THREE-DIMENSIONAL TOWERED CHECKERBOARD FOR MULTI-SENSOR CALIBRATION

    公开(公告)号:US20240134024A1

    公开(公告)日:2024-04-25

    申请号:US18403731

    申请日:2024-01-04

    发明人: Mingwu REN Dexin REN

    摘要: The disclosure is a three-dimensional towered checkerboard for multi-sensor calibration, and a LiDAR and camera joint calibration method based on the checkerboard. The joint calibration method includes: establishing a modeling coordinate system taking the three-dimensional towered checkerboard as a basis, and generating a point cloud of the three-dimensional towered checkerboard; denoising a three-dimensional point cloud obtained by LiDAR, and obtaining an actual point cloud of the three-dimensional towered checkerboard under a LiDAR coordinate system; determining a transformation relationship between the LiDAR coordinate system and the modeling coordinate system; generating a corner point set of two-dimensional checkerboards under the modeling coordinate system in sequence according to actual positions of corners of the two-dimensional checkerboards, and transforming into the LiDAR coordinate system; obtaining a corner point set of the two-dimensional checkerboards on a photo; and calculating a transformation relationship between the camera coordinate system and the LiDAR coordinate system.

    Radar data transceiver, ranging method, and lidar

    公开(公告)号:US11965953B2

    公开(公告)日:2024-04-23

    申请号:US17951183

    申请日:2022-09-23

    摘要: A radar data transceiver, a ranging method, and a LiDAR are provided. The transceiver includes: a synchronization module, configured to generate a synchronization signal and send the synchronization signal to an emission module and a receiving module separately; the emission module, connected with the synchronization module and configured to delay the synchronization signal according to a preset delay policy, generate a first emission signal, and emit the first emission signal; and the receiving module, connected with the synchronization module and configured to receive a reflected signal, generate a first histogram according to the reflected signal and the synchronization signal, and superimpose histograms obtained by n measurements to generate an echo signal.