Method and system for reducing effect of interference in integrated metal detection/electronic article surveillance systems
US8659428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2010 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Jul 29, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An integrated electronic article surveillance (“EAS”)/metal detection system. The system includes a transmitter operable to transmit an EAS interrogation signal, where the EAS interrogation signal establishes an interrogation zone and is used to detect EAS markers and metal objects within the interrogation zone. The EAS interrogation signal is transmitted at a first frequency during an EAS detection cycle and at a second frequency during a metal detection cycle. The system includes a receiver operable to detect a signal received from an EAS marker, and a metal detector module operable to detect a metal object in proximity to the integrated EAS/metal detection system, where the metal detector module includes a filter tuned to substantially filter out the first transmission frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.