused on the design of a hardware solution to this problem. A Texas Instruments TPS2373 chip supporting the latest technology according to the IEEE802.3bt specification was chosen to implement active POE. The LM317 linear stabilizer was chosen to implement the passive POE.
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Smart home base station
Vašek, Jiří ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
This Bachelor thesis is focused on the design of embedded system built on the RCM3000 RabbitCore module developed by Rabbit. Periphery for communication with external devices such as detectors and sensors will be designed for this module. In the end, the design process of a motherboard with all essential procedures is proposed.
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