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Implementation of SCADA architecture into fiber optic seNSING systems
Šišolák, Filip ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The bachelor thesis deals with the issue of data control and acquisition using SCADA technology and the subsequent implementation of two-way communication. The theoretical examination also includes an analysis of the current state of use of SCADA in optical sensing systems. In view of the shortcomings of the available SCADA systems, our own software programmed in the LabVIEW development environment is implemented. The Modbus TCP protocol is used for communication with the myRIO platform. Part of the work is also the analysis of the maximum achievable throughput with the Modbus TCP protocol.
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100G passive optical network
Sporni, Alex ; Tomašov, Adrián (referee) ; Horváth, Tomáš (advisor)
This diploma thesis deals with the current state of development of passive optical networks, with the main emphasis on high-speed passive optical networks of 50 Gb/s and higher. The opening part of the thesis provides a theoretical introduction to optical access networks, their division, elements of passive optical networks and the subsequent analysis of the latest standards. As part of the implementation, simulation topologies for various simulation scenarios are designed in the VPIphotonics Transmission Maker tool. The proposed simulations are properly evaluated in the next chapter. The quality of the proposed simulation topology is assessed using bit/symbol error rate and in some cases in combination with an eye diagram (quality factor). The output of the work are simulation scenarios for various configurations and modulation formats of the proposed optical networks. The output of the work is also a laboratory task, which will be used for teaching purposes.
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Extension of optical fiber transmission system
Horský, Tomáš ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The diploma thesis describes the elaboration of a program for the simulation of an optical transmission path. The work introduces the basic parameters of optical transmission, such as attenuation, dispersion and bandwidth. Furthermore, the techniques of line code and error detection are described in the work, especially a cyclic redundancy sum. The key parameter of this thesis is dispersion of the optical signal. The work includes the characteristics of the eye diagram and its analysis. The resulting program can also be used to measure the real transmission route and its parameters.
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Measurement and monitoring of optical fiber infrastructures
Baláž, Dominik ; Tomašov, Adrián (referee) ; Münster, Petr (advisor)
This bachelor thesis deals with measurement and monitoring methods on optical path. The basic principles and transmission using optical fibers, optical fibers, band splitting and transmission characteristics such as attenuation and dispersion are discussed. The principle of wave multiplexing and recommendations according to ITU-T standards are also presented. Afterwards, measurements on optical fibres are described, instruments and methods for measuring and monitoring the optical path are presented in detail, and these instruments are compared in terms of their parameters and individual functions. In the practical part, cleaning of connectors, inspection of connectors, measurement of optical path without bending and with different bend radii using OTDR, direct method and measurements using FC BERT application, which is a substitute for the monitoring system, are described, the values from these measurements are evaluated both numerically and graphically.
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Software defined networks
Denisov, Artem ; Horváth, Tomáš (referee) ; Tomašov, Adrián (advisor)
The content of this work is a description of the ONOS controller for software defined networks (SDN) and the design of laboratory tasks to demonstrate the activities of the controller. Part of the work is also a description of the basic technologies on which the operation of SDN mechanisms and the use of VxLAN technology in these networks is based. Next, the described principles will be tested in terms of network infrastructure virtualization.
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Design of computer exercises for security of information systems
Nakládalová, Kateřina ; Tomašov, Adrián (referee) ; Myška, Vojtěch (advisor)
Nowadays, many services are provided in an online environment through web applications. A large amount of data and sensitive information is thus transmitted through cyberspace, which can be stolen by attackers if the systems that handle it are not sufficiently secure. Education in Information Security is therefore crucial. To this end, a web application in the Java programming language was therefore created to demonstrate attacks aimed at it. The application is constructed using Spring framework and connected to PostgreSQL database. The most common attacks on web applications are demonstrated and described in this thesis which are Brute force attack, SQL injection attack, Cross-site scripting attack and Cross-site request forgery, access control vulnerabilities, sensitive data exposure, data inconsistency in web application and interference with web application parameter manipulation. Specific ways of implementing protection against these attacks are given to ensure their safe use. This work can be used as a useful source of information for web application developers and users who want to gain knowledge about the issues of cyber attacks and thereby reduce the risk of their occurrence.
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Data processing from fibre optic temperature sensors
Carboch, David ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The bachelor thesis is dealing with fiber optic sensor systems, their division and properties. Furthermore, the thesis discusses the possibilities of fiber optic measurements in the nuclear power environment. Then the thesis contains possible methods of temperature measurement and their comparison. The thesis deals with the design of the sensing probe. Through the probe, the mechanical resistance of the sensing fiber and the handling of the sensing fiber have been improved. Furthermore, the thesis deals with the creation of an interactive chart of the relative temperature of a nuclear reactor in real time. In the chart, the dependence of reactor temperature change on reactor power and air temperature change can be observed. The measured results can be exported from the chart.
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Automated coffee roaster with a sensor system
Halaš, Marek ; Münster, Petr (referee) ; Tomašov, Adrián (advisor)
The aim of this work is to design and build a portable coffee roaster with a sensory system. First, the work describes the types of roasters and a description of what happens to the coffee beans during roasting. The next part is focused on the actual design and construction. Designs are given here, and individual components and their connection to the development board are also described here. It also includes software that controls roasting and can perform the entire roasting process, from start, to finish.
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Accelerated sensor data analysis using an embedded system with a graphics processing unit
Maczkó, Adam ; Myška, Vojtěch (referee) ; Tomašov, Adrián (advisor)
The thesis deals with two main goals, namely the acceleration of data analysis and the subsequent visualization of this data. The purpose is to speed up the supplied application so that it is suitable for protecting optical infrastructures through real-time analysis of polarization state changes and visualization of its outputs. The thesis describes topics that are important in terms of accelerating computations on the graphics processor, particularly principles of parallelism, parallel programming, processes, threads, and parallel architectures. In addition, the thesis describes the capabilities of the Jetson Nano platform. The output of the thesis is an application that is capable of performing computations on the graphics processor and has a web interface for visualizing the analyzed data. The PyTorch library was used for acceleration on the graphics processor. Visualisation was achieved through the React framework in conjunction with the react-spectrogram and ApexCharts libraries.
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