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System and method for determining sleep and sleep stages of a person

  • US 9,820,680 B2
  • Filed: 05/15/2012
  • Issued: 11/21/2017
  • Est. Priority Date: 05/18/2011
  • Status: Active Grant
First Claim
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1. A system for determining sleep, a sleep stage, sleep stage transition, and/or a sleep event of a person, comprising:

  • a wearable device configured for detecting and recording a heart rate of the person and configured for detecting and recording a movement of a part of the body of the person, wherein the movement is caused by a skeletal muscle of the body;

    an analysis device configured for classifying the recorded heart rate of the person into at least one heart rate class and at least one heart rate variability class, configured for classifying the recorded movement into a movement class comprising a large movement (LM), a small movement (SM) or a twitch (TM), based on a calculated intensity and/or duration of each movement, wherein the analysis device is capable of classifying the movement into any of the LM, SM, and TM, and configured for determining sleep, a sleep stage, a sleep stage transition and/or a sleep event of the person based at least partially on the at least one heart rate class, the at least one heart rate variability class, and the movement class; and

    a data connection configured for communicating data representing the recorded heart rate and the recorded movement from the wearable recording device to the analysis device, and wherein the analysis device is configured for classifying the recorded movement into the movement class based on the calculated intensity level of 1 to 2 counts per second, 3 to 5 counts per second, or 6 to 10 counts per second.

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