Biosignal measuring apparatus and method of measuring biosignal

• US 9,662,032 B2
• Filed: 09/25/2012
• Issued: 05/30/2017
• Est. Priority Date: 09/26/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Ko, Byung-hoon, Lee, Tak-hyung
• Primary Examiner(s): Stout, Michael C
• Application Number:
  US13/626,125
• Publication Number:
  US 20130079619A1
• Time in Patent Office: 1,708 Days
• Field of Search: 600393-397, 600546-547
• CPC Class Codes: A61B 2562/0217 Electrolyte containing
• CPC Class Codes: A61B 5/259 using conductive adhesive means, e.g. gels
• CPC Class Codes: A61B 5/304 Switching circuits
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/7214 using signal cancellation, e.g. based on input of two identical physiological sensors spaced apart, or based on two signals derived from the same sensor, for different optical wavelengths

Abstract

A biosignal measuring apparatus and a method of measuring a biosignal is provided. A biosignal measuring apparatus includes a first interfacing unit including two or more first interfaces configured to detect first signals from a subject, a second interfacing unit including two or more second interfaces and a connecting unit, the second interfaces being configured to detect noise from the subject, the connecting unit being configured to connect the second interfaces, and a biosignal extracting unit configured to extract a biosignal of the subject from the first signals by using signals output from the second interfacing unit.

Claims

1. A biosignal measuring apparatus, comprising:

a first interfacing unit comprising two or more first interfaces configured to detect first signals, which comprises a biosignal and a noise signal, from a subject;

a second interfacing unit comprising two or more second interfaces and a connecter, the second interfaces being configured to detect the noise signal from the subject, the connecter being configured to electrically connect the two or more second interfaces; and

a biosignal extractor comprising;

a first differential amplifier configured to perform differential amplification on the first signals to output a first result, and

a second differential amplifier configured to perform differential amplification on the noise signal from the second interfaces unit to output a second result,

wherein the biosignal extractor is configured to extract the biosignal of the subject by removing the second result from the first result.

2. The apparatus of claim 1, wherein the connecter is further configured to short-circuit the second interfaces.

3. The apparatus of claim 1, wherein the second interfaces comprise electrolytes, and

wherein the connecter comprises an electrolyte configured to connect the electrolytes of the second interfaces.

4. The apparatus of claim 3, wherein the electrolytes are hydrogels.

5. The apparatus of claim 1, wherein the second interfaces comprise electrolytes, and

wherein the connecter comprises a metal configured to connect the electrolytes of the second interfaces.

6. The apparatus of claim 5, wherein the electrolytes are hydrogels.

7. The apparatus of claim 1, wherein the first interfacing unit and the second interfacing unit are attached to a pad.

8. A biosignal measuring apparatus, comprising:

a first interfacing unit comprising two or more first interfaces configured to detect first signals, which comprises a biosignal and a noise signal, from a subject;

a second interfacing unit comprising two or more second interfaces and a connecter, the second interfaces being configured to detect the noise signal from the subject, the connecter being configured to electrically connect the two or more second interfaces; and

a biosignal extractor comprising;

a first differential amplifier configured to perform differential amplification on the first signals,

a second differential amplifier configured to perform differential amplification on the signals output from the second interfacing unit,

an adaptive filter configured to adaptively filter a signal output from the second differential amplifier based on a feedback from an adder, and

the adder is configured to remove the adaptively filtered signal from a signal output from the first differential amplifier.

12. The apparatus of claim 8, wherein the adaptive filter is further configured to update a filter coefficient based on an artifact reduction percentage (ARP), a noise reduction ratio, and an SNR of the extracted biosignal.

9. A biosignal measuring apparatus, comprising:

a first interfacing unit comprising two or more first interfaces configured to detect first signals, which comprises a biosignal and a noise signal, from a subject;

a second interfacing unit comprising two or more second interfaces configured to detect the noise signal from the subject, a distance between the second interfaces being less than a distance between the first interfaces; and

a biosignal extractor comprising;

a first differential amplifier configured to perform differential amplification on the first signals to output a first result, and

a second differential amplifier configured to perform differential amplification on the noise signal from the second interfaces unit to output a second result,

wherein the biosignal extractor is configured to extract the biosignal of the subject by removing the second result from the first result.

10. The apparatus of claim 9, wherein the first interfacing unit and the second interfacing unit are attached to a pad.

11. A method of measuring a biosignal, the method comprising:

detecting first signals, which comprises a biosignal and a noise signal, from a subject based on an eleventh interface and a twelfth interface;

detecting the noise signal from the subject based on a twenty-first interface and a twenty-second interface connected to the twenty-first interface;

performing first differential amplification on the first signals, the first differential amplification outputting a first result;

performing second differential amplification on the noise signal output from the twenty-first interface and the twenty-second interface, the second differential amplification outputting a second result; and

extracting the biosignal of the subject from the first signals by removing the second result from the first result.