Supermarket trolley return incentive system - verifies identity of trolley and issuing privilege ticket to user

摘要

The trolley reception area is entered via a corridor between two parallel walls (5,6) under a crossbar (7). Each trolley pushed into the corridor is scanned by infrared radiation through windows (35,35',36,36') in the two walls. The number of vertical bars in one side of the trolley is counted, and if this agrees with a number predetermined or stored in the installation, two gates (14) are unlocked electromagnetically and the ticket is delivered into a tray (11) at the level of the customer's hand.. By this system, fraud is prevented and any trolley inadvertently pushed into the gateway can be retrieved easily.