Patent ID: 7084989
Filing Date: 2006-08-01
Classification: G01B

Abstract:
1. Method for measuring the presence and/or position of an object placed on a carrier moving in a predetermined direction of movement in a distribution system, comprising the steps of: illuminating said object and said carrier with incident light by at least one light source; repeatedly measuring said object and said carrier by detecting reflected light from said object and said carrier when said carrier is moved in said direction of movement using at least one sensor, which is placed with a predetermined distance from said at least one light source; converting the detected light into electrical signals; obtaining a three-dimensional sub-image of said object and said carrier from each measurement of said object and said carrier using said electrical signals; obtaining a three-dimensional image of said object and said carrier from one or more of said obtained sub-images; and determining the presence and/or position of said object on said carrier from said three-dimensional image.