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Beehive security system against unauthorized manipulation
Milota, Martin ; Münster, Petr (referee) ; Dejdar, Petr (advisor)
This master thesis deals with the design of beehive security system against unauthorized manipulation. The system uses LoRaWAN wireless communication technology for data transmission. The device records the movement of the beehive using an accelerometer and then locates the beehive using a GPS module. The low-energy system works via a battery-powered ESP32 microcontroller and is located on a beehive. The battery is charged using a solar panel. The system can be modularly expanded with additional sensors to monitor the condition of the bees. The device has been tested in practice, where it has been confirmed that it meets the required properties for securing beehives.
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Creation of laboratory exercises focused on measurement of basic parameters of telecommunication cables
Mlatec, Jan ; Látal, Michal (referee) ; Münster, Petr (advisor)
This bachelor thesis is focused on getting acquainted with the basic parameters of telecommunication lines. The laboratory is equipped measuring equipments used to measure. First, the individual cables were connected to the measuring instruments. This was followed by the launch of the devices and a detailed acquaintance with their functions. After obtaining the requisite knowledge of the device, a manual was prepared, which describes the working procedure for working with measuring equipments. The attachment which is a part of the thesis contain the model design of the individual laboratory tasks. Each of these exercises contains extensive theoretical introduction to solve problems and task assignment. First, the individual cables were connected to the measuring instruments. This was followed by the launch of the devices and a detailed acquaintance with their functions. After gaining the necessary knowledge about the device, an abbreviated manual was prepared, which describes the work procedure of measurement work, which is in the appendix to this work. Furthermore, a design of laboratory tasks for students was performed. This work contains a sample elaboration of individual laboratory tasks. The first task was created to measure the attenuation characteristics of coaxial cables. Students will learn how the attenuation of individual types of cables are different. The second task is to measure the frequency dependence of the impedance of coaxial cables. Students will again check the important characteristics of individual types of coaxial cables. The third task is to measure the parameters of UTP cables that will make students able to compare the properties with another type of cable.
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New trends in fibre optic sommunications
Lubajo, Lubajo Moses Wolyan ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
Přenos optickych vláken je jednou z hlavních metod přenosu informací pro přenos na velké vzdálenosti. Byly vyvinuty různé modulační formáty pro maximalizaci informací přenášenych prostřednictvím komunikačního kanálu. Takové formáty sahají od formátů, které přenášejí jeden bit na symbol (jako je například binární fázové posunování klíčů, BPSK), a nebo vice, jako je například Kvadraturní fázové posunovací klíčování, duální polarizační kvadraturní fázové řazení a mnoho dalších ostatní modulace. Cílem diplomové práce je vytvořit a implementovat přenosovy systém s rychlostí 100 Gbps pomocí modulace formátu DP QPSK. Vysledky jsou shrnuty s ohledem na to, co bylo úspěšně implementováno, a zlepšení, která mohou byt ještě učiněna pro zvyšení přenosové vzdálenosti a snížení BER mimo jiné. Použitysimulační software je PHOTOSS.
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Critical infrastructure protection using distributed temperature sensing
Holcman, Jiří ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
This master thesis aims to show the possibility of practical use of an optical fiber as a distributed temperature sensor. The main goal is the possibility of protection of waste pipes (critical infrastructure) against leaks, fluid leaks, line disturbances, fires, freezing, etc. The first part describes the basic elements of the system for distributed temperature measurement using optical fiber such as optical fiber sensor, block diagram involvement and theoretical basis on which the measurement is based. The physical principle of temperature sensing using an optical fiber using Raman backscattering of light is explained, as well as Rayleigh and Brillouin scatterings, which, however, are not used in this thesis. Furthermore, the main advantages of DTS systems are presented, such as the possibility of detection over long distances, almost maintenance-free operation with a long service life and easy installation in practice. Next, some global DTS manufactures of equipment for the implementation of these distributed temperature measurement systems. To verify the main parameters, a reference measurement was designed and implemented. In the next part of the work is assembled a simple DTS system simulating the practical implementation of pipelines in laboratory conditions. The possibilities of measured quantities such as sensitivity to temperature changes, resolution and measurement accuracy were verified on this system. All these values were recorded, graphically represented and evaluated. The investigated quantities were clearly marked and described on the graphs of the results. At the end of the work, the results of measurements were clearly summarized and the possibilities of practical use for the protection of critical infrastructures were indicated.
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Use of the plane of polarization of light propagation for high-speed optical fiber transmission
Šimák, Petr ; Münster, Petr (referee) ; Filka, Miloslav (advisor)
Thesis deals with the use of polarization planes in light propagation for high-speed optical fiber transport. It also deals with the issue of polarized light, its mathematical description using Stokes and Jones vectors and representation using the Poincare sphere. We explain how can light be polarized. It also describes the transmission of information via optical fiber and polarization mode dispersion. At the end of the thesis we describe a design of optical networks for the use of two polarization planes as separate transmission channels.
