DEVICE FOR LOCATING OBJECTS BY RFID COMMUNICATION
First Claim
1. A device for locating objects including an electronic tag of radiofrequency identification (RFID) type having an inductive antenna, the device comprising:
- an array of N fixed RFID tags including one of inductive antennas and markers, placed at known positions, N being an integer greater than 1; and
an RFID tag reader including a fixed reading inductive antenna passing in proximity to the N antennas of the N markers,wherein the configuration of the inductive reading antenna with respect to the positions of the N antennas of the N markers is such that the mutual inductance between the inductive antenna of any marker and the inductive reading antenna is zero.
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Accused Products
Abstract
The invention relates to the locating and identifying of objects with radiofrequency communication by inductive coupling, without electrical contact, between a reader and a tag. The device includes an array of N fixed RFID markers of RFID tag type, with inductive antennas placed at known positions, N being an integer greater than 1 and an RFID tag reader provided with a fixed reading inductive antenna passing in proximity to the N markers. The position of the N markers with respect to the inductive reading antenna is such that the mutual inductance between the inductive antenna of any marker and the inductive reading antenna is zero when no object to be located is present in the vicinity of the array of markers, and nonzero when an RFID tag is present in the vicinity of the marker considered. A coupling is established in the presence of a mobile tag in proximity to a marker.
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Citations
20 Claims
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1. A device for locating objects including an electronic tag of radiofrequency identification (RFID) type having an inductive antenna, the device comprising:
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an array of N fixed RFID tags including one of inductive antennas and markers, placed at known positions, N being an integer greater than 1; and an RFID tag reader including a fixed reading inductive antenna passing in proximity to the N antennas of the N markers, wherein the configuration of the inductive reading antenna with respect to the positions of the N antennas of the N markers is such that the mutual inductance between the inductive antenna of any marker and the inductive reading antenna is zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification