OPPORTUNISTIC MAGNETOMETER CALIBRATION
First Claim
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1. A mobile device comprising:
- a magnetometer configured to sense a magnetic field and to provide indications of the magnetic field; and
a processor communicatively coupled to the magnetometer and configured to;
determine an occurrence of a trigger condition associated with imminent motion of the mobile device, present motion of the mobile device, or decalibration of the magnetometer;
respond to determining the occurrence of the trigger condition by causing the magnetometer to sense the magnetic field and to provide the indications of the magnetic field; and
determine at least one bias of the magnetometer using the indications of the magnetic field.
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Abstract
A mobile device includes: a magnetometer configured to sense a magnetic field and to provide indications of the magnetic field; and a processor communicatively coupled to the magnetometer and configured to: determine an occurrence of a trigger condition associated with imminent motion of the mobile device, present motion of the mobile device, or decalibration of the magnetometer; respond to determining the occurrence of the trigger condition by causing the magnetometer to sense the magnetic field and to provide the indications of the magnetic field; and determine at least one bias of the magnetometer using the indications of the magnetic field.
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Citations
30 Claims
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1. A mobile device comprising:
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a magnetometer configured to sense a magnetic field and to provide indications of the magnetic field; and a processor communicatively coupled to the magnetometer and configured to; determine an occurrence of a trigger condition associated with imminent motion of the mobile device, present motion of the mobile device, or decalibration of the magnetometer; respond to determining the occurrence of the trigger condition by causing the magnetometer to sense the magnetic field and to provide the indications of the magnetic field; and determine at least one bias of the magnetometer using the indications of the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of obtaining and processing readings of a magnetometer of a mobile device, the method comprising:
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determining an occurrence of a trigger condition associated with imminent motion of the mobile device, present motion of the mobile device, or decalibration of the magnetometer; causing, in response to determining the occurrence of the trigger condition, the magnetometer to sense a magnetic field and to provide indications of the magnetic field; and determining at least one bias of the magnetometer using the indications of the magnetic field. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A mobile device comprising:
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means for sensing a magnetic field and providing indications of the magnetic field; means for determining an occurrence of a trigger condition associated with imminent motion of the mobile device, present motion of the mobile device, or decalibration of the means for sensing the magnetic field; means for causing, in response to the occurrence of the trigger condition, the means for sensing to sense the magnetic field and to provide the indications of the magnetic field; and means for determining at least one bias of the means for sensing using the indications of the magnetic field. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A non-transitory, processor-readable storage medium comprising processor-readable instructions to cause a processor to:
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determine an occurrence of a trigger condition associated with imminent motion of a mobile device, present motion of the mobile device, or decalibration of a magnetometer of the mobile device; cause, in response to determining the occurrence of the trigger condition, the magnetometer to sense a magnetic field and to provide indications of the magnetic field; and determine at least one bias of the magnetometer using the indications of the magnetic field. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification