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Methods and apparatus for monitoring alertness of an individual utilizing a wearable device and providing notification

  • US 10,055,964 B2
  • Filed: 09/08/2015
  • Issued: 08/21/2018
  • Est. Priority Date: 09/09/2014
  • Status: Active Grant
First Claim
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1. A wearable apparatus for monitoring fatigue and notifying a user, the wearable apparatus comprising:

  • sensors configured to measure biomarkers of the user;

    a notification generator configured to generate a warning to the user in response to receipt of a signal;

    a processor coupled to the sensors and the notification generator, the processor configured to;

    obtain biomarker measurements from the sensors;

    generate a personal circadian rhythm for the user, and the position of the user along that circadian rhythm, using the measured biomarkers;

    identify a baseline risk level for the user by assessing the personal circadian rhythm of the user and the position of the user along that personal circadian rhythm;

    determine a sleep drive of the user based upon continual or periodic sensor measurements, wherein sleep and wakefulness cycles of the user are derived from actigraphy data obtained from the sensors;

    generate a mask event of the personal circadian rhythm based upon changes in body position or activity of the user;

    remove the mask event from a personal circadian rhythm estimate by scaling data from the circadian rhythm to correct for body position as measured by the sensors and averaging the circadian rhythm data in a testing period;

    scale the circadian rhythm data to generate corrected data for an activity of the user during the testing period as measured by the sensors;

    generate a more accurate estimate of the personal circadian rhythm based on the corrected data;

    send the signal to the notification generator when the baseline risk level is in a predetermined range; and

    a support configured to support the sensors, notification generator, and processor on the body of the user.

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