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US 9,109,905 B2Granted
Device location determination
AssigneePNI Sensor Corporation
InventorGeorge Hsu
Life of this patent
Estimating the term…
Abstract
Methods, apparatuses and systems of estimating a location of a device are disclosed. One method includes determining a first position of the device, sensing at least one magnetic anomaly at the first position, estimating a location of the magnetic anomaly relative to the first position by determining a plurality of magnetic properties of the magnetic anomaly based on sensed signals of at least a magnetic sensor, and estimating a second position of the device based on a sensed change in a distance from the magnetic anomaly to the device.
Claims21
A method of estimating a location of a device, comprising;
- determining a first position of the device;
- sensing at least one magnetic anomaly at the first position;
- estimating a location of the magnetic anomaly relative to the first position by determining a plurality of magnetic properties of the magnetic anomaly based on sensed signals of at least a magnetic sensor;
- and
- estimating a second position of the device based on a sensed change in a distance from the magnetic anomaly to the device.
2 more elements
An apparatus, comprising;
- a magnetic sensor;
- a controller, wherein at least one of the controller and one or more external controllers are operative to:
- determine a first position of the apparatus;
- sense at least one magnetic anomaly at the first position;
- estimate a location of the magnetic anomaly relative to the first position by determining a plurality of magnetic properties of the magnetic anomaly based on sensed signals of at least the magnetic sensor;
- and
- estimate a second position of the apparatus based on a sensed change in a distance from the magnetic anomaly to the apparatus.
4 more elements
Dependencies are inferred from the claim text.