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Reduction of physiological metric error due to inertial cadence

  • US 10,631,740 B2
  • Filed: 11/25/2019
  • Issued: 04/28/2020
  • Est. Priority Date: 01/16/2012
  • Status: Active Grant
First Claim
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1. A heart rate monitor for sensing a heart rate of a user, the heart rate monitor comprising:

  • a photoplethysmograph (PPG) sensor configured to;

    sense light scattered from a body of the user; and

    provide PPG information responsive to the sensed light;

    a step rate sensor configured to;

    sense motion from the user; and

    provide motion information responsive to the sensed motion;

    at least one processor circuit configured to;

    determine a step rate of a user from the motion information provided by the step rate sensor;

    determine an initial instantaneous heart rate from the PPG information provided by the PPG sensor and the motion information provided by the step rate sensor;

    determine a revised heart rate, responsive to whether the initial instantaneous heart rate is within a first crossover window relative to the step rate, from the initial instantaneous heart rate and the step rate;

    determine an output heart rate from the revised heart rate; and

    output the output heart rate.

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