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    Wyświetlanie 1-4 z 4
    Tytuł:
    Reliability of geodetic control measurements of high dams as a guarantee of safety of the construction and the natural environment
    Autorzy:
    Zaczek-Peplinska, J.
    Podawca, K.
    Karsznia, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/200942.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    terrestrial laser scanning
    technical control of dam
    environmental safety
    naziemne skanowanie laserowe
    kontrola techniczna zapór
    bezpieczeństwo ekologiczne
    Opis:
    In the safety assessment of hydro-technical objects, it is necessary to combine different measurement techniques, calculations and experience of specialists in various fields of engineering. That is possible due to the current development of surveying technology. Undoubtedly, the integration of measurements, including technical assessment as well as object behaviour modelling, makes it possible to perform more comprehensive assessment of objects. Nevertheless, in order to obtain a multidimensional overview of an examined object – especially water dam – it is necessary to know all the possible errors that appear along the “observer-instrument-object” path. In this paper, the authors intended to investigate the influence of atmospheric conditions on the results of geodetic deformation measurements and attempted to consider surface deformation analysis, which is part of obligatory inspections of hydro-technical objects. The study was based on the geometry assessment of the vent wall of Rożnów water dam located within the borders of the South-Polish Protected Landscape Area. The measurements took place in the years 2013‒2015 and were performed using Z + F Imager 5010 laser scanner equipped with an integrated thermal camera. Surveying results and analyses based on archival data and forecasts of atmospheric conditions at the location of the hydro-technical facility can be applied while elaborating the rules for a control date selection. The proper definition of a measurement cycle will make it possible to avoid errors of interpretation for those facilities important from the flood protection, recreation and nature perspectives.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 87-98
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Terrestrial laser scanning in monitoring of anthropogenic objects
    Autorzy:
    Zaczek-Peplinska, J.
    Kowalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/145300.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    obrazowanie termiczne
    geodezja inżynierska
    naziemne skanowanie laserowe
    terrestrial laser scanning
    assessment of the objects
    engineering geodesy
    intensity value correction
    thermal imaging
    Opis:
    The registered xyz coordinates in the form of a point cloud captured by terrestrial laser scanner and the intensity values (I) assigned to them make it possible to perform geometric and spectral analyses. Comparison of point clouds registered in different time periods requires conversion of the data to a common coordinate system and proper data selection is necessary. Factors like point distribution dependant on the distance between the scanner and the surveyed surface, angle of incidence, tasked scan’s density and intensity value have to be taken into consideration. A prerequisite for running a correct analysis of the obtained point clouds registered during periodic measurements using a laser scanner is the ability to determine the quality and accuracy of the analysed data. The article presents a concept of spectral data adjustment based on geometric analysis of a surface as well as examples of geometric analyses integrating geometric and physical data in one cloud of points: cloud point coordinates, recorded intensity values, and thermal images of an object. The experiments described here show multiple possibilities of usage of terrestrial laser scanning data and display the necessity of using multi-aspect and multi-source analyses in anthropogenic object monitoring. The article presents examples of multisource data analyses with regard to Intensity value correction due to the beam’s incidence angle. The measurements were performed using a Leica Nova MS50 scanning total station, Z+F Imager 5010 scanner and the integrated Z+F T-Cam thermal camera.
    Źródło:
    Geodesy and Cartography; 2017, 66, 2; 347-364
    2080-6736
    2300-2581
    Pojawia się w:
    Geodesy and Cartography
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring technical conditions of engineering structures using the terrestrial laser scanning technology
    Autorzy:
    Zaczek-Peplinska, J.
    Pasik, M.
    Adamek, A.
    Kołakowska, M.
    Łapiński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/106876.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    monitoring
    terrestrial laser scanning
    displacement
    monitorowanie
    skanowanie laserowe naziemne
    przemieszczenia
    Opis:
    The laser scanning technology offers quite new possibilities in the field of the existing monitoring of engineering structures. The basic advantage of the laser scanning technology is huge amount of measuring observations and practically complete geometric and spectral information about the measured structures, which may be required within the short time. In the context of detection of threatens related to deformations and displacements of building structures, the surface - quasi-continuous distribution of measuring points is one of the most important factors. which ensure the possibility to perform correct evaluation of safety conditions of investigated structures. The proposed technological solution offers a series of new possibilities and the resulting methodology of determination of deformations and displacements of various structures, will considerably increase the scope of possible works and analyses. This will also create the new segment of data, which will result in delivery of additional information concerning conditions of the structure to experts from various fields, such as, among others, civil engineering, construction or geotechnique, who monitor the given structure.
    Źródło:
    Reports on Geodesy and Geoinformatics; 2013, 95; 1-10
    2391-8365
    2391-8152
    Pojawia się w:
    Reports on Geodesy and Geoinformatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of large concrete object geometrical model based on terrestrial laser scanning
    Autorzy:
    Zaczek-Peplinska, J.
    Popielski, P.
    Kasprzak, A.
    Wójcik, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/106781.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    terrestrial laser scanning
    numerical modelling
    finite elements method
    technical control of dam
    geodetic inventory
    skanowanie laserowe naziemne
    modelowanie numeryczne
    metoda elementów skończonych
    kontrola techniczna tamy
    inwentaryzacja geodezyjna
    Opis:
    The paper presents control periodic measurements of movements and survey of concrete dam on Dunajec River in Rożnów, Poland. Topographical survey was conducted using laser scanning technique. The goal of survey was data collection and creation of a geometrical model. Acquired cross- and horizontal sections were utilised to create a numerical model of object behaviour at various load depending of changing level of water in reservoir. Modelling was accomplished using finite elements technique. During the project an assessment was conducted to terrestrial laser scanning techniques for such type of research of large hydrotechnical objects such as gravitational water dams. Developed model can be used to define deformations and displacement prognosis.
    Źródło:
    Reports on Geodesy and Geoinformatics; 2014, 97; 91-102
    2391-8365
    2391-8152
    Pojawia się w:
    Reports on Geodesy and Geoinformatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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