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Automatic and Visual Processing Method of Non-Contact Monitoring for Circular Stormwater Sewage Tunnels Based on LiDAR Data

Author

Listed:
  • Xiongyao Xie

    (Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Mingrui Zhao

    (Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Jiamin He

    (Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

  • Biao Zhou

    (Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China)

Abstract

The application of Light Detection And Ranging (LiDAR) technology has become increasingly extensive in tunnel structure monitoring. The proposed processing method aims to carry out non-contact monitoring for circular stormwater sewage tunnels and provides an efficient workflow. This allows the automatic processing of raw point data and the acquisition of visualization results to analyze the health state of a tunnel within a short period of time. The proposed processing method employs a series of algorithms to extract the point cloud of a single tunnel segment without obvious noise by main three steps: axis acquisition, segment extraction, and denoising. The tunnel axis is extracted by fitting boundaries of the tunnel point cloud projection in the plane. With the guidance of the axis, the entire preprocessed tunnel point cloud is segmented by equal division to get a section of the tunnel point cloud which corresponds to a single tunnel segment. Then, the noise in every single point cloud segment is removed by clustering the algorithm twice, based on the distance and intensity. Finally, clean point clouds of tunnel segments are processed by an effective deformation extraction processor to determine the ovality and to get a three-dimensional visual deformation nephogram. The proposed method can significantly improve the efficiency of LiDAR data processing and extend the application of LiDAR technology in circular stormwater sewage tunnel monitoring.

Suggested Citation

  • Xiongyao Xie & Mingrui Zhao & Jiamin He & Biao Zhou, 2019. "Automatic and Visual Processing Method of Non-Contact Monitoring for Circular Stormwater Sewage Tunnels Based on LiDAR Data," Energies, MDPI, vol. 12(9), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1599-:d:226349
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    References listed on IDEAS

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