A Dimensional Measurement Method Based on a Laser Tracker for a Crane Assembly
F-M. Zhang, X-H. Qu and G. Shi
A better working performance of large floating crane with full rotation depends significantly on relative position and orientation between the wheels, the kingpin and the rail. Therefore a measurement method for positioning accurately relative position over large range is established to meet the assembly tolerance in this paper. First, parameters influenced on the assembly are defined. Second, measurement station layout is proposed based on laser tracker, to make sure all the point is acquired complete. Awkwardly, point coordinate processing is proposed, to avoid amplification of the angular error. The results show that the measurement method is most flexible, accurate, and fast, in order to assure the quality of crane is fine.
Keywords: Laser tracker, crane assembly, large-volume metrology, station placement, uncertainty