Wearable heart rate monitor
AssigneeFitbit, Inc.
InventorsSubramaniam Venkatraman, Shelten Gee Jao Yuen
Life of this patent
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Abstract
A biometric monitoring device is used to determine a user's heart rate by using a heartbeat waveform sensor and a motion detecting sensor. In some embodiments, the device collects collecting concurrent output data from the heartbeat waveform sensor and output data from the motion detecting sensor, detects a periodic component of the output data from the motion detecting sensor, and uses the periodic component of the output data from the motion detecting sensor to remove a corresponding periodic component from the output data from the heartbeat waveform sensor. From this result, the device may determine and present the user's heart rate.
Claims30
A method of determining a user's heart rate using a worn biometric monitoring device comprising a plurality of sensors including a heartbeat waveform sensor and a motion detecting sensor, the method comprising:
- (a) collecting concurrent output data from the heartbeat waveform sensor and output data from the motion detecting sensor, wherein the output data from the heart beat waveform sensor provides information about the user's heart rate and wherein the output data from the motion detecting sensor provides information about the user's periodic physical movements other than heartbeats;
- (b) determining a periodic component of the output data from the motion detecting sensor;
- (c) filtering the output data from the heartbeat waveform sensor to remove variations that are slow with respect to an expected heart rate, wherein the filtering produces high pass filtered output data from the heartbeat waveform sensor;
- (d) determining the user's heart rate;
- and
- (e) presenting the user's heart rate.
A wearable fitness monitoring device comprising:
- a motion sensor configured to provide output corresponding to motion by a user wearing the fitness monitoring device;
- a heartbeat waveform sensor;
- and
- control logic comprising instructions for:
- (a) collecting concurrent output data from the heartbeat waveform sensor and output data from the motion detecting sensor, wherein the output data from the heart beat waveform sensor provides information about the user's heart rate and wherein the output data from the motion detecting sensor provides information about the user's periodic physical movements other than heartbeats;
- (b) determining a periodic component of the output data from the motion detecting sensor;
- (c) filtering the output data from the heartbeat waveform sensor to remove variations that are slow with respect to an expected heart rate, wherein the filtering produces high pass filtered output data from the heartbeat waveform sensor;
- (d) determining the user's heart rate;
- and
- (e) presenting the user's heart rate.
Dependencies are inferred from the claim text.