CN112057065B

CN112057065B - Blood pressure measuring method and electronic equipment

Info

Publication number: CN112057065B
Application number: CN201910498616.9A
Authority: CN
Inventors: 匡运生
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2022-09-02
Anticipated expiration: 2039-06-10
Also published as: WO2020248949A1; CN112057065A

Abstract

The embodiment of the application discloses a blood pressure measuring method and electronic equipment, relates to the field of electronic equipment, and solves the problems that a user is uncomfortable due to overlong blood pressure measuring time and the blood pressure measurement is inaccurate due to the fact that the user is uncomfortable. The specific scheme is as follows: the electronic equipment controls the air pump to inflate the air bag at a first inflation rate; the electronic equipment judges whether a pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation rate; when the electronic equipment determines that the pulse wave signal appears, the air pump is controlled to inflate the air bag at a second inflation rate, and the second inflation rate is smaller than the first inflation rate; the electronic equipment acquires a pulse wave signal and a static pressure signal in real time according to a pressure signal detected after the airbag is inflated at a second inflation rate; the electronic equipment determines the blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point. The embodiment of the application is used in the process of blood pressure measurement.

Description

Blood pressure measuring method and electronic equipment

Technical Field

The present application relates to the field of electronic devices, and in particular, to a blood pressure measuring method and an electronic device.

Background

Currently, electronic blood pressure meters are widely used. The electronic sphygmomanometer has two measurement methods: measurement at descent (MWD) and measurement at ascent (MWI). The MWD method is that the electronic sphygmomanometer is first raised quickly to a Pressure value that exceeds the user's Systolic Blood Pressure (SBP) and then lowered slowly. The electronic sphygmomanometer extracts an original signal comprising a pulse wave signal and a static pressure signal in the process of reducing the blood pressure, and calculates the blood pressure value (such as diastolic pressure and systolic pressure) of a user according to the pulse wave signal and the static pressure signal. The MWD method is generally used for the upper arm electronic sphygmomanometer, and the time for measuring the blood pressure is relatively long. The MWI method is that an electronic sphygmomanometer boosts pressure at a certain speed, extracts original signals including pulse wave signals and static pressure signals in the boosting process, extracts the characteristics of the pulse wave signals, and calculates the blood pressure value of a user according to the extracted characteristics and the static pressure signals. After the electronic sphygmomanometer extracts the characteristics of the needed pulse wave signals, the electronic sphygmomanometer starts to automatically reduce the pressure and finishes the measurement. The MWI method is generally used for a wrist-worn electronic sphygmomanometer, and the time for measuring blood pressure is relatively short.

The electronic sphygmomanometer in the market is mainly an upper arm type electronic sphygmomanometer and a wrist strap type electronic sphygmomanometer. Both types of electronic blood pressure meters can meet the requirements of the user for blood pressure measurement, but cannot be worn for a long time from the aspect of equipment size and weight. Namely, the method is not applicable to some requirements (such as night blood pressure measurement, blood pressure real-time tracking detection, blood pressure feedback control and the like) which require blood pressure measurement for a long time. These needs are just important means for effectively preventing and treating sudden diseases such as hypertension and stroke, and are rigid needs for users, especially for patients with hypertension.

In view of this, some manufacturers have developed wearable electronic blood pressure monitors, such as blood pressure watches. In order to shorten the blood pressure measurement time, most wearable electronic blood pressure meters adopt an MWI method. The appearance of the blood pressure watch is the same as that of a common electronic watch, and only an air bag is arranged on the inner side of the wrist strap. When the watch is worn on the wrist, the air bag can be tightly attached to the skin, the pump valve and the pressure sensor in the watch body are connected with the air bag, the pump valve is used for controlling inflation and deflation of the air bag, the pressure sensor is used for picking up the pressure of the air bag in real time, and then the blood pressure value of a user is determined according to the picked-up pressure. For example, referring to fig. 1, a signal decomposition diagram of a blood pressure measurement method provided in the prior art is shown, wherein the step of determining the blood pressure value of the user according to the picked-up pressure specifically includes: the pressure sensor picks up the pressure of the air bag to obtain the original signal, and the static pressure signal and the pulse wave signal can be extracted from the original signal. Extracting signal characteristics related to Blood Pressure according to the pulse wave signals, calculating the time of occurrence of Diastolic Blood Pressure (DBP) and SBP according to the signal characteristics, mapping the time of occurrence of DBP and the time of occurrence of SBP into static Pressure signals, and calculating to obtain Diastolic Pressure and systolic Pressure.

As shown in fig. 1, the electronic device may obtain an original signal according to the obtained pressure value of the air bag, and obtain a static pressure signal and a pulse wave signal according to the original signal. The pulse wave signal generally appears in the last stage of the linear boost of the blood pressure watch (the signal 2 shown in fig. 1 is the signal after the pulse wave signal appears). In the embodiment of the present application, for convenience of explanation, the original signal shown in fig. 1 may be divided into signal 1 and signal 2. Wherein, the signal 1 represents the signal of the original signal when the pulse wave signal is not present, and the signal 2 represents the signal of the original signal from which the pulse wave signal can be extracted. It will be appreciated that signals 1 and 2 may be continuous signals detected during inflation of the air bag by the air pump.

The static pressure corresponding to the appearance of the characteristic point of the pulse wave signal is strongly related to the actual blood pressure value of the user at that time. The higher the blood pressure is, the greater the static pressure required for the characteristic points of the pulse wave signal to appear intact, and the greater the maximum compression pressure is. In order to extract complete and high-quality pulse wave signals, most of the blood pressure watch products on the market currently adopt a constant-rate linear pressurization scheme, namely, the same pressurization rate is kept in the whole process of wrist watch pressurization until the pressurization is finished and the deflation is finished. This also results in a longer blood pressure measurement time being required for a higher blood pressure of the user.

The long-time blood pressure measurement may cause a decrease in blood pressure measurement accuracy due to user discomfort. For example: 1. the blood pressure circulation of the hands is blocked for a long time, so that the user feels uncomfortable with acid and numb feeling; 2. the pressurizing time is too long and no blood pressure value appears, so that the user is easy to generate anxiety and impatient emotion, the blood pressure fluctuates for a short time, and the measured blood pressure value is easy to deviate; 3. in the process of measuring the blood pressure, a user needs to keep a correct measurement posture (namely, the human body is still, the height of the wrist part is kept level with the height of the heart), if the duration is too long, the muscle strength for supporting and keeping the measurement posture is insufficient (especially for middle-aged and old people), the arm and the wrist of the user can generate unconscious micro-jitter, signals generated by the micro-jitter can be loaded into pulse wave signals as noise, the signal-to-noise ratio of the pulse wave signals is reduced, and the accuracy of blood pressure measurement is reduced.

Disclosure of Invention

The embodiment of the application provides a blood pressure measuring method and electronic equipment, and solves the problems that a user is uncomfortable due to too long blood pressure measuring time and the blood pressure measurement is inaccurate caused by the user discomfort.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, embodiments of the present application provide a blood pressure measurement method, which may be applied to an electronic device including an airbag and an air pump. The blood pressure measuring method comprises the following steps: the electronics control the air pump to inflate the airbag at a first inflation rate. The electronic equipment judges whether the pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation speed. And when the electronic equipment determines that the pulse wave signal appears, the air pump is controlled to inflate the air bag at a second inflation rate, and the second inflation rate is smaller than the first inflation rate. And the electronic equipment acquires the pulse wave signal and the static pressure signal in real time according to the pressure signal detected after the airbag is inflated at the second inflation rate. The electronic equipment determines the blood pressure value of the user according to the at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point.

In this way, by rapidly boosting the pressure segment before the pulse wave signal occurs (i.e., inflating the air bag at the first inflation rate), the time of the blood pressure measurement process is shortened, thereby solving the problem of discomfort of the user due to long-time measurement and the problem of inaccurate measurement due to discomfort of the user. Furthermore, after the pulse wave signal appears, the air bag is controlled to boost pressure at a normal speed (namely, the air bag is inflated at a second inflation speed), so that the extraction time of the pulse wave signal is prolonged, and the accuracy of blood pressure measurement is improved.

With reference to the first aspect, in one possible implementation manner, the determining whether a pulse wave signal is present includes: the electronic equipment detects the pressure value of the air bag in the process of controlling the air pump to inflate the air bag at the first inflation speed, and judges whether the pressure value of the air bag at the current moment is greater than a pressure threshold value or not; when the pressure value of the air bag at the current moment is larger than the pressure threshold value, the pulse wave signal is determined to appear, and when the pressure value of the air bag at the current moment is smaller than the pressure threshold value, the pulse wave signal is determined not to appear.

