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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.
11

Výpočet aerodynamiky závodního automobilu / Computation of race car aerodynamics

Vančura, Jan January 2008 (has links)
The main subject of this diploma thesis is computation of race car aerodynamics. It describes composition method of CFD model with utilization of 3D scanner ATOS and CAD software Pro Engineer. During creating this diploma thesis were found influences of additional aerodynamics components of racing car on globally axle loads.
12

Využití reverzního inženýrství pro výpočty aerodynamiky automobilu / The utilization of reverse engineering in computation of vehicle aerodynamics

Rozsíval, Jan January 2008 (has links)
The vehicle body was measured by using ATOS 3D scanner. Measured data from the ATOS 3D scanner were applied to make a 3D model of vehicle body and to make a 3D model of whole vehicle by using computer program Pro/ENGINEER. The model of vehicle was made with a view for future use of CAD model. Surface of the vehicle model was used for computation of vehicle aerodynamics – aerodynamic static pressure distribution by using CFD software Star-CCM+.
13

Analýza modálních vlastností lopatkové řady s lopatkami svázanými Z-vazbou / Modal Analysis of the Blades Row Tied with Z-tie

Valoušek, Tomáš January 2014 (has links)
This thesis is about modal analysis of the rotor blades row tied with Z-tie. Thesis was solved by finite element system ANSYS. Cyclic symmetry was used in this thesis with the aim of obtain eigen frequency of bladed disc. The next aim of this thesis was to find eigen frequency of the free rotor blades and to compare it with frequency obtained from experiment. 3D model was created by 3D scanner and CAD system CATIA.
14

Měření tvaru zatížené pneumatiky / Shape Measurement of Loaded Tyre

Hlavatý, Jiří January 2015 (has links)
This thesis is focused on measuring the shape of loaded tire and finding dependencies between inner tire pressure, load and the influence of these parameters on the resulting shape of the tire. Data for these dependencies were obtained by using a constructed measuring stand and 3D optical technology. Found dependencies describe the change in shape of the tire in specific mathematical functions, and served the creation of a parametric model of the tire. The main finding of this thesis is that the tire is actually behaves according to dependencies described by varying degrees of polynomial function.
15

Nástroje pro tvorbu prezentací / Tools for Presentations Creation

Ptašek, Martin January 2010 (has links)
This document describes resources for creating an advanced presentation. Advanced parts include virtual three-dimensional scene,  three-dimensional objects and video. Describes and summarizes selected technologies and possibilities of using them. Document  also includes concept of  presentation and its implementation realized by suitable resources. The platform Flash has been chosen for creating  in operating system Windows.
16

Accuracy and reliability analysis of timber measurement and scaling using harvesters

Ollila, Ilari Esanpoika January 2017 (has links)
At the start of millennia harvesters in forestry have gained popularity for their productive and accurate timber processing. However the accuracy of harvester measurement and overall reliability is often in question and hot topic in forest technology as it is directly responsible for economical profits of the machine. As harvesters timber measurement is affected by various factors both internally and externally the influence level of these factors needed practical approach. In the view of this aim of this analysis was directed to discover the factors and characteristics that are essential to harvesters timber measurement. Target of this analysis is divided in to practical field measurements and harvester simulator experiments. In the field measurements small number of trees were measured with various measurement methods which are used in the professional field of forestry. For harvester simulator experiments number parameters in the computer system were chosen that are linked to timber measurement and modified based on their individual characteristics. Results for both field measurements and harvester simulator experiments were processed and analyzed to see which had the most essential effect on the measurement accuracy and reliability and what other discoveries it might produce. Field measurement data analysis discovered that 3D scanner and image analysis produced the most accurate measurement results and harvester underestimated the tree volume data in most of the assortments. Other notion was that image analysis over measured some tree stem bases that had over expanded butt part. Simulator parameter experimentation led to the discovery that price type and diameter base curve had the most influence on the timber volume estimation while other experimented parameters produced less data change after their modification. Also some parameter were restricted by other parameters from producing any possible discoveries.
17

Plataforma de aquisição e método de análise corporal por varredura tridimensional

