Object identification system and method
First Claim
Patent Images
1. A method of tracking an object, comprising:
- producing a guided surface wave with a guided surface waveguide probe comprising a charge terminal elevated over a terrestrial medium by generating at least one resultant field that synthesizes a wave front incident at a complex Brewster angle of incidence (θ
i,R) of the terrestrial medium, the guided surface wave having sufficient energy density to power object identification tags across an area of interest;
receiving return signals from a tag of interest at plural receivers, the tag of interest associated with an object and the receivers that receive the return signals change over time as the tag moves with the associated object in the area of interest; and
identifying a series of geolocations at which the object was present as a function of time according to the received reply signals from the tag.
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Abstract
A method of tracking an object including producing a guided surface wave with a guided surface waveguide probe, the guided surface wave having sufficient energy density to power object identification tags across an area of interest; receiving return signals from a tag of interest at plural receivers, the tag of interest associated with an object and the receivers that receive the return signals change over time as the tag moves with the associated object in the area of interest; and identifying a series of geolocations at which the object was present as a function of time according to the received reply signals from the tag.
104 Citations
15 Claims
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1. A method of tracking an object, comprising:
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producing a guided surface wave with a guided surface waveguide probe comprising a charge terminal elevated over a terrestrial medium by generating at least one resultant field that synthesizes a wave front incident at a complex Brewster angle of incidence (θ
i,R) of the terrestrial medium, the guided surface wave having sufficient energy density to power object identification tags across an area of interest;receiving return signals from a tag of interest at plural receivers, the tag of interest associated with an object and the receivers that receive the return signals change over time as the tag moves with the associated object in the area of interest; and identifying a series of geolocations at which the object was present as a function of time according to the received reply signals from the tag. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for tracking an object, comprising:
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a guided surface waveguide probe comprising a charge terminal elevated over a terrestrial medium that produces a guided surface wave by generating at least one resultant field that synthesizes a wave front incident at a complex Brewster angle of incidence (θ
i,R) of the terrestrial medium, from which object identification tags obtain electrical power to operate across an area of interest, each tag associated with an object;a plurality of receivers deployed at strategic locations to receive return signals from one or more of the tags as the tags move with the associated objects during a lifecycle of the objects; and a computer system operatively coupled with the receivers, the computer system configured to identify a series of geolocations at which the object was present as a function of time according to the received reply signals from the tag. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of tracking an object, comprising:
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producing a guided surface wave with a guided surface waveguide probe, the guided surface wave having sufficient energy density to power object identification tags across an area of interest; receiving return signals from a tag of interest at plural receivers, the tag of interest associated with an object and the receivers that receive the return signals change over time as the tag moves with the associated object in the area of interest; and identifying a series of geolocations at which the object was present as a function of time according to the received reply signals from the tag, wherein at least one of the geolocations in the series is determined by triangulation using a corresponding return signal that is received at two receivers.
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Specification