Therefore, when the pressure value of the air bag is larger than the pressure threshold value, the pulse wave signal is determined to appear, and the rapid pressure boosting stage (namely the stage of inflating the air bag at the first inflation speed) can be finished when the pulse wave appears, so that the accurate extraction of the pulse wave signal is ensured.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining whether a pulse wave signal occurs includes: the electronic equipment detects the pressure signal of the air bag in the process of controlling the air pump to inflate the air bag at the first inflation speed, and judges whether the pulse wave signal can be extracted from the detected pressure signal or not. When the pulse wave signals can be extracted from the detected pressure signals, the pulse wave signals are determined to appear, and when the pulse wave signals cannot be extracted from the detected pressure signals, the pulse wave signals are determined not to appear.

Therefore, whether the pulse wave signal appears or not can be accurately determined by analyzing the pressure signal in the blood pressure measuring process.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the electronic device determines the pressure threshold according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and the pressure threshold value is the minimum pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

Therefore, the pressure threshold is determined according to the minimum value of the pressure value of the air bag when the pulse wave signal appears in the historical blood pressure measuring process for multiple times, and the pulse wave signal can be ensured to appear or will appear in a short time when the pressure value of the air bag reaches the pressure threshold in the measuring process.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the electronic device obtains at least one pressure interval, where a pulse wave signal included in a pressure signal detected in the at least one pressure interval may include a feature point; the electronic equipment detects the pressure value of the air bag after controlling the air pump to inflate the air bag at the second inflation rate; for each pressure interval in the at least one pressure interval, the electronic device controls the air pump to inflate the air bag at a third inflation rate from the time when the pressure value of the air bag is equal to the minimum value of the pressure interval, and controls the air pump to inflate the air bag at a second inflation rate again until the pressure value of the air bag is equal to the maximum value of the pressure interval, wherein the third inflation rate is smaller than the second inflation rate.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the electronic device determines at least one pressure interval according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and at least one pressure interval is a set of the pressure values of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

Therefore, the pressure interval where the characteristic points of the pulse wave signals appear in the historical multi-time blood pressure measuring process is combined, and the possible pressure value interval of the air bag when the characteristic points appear in the measuring process can be accurately judged. Inflating the balloon at a slower rate within the interval (i.e., inflating the balloon at the third inflation rate) can further improve the accuracy of feature point extraction. And outside the interval, inflate the gasbag with normal speed, can guarantee that the pressure of gasbag can rise to the pressure interval when the characteristic point appears next time fast, can avoid the unnecessary time waste that leads to in order to improve the degree of accuracy.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the electronic device determines the first inflation rate according to a pressure threshold and a preset pressure rise time, where the pressure rise time is a time required for a pressure value of the airbag to rise from 0 to the pressure threshold.

Therefore, the pressure value of the air bag can be ensured to rise to the air bag pressure value of the pulse wave signal in a short time (such as a preset boosting time) for users with different blood pressures.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, before the electronic device controls the air pump to inflate the airbag at the first inflation rate, the method further includes: the electronic device judges whether the air pump can be controlled to inflate the air bag at the first inflation rate or not according to historical measurement data, wherein the historical measurement data comprise: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times; the electronic device controls the air pump to inflate the airbag at a first inflation rate, comprising: the electronic equipment controls the air pump to inflate the air bag at a first inflation rate when the difference between the pressure values of the air bag is smaller than a variation threshold when pulse wave signals appear in the process of measuring blood pressure for any two times in the historical measurement data; and if the difference between the pressure values of the air bag when the pulse wave signals appear in any two blood pressure measurement processes is larger than the variation threshold, controlling the air pump to inflate the air bag at a second inflation rate.

Therefore, whether the pressure value of the air bag can reach the pressure value of the pulse wave signal quickly by using the quick boosting method is judged according to the historical measurement data, whether the historical measurement data can be used as the reference of the current measurement can be determined, and the problem that the pulse wave signal is still quickly boosted when the pulse wave signal appears due to the fact that the historical measurement data is used as the reference for quick boosting is avoided, namely, the method can effectively avoid the reduction of the extraction accuracy of the pulse wave signal.

In a second aspect, an embodiment of the present application provides an electronic device. The electronic equipment comprises a control unit, a judgment unit, a determination unit, an air bag and an air pump; a control unit for controlling the air pump to inflate the airbag at a first inflation rate; the judging unit is used for judging whether the pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation rate; the control unit is also used for controlling the air pump to inflate the air bag at a second inflation rate when the pulse wave signal is determined to appear, and the second inflation rate is smaller than the first inflation rate; the determining unit is used for acquiring a pulse wave signal and a static pressure signal in real time according to the pressure signal detected after the air bag is inflated at the second inflation rate; and the determining unit is further used for determining the blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point.

With reference to the second aspect, in a possible implementation manner, the electronic device further includes a detection unit, where the detection unit is configured to detect a pressure value of the airbag during a process of controlling the air pump to inflate the airbag at the first inflation rate; the judging unit judges whether the pulse wave signal appears or not, and comprises the following steps: the judgment unit judges whether the pressure value of the air bag at the current moment is greater than a pressure threshold value; when the pressure value of the air bag at the current moment is larger than the pressure threshold value, the pulse wave signal is determined to appear, and when the pressure value of the air bag at the current moment is smaller than the pressure threshold value, the pulse wave signal is determined not to appear.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the electronic device further includes a detection unit, where the detection unit is configured to detect a pressure signal of the airbag during a process of controlling the air pump to inflate the airbag at the first inflation rate; the judging unit judges whether the pulse wave signal appears or not, and comprises the following steps: the judging unit judges whether the pulse wave signal can be extracted from the detected pressure signal; when the pulse wave signals can be extracted from the detected pressure signals, the pulse wave signals are determined to appear, and when the pulse wave signals cannot be extracted from the detected pressure signals, the pulse wave signals are determined not to appear.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is further configured to determine the pressure threshold according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for a plurality of times, and the pressure threshold value is the minimum pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for a plurality of times in history.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is further configured to determine at least one pressure interval, where a pulse wave signal included in the pressure signal detected in the at least one pressure interval may include a feature point; the detection unit is also used for detecting the pressure value of the air bag after controlling the air pump to inflate the air bag at the second inflation rate; for each of the at least one pressure interval, the control unit controls the air pump to inflate the airbag at a third inflation rate starting from the pressure value of the airbag being equal to the minimum value of the pressure interval, and controls the air pump to inflate the airbag at the second inflation rate again until the pressure value of the airbag is equal to the maximum value of the pressure interval, the third inflation rate being less than the second inflation rate.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is further configured to determine at least one pressure interval according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and at least one pressure interval is a set of the pressure values of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is further configured to determine the first inflation rate according to a pressure threshold and a preset pressure rise time, where the pressure rise time is a time required for the pressure value of the airbag to rise from 0 to the pressure threshold.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, before the control unit controls the air pump to inflate the air bag at the first inflation rate, the determining unit determines whether the air pump can be controlled to inflate the air bag at the first inflation rate according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times; the control unit controls the air pump to inflate the airbag at a first inflation rate, comprising: when the judgment unit determines that the difference between the pressure values of the air bag is smaller than the variation threshold when the pulse wave signal appears in any two blood pressure measurement processes in the historical measurement data, the control unit controls the air pump to inflate the air bag at a first inflation rate; the judgment unit determines that the difference between the pressure values of the air bag when the pulse wave signals appear in any two blood pressure measurement processes in the historical measurement data is larger than the variation threshold, and the control unit controls the air pump to inflate the air bag at a second inflation rate.

In a third aspect, an embodiment of the present application provides an electronic device, which may include a processor, configured to connect to a memory and call a program stored in the memory to perform a blood pressure measurement method according to the first aspect or any one of possible implementation manners of the first aspect.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, including: computer software instructions; the computer software instructions, when executed in the over-temperature protection device, cause the blood pressure measurement device to perform the blood pressure measurement method as defined in the first aspect or any one of the possible implementations of the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program product, which when run on a computer, causes the computer to execute the blood pressure measurement method according to the first aspect or any one of the possible implementations of the first aspect.

It is to be understood that the electronic device according to the second aspect and the electronic device according to the third aspect provided above, the computer-readable storage medium according to the fourth aspect provided above, and the computer program product according to the fifth aspect are all configured to perform the corresponding method provided above, and therefore, the beneficial effects achieved by the electronic device can refer to the beneficial effects in the corresponding method provided above, and are not described herein again.

