High accuracy inspection
The granules are continuously fed into a hopper and distributed in a uniform thin layer onto two vibrating conveyor feeders. Each conveyor has a set of six Point Grey Flea3 1.3 MP GigE Vision cameras continuously inspecting the granules for defects. The cameras are controlled by three Matrox 4Sight industrial computers each equipped with a Matrox Solios capture card. Each 4Sight system has four cameras connected and are able to simultaneously capture and analyze each image in real time (i.e., within the frame rate of the cameras at 30 frames/second).
Robert Jones Managing Director at JPS Imaging explains, "The Matrox products were selected because of the high performance offered by the 4Sight and Solios configuration." JPS also received valuable technical support and integration assistance from ClearView Imaging, Matrox Imaging’s UK distributor. Simultaneous, real time capture and analysis is performed on images of 1280 x 960 pixels and typical defect sizes are 0.25mm x 0.25mm. The images are processed using the Matrox Imaging Library (MIL)
image processing, measurement and blob analysis modules. The inspection system can detect fibers and hairs down to 0.1mm by 2mm long, black particles (e.g. insect parts, and plastics and solids) down to 0.2mm by 0.2mm, and bright or dark metallics down to 0.3mm by 0.3mm. High intensity OPT LED bar illuminators provide even illumination across the width of the vibratory conveyor feeder. Any defects that are detected are automatically ejected via a slider mechanism.