Monitoring device

Details Monitoring device Monitoring device

G - Physics

08

B

G08B 13/14 (2006.01) A47F 9/04 (2006.01) G01V 9/04 (1990.01)

Patent

CA 2125600

Abstract A supermarket trolley monitoring system is provided for detecting shopping items on a lower shelf of the trolley as the trolley moves through a check-out station. Three transmitter/receivers are provided. The first and third at level A respond to light reflected by a panel 36 on the side of the trolley. The system is turned on when the panel 36 passes the first transmitter/receiver and off when the panel 36 passes the second transmitter/receiver. The second transmitter/receiver is mounted above A and if any object is detected while the system is ON, by reflection of the beam from the object, a warning is provided to alert a check-out assistant and/or a shopper that an item is present on the lower trolley shelf which may not have been entered in a till.

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