4.7 Article

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

Journal

REMOTE SENSING
Volume 13, Issue 12, Pages -

Publisher

MDPI
DOI: 10.3390/rs13122263

Keywords

cylindrical steel structure; point clouds; piecewise cylinder fitting model; standard deviation; structure deformation

Funding

  1. Natural Science Foundation of Zhejiang Province of China [LQ20D010001]
  2. Research Project of Science and Technology Commission of Shanghai [19DZ1202400]
  3. Jiaxing Science and Technology Project [2019AY11017]

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The study presents a piecewise cylinder fitting method to calculate the relative inclination of a cylindrical steel structure and verifies its accuracy and effectiveness through real data, indicating high application value in the field of structure deformation monitoring.
As fundamental load-bearing parts, the cylindrical steel structures of transmission towers relate to the stability of the main structures in terms of topological relation and performance. Therefore, the periodic monitoring of a cylindrical steel structure is necessary to maintain the safety and stability of existing structures in energy transmission. Most studies on deformation analysis are still focused on the process of identifying discrepancies in the state of a structure by observing it at different times, yet relative deformation analysis based on the data acquired in single time has not been investigated effectively. In this study, the piecewise cylinder fitting method is presented to fit the point clouds collected at a single time to compute the relative inclination of a cylindrical steel structure. The standard deviation is adopted as a measure to evaluate the degree of structure deformation. Meanwhile, the inclination rate of each section is compared with the conventional method on the basis of the piecewise cylinder fitting parameters. The validity and accuracy of the algorithm are verified by real transmission tower point cloud data. Experimental results show that the piecewise cylinder fitting algorithm proposed in this research can meet the accuracy requirements of cylindrical steel structure deformation analysis and has high application value in the field of structure deformation monitoring.

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