Inventory system using articles with RFID tags
First Claim
1. An RFID tag for use in an inventory control system wherein the inventory control system has at least one article return area for receiving articles which were removed from a storage area and which are to be returned to the storage area, the article return area including an interrogation zone and a collection area for holding returned articles, the returned articles passing through the zone and into the collection area as the articles are returned, wherein plural articles may be simultaneously placed in the zone, an interrogator for monitoring the zone for disturbances in the form of a response signal caused by the presence of one or more tags within the zone, the interrogator substantially simultaneously interrogating each article in the zone, the interrogator outputting an interrogator output signal for each tag detected in the zone, each interrogator output signal including the identification information stored in the integrated circuit of an interrogated tag;
- said interrogator being couplable to a database for receiving the interrogator output signals, the database including inventory data for articles monitored by the system, the received interrogator output signals being used to update the status data of each returned article, the tag comprising;
an antenna for use in detecting the presence of the article by receiving an interrogation signal and returning a response signal and an integrated circuit connected to the antenna for storing article identification information and for outputting the article identification information with the response signal upon interrogation of the tag.
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Accused Products
Abstract
An article inventory control system for articles, such as books, uses RFID tags attached to each article. Each tag has a unique identification or serial number for identifying the individual article. An inventory database tracks all of the tagged articles and maintains circulation status information for each article. Articles are checked out of the library using a patron self-checkout system. Checked out articles are returned to the library via patron self-check in devices. The shelves are periodically scanned with a mobile RFID scanner for updating inventory status.
396 Citations
14 Claims
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1. An RFID tag for use in an inventory control system wherein the inventory control system has at least one article return area for receiving articles which were removed from a storage area and which are to be returned to the storage area, the article return area including an interrogation zone and a collection area for holding returned articles, the returned articles passing through the zone and into the collection area as the articles are returned, wherein plural articles may be simultaneously placed in the zone, an interrogator for monitoring the zone for disturbances in the form of a response signal caused by the presence of one or more tags within the zone, the interrogator substantially simultaneously interrogating each article in the zone, the interrogator outputting an interrogator output signal for each tag detected in the zone, each interrogator output signal including the identification information stored in the integrated circuit of an interrogated tag;
- said interrogator being couplable to a database for receiving the interrogator output signals, the database including inventory data for articles monitored by the system, the received interrogator output signals being used to update the status data of each returned article, the tag comprising;
an antenna for use in detecting the presence of the article by receiving an interrogation signal and returning a response signal and an integrated circuit connected to the antenna for storing article identification information and for outputting the article identification information with the response signal upon interrogation of the tag. - View Dependent Claims (2, 3)
- said interrogator being couplable to a database for receiving the interrogator output signals, the database including inventory data for articles monitored by the system, the received interrogator output signals being used to update the status data of each returned article, the tag comprising;
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4. An RFID tag in an for use in an inventory control system wherein the inventory control system has at least one article return area for receiving articles which were removed from a storage area and which are to be returned to the storage area, the article return area including an interrogation zone and a collection area for holding returned articles, the returned articles passing through the zone and into the collection area as the articles are returned, wherein plural articles may be simultaneously placed in the zone, an interrogator for monitoring the zone for disturbances in the form of a response signal caused by the presence of one or more tags within the zone, the interrogator substantially simultaneously interrogating each article in the zone, the interrogator outputting an interrogator output signal for each tag detected in the zone, each interrogator output signal including the identification information stored in the integrated circuit of an interrogated tag;
- said interrogator being a couplable to a database for receiving the interrogator output signals, the database including inventory data for articles monitored by the system, the received interrogator output signals being used to update the status data of each returned article, the tag comprising;
an antenna for use in detecting the presence of the article by receiving an interrogation signal and returning a response signal;
a passive resonant circuit coupled to said antenna; and
a programmable memory capable of storing a unique identifier, said programmable memory being powered by the passive resonant circuit to output the unique identifier stored therein. - View Dependent Claims (5, 6, 7)
- said interrogator being a couplable to a database for receiving the interrogator output signals, the database including inventory data for articles monitored by the system, the received interrogator output signals being used to update the status data of each returned article, the tag comprising;
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8. A library monitoring system comprising:
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a number of borrowable articles, each article having a radio frequency tag mounted thereon, the radio frequency tag having a unique identification code;
a processor coupled to a database containing an indication of the location of each library article, and to a borrowed article return location exterior to a library location;
wherein the borrowed article return location comprises a receptacle into which the borrowed article may be inserted, the receptacle comprising an antenna which detects an insertion of a library article having a radio frequency tag mounted thereon;
the borrowed article returning location, in response to the insertion of a library article into the receptacle, detecting the identification code and sending the identification code corresponding to the returned library article to the processor, the processor, in response to the received identification code, updating the information on the database relating to the returned library article to indicate that the returned library article has been returned to the library. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification