Magnetometer accuracy and use
First Claim
1. A method performed by a processor of a mobile device having a magnetometer, the method comprising:
- 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 using tactile feedback.
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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
42 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 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 using tactile feedback. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile device comprising:
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a magnetometer; one or more processors configured to perform operations including; 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 using tactile feedback. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method performed by a processor of a mobile telephone 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, where the calibration or recalibration procedure includes obtaining historical magnetometer data and calibrating or recalibrating the magnetometer using the historical magnetometer data; and presenting an indication of the accuracy metric on a touch sensitive display of the mobile device using a graphical indicator. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A mobile device comprising:
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a motion sensor; a camera; a magnetometer; one or more processors configured to perform operations including; 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 using a graphical indicator. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method performed by a processor of a mobile device having a magnetometer, the method comprising:
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determining that the mobile device is docked in a car; 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. - View Dependent Claims (42)
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Specification