EP-4736753-A1 - BLOOD PRESSURE MEASUREMENT METHOD AND SYSTEM, ELECTRONIC DEVICE, AND MEDIUM

EP4736753A1EP 4736753 A1EP4736753 A1EP 4736753A1EP-4736753-A1

Abstract

This application relates to the field of blood pressure measurement, and discloses a blood pressure measurement method and system, an electronic device, and a medium. According to the blood pressure measurement method in this application, in a pressurization phase of blood pressure measurement, a real-time air pressure value of an air path connected to an air bladder is detected, and then an air valve drive circuit is controlled based on the real-time air pressure value. For example, when air pressure of the air bladder is low, a low drive voltage may be used to drive an air valve to operate; or when the air pressure of the air bladder is high, a high drive voltage may be used to drive the air valve to operate. In this case, compared with a manner of using a fixed high drive voltage to drive the air valve to operate, dynamically adjusting a drive voltage of the air valve in the pressurization process allows the air valve to complete operation with low power consumption while meeting a deflation amount requirement. As a result, overall power consumption of the blood pressure measurement system can be reduced by optimizing power consumption in each blood pressure measurement process, thereby prolonging a battery life of a wearable device and finally implementing long-term blood pressure monitoring.

Inventors

LI, WEINAN
Jin, Junye
WANG, YOUHUA

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240813

Claims (12)

A blood pressure measurement method, applied to an electronic device, wherein the electronic device comprises an air bladder and an air valve that are configured for blood pressure measurement, and the method comprises: when the electronic device enters a pressurization phase of blood pressure measurement, obtaining a real-time air pressure value in the air bladder; determining a real-time drive voltage of the air valve based on the real-time air pressure value and a first deflation condition; and driving, based on the real-time drive voltage, the air valve to operate.
The method according to claim 1, wherein determining the real-time drive voltage of the air valve based on the real-time air pressure value and the first deflation condition comprises: when the first deflation condition is that a deflation amount of the air valve is less than or equal to a first deflation amount, obtaining a correspondence between a voltage of the air valve and air pressure of the air bladder; determining, based on the correspondence between the voltage of the air valve and the air pressure of the air bladder, a voltage of the air valve corresponding to the real-time air pressure value; and determining the voltage of the air valve corresponding to the real-time air pressure value as the real-time drive voltage of the air valve.
The method according to claim 2, wherein in the correspondence between the voltage of the air valve and the air pressure of the air bladder, as the air pressure of the air bladder increases, the voltage of the air valve exhibits a trend of first decreasing and then increasing.
The method according to claim 1, wherein determining the real-time drive voltage of the air valve based on the real-time air pressure value and the first deflation condition comprises: when the first deflation condition is that a deflation amount of the air valve is greater than a second deflation amount, obtaining a real-time ideal air pressure value of the air bladder, wherein the real-time ideal air pressure value represents a corresponding air pressure value at which the air bladder meets a linear pressurization condition; and determining the real-time drive voltage of the air valve based on a real-time deviation value between the real-time ideal air pressure value and the real-time air pressure value.
The method according to claim 4, wherein the electronic device further comprises an air pump configured for blood pressure measurement; and determining the real-time drive voltage of the air valve based on the real-time deviation value between the real-time ideal air pressure value and the real-time air pressure value comprises: determining a real-time drive voltage of the air pump and the real-time drive voltage of the air valve based on the real-time deviation value by using a proportional-integral-derivative control algorithm.
The method according to claim 5, wherein the electronic device further comprises a first drive circuit configured to drive the air pump to operate, and the method further comprises: controlling, through a variable power supply control chip in the first drive circuit, a drive voltage of the air pump to be the real-time drive voltage of the air pump.
The method according to claim 4, wherein obtaining the real-time ideal air pressure value of the air bladder comprises: obtaining a linear pressurization curve, wherein the linear pressurization curve comprises ideal air pressure values corresponding to different moments; and determining, based on the linear pressurization curve, an ideal air pressure value corresponding to a current moment, to obtain the real-time ideal air pressure value.
The method according to claim 1, wherein the electronic device further comprises a sensor connected to the air bladder through an air path; and obtaining the real-time air pressure value in the air bladder comprises: detecting air pressure in the air bladder by using the sensor, to obtain the real-time air pressure value.
The method according to any one of claims 1 to 8, wherein the electronic device further comprises a second drive circuit configured to drive the air valve to operate; and driving, based on the real-time drive voltage, the air valve to operate comprises: controlling, through a variable power supply control chip in the second drive circuit, a drive voltage of the air valve to be the real-time drive voltage, so that the deflation amount of the air valve meets the first deflation condition.
A blood pressure measurement system, comprising an air bladder, an air valve, and a blood pressure measurement apparatus, wherein the blood pressure measurement apparatus is configured to: in a pressurization phase of blood pressure measurement, obtain a real-time air pressure value in the air bladder; determine a real-time drive voltage of the air valve based on the real-time air pressure value and a first deflation condition; and drive, based on the real-time drive voltage, the air valve to operate.
A readable medium, wherein the readable medium stores instructions, and when the instructions are executed on an electronic device, the electronic device is enabled to perform the blood pressure measurement method according to any one of claims 1 to 9.
An electronic device, wherein the electronic device comprises: a memory, configured to store instructions executed by one or more processors of the electronic device, and a processor, wherein the processor is one of the processors of the electronic device, and is configured to perform the blood pressure measurement method according to any one of claims 1 to 9.

