Apparatus for detecting biometric information of living body

Patent metadata

Field	Value
Publication number	US-2016206221-A1
Application number	US-201615001753-A
Country	US
Kind code	A1
Filing date	Jan 20, 2016
Priority date	Jan 21, 2015
Publication date	Jul 21, 2016
Grant date	—

Abstract

An apparatus for detecting biometric information of a living body detects a pulse wave and extracts the biometric information of the living body in a non-invasive method. The apparatus for detecting biometric information includes a surface pulse wave measurement unit for measuring a surface pulse wave of an object. The surface pulse wave measurement unit includes at least one light source that radiates incoherent light and at least one photodetector that measures an intensity of light radiated by the at least one light source and reflected from a surface of the object. The surface pulse wave measurement unit measures the surface pulse wave of the object based on a change in the intensity of the light reflected from the surface of the object.

First claim

What is claimed is:

1 . An apparatus for detecting biometric information, the apparatus comprising:
a surface pulse wave measurement unit comprising:
at least one light source configured to radiate light to an surface of an object;
at least one photodetector configured to measure an intensity of light radiated by the at least one light source and reflected from the surface of the object; and
a guide portion configured to fix the at least one light source and the at least one photodetector to be separated from the surface of the object, the surface pulse wave measurement unit measuring a surface pulse wave of the object based on the measured intensity of the light; and
a biometric signal extractor configured to extract a plurality of biometric signal parameters based on the measured surface pulse wave of the object.

2 . The apparatus of claim 1 , wherein one light source of the at least one light source and one photodetector of the at least one photodetector are disposed adjacently to each other to form a pair.

3 . The apparatus of claim 2 , wherein the guide portion comprises at least one partition disposed between the pair of the light source and the photodetector and another pair of another light source of the at least one light source and another photodetector of the at least one photodetector.

4 . The apparatus of claim 1 , wherein a plurality of photodetectors that comprises the at least photodetector are disposed around the at least one light source.

5 . The apparatus of claim 4 , wherein the guide portion comprises a plurality of partitions, each of the plurality of partitions being disposed between adjacent ones of the plurality of photodetectors.

6 . The apparatus of claim 1 , wherein the biometric signal extractor comprises:
a peak detector configured to extract a peak of the measured surface pulse wave; a dicrotic notch detector configured to extract a dicrotic notch of the measured surface pulse wave; a heart rate detector configured to count a number of surface pulse waves per unit time, the number of surface pulse waves comprising the measured surface pulse wave; and a pulse time detector configured to extract a pulse transit time (PTT) of the measured surface pulse wave between at least two different positions on the object.

7 . The apparatus of claim 6 , further comprising an analyzer configured to analyze biometric information including blood vessel elasticity, a flow rate velocity, a degree of arteriosclerosis, a systolic blood pressure, or a diastolic blood pressure of a blood vessel, based on the plurality of parameters including the peak, the dicrotic notch, the heart rate, or the PTT.

8 . An apparatus for detecting biometric information, the apparatus comprising:
a surface pulse wave measurement unit comprising:
at least one light source;
at least one photodetector configured to measure an intensity of light radiated by the at least one light source and reflected from a surface of an object; and
a guide portion configured to fix the at least one light source and the at least one photodetector to be separated from the surface of the object, the surface pulse wave measurement unit measuring a surface pulse wave of the object based on the measured intensity of the light;
a photo-plethysmogram measurement unit configured to measure a photo-plethysmogram (PPG) signal of the object; and a biometric signal extractor configured to extract a plurality of biometric signal parameters based on the measured surface pulse wave and the measured PPG signal.

9 . The apparatus of claim 8 , wherein the PPG measurement unit comprises:
at least one light source disposed to be in contact with the surface of the object; and at least one photodetector disposed to be in contact with the surface of the object.

10 . The apparatus of claim 9 , wherein one light source of the at least one light source of the surface pulse wave measurement unit and one photodetector of the at least one photodetector of the surface pulse wave measurement unit are disposed adjacently to each other to form a pair, and
wherein one light source of the at least one light source of the PPG measurement unit and one photodetector of the at least one photodetector of the PPG measurement unit are disposed next to each other form a pair.

11 . The apparatus of claim 10 , wherein the guide portion comprises at least one partition disposed between the pair of the light source and the photodetector of the surface pulse wave measurement unit.

12 . The apparatus of claim 10 , wherein the pair of the surface pulse wave measurement unit and the pair of the PPG measurement unit are disposed adjacently to each other, and
wherein the guide portion comprises at least one partition between the pair of the surface pulse wave measurement unit and the pair of the PPG measurement unit.

13 . The apparatus of claim 12 , wherein the pair of the surface pulse wave measurement unit is fixed to an upper portion of the partition and the pair of the PPG measurement unit is fixed to a lower portion of the partition.

14 . The apparatus of claim 8 , wherein a plurality of photodetectors of the surface pulse wave measurement unit that comprises the at least one photodetector are disposed around the at least one light source of the surface pulse wave measurement unit.

15 . The apparatus of claim 14 , wherein the PPG measurement unit comprises a plurality of photodetectors disposed to be in contact with the surface of the object, and
wherein the plurality of photodetectors of the PPG measurement unit are disposed around the at least one light source of the surface pulse wave measurement unit.

16 . The apparatus of claim 15 , wherein the plurality of photodetectors of the surface pulse wave measurement unit and the plurality of photodetectors of the PPG measurement unit are alternately disposed.

17 . The apparatus of claim 8 , wherein the biometric signal extractor comprises:
a direct current (DC) component detector configured to extract a DC component of the PPG signal; a peak detector configured to extract a peak of the surface pulse wave; a dicrotic notch detector configured to extract a dicrotic notch of the surface pulse wave; a heart rate detector configured to count a number of surface pulse waves per unit time; and a pulse time detector configured to extract a pulse transit time (PTT) of the surface pulse wave between at least two different positions on the object.

18 . The apparatus of claim 17 , further comprising an analyzer configured to analyze biometric information including blood vessel elasticity, a flow rate velocity, a degree of arteriosclerosis, a systolic blood pressure, or a diastolic blood pressure of a blood vessel based on the plurality of parameters including the DC component, the peak, the dicrotic notch, the heart rate, or the PTT.

19 . The apparatus of claim 18 , further comprising a display configured to display the extracted plurality of parameters or the analyzed biometric information.

20 . The apparatus of claim 8 , wherein the surface pulse wave measurement unit and the PPG measurement unit are disposed in a wearing unit wearable by the object.

21 . The apparatus of claim 8 , wherein the light radiated by the at least one light source is incoherent light, and the surface pulse wave measurement unit is configured to measure the surface pulse wave of the object based on a change in the intensity of the light reflected from the surface of the object.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Younho
• Kwon Yongjoo
• Kang Jaemin
• Kim Sunkwon
• Park Sangyun

Classifications

• A61B2562/04

  Arrangements of multiple sensors of the same type · CPC title

• A61B5/681 Primary

  Wristwatch-type devices · CPC title

• A61B5/02108

  from analysis of pulse wave characteristics · CPC title

• A61B5/6813

  Specially adapted to be attached to a specific body part (A61B5/6802 takes precedence) · CPC title

• A61B5/6801

  specially adapted to be attached to or worn on the body surface · CPC title