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Auflistung nach Schlagwort "Surveying instruments"

Anzeige der Dokumente 1-13 von 13

The benefit of 3D laser scanning technology in the generation and calibration of FEM models for health assessment of concrete structures

Yang, Hao; Xu, Xiangyang; Neumann, Ingo (Basel : MDPI AG, 2014)

Terrestrial laser scanning technology (TLS) is a new technique for quickly getting three-dimensional information. In this paper we research the health assessment of concrete structures with a Finite Element Method (FEM) ...
Comparison of target-and mutual informaton based calibration of terrestrial laser scanner and digital camera for deformation monitoring

Omidalizarandi, Mohammad; Neumann, Ingo (Göttingen : Copernicus GmbH, 2015)

In the current state-of-the-art, geodetic deformation analysis of natural and artificial objects (e.g. dams, bridges,.) is an ongoing research in both static and kinematic mode and has received considerable interest by ...
Deformation analysis using B-spline surface with correlated terrestrial laser scanner observations-a bridge under load

Kermarrec, Gaël; Kargoll, Boris; Alkhatib, Hamza (Basel : MDPI AG, 2020)

The choice of an appropriate metric is mandatory to perform deformation analysis between two point clouds (PC)-the distance has to be trustworthy and, simultaneously, robust against measurement noise, which may be correlated ...
Finite element analysis based on a parametric model by approximating point clouds

Xu, Wei; Neumann, Ingo (Basel : MDPI AG, 2020)

Simplified models are widely applied in finite element computations regarding mechanical and structural problems. However, the simplified model sometimes causes many deviations in the finite element analysis (FEA) of ...
A framework based on reference data with superordinate accuracy for the quality analysis of terrestrial laser scanning-based multi-sensor-systems

Stenz, Ulrich; Hartmann, Jens; Paffenholz, Jens-André; Neumann, Ingo (Basel : MDPI AG, 2017)

Terrestrial laser scanning (TLS) is an efficient solution to collect large-scale data. The efficiency can be increased by combining TLS with additional sensors in a TLS-based multi-sensorsystem (MSS). The uncertainty of ...
How significant are differences obtained by neglecting correlations when testing for deformation: A real case study using bootstrapping with terrestrial laser scanner observations approximated by b-spline surfaces

Kermarrec, Gaël; Paffenholz, Jens-André; Alkhatib, Hamza (Basel : MDPI AG, 2019)

B-spline surfaces possess attractive properties such as a high degree of continuity or the local support of their basis functions. One of the major applications of B-spline surfaces in engineering geodesy is the least-square ...
Model selection for parametric surfaces approximating 3d point clouds for deformation analysis

Zhao, Xin; Kargoll, Boris; Omidalizarandi, Mohammad; Xu, Xiangyang; Alkhatib, Hamza (Basel : MDPI AG, 2018)

Deformation monitoring of structures is a common application and one of the major tasks of engineering surveying. Terrestrial laser scanning (TLS) has become a popular method for detecting deformations due to high precision ...
On the sensitivity of the parameters of the intensity-based stochastic model for terrestrial laser scanner. Case study: B-spline approximation

Kermarrec, Gael; Alkhatib, Hamza; Neumann, Ingo (Basel : MDPI AG, 2018)

For a trustworthy least-squares (LS) solution, a good description of the stochastic properties of the measurements is indispensable. For a terrestrial laser scanner (TLS), the range variance can be described by a power law ...
Optimisation of the calibration process of a k-tls based multi-sensor-system by genetic algorithms

Hartmann, J.; Von Gösseln, I.; Schild, N.; Dorndorf, A.; Paffenholz, J.-A.; Neumann, I. (Göttingen : Copernicus GmbH, 2019)

In recent years, the requirements in the industrial production of elongated objects, e.g., aircraft, have been increased. An essential aspect of the production process is the 3D object detection as well as the qualitative ...
Point-based and model-based geolocation analysis of airborne laser scanning data

Sefercik, Umut Gunes; Buyuksalih, Gurcan; Jacobsen, Karsten; Alkan, Mehmet (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)

Airborne laser scanning (ALS) is one of the most effective remote sensing technologies providing precise three-dimensional (3-D) dense point clouds. A large-size ALS digital surface model (DSM) covering the whole Istanbul ...
Terrestrial laser scanning technology for deformation monitoring and surface modeling of arch structures

Yang, Hao; Omidalizarandi, Mohammad; Xu, Xiangyang; Neumann, Ingo (London : Elsevier Ltd., 2017)

Terrestrial laser scanning (TLS) is capable to be a reliable deformation monitoring device with high-precision for concrete composite structures. Measurements based on TLS for an arch structure with monotonic loading is ...
TLS-based composite structure deformation analysis validated with laser tracker

Xu, Xiangyang; Bureick, Johannes; Yang, Hao; Neumann, Ingo (Amsterdam : Elsevier, 2017)

This paper focuses on the adjustment of B-spline approximation to terrestrial laser scanning (TLS) data and its contribution to deformation analysis of composite arched structures. The deformation of an arch structure under ...
TLS-Based Feature Extraction and 3D Modeling for Arch Structures

Xu, X.; Zhao, X.; Yang, H.; Neumann, I. (New York, N.Y. : Hindawi Limited, 2017)

Terrestrial laser scanning (TLS) technology is one of the most efficient and accurate tools for 3D measurement which can reveal surface-based characteristics of objects with the aid of computer vision and programming. Thus, ...

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Auflistung nach Schlagwort "Surveying instruments"

Auflistung nach Schlagwort "Surveying instruments"

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