Drawings

FIG. 1 is a signal decomposition diagram of a blood pressure measurement method provided by the prior art;

fig. 2 is a schematic composition diagram of an electronic device according to an embodiment of the present disclosure;

fig. 3 is a schematic flow chart of a blood pressure measuring method according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram illustrating the static pressure signal and the pulse wave signal in the blood pressure measurement process according to the embodiment of the present application;

fig. 5 is a schematic flow chart of a blood pressure measuring method according to another embodiment of the present application;

FIG. 6 is a schematic flow chart of another blood pressure measurement method according to another embodiment of the present application;

fig. 7 is a schematic composition diagram of an electronic device according to an embodiment of the present application;

fig. 8 is a schematic composition diagram of another electronic device provided in the embodiment of the present application.

Detailed Description

Generally, the duration of a single blood pressure measurement by using the traditional mercury sphygmomanometer should not exceed 30 seconds, the duration of a single blood pressure measurement by using the electronic sphygmomanometer should not exceed 40 seconds, otherwise, the user may have discomfort due to the overlong measurement time, and the blood pressure measurement result is inaccurate.

Taking an electronic sphygmomanometer as an example, 852 blood pressure data samples collected by the blood pressure watch are shown in table 1.

TABLE 1

Systolic pressure	Measuring average time
		<100mmHg	39.51s
100-120mmHg	41.59s
		120-140mmHg	42.58s
140-160mmHg	45.12s
		>＝160mmHg	55.75s

As shown in table 1, the blood pressure watches all measure systolic pressure for times greater than or close to 40 s. Meanwhile, as the systolic pressure rises, the measurement time becomes significantly longer. Therefore, a user with a relatively high blood pressure takes longer time to measure the blood pressure using the blood pressure wristwatch than an ordinary user. This may also cause discomfort to the user resulting in inaccurate blood pressure measurements.

In order to solve the above problem, embodiments of the present application provide a blood pressure measurement method, which may be applied to an electronic device. Generally, the pulse wave signal occurs in the last stage of the linear boost. By adopting the method of the embodiment, in the pressure interval before the pulse wave signal appears, the electronic equipment can rapidly measure the pulse wave signal by inflating the air bag of the electronic equipment at a higher pressure boosting rate. The method can shorten the inflation time before the pulse wave signal appears, thereby reducing the time for measuring the blood pressure, avoiding the uncomfortable phenomenon of a user during long-time measurement and improving the accuracy of the blood pressure measurement. After the pulse wave signal appears, the normal pressure increasing rate can be adopted to continuously inflate the air bag. Further, in a pressure interval in which the characteristic point of the pulse wave signal is likely to appear, the air bag is continuously inflated at a lower pressure increasing rate. So as to prolong the acquisition time of the pulse wave signals, thereby more accurately extracting the characteristic points of the pulse wave signals and obtaining more accurate static pressure values. The accuracy of blood pressure measurement is further improved.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

For example, the electronic device in the embodiment of the present application may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) \ Virtual Reality (VR) device, a wearable device (such as a smart watch, which may also be referred to as a blood pressure watch in this embodiment), and the embodiment of the present application does not particularly limit the specific form of the device.

Please refer to fig. 2, which is a schematic diagram illustrating an electronic device according to an embodiment of the present disclosure. As shown in fig. 2, the electronic device 200 may include a Micro-Controller Unit (MCU) 201, a storage Unit 202, an air pump control Unit 203, an air pump 204, an air bag 205, and a pressure sensor 206. These components may be connected by a communication line 207.

In this embodiment, the MCU201 can be used to control and process information, taking charge of signal detection and controlling other components.

The storage unit 202 may be configured to store static pressure intervals corresponding to the pulse wave signals during the historical N blood pressure measurements and pressure values of the air bag corresponding to the occurrence of the feature points in each pulse wave signal (in this embodiment, the pressure values of the air bag may also be referred to as static pressure values).

The air pump control unit 203 may be used to control the rate of inflation output by the air pump 204. The air pump 204 may be connected to the balloon 205 through a connection port or conduit, and may be used to inflate the balloon 205 or control the deflation of the balloon 205. The air pump control unit 203 can adjust the pressure increase rate of the air bag 205 when the air pump 204 inflates the air bag 205 by changing the inflation rate output by the air pump 204. The air pump control unit 203 can control the inflation rate of the output of the air pump 204 by adjusting the input power (such as voltage or current) of the air pump 204, or can control the inflation rate of the output of the air pump 204 by adjusting the duty ratio of the signal input to the air pump 204.

Bladder 205 may be constructed of polyvinyl chloride or silicone. When the balloon 205 is inflated, the balloon 205 is gradually inflated to press the radial artery of the wrist, and at this time, a change in the pressure value of the balloon 205 corresponds to pulsation of the radial artery of the wrist. The air bag 205 is provided with at least two connecting holes, wherein one connecting hole can be used for connecting the air pump 204 to inflate or deflate the air bag 205, and the other connecting hole can be used for connecting the pressure sensor 206 to achieve real-time pickup of the pressure value of the air bag by the pressure sensor 206.

In the embodiment of the present application, the electronic device may not include the air pump 204 and the air bag 205, but may be connected with the air pump and the air bag.

The MCU201 may also be referred to as a processor, and may include one or more processing units, such as: may include an Application Processor (AP), a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a memory, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), among others. The different processing units may be separate devices or may be integrated into one or more processors. For example, the air pump control unit 203 may be a separate device or may be integrated with the MCU202 in one or more processors.

The controller may be a neural center and a command center of the electronic device. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor. If the processor needs to use the instruction or data again, it can be called directly from the memory. Avoiding repeated accesses and reducing the latency of the processor, thereby increasing the efficiency of the system.

In some embodiments, a processor may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

The memory unit 202, which may also be referred to as an internal memory, may be used to store electronic device executable program code, which includes instructions. The MCU201 executes various functional applications and data processing of the electronic device by executing instructions stored in the storage unit 202. For example, in the embodiment of the present application, after receiving an operation of measuring blood pressure by executing an instruction stored in the storage unit 202, the MCU201, as a response to the operation, executes a corresponding event, for example, determines a pressure segment in which a pulse wave may occur according to historical measurement data stored in the storage unit 202, confirms a static pressure interval measured this time, and calculates a corresponding inflation rate, so as to control the pressure increase rate of the air bag 205 by the air pump control unit 203. The storage unit 202 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area can store data (such as pressure signals and the like) created during the use of the electronic device, and the like. In addition, the storage unit 202 may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a Universal Flash Storage (UFS), and the like.

It should be understood that the connection relationship between the modules illustrated in the present embodiment is only an exemplary illustration, and does not limit the structure of the electronic device. In other embodiments, the electronic device may also adopt different connection manners or a combination of connection manners in the above embodiments.

The configuration illustrated in the present embodiment is not intended to specifically limit the electronic device. In other embodiments, an electronic device may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

For example, the electronic device may further include one or more of the following modules: the charging management module is configured to receive a charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module may receive charging input from a wired charger via a USB interface. In some wireless charging embodiments, the charging management module may receive a wireless charging input through a wireless charging coil of the electronic device. The charging management module can charge the battery of the electronic equipment and can also supply power to the electronic equipment through the power supply management module.

The power management module is used for connecting a battery of the electronic equipment. The power management module receives the input of the battery and/or the charging management module and supplies power to the MCU201, the storage unit 202, the air pump control unit and the like. The power management module may also be used to monitor parameters such as battery capacity, battery cycle number, battery state of health (leakage, impedance), etc. In other embodiments, the power management module may be disposed in the processor. In other embodiments, the power management module and the charging management module may be disposed in the same device.

The electronic device may also be equipped with wireless communication capabilities. The wireless communication function can be realized by the antenna 1, the antenna 2, the mobile communication module, the wireless communication module, the modulation and demodulation processor, the baseband processor and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in an electronic device may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module can provide a solution including 2G/3G/4G/5G wireless communication applied to the electronic equipment. The mobile communication module may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit the electromagnetic waves to the modem processor for demodulation. The mobile communication module can also amplify the signal modulated by the modulation and demodulation processor and convert the signal into electromagnetic wave to be radiated by the antenna 1. In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the processor. In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the same device as at least part of the modules of the processor.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor may output a sound signal through an audio device (not limited to a speaker, a receiver, etc.) of the electronic device, or display an image or video through a display screen of the electronic device. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be separate from the processor, and may be disposed in the same device as the mobile communication module or other functional module.

