Auto-phasing synchronization for pulsed electronic article surveillance systems
US6812843B2 · kind B2 · utility
6Cited by
8References
10Claims
0Family size
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Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/26
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Automatic phase adjustment of a pulsed electronic article surveillance transmitter is provided. Amplitude sampling of a received signal is used to detect the leading edge of a interfering transmit pulse and a corresponding delay is calculated for synchronizing the instant transmitter to the interfering transmitter. Detection of EAS tags placed too close to the EAS transmitter interrogation zone is also provided. An alarm can be implemented to indicate detected EAS tags that are placed too close to the interrogation zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.