System for authentication of products and a magnetic tag utilized therein
AssigneeAdvanced Coding Systems Ltd.
InventorsVladimir Manov, Evgeni Sorkine, Eli Yarkoni
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Abstract
A magnetic microwire for use in a magnetic tag attachable to a product is provided to enable authentication of the product, as well as the magnetic tag, a detector device and a system for product authentication utilizing the same. The magnetic microwire is a glass-coated amorphous magnetic microwire characterized by a large Barkhausen discontinuity and substantially zero or positive magnetostriction. The microwire is responsive to an external alternating magnetic field generated by the detector device to produce short pulses of magnetic field perturbations.
Claims15
A magnetic tag attachable to a product, the tag comprising at least one magnetic microwire for enabling authentication of the product, wherein the magnetic microwire is a glass-coated amorphous magnetic microwire characterized by a large Barkhausen discontinuity and substantially zero or positive magnetostriction, such that the microwire is responsive to an external alternating magnetic field to produce at least one short pulse of magnetic field perturbations, the at least one short pulse having a defined duration and being detected by a pulse duration detector.
A detector device for detecting a magnetic tag attached to a product, the tag being composed of at least one glass-coated amorphous magnetic microwire characterized by a large Barkhausen discontinuity and substantially zero or positive magnetostriction, such that said at least one microwire can be re-magnetized by an alternating magnetic field to produce at least one short pulse of magnetic field perturbations having a defined duration, the detector device comprising:
- a magnetic field source operable to generate the alternating magnetic field to cause the re-magnetization of said at least one glass-coated amorphous magnetic microwire, when the microwire is located in a region of said alternating magnetic field;
- and a receiver for receiving said at least one short pulse of magnetic field perturbations, determining whether said at least one short pulse has at least approximately the defined duration, and generating a signal indicative that said at least one pulse has at least approximately the defined duration.
A product comprising a tag assembly attached thereto, wherein the tag assembly comprises a magnetic tag comprising at least one glass-coated amorphous magnetic microwire characterized by a large Barkhausen discontinuity and substantially zero or positive magnetostriction, such that, when the tag is located in a region of an external alternating magnetic field, the at least one microwire is re-magnetized by the magnetic field to produce at least one short pulse of magnetic field perturbations, the at least one short pulse having a defined duration and being detected by a pulse duration detector.
A system for product authentication, the system comprising:
- a magnetic tag for attaching to a product, the tag comprising at least one glass-coated amorphous magnetic microwire characterized by a large Barkhausen discontinuity and substantially zero or positive magnetostriction, such that said at least one microwire can be re-magnetized by an alternating magnetic field to produce at least one short pulse of magnetic field perturbations having a defined duration;
- a detector device for detecting said tag, the detector device comprising a magnetic field source operable to generate the alternating magnetic field to cause the re-magnetization of said at least one glass-coated amorphous magnetic microwire, when the microwire is located in a region of said alternating magnetic field, and a receiver for receiving said at least one short pulse, determining whether said at least one short pulse has at least approximately the defined duration, and generating a signal indicative that said at least one pulse has at least approximately the defined duration;
- and an indicator utility responsive to the signal generated by the receiver to provide an indication signal.
Dependencies are inferred from the claim text.