The wireless communication module may provide solutions for wireless communication applied to electronic devices, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), Bluetooth (BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The wireless communication module may be one or more devices integrating at least one communication processing module. The wireless communication module receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor. The wireless communication module can also receive a signal to be transmitted from the processor, frequency-modulate and amplify the signal, and convert the signal into electromagnetic wave to radiate the electromagnetic wave through the antenna 2.

In some embodiments, the antenna 1 of the electronic device is coupled to a mobile communication module and the antenna 2 is coupled to a wireless communication module so that the electronic device can communicate with networks and other devices through wireless communication techniques. The wireless communication technology may include global system for mobile communications (GSM), General Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), Wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), Long Term Evolution (LTE), LTE, BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).

The electronic device may also have a display function. For example, the display function may be implemented by a GPU, a display screen, an application processor, and the like. The GPU is a microprocessor for image processing and is connected with a display screen and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen is used for displaying images, videos and the like. The display screen includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the electronic device may include 1 or N display screens, N being a positive integer greater than 1.

The electronic device may also have a shooting function, which may be implemented by, for example, an ISP, a camera, a video codec, a GPU, a display screen, an application processor, and the like.

The ISP is used for processing data fed back by the camera. The camera is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The light sensing element converts the optical signal into an electrical signal, which is then passed to the ISP where it is converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into image signal in standard RGB, YUV and other formats. In some embodiments, the electronic device may include 1 or N cameras, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. For example, when the electronic device is in frequency bin selection, the digital signal processor is used for performing fourier transform and the like on the frequency bin energy.

Video codecs are used to compress or decompress digital video. The electronic device may support one or more video codecs. In this way, the electronic device can play or record video in a variety of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

The NPU is a neural-network (NN) computing processor that processes input information quickly by using a biological neural network structure, for example, by using a transfer mode between neurons of a human brain, and can also learn by itself continuously. The NPU can realize applications such as intelligent cognition of electronic equipment, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The electronic device may further include an external memory interface, which may be used to connect an external memory card, such as a Micro SD card, to extend the storage capability of the electronic device. The external memory card communicates with the processor through the external memory interface to realize the data storage function. For example, files such as music, video, etc. are saved in an external memory card.

The electronic device may also implement audio functions, such as audio functions implemented via an audio module, a speaker, a receiver, a microphone, an earphone interface, and an application processor. Such as music playing, recording, etc.

The electronic device may include one or more of the following sensors in addition to the pressure sensor 206 described above: the gyroscope sensor may be used to determine a motion gesture of the electronic device. In some embodiments, the angular velocity of the electronic device about three axes (i.e., the x, y, and z axes) may be determined by the gyroscope sensors. The gyro sensor may be used for photographing anti-shake. The gyroscope sensor can also be used for navigation and body feeling game scenes. The pressure sensor is used for measuring air pressure. In some embodiments, the electronic device calculates altitude from barometric pressure values measured by the pressure sensors, aiding in positioning and navigation. The magnetic sensor includes a hall sensor. The electronic device can detect the opening and closing of the flip leather sheath by using the magnetic sensor. The acceleration sensor can detect the magnitude of acceleration of the electronic device in various directions (generally three axes). When the electronic device is stationary, the magnitude and direction of gravity can be detected. The method can also be used for recognizing the posture of the electronic equipment, and is applied to horizontal and vertical screen switching, pedometers and other applications. A distance sensor for measuring a distance. The electronic device may measure distance by infrared or laser. The proximity light sensor may include, for example, a Light Emitting Diode (LED) and a light detector, such as a photodiode. The light emitting diode may be an infrared light emitting diode. The electronic device emits infrared light to the outside through the light emitting diode. The electronic device uses a photodiode to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it can be determined that there is an object near the electronic device. When insufficient reflected light is detected, the electronic device may determine that there are no objects near the electronic device. The ambient light sensor is used for sensing the ambient light brightness. The electronic device may adaptively adjust the display screen brightness based on the perceived ambient light brightness. The fingerprint sensor is used for collecting fingerprints. The electronic equipment can utilize the collected fingerprint characteristics to realize fingerprint unlocking, access to an application lock, fingerprint photographing, fingerprint incoming call answering and the like. The temperature sensor is used for detecting temperature. Touch sensors, also known as "touch panels". The touch sensor can be arranged on the display screen, and the touch sensor and the display screen form the touch screen, which is also called a touch screen. The touch sensor is used to detect a touch operation applied thereto or nearby. The touch sensor can communicate the detected touch operation to the application processor to determine the touch event type. Visual output related to the touch operation may be provided through the display screen. In other embodiments, the touch sensor may be disposed on a surface of the electronic device at a different location than the display screen. The bone conduction sensor may acquire a vibration signal. In some embodiments, the bone conduction sensor may acquire a vibration signal of a human voice vibrating a bone mass. The bone conduction sensor can also contact the pulse of the human body to receive the blood pressure pulsation signal. In some embodiments, the bone conduction sensor may also be disposed in a headset, integrated into a bone conduction headset. The audio module can analyze a voice signal based on the vibration signal of the sound part vibration bone block acquired by the bone conduction sensor, so as to realize a voice function. The application processor can analyze heart rate information based on the blood pressure beating signals acquired by the bone conduction sensor, and a heart rate detection function is realized.

The electronic device may further include an indicator, such as an indicator light, which may be used to indicate a charging status, a change in power, or a message, missed call, notification, etc. The SIM card interface is used for connecting the SIM card. The SIM card can be attached to and detached from the electronic device by being inserted into or pulled out of the SIM card interface. The electronic equipment can support 1 or N SIM card interfaces, and N is a positive integer greater than 1.

The methods in the following embodiments may be implemented in an electronic device having the above hardware structure.

The blood pressure measuring method provided by the embodiment of the application can be used for quickly and accurately measuring the blood pressure. The method can be applied to electronic devices. In the following embodiments of the present application, an example of an electronic device is a blood pressure watch is described. The method can be realized by the following steps:

when the blood pressure measurement is started, an air pump of the blood pressure watch starts to add pressure to the air bag for inflation, the pressure value of the air bag starts to rise linearly from 0mmHg, and the air pump inflates the air bag at a large inflation rate before a pulse wave signal appears.

It will be appreciated that the greater the rate of inflation, the greater the rate of pressurization of the bladder. Therefore, before the pulse wave signal appears, the air pump inflates the air bag at a larger inflation rate, so that the air bag can be pressurized at a faster pressurization rate, and the pulse wave signal can appear quickly.

When the pulse wave signal appears, the inflation rate of the air pump is reduced, and the air pump returns to inflate the air bag at the normal inflation rate so as to accurately acquire the pulse wave signal and the static pressure signal.

Furthermore, after the pulse wave signal appears, in a pressure interval in which the characteristic points of the pulse wave signal may appear, the inflation rate of the air pump is continuously reduced, so that the air bag is pressurized at a lower pressurization rate, the blood pressure watch can more accurately extract the characteristic points of the pulse wave signal and the pressure value of the air bag when the characteristic points appear, until all the characteristic points needing to be extracted are completely extracted, the air pump is deflated, and the blood pressure measurement is finished.

It should be noted that, in the process of measuring the blood pressure, the pulse wave signal detected by the blood pressure watch continuously appears in the last stage of the linear pressure increase of the blood pressure watch along with the pressure increase of the blood pressure watch air bag. For the same user, the pulse wave signal generally does not change drastically, that is, the pressure value of the air bag when the pulse wave signal occurs and the pressure value of the air bag when all the feature points in the pulse wave signal are extracted do not change drastically. Therefore, after the pulse wave signal appears, the pressure increasing rate of the air bag in the blood pressure watch is reduced, so that the detection time of the pulse wave signal is prolonged, and the extraction of the characteristic point information in the pulse wave signal can be effectively improved.

The method provided by the embodiment of the application is described in detail below with reference to the accompanying drawings. Referring to fig. 3 in conjunction with fig. 2, a schematic flow chart of a blood pressure measurement method according to an embodiment of the present application is shown. As shown in fig. 3, the method may include the following S301-S305.

S301, the electronic device controls the air pump to inflate the air bag at a first inflation rate.

Illustratively, in conjunction with fig. 2, after the blood pressure watch receives the operation of blood pressure measurement of the user, the MCU may send a command to the air pump control unit so that the air pump control unit controls the air pump to inflate the air bag at the first inflation rate.

