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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1031

Využití kovové aditivní technologie při výrobě oběžného axiálního kola turbínového motoru pomocné energetické jednotky / Application of Metal Additive Technology in Production of a Blisk for Turbine Engine of a Auxiliary Power Unit

Robl, Jan January 2020 (has links)
The thesis deals with the possible use of additive technology in the production of strong thermally exposed components of turbine engines. The first part of the thesis is dedicated to the issue of processing heat-resistant materials by SLM method, introduction of conventional production of selected part and outline of currently used progressive methods in precision casting technology. These theoretical findings are further applied in the practical part of the thesis, which deals with the analysis of mechanical properties of cast and printed material IN 939. Experimental part also includes production of the blisk of the first stage turbine of the auxiliary power unit S5L by SLM additive technology. The thesis also includes analysis of fracture surfaces and metallographic analysis of samples using light and scanning electron microscopy. The thesis ends with the evaluation of the achieved results.
1032

Zavedení metodiky měření pomocí technologie 3D skenování do strojírenské výroby / Introduction of measurement methodology using 3D scanning technology into mechanical production

Klein, Adam January 2020 (has links)
This thesis focuses on comparison of the commonly used method of tactile measurement with 3D scanning methods for their introduction into engineering production. The first part summarizes the current state with the description of measurement technologies with emphasis on 3D technologies and their versatile use. The second part presents a practical comparison of three types of measuring devices on a selected component of a bicycle. After numerical and graphical evaluation of the measurement results, these values are further statistically processed and the measurement uncertainties are calculated. The final part of the work evaluates the whole process and presents practical suggestions, options and recommendations.
1033

NÁVRH AUTOMATICKÉ PIPETOVACÍ HLAVY NA PRINCIPU PERISTALTICKÉHO ČERPADLA / DESIGN OF AUTOMATIC PIPETTING HEAD ON THE PRINCIPLE OF PERISTALTIC PUMP

Čížek, Petr January 2021 (has links)
The aim of this diploma thesis is to design and create a prototype of automatic pipetting head that will be useful for pipetting in laboratories after attaching it to a robotic manipulator. In the beginning, a research about various types of automatic pipetting heads was made followed by a device design and component analysis. The prototype was made using 3D printing method and it utilises a peristaltic pump, Arduino microcontroller and Bluetooth interface. A measurement of repeatability and dispensing accuracy was made on the finished device. The results are evaluated in the conclusion.
1034

Posouzení softwaru Smap3D při návrhu odpařovací technologie / Evaluation of Smap3D software as a tool for design of evaporation system

Odstrčil, Marek January 2021 (has links)
The main goal of the master thesis is an evaluation of a software package Smap 3D Plant Design in design of evaporation technology, specifically 3D of the pipeline network and its subsequent documentation. The thesis describes evaporation technology in general, then the evaporator testing site in Laboratory of Energy Intensive Processes in NETME Centre is presented, where pipeline network needs to be designed. In the next part a reference 3D model was created as well as a documentation using SolidWorks routing. Subsequently, an equivalent 3D model was created using Smap 3D Plant Design – Piping and a documentation was created using Smap 3D Plant Design – Isometric. Finally, these two methods of creating pipeline were compared to each other, and recommended method was chosen.
1035

3D tisk kovů robotem / 3D metal printing by robot

Tvrdoň, Radek January 2021 (has links)
The diploma thesis presents an overview of additive production technologies and a summary of technologies used for 3D metal printing using a robot. All of them are generally described and at the same time assigned to their specific commercial use, or the academic research that deals with them. The work examines the suitability of the material EN ISO 14341-A: G 3Si1 for 3D printing, for which a modification of the Col Metal Transfer technology, Cycle Step is used. The experimental printout of the sample is evaluated on the basis of surface and mechanical tests. Capillary test, examination of microstructure a macrostructure, tensile test and microhardness test. All of them were satisfactory and the suitability of the welding wire for 3D printing was confirmed by the given technology.
1036

Jednostupňová převodovka vyrobená 3D tiskem / A single-speed gearbox made by 3D printing

Hykolli, Denis January 2021 (has links)
The aim of these theses was the creation of a single-stage gearbox by additive technology FDM / FFF. By chosen values was made dimension calculation for gears. The 3D model of the gearbox was designed in 3D software Autodesk Inventor. Single parts were produced on an FDM 3D printer by Prusa Research. Manufacturing programs for parts were prepared in PrusaSlicer. These programs were used for producing individuals parts on 3D Printer. Transparent material and printing parameters for the top of the gearbox were chosen by visual test and test of light intensity. The total cost of model production is calculated in the work. The result of these is a completely working model of a single-stage gearbox with a transparent top of the gearbox.
1037

Depth Estimation Using Adaptive Bins via Global Attention at High Resolution

Bhat, Shariq 21 April 2021 (has links)
We address the problem of estimating a high quality dense depth map from a single RGB input image. We start out with a baseline encoder-decoder convolutional neural network architecture and pose the question of how the global processing of information can help improve overall depth estimation. To this end, we propose a transformer-based architecture block that divides the depth range into bins whose center value is estimated adaptively per image. The final depth values are estimated as linear combinations of the bin centers. We call our new building block AdaBins. Our results show a decisive improvement over the state-of-the-art on several popular depth datasets across all metrics. We also validate the effectiveness of the proposed block with an ablation study.
1038

Laserový proximitní skener - mechanika / Laser Proximity Scanner - Mechanics

Kočí, Martin January 2009 (has links)
This thesis deals with possibility use ordinary optical distance sensor as a 3D laser proximity scanner. The thesis is aimed at design mechanical part of scanner for shifting laser beam in two axes. In the scanner is applied indirect shifting of the beam by a mirror. Next is described test control circuit, which has a controlling of direction of beam shifting and data acquisition for task. The control circuit is based on microcontroller ATmega48 with controlling program. On the end of thesis are shown results of measuring reached with designed scanner.
1039

Zpracování dat pro 3D / 3D data processing

Babinec, Tomáš January 2009 (has links)
The thesis falls within the field of computer vision. It describes the development of the software environment for 3D data processing. The thesis deals with the design of C++ classes suitable for scene description and representation of bonding conditions between scenes elements. There is also discussed the solution of camera calibration, geometric distortion identification and 3D coordinates reconstruction. The solving of these tasks is augmented with planarity and linearity conditions, which support projection equations and augment the computational ability of the environment.
1040

Moderní pouzdření a 3D systémy / Advancing Packiging and 3D systems

Nicák, Michal January 2009 (has links)
This project consists of three parts. The first part is aimed to summarize list of actual packaging systems and especially systems using 3D construction. Project continues in the second part, which is more practical and contains design and production of organic and inorganic testing substrates for lead-free soldered 3D structures. Last experimental part is about tests performed on soldered substrates and evaluation of results of these practical tests.

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