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Apparatus for and method of measuring blood pressure

  • US 10,405,806 B2
  • Filed: 12/07/2015
  • Issued: 09/10/2019
  • Est. Priority Date: 03/06/2015
  • Status: Active Grant
First Claim
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1. An apparatus configured to measure blood pressure, the apparatus comprising:

  • a sensor configured to radiate light to a body part, and detect a light signal that is changed due to the body part to which the light is radiated;

    a signal processor configured to determine a bio signal, based on the light signal; and

    a central processing unit configured to;

    correct the bio signal;

    extract feature points from the bio signal that is corrected;

    input the feature points into an artificial neural network algorithm to learn a hidden layer matrix of the artificial neural network algorithm;

    estimate a plurality of blood pressures as a product between the hidden layer matrix and a vector that is formed from the feature points;

    extract one cycle of the bio signal that is corrected;

    extract a systolic upstroke time interval and a diastolic time interval from the one cycle;

    determine a linear relation equation of a blood pressure, from the plurality of blood pressures over the systolic upstroke time interval and the diastolic time interval; and

    determine the blood pressure, based on the linear relation equation.

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