The pulse wave signal appears in the last section of the linear boosting of the blood pressure watch. Therefore, at the start of measuring the blood pressure, the air pump can be controlled to inflate the air cells at a relatively large inflation rate, such as the first inflation rate described above, so that the air cells can be quickly pressurized.

S302, the electronic equipment judges whether a pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation rate.

The electronic device may perform the following S303 when determining that the pulse wave signal is present. When it is determined that the pulse wave signal does not appear, the air pump may be continuously controlled to inflate the airbag at the first inflation rate, i.e., the above S301 may be continuously performed.

Illustratively, in conjunction with fig. 2, the pressure sensor in the blood pressure watch can detect the pressure value of the air bag in real time and transmit the pressure value to the MCU. The MCU can judge whether the pulse wave signal appears according to the pressure value of the air bag detected in real time.

For example, in one possible implementation manner, the MCU may determine a magnitude relationship between a pressure value of the airbag detected in real time and a pressure threshold, and may determine that a pulse wave signal occurs if the MCU determines that the pressure value of the airbag at the current time is greater than the pressure threshold. If the MCU determines that the pressure value of the air bag at the current moment is smaller than the pressure threshold value, the pulse wave signal can be determined not to be present.

For another example, in another possible implementation manner, the MCU may obtain a pressure signal according to a pressure value of the airbag detected in real time, such as the original signal shown in fig. 1, and after analyzing the original signal, the MCU may determine whether the pulse wave signal appears by determining whether the pulse wave signal can be extracted from the original signal. If the MCU determines that a pulse wave signal can be extracted from the detected original signal, it can be determined that the pulse wave signal is present. If the MCU determines that the pulse wave signal cannot be extracted from the detected original signal, it may be determined that the pulse wave signal is not present.

It should be noted that, in the actual blood pressure measurement process, during a period of time when the pulse wave signal begins to appear, the signal amplitude is very small, the signal-to-noise ratio is very low, and is not enough to provide effective measurement information, so that the pulse wave signal can still be considered not to appear during the period of time. In order to accurately determine the occurrence of the pulse wave signal that can provide effective information, the extracting of the pulse wave signal in the embodiment of the present application may be to extract a signal whose signal amplitude reaches an amplitude threshold. For example, when the pressure of the airbag is increased to 40mmHg, the pulse wave signal starts to appear, but the amplitude of the signal does not reach the amplitude threshold value, so that the pulse wave signal can still be considered not to appear, and the airbag is continuously inflated according to the first inflation rate. And the pressure of the air bag continues to rise, the pulse wave signal begins to appear, and the amplitude of the signal reaches an amplitude threshold value, so that the pulse wave signal appears at this time, and the air pump is controlled to inflate the air bag at a second inflation rate.

And S303, controlling the air pump to inflate the air bag at a second inflation rate, wherein the second inflation rate is smaller than the first inflation rate.

For example, in conjunction with fig. 2, the MCU can determine whether the pulse wave signal appears according to the pressure value of the air bag detected in real time. When the pulse wave signal is determined to be present, the blood pressure watch can control the air pump to inflate the air bag at a second inflation rate, so that the air bag is pressurized at a normal pressurization rate. Namely, the rapid pressure increase of the air bag is ended, and the air bag is inflated at a normal pressure increase rate to ensure that the pulse wave signal can be accurately extracted.

S304, the electronic equipment acquires a pulse wave signal and a static pressure signal according to the pressure signal detected after the airbag is inflated at the second inflation rate.

For example, after the blood pressure watch controls the air pump to inflate the air bag at the second inflation rate, the MCU may continue to detect the pressure value of the air bag and obtain a pressure signal therefrom. In addition, after the rapid pressure increase is finished, the air bag can be inflated at a uniform speed at the second inflation rate, and then the static pressure in the air bag rises linearly. The MCU can separate the fluctuating pulse wave signal from the linearly rising static pressure signal, so that the pulse wave signal and the static pressure signal can be obtained.

S305, the electronic equipment determines the blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point.

The pulse wave signal includes a large amount of waveform features. The waveform characteristics can reflect the characteristic points of the pulse wave signals, and the blood pressure values (such as diastolic pressure and systolic pressure) of the user can be obtained by collecting and analyzing the characteristic points of the pulse wave signals and referring to the static pressure signal.

According to the blood pressure measuring method provided by the embodiment of the application, the pressure section before the pulse wave signal appears is quickly boosted, so that the blood pressure measuring time can be effectively shortened. Simultaneously, the pressure section after pulse wave signal appears steps up with normal speed to the detection time of extension pulse wave signal can effectual improvement like this draw the degree of accuracy of the characteristic point of pulse wave signal, and then has promoted blood pressure measurement's degree of accuracy.

Another embodiment of the present application provides a blood pressure measuring method, which may be applied to an electronic device. According to the method, the pressure threshold and the at least one pressure interval are determined according to historical measurement data, and the electronic equipment can adjust the pressure increasing rate of the air bag according to the pressure threshold and the at least one pressure interval so as to shorten time consumption in the blood pressure measurement process and further improve the accuracy of the blood pressure measurement.

The blood pressure measurement method provided by the embodiment of the present application is described in detail below with reference to fig. 4 and 5.

It is understood that the electronic device (e.g., blood pressure watch) according to the embodiments of the present application may be worn on the wrist of the user for a long time, and thus, the blood pressure watch has a user-specific characteristic. The blood pressure fluctuation range of the same user in a short time is not large, and the possible pressure value of the air bag when the pulse wave signal appears in the current measurement process can be estimated by recording the pulse wave signal of the user in a past period of time or historical N times (N is greater than or equal to 1) of blood pressure measurement data (namely historical measurement data).

Similarly, for the same user, the pressure values of the air bag when the characteristic points of the pulse wave signals appear in a period of time are relatively fixed, so that the pressure values of the air bag when the characteristic points of the pulse wave signals appear in the historical measurement data can be used as a reference to estimate the possible pressure values of the air bag when the characteristic points of the pulse wave signals appear in the current measurement process.

In this embodiment, the pressure increasing rate of the air bag can be adjusted based on the pressure value of the air bag when the pulse wave signal appears in the present measurement process and the pressure value of the air bag when the feature point of the pulse wave signal appears. This method may be referred to as a historical data method.

Here, the pressure value of the air bag when the estimated pulse wave signal is likely to occur may be referred to as a pressure threshold value, and the set of the pressure values possible for the air bag when the feature point of the estimated pulse wave signal is likely to occur may be referred to as a pressure section.

The determination process between the pressure threshold and the pressure zone is described by taking the electronic device as a blood pressure watch as an example.

In one aspect, the electronic device can determine a pressure threshold from historical measurement data. The historical measurement data may include: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for many times. The pressure threshold may be a minimum pressure value of the air bag at the occurrence of the pulse wave signal during a plurality of historical blood pressure measurements. For example, the blood pressure watch may store the pressure value of the air bag when the pulse wave signal appears during the historical N times (N is greater than or equal to 1) of blood pressure measurement. Because the blood pressure value of the same user in different time fluctuates with a certain amplitude, the pressure value of the air bag can also change when the pulse wave signal appears in the historical N blood pressure measurement processes. The minimum pressure value of the air bag when the pulse wave signal appears in the historical N blood pressure measurement processes can be used as the pressure threshold value. That is, in the present blood pressure measurement process, when the pressure value of the air bag is larger than the pressure threshold value, the pulse wave signal may appear, or appear in a short time thereafter.

Exemplarily, referring to fig. 4, a schematic diagram of the correspondence between the static pressure signal and the pulse wave signal in the blood pressure measurement process provided in the embodiment of the present application is shown.

As shown in fig. 4, it is assumed that the minimum pressure value of the air bag when the pulse wave signal occurs is P1 based on the historical measurement data. Then, when the pressure value of the air bag reaches P1, it means that the pulse wave signal has appeared in the blood pressure measurement, or will appear in a short time. As shown in fig. 4, the pulse wave signal reaches point M1, indicating that the pulse wave signal has occurred, and M1 is shortly after the balloon pressure reaches P1. That is, the P1 can be used as the pressure threshold value for the current blood pressure measurement.

For example, in the blood pressure measurement data recorded 3 times in the history (that is, N is 3), the pressure values of the air bags at the time of occurrence of the pulse wave signal are 105mmHg, 108mmHg, and 102mmHg, respectively, and then 102mmHg may be used as the pressure threshold value.

