Tiered control architecture for material handling

G - Physics – 05 – B

Patent

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Details

G05B 19/418 (2006.01) B65G 47/52 (2006.01) B65G 47/84 (2006.01)

Patent

CA 2449963

A control architecture for material handling includes multiple tiers of controllers, such as three. The lowest-level controllers interact directly with sensors and actuators used in the material handling system, such as photo- eyes and motors used with conveyors. The lowest-level controllers receive higher level commands from one or more mid-level controllers. The mid-level controllers, in turn, receive still higher level commands and information from at least one upper level controller. Each mid and low level controller is designed to include sufficient intelligence to deal with many of the signals and messages it receives without having to forward those signals or messages to the next higher level controller and await instructions from that higher level controller. The system thus distributes intelligence amongst the controllers. The system is well-adapted for application to conveyor control systems.

L'invention concerne une architecture de commande étagée pour la manutention, comprenant plusieurs niveaux de commandes, par exemple trois niveaux. Les commandes du niveau le plus bas coopèrent directement avec des capteurs et des actionneurs utilisés dans le système de manutention, tels que des cellules optiques et des moteurs sur des convoyeurs. Ces commandes du niveau le plus bas reçoivent des ordres d'un niveau supérieur, à savoir d'une ou de plusieurs commandes de niveau intermédiaire, lesquelles reçoivent à leur tour des ordres et des informations d'un niveau encore plus élevé d'au moins une commande de niveau supérieur. La conception de chaque commande de niveau intermédiaire et inférieur est telle qu'elles contiennent suffisamment d'intelligence pour traiter un grand nombre de signaux et de messages qu'elles reçoivent, sans devoir les transmettre à la commande du niveau plus élevé et attendre les instructions de cette dernière. Ce système, qui répartit l'intelligence entre les commandes, est parfaitement adapté comme système de commande pour convoyeurs.

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