Displacement Estimation Error in Laser Scanning Monitoring of Retaining Structures Considering Roughness

Seo, Hyungjoon; Zhao, Yatong; Chen, Cheng

doi:10.3390/s21217370

Cited by 12 publications

(6 citation statements)

References 33 publications

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“…For further information about geometric features as surface variation refer to [16]. Additional research to detection of geometric primitives and differences in point clouds can be accessed in [17,18].…”

Section: Methods Including Spatial Localisationmentioning

confidence: 99%

BIM-centred building diagnoses as a decision support tool for maintenance and repair

Morgenstern¹,

Raupach²

2022

eJNDT

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Digitalization in the construction industry continues to advance and, together with the increasing dissemination and further development of hardware and software, is steadily opening up further opportunities for innovative ways of working. Building Information Modeling (BIM) is currently becoming the standard for new construction, but has not yet been optimized for use in existing buildings. Therefore, the Institute of Building Materials Research at RWTH Aachen University (ibac) is researching new methods and possibilities for BIM-based building preservation. In this paper, the vision of digitalized building preservation, the state of research so far and the planned further steps are presented. It highlights what information needs to be available in the BIM model for digitalized maintenance planning, and shows how this data can be implemented in a way that is machine-readable and suitable for automated evaluation. The goal is the digital availability and linking of all inspection results, so that various operations such as lifetime prognoses or calculation of concrete removal can be performed in the BIM model. The findings to date show that making BIM models usable beyond the planning and execution phase is an essential step for the digitalization of building maintenance and holds great potential for effective building diagnoses and efficient service life management.

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Section: Methods Including Spatial Localisationmentioning

confidence: 99%

BIM-centred building diagnoses as a decision support tool for maintenance and repair

Morgenstern¹,

Raupach²

2022

eJNDT

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“…Roughness of the point cloud refers to the standard error of the distance from the scattered points in the plane model. In this study, the kernel was used to estimate the 3D roughness [70]. Technically, a value is chosen as the radius of the kernel for the collection of neighborhood points, and the plane equation for the query point is derived using the least-squares method.…”

Section: Deformation Calculationmentioning

confidence: 99%

Rapid assessment of slope deformation in 3D point cloud considering feature-based simplification and deformed area extraction

He¹,

Zhou²,

Hu³

et al. 2023

Meas. Sci. Technol.

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Calculating deformation values and determining deformation areas are essential for slope monitoring and safety management. Recently, terrestrial laser scanning has been widely used for deformation monitoring owing to its speed and efficiency. However, handling a large amount of point cloud data to obtain the deformed area is still challenging. To evaluate slope deformation information rapidly, this study proposes a simplification algorithm for point cloud data based on multi-parameter feature preservation. The proposed method remains feature points (i.e., inflection points, edge points) and simplifies data with the octree structure. Additionally, a method based on cloud-to-mesh for displacement is conducted where the winding number is introduced for the signed function. Next, extract the deformed area over the level of detection by density-based spatial clustering of applications with noise clustering algorithm. To verify the reduction method, two types of slope field data are used for experiments; the results reveal that the proposed point cloud approach is superior to the conventional algorithms. Further, the highway slope in Mianyang is selected as a case study to validate the performance of the proposed method. The entire monitoring area is stable with a deformation of approximately 0.43 mm, and only four regions are deformed over the study period. When the mean displacement value is considered in different deformation regions, the minimum deformation is –82.02 mm, and the maximum deformation is 85.31 mm. Moreover, comparative experiments on deformation calculation are conducted and reveal the superior performance of the proposed method.

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“…Thus, to provide a reference for tunnels of different diameters, a relative distance resolution is defined here:

where

represents the distance resolution of the laser emitter,

denotes the radius of a circular tunnel, and

is the relative distance resolution. According to the authors’ investigation, the distance resolution of laser scanners varies from 0.1 mm to 1 cm [ 24 , 25 ], corresponding to the relative distance resolution of 3.3 × 10 −5 to 3.3 × 10 −3 . In this section, numerical tests were conducted for varying relative distance resolutions and angular resolutions.…”

Section: Parameter Analysis Of Measurement Accuracymentioning

confidence: 99%

Identification Method for Internal Forces of Segmental Tunnel Linings via the Combination of Laser Scanning and Hybrid Structural Analysis

Zhang

Karlovšek

Liu

2022

Sensors

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This paper provides a new solution to identify the internal forces of segmental tunnel linings by combining laser scanning and hybrid structural analysis. First, a hybrid structural analysis method for quantifying the internal forces based on displacement monitoring is established, which requires comprehensive displacement monitoring with high precision and a complete trace history. Motivated by the development of laser scanning, two remedial solutions are proposed for typically insufficient engineering conditions, i.e., lack of displacement developing process and poor accuracy of measurements, which is highlighted in this paper. Therefore, with the help of remedial solutions, the structural analysis is able to be adopted with the application of laser scanning. The tool for developing remedial solutions is the first-order theory of slender circular arches. Virtual tests, based on a calibrated finite element model, were performed to verify the feasibility of the presented hybrid analysis and remedial solutions. In addition, parametric analyses were conducted to study the error propagation from laser scanning to the results of hybrid analysis. The resolution and measurement noise of laser scanning were investigated and discussed. On this basis, advice on combining laser scanning and hybrid structural analysis is proposed. Finally, on-site application of the hybrid analysis on an actual tunnel is presented and discussed.

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Displacement Estimation Error in Laser Scanning Monitoring of Retaining Structures Considering Roughness

Cited by 12 publications

References 33 publications

BIM-centred building diagnoses as a decision support tool for maintenance and repair

BIM-centred building diagnoses as a decision support tool for maintenance and repair

Rapid assessment of slope deformation in 3D point cloud considering feature-based simplification and deformed area extraction

Identification Method for Internal Forces of Segmental Tunnel Linings via the Combination of Laser Scanning and Hybrid Structural Analysis

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