China, Rodrigo Teiske January 2017 (has links)
Orientador: Prof. Dr. Mario Alexandre Gazziro / Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Ciência da Computação, 2017. / Devido à disseminação de novas tecnologias de varredura (ou escaneamento) 3D, há agora a possibilidade de se realizar uma análise corporal a partir de um modelo tridimensional do paciente. Este trabalho visa criar uma plataforma de avaliação corporal semiautomática para medição de ângulos e distâncias de pontos anatômicos do corpo, juntamente com aplicações que somente informações 3D podem agregar, como a medição do volume do corpo e perímetros de seções corporais, criando-se assim um equipamento completo conhecido como scanner 3D multifuncional. Este equipamento foi construído utilizando 2 sensores Microsoft Kinect aliados à biblioteca de reconstrução ReconstructMe, uma plataforma giratória e um microcontrolador Arduino, criando uma plataforma de escaneamento e software de uso fácil e intuitivo. A plataforma desenvolvida foi utilizada em testes de análise postural de um manequim segundo o protocolo SAPO de avaliação e comparada ao software SAPO. O método de aquisição de modelos tridimensionais foi totalmente automatizado e se mostrou confiável, desde que o usuário permaneça parado durante o processo. O software para avaliações corporais, nomeado AllBodyScan3D, conseguiu reproduzir os métodos propostos e realizar uma avaliação postural de forma ainda não vista em outros trabalhos. A comparação de resultados de avaliação postural do software proposto com o software SAPO mostrou boa correspondência entre os métodos. / Due to the spread of new 3D scanning technologies, there is now the possibility of performing a body analysis from a three-dimensional model of the patient. This work aims to create a semiautomatic body evaluation platform for measuring angles and distances of anatomical points of the body, together with applications that only 3D information can aggregate, such as the measurement of body volume and perimeters of body sections, thus creating a complete equipment known as multifunctional 3D scanner. This equipment was built using 2 Microsoft Kinect sensors together with the ReconstructMe reconstruction library, a turntable and an Arduino microcontroller, creating a scanning platform and an intuitive and easy-to-use software. The developed platform was used in postural analysis tests of a mannequin following the SAPO evaluation protocol and compared to the SAPO software. The method of acquisition of three-dimensional models was fully automated and proved to be reliable, provided that the user remains still during the process. The body evaluation software, named AllBodyScan3D, was able to reproduce the proposed methods and perform a postural evaluation in ways not yet seen in other works. The comparison of postural evaluation results of the proposed software with the SAPO software showed a good match between the methods.
18

Sensorialidad en instrumentos musicales prehispánicos de la cultura Tumaco del suroccidente colombiano / Sensorialidade nos instrumentos musicais pré-hispânicos da cultura Tumaco do sudoeste colombiano / Sensoriality in pre-hispanic musical instruments of Tumaco culture for colombian southwest

