Method and system for calibrating a pedometer
First Claim
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1. A method of calibrating a wearable electronic device, the method comprising:
- receiving location data from a location data unit having a GPS sensor during the activity;
providing, concurrently with the location data, user stride data associated with the user during the activity from an inertial motion unit (IMU) of the wearable electronic device;
computing a speed of the user as a function of the location data from the location data unit as a function of time;
populating a table of the speed of the user as a function of the user stride data;
calibrating the inertial motion unit (IMU) of the wearable electronic device by associating a speed determined using the location data from the location data unit with a measured stride from data from the IMU and writing the association in the table, to provide speed data in the absence of location data;
determining a speed of the user in the absence of data from the location data unit using the inertial motion unit (IMU) by correlating a measured user stride data from the IMU with a stored speed corresponding to the user stride data in the table; and
providing an audio or visual indication of a user'"'"'s current speed in relation to a target speed for an activity to a user wearing the wearable electronic device with a speaker, display or haptic device mounted on the wearable electronic device.
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Abstract
A method of calibrating a wearable electronic device includes providing an indication of a target speed for an activity to a user wearing the wearable electronic device and receiving location data from a location data unit during the activity. The method also includes receiving, concurrently with the location data, user stride data associated with the user during the activity and computing a speed of the user as a function of the location data as a function of time. The method further includes populating a table of the speed of the user as a function of the user stride data and calibrating the wearable electronic device in accordance with the table.
30 Citations
20 Claims
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1. A method of calibrating a wearable electronic device, the method comprising:
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receiving location data from a location data unit having a GPS sensor during the activity; providing, concurrently with the location data, user stride data associated with the user during the activity from an inertial motion unit (IMU) of the wearable electronic device; computing a speed of the user as a function of the location data from the location data unit as a function of time; populating a table of the speed of the user as a function of the user stride data; calibrating the inertial motion unit (IMU) of the wearable electronic device by associating a speed determined using the location data from the location data unit with a measured stride from data from the IMU and writing the association in the table, to provide speed data in the absence of location data; determining a speed of the user in the absence of data from the location data unit using the inertial motion unit (IMU) by correlating a measured user stride data from the IMU with a stored speed corresponding to the user stride data in the table; and providing an audio or visual indication of a user'"'"'s current speed in relation to a target speed for an activity to a user wearing the wearable electronic device with a speaker, display or haptic device mounted on the wearable electronic device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of calibrating a wearable electronic device, the method comprising:
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initiating an activity having a target speed for a portion of the activity; providing a series of measurements related to a user'"'"'s stride during the portion of the activity from an inertial motion unit (IMU) of the wearable electronic device, wherein each of the series of measurements includes data associated with the user'"'"'s stride; receiving, concurrently with the series of measurements related to the user'"'"'s stride, a series of measurements of the user'"'"'s position during the portion of the activity from a GPS sensor; computing a speed of the user as a function of the user'"'"'s position from the GPS sensor as a function of time; populating a table of the speed of the user as a function of the data associated with the user'"'"'s stride; calibrating the inertial motion unit (IMU) of the wearable electronic device by associating a speed determined using the series of measurements of the user'"'"'s position from the GPS sensor with the series of measurements related to a user'"'"'s stride from the IMU and writing the association in the table, to provide speed data in the absence of location data; determining a speed of the user in the absence of data from the GPS sensor using the inertial motion unit (IMU) by correlating a measured user stride data from the IMU with a stored speed corresponding to the user stride data in the table; and providing an audio or visual indication of a user'"'"'s current speed in relation to the target speed for the activity to a user wearing the wearable electronic device with a speaker, display or haptic device mounted on the wearable electronic device. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of determining a speed of a user based on a cadence of the user wearing a wearable electronic device, the method comprising:
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accessing a user profile for the user, wherein the user profile includes a stride model, wherein the stride model is selected using user-specific inputs; measuring acceleration data for the user with an inertial motion unit (IMU) mounted in the wearable electronic device; detecting impact events using the acceleration data; computing the cadence of the user from the impact events and times provided by a timer; determining the speed of the user based on the cadence and the stride model; and providing to the user an indication of the speed of the user with a display, speaker or haptic device. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification