• Optics and Precision Engineering
  • Vol. 31, Issue 4, 450 (2023)
Ming GUO1,2,3,4, Huihui QI1, Kecai GUO5,*, Yuquan ZHOU1, and Dengke LI1
Author Affiliations
  • 1School of Geomatics and Urban Spatial Informatics, Beijing University of Civil Engineering and Architecture, Beijing0266, China
  • 2Engineering Research Centre of Representative Building and Architectural Heritage Database, Ministry of Education, Beijing100044, China
  • 3Key Laboratory of Modern Urban Surveying and Mapping, National Administration of Surveying Mapping and Geoinformation, Beijing100044, China
  • 4Beijing Key Laboratory for Architectural Heritage Fine Reconstruction & Health Monitoring, Beijing University of Civil Engineering and Architecture, Beijing1000, China
  • 5Beijing Shenxindacheng Technology Co., Beijing102444, China
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    DOI: 10.37188/OPE.20233104.0450 Cite this Article
    Ming GUO, Huihui QI, Kecai GUO, Yuquan ZHOU, Dengke LI. Ground-based LiDAR measurement system integrating BeiDou/GNSS positioning and 5G communication[J]. Optics and Precision Engineering, 2023, 31(4): 450 Copy Citation Text show less

    Abstract

    In response to the difficulties of processing laser point cloud off-site real-time scanning and on-site absolute coordinate system alignment, a low-cost ground-based LiDAR measurement system is developed by combining the BeiDou/GNSS positioning system and 5G communication technology. The developed measurement system is integrated by LiDAR, a high-precision motor, BeiDou/GNSS receiver module, and a 5G module. LiDAR collects point cloud information, the high-precision motor acquires angle information, BeiDou/GNSS receiver module receives the time, the high-precision motor acquires time stamps using a self-developed time synchronization module, and LiDAR obtains the point cloud and angle file with time tag before transmitting in real-time via 5G communication technology. The terminal performs spatial and temporal alignment of multi-frame point clouds by linear interpolation algorithm through self-developed data pre-processing software, coarse alignment of the multi-station laser point clouds based on BeiDou/GNSS coordinates outdoors, coarse alignment of the multi-station point clouds by single-station feature points in an indoor environment without BeiDou/GNSS, fine alignment using the proximity iteration algorithm to complete overall alignment, and visualization on the self-developed real-time point cloud management and visualization system. The experimental results show that the measurement system achieves real-time off-site scanning and transmission at a transmission rate of 50 Mbit/s by using 5G communication technology. The error of the aligned point cloud is less than 3 mm, which can provide digital infrastructure for real-time applications such as digital twin, monitoring of material and cultural heritage, analysis of construction and operation, and maintenance of large buildings.
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    V=At-L(6)

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    V=ΔX-X0-RX(7)

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    Ming GUO, Huihui QI, Kecai GUO, Yuquan ZHOU, Dengke LI. Ground-based LiDAR measurement system integrating BeiDou/GNSS positioning and 5G communication[J]. Optics and Precision Engineering, 2023, 31(4): 450
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