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Diagnosis of metallic materials
Buday, Matej ; Šedivá, Soňa (referee) ; Bejček, Ludvík (advisor)
This thesis deals with non-destructive testing (NDT). It Describes two basic thermographic methods, lock-in and pulse thermography. Different types of measurements using Fluke Ti55, points to the possibility of applying these methods in practice. Pulse thermography issue is a substantial part of this work, due to its good applicability. Also, it compares visual testing methods (VIS) and pulse thermography due to measurement with die-casting alloy AC-AlSi9Cu3 (Fe).
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Intelligent Control Methods in Automation of Process of Construction Machines Control
Vaverka, Michal ; Kopecký, Zdeněk (referee) ; Voštová, Věra (referee) ; Škopán, Miroslav (advisor)
This work deals with the possibility of use of intelligent methods in construction machines control. These methods are based on GPS in combination with using laser and ultrasonic technology. There is in detail described especially control by robotic total station and 3D control, which includes digital model of construction site. The new trends of control are especially applied on the vibratory rollers. There are taken into consideration: achievement of sufficient degree of compaction on the basis of on-line information about conditions of subsoil.
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Non-destructive testing of welds
Šaloun, Jan ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
This thesis describes non-destructive testing (NDT) of fusion welds of metals. There are five fundament methods of NDT discussed in the theoretical part – visual and magnetic particle inspection, ultrasonic, radiography and penetrant testing. Principles of methods, examining procedures and their evaluations are described. The methods are compared with each other. In the experimental part of the thesis two samples of welding joints were welded and tested by selected methods. To verify correctness of the indicated defects, metallographic samples were made. At the conclusion practical results are compared with theoretical statements.
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3D Scene Reconstruction from Images
Fuchsík, Ondřej ; Zahrádka, Jiří (referee) ; Španěl, Michal (advisor)
This bachelor thesis deals with scene reconstruction from images using RGB--D senzo Microsoft Kinect. The aim of the work is to create model of the room in form of points from scanned data, from witch is created plan of the interior. A large part of the work deals with the point cloud registration, thus existing methods and their descriptions. Further, a projection of points on a plane and detection of edges in the obtained image are discussed. The work experimentally examines the influence of recording and the recorded environment on results.
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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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Modern Maintenance Procedures for Airframe Inspections for General Aviation Category Aircraft
Koštial, Rostislav ; Petrásek, Miloslav (referee) ; Třetina, Karel (referee) ; Hlinka, Jiří (advisor)
Aircraft scheduled maintenance requirements are rapidly extending and developing due to rapid evolution of small aircraft. This evolution leads to implementation of until recently exclusively airliner class maintenance standards. In the field of general aviation and FAR 23/ EASA CS-23 especially, preventive maintenance based on part replacing or repairing is still dominant. DAMAGE TOLERANCE philosophy implementation into an aircraft design influences maintenance procedures, which are adjusted to older SAFE LIFE philosophy. Aircraft manufactures are developing new ways, how to integrate requirements of damage tolerance application into scheduled maintenance procedures. Huge airliner manufactures (FAR 25/ CS-25) are using the ATA MSG-3 intelligent maintenance approach based on inspection. This dissertation thesis develops intelligent scheduled maintenance methodology, utilizing ATA MSG-3 procedures, expert knowledge and Multiple Criteria Decision Analysis (MCDA).
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Eddy Current Probe Design and its Application on Aircraft Composite Structures
Boháčová, Marie ; Hájek, Karel (referee) ; Kopec, Bernard (referee) ; Mazal, Pavel (advisor)
This thesis deals with design of an eddy current transducer which enables non-destructive inspection of composite aircraft structures primarily carbon fiber reinforced plastic (CFRP) in areas of manufacture and maintenance. The design of the transducer is based on analytical-experimental approach and its electrical and mechanical parameters were optimized to ensure a good signal to noise ratio at the six composite samples. These samples contain artificial discontinuities in the form of various types of defects. These defects are simulating the various types of damage created in the aircraft structure, especially delamination or thickness changes of composite materials. The experimental measurements, data collection and non-destructive evaluation were performed during the period. The result of this work is functional eddy current probe, which is reliably able to detect some damage of the carbon composite structures to the depth of 3,9 mm.
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Information System Assessment and Proposal of ICT Modification
Stuchlíková, Tereza ; Vejmelka, Miloslav (referee) ; Koch, Miloš (advisor)
This diploma thesis deals with the evaluation of the process of performing non-destructive testing in the Nuclear energy division of the ČEZ, a. s. and the design of changes for this process and the information systems involved. The first part of the diploma thesis defines the basic terminology and the theoretical basis for further use. The second part includes an analysis of the current state of the process of performing non-destructive testing and the relevant systems that are involved in the process. The third part contains a proposal to improve the process of conducting non-destructive testing, further proposals, and economic evaluation of proposals
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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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Welding of steel austenitic
Šmarda, Vladimír ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This thesis deals with welding of austenitic steel, which used in pipelines for liquids in the Dukovany Nuclear Power Station, and suitable technology for welding of joints. Firstly, there is introduced the distinction between the types of stainless steel. Concerning the austenitic steel there are stated their features and defects during welding. Secondly, the bachelor thesis deals with commonly used welding method: MMA, MIG/MAG and TIG, which is most frequently used for weld joints in the Dukovany Nuclear Power Station. A part of the chapter is devoted to progressive TIG methods, such as: use of hot wire and orbital welding of pipelines. In the experimental part, there is solved a proposal for a method and a technique for weld joint between two chambers of tubular cooler. The dimension of the pipeline flange is according to DN 400. It is a butt weld in V-shape with permanent pad on the inside of the pipe, which is welded with TIG method. On the basis of the NDT verification test and also destructive testing, there was proved that the chosen method, technology and additional material were optimal. In the part of experiment evaluation, there were summarized all the results of the tests. Eventually, the suggested weld joint was recommended for realization.
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