G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/194 (2006.01) A47F 10/04 (2006.01) G08B 13/14 (2006.01) G08B 21/00 (2006.01)
Patent
CA 2423205
An apparatus is provided for detecting a shopping cart used to bring items to a checkout location, and inspecting its bottom tray for the presence of items. The apparatus includes a cart-detector to detect the presence of the cart at a pre- determined location; and an item-detector to detect the presence of items placed on the lower tray of the cart. The cart detector includes an arrangement of three optical sensors and corresponding retro-reflective targets; and finite state-machine processing logic to discriminate a specific sequence of sensor responses. The item detector includes an optical line generator to project a structured illumination pattern on any items placed on the lower tray of the shopping cart as well as on the opposite wall of the checkout lane; an area-imaging sensor and associated optics and digitizing means to capture the reflected pattern in digital form; a pattern- analysis means to analyze the captured pattern; and a means for transmitting the result of the pattern analysis, for example, to a system that can alert the attendant and/or the customer, or to a means that prevents further progress of the car through the checkout lane.
Bennett Jones Llp
Verifeye Inc.
LandOfFree
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