Biological information measurement apparatus, biological information measurement method, biological information measurement system and computer-readable medium

Patent metadata

Field	Value
Publication number	US-2019298197-A1
Application number	US-201916364313-A
Country	US
Kind code	A1
Filing date	Mar 26, 2019
Priority date	Mar 27, 2018
Publication date	Oct 3, 2019
Grant date	—

Abstract

A biological information measurement apparatus comprises: a light source which illuminates a measurement target with light; a light receiving portion which receives a light amount of reflected light of the light from the measurement target; and a selecting unit which, based on a light amount received by the light receiving portion at each of a plurality of wavelengths of the reflected light, selects a wavelength to be used to measure biological information from the plurality of wavelengths.

First claim

What is claimed is:

1 . A biological information measurement apparatus, comprising:
a light source configured to illuminate a measurement target with light; a light receiving portion configured to receive a light amount of reflected light of the light from the measurement target; and a selecting unit configured to, based on a light amount received by the light receiving portion at each of a plurality of wavelengths of the reflected light, select a wavelength to be used to measure biological information from the plurality of wavelengths.

2 . The apparatus according to claim 1 , further comprising a transmitting unit configured to transmit, to an external apparatus, the light amount detected by the light receiving portion for the light of the wavelength selected by the selecting unit.

3 . The apparatus according to claim 1 , further comprising a measuring unit configured to measure biological information based on the light amount of the reflected light of the wavelength selected by the selecting unit, the light amount being detected by the light receiving portion.

4 . The apparatus according to claim 1 , further comprising a spectrometer configured to divide the reflected light into luminous fluxes of the plurality of wavelengths,
wherein the light receiving portion includes a plurality of light receiving elements provided in correspondence with the luminous fluxes of the plurality of wavelengths and detects light amounts at a plurality of wavelengths using the plurality of light receiving elements.

5 . The apparatus according to claim 1 , wherein
the selecting unit includes an obtaining unit configured to obtain a light amount variation, which is a variation amount of the light amount detected by the light receiving portion at each of the plurality of wavelengths of the reflected light, and the selecting unit selects a wavelength to be used to measure biological information based on the light amount variation.

6 . The apparatus according to claim 5 , wherein the selecting unit selects the wavelength at which the light amount variation is the largest, or a wavelength included in a wavelength range of a predetermined width which includes the wavelength at which the light amount variation is the largest.

7 . The apparatus according to claim 5 , wherein the selecting unit selects a wavelength at which the light amount variation exceeds a predetermined threshold, and
the predetermined threshold is a value larger than a light amount variation obtained when the light source is off.

8 . The apparatus according to claim 7 , further comprising a setting unit configured to set the predetermined threshold based on the light amount variation measured while the light source is off.

9 . The apparatus according to claim 6 , further comprising a unit configured to perform statistical processing on the light amount at the selected wavelength.

10 . The apparatus according to claim 1 , wherein the light source is a white LED.

11 . The apparatus according to claim 1 , wherein if a light amount variation amount measured using a predetermined wavelength is smaller than a predetermined value, biological information is measured once again using the wavelength selected by the selecting unit.

12 . The apparatus according to claim 1 , wherein if a light amount variation amount at a predetermined wavelength among light amounts at a plurality of wavelengths received by the light receiving portion is smaller than a predetermined value, the biological information is measured once again using the wavelength selected by the selecting unit.

13 . The apparatus according to claim 11 , wherein the wavelength selected by the selecting unit is set as a wavelength for measurement for the next instance of measurement.

14 . The apparatus according to claim 1 , wherein
the light source has a plurality of light sources with different wavelengths of light to be output, the selecting unit selects a light source to be used to measure biological information from the plurality of light sources based on the light amount of the reflected light obtained by turning on each of the plurality of light sources, and the apparatus further comprises a measuring unit configured to measure biological information by turning on the light source selected by the selecting unit.

15 . The apparatus according to claim 14 , wherein if a light amount variation amount measured using a predetermined light source is smaller than a predetermined value, biological information is once again measured using the light source selected by the selecting unit.

16 . The apparatus according to claim 15 , wherein the light source selected by the selecting unit is set as a light source for the next instance of measurement.

17 . The apparatus according to claim 1 , wherein
the light receiving portion includes a plurality of light receiving portions that are sensitive to different wavelengths, the selecting unit selects a light receiving portion to be used to measure biological information from the plurality of light receiving portions based on the light amounts of the reflected light obtained from the plurality of light receiving portions, and the apparatus further comprises a measuring unit configured to measure biological information using the light receiving portion selected by the selecting unit.

18 . The apparatus according to claim 17 , wherein if a light amount variation amount measured using a predetermined light receiving portion is smaller than a predetermined value, biological information is once again measured using the light receiving portion selected by the selecting unit.

19 . The apparatus according to claim 17 , wherein the light receiving portion selected by the selecting unit is set as a light receiving portion for the next instance of measurement.

20 . The apparatus according to claim 3 , further comprising a display unit configured to display the biological information measured by the measuring unit.

21 . The apparatus according to claim 1 , further comprising an adjustment unit configured to, based on a value of a light amount output by the light receiving portion at the wavelength selected by the selecting unit, adjust a light amount of the light source.

22 . A biological information measurement system having a detection apparatus including a light source configured to illuminate a measurement target with light, and a light receiving portion configured to receive a light amount of reflected light of the light from the measurement target, and an information processing apparatus connected to the detection apparatus, the biological information measurement system comprising:
a selecting unit configured to, based on a light amount received by the light receiving portion at each of a plurality of wavelengths of the reflected light, select a wavelength to be used to measure biological information from the plurality of wavelengths; and a measuring unit configured to measure biological information based on the light amount of the reflected light of the wavelength selected by the selecting unit.

23 . A biological information measurement method, comprising:
illuminating a measurement target with light from a light source and obtaining a light amount received by a light receiving portion at each of a plurality of wavelengths of reflected light of the light from a measurement target; selecting a wavelength to be used to measure biological information from the plurality of wavele

Assignees

• Canon Kk

Inventors

• Kitamura Toshifumi

Classifications

• A61B5/02

  Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow · CPC title

• A61B5/02427 Primary

  Details of sensor · CPC title

• A61B5/0075 Primary

  by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy (A61B5/0071 takes precedence) · CPC title

• A61B5/0261

  using optical means, e.g. infrared light · CPC title

• A61B5/7278

  Artificial waveform generation or derivation, e.g. synthesizing signals from measured signals · CPC title