Granted Patent B2

US 12,268,487 · App. 17/790,900 · Granted Apr 8, 2025

Inventors: Xiaocai Shan (Shenzhen, CN); Hongbao Li (Shenzhen, CN); Yixin Chen (Shenzhen, CN); Jie Zhang (Shenzhen, CN); Xi Huang (Shenzhen, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

A61B5/02416A61B5/7221A61B5/7275A61B5/7282G16H10/60A61B5/02A61B5/02438A61B2560/0209

Abstract

Claims (72)

1. A method for controlling an electronic device to perform photoplethysmography detection comprising:

obtaining historical detection data of a sensor of the electronic device, wherein the sensor is a photoplethysmography sensor disposed in the electronic device, the photoplethysmography sensor comprises a plurality of light sources and at least one photoelectric sensing element, and each light source has a corresponding photoelectric sensing element;

calculating a confidence of the historical detection data;

determining, based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained; and

determining that a photoelectric sensing element to be turned on in the next detection time segment is a photoelectric sensing element corresponding to the determined light source to be turned on.

2. The method according to claim 1 , wherein obtaining the historical detection data of the photoplethysmography sensor comprises:

obtaining detection data from the photoplethysmography sensor in a detection time segment closest in time to the next detection time segment.

3. The method according to claim 1 , wherein calculating the confidence of the historical detection data comprises:

calculating, based on the historical detection data, a probability that a detected event occurs to a user of the electronic device; and

calculating the confidence of the historical detection data based on the probability that the detected event occurs to the user, wherein if the probability that the detected event occurs to the user is closer to 0 or 1, the confidence is higher.

4. The method according to claim 3 , wherein calculating, based on the historical detection data, the probability that the detected event occurs to the user of the electronic device comprises calculating, by using the following formula, the probability that the detected event occurs to the user:

p= 1/(1+ e {circumflex over ( )}(−α{circumflex over ( )} Tf )); and

wherein calculating the confidence of the historical detection data based on the probability that the detected event occurs to the user comprises calculating, by using the following formula, the confidence of the historical detection data:

c= 2×abs(0.5− p ),

wherein c is a confidence calculation result, f is a feature related to atrial fibrillation detection, α is a weight matrix corresponding to the feature related to atrial fibrillation detection, e is the base of the natural logarithm, and p represents a possibility that the data is atrial fibrillation.

5. The method according to claim 1 , wherein determining, based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained comprises:

determining whether the confidence of the historical detection data is greater than a predetermined threshold; and

determining, based on the calculated confidence being greater than the predetermined threshold, that the light source to be turned on by the photoplethysmography sensor in the next detection time segment comprises only the light source turned on when the historical detection data is obtained; or

determining, based on the confidence not being greater than the predetermined threshold, that the light source to be turned on by the photoplethysmography sensor in the next detection time segment comprises the light source turned on when the historical detection data is obtained and the different light source.

6. The method according to claim 1 , further comprising:

obtaining regular information, wherein the regular information comprises at least one of user information, motion information, and a current measurement time of the electronic device, and wherein the user information comprises at least one of physical health information, age information, and gender information of the user.

7. The method according to claim 6 , wherein determining, based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained comprises:

determining, based on the regular information and the confidence of the historical detection data, whether the light source to be turned on by the photoplethysmography sensor in the next detection time segment comprises the light source different from the light source turned on when the historical detection data is obtained.

8. The method according to claim 6 , further comprising:

determining whether an initialization condition of the photoplethysmography sensor is met; and

determining, based on the regular information if the initialization condition is met, an initial light source and an initial photoelectric sensing element that are to be turned on by the photoplethysmography sensor.

9. The method according to claim 8 , wherein the initialization condition comprises any one of the following:

the electronic device is used by the user for a first time;

a time point for switching between a day mode and a night mode of the photoplethysmography sensor is reached; and

the electronic device performs a data update.

10. The method according to claim 8 , wherein determining, based on the regular information if the initialization condition is met, the initial light source and the initial photoelectric sensing element that are to be turned on by the photoplethysmography sensor comprises:

calculating, by using the following formulas, a quantity of initial light sources to be turned on by the photoplethysmography sensor:

r= 1/(1+ e {circumflex over ( )}(−θ{circumflex over ( )} Tx )); and

b =Ceil( r×n );

wherein r represents a health risk such that a higher value of r indicates a higher health risk of the user, x is a vector that represents a health risk parameter, θ is a matrix that represents a weight of impact of the health risk parameter on health, e is the base of the natural logarithm, b represents a calculated quantity of light sources to be turned on, and n represents a maximum quantity of light sources supported by the device; and

determining that the initial photoelectric sensing element to be turned on is a photoelectric sensing element corresponding to the determined initial light source to be turned on.

