A New Approach for Cylindrical Steel Structure Deformation Monitoring by Dense Point Clouds

Jia, Dongfeng; Zhang, Weiping; Wang, Yuhao; Liu, Yanping

doi:10.3390/rs13122263

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…It is possible to use point clouds to determine displacement, curvature, spin, and so on. [4] Measuring with a terrestrial laser scanner (TLS) is faster than with a total station, but it takes longer to process the data. For further research, it's important to get rid of all (redundant points/data).…”

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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“…Terrestrial laser scanning (TLS) is a measurement technique that actively acquires high-precision threedimensional (3D) geometric information on the surface of an object [7,8]. Over the last few years, point cloud data obtained from TLS have been widely used in damage detection and deformation analysis of various types of buildings [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A study on the detection of bulging disease in ancient city walls based on fitted initial outer planes from 3D point cloud data

Feng

Hou

2023

Herit Sci

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Bulging is a common disease suffered by ancient city walls, especially clay brick walls. Bulging affects or even threatens the stability of outer structures of ancient city walls. Therefore, accurate identification of bulges is one of the urgent issues to be addressed in ancient city wall conservation. In this study, a novel method is proposed for detecting and identifying bulge information using point cloud data collected from the outer surface of an ancient city wall. The non-bulging points are identified in the sliced point cloud of a city wall, and then the initial plane of the city wall is fitted more accurately with the aid of spatial constraints. Finally, the bulging damage is identified and extracted by comparing the initial plane with the original point cloud. This method was applied to the project of ancient city wall conservation and was compared with other existing methods in effectiveness and accuracy. The results show that the proposed method can detect efficiently budging disease in ancient city walls for architectural heritage conservation.

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“…Thus, it cannot accurately delineate the pipeline cavity, and the resulting grid scattering and dispersion analysis is affected by artifacts that reduce the imaging accuracy. To avoid those unwanted effects, we use cylindrical coordinates to model submarine pipelines in ultrasonic testing, which are more suitable for discretizing grids, and thus ensure higher accuracy [45]. In particular, using cylindrical coordinates makes the subdivision grids suitable to accurately represent the submarine pipeline cavity structure [46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Ultrasonic Reverse-Time Migration Imaging of Submarine Pipeline Nondestructive Testing in Cylindrical Coordinates

Peng,

Cheng,

She

et al. 2023

JMSE

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Submarine pipelines are a safe and energy-efficient mode of gas transport. However, due to the complex manufacturing process and harsh operating environment, submarine pipelines are subject to fatigue cracks under long-term cyclic loading. A comprehensive and high-precision characterization strategy for submarine pipelines can effectively prevent potential safety hazards and have significant economic and social repercussions. As a matter of fact, pipeline defects cannot be reliably detected with current traditional 2D methods. On the other hand, in ultrasonic testing, cylindrical geometry increases the complexity of the 3D wave field in the submarine pipeline space and significantly influences the accuracy of the detection results. In this paper, we put forward a novel method for 3D ultrasonic image testing that is suitable for cylindrical coordinates. In order to accurately simulate the ultrasonic signal received from pipelines, we generalize the 3D staggered-grid finite-difference method from Cartesian coordinates to cylindrical ones and simulate the full wave field in the 3D pipeline space. Then, signal processing is performed on the ultrasound simulation records, and 3D reverse-time migration imaging of submarine pipeline defects can be effectively achieved using the reverse-time migration method and cross-correlation imaging conditions. The results obtained from simulations and real field data show that the proposed method provides high-quality 3D imaging of defects in pipelines, taking into account multiple scattering and mode conversion information at the bottom of the defects.

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A New Approach for Cylindrical Steel Structure Deformation Monitoring by Dense Point Clouds

Cited by 13 publications

References 25 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

A study on the detection of bulging disease in ancient city walls based on fitted initial outer planes from 3D point cloud data

Three-Dimensional Ultrasonic Reverse-Time Migration Imaging of Submarine Pipeline Nondestructive Testing in Cylindrical Coordinates

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