Systems, methods, and apparatus for increased foreign object detection loop array sensitivity
First Claim
1. An apparatus for detecting a presence of an object, comprising:
- a plurality of electrically conductive loops arranged in an array;
a sensor circuit configured to determine a characteristic comprising a loop resonance frequency associated with each of the plurality of loops;
a hardware processor configured to;
for each loop of the plurality of loops, determine a parameter comprising a sum of a deviation of the characteristic associated with the loop from a reference value and a deviation of the characteristic associated with at least one adjacent loop from the reference value, wherein the parameter for at least two of the plurality of loops includes a deviation of the characteristic associated with the same adjacent loop; and
determine the presence of the object based on the parameter.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for detecting a presence of an object can include a plurality of electrically conductive loops arranged in an array. The apparatus includes a sensor circuit configured to determine a characteristic associated with each of the plurality of loops. The apparatus includes a hardware processor configured to, for each loop of the plurality of loops, determine a parameter based on the characteristic associated with the loop and the characteristic associated with at least one adjacent loop. The hardware processor may be further configured to determine the presence of the object based on the parameter. The parameter may comprise a sum of a difference between the characteristic associated with the loop and a reference value for the characteristic, and a difference between the characteristic associated with each of the at least one adjacent loop and the reference value.
40 Citations
26 Claims
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1. An apparatus for detecting a presence of an object, comprising:
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a plurality of electrically conductive loops arranged in an array; a sensor circuit configured to determine a characteristic comprising a loop resonance frequency associated with each of the plurality of loops; a hardware processor configured to; for each loop of the plurality of loops, determine a parameter comprising a sum of a deviation of the characteristic associated with the loop from a reference value and a deviation of the characteristic associated with at least one adjacent loop from the reference value, wherein the parameter for at least two of the plurality of loops includes a deviation of the characteristic associated with the same adjacent loop; and determine the presence of the object based on the parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting a presence of an object, comprising:
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determining a characteristic comprising a loop resonance frequency associated with each of a plurality of electrically conductive loops arranged in an array; for each loop of the plurality of loops, determining a parameter comprising a sum of a deviation of the characteristic associated with the loop from a reference value and a deviation of the characteristic associated with at least one adjacent loop from the reference value, wherein the parameter for at least two of the plurality of loops includes a deviation of the characteristic associated with the same adjacent loop; and determining the presence of the object based on the parameter. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for detecting a presence of an object, comprising:
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means for determining a characteristic comprising a loop resonance frequency associated with each of a plurality of loops of a loop array; means for, for each loop of the plurality of loops, determining a parameter comprising a sum of a deviation of the characteristic associated with the loop from a reference value and a deviation of the characteristic associated with at least one adjacent loop from the reference value, wherein the parameter for at least two of the plurality of loops includes a deviation of the characteristic associated with the same adjacent loop; and means for determining the presence of the object based on the parameter. - View Dependent Claims (18, 19, 20, 21)
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22. A non-transitory computer-readable medium for detecting a presence of an object having encoded thereon instructions that when executed cause an apparatus to:
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determine a characteristic comprising a loop resonance frequency associated with each of a plurality of electrically conductive loops arranged in an array; for each loop of the plurality of loops, determine a parameter comprising a sum of a deviation of the characteristic associated with the loop from a reference value and a deviation of the characteristic associated with at least one adjacent loop from the reference value, wherein the parameter for at least two of the plurality of loops includes a deviation of the characteristic associated with the same adjacent loop; and determine the presence of the object based on the parameter. - View Dependent Claims (23, 24, 25, 26)
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Specification