Method and device for electronic identification
First Claim
1. An electronic identification device, comprising:
- means for generating and transmitting an electromagnetic field;
a plurality of transponder units, each of which including storing means for storing identification data, and transmitter means for transmitting a signal comprising said identification data when each of said transponder units has been exposed to said electromagnetic field;
receiver means for receiving said signal and for decoding said identification data;
at least one element made of a material, having at least one of a magnetic property and electric property being affected by an external magnetic field, being arranged within said transponder unit;
means for generating said magnetic field being provided at an interrogation zone to affect elements located in said interrogation zone; and
processing means being provided in said transponder unit for modifying said signal in dependence of the magnetic field affecting said at least one element.
3 Assignments
0 Petitions
Accused Products
Abstract
Electronic identification device includes a circuitry (10) for generating and emitting an electromagnetic field and a plurality of transponder units (11). Each of the transponder unit includes a storing circuitry (12) for storing identification data, and a transmitting circuitry (13) for transmitting a signal including the identification data when the transponder unit (11) has been exposed to the electromagnetic field. The electronic identification device further includes a receiving circuitry (14) for receiving the signal and for decoding the identification data. At least one element (15) of a material, having the magnetic or electrical properties being influenced by external magnetic fields, is disposed on or in the absolute vicinity of the transponder unit (11), and a magnetic field generating circuitry (16) for generating a magnetic field is provided at an interrogation zone (17) to activate any element (15) appearing in the interrogation zone (17). A processing circuitry (18) is provided in the transponder unit (11) to modify the signal in dependence of the magnetic field activating the element (15).
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Citations
8 Claims
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1. An electronic identification device, comprising:
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means for generating and transmitting an electromagnetic field; a plurality of transponder units, each of which including storing means for storing identification data, and transmitter means for transmitting a signal comprising said identification data when each of said transponder units has been exposed to said electromagnetic field; receiver means for receiving said signal and for decoding said identification data; at least one element made of a material, having at least one of a magnetic property and electric property being affected by an external magnetic field, being arranged within said transponder unit; means for generating said magnetic field being provided at an interrogation zone to affect elements located in said interrogation zone; and processing means being provided in said transponder unit for modifying said signal in dependence of the magnetic field affecting said at least one element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Method of electronically identifying objects according to which an electromagnetic field is generated be transmitted into an interrogation zone, comprising the steps of:
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initiating transmission of a reply signal associated to each of said objects to be transmitted; transmitting the reply signal as an electromagnetic signal from said one object; receiving and decoding said reply signal, each of said objects storing by electronic means identification data; providing an element, having magnetic properties being changed by an external magnetic field; and exposing the element to a magnetic field in said interrogation zone; and affecting the reply signal, by a change of magnetic properties of said element, in a characteristic manner of the magnetic field of the interrogation zone in which said element is located.
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Specification