Smart watch and method for measuring heart rate

Patent metadata

Field	Value
Publication number	US-12465228-B2
Application number	US-202218082610-A
Country	US
Kind code	B2
Filing date	Dec 16, 2022
Priority date	Aug 28, 2018
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The present disclosure provides a smart watch and a method for measuring heart rate information. The smart watch includes a dial, a watchband, and a processing device disposed on the dial or inside the watchband. The processing device includes an optical emitter configured to emit light; an optical receiver configured to receive reflected light, the reflected light being generated by the light emitted by the optical emitter irradiating a skin for conversion into an electrical signal; and a processor configured to process the electrical signal to obtain heart rate information of a user.

First claim

What is claimed is:

1 . A smart watch, comprising:
a dial; a watchband connected to the dial; and a processing device disposed on the dial or inside the watchband; wherein the processing device comprises: an optical emitter configured to emit light; an optical receiver configured to receive reflected light, the reflected light being generated by the light emitted by the optical emitter irradiating a skin for conversion into an electrical signal; a processor connected to the optical emitter and the optical receiver, respectively, configured to process the electrical signal to obtain heart rate information of a user; an accelerometer sensor configured to detect and obtain motion information of the user, wherein the motion information comprises at least one of: direction information of the user, location information of the user, and speed variation rate of the user; and a gyroscope sensor configured to detect and obtain angular velocity information of the user; wherein the processor is connected to the accelerometer sensor and the gyroscope sensor, respectively; the accelerometer sensor is configured to send the motion information to the processor; the gyroscope sensor is configured to send the angular velocity information to the processor; and the processor is configured to: receive the motion information and the angular velocity information; generate motion-tolerant heart rate information by combining the motion information and the angular velocity information with the heart rate information; and control the smart watch to send a second reminder message in response to the motion-tolerant heart rate information exceeding a first threshold; or, control the smart watch to send a second reminder message in response to the motion-tolerant heart rate information exceeding a second threshold for a predetermined period of time, wherein the first threshold and the second threshold are the same or different, and the second reminder message is configured for reminding the user of the motion-tolerant heart rate information.

2 . The smart watch according to claim 1 , wherein the processor is configured to control the smart watch to send a first reminder message based on the heart rate information, the first reminder message being configured for reminding the user of the heart rate information.

3 . The smart watch according to claim 1 , wherein the processor is further configured to:
use the heart rate information together with the motion information and the angular velocity information as input to a PhotoPlethysmoGraphy (PPG) algorithm; and generate the motion-tolerant heart rate information by: processing the heart rate information, the motion information, and the angular velocity information using the PPG algorithm, and superimposing the processed information onto a PPG waveform.

4 . The smart watch according to claim 1 , further comprising:
a blood vessel information collecting device disposed in the watchband and configured to collect blood vessel information from an inner side of a wrist of the user; wherein the processing device is connected with the blood vessel information collecting device and is configured to receive and process the blood vessel information to obtain heart rate information of the user; and the blood vessel information collecting device comprises: a transmitting optical fiber disposed in the watchband having an input end and an output end; a receiving optical fiber disposed in the watchband having a receiving end and a transmitting end; a fixing device configured to fix the output end of the transmitting optical fiber and the receiving end of the receiving optical fiber; and wherein the input end is connected to the processing device, the output end is connected to the fixing device, the receiving end is connected to the fixing device, and the transmitting end is connected to the processing device.

5 . The smart watch according to claim 4 , wherein the fixing device comprises:
a fixing plate disposed on a surface of the watchband facing the wrist skin, the fixing plate provided with a plurality of through holes; a fixing ring; and wherein the output end of the transmitting optical fiber and the receiving end of the receiving optical fiber are configured to extend through the plurality of through holes respectively and be fixed by the fixing ring.

6 . The smart watch according to claim 5 , wherein the fixing device further comprises:
a diffusing device disposed on a surface of the fixing plate facing the skin, the diffusing device being configured to correspond to a position of the transmitting optical fiber, and being configured to increase an exit angle of an infrared light output from the transmitting optical fiber; and a fixing block configured to connect the diffusing device to the fixing plate.

7 . The smart watch according to claim 6 , wherein the diffusing device comprises an antistatic layer, a polyethylene terephthalate layer, and a diffusion layer which are sequentially stacked.

8 . The smart watch according to claim 5 , wherein the fixing device further comprises:
a spotlight device disposed on a surface of the fixing plate facing the skin, the spotlight device being configured to correspond to a position of the receiving optical fiber, and being configured to improve an angle of a reflected light received by the receiving optical fiber; and a fixing block configured to connect the spotlight device to the fixing plate.

9 . The smart watch according to claim 5 , wherein the fixing device further comprises:
a diffusing device disposed on a surface of the fixing plate facing the skin, the diffusing device being configured to correspond to a position of the transmitting optical fiber, and being configured to increase an exit angle of an infrared light output from the transmitting optical fiber; a spotlight device disposed on the surface of the fixing plate facing the skin, the spotlight device being configured to correspond to a position of the receiving optical fiber, and being configured to increase an angle of a reflected light received by the receiving optical fiber; and a fixing block configured to connect the diffusing device and the spotlight device to the fixing plate, respectively.

10 . The smart watch according to claim 4 , wherein the fixing device comprises:
a fixing plate disposed inside the watchband; and a fixing band configured to fix the output end of the transmitting optical fiber and the receiving end of the receiving optical fiber on the fixing plate.

11 . The smart watch according to claim 10 , wherein the output end of the transmitting optical fiber is oppositely disposed with the receiving end of the receiving optical fiber.

12 . The smart watch according to claim 11 , wherein both an end face of the output end of the transmitting optical fiber and an end face of the receiving end of the receiving optical fiber are perpendicular to a plane of the fixing plate.

13 . The smart watch according to claim 10 , wherein the fixing device further comprises a reflector plate disposed between the output end of the transmitting optical fiber and the receiving end of the receiving optical fiber.

14 . The smart watch according to claim 10 , wherein, in the output end of the transmitting optical fiber and the receiving end of the receiving optical fiber, an optical fiber wall on the side away from the skin is longer than an optical fiber wall on the side adjacent to the skin.

15 . A method for measuring heart rate information using the smart watch according to claim 4 , comprising:
generating, by the pr

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Tieshi
• Gao Xueling
• Xu Zhiqiang

Classifications

• G04G9/007

  combined with a calculator or computing means · CPC title

• G02B6/424

  Mounting of the optical light guide · CPC title

• A61B5/681

  Wristwatch-type devices · CPC title

• A61B2562/0219

  Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches · CPC title

• G04G21/025 Primary

  for measuring physiological data · CPC title