BIOSIGNAL MEASURING APPARATUS AND METHOD OF MEASURING BIOSIGNAL

• US 20130079619A1
• Filed: 09/25/2012
• Published: 03/28/2013
• Est. Priority Date: 09/26/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Byung-Hoon Ko, Tak-Hyung Lee
• Inventors: Lee, Tak-hyung, Ko, Byung-hoon
• Granted Patent: US 9,662,032 B2
• Time in Patent Office: Days
• US Class Current: 600/393
• 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 from a subject;

a second interfacing unit comprising 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.

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

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

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

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

wherein the connecting unit 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. The apparatus of claim 1, wherein the first signals are outputted from the first interfacing unit, and

wherein the biosignal extracting unit is further configured to remove a result obtained from performing differential amplification on the outputted signals from the second interfacing unit from a result obtained from performing differential amplification on the outputted first signals to extract the biosignal from the first signals.

9. The apparatus of claim 8, wherein the biosignal extracting unit comprises a first differential amplifier, a second differential amplifier, an adaptive filter, and an adder, the first differential amplifier being configured to perform differential amplification on the outputted first signals, the second differential amplifier being configured to perform differential amplification on the outputted signals from the second interfacing unit, the adaptive filter being configured to adaptively filter a signal output from the second differential amplifier based on the extracted biosignal, the adder being configured to remove the adaptively filtered signal from a signal output from the first differential amplifier.

10. The apparatus of claim 1, wherein, to extract the biosignal from the first signals, the biosignal extracting unit is further configured to remove a signal output from a twenty-first interface of the second interfaces from a signal output from an eleventh interface of the first interfaces, remove a signal output from a twenty-second interface of the second interfaces from a signal output from a twelfth interface of the first interfaces, and perform differential amplification on signals generated as a result of the removed signal of the twenty-first interface and the removed signal of the twenty-second interface.

11. The apparatus of claim 10, wherein the biosignal extracting unit comprises a first adaptive filter, a first adder, a second adaptive filter, a second adder, and a differential amplifier, the first adaptive filter being configured to adaptively filter the signal output from the twenty-first interface based on the extracted biosignal, the first adder being configured to remove an signal output from the first adaptive filter from the signal output from the eleventh interface, the second adaptive filter being configured to adaptively filter the signal output from the twenty-second interface based on the extracted biosignal, the second adder being configured to remove a signal output from the second adaptive filter from the signal output from the twelfth interface, the differential amplifier configured to perform differential amplification on a signal output from the first adder and a signal output from the second adder.

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

12. A biosignal measuring apparatus, comprising:

a first interfacing unit comprising two or more first interfaces configured to detect first signals from a subject;

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

13. The apparatus of claim 12, wherein the first interfacing unit and the second interfacing unit are attached to a pad.

14. A biosignal measuring apparatus, comprising:

an interfacing unit comprising two or more interfaces and a first switching device configured to switch a connection state between the interfaces;

a control unit configured to control the first switching device to switch the connection state between the interfaces; and

a biosignal extracting unit configured to extract a biosignal of the subject by using signals output from the interfacing unit according to the connection state of the controlled first switching device.

15. The apparatus of claim 14, wherein the interfacing unit is configured to detect first signals when the control unit outputs a first control signal configured to open the first switching device.

16. The apparatus of claim 15, wherein the interfacing unit is configured to detect noise signals when the control unit outputs a second control signal configured to short-circuit the first switching device.

17. The apparatus of claim 16, wherein the detected first signals and the detected noise signals are outputted from the interfacing unit,

wherein the biosignal extracting unit comprises a second switching device,

wherein the control unit is further configured to output a third control signal configured to control the second switching device, and

wherein, to extract the biosignal of the subject, the biosignal extracting unit is further configured to remove a result obtained from performing differential amplification on the outputted noise signals from a result obtained from performing differential amplification on the outputted first signals according to a switching result of the controlled second switching device.

18. The apparatus of claim 17, wherein the biosignal extracting unit further comprises a first differential amplifier, a second differential amplifier, an adaptive filter, and an adder, the first differential amplifier being configured to perform differential amplification on the outputted first signals, the second differential amplifier being configured to perform differential amplification on the outputted noise signals, the adaptive filter being configured to adaptively filter a signal output from the second differential amplifier based on the extracted biosignal, the adder being configured to remove the adaptively filtered signal from a signal output from the first differential amplifier.

19. The apparatus of claim 16, wherein the detected first signals and the detected noise signals are outputted from the interfacing unit,

wherein the biosignal extracting unit comprises a third switching device,

wherein the control unit is further configured to output a third control signal configured to control the third switching device, and

wherein, to extract the biosignal of the subject, the biosignal extracting unit is further configured to remove the outputted noise signals from the outputted first signals according to a switching result of the controlled third switching device, and perform differential amplification on signals generated as a result of the removal of the outputted noise signals from the outputted first signals.

20. The apparatus of claim 19, wherein the biosignal extracting unit further comprises a first adaptive filter, a first adder, a second adaptive filter, a second adder, and a differential amplifier, the first adaptive filter being configured to adaptively filter a signal output from an eleventh interface of the interfaces based on the extracted biosignal as the first switching device is closed, the first adder being configured to remove a signal output from the first adaptive filter from a signal output from the eleventh interface as the first switching device is opened, the second adaptive filter being configured to adaptively filter a signal output from a twelfth interface of the interfaces based on the extracted biosignal as the first switching device is closed, the second adder being configured to remove a signal output from the second adaptive filter from a signal output from the twelfth interface as the first switching device is opened, the differential amplifier being configured to perform differential amplification on a signal output from the first adder and a signal output from the second adder.

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

detecting first signals from a subject based on an eleventh interface and a twelfth interface;

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

extracting a biosignal of the subject from the first signals by using signals output from the twenty-first interface and the twenty-second interface based on the detected noise.

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

outputting a first control signal, the first control signal being configured to control a switching device to have an open connection state between an eleventh interface and a twelfth interface;

detecting first signals from a subject according to the outputted first control signal;

outputting a second control signal, the second control signal being configured to control the switching device to have a short-circuited connection state between the eleventh interface and the twelfth interface;

detecting noise from the subject according to the outputted second control signal; and

extracting a biosignal of the subject from the first signals by using the detected noise.