RFID-based inventory monitoring systems and methods with self-adjusting operational parameters
View Patent ↗An inventory monitoring controller maintains information reflecting a current inventory of articles based on radio frequency identification (RFID) tag identifying information received from one or more RFID tag readers in the context of inventory polling operations. In an embodiment, the controller also adjusts an operational parameter (e.g., a missing article detection threshold or a variable polling parameter) based on an analysis of the RFID tag identifying information. For example, a variable polling parameter may be adjusted in response to an occurrence of a triggering event (e.g., an inventory change indicated by the RFID tag identifying information or an occurrence of a temporal event), and a missing article detection threshold may be adjusted based on historical information relating to the detection of (or failure to detect) a particular RFID tag.
1. A method comprising the steps of:
polling a plurality of RFID tags;
determining product attributes for items tagged with the plurality of RFID tags;
storing the product attributes in a historical database;
associating the product attributes with at least one other attribute;
scanning an item;
determining the scanned item's current location;
determining product information for the scanned item; and
using the determined associations, the product information, and the scanned item's current location for determining if the scanned item is misplaced based on strength of the determined associations, wherein the strength of an attribute association monotonically increases with the time period of the attribute association.
2. The method of claim 1 wherein the product attributes comprise attributes taken from the group consisting of manufacturer, color, sex of user, size, design, and type of product, and the at least one other attribute taken from the group consisting of attributes of another item, a particular area in the store, and a landmark in the store.
3. The method of claim 1 wherein the step of determining associations comprises the step of determining at least one of the following:
a certain manufacturer's items are located at a particular location;
a particular brand is always located near items of the same brand;
a certain manufacturer's items are always located near each other;
products for a particular sex are always located near each other.
4. The method of claim 1 further comprising the step of:
notifying a user that the scanned item is misplaced.
5. The method of claim 1 further comprising the step of:
suggesting a location or multiple locations for the misplaced item using past associations between items having similar attributes.
6. The method of claim 5 wherein the multiple locations are rank ordered by the strength of attribute association.
7. A method comprising the steps of:
scanning an item;
determining the scanned item's current location;
determining product information for the scanned item;
determining historical associations for the product information; and
using the determined historical associations, the product information, and the scanned item's current location for determining if the scanned item is misplaced based on strength of the determined associations, wherein the strength of an attribute association monotonically increases with the time period of the attribute association.
8. The method of claim 7 further comprising the step of:
notifying a user that the scanned item is misplaced.
9. The method of claim 8 further comprising the step of:
suggesting a location or multiple locations for the misplaced item using past associations between items having similar attributes.
10. The method of claim 9 wherein the multiple locations are rank ordered by strength of attribute association.
11. A system comprising:
an RFID scanner polling a plurality of RFID tags;
a controller determining product attributes for items tagged with the plurality of RFID tags, storing the product attributes in a historical database, and associating the product attributes with at least one other attribute; and
wherein the associations are utilized by the controller to determine if items are misplaced based on strength of the determined associations, wherein the strength of an attribute association monotonically increases with the time period of the attribute association.
12. The system of claim 11 wherein the product attributes comprise attributes taken from the group consisting of manufacturer, color, sex of user, size, design, and type of product, and the at least one other attribute taken from the group consisting of attributes of another item, a particular area in the store, and a landmark in the store.
13. The system of claim 11 wherein the controller determines associations by determining one of the following:
a certain manufacturer's items are located at a particular location;
a particular brand is always located near items of the same brand;
a certain manufacturer's items are always located near each other;
products for a particular sex are always located near each other.