Electronic article surveillance system with metal detection capability and method therefor
US8704638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2009 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jul 30, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/248
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting metal using an electronic article surveillance (“EAS”) system. The EAS system includes a transmitter and a receiver. An EAS interrogation signal is transmitted to establish the interrogation zone. The EAS interrogation signal is used to detect EAS markers and metal objects within the interrogation zone. The EAS signal is received and a metal object present in the interrogation zone is detected during a metal detection cycle. The metal object is detected based upon perturbations in the received EAS interrogation signal. The metal detection cycle is periodically interspersed with at least one EAS detection cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.