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Diagnostics of ceiling structures - possibilities of using GPR
Resl, Jaroslav ; Heřmánková, Věra (referee) ; Anton, Ondřej (advisor)
The thesis is focused on the overview of the diagnostic methods for engineering surveys. The distribution of ceiling structures according to various parameters is described. The theoretical part then provides an analysis of diagnostic methods for the ceiling structures in more detail. It includes a description of the operating principles of GPR. The practical part explains the construction and technical survey of ceiling structures using ground penetrating radar as well as measuring on a physical model. Practical measurement is focused on the use and limitations of the radar.
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Calculation of efficient dose rtg diagnostic irradiation
Bažantová, Lucie ; Drastich, Aleš (referee) ; Rozman, Jiří (advisor)
This bachelor thesis deals primarily with the theory of ionizing radiation and its interaction with matter. It deals particularly with x-radiation and the methods of its use in medicine. The thesis contains a description of the origin of the x-ray image and a description of the techniques of radiography and skiascopy. A list of quantities and units used in radiation physics and in radiation protection has been set out, with regard to assessing the risk involved in the interaction of x-radiation with an organism. In particular, the effective dose and the methods of evaluating this during medical irradiation have been set out. The main parts of the work are an overview of the software environment used in radiation physics and an example of the calculation of an effective dose for a concrete radiographic examination together with a detailed description of the method of calculation. At the end of the thesis there is a table of calculated values and an evaluation of them.
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Non-destructive inspection methods of aircraft selected parts
Kníř, Jakub ; Třetina, Karel (referee) ; Trefilová, Helena (advisor)
Non-destructive testing (NDT) is a broad scientific field. This bachelor thesis provides an insight into NDT’s methods. It can’t embrace the whole field in any case because it’s needed to have knowledge from variety of other scientific fields in order to understand NDT completely. This thesis outlines basic testing methods and their usage for particular components of aircrafts. The thesis also includes a list of Czech and European standards relevant to the topic.
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DESIGN OF NON-DESTRUCTIVE METHOD FOR TESTING OF STEEL FIBER REINFORCED CONCRETE
Komárková, Tereza ; Steinbauer,, Miloslav (referee) ; Maňas,, Pavel (referee) ; Anton, Ondřej (advisor)
The doctoral thesis deals with a non-destructive testing method (NDT) designed to evaluate the uniformity of distribution and determination of the concentration of steel fibres in steel fiber reinforced concrete (SFRC). At present, no non-destructive method is available in the field of diagnostics of building structures to assess the concentration and the homogeneity of SFRC. The Institute of Building Testing (SZK FAST BUT Brno) has several diagnostic devices, but their utility for the evaluation of selected parameters of SFRC has not proven during the research activity. This knowledge led to the design of a new measuring instrument in cooperation with the Institute of Theoretical and Experimental Electrical Engineering of the Faculty of Electrical Engineering and Communication (UTEE FEKT BUT in Brno) and the methodology for evaluation of these parameters. The proposed NDT method has been experimentally tested and verified for its utility for the evaluation of SFRC in building practice.
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Radiography image preprocessing tools
Chmelař, Petr ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
This thesis deals with design and realization of methods of preprocessing of X-ray images and its storage. In the first part of this thesis, there were designed and implemented methods for preprocessing of series of X-ray images such as averaging after image registration or merging of images to a HDR image using Debevec method. In the following part of the thesis, there was done a literary research of data formats based on which was implemented a library for x-ray images storage. Both implemented methods allow to reduce a random noise by merging a series of images. Application of the Debevec method also allow to increase a dynamic range of image.
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Modern Imaging Techniques in Medicine
Pařízek, Aleš ; Neuwirthová, Ludmila (referee) ; Rujbrová, Šárka (advisor)
Cílem této práce je popsat základní principy a fyzikální veličiny spjaté s jednotlivými zobrazovacími metodami a poté jednotlivé metody porovnat. Práce popisuje vznik rentgenového záření, jeho interakci s různými materiály a metody snímaní pro vytvoření obrazů. Dále se práce zabývá základním principem vytvoření 3D obrazů pomocí počítačové tomografie a jednotlivými generacemi tomografických strojů. V poslední části se práce věnuje principu nukleární magnetické resonance a základním parametrům pro vytvoření obrazů pomocí MRI systémů.
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Modern trends in radiographic procedures and methods in defectoscopy
Skřivánková, Vendula ; Vlašic, František (referee) ; Juliš, Martin (advisor)
Presented thesis deals with modern trends and techniques in radiographic methods of crack detection which are recently used in engineering practice. In the first part, conventional (analogue) radiography principles based on creating a visible image of tested object to radiographic film are discussed. The next part is aimed to the digital radiography and radioscopy. To digitize existing X-ray film images, application of storage phosphor plates (CR), flat panels (DR) and computed tomography (CT).
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Diagnostic methods for reinforced concrete bridges
Vaňková, Michaela ; Vítek, Lubomír (referee) ; Anton, Ondřej (advisor)
This bachelor thesis deals with the diagnostic survey of reinforced concrete bridges. In the introductory part is the bridge terminology, another part deals with methods of diagnosis,which can be applied to concrete bridges. Last chapter refers to the typical defects and disorders of reinforced concrete bridges. The practical part describes the technical survey of existing bridge and comparison methods determining the position of reinforcement - a radiometric method and using the GPR.
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The complex diagnostics of apartment building construction before reconstruction
Kocich, Tomáš ; Vítek,, Lubomír (referee) ; Hobst, Leonard (advisor)
This thesis deals with the diagnosis of a residential building from the late nineteen twenties for the needs of reconstruction. The methods generally used in the diagnosis of structures are briefly described in the theoretical part. More deeply this section describes the methods that were used during this particular research. The practical part deals with the diagnosis of the object itself. The first section describes the layout of the villa, its design solution, its faults and defects detected during the inspection. The next section deals with evaluating the current state of construction materials. Static reports of several structural parts were calculated in the last section.
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Laser-driven hard X-ray source for imaging applications
Lamač, Marcel ; Nejdl, Jaroslav (advisor)
With the advent of high-power lasers in recent decades, a unique source of hard X-ray radiation has become availible. This source of collimated, broadband, femtosecond, incoherent and hard X-ray radiation is produced when a focused laser with intensity above 10^18 W/cm^2 collides with a gas target. The strong electric field of the laser pulse ionizes the gas and interacts with the plasma generating a strong plasma wake wave. This space charge separation inside the target generates longitudal electric fields of the order of 100 GV/m. This resulting electrostatic wakefield accelerates the electrons to relativistic velocities and causes them to travel in oscillatory motion behind the laser pulse, producing hard and collimated X-ray radiation. This thesis is focused on a theoretical evaluation and an experimental design of this laser-plasma X-ray source. Furthermore, we consider the source's unique properties for novel imaging applications.
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