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    Wyświetlanie 1-9 z 9
    Tytuł:
    Variability of roughness parameters calculated using data obtained by TLS depending on scan resolution and beams angle of incidence
    Autorzy:
    Zaczek-Peplinska, J.
    Kowalska, M. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/115761.pdf
    Data publikacji:
    2016
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    terrestrial laser scanning
    TLS
    roughness
    orthogonal regression
    Terrestrial Laser Scanning
    parametry chropowatości
    regresja ortogonalna
    Opis:
    Spatial data obtained by Terrestrial Laser Scanning (TLS) can be used in order to create various inventories and analyses of the surveyed surfaces. This paper presents a use of orthogonal regression line in order to identify the beam's incidence angle on the surveyed surface as well as identification of roughness parameters using data obtained by terrestrial laser scanning. Accuracy of the visualisation of the surface and roughness parameters, in particular Ra (mean arithmetic deviation of surface roughness profile forming the average line) are closely correlated to the scan resolution of the evaluated area. Presented analyses indicate a need to identify areas with uniform visualisation [1,2] in the compared scans.
    Źródło:
    Challenges of Modern Technology; 2016, 7, 1; 40-45
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of terrestrial laser scanner with an integrated thermal camera in non-destructive evaluation of concrete surface of hydrotechnical objects
    Autorzy:
    Kowalska, M.
    Zaczek-Peplinska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/178891.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    terrestrial laser scanning
    thermal camera
    concrete surface
    intensity
    Opis:
    The authors present possible applications of thermal data as an additional source of information on an object’s behaviour during the technical assessment of the condition of a concrete surface. For the study one of the most recent propositions introduced by Zoller + Fröhlich company was used, which is an integration of a thermal camera with a terrestrial laser scanner. This solution enables an acquisition of geometric and spectral data on the surveyed object and also provides information on the surface’s temperature in the selected points. A section of the dam’s downstream concrete wall was selected as the subject of the study for which a number of scans were carried out and a number of thermal images were taken at different times of the day. The obtained thermal data was confronted with the acquired spectral information for the specified points. This made it possible to carry out broader analysis of the surface and an inspection of the revealed fissure. The thermal analysis of said fissure indicated that the temperature changes within it are slower, which may affect the way the concrete works and may require further elaboration by the appropriate experts. Through the integration of a thermal camera with a terrestrial laser scanner one can not only analyse changes of temperature in the discretely selected points but on the whole surface as well. Moreover, it is also possible to accurately determine the range and the area of the change affecting the surface. The authors note the limitations of the presented solution like, inter alia, the resolution of the thermal camera.
    Źródło:
    Studia Geotechnica et Mechanica; 2017, 39, 4; 35-43
    0137-6365
    2083-831X
    Pojawia się w:
    Studia Geotechnica et Mechanica
    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:
    Terrestrial Laser Scanning in Monitoring Hydrotechnical Objects
    Autorzy:
    Zaczek-Peplinska, J.
    Kowalska, M. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/124612.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    terrestrial laser scanning (TLS)
    hydro-engineering
    concrete dam
    geodetic inventory
    Opis:
    Developing Terrestrial Laser Scanning technology is provided by modern measuring instruments, i.e. total stations and laser scanners. Owing to these instruments, periodic control measurements of concrete dams carried out as a part of geodetic surveying provide point models characterised by quasi-continuity. Basing on the results of these surveys, it is possible to conduct a number of geometric analyses, as well as to obtain information for detailed analytic and calculative deliberations. A scanner, similarly to a total station, determines spatial coordinates (X, Y, Z) of the surveyed points by identifying distances and angles. Registration of intensity of the reflected laser beam (Intensity) sent out by the scanner provides additional information on the surveyed object. Thanks to high working speed and a large amount of collected data, scanners have become an essential tool for a geodesist.This paper evaluates the possibility of applying Terrestrial Laser Scanning to test deformations and shifts of flagged points of concrete dam construction based on experimental measurements, including object inventory and evaluation of the dam’s concrete structure condition.
    Źródło:
    Journal of Ecological Engineering; 2016, 17, 4; 120-128
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inwentaryzacja galerii kontrolnej i przelewu zapory ziemnej Klimkówka metodą skanowania laserowego
    Inventory using laser scanning of the control gallery and overflow section of Klimkówka earthfill dam - experiences and conclusions
    Autorzy:
    Zaczek-Peplinska, J.
    Adamek, A.
