Location detection system and method with fingerprinting
First Claim
1. A method for detecting a location of a target device, the method comprising acts of:
- providing a plurality of field devices configured to communicate with each other using signals having signal strength, in an area having a plurality of nodes and the target device;
determining an expected signal strength of signals from each of the plurality of field devices at each of the plurality of nodes;
associating each determined expected signal strength at each of the plurality of nodes with one of the plurality of field devices;
for each of the plurality of field devices in communication with the target device;
measuring a first actual signal strength from the field device at the target device;
designating a portion of the nodes as valid nodes; and
identifying one of the nodes designated as a valid node at which the measured first actual and the determined expected signal strengths agree as the location of the target device,wherein the portion of the nodes designated as valid nodes are only nodes having the expected signal strength for each of the field devices in communication with the target device being greater than or equal to the actual signal strength measured from the respective field device.
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Accused Products
Abstract
A location detection system and method with fingerprinting including defining nodes in an area, the area being associated with field devices and a target device; determining expected signal strengths from the field devices at the nodes; measuring actual signal strengths from the field devices at the target device for each of the field devices in communication with the target device; designating as valid nodes the nodes having the expected signal strength for a particular field device that is greater than or equal to the actual signal strength for a particular field device; and determining at least one of the valid nodes for which the actual signal strengths for the field devices agree with the expected signal strengths for the field devices at the at least one of the valid nodes.
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Citations
20 Claims
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1. A method for detecting a location of a target device, the method comprising acts of:
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providing a plurality of field devices configured to communicate with each other using signals having signal strength, in an area having a plurality of nodes and the target device; determining an expected signal strength of signals from each of the plurality of field devices at each of the plurality of nodes; associating each determined expected signal strength at each of the plurality of nodes with one of the plurality of field devices; for each of the plurality of field devices in communication with the target device; measuring a first actual signal strength from the field device at the target device; designating a portion of the nodes as valid nodes; and identifying one of the nodes designated as a valid node at which the measured first actual and the determined expected signal strengths agree as the location of the target device, wherein the portion of the nodes designated as valid nodes are only nodes having the expected signal strength for each of the field devices in communication with the target device being greater than or equal to the actual signal strength measured from the respective field device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for detecting a location of a target device, the system comprising:
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a plurality of field devices configured to communicate with each other using signals having signal strength, in an area having a plurality of nodes and the target device; and a processor configured to; determine an expected signal strength of signals from each of the plurality of field devices at each of the plurality of nodes, each determined expected signal strength at each of the plurality of nodes is associated with one of the plurality of field devices; for each of the plurality of field devices in communication with the target device; measure a first actual signal strength from the field device at the target device; designate a portion of the nodes as valid nodes; and identify one of the nodes designated as a valid node at which the measured first actual and the determined expected signal strengths agree as the location of the target device, wherein the portion of the nodes designated as valid nodes are only nodes having the expected signal strength for each of the field devices in communication with the target device being greater than or equal to the actual signal strength measured from the respective field device. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for detecting a location of a target device, the method comprising acts of:
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providing a plurality of field devices configured to communicate with each other using signals having signal strength, in an area having a plurality of nodes and the target device; determining an expected signal strength of signals from the target device of the plurality of field devices to each of the plurality of field devices; associating each determined expected signal strength at each of the plurality of nodes with one of the plurality of field devices; for each of the plurality of field devices in communication with the target device; measuring a first actual signal strength from the target device to the field device; designating a portion of the nodes as valid nodes; identifying one of the nodes designated as a valid node at which the measured first actual and the determined expected signal strengths agree as first valid nodes; determining an expected node location of the first valid nodes; measuring an actual node location of the first valid nodes; and determining node location differences between the expected and actual node locations, wherein the portion of the nodes designated as valid nodes are only nodes having the expected signal strength for each of the field devices in communication with the target device being greater than or equal to the actual signal strength measured from the respective field device. - View Dependent Claims (20)
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Specification