SPATIAL TRACKING SYSTEM AND METHOD
First Claim
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1. A portable device for tracking spatial information, comprising:
- at least one secondary placed within an external electromagnetic field that receives power from said external electromagnetic field to supply energy to device circuitry; and
a controller that senses a strength characteristic of said external electromagnetic field received by said at least one secondary to determine spatial information about said portable device.
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Abstract
The specification discloses a simple and effective system for tracking position and rotation of an object or portable device located within an electromagnetic field. The electromagnetic field may be produced by a primary coil, which inductively couples with one or more secondary coils located within a portable device. The relative strength of this inductive coupling may be used to determine the position, rotation, or both of the portable device relative to the primary coil.
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Citations
13 Claims
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1. A portable device for tracking spatial information, comprising:
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at least one secondary placed within an external electromagnetic field that receives power from said external electromagnetic field to supply energy to device circuitry; and a controller that senses a strength characteristic of said external electromagnetic field received by said at least one secondary to determine spatial information about said portable device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for tracking spatial information about a portable device, comprising:
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a primary producing an electromagnetic field to said portable device; said portable device including at least one secondary having an inductive coupling with said primary, wherein said portable device determines spatial information based on a strength characteristic of said inductive coupling between each of the at least one secondary and said primary. - View Dependent Claims (10, 11, 12, 13)
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Specification