Identification and Visualization of the Full-Ring Deformation Characteristics of a Large Stormwater Sewage and Storage Tunnel Using Terrestrial Laser Scanning Technology

Zhang, Zixin; Yin, Tong; Huang, Xin; Zhang, Fan; Zhu, Yeting; Liu, Wei

doi:10.3390/en12071304

Cited by 9 publications

(3 citation statements)

References 41 publications

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“…[10] By comparing two point clouds, it is possible to detect structural changes in time. [6,7] Some studies used segmentation of raw point clouds to cut down on the amount of time it took to process. Point cloud is broken up into different shapes, like rotary rings, circular shells, and others.…”

Section: Rotary Kiln Controlsmentioning

confidence: 99%

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Zahradník,

Vynikal,

Pavelka

2023

Preprint

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The purpose of the investigation was to determine the relationship between rotary kiln liner loss and steel structure ovality. As measurement apparatus, a terrestrial laser scanner was used. The interior and exterior of the rotary kiln were measured. The primary focus object was inner-lining loss and the geometric characteristics of cylindrical shells. The research uncovered significant disparities in inner lining loss between sections. A correlation was found between ovality and elimination of inner lining. Due to the hypothesis of constant inner linig loss from the middle of the rotary kiln, the investigation found that the loss of brick lining was less than the value reported from the boreholes. The study offers significant information on maintenance and repair strategies for rotary kilns, which have the potential to increase their efficiency and useful life.

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Section: Rotary Kiln Controlsmentioning

confidence: 99%

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Zahradník,

Vynikal,

Pavelka

2023

Preprint

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“…TLS was applied for the measurement of defects on concrete surfaces in [23]. For the deformation measurement of objects, the TLS method was used in works [24][25][26]. TLS is also a proven method of collecting spatial data; it is used as a reference for verification of reliability for other methods [27].…”

Section: Introductionmentioning

confidence: 99%

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

et al. 2020

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This research focused on determining a rotary kiln’s geometric parameters in a non-traditional geodetic way—by deriving them from a survey realized by a terrestrial laser scanner (TLS). The point cloud obtained by TLS measurement was processed to derive the longitudinal axis of the RK. Subsequently, the carrier tires’ geometric parameters and shell of the RK during the shutdown were derived. Manual point cloud selection (segmentation) is the base method for removing unnecessary points. This method is slow but precise and controllable. The proposed analytical solution is based on calculating the distance from each point to the RK’s nominal axis (local radius). Iteration using a histogram function was repeatedly applied to detect points with the same or similar radiuses. The most numerous intervals of points were selected and stored in separate files. In the comparison, we present the conformity of analytically and manually obtained files and derived geometric values of the RK-radiuses’ spatial parameters and coordinates of the carrier tires’ centers. The horizontal (X and Y directions) and vertical (Z-direction) of root–mean–square deviation (RMSD) values are up to 2 mm. RMSD of the fitting of cylinders is also up to 2 mm. The center of the carrier tires defines the longitudinal axis of the RK. Analytical segmentation of the points was repeated on the remaining point cloud for the selection of the points on the outer shell of the RK. Deformation analysis of the shell of the RK was performed using a cylinder with a nominal radius. Manually and analytically processed point clouds were investigated and mutually compared. The calculated RMSD value is up to 2 mm. Parallel cuts situated perpendicularly to the axis of the RK were created. Analysis of ovality (flattening) of the shell was performed. Additionally, we also present the effect of gradually decreasing density (number) of points on the carrier tires for their center derivation.

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“…For further research, it is important to get rid of all (redundant points/data) [29]. By comparing two point clouds, it is possible to detect structural changes in time [30,31].…”

mentioning

confidence: 99%

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Zahradník,

Vynikal,

Pavelka

2023

Applied Sciences

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The article delves into the application of laser scanning within the realm of engineering, concentrating its examination on rotary kilns. Through an in-depth case study, this article meticulously assesses the advantages inherent in utilising laser scanning technology and draws comparisons with conventional measurement methods. The overarching objective of the investigation is to unravel the intricate relationship between the deterioration of the rotary kiln liners and the ovality of the underlying steel structure. By meticulously analysing these aspects, this article seeks to contribute valuable insights into the understanding of this complex interplay in the context of engineering practices. As a measurement apparatus, a terrestrial laser scanner was used. The interior and exterior of the rotary kiln were measured. The primary focus object was inner-lining loss and the geometric characteristics of the cylindrical shells. The research uncovered significant disparities in inner lining loss between the sections. A correlation was found between the ovality and elimination of the inner lining. Due to the hypothesis of constant inner lining loss in the middle of the rotary kiln, the investigation found that the loss of brick lining was less than the value reported from the wells. This study offers significant information on the maintenance and repair strategies for rotary kilns, which have the potential to increase their efficiency and useful life.

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Identification and Visualization of the Full-Ring Deformation Characteristics of a Large Stormwater Sewage and Storage Tunnel Using Terrestrial Laser Scanning Technology

Cited by 9 publications

References 41 publications

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

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