Wearable heart rate monitor

摘要

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.

主权项

1. 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 heartbeat 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) processing the output data from the motion detecting sensor to determine a periodic component of the output data from the motion detecting sensor, and removing the periodic component from the output data from the heartbeat waveform sensor; (c) determining an activity state of the user and from the activity state determining a duty cycle for operating the heartbeat waveform sensor, wherein the duty cycle has (i) an active phase during which the heartbeat waveform sensor is on and collects enough data to determine the user's heart rate and (ii) an inactive phase during which the heartbeat waveform sensor is off and does not provide output data (d) operating the heartbeat waveform sensor at the duty cycle; (e) determining the user's heart rate; and (f) presenting the user's heart rate,. wherein at least operations (a)-(e) are carried out by one or more processors.