In another aspect, the electronic device may determine at least one pressure interval based on historical measurement data. The historical measurement data may include: and (3) the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times. The at least one pressure interval may be a set of pressure values of the air bag at which characteristic points of the pulse wave signal occur during a plurality of historical blood pressure measurements. For example, the blood pressure watch may store pressure values of the air bag at the time of occurrence of feature points of respective pulse wave signals in historical N times (N is greater than or equal to 1) of blood pressure measurements. The characteristic points of the pulse wave signal may include an envelope peak value, an envelope inflection point, an envelope slope maximum point, and the like. For an average user, the envelope of the pulse wave signal exhibits a unimodal morphology with an increase followed by a decrease. The section of the pulse wave envelope which is continuously increased is called an ascending section, the section of the pulse wave envelope which is continuously reduced is called a descending section, and the middle between the ascending section and the descending section is the point with the maximum pulse wave envelope amplitude value, which is called an envelope peak value. In addition, the ascending section and the descending section respectively contain other characteristic points, such as envelope inflection points and the like.

It can be understood that the feature points of the pulse wave signal are obtained by analyzing the entire pulse wave signal, and therefore, whether the feature points of the pulse wave signal appear or not cannot be determined by detecting the pulse wave signal in real time. For the same user, the pressure value of the corresponding air bag is relatively fixed when the characteristic points of the pulse wave signals appear in a period of time. Therefore, for a certain characteristic point, the possible pressure interval of the air bag when the characteristic point appears can be obtained through historical measurement data. Thus, whether the characteristic point appears can be determined according to whether the pressure value of the air bag at the current moment is in the interval (namely, whether the pressure value of the current air bag is larger than the minimum value of the interval and smaller than the maximum value of the interval).

In the blood pressure measurement process, it is necessary to extract a plurality of feature points from the pulse wave signal. In the multiple measurement processes, the pressure value of the air bag can fluctuate within a small range when the same characteristic point appears, so that the pressure value of the air bag can form an interval corresponding to the characteristic point when each characteristic point appears, and the intervals corresponding to the characteristic point in the different measurement processes are merged, so that the range of the pressure value of the air bag when the characteristic point possibly appears can be obtained. In this embodiment, a range of pressure values of the airbag when the characteristic point is likely to occur is referred to as a pressure zone. When the pressure value of the air bag is within the pressure interval, the probability of the characteristic point is relatively high. Similarly, a pressure interval corresponding to each of the plurality of feature points may be obtained.

Referring to fig. 4, it is assumed that the feature points of the pulse wave signals include M2 and M3 in fig. 4. According to the historical measurement data, in the historical N blood pressure measurement processes, the minimum value of the pressure value of the air bag when M2 appears is P2, and the maximum value of the pressure value of the air bag when M2 appears is P2', so that the pressure section corresponding to M2 can be [ P2, P2' ]. Similarly, the pressure interval corresponding to M3 may be [ P3, P3' ], based on historical measurement data. Then, the pressure intervals corresponding to the characteristic points M2 and M3 of the pulse wave signal may be [ P2, P2'] [ P3, P3' ]. That is, in the present blood pressure measurement process, when the pressure value of the air bag is within the pressure interval [ P2, P2'] [ P3, P3' ], the occurrence probability of M2 and M3 is relatively large.

It should be noted that the pressure intervals corresponding to different feature points may be intersected or not intersected. In this embodiment, the pressure intervals corresponding to the plurality of feature points of the pulse wave signal may be merged to obtain the pressure interval of the feature point that needs to be extracted in the pulse wave signal. The number of pressure intervals to be finally obtained may be one or more.

For example, the plurality of feature points to be extracted include: feature point a, feature point B, and feature point C. In the recorded historical measurement data, the pressure intervals corresponding to the characteristic points A are [ A1, A2], the pressure intervals corresponding to the characteristic points B are [ B1, B2], and the pressure intervals corresponding to the characteristic points C are [ C1, C2 ]. It is assumed that a1< B1< a2< B2< C1< C2, that is, the interval of the pressure values of the airbag at the time of the occurrence of the characteristic point a intersects with the interval of the pressure values of the airbag at the time of the occurrence of the characteristic point B. Then, for the union set of the pressure intervals corresponding to the feature point a, the feature point B, and the feature point C, the pressure interval in which the feature point needs to be extracted in the obtained pulse wave signal may be [ a1, B2] < u [ C1, C2 ]. That is, when the pressure value of the airbag is within the pressure section of [ a1, B2], [ C1, C2], the occurrence probability of the characteristic point a, the characteristic point B, and the characteristic point C is relatively large.

Please refer to fig. 5, which is a flowchart illustrating a blood pressure measuring method according to another embodiment of the present application. The blood pressure measuring method provided by the embodiment of the application can comprise the following steps: S501-S508.

S501, the electronic equipment determines that the air pump can be controlled to inflate the air bag at a first inflation rate according to historical measurement data.

For example, the MCU of the blood pressure watch may determine whether the air pump can be controlled to inflate the air bag at the first inflation rate by determining whether the historical static pressure interval is stable according to the historical measurement data.

If the MCU determines that the historical static pressure interval is stable, it means that the blood pressure watch can more accurately predict the static pressure value (e.g. pressure threshold) when the pulse wave signal appears according to the historical measurement data during the current blood pressure measurement, and then the blood pressure watch can control the air pump to inflate the air bag at the first inflation rate, and the following steps S502-S508 can be performed.

If the historical static pressure interval is unstable, it can be considered that the blood pressure watch is difficult to accurately predict the static pressure value (such as a pressure threshold value) when the pulse wave signal appears during the blood pressure measurement, the blood pressure watch can control the air pump to inflate the air bag at a second inflation rate (namely, a normal inflation rate), namely, the blood pressure is measured according to the normal boosting rate until all the characteristic points of the pulse wave signal are extracted.

In the embodiment of the present application, whether the historical static pressure interval is stable may be determined by the following method. For example, referring to fig. 6, the MCU may determine whether the historical static pressure interval is stable according to the historical measurement data stored in the storage unit. The historical measurement data may include: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for many times. For example, the blood pressure watch may determine that the historical static pressure interval is stable when the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes is smaller than the variation threshold in the determination of the historical measurement data. And if the difference of the pressure values of the air bag when the pulse wave signals appear in any two blood pressure measurement processes is larger than the variation threshold, determining that the historical static pressure area is not stable. The variation threshold (for example, 10mmHg) may be preset in the blood pressure watch.

In addition, in some embodiments, the blood pressure watch may determine the pressure threshold and the pressure interval according to the historical measurement data stored in the storage unit after determining that the historical static pressure interval is stable. For specific description of determining the pressure threshold and the pressure interval, reference is made to the description of corresponding contents in the above embodiments, and details are not repeated here. Of course, in other embodiments, the blood pressure watch may also determine the pressure threshold and the pressure interval before determining whether the historical static pressure interval is stable, which is not limited in this embodiment.

S502, the electronic device controls the air pump to inflate the air bag at a first inflation rate.

After the blood pressure measurement is initiated, the air pump may be controlled to inflate the bladder at a first inflation rate. The first inflation rate may be a relatively high rate to achieve that the balloon is controlled to increase pressure at a faster rate of pressure increase before the pulse wave signal occurs to shorten the time for blood pressure measurement.

For example, in conjunction with fig. 6, the MCU may send a first instruction to the air pump control unit, the first instruction being used to instruct the air pump control unit to control the air pump to inflate the airbag at a first inflation rate. The air pump control unit may output a first inflation rate inflation command to the air pump in response to the first command. The air pump may inflate the airbag at a first inflation rate (i.e., perform S601).

It should be noted that, in the embodiment of the present application, the first inflation rate may be preset, or may be calculated by combining historical measurement data.

For example, the MCU may determine the first charge rate based on a pressure threshold and a preset boost time. Wherein the pressure rise time is the time required for the pressure value of the air bag to rise from 0 to the pressure threshold value. For example, the MCU may calculate the pressure-increasing rate of the airbag according to the pressure threshold and the preset pressure-increasing time, and then may obtain the inflation rate, such as the first inflation rate, according to the pressure threshold and the preset pressure-increasing time.

