Wrist worn heart rate monitor
First Claim
1. A heart rate monitor that determines a user'"'"'s heart rate, comprising:
- sensing means for sensing a biosignal and producing a sensed signal;
signal modifying means for modifying the sensed signal and producing a modified signal;
characteristic determining means for determining characteristics of a first portion of the modified signal;
matching means for matching a second portion of the modified signal with the characteristics and producing a matched signal therefrom;
matched signal modification means for receiving the matched signal and producing a modified matched signal therefrom; and
heart rate calculating means for receiving the modified matched signal and for calculating the user'"'"'s heart rate from the modified matched signal.
5 Assignments
0 Petitions
Accused Products
Abstract
A wrist worn heart rate monitor (100) senses a noisy biosignal with one sensor (104A) in contact with the user'"'"'s finger and another sensor (104B) in contact with the user'"'"'s wrist. The sensed signal is modified by a filter (112), analog to digital converter (116) and digital filter (264). A correlator (272) and QRS detector (286) are used to determine characteristics of a first segment of the modified signal. A match filter (300) and learned user reference (206) are used to match a second segment of the modified signal with the determined characteristics of the first segment to produce a processed signal. The QRS detector (286), an interval judge (292), and a momentum machine (202) determine the heart rate from the processed signal. A performance predictor (260) predicts how well the heart rate monitor (100) will perform with an individual user.
332 Citations
28 Claims
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1. A heart rate monitor that determines a user'"'"'s heart rate, comprising:
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sensing means for sensing a biosignal and producing a sensed signal; signal modifying means for modifying the sensed signal and producing a modified signal; characteristic determining means for determining characteristics of a first portion of the modified signal; matching means for matching a second portion of the modified signal with the characteristics and producing a matched signal therefrom; matched signal modification means for receiving the matched signal and producing a modified matched signal therefrom; and heart rate calculating means for receiving the modified matched signal and for calculating the user'"'"'s heart rate from the modified matched signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A performance predictor for a heart rate monitor that determines heart rate of a user, the performance predictor comprising:
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signal-to-noise ratio determining means for receiving a processed biosignal and for producing a signal-to-noise ratio signal that is indicative of a signal-to-noise ratio of a section of the processed biosignal; and performance predicting means for receiving the signal-to-noise ratio signal and producing based on the signal-to-noise ratio signal a performance prediction signal that is predictive of an approximate length of time that will be required by the heart rate monitor to determine the heart rate of the user. - View Dependent Claims (23)
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24. A performance predictor for a heart rate monitor that determines heart rate of a user, the performance predictor comprising:
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means for receiving a processed biosignal and for producing a derived property signal that is indicative of a selected derived property of a section of the processed biosignal; and performance predicting means for receiving the derived property signal and producing based on the derived property signal a performance prediction signal that is predictive of a level of performance of the heart rate monitor in determining the heart rate of the user. - View Dependent Claims (25, 26, 27)
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28. A wrist worn heart rate monitor that determines a user'"'"'s heart rate, comprising:
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learning means for learning characteristics of a first portion of a processed biosignal of the user; matching means for matching a second portion of the processed biosignal with the characteristics to produce a matched signal heart rate calculating means responsive to the matched signal for calculating the heart rate of the user; display means for displaying the heart rate of the user; and a container that is of a size suitable to be worn on the wrist of the user and that contains the learning means and the heart rate calculating means.
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Specification