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Motion compensation for optical heart rate sensors

  • US 9,826,938 B2
  • Filed: 09/14/2015
  • Issued: 11/28/2017
  • Est. Priority Date: 10/29/2014
  • Status: Active Grant
First Claim
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1. A method of optical heart rate sensing, comprising:

  • receiving a motion frequency via a motion sensor;

    receiving an optical signal from an optical sensor;

    filtering the motion frequency from the optical signal;

    determining an estimated heart rate frequency based on the filtered optical signal;

    reporting a heart rate based on the motion frequency, but not based on the estimated heart rate frequency responsive to a local neighbor magnitude ratio of the estimated heart rate frequency being less than a confidence threshold; and

    reporting a heart rate based on the estimated heart rate frequency responsive to the local neighbor magnitude ratio of the estimated heart rate frequency being greater than the confidence threshold.

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