    Osińska-Skotak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/131032.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Geodetów Polskich
    Tematy:
    skanowanie laserowe
    monitoring geodezyjny
    zapora ziemna
    terrestrial laser scanning
    geodetic monitoring
    earth dam
    Opis:
    W referacie opisano doświadczenia z inwentaryzacji geodezyjnej galerii kontrolnej zapory ziemnej Klimkówka. Przedstawiono obecny stan przepisów prawa narzucający na jednostki administrujące i użytkujące budowle hydrotechniczne obowiązek odpowiedniej ich kontroli technicznej. Skaning laserowy ze względu na brak opracowanej odpowiedniej metodyki pomiaru tego typu obiektów jest bardzo rzadko wykorzystywany do ich inwentaryzacji i kontroli. W sierpniu 2012 roku został wykonany przez pracowników i studentów Zakładu Geodezji Inżynieryjnej i Pomiarów Szczegółowych (PW, Wydział Geodezji i Kartografii) okresowy pomiar kontrolny przemieszczeń zapory wodnej Klimkówka metodą niwelacji precyzyjnej. W tym samym czasie wykonano inwentaryzację galerii kontrolnej tego obiektu metodą naziemnego skanowania laserowego. Dodatkowo w trakcie opracowywania danych podjęto próbę analizy zarejestrowanych wartości I (Intensity) przy pomiarze przelewów betonowych metodą automatycznej analizy obrazowej w celu klasyfikacji cech betonu – analiza ta ma posłużyć jako materiał wyjściowy do analizy zmian powierzchni betonowej w kolejnych latach. W referacie przedstawiono wyniki inwentaryzacji geometrii galerii kontrolnej oraz wstępną analizę powierzchni przelewu metodą klasyfikacji nienadzorowanej. W pracy opisano proces tworzenia modelu galerii oraz wybranych, możliwych do wykonania analiz i pomiarów na bazie danych z naziemnego skanowania laserowego.
    The paper discusses experiences resulting from the surveying inventory of Klimkówka earth dam’s control gallery. Current status of the law, which impose obligation of adequate technical control on the unit administering and operating hydraulic structures is presented. Laser scanning due to the lack of suitable developed measurements methodology for this type of objects is rarely used for its inventory and control. In August 2012, the measurement of displacements of control gallery of this object using precise levelling was conducted by the staff and the students from the Department of Engineering and Detailed Surveying (WUT, Faculty of Geodesy and Cartography) . Simultaneously, an inventory of control gallery using terrestrial laser scanning was made. In addition, during the processing the data an attempt to analyse the I values (Intensity) was made which were recorded during the measure of concrete overflow using automated image analysis in order to carry out the characteristic classification of the concrete - this analysis is to be used as a starting material for the analysis of changes in the surface of the concrete in the following years. The results of an inventory of geometry of the control gallery and a preliminary analysis of the surface of the concrete overflow using unsupervised classification method have been presented. The process of gallery model creation, as well as selected possible analyses and measurements based on the data from terrestrial laser scanning have been also described.
    Źródło:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2013, Spec.; 147-163
    2083-2214
    2391-9477
    Pojawia się w:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of point clouds captured with terrestrial laser scanners with different technical characteristic
    Autorzy:
    Zaczek-Peplinska, J.
    Kowalska, M. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/115439.pdf
    Data publikacji:
    2014
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    terrestrial laser scanning
    fitting plane
    least square method
    naziemne skanery laserowe
    płaszczyzny montażu
    metoda najmniejszych kwadratów
    Opis:
    Terrestrial Laser Scanners come with different technical parameters like the wavelength (laser colour), range or even the distance measuring method. Within this work the surface of a large-scale concrete – Rożnów Dam -structure was captured by three different Terrestrial Laser Scanners with different technical parameters - Leica C10, Riegl VZ -400 and the Z+F Imager 5010. The captured three dimensional point clouds were further evaluated by analysing the parameters of a fitted plane in each case that has been derived with the help of a least squares adjustment. This paper describes different analysis of registered point clouds. Presented results indicate significant differences between representations of scanned surface, measured in the same weather conditions, using three different scanner models. Analysis revealed differences in “grain” and texture of obtained visualization, as well as registered data completeness. These differences might play a significant role during conducting analysis of an engineering object changes and deformations based on point clouds registered in different time periods.
    Źródło:
    Challenges of Modern Technology; 2014, 5, 4; 39-43
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    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 1-9 z 9

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