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- Title
Research and Application of Non-contact Measurement Technology for Operational Railways Based on Airborne LiDAR.
- Authors
ZHENG Lunying; WANG Lei; LUO Jing
- Abstract
In response to the insufficient of the traditional "RTK+leveling"measurement method for retest of existing railway lines, such as high safety risks, slow measurement speed, and poor applicability of multisource data. This research proposed a non-contact measurement operation for existing railway lines based on "UAV+LiDAR". Under the control of flight speed, aerial photography altitude, ground base stations, and equipment pulse frequency, high-precision and high-density point cloud data could be obtained. At the same time, target points were set up along both sides of the existing line at a distance of 500 m. After point cloud aerial belt registration and target correction processing, the relative and absolute accuracy could be further improved. The research results indicate that the mean squared error of the existing line centerline plane and elevation as determined by the method, can reach 1.77 cm and 1.27 cm, respectively. The method enhances safety and flexibility by avoiding on-railway work, reduces field measurement labor, improves production efficiency, and offers extensive potential for point cloud data applications. It shows promising prospects for has good application prospects in railway capacity expansion and transformation.
- Subjects
AERIAL photography; LIDAR; POINT cloud; EARTH stations; CLOUD computing
- Publication
Railway Investigation & Surveying, 2024, Vol 50, Issue 4, p53
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202404100002