Systems and methods for providing a tag with a miniature zero power motion detector and energy harvester
AssigneeSensormatic Electronics Corporation
InventorsCraig E. Trivelpiece, Steve E. Trivelpiece
Life of this patent
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Abstract
Systems and methods for operating a tag. The method comprising: causing motion of a spherical permanent magnet which is disposed and freely movable in a three dimensional internal space of a non-magnetic hollow sphere located within the tag; using the spherical permanent magnet's motion to cause a change in a magnetic flux in a wire wrapped around at least a portion of the non-magnetic hollow sphere, where the change in the magnetic flux induces a current in the wire; and supplying the current to at least one device of the tag's internal electronic devices that is configured to facilitate at least one of an inventory count and an inventory security.
Claims7
A security tag detectable by a wireless tag reader, comprising:
- an internal electricity generator comprising:
- a non-magnetic hollow sphere forming therein an internal space;
- a spherical permanent magnet, disposed and freely movable within the sphere;
- a wire wrapped around at least a portion of the sphere;
- wherein motion of the magnet in the space induces a current in the wire;
- and
- a security component comprising at least one of a Radio Frequency Identification (“RFID”) component and an Electronic Article Surveillance (“EAS”) component connected to the wire to form a circuit, and operative upon a threshold flow of current to indicate that the tag is in motion.
Dependencies are inferred from the claim text.