Description

This application claims priority to Chinese Patent Application No. 202311199863.1, filed with the China National Intellectual Property Administration on September 15, 2023 and entitled "BLOOD PRESSURE MEASUREMENT METHOD AND SYSTEM, ELECTRONIC DEVICE, AND MEDIUM", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of blood pressure measurement technologies, and in particular, to a blood pressure measurement method and system, an electronic device, and a medium. BACKGROUND Currently, with the continuous development of technologies, wearable devices have become a part of people's life. People are no longer satisfied with simple monitoring of time and step count, but expect to use the wearable devices to detect their physical health indicators. For example, blood pressure, as a fundamental physiological indicator of a human body, is an important basis for assessing a plurality of diseases. Therefore, the wearable devices are generally integrated with blood pressure measurement systems. Different from a conventional cuff-type blood pressure monitor, a wearable blood pressure measurement device has higher requirements for both size and power consumption. Although an existing wearable blood pressure measurement device, such as a wrist-type blood pressure measurement device, can achieve a small size, a battery capacity and a battery life are significantly constrained, making it difficult to implement long-term continuous monitoring. Therefore, it is necessary to reduce power consumption of the wearable blood pressure measurement device to implement a long battery life or even an ultra-long battery life. SUMMARY Embodiments of this application provide a blood pressure measurement method and system, an electronic device, and a medium. According to a first aspect, an embodiment of this application provides a blood pressure measurement method, applied to an electronic device. The electronic device includes an air bladder and an air valve that are configured for blood pressure measurement. The method includes: When the electronic device enters a pressurization phase of blood pressure measurement, the electronic device obtains a real-time air pressure value in the air bladder; determines a real-time drive voltage of the air valve based on the real-time air pressure value and a first deflation condition; and drives, based on the real-time drive voltage, the air valve to operate. It may be understood that in this application, in a pressurization phase of blood pressure measurement, a sensor detects the real-time air pressure value in the air bladder, and then an air valve drive circuit is controlled based on the real-time air pressure value, so that a real-time drive voltage applied by the air valve drive circuit to the air valve corresponds to the real-time air pressure value. For example, when air pressure of the air bladder is low, a low drive voltage may be used to drive the air valve to operate, or when the air pressure of the air bladder is high, a high drive voltage may be used to drive the air valve to operate. The real-time drive voltage may be a minimum drive voltage that allows the air valve to meet the first deflation condition (for example, a deflation amount is 0). In this way, a drive voltage of the air valve is dynamically adjusted in the pressurization process, so that the air valve can complete operation with low power consumption while still meeting the first deflation condition. In this way, a battery life of the electronic device can be prolonged by optimizing power consumption in each blood pressure measurement process, thereby implementing long-term blood pressure monitoring. In a possible implementation of the first aspect, determining the real-time drive voltage of the air valve based on the real-time air pressure value and the first deflation condition includes: when the first deflation condition is that a deflation amount of the air valve is less than or equal to a first deflation amount, obtaining a correspondence between a voltage of the air valve and air pressure of the air bladder; determining, based on the correspondence between the voltage of the air valve and the air pressure of the air bladder, a voltage of the air valve corresponding to the real-time air pressure value; and determining the voltage of the air valve corresponding to the real-time air pressure value as the real-time drive voltage of the air valve. The first deflation amount may be 0, or a value infinitely close to 0. That the deflation amount of the air valve is less than or equal to 0 may be understood as that the air valve does not release air. When the air valve is required not to release air, the correspondence between the voltage of the air valve and the air pressure of the air bladder is obtained. The correspondence between the voltage of the air valve and the air pressure of the air bladder indicates voltages of the air valve corresponding to different air