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 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) processing the output data from the motion detecting sensor to determine a periodic component of the output data from the motion detecting sensor; (c) determining an expected heart rate by analyzing the output data from the motion detecting sensor and detecting an intensity of user activity or a type of user activity; (d) from the expected heart rate, setting a high pass frequency for filtering; (e) filtering the output data from the heartbeat waveform sensor, using the high pass frequency, 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; (f) determining the user's heart rate; and (g) presenting the user's heart rate.