Monitoring Device With An Accelerometer, Method And System

• US 20130178754A1
• Filed: 02/24/2013
• Published: 07/11/2013
• Est. Priority Date: 07/28/2010
• Status: Active Grant

• Current Assignee: Yukka Magic LLC
• Original Assignee: Impact Sports Technologies Incorporated
• Inventors: Rulkov, Nikolai, Hunt, Mark, Bradu, Donald
• Granted Patent: US 9,039,627 B2
• Time in Patent Office: Days
• US Class Current: 600/508
• CPC Class Codes: A61B 2560/0242 adapted to measure environmental factors, e.g. temperature, pollution
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/4866 Evaluating metabolism A61B5/083 takes precedence
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
• CPC Class Codes: A61B 5/7296 for compensation of signal variation due to stress unintentionally induced in the patient, e.g. due to the stress of the medical environment or examination deliberately inducing physiological or psychological stress A61B5/4884
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

A monitoring device for monitoring the vital signs of a user is disclosed herein. The monitoring device is preferably comprises an article, an optical sensor, an accelerometer and processor. The optical sensor preferably comprises a photodetector and a plurality of light emitting diodes. A sensor signal from the optical sensor is processed with a filtered accelerometer output signal from the accelerometer to create a filtered vital sign signal used to generate a real-time vital sign for a user.

Claims

1. A device for monitoring a real-time heart rate of a user, the device comprising:

an article attached to the user;

an optical sensor connected to the article, the optical sensor configured to generate a real-time digitized optical signal corresponding to a flow of blood through tissue of the user, the optical sensor comprising a photodetector, a first LED emitting a green light, a second LED emitting a green light, and a light barrier, the light barrier preventing the photodetector from receiving direct light from the first LED or the second LED;

an accelerometer connected to the article, the accelerometer generating a real-time accelerometer data comprising a X-axis signal, a Y-axis signal and a Z-axis signal based on a movement of the user; and

a processor configured to receive the real-time digital signal from the optical sensor and configured to receive the real-time accelerometer data from the accelerometer, the processor configured to generate a period of motion filter value from the real-time accelerometer data utilizing an array of filters, and the processor configured to generate a real-time heart rate for the user based on the real-time digital signal filtered by suppressing the period of motion filter value and a heart rate filter value.

2. The device according to claim 1 wherein the processor determines a real-time heart rate of the user by generating a first heart rate value from a first filtered pulse data value which is generated from subtracting an average value of a second set of sample data values from an average value of a first set of sample data values, and wherein the processor uses a cascade adaptive resonant filter to generate subsequent heart rate values.

3. The device according to claim 1 wherein the article is attaché

dot an arm of the user.

4. The device according to claim 1 further comprising a transceiver for transmitting the real-time heart rate from the article.

5. The device according to claim 1 further comprising a display for displaying the real-time heart rate value.

6. A device for monitoring a real-time heart rate of a user, the device comprising:

an article attached to the user;

an optical sensor connected to the article, the optical sensor configured to generate a real-time digitized optical signal corresponding to a reflected light from a flow of blood through tissue of the user, the optical sensor comprising a photodetector, a first LED emitting a green light, a second LED emitting a green light, and a light barrier, the light barrier preventing the photodetector from receiving direct light from the first LED or the second LED;

an accelerometer connected to the article, the accelerometer generating a real-time accelerometer data comprising a X-axis signal, a Y-axis signal and a Z-axis signal based on a movement of the user; and

a processor configured to receive the real-time digital signal from the optical sensor and configured to receive the real-time accelerometer data from the accelerometer, the processor configured to generate to generate a real-time heart rate for the user based on the real-time digital signal filtered by suppressing a period of motion filter value generated from the real-time accelerometer data and a heart rate filter value.

7. The device according to claim 6 wherein the processor determines a real-time heart rate of the user by generating a first heart rate value from a first filtered pulse data value which is generated from subtracting an average value of a second set of sample data values from an average value of a first set of sample data values, and wherein the processor uses a cascade adaptive resonant filter to generate subsequent heart rate values.

8. The device according to claim 6 wherein the article is attaché

dot an arm of the user.

9. The device according to claim 6 further comprising a transceiver for transmitting the real-time heart rate from the article.

10. The device according to claim 6 further comprising a display for displaying the real-time heart rate value.