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.

Abstract: An electronic pedometer device can be calibrated using other pedometer devices that the user happens to be wearing. For example, a first pedometer can be incorporated into a device wearable on a first portion of a user's body (e.g., the wrist) while a second pedometer is incorporated into a device wearable on another portion of the user's body (e.g., the waist). The pedometer devices can communicate with each other to initiate a calibration period, during which data regarding measured accelerations, step count and/or user location is gathered. After the calibration period, one or both of the devices can use the data to compute calibration parameters, such as a conversion factor for converting a step count to distance and/or other parameters for converting measured accelerations to distance traveled.

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.