AUTOMATIC TRACK SELECTION FOR CALIBRATION OF PEDOMETER DEVICES
First Claim
1. A method for calibrating a pedometer device, the method comprising:
- detecting, by the pedometer device, a sustained locomotion activity in progress;
activating, by the pedometer device, a GPS receiver to obtain a location fix;
determining, by the pedometer device, whether the location fix is reliable;
initiating, by the pedometer device, a calibration process that uses data from the GPS receiver in response to determining that the location fix is reliable; and
inactivating, by the pedometer device, the GPS receiver in response to determining that the location fix is not reliable.
1 Assignment
0 Petitions
Accused Products
Abstract
A calibration track to use for pedometer calibration can be automatically selected based on detecting sustained locomotion activity and an ability to obtain and maintain a reliable location fix over a calibration period. Calibration tracks can be generated, rated for quality, and used to compute calibration parameters to convert accelerometer data to stride length and/or distance traveled. Quality of a calibration can be assessed, and old and new calibration parameter sets can be combined based on quality weights assigned to each. Calibration parameters can be separately maintained for different locomotion activities and/or different on-body locations of the pedometers. Pedometer devices can also cooperatively calibrate each other.
36 Citations
20 Claims
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1. A method for calibrating a pedometer device, the method comprising:
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detecting, by the pedometer device, a sustained locomotion activity in progress; activating, by the pedometer device, a GPS receiver to obtain a location fix; determining, by the pedometer device, whether the location fix is reliable; initiating, by the pedometer device, a calibration process that uses data from the GPS receiver in response to determining that the location fix is reliable; and inactivating, by the pedometer device, the GPS receiver in response to determining that the location fix is not reliable. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electronic device comprising:
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a GPS receiver module; an accelerometer; a storage medium; and a processing subsystem coupled to the GPS receiver module, the accelerometer, and the storage medium, the processor being configured to; detect, based at least in part on signals from the accelerometer, a sustained locomotion activity in progress; activate the GPS receiver module to obtain a location fix; determine whether the location fix is reliable; initiate a calibration process that uses data from the GPS receiver module in response to determining that the location fix is reliable; and inactivate the GPS receiver module in response to determining that the location fix is not reliable. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A computer-readable storage medium having stored thereon program instructions that, when executed by a processing subsystem in an electronic device, cause the processing subsystem to perform a method comprising:
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detecting, based at least in part on accelerometer data received at the electronic device, a sustained locomotion activity in progress; activating a GPS receiver to obtain a location fix for the electronic device; determining whether the location fix is reliable; initiating a calibration process that uses data from the GPS receiver in response to determining that the location fix is reliable; and inactivating the GPS receiver in response to determining that the location fix is not reliable. - View Dependent Claims (19, 20)
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Specification