Magnetometer accuracy and use
First Claim
1. A method performed by a processor of a mobile device having a magnetometer, the method comprising:
- determining a first instance of a parameter related to Earth'"'"'s magnetic field using first data generated by the magnetometer, the first data based at least in part on a position of the mobile device with respect to the Earth;
determining a second instance of the parameter using second data generated by a model of Earth'"'"'s magnetic field, the second data based at least in part on the position of the mobile device with respect to the Earth;
comparing the first instance of the parameter with the second instance of the parameter;
determining an accuracy metric for the magnetometer based on results of the comparison; and
presenting an indication of the accuracy metric on the mobile device.
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Accused Products
Abstract
A parameter related to the Earth'"'"'s magnetic field can be used to determine accuracy of a magnetometer of a mobile device. In one aspect, a first instance of a parameter related to Earth'"'"'s magnetic field is determined using data generated by the magnetometer. The magnetometer data can be based in part on a position of the mobile device with respect to the Earth. A second instance of the parameter can be determined using data generated by a model of Earth'"'"'s magnetic field. The model data can also be based in part on the position of the mobile device with respect to the Earth. The first instance of the parameter can be compared with the second instance of the parameter. An accuracy metric for the magnetometer can be determined based on a result of the comparison. An indication of the accuracy metric can be presented by the mobile device.
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Citations
26 Claims
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1. A method performed by a processor of a mobile device having a magnetometer, the method comprising:
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determining a first instance of a parameter related to Earth'"'"'s magnetic field using first data generated by the magnetometer, the first data based at least in part on a position of the mobile device with respect to the Earth; determining a second instance of the parameter using second data generated by a model of Earth'"'"'s magnetic field, the second data based at least in part on the position of the mobile device with respect to the Earth; comparing the first instance of the parameter with the second instance of the parameter; determining an accuracy metric for the magnetometer based on results of the comparison; and presenting an indication of the accuracy metric on the mobile device. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
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a magnetometer; and a processor coupled to the magnetometer, the processor configured for; determining a first instance of a parameter related to Earth'"'"'s magnetic field using first data generated by the magnetometer, the first data based at least in part on a position of the mobile device with respect to the Earth; determining a second instance of the parameter using second data generated by a model of Earth'"'"'s magnetic field, the second data based at least in part on the position of the mobile device with respect to the Earth; comparing the first instance of the parameter with the second instance of the parameter; determining an accuracy metric for the magnetometer based on results of the comparison; and presenting an indication of the accuracy metric on the mobile device. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A computer-readable, non-transitory medium having instructions stored thereon, which, when executed by a processor, causes at least one processor to perform operations comprising:
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determining a first instance of a parameter related to Earth'"'"'s magnetic field using first data generated by the magnetometer, the first data based at least in part on a position of the mobile device with respect to the Earth; determining a second instance of the parameter using second data generated by a model of Earth'"'"'s magnetic field, the second data based at least in part on the position of the mobile device with respect to the Earth; comparing the first instance of the parameter with the second instance of the parameter; determining an accuracy metric for the magnetometer based on results of the comparison; and presenting an indication of the accuracy metric on the mobile device. - View Dependent Claims (13, 14, 15, 16)
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17. A method performed by a processor of a mobile device having a magnetometer, the method comprising:
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determining an accuracy metric based on magnetometer measurements output by the magnetometer during a calibration or recalibration procedure; and presenting an indication of the accuracy metric on the mobile device. - View Dependent Claims (18, 19, 20, 21)
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22. An apparatus, comprising:
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a magnetometer; and a processor coupled to the magnetometer, the processor configured for; determining an accuracy metric based on magnetometer measurements output by the magnetometer during a calibration or recalibration procedure; and presenting an indication of the accuracy metric on the mobile device. - View Dependent Claims (23, 24, 25, 26)
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Specification