Bulletin of Surveying and Mapping ›› 2023, Vol. 0 ›› Issue (8): 84-90.doi: 10.13474/j.cnki.11-2246.2023.0237

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Research on LiDAR Positioning method of fusion descriptor and particle filter when GNSS loss of lock

LI Ang1, ZHONG Ruofei1, LIU Zhengjun2, XIE Donghai1, WU Wei3, ZHANG Yan1   

  1. 1. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China;
    2. Chinese Academy of Surveying & Mapping, Beijing 100039, China;
    3. Tsinghua University, School of Vehicle and Mobility, Beijing 100084, China
  • Received:2022-11-28 Published:2023-09-01

Abstract: When GNSS loses lock, how to locate based on 3D LiDAR is a problem worthy of attention. Positioning by point cloud matching or Monte Carlo method has the problems of sensitivity to initial value, long calculation time and large search space. This paper proposes a two-step localization method, which first uses descriptor initialization, determines the rough pose, narrows the search space, and then uses Monte Carlo for fine localization. The use of descriptors in the method gives the initial value, reduces the search space, and pre-computes the three-dimensional grid probability, which reduces the computation time. Preliminary experimental results show that the positioning accuracy remains good in the case of GNSS loss of lock.

Key words: LiDAR, descriptor, Monte Carlo localization, GNSS loss of lock

CLC Number: