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US 6,204,765 B1Granted
Method of detecting relative direction of motion of a radio frequency (RF) tag
AssigneeInkrmec IP Corp.
InventorsMichael J. Brady, Rene D. Martinez, Paul A. Moskowitz
Life of this patent
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Abstract
A method of determining relative motion between a base station and an RF Tag is disclosed, wherein a property of the RF field at the position of the tag is determined at a first time and at a second time and is used to calculate the relative motion.
Claims10
A method of determining the relative motion between a radio frequency (RF) transponder (tag) and a base station, wherein the base station produces an RF field at the position of the tag, comprising:
- a) determining a property of the RF field at the position of the tag at a first time t1;
- b) determining the property of the RF field at the position of the tag at a second time t2;
- and
- c) determining the relative motion between the tag and the base station.
1 more element
Dependencies are inferred from the claim text.