# US 9,039,627 B2 · Monitoring device with an accelerometer, method and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,627 B2 - Document ID: US9039627B2 - Status: Granted - Kind: B2 - Application number: 13/775,247 - Filed: 2013-02-24 - Published: 2013-07-11 - Granted: 2015-05-26 - Earliest claimed: 2010-07-28 - Assignees: Impact Sports Technologies, Inc. - Applicants: Impact Sports Technologies, Inc. - Inventors: Nikolai Rulkov; Mark Hunt; Donald Bradu - Web page: https://patentgrep.com/patent/US9039627B2 ## CPC - A61B 5/02416: {using photoplethysmograph signals, e.g. generated by infrared radiation (A61B5/14552 takes precedence)} - A61B 5/02438: {with portable devices, e.g. worn by the patient} - A61B 5/4866: {Evaluating metabolism (using breath test A61B5/083)} - A61B 5/681: {Wristwatch-type devices} - 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} - 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} - A61B 5/742: {using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339)} - A61B 2560/0242: adapted to measure environmental factors, e.g. temperature, pollution - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## 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 ### Claim 1 A device for monitoring a real-time heart rate of a user, the device comprising: an article configured to be attached to a 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) The device according to claim 1 wherein the article is configured to be attached to an arm of the user. ### Claim 4 (depends on 1) The device according to claim 1 further comprising a transceiver for transmitting the real-time heart rate from the article. ### Claim 5 (depends on 1) The device according to claim 1 further comprising a display for displaying the real-time heart rate value. ### Claim 6 A device for monitoring a real-time heart rate of a user, the device comprising: an article configured to be attached to a 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. ### Claim 7 (depends on 6) 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. ### Claim 8 (depends on 6) The device according to claim 6 wherein the article is configured to be attached to an arm of the user. ### Claim 9 (depends on 6) The device according to claim 6 further comprising a transceiver for transmitting the real-time heart rate from the article. ### Claim 10 (depends on 6) The device according to claim 6 further comprising a display for displaying the real-time heart rate value.