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Time synchronization by IEEE1588 protocol
Hříbek, Šimon ; Arm, Jakub (referee) ; Fiedler, Petr (advisor)
The thesis focuses on implementing time synchronization using the PTP protocol on the STM32H747 platform to assign precise timestamps to acquired samples using the ADC converter. The chosen platform is specifically the STM32H747 Discovery Kit development board. The thesis includes a description of available libraries necessary for implementing time synchronization. One area also covers the procedure for setting up the Ethernet interface available on the development kit. The thesis also addresses the selection of suitable methods for evaluating the achieved results.
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Diagnostics of the source part of photovoltaic power plants
Turinský, Matěj ; Burian, František (referee) ; Fiedler, Petr (advisor)
The aim of this thesys is to define development requierements for HW of monitoring device for the source parts of photovoltaic power plants and afterward implement sufficient SW equipment. Thesys analyzes types of faults within a power plant its consequences and possible ways of detection. It is followed by selection of measurements and HW components for monitoring device, its complementation and implementation of control program for the evaluation unit. Program should manage a measurements with afterward diagnosis and communication with surrounding systems according to the G3-PLC standard.
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Automation of test containers for valve testing
Dražil, Jan ; Bradáč, Zdeněk (referee) ; Fiedler, Petr (advisor)
This thesis deals with the design and implementation of a control algorithm for the test units used for testing valves used by the European Space Agency (ESA). The three types of valves to be tested are FMV, RV, TV. The medium for FMV and RV tests is compressed air. The tests on the TV branch are performed with water.
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Implementation of Communication Technology complying IEC 61850 as the Demonstrational DCS System
Kozák, Ondřej ; Arm, Jakub (referee) ; Fiedler, Petr (advisor)
This thesis deals with the issue of communication of protection by IEC 61850 standard and reading, control and visualization of protections by DCS systém 800xA and PLC AC500 from ABB and extended visualization by cloud service Grafana. The IEC 61850 standard, its protocols anad the topologies used have been descibed in this work. Furthermore, the basic functions of the instruments used were described. The main part describes the procedure of creating SCD file for communication configuration and subsequent uploading to individual systems, creating visualization in DCS 800xA system, setting up communication between protection devices and reading from them using AC 500 PLC. For the cloud service there is a description of the implementation of the MQTT broker for sending data between PLC and database Influxdb that stores the data and forwards it to Grafana visualization environment.
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Power Line Communication for Home Automation Applications
Hromádka, Michal ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
This thesis describes the design of a modem for a communication over residential power lines. First part is focused on the history, suitable frequency bands, modulation techniques and mainly on the selection of the optimal modem device. Second section contains the description of the hardware design of the modem itself and clarifies the implementation of the PLC module to be used as a communication interface for a full residential automation solution. Last chapters of this thesis introduce the communication protocol, design of the software for the ATmega32 MCU and present of the final field testing under real conditions.
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Hardware and software of a smart home appliance
Blaha, Vít ; Kaczmarczyk, Václav (referee) ; Fiedler, Petr (advisor)
Nowadays, the interest in smart appliances, which enable consumption reduction or consumption shifting approach, grows up. Such appliances can react to actual situation in the distributional network. From the energy distributor point of view, the activity of these appliances brings improvement of stability in the distribution network, while for the end customer there is possibility of the saving money. This thesis describes a transformation of standard fridge to smart fridge controlled by microcomputer Raspberry Pi. The smart fridge can communicate with supervisor system and according to its instructions change its behavior (temperature set point). The appliance can be manually controlled by a group of buttons, while its state can be visualized on the alphanumeric display. Last but not least way to control the appliance is through a web interface. The thesis also describes design of printed circuit board (PCB), which is designed for connection of all necessary sensors and actuators to Raspberry Pi. Software equipment is designed in the C++ program language.
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Desing of supplementary coding switching unit
Štefl, Martin ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
The diploma thesis is dealing with the area of controlling and safety technology for the railway transportation. The problems of the design and practical realization of an functional sample of switching unit supplying the ends of a track circuit are solved here. The switching unit enables the operation of the train control system. The outline of the design is formed by a power switch operated with a microprocessor. In addition, for the increase in safety the switching unit contains a control processor, which is controlling the right function of a work microprocessor and the failure-free state of a power switch.
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Firmware for a pressure sensor with HART interfacel
Čožík, Ondřej ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
The bachelor thesis deals with draft of firmware for a capacitive sensor with HART communication protocol. At first, it briefly describes the HART protocol (principles of communication, frame structure and connectivity devices on the HART bus). Subsequently attention is paid to capacitive sensor description, method of data processing and communication method of the sensor with HART interface. The final part depicts individual parts of the firmware for the capacitive sensor (such as the method of values reading from A/D converter, data reading/writing from/to external or internal EEPROM or calculation of the measured pressure value, its temperature compensation and corresponding current loop, using D/A converter.
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Indoor flexible wireless CO2 measure system
Válek, Vít ; Fiedler, Petr (referee) ; Arm, Jakub (advisor)
Monitoring of the carbon dioxide concentration in the building is carried out for several reasons. One is to ensure hygiene conditions. With the advent of Bluetooth 5.0 came the support of mesh network technology, which is defined by the Bluetooth Mesh standard. By implementing this standard, we can create an extensive network of devices monitoring the concentration of carbon dioxide in the building. Based on the monitored concentration, we can control the air conditioning and ventilation of the spaces, ensuring that the hygiene conditions are met. Thanks to the compatibility of Bluetooth Mesh with Bluetooth Low Energy, it is possible to access individual nodes, e.g. from a mobile phone. The aim of this work is to design and implement a measuring system whose elements will communicate with each other using Bluetooth Mesh wireless technology.
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