MOTION COMPENSATION FOR OPTICAL HEART RATE SENSORS
First Claim
1. A method of optical heart rate sensing, comprising:
- recognizing a minimum amount of motion of an optical heart rate sensor during a testing duration;
recognizing an average amount of motion of the optical heart rate sensor during the testing duration;
applying compensation for motion of the optical heart rate sensor if the minimum amount of motion during the testing duration exceeds a first threshold, even if the average amount of motion during the testing duration is less than a second threshold, greater than the first threshold; and
omitting compensation for motion of the optical heart rate sensor if the minimum amount of motion during the testing duration is below the first threshold, even if the average amount of motion during the testing duration is greater than the second threshold.
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Abstract
A method for an optical heart rate sensor comprises recognizing a minimum amount of motion of the optical heart rate sensor during a testing duration and recognizing an average amount of motion of the optical heart rate sensor during the testing duration. The motion of the optical heart rate sensor is compensated for if the minimum amount of motion during the testing duration exceeds a first threshold, even if the average amount of motion during the testing duration is less than a second threshold, greater than the first threshold. The motion of the optical heart rate sensor is not compensated for if the minimum amount of motion during the testing duration is below the first threshold, even if the average amount of motion during the testing duration is greater than the second threshold.
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Citations
20 Claims
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1. A method of optical heart rate sensing, comprising:
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recognizing a minimum amount of motion of an optical heart rate sensor during a testing duration; recognizing an average amount of motion of the optical heart rate sensor during the testing duration; applying compensation for motion of the optical heart rate sensor if the minimum amount of motion during the testing duration exceeds a first threshold, even if the average amount of motion during the testing duration is less than a second threshold, greater than the first threshold; and omitting compensation for motion of the optical heart rate sensor if the minimum amount of motion during the testing duration is below the first threshold, even if the average amount of motion during the testing duration is greater than the second threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of optical heart rate sensing, comprising:
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receiving an optical signal from one or more optical sensors; receiving a motion signal from one or more motion sensors; determining a minimum difference for the motion signal over a testing duration; determining a maximum magnitude for the motion signal over the testing duration; applying a first motion filter to the optical signal during conditions where the minimum difference for the motion signal over the testing duration is greater than a first threshold and the maximum magnitude for the motion signal over the testing duration is less than a second threshold, the second threshold greater than the first threshold; and not applying a motion filter to the optical signal during conditions where the minimum difference for the motion signal over the testing duration is less than the first threshold even if the maximum magnitude for the motion signal over the testing duration is greater than the second threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An optical heart rate sensor, comprising:
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an optical source configured to illuminate one or more blood vessels through a user'"'"'s skin, an optical sensor configured to measure illumination from the one or more blood vessels; a three-axis accelerometer; and a storage machine holding instructions executable by a logic machine to; receive an optical signal from the optical sensor; receive a motion signal from the three-axis accelerometer, the motion signal comprising three signal channels; determine a minimum difference for the motion signal during a testing duration; determine a maximum magnitude for the motion signal during the testing duration; apply a first motion filter to the optical signal during conditions where the minimum difference for the motion signal over the testing duration is greater than a first threshold and the maximum magnitude for the motion signal over the testing duration is less than a second threshold, the second threshold greater than the first threshold; not apply a motion filter to the optical signal during conditions where the minimum difference for the motion signal over the testing duration is less than the first threshold even if the maximum magnitude for the motion signal over the testing duration is greater than the second threshold; indicate a heart rate of a user based on the filtered optical signal during conditions where the minimum difference for the motion signal over the testing duration is greater than the first threshold and the maximum magnitude for the motion signal over the testing duration is less than the second threshold; and indicate a heart rate of the user based on the unfiltered optical signal during conditions where the minimum difference for the motion signal over the testing duration is less than the first threshold even if the maximum magnitude for the motion signal over the testing duration is greater than the second threshold. - View Dependent Claims (19, 20)
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Specification