National Repository of Grey Literature 227 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Modbus/TCP server
Kaufman, Oskar ; Macho, Tomáš (referee) ; Štohl, Radek (advisor)
This bachelor's thesis focuses on the implementation of the industrial communication protocol Modbus TCP and communication with Allen-Bradley's Logix PLC series. The aim of this work was to create a hardware prototype, implement the communication protocol into a microcontroller, and verify the functionality of the device itself and its communication through Modbus TCP. The developed device is equipped with digital inputs and outputs that can be controlled using the Modbus TCP protocol. The verification of communication focuses on the proper control of these inputs and outputs through the Logix PLC series.
Diagnostics unit for train protection system
Dvořák, Michal ; Žilka, Martin (referee) ; Tomíček, Pavel (advisor)
Aim of this work is to design electronic device capable of transfering and saving sent data from a comunication bus. First was introduced importance of such device in context of interstate rail travel. Next, the work introduces all the necessary norms, which must the device in question comply with, and how such norms affecting the design itself. This is followed by introduction of used communication protocols and buses and their implementation. Next, reader is introduced to design of the schematic and design considerations for PCB design. In the last chapter the data rate performance of the modul is evaluated.
FPGA Digital Circuit for up to 400 Gbps Transfers over Ethernet
Kondys, D. ; Smékal, D.
Network cards with a hardware acceleration feature are a popular solution for meeting the ever-increasing demands for throughput in high-speed networks. Utilizing the FPGA (Field Programmable Gate Array) chips as the hardware acceleration elements, this paper presents a generic and highly modular digital circuit for FPGA that manages the transfer of data in form of Ethernet frames at rates reaching up to 400 Gbps. To achieve this, the proposed digital circuit takes advantage of the Ethernet intellectual property (IP) blocks in high-end FPGAs from Intel. By first implementing and fine-tuning it for data rates up to 100 Gbps, the next step is expanding it to reach data rates up to 400 Gbps. The created digital circuit will then be used in the FPGA design for the XpressSX AGI-FH400G network card (among others) created by companies CESNET a.l.e and REFLEX CES. Even though the target data rate is 400 Gbps, this paper focuses on the first step, which is the utilization of the Intel Ethernet hard IP blocks to reach 100 Gbps.
Test Application for Microcontroller ESP32
Šintaj, Oliver ; Jakubík, Mário (referee) ; Dydowicz, Petr (advisor)
The bachelor thesis deals with the analysis and design of a test application for the ESP32 microcontroller for the company ELCOM, spoločnosť s ručením obmedzeným, Prešov (hereinafter referred to as Elcom). The chapter on the theoretical basis of the work describes the necessary information for working with ESP32. The next chapter focuses on the analysis of the current implementation. The last chapter presents the proposal and the form of implementation together with the benefits of the new proposal.
Desing of a Company Network Infrastructure
Přikryl, Adam ; Novotný, Vít (referee) ; Ondrák, Viktor (advisor)
The bachelor's thesis deals with the design of a computer network for a manufacturing company. The first part is devoted to the analysis of the current state of the company, its facility, needs, current network and the investor's requirements for a new network. The second part summarizes the theoretical background needed to understand the issues of computer network design. The actual design itself is covered in the third part. It is based on an analysis of the current state and includes the selection of passive layer elements, design of cable routes, recommendations for active elements and economic evaluation.
History of computer network technologies
Stebnický, Zbyněk ; Heriban, Pavel (referee) ; Roupec, Jan (advisor)
This bachelor thesis explores the gradual development of technologies utilized in computer networks. Furthermore it describes the creation of the internet in the Czech Republic, specifically it examines the FME BUT network.
Design and implementation of a universal NFC reader.
Jirásek, František ; Kaczmarczyk, Václav (referee) ; Baštán, Ondřej (advisor)
The essence of this bachelor´s thesis is the design and subsequent implementation of a universal NFC reader, which will be built into the school Testbed called "Self-employed bartender". The reader will act as a base for glasses containing NFC tags, from which it will then be able to find out the complete recipe of the final product to be mixed into the glass. In addition, all performed functions will be signaled by RGB LE diodes.
Submicrosecond digita trigger
Valík, Jan ; Skácel, Josef (referee) ; Levek, Vladimír (advisor)
The bachelor thesis deals with theoretical basis to design and manufacture the device, which triggers digital edges at 32 inputs in total, timestamps them at submicrosecond time base and sends out via EtherCAT industrial protocol to superior control system. The research on existing solutions and the design based on their selection and task limitations will be done, the device will be manufactured and measurements will be taken to provide final judgement on their fit of task definition.
Meteorological station system
Čada, Jan ; Balík, Miroslav (referee) ; Lattenberg, Ivo (advisor)
This bachelor thesis deals with the design and implementation of a online meteorological station system, which consists of individual weather stations that communicate via the Internet with the server. The first part of the thesis discusses the principles of measuring major meteorological variables and deals with the selection of suitable sensors for measuring temperature, atmospheric pressure, humidity, wind speed and rainfall. In the practical part, one of the weather stations based on Raspberry Pi Zero microcomputer is designed and realized. As a complement to the measured data, the station includes a camera that captures the view from the site where the meteostation is installed. 3D printing is used to realize most of the mechanical parts, it has the advantage of speed, accuracy and easy reproducibility. For the measurement of temperature, pressure and humidity, a combined sensor BME280 from Bosch is used, which is placed in a small Stevenson screen. The wind speed is measured by a cup anemometer whose rotation is sensed by an integrated Hall sensor. The output pulses are then counted using the PCF8583 circuit, which has an I2C interface for reading the values with a Raspberry Pi microcomputer. Special attention is paid to the construction of a custom calibratable tipping bucket rain gauge with a resolution of 0,5 mm, whose mechanical motion is also sensed by a Hall sensor as in the anemometer. The reading of the data from sensors and sending it to the server is handled by a Python script. For storing and presenting data to users, a custom server solution based on LAMP webserver is implemented, its source codes are written in PHP, HTML, JavaScript and CSS. In addition to the web interface, which displays the data in graphs, the measured data can be also presented to the user via an application for mobile devices based on Android. The application was developed in C# using the Xamarin framework in the Microsoft Visual Studio development environment. Among other things, it implements a widget for quick access to the measured values directly from the home screen. In the final part of the thesis, interesting findings obtained by observing the measured values are mentioned.
Intelligent wattmeter with network communication options (Ethernet / WiFi)
Haluška, Daniel ; Juráň, Radovan (referee) ; Rusz, Martin (advisor)
The goal of the Bachelor Thesis is the implementation of a measuring device for measuring alternating voltage, current and calculating of power consumption. A voltage divider with one-way offset is used for voltage measurement, and the ACS712 integrated circuit with a Hall sensor provides electric current measurement. The Arduino singleboard computer, for which the OLED display is suitable, takes care of the representation and calculation of the electrical power. Furthermore, this device allows communication with the Internet and through the server allows a simple graphical display of measured data. The manufactured measuring device allows measuring power regular outlet up to 3680 W.

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