The present application relates to the field of
laser measurement technology, and more particularly to a kind of steel rail piece geometric dimension intelligent measurement method based on
laser scanning.The present application includes the following steps: measurement preparation and
system calibration;
Laser scanning
data acquisition;
Point cloud data preprocessing;Geometric dimension intelligent calculation, based on the profile
feature extraction of rail head, rail
waist and rail bottom of each section profile
point cloud after
standardization;Measurement result output and storage.The present application constructs global reference axis of steel rail, converts local coordinates of each section to
global coordinate system and compensates
scanner attitude deviation, establishes continuity constraint of adjacent section profile feature parameters according to steel rail model, obtains optimal profile feature parameters through
global optimization, can stably extract profile features of rail head, rail
waist and rail bottom under unified reference, reduces the influence of attitude deviation and
point cloud noise, and realizes reliable calculation of geometric dimension of steel rail section, full-length straightness and twist degree
form error.