Radio frequency identification (RFID) tag location verification using acousto-magnetic detection
US11308780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2020 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Aug 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2462
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Example implementations include a method, apparatus, and computer-readable medium for electronic article surveillance (EAS), comprising transmitting concurrently, an acousto-magnetic (AM) interrogation signal into an AM interrogation zone of an EAS system, and a radio frequency identification (RFID) interrogation signal into an RFID interrogation zone of the EAS system, the AM interrogation zone and the RFID interrogation zone overlapping to form a zone of interest. The implementations further include indicating, by the EAS system, a presence of a first tag of the EAS system in the zone of interest upon a concurrent detection of both an RFID response signal of the first tag in response to the RFID interrogation signal and an AM response signal of the first tag in response to the AM interrogation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.