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Wyszukujesz frazę "ground laser scanning" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Lidar and ground penetrating radar data in determining road surface conditions and geological characteristics of unstable soils
    Autorzy:
    Plichta, A.
    Piasecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/297854.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    road investment
    laser scanning
    geophysics
    ground penetrating radar
    Opis:
    Within the road investments the very important element determining repeatedly the success of the whole project is an adequate information about the characteristics of the site, its load capacity, stability and the possible impact of geological characteristics that may interfere with subsequent service life, not only for the road surface itself, but also for the surrounded objects. The surface is incessantly influenced by geological characteristics, determining its durability and functional usefulness. The main aim of this paper is to answer the question how by the usage of modern technics for obtaining data it is possible to find a link confirming the characteristics of land on which the specific road projects are supposed to be carried out, or where these projects have already been accomplished, concerning their requirements with high accuracy of location and also the stability and durability of the ground. This article makes also an attempt to answer not only the question how to identify the construction of road surface, but also how to locate underground cavities, created or influenced by the flow of water, or due to geological structures characterized as an inconsistent ground. The results were supported with geophysical researches using GPR method, and also data collected with laser scanners.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2017, 20(2); 111-129
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methodological and technological aspects of 3D modelling of historic memorials and statues in order to document and preserve objects of cultural heritage
    Autorzy:
    Kuzyk, Z.
    Fedir, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/100633.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
    Tematy:
    historic preservation
    preservation of cultural heritage objects
    monument
    geographic information systems
    ground laser scanning
    computer graphics
    rendering
    digital terrain model
    attribute database
    visualization
    generation
    3D modelling
    photo texture
    video archiving
    ochrona zabytków
    ochrona dziedzictwa kulturowego
    zabytek
    system informacji geograficznej
    laserowe skanowanie terenu
    grafika komputerowa
    projektowanie 3D
    cyfrowy model terenu
    renderowanie
    archiwizacja
    Opis:
    The article deals with the main aspects and contemporary methods in 3D modelling of historical memorial structures in order to preserve objects of cultural heritage. Results of experiments using various combinations of software and technology have been presented: geographic information systems, ground laser scanning and computer graphics programs for rendering. On the basis of comparison between these methods and technologies, conclusions have been drawn, and recommendations for their application in the field of heritage preservation have been given.
    Źródło:
    Geomatics, Landmanagement and Landscape; 2017, 4; 67-77
    2300-1496
    Pojawia się w:
    Geomatics, Landmanagement and Landscape
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of GPR and TLS data for the assessment of the bridge slab geometry and reinforcement
    Autorzy:
    Cafiso, S.
    Di Graziano, A.
    Goulias, D.
    Mangiameli, M.
    Mussumeci, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/230272.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    georadar
    skanowanie laserowe naziemne
    płyta mostowa
    geometria
    zbrojenie
    ground penetrating radar
    terrestrial laser scanning
    bridge slab
    geometry
    reinforcement
    Opis:
    This paper presents a suggested approach for forensic investigation of bridge decks in which Ground penetrating radar (GPR) consisting of two antennas is used to assess the current conditions. The methodology was tested on a bridge deck in central Sicily. The acquired data were analyzed for identifying the asphalt overlay thickness, concrete cover depth and deck thickness and location of the rebar reinforcement. In the proposed approach for assessing bridge deck conditions the GPR survey was complemented with (i) a site investigation on layer thicknesses for calibration/verification purposes of the GPR response and (ii) a Terrestrial Laser Scanning system (TLS) to verify the bridge design slab curvature. The study shows that this methodology has significant merits on accurately assessing such bridge deck components when bridge design records are non-existing, and by using non-invasive methods such as laser scanning and GPR. The great advantage provided by the TLS technique is the possibility to obtain a 3D output model of the scanned element with the accuracy of the best topographic instruments in order to complement GPR data surveys for bridge inspection.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 1; 297-308
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geometryzacja form zjawisk krasowych na podstawie badań metodą georadarową
    Geometrization of karst phenomena based on GPR research
    Autorzy:
    Ortyl, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2075956.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    metoda georadarowa
    kras
    wapienie
    jaskinia
    pustki
    modelowanie danych
    naziemne skanowanie laserowe
    ground penetrating radar
    GPR
    karst
    limestones
    cave
    voids
    finite differential time domain
    FDTD
    terrestrial laser scanning
    TLS
    Opis:
    Recognition of subsoil in areas threatened with discontinuous deformation associated with the existence of natural and mining voids can be implemented by various geophysical methods. The purpose of such research, apart from confirming the existence of voids, is to determine their spatial extent. This is not a simple issue, regardless of the geophysical method used. This paper discusses the possibilities of geometrization of karst phenomenon localization using the ground penetrating radar (GPR) method by the example of a karst cave as a natural void. The area of data acquisition is located on limestone formations with numerous karstforms. The study object is the main hall of the karst cave with a height of up to 3 m, located at a depth of 3 to 7 m below the surface. Such location and shape of the subsurface structure made it possible for the author to perform a wide range of research. Their original aspects are presented in this paper. The shape of the hall was obtained using terrestrial laser scanning (TLS). The GPR data were obtained employing the 250 MHz shielded antenna that was directly positioned using a robotized total station with the option of automatic target tracking. Thus, the GPR and geodetic data were immediately achieved in a uniform coordinate system. The accuracy of the data obtained in this way is discussed in this paper. The author’s original algorithm for processing of GPR data into a point cloud is presented. Based on the results obtained, it was possible to compare the GPR signal, which represents the shape of the cave hall, in relation to its image in the form of a point cloud from terrestrial laser scanning. A unique part of this paper is the selection of filtration procedures and their parameters in optimal GPR data processing, which were widely discussed and documented in a way beyond the standard filtration procedures. A significant contribution is the analysis that was carried out on the data obtained in the field and on the model data generated using the finite difference method. Modeling was carried out for two wave sources: exploding reflector and point. The presented methodology and discrimination between the actual shape of the cave, GPR field data and model data made it possible for the author to draw many conclusions related to the possibilities of shape geometrization of the subsurface voids determined by the GPR method.
    Źródło:
    Przegląd Geologiczny; 2019, 67, 4; 252--269
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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