LAUSR

ABSTRACTInspection of stamped sheet metal parts can require CAD to inspection data comparison rates exceeding 1 million points per second. With current serial CPU algorithms, comparing the nominal CAD to the digitizer data can take several minutes. The thousands of cores available with Graphical Processing Units (GPUs) therefore offer an attractive alternative. This paper describes GPU accelerated algorithms and memory management optimization for both point-facet and facet-facet CAD to inspection point cloud data deviation colormap generation. Computation time reduction from over 4 minutes to 2 seconds – a speed-up of 124X – was achieved. In collaboration with an industry partner, the result is implemented as a practical Windows compatible DLL that can be deployed to the factory floor.