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Monitoring device with an accelerometer, method and system

  • US 8,460,199 B2
  • Filed: 12/07/2011
  • Issued: 06/11/2013
  • Est. Priority Date: 07/28/2010
  • Status: Expired due to Fees
First Claim
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1. A device for monitoring a real-time vital sign of a user, the device comprising:

  • an article attached to the user;

    an optical sensor for generating a real-time digitized optical signal corresponding to a flow of blood through an artery of the user, the optical sensor comprising a photodetector, a first LED emitting a green light, a second LED emitting a green light, and a light barrier, the light barrier preventing the photodetector from receiving direct light from the first LED or the second LED;

    an accelerometer connected to the article, the accelerometer generating a real-time accelerometer data comprising a X-axis signal, a Y-axis signal and a Z-axis signal based on a movement of the user; and

    a processor configured to receive the real-time digital signal from the optical sensor and configured to receive the real-time accelerometer data from the accelerometer, the processor configured to generate a period of motion Comb filter value from the real-time accelerometer data utilizing an array of Comb filters, the processor configured to generate a real-time heart rate for the user based on the real-time digital signal filtered by suppressing the period of motion Comb filter value and a heart rate Comb filter value.

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