Method and system for deactivating an acousto-magnetic label
US10978231B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Jun 11, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F38/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Aspects of the present disclosure include methods, apparatus, and systems for deactivating an AM tag including receiving a deactivation signal via a first inductive coil, storing electrical charges generated from the deactivation signal in a capacitor, and discharging the electrical charges through a second inductive coil, wherein: a first bias strip in the demagnetized state and a second bias strip cause a resonator to vibrate at a first resonant frequency corresponding to an activated state of the AM tag, the discharging magnetizes the first bias strip from a demagnetized state to a magnetized state, and the first bias strip in the magnetized state and the second bias strip cause the resonator to vibrate at a second resonant frequency different than the first resonant frequency, wherein the resonator vibrating at the second resonant frequency corresponds to a deactivated state of the AM tag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.