11. A method for photoplethysmography detection, the method comprising:

obtaining, by a first electronic device, historical detection data of a photoplethysmography sensor from a second electronic device, wherein the second electronic device comprises a photoplethysmography sensor, the photoplethysmography sensor comprises a plurality of light sources and at least one photoelectric sensing element, and each light source has a corresponding photoelectric sensing element;

calculating, by the first electronic device, a confidence of the historical detection data;

determining, by the first electronic device based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor of the second electronic device in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained;

determining, by the first electronic device, that a photoelectric sensing element to be turned on by the photoplethysmography sensor of the second electronic device in the next detection time segment is a photoelectric sensing element corresponding to the determined light source to be turned on; and

sending, by the first electronic device to the second electronic device, information about the light source to be turned on and information about the photoelectric sensing element to be turned on.

12. The method according to claim 11 , wherein obtaining, by the first electronic device, the historical detection data of the photoplethysmography sensor from the second electronic device comprises:

obtaining, by the first electronic device from the second electronic device, detection data detected by the photoplethysmography sensor of the second electronic device in a detection time segment closest in time to the next detection time segment of the second electronic device.

13. The method according to claim 11 , wherein calculating, by the first electronic device, the confidence of the historical detection data comprises:

calculating, by the first electronic device based on the historical detection data, a probability that a detected event occurs to a user of the electronic device; and

calculating, by the first electronic device, the confidence of the historical detection data based on the probability that the detected event occurs to the user, wherein if the probability that the detected event occurs to the user is closer to 0 or 1, the confidence is larger.

14. The method according to claim 11 , wherein determining, by the first electronic device based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained comprises:

determining, by the first electronic device, whether the confidence of the historical detection data is greater than a predetermined threshold; and

determining, based on the confidence being greater than the predetermined threshold, by the first electronic device, that the light source to be turned on by the photoplethysmography sensor in the next detection time segment comprises only the light source turned on when the historical detection data is obtained; or

determining, based on the confidence not being greater than the predetermined threshold, by the first electronic device, that the light source to be turned on by the photoplethysmography sensor in the next detection time segment comprises the light source turned on when the historical detection data is obtained and the different light source.

15. The method according to claim 11 , further comprising:

obtaining, by the first electronic device, regular information, wherein the regular information comprises at least one of user information, motion information, and a current measurement time of the electronic device, and wherein the user information comprises at least one of physical health information, age information, and gender information of the user.

16. The method according to claim 15 , wherein the determining, by the first electronic device based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained comprises:

determining, by the first electronic device, based on the regular information and the confidence of the historical detection data, whether the light source to be turned on by the photoplethysmography sensor in the next detection time segment comprises the light source different from the light source turned on when the historical detection data is obtained.

17. The method according to claim 15 , further comprising:

determining, by the first electronic device, whether an initialization condition of the photoplethysmography sensor is met; and

determining, by the first electronic device, based on the regular information if the initialization condition is met, an initial light source and an initial photoelectric sensing element that are to be turned on by the photoplethysmography sensor.

18. The method according to claim 17 , wherein the initialization condition comprises any one of the following:

the electronic device is used by the user for a first time;

a time point for switching between a day mode and a night mode of the photoplethysmography sensor is reached; and

the electronic device performs a data update.

19. An electronic device, comprising:

one or more processors;

a photoplethysmography sensor, wherein the photoplethysmography sensor comprises a plurality of light sources and at least one photoelectric sensing element, and wherein each light source has a corresponding photoelectric sensing element; and

a non-transitory computer-readable storage medium storing a program to be executed by the one or more processors, the program including instructions for:

obtaining historical detection data of the photoplethysmography sensor;

calculating a confidence of the historical detection data;

determining, based on the calculated confidence of the historical detection data, whether a light source to be turned on by the photoplethysmography sensor in a next detection time segment comprises a light source different from a light source turned on when the historical detection data is obtained; and

determining that a photoelectric sensing element to be turned on in the next detection time segment is a photoelectric sensing element corresponding to the determined light source to be turned on.

20. The electronic device according to claim 19 , wherein the electronic device is further enabled to perform:

obtaining detection data detected by the photoplethysmography sensor in a detection time segment closest in time to the next detection time segment.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (54)