High-precision measurement of steel structure based on LiDAR and UAV

Synergy of LIDAR and hyperspectral remote sensing: health status assessment of architectural heritage based on normal cloud theory and variable weight theory

“…The acquisition of assessment index values is divided into two aspects: structural parameters and surface parameters. In terms of structural parameter extraction: the contactless feature of LiDAR is used to obtain point cloud data for the 3D reconstruction of ancient buildings, which provides detailed and accurate engineering data for structural assessment of damaged ancient architectural heritage and strengthens the ability to perceive the safety state of buildings [4][5][6][7][8]. However, this cannot determine the force condition of the structure under external forces, which means that the spatial data model alone is insufficient to support the structural analysis of architectural heritage.…”

Low-cost fixed-angle ground-based lidar integration with point cloud registration

“…Due to the increase in demand for assistance systems for the mass production of autonomous vehicles, the hardware used has evolved rapidly, and this portable lidar, which is compact, easy to place, and has a unique scanning method, has also developed rapidly, and this portable lidar belongs to the hybrid solid-state radar. According to the scanning method, LIDAR can be divided into three categories, which are mechanical, solid-state, and hybrid solid-state [1][2][3] , among which mechanical radars are more commonly used. The mechanical lidar transmitting and receiving systems rotate, turning the laser from point to line by rotating the transmitter, and arranging multiple laser transmitters in the vertical direction to form a surface to achieve the effect of 3D scanning, but the point cloud data obtained from such lidar scanning is linearly distributed [4] , the point cloud is sparse, and the point cloud density does not increase with scanning time [5] [6] .…”