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Wyszukujesz frazę "engineering photogrammetry" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Application of reverse engineering for identification of damage and support the reparation of the vehicles
Autorzy:
Karczewski, M.
Walentynowicz, J.
Polak, F.
Powiązania:
https://bibliotekanauki.pl/articles/245789.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
motor vehicle
reverse engineering
photogrammetry
3D scanner
Opis:
The methodology of the vehicle damage identification was presented in this article. Presented method used reverse engineering methodology for compare the shape of new vehicle, including CAD models of vehicle, and change of vehicle shape after damage. The method is based on three-dimensional scanning technology and photogrammetry. Identification of the defect is divided into two areas: the accurate reproduction of the vehicle surface damage and measure only changes of the base point’s position. In a first method, scanning large areas of vehicle requires connection of the consecutive scanning images of the surface to an object stuck in a random reference points. They form a grid of completing successive scanning images with very high accuracy of the surface point’s position. Measuring the angle and length between reference points, scanned surface is measured and digitized by software. However, do not always have to make as accurate measurements. In the second method there is measured only position of the vehicle base points. They may be dispersed very rare so if a damage is very small position of base points does not change. Sometimes it is reasonable to use the first and the second method together. For this purpose, the photogrammetric system is used in the first stage of the scanning surface. The vehicle specific places that are so-called base points are equipped with appropriate measuring adapters. Taking pictures of the object from these points programmatically determine the distance between reference points. This paper presents a method of surface scanning and processing on digital image scans of the vehicle for the calculation of standard deviations between the surface and the reference points. Presented adapters are used for measurement of base point’s position. Examples of calculations results of base point’s location in multi-wheeled AMV vehicle are described and illustrated in the paper.
Źródło:
Journal of KONES; 2013, 20, 4; 155-161
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D scanner working parameters : influence on an accuracy of mechanical vehicle element reproduction
Autorzy:
Karczewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/241566.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
3D scanning
strain identification
photogrammetry
reverse engineering
skanowanie 3D
fotogrametria
inżynieria wsteczna
Opis:
In recent years, the reconstruction based on existing physical objects, plays an increasingly important role in research and everyday life. With the advancement of modern industry, more and more often, including automotive industry, modelling and deformation techniques of objects, based on reverse engineering, are used. One of such example is the reproduction of the geometry of motor vehicles using 3D scans. Damages of motor vehicles, cause local changes in the shape of the product and their size and character are directly related to the occurred reaction. However, to assess the damage extent and qualify the object for further repair, it is necessary thoroughly to know the condition of the object after the damage to select the appropriate technology and repair method. This is the case for reverse engineering, and 3D scanning using structural light. The aim of the study was to evaluate the influence of the parameters of the 3D scanner on the accuracy of reconstructing the geometry of the selected vehicle element – the rear door of the Skoda Octavia in two variants, non-deformed and deformed. The dimensions of door exceeded the range of the largest measuring area of used 3D scanner, so it was necessary to use the photogrammetric technique in order to generate a point model of the object that was used to compose the individual scans. Measurements were made with different measuring areas: 1000 x 800 x 800 mm, 500 x 400 x 400 mm and 250 x 250 x 200 mm. For the base field, 500 x 400 x 400 mm, several measurements were repeated in order to determine repeatability.
Źródło:
Journal of KONES; 2018, 25, 1; 215-223
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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