It can be understood that, in the process of blood pressure measurement, for a user with higher blood pressure, the pulse wave signal appears for a longer time, and the boosting time before the pulse wave signal appears occupies most of the whole blood pressure measurement process. In order to shorten the time consumption for measuring the blood pressure of different users, in the embodiment of the present application, the boosting time of the fast boosting process may be set to be fixed, and then the larger the first pressure threshold is, the larger the pressure interval of the fast boosting process is, the larger the corresponding boosting rate is, which means that the first inflation rate is also increased. Correspondingly, the smaller the first pressure threshold, the smaller the pressure increase rate, and the lower the first air charge rate during rapid pressure increase. Therefore, the blood pressure value of the user can be accurately measured in a short time for the user with high blood pressure and frequent blood pressure measurement.

In the embodiment of the present application, the determining whether the historical static pressure interval is stable, the determining the pressure threshold, and the determining the first inflation rate according to the pressure threshold may be performed after receiving the operation of the current blood pressure measurement of the user, or may be completed before receiving the operation of the blood pressure measurement of the user. This is not limited by the present application.

In the process that the electronic equipment controls the air pump to inflate the air bag at the first inflation rate, the electronic equipment can judge whether the pulse wave signals appear or not to determine whether the rapid pressure boosting stage needs to be ended or not to enable the air bag to recover to the normal pressure boosting rate, so that the electronic equipment can accurately detect the pulse wave signals. In the present embodiment, the electronic apparatus may realize the determination whether the pulse wave signal is present by performing S503a or S503 b.

S503a, the electronic device judges whether the pressure value of the airbag at the current moment is larger than the pressure threshold value in the process of controlling the air pump to inflate the airbag at the first inflation rate.

Wherein the pressure threshold may be determined from historical measurement data. The historical measurement data may include: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for many times. And the pressure threshold value can be the minimum pressure value of the air bag when the pulse wave signal appears in the historical blood pressure measurement processes.

Illustratively, in combination with fig. 6, in the process that the blood pressure watch controls the air pump to inflate the air bag at the first inflation rate, the pressure sensor may detect the pressure value of the air bag in real time and transmit the detected pressure value of the air bag to the MCU. Then, the MCU can judge whether the pressure value of the air bag at the current moment is larger than the pressure threshold value. When the pressure value of the airbag at the current time is greater than the pressure threshold, the electronic device may determine that a pulse wave signal has occurred or that the pulse wave signal may occur within a short time after the current time, and then S504 may be performed. Otherwise, when the pressure value of the airbag at the current moment is smaller than the pressure threshold, the electronic device may determine that the pulse wave signal does not appear, and at this time, the electronic device may continue to control the air pump to inflate the airbag at the first inflation rate, that is, continue to execute the above S502.

S503b, the electronic device detects the pressure signal of the air bag during the process of controlling the air pump to inflate the air bag at the first inflation rate, and determines whether the pulse wave signal can be extracted from the detected pressure signal.

When a pulse wave signal can be extracted from the detected pressure signal, the electronic device determines that the pulse wave signal appears, and executes the following step S504;

when the pulse wave signal cannot be extracted from the detected pressure signal, the electronic device determines that the pulse wave signal does not appear, and returns to execute S502.

For example, as shown in fig. 6, while the MCU sends a first command to the air pump control unit to control the air pump to inflate the airbag at a first inflation rate, the pressure sensor may detect a pressure value in the airbag in real time and feed back the pressure value to the MCU in real time. MCU alright according to the pressure value of the gasbag of the real-time feedback of above-mentioned pressure sensor pressure signal that obtains the gasbag, and then judge whether pulse wave signal appears. When the pulse wave signal is present, the MCU may control the electronic device to continue to perform S504 below, and when it is confirmed that the pulse wave signal is not present, the MCU may continue to inflate the air bladder at the first inflation rate, i.e., return to perform S502 above.

It should be noted that, as to whether the pulse wave signal can be extracted, in the embodiment of the present application, it is subject to the fact that the pulse wave signal can provide effective measurement information. For example, similar to the description in the embodiment S302 shown in fig. 3, the description is omitted here.

And S504, the electronic device controls the air pump to inflate the air bag at a second inflation rate, wherein the second inflation rate is smaller than the first inflation rate.

It can be seen that, after the pulse wave signal appears, the blood pressure watch can control the air pump to inflate the air bag at the second inflation rate in order to extract the pulse wave signal more accurately. Wherein the second inflation rate is less than the first inflation rate. Thus, after the pulse wave signal occurs, the rapid pressure-increasing phase of inflating the airbag at the first inflation rate is ended, and the normal pressure-increasing phase of inflating the airbag at the second inflation rate is changed. Therefore, the blood pressure watch can control the air bag to quickly boost the pressure before the pulse wave signal appears, and the measurement time before the pulse wave signal appears is shortened. Meanwhile, the electronic equipment can also control the air bag to boost at a normal speed after the pulse wave signal appears, and the pulse wave signal can be extracted more conveniently and accurately.

Illustratively, in conjunction with fig. 6, the MCU may send a second instruction to the air pump control unit, where the second instruction is used to instruct the air pump control unit to control the air pump to inflate the airbag at a second inflation rate. The air pump control unit may output a second inflation rate inflation command to the air pump in response to the second command. The air pump may inflate the airbag at a second inflation rate (i.e., perform S602).

And S505, after controlling the air pump to inflate the air bag at the second inflation rate, the electronic equipment detects the pressure value of the air bag.

Similar to the description in this embodiment S503a, in conjunction with fig. 6, after the electronic device controls the air pump to start inflating the air bag at the second inflation rate, the pressure sensor may detect the pressure value of the air bag in real time and transmit the detected pressure value of the air bag to the MCU.

And S506, for each pressure interval in the at least one pressure interval, the electronic device controls the air pump to inflate the air bag at a third inflation rate from the moment that the pressure value of the air bag is equal to the minimum value of the pressure interval, and controls the air pump to inflate the air bag at a second inflation rate again until the pressure value of the air bag is equal to the maximum value of the pressure interval. Wherein the third inflation rate is less than the second inflation rate.

It can be understood that, for each pressure interval in at least one pressure interval, when the pressure value of the airbag at the current time is within the pressure interval, there is a high probability in the pressure signal of the airbag to extract the feature point of the pulse wave signal. For example, when the pressure value of the airbag is within the pressure interval, the MCU may send a third instruction to the air pump control unit, where the third instruction is used to instruct the air pump control unit to control the air pump to inflate the airbag at a third inflation rate. The air pump control unit may output a third inflation rate inflation command to the air pump in response to the third command. The air pump may inflate the airbag at a third inflation rate (i.e., perform S603). Wherein the third inflation rate is less than the second inflation rate. That is, when the characteristic point possibly including the pulse wave signal in the pressure signal of the air bag is determined, the blood pressure watch controls the air bag to boost pressure at a rate smaller than the normal boosting rate, so that the time for extracting the characteristic point can be further prolonged, and the accuracy of extracting the characteristic point can be improved.

Illustratively, as shown in fig. 4, it is assumed that at least one pressure interval determined by the blood pressure watch from the historical data includes [ P2, P2'] [ P3, P3' ]. When the pressure value of the air bag is smaller than P1, as shown in signal 1 in fig. 4, the pulse wave signal does not appear, and the blood pressure watch controls the air bag to quickly increase the pressure. When the pressure value of the air bag is larger than P1, as shown in signal 2 of fig. 4, a pulse wave signal appears (as the M1 of the pulse wave signal appears), and the blood pressure watch controls the air bag to start boosting at a normal boosting rate. When the pressure value of the air bag is greater than P1 and less than P2 (as signal 2A), the characteristic point M2 is not present, and the blood pressure watch can control the air bag to boost pressure at a normal speed. When the pressure value of the air bag is greater than P2 and less than P2' (as signal 2B), the characteristic point M2 has a greater probability of occurring, and then the blood pressure watch can control the air bag to boost pressure at a slower rate. When the pressure value of the air bag is greater than P2' and less than P3, the characteristic point M2 is extracted and the blood pressure watch controls the air bag to return to normal speed pressure increase. Similarly, when the pressure value of the air bag is greater than P3 and less than P3', the characteristic point M3 has a greater probability of occurring, and the blood pressure watch can control the air bag to boost pressure at a slower rate. And repeating the steps until all the required characteristic points are extracted.

It should be noted that, in the above example, the pressure of the air bag is controlled to be increased at a rate smaller than the normal pressure increase rate when the pressure value of the air bag is within the pressure range, so as to improve the accuracy of the feature point extraction. In another embodiment, when the pressure value of the airbag is within the pressure interval, the electronic device may also control the airbag not to boost pressure, i.e., the boosting rate is 0. In this embodiment, the electronic device may acquire a time interval in which the feature point may appear. The time interval may be determined from historical measurement data. The historical measurement data may include time intervals in which a plurality of feature points may occur. The electronic equipment can judge whether the current moment is in the time interval to adjust the pressure increasing rate of the air bag, so that the feature points can be accurately extracted.