Pinzón Pérez, Nelson Javier 21 February 2017 (has links)
Organização Interamericana de Direitos Humanos - OEA / A interpretação antropológica de instrumentos musicais e do fato cultural que fornece sua fabricação e uso, é relevante para a compreensão da música em sua dimensão simbólica, estética e sensorial. A criação de um instrumento sonoro, permite mostra a importância harmônica e melódica, que produz o instrumento musical, além de estabelecer o contato entre a comunidade pré-hispânica e a paisagem sonora o qual é percebido pelos sentidos. A música na cultura Tumaco, constitue a mostra de um grande grupo das técnicas oleiras para a fabricação de instrumentos musicais, se vislumbrando uma criação útil e simbólica para aqueles artefatos em as sociedades navegantes do Litoral Pacífico Colombiano entre o 300 A.C 300 D.C. Finalmente se escolheram um 23 peças, entre instrumentos e representações musicais, ampliando o âmbito ilustrativo dos artefatos, mostrando o corpo geral externo do instrumento musical; adicionalmente se fizeram provas sonoras de 9 instrumentos musicais, em ótimo estado de conservação, considerando uma percepção visual e sonora contemporânea da sonoridade préhispânica. / La interpretación antropológica de instrumentos musicales y del hecho cultural que propicia su fabricación y uso, es pertinente para la comprensión de la música en su dimensión simbólica, estética y sensorial. La creación de un instrumento sonoro, permite evidenciar la importancia armónica y melódica que produce el instrumento musical, además de establecer el contacto entre la comunidad prehispánica y el entorno sonoro el cual percibe mediante los sentidos. La música en la cultura Tumaco, constituye la evidencia de un gran manejo de las técnicas alfareras para la fabricación de instrumentos musicales, vislumbrándose una creación productiva y simbólica para este tipo de artefactos en sociedades navegantes del Litoral Pacífico Colombiano entre el 300 A.C – 300 D.C. Finalmente se seleccionaron un número de piezas ubicadas en el Museo del oro de Bogotá, de las cuales se realizaron tomas 3D, con scanner Eva Artec 3D de 24 piezas entre instrumentos y representaciones musicales, ampliado el ámbito ilustrativo de las piezas, mostrando el cuerpo general externo de la pieza musical; adicionalmente, se efectuaron pruebas sonoras de 9 instrumentos musicales, en excelente estado de conservación, considerando una perspectiva visual y sonora contemporánea de la sonoridad prehispánica. / Anthropological interpretation of musical instruments and the cultural facts promote their manufacture and use, it's relevant for understand musical, symbolic, aesthetic and sensory dimension. The creation of a sonourus instrument, allow highlight the importance of melodic and harmonic production of musical instrument, on top show the contact between the Pre-Hispanic population and sonourus environment that is perceived by the senses. Music on the Tumaco culture, constitutes evidence of a great technical pottery for the manufacture of musical instruments, glimpse a create production and symbolic for this type of artifacts on the Colombian Pacific coast on sailing communities between 300 BC - 300 AC. Finally was chosen a number of pieces in the Museo del Oro of Bogota of which were took 3D captures with scanner Eva Artec 3D, testing on 24 pieces between instruments and musical representations, broading the illustrative field of the pieces, showing the general body of music artifact. Additionally, it's does tests 9 musical instruments, in excellent conditions, consider a contemporary sound and visual perspective of Pre-Hispanic sound.
19

3D skener pro výukové účely / 3D scanner for educational purposes

Romanovský, Jiří January 2017 (has links)
This diploma thesis deals with the design of a 3D optical scanner using the structured light projection method. The aim of this thesis is to demonstrate the principles and processes of 3D scanning by using the DLP LightCrafter projector and the ImagingSource camera. The individual stages of the measurement process will be implemented to the Matlab software environment to describe the various principles and methods which can be used for digitizing the objects.
20

Korekce barev 3D scanneru a 3D tiskárny / Color Correction for 3D scanner and 3D printer

Kratochvíla, Michael January 2019 (has links)
This thesis deals with color correction of a chain that starts with the 3D Artec MHT scanner, and ends with the 3D printers (CJP – Color Jet Printing technology). In principle, it is necessary to control the color interpretation of the entire chain from the scanning of real models to the 3D print model. With color properties and their color shade, including color textures. The principle of model surface scanning using a 3D scanner is in the same principle as photo camera which scans using a conventional CMOS chip. For this reason, color palettes were scanned using the photo camera and the resulting digital data were analyzed by the Darktable software. This analysis consisted of comparing the scanned color shades of the surface with the spectrofotometer measured data. The main goal of this method was to achieve color precision in the digital data during their acquirement, adjustment and interpretation. Then the same principle was applied to the data acquired by the 3D scanner to create an ICC profile of the 3D scanner. Because the 3D printer (CJP – Color Jet Printing) uses the same principle as the 2D printer, the 2D printing device calibration principle was used again to calibrate it. There have been defined procedures that adjust the color shade to the spectrophotometrically correct shades of the resulting print on a 3D printer. Color swatches were also printed for print quality verification. It has been found that with photo camera, which was used for objective measurement in the L*a*b* coordinates of independent space, any color setting and their adjustment is very sensitive to even small imprecisions. It has been found that it is not easy to obtain accurate colors within the Detla E

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