Biosignal measurement apparatus

• US 8,301,215 B2
• Filed: 06/29/2007
• Issued: 10/30/2012
• Est. Priority Date: 06/30/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Kanazawa University, Samsung Electronics Co. Ltd.
• Inventors: Yamakoshi, Kenichi, Shin, Kun Soo, Jung, Hye Jin, Lee, Jong Youn, Tanaka, Shinobu, Yamakoshi, Takehiro
• Primary Examiner(s): Winakur, Eric
• Assistant Examiner(s): Liu, Chu Chuan (JJ)
• Application Number:
  US11/819,923
• Publication Number:
  US 20080058623A1
• Time in Patent Office: 1,950 Days
• Field of Search: 600/310, 600322- 32, 600/340, 600/344, 600/473, 600/476, 600/481, 600500-503, 600322-324, 600/506
• US Class Current: 600/324
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6843 Monitoring or controlling sensor contact pressure

Abstract

A biosignal measurement apparatus including: a bracelet membrane to wear around a user'"'"'s wrist; a fixing supporter to install in a first side portion of the bracelet membrane and to support a first side portion of the wrist; a moving supporter to install in a second side portion of the bracelet membrane, to move towards the fixing supporter, and closely to attach to a second side portion of the wrist; and an information control unit to calculate a distance between the first side portion of the wrist and the second side portion of the wrist by detecting a movement distance of the moving supporter, and to calculate a displacement of the radial artery of the wrist by using a predetermined constant and the calculated distance between the first side portion of the wrist and the second side portion of the wrist.

Claims

1. A biosignal measurement apparatus comprising:

a bracelet membrane configured to be worn around a user'"'"'s wrist;

a fixing supporter installed in a first side portion of the bracelet membrane and configured to support a first side portion of the wrist;

a moving supporter installed in a second side portion of the bracelet membrane, configured to move towards the fixing supporter and closely attach to a second side portion of the wrist;

a sensor unit installed in the bracelet membrane and measuring the user'"'"'s biosignal from a radial artery; and

an information control unit to calculate a distance between the first side portion of the wrist and the second side portion of the wrist by detecting a movement distance of the moving supporter, and to calculate a displacement of the radial artery of the wrist by using a predetermined constant and the calculated distance between the first side portion of the wrist and the second side portion of the wrist.

2. The apparatus of claim 1, wherein the predetermined constant is set as a value between 0.1 and 0.2.

3. The apparatus of claim 1, wherein the moving supporter comprises a predetermined elastic element, and the moving supporter closely attaches to the second side portion of the wrist according to an elastic motion of the elastic element.

4. The apparatus of claim 1, wherein the information control unit calculates the distance between the first side portion of the wrist and the second side portion of the wrist by using both a distance between the fixing supporter and the moving supporter before the elastic motion of the elastic element is performed, and a displacement of the elastic element according to the elastic motion.

5. The apparatus of claim 1, wherein the moving supporter comprises a predetermined bolt element, and closely attaches to the second side portion of the wrist according to a rotational motion of the bolt element.

6. The apparatus of claim 5, wherein the information control unit calculates the distance between the first side portion of the wrist and the second side portion of the wrist by using both a distance between the fixing support and the moving support before the rotational motion of the bolt element is performed, and a number of rotations of the bolt element according to the rotational motion.

8. The apparatus of claim 1, wherein the displacement of the radial artery corresponds to a distance from the first side portion of the wrist to the location of the radial artery.

9. The apparatus of claim 1, further comprising:

a sensor actuator connected with the sensor unit and moving the sensor unit, wherein the information control unit actuates the sensor actuator by using the calculated displacement of the radial artery of the wrist, and moves the sensor unit towards the location of the radial artery.

11. The apparatus of claim 9, wherein the sensor unit comprises:

a pulse waveform sensor to measure the user'"'"'s pulse waveform from the radial artery.

12. The apparatus of claim 11, wherein the sensor unit comprises:

a luminous part to emit light toward the wrist respectively, and to measure an oxygen saturation level.

13. The apparatus of claim 11, wherein the sensor unit comprises:

a pressure sensor to measure the user'"'"'s blood pressure by measuring a pressure of the radial artery.

14. The apparatus of claim 12, wherein the luminous part comprises at least two light sources to emit a red light and an infrared ray towards the wrist respectively.

15. The apparatus of claim 3, wherein the elastic element is a spring.

16. The apparatus of claim 9, wherein the sensor actuator comprises a motor to move the sensor unit.

7. A biosignal measurement apparatus comprising:

a bracelet membrane configured to be worn around a user'"'"'s wrist;

a fixing supporter installed in a first side portion of the bracelet membrane and configured to support a first side portion of the wrist;

a moving supporter installed in a second side portion of the bracelet membrane, configured to move towards the fixing supporter and closely attach to a second side portion of the wrist;

an information control unit to calculate a distance between the first side portion of the wrist and the second side portion of the wrist by detecting a movement distance of the moving supporter, and to calculate a displacement of a radial artery of the wrist by using a predetermined constant and the calculated distance between the first side portion of the wrist and the second side portion of the wrist;

and a sensor unit installed in the bracelet membrane and measuring the user'"'"'s biosignal from the radial artery,

wherein the information control unit calculates the displacement of the radial artery of the wrist by multiplying the constant and the calculated distance between the first side portion of the wrist and the second side portion of the wrist.

10. A biosignal measurement apparatus comprising:

a bracelet membrane configured to be worn around a user'"'"'s wrist;

a fixing supporter to installed in a first side portion of the bracelet membrane and configured to support a first side portion of the wrist;

a moving supporter installed in a second side portion of the bracelet membrane, configured to move towards the fixing supporter, and closely attach to a second side portion of the wrist;

an information control unit to calculate a distance between the first side portion of the wrist and the second side portion of the wrist by detecting a movement distance of the moving supporter, and to calculate a displacement of a radial artery of the wrist by using a predetermined constant and the calculated distance between the first side portion of the wrist and the second side portion of the wrist;

a sensor unit installed in the bracelet membrane and measuring the user'"'"'s biosignal from the radial artery; and

a sensor actuator connected with the sensor unit and moving the sensor unit, wherein the information control unit actuates the sensor actuator by using the calculated displacement of the radial artery of the wrist, and moves the sensor unit towards the location of the radial artery, and

wherein the sensor unit comprises four sensor portions, wherein each sensor portions comprises;

a pulse waveform sensor to measure the user'"'"'s pulse waveform from the radial artery;

a luminous part to emit light toward the wrist respectively, and to measure an oxygen saturation level; and

a pressure sensor to measure the user'"'"'s blood pressure by measuring a pressure of the radial artery.