Monitoring device with an accelerometer, method and system

• US 8,460,199 B2
• Filed: 12/07/2011
• Issued: 06/11/2013
• Est. Priority Date: 07/28/2010
• Status: Expired due to Fees

• Current Assignee: Impact Sports Technologies Incorporated
• Original Assignee: Impact Sports Technologies Incorporated
• Inventors: Rulkov, Nikolai, Hunt, Mark, Brady, Donald
• Primary Examiner(s): Mallari, Patricia
• Assistant Examiner(s): D'ANGELO, MICHAEL J
• Application Number:
  US13/314,149
• Publication Number:
  US 20120245472A1
• Time in Patent Office: 552 Days
• Field of Search: 600/301, 600/309, 600/481, 600/483, 600/500, 600502-504
• US Class Current: 600/503
• CPC Class Codes: A61B 2560/0242 adapted to measure environmental factors, e.g. temperature, pollution
• 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 5/7296 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

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 vital sign of a user, the device comprising:

an article attached to the user;

an optical sensor for generating a real-time digitized optical signal corresponding to a flow of blood through an artery 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 Comb filter value from the real-time accelerometer data utilizing an array of Comb filters, 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 Comb filter value and a heart rate Comb filter value.

2. The device according to claim 1 wherein the array of Comb filters comprises a four-cycle Comb filter.

3. 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.