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Laboratory exercise - EDFA amplifier
Mahút, Michal ; Münster, Petr (referee) ; Dejdar, Petr (advisor)
The bachelor thesis is describing in detail a scheme of an EDFA optical amplifier consisting of appropriate components, insertion of the device and software deployment. The whole thesis is divided into several categories. First theoretical analysis of optical-fiber cables that describes the types of optical-fiber cables, limiting phenomena affecting signal transmission in optical fibers, wave multiplexing and optical amplifiers. The implementation of the connection was built on the Red Pitaya platform, which controls the control of the MOT350_35100GC laser pump. The software controlling the EDFA amplifier was created in the LabView development environment. The appropriate connection of the pump source and the choice of the length of the erbium fiber to achieve the highest possible gain of reinforcement was verified experimentally. Part of the bachelor's thesis is a laboratory task, acquainting the solver with the problem of optical amplifiers with measurement of gain for various configurations of pump source, erbium fiber and pump power.
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Optical fibre sensors
Gallo, Martin ; Šifta, Radim (referee) ; Münster, Petr (advisor)
The aim of this thesis is to examine in detail the possibility of fiber as optical sensor. This work deals with optical fiber sensors, their distribution and use. Describes the most renowned types, their advantages and disadvantages. At the beginning of this thesis there is an introduction to optical fibers, description of well-known linear and nonlinear phenomena occurring in them, development of optical sensors. Sensors are cleraly divided by usage and common attributes. The paper focuses on distributed optical fiber sensors and includes two different designs of these sensors there are also basic principles in designing distributed sensors. At the end of the work, the sensor using Brillouin scattering measuring vibration is simulated in the simulation program. Viewed transmitted signal spectra are shown and conclusions of results are drawn.
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Design of optical access networks
Nguyen, Filip ; Horváth, Tomáš (referee) ; Münster, Petr (advisor)
The aim of this paper is to outline the problems of the design of optical access networks. In the first Rasta work is generally described problems optickcýh GPON network GEPON. The second part deals with the optical network elements, such as HDPE ducts, fiber optic cables, optical splitters and the like. The third part is devoted to legislative operation of electronic communications, especially the work is focused on the rights and obligations of providers elektronickcýh communications. It is also in this part of the studied issues of territorial management in the design of optical access networks. In the last part was designed optical network, for which the development of model documentation to obtain zoning and accompanying technical report, including drawings. The proposed network was prepared in the lab of optical networks and were made to her measurements CD, PMD, OTDR measurement and direct method.
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Simulation and measurement of dispersions in optical access networks
Kováč, Filip ; Münster, Petr (referee) ; Šifta, Radim (advisor)
Thesis deals with detailed description of the chromatic dispersion–CD and polarization mode dispersion–PMD. In theoretical part is dismantled at the beginning of words and mathematical principles of dispersion, further distribution of dispersion in terms of single-mode and multi-mode optic fibers through compensation, either fibers (chromatic dispersion) or systems (polarization mode dispersion). Theoretical part also consult the standard ITU-T specifically in term of fibers G.652, G.653, G.655, G.656, G.657, are described and compared. The penultimate section deals with major subject and by measuring both of the above dispersions. Finally, the theoretical part is devoted to optical access networks, which describes the optical access network such as its division and at the end describes the different types networks as APON/BPON, GPON, EPON, 10GEPON and XG-PON. The practical part is divided into measurement dispersions (EXFO FTB-5700) and simulation dispersions (OptSim). Both steps use the same type and length of fiber (6 km G.653, 20, 60 km G.652). According before creating the measured and simulation diagrams are obtained fibres parameters, which are finally compared.
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Simulation and measurement of triple play services in FTTx networks
Horváth, Tomáš ; Münster, Petr (referee) ; Šifta, Radim (advisor)
The aim of this thesis was to ascertain with the measurement methods of passive optical networks and the creation of a simulation model that corresponds to the measured network and comparison of results. The first chapter deals with Triple Play services, which are focused on different services (transmission of television signals, voice and data transmission). Each service consists of a subchapter and presents a detailed description of the parameters associated with the transmission. The second chapter of the theoretical part consists of an analysis of passive optical networks according to termination method of FTTx optical fiber. Partial part of this chapter consists of description of standard passive optical networks APON, BPON, GPON and EPON. The EPON standard is explained in detail. The theoretical part of the thesis is concluded with a description of active elements that will form the laboratory measured network. Testing of designed passive optical network is performed in the practical part of the thesis. The measurement is divided into two chapters. The first chapter consist of measuring of the „inanimate network“, as there are missing active elements in the nominated net. Network measurements were done by a direct measuring method and reflectometric method. The second chapter of the practical part consists of measuring the parameters of quality of service (QoS). This chapter is divided into subchapters, such as: the measurement using RFC 2544 standard, the measurement using ITU-T standard Y.156 (EtherSam) and bit error rate testing (BERT). The practical part ends with a designed simulation network model, which was proposed in OptSim 5.2. The aim of the simulation model was to maximally resemble a real network, due to result comparison.
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