Optical sensing of objects for control on moving conveyor

摘要

Objects that are moved continuously on a conveyor belt are passed across the field of view of a CCD line sensor. The sensor provides an output that is digitised and then is fed to an image processing system. The image processing system consists of a programmable circuit that identifies motion vectors for the objects. The objects, eg pencils (8), lie perpendicular to the CCD, sensor (7) and move across it. The contour of the objects are in the form of position and edge vectors that are stored in a memory and these characterise the geometry. The system has a microcontroller that controls the process.