Illustratively, as shown in fig. 4, it is assumed that at least one time interval determined by the blood pressure watch from the historical data includes [ T2, T2'] £ T3, T3' ]. When the current time is less than T1, as shown in signal 1 in the static pressure signal in fig. 4, the pulse wave signal does not appear, and the blood pressure watch controls the air bag to quickly increase the pressure. When the current time is greater than T1, as shown by signal 2 in fig. 4, a pulse wave signal appears (as shown by M1 in fig. 4), and the blood pressure watch controls the air bag to start boosting at a normal boosting rate. When the current time is greater than T1 and less than T2 (as signal 2A), feature point M2 has not occurred and the blood pressure watch controls the air bag to boost pressure at a normal rate. When the current time is greater than T2 and less than T2' (e.g., signal 2B), there is a greater chance that feature point M2 will occur, and the blood pressure watch will control the bladder to boost pressure at a slower rate, or not boost pressure. When the current time is greater than T2' and less than T3, the characteristic point M2 is already extracted, and the blood pressure watch controls the air bag to return to normal speed for pressure increase. Similarly, when the current time is greater than T3 and less than T3', there is a greater chance that feature point M3 will occur and the blood pressure watch will control the bladder to increase pressure at a slower rate, or not. And repeating the steps until all the required characteristic points are extracted.

The two methods can realize the blood pressure measuring method provided by the embodiment of the application, shorten the blood pressure measuring time and improve the accuracy of blood pressure measurement. The embodiment of the present application does not limit which of the above two methods is selected for execution.

And S507, the electronic equipment acquires a pulse wave signal and a static pressure signal according to the pressure signal detected after the airbag is inflated at the second inflation rate.

Illustratively, similar to the description in this embodiment S503a, in conjunction with fig. 6, after the electronic device controls the air pump to start inflating the air bag at the second inflation rate, the pressure sensor may detect the pressure value of the air bag in real time and transmit the detected pressure value of the air bag to the MCU.

In the embodiment of the application, the electronic device may continuously detect the pressure value of the air bag from the beginning of the blood pressure measurement, and generate the pressure signal according to the detected pressure value from the beginning of the blood pressure measurement. However, since the pulse wave signal is likely to occur after the pressure value of the air bag is equal to P1, the electronic device may analyze only the pressure signal after controlling the air pump to inflate the air bag at the second inflation rate, i.e., the pressure signal from the time when the pressure value of the air bag is equal to P1, so as to extract the pulse wave signal and the static pressure signal. Of course, in some embodiments, the electronic device may not generate the pressure signal before the pulse wave signal appears, but may start generating the pressure signal after controlling the air pump to inflate the airbag at the second inflation rate, and analyze the pressure signal to extract the pulse wave signal and the static pressure signal. In other embodiments, after the pulse wave signal appears, the characteristic point may not appear, and the blood pressure value of the user can be determined only if the extracted pulse wave signal contains the characteristic point, so that the pressure signal is not generated before the characteristic point of the pulse wave signal of the electronic device appears, but the pressure signal is generated after the air pump is controlled to inflate the air bag at the third inflation rate for the first time, and the pressure signal is analyzed to extract the pulse wave signal and the static pressure signal.

S508, the electronic equipment determines the blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point.

For example, after acquiring the pulse wave signal, the electronic device may extract feature points of the pulse wave signal related to the blood pressure from the pulse wave signal, calculate the time when the diastolic pressure and the systolic pressure occur through the feature points of the pulse wave signal, map the time into the static pressure signal, and obtain the static pressure value corresponding to the feature points, thereby acquiring the blood pressure value of the user, for example, the diastolic pressure and the systolic pressure of the user.

For example, the static pressure values corresponding to the characteristic points of the common pulse wave signals and the definition thereof are shown in table 2.

TABLE 2

For example, a large number of characteristic points of the pulse wave signal, such as the maximum amplitude a (mp) of the pulse wave, may be extracted from the pulse wave signal, and the corresponding envelope amplitude a (sp) may be determined by integrating the pulse wave corresponding to a (mp) and dividing by the fluctuation period, so that the systolic pressure of the user may be obtained according to the static pressure value in the static pressure signal corresponding to the envelope amplitude a (sp). The difference between a (mp) and a (sp) may correspond to the envelope amplitude of a (dp), i.e. a (dp) ═ a (mp) -a (sp). And obtaining the diastolic pressure of the user according to the static pressure value in the static pressure signal corresponding to the envelope amplitude A (DP). According to the method provided by the embodiment of the application, the blood pressure watch can detect the pressure value of the air bag in real time through the pressure sensor and feed the pressure value back to the MCU, and the MCU can obtain an original signal according to the relation between the pressure value of the air bag and time. The MCU can analyze the above original signals to obtain static pressure signals and pulse wave signals as shown in fig. 4, wherein, for each signal point in the pulse wave signals, the signal point can be in one-to-one correspondence with the pressure value of the air bag in the static pressure signal at the same time. Then, the MCU determines the position and the occurrence time of each feature point according to the pulse wave signal, and obtains the static pressure value corresponding to each feature point by referring to the static pressure signal, such as the static pressure value corresponding to the maximum amplitude of the pulse wave.

When the maximum amplitude a (mp) of the pulse wave cannot be accurately extracted, the diastolic pressure and the systolic pressure of the user can be obtained by combining the feature points of other pulse wave signals shown in table 2. This application is not described in detail herein.

The blood pressure measuring method provided by the embodiment of the application is combined with a historical data method, and the time for measuring the blood pressure can be remarkably shortened by quickly boosting the pressure section before the pulse wave signal appears. The electronic equipment controls the pressure section of the air bag after the pulse wave signal appears to be boosted at a normal speed, the extraction time of the pulse wave signal is properly prolonged, and the accuracy of extracting the pulse wave signal can be effectively improved. Furthermore, the electronic device controls the air bag to boost or not boost at a slow speed in a pressure section which may appear at the characteristic point of the pulse wave signal, extracts the corresponding pulse wave signal and the static pressure signal, further obtains the blood pressure information of the user, can further prolong the extraction time of the characteristic point of the pulse wave signal, and further achieves the purpose of improving the blood pressure measurement accuracy.

The above description mainly introduces the solutions provided in the embodiments of the present application from the perspective of electronic devices. It is understood that, in order to implement the functions described above, the electronic device includes hardware structures and/or software modules corresponding to the respective functions, and the hardware structures and/or software modules corresponding to the respective functions may form an electronic device. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the electronic device may be divided into the functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of dividing the functional modules according to the respective functions, fig. 7 shows a possible composition diagram of the electronic device involved in the above embodiment, as shown in fig. 7, the electronic device includes: a control unit 701, a judgment unit 702, a determination unit 703, an airbag 704, and an air pump 705. For example, the control unit 701, the judgment unit 702, and the determination unit may be the MCU shown in fig. 2, the airbag 704 may be the airbag 205 shown in fig. 2, and the air pump 705 may be the air pump 204 shown in fig. 2.

The control unit 701 is configured to control the air pump 705 to inflate the airbag 704 at a first inflation rate. Illustratively, the control unit 701 may be configured to perform S301 of the blood pressure measuring method shown in fig. 3 described above. The control unit 701 may also be configured to execute S502 of the blood pressure measurement method shown in fig. 5 described above.

A determination unit 702, configured to determine whether a pulse wave signal is present during the process of controlling the air pump 705 to inflate the air bag 704 at the first inflation rate. For example, the determining unit 702 may be configured to execute S302 of the blood pressure measuring method shown in fig. 3. The determination unit 702 may also be used to execute S503a or S503b of the blood pressure measurement method shown in fig. 5 described above.

The control unit 701 is further configured to control the air pump 705 to inflate the air bag 704 at a second inflation rate when the pulse wave signal is determined to be present, wherein the second inflation rate is smaller than the first inflation rate. Illustratively, the control unit 701 may also be configured to perform S303 of the blood pressure measuring method shown in fig. 3 described above. The control unit 701 may also be configured to execute S504 of the blood pressure measurement method shown in fig. 5 described above.

The determining unit 703 is configured to obtain a pulse wave signal and a static pressure signal in real time according to the pressure signal detected after the airbag 704 is inflated at the second inflation rate, and determine a blood pressure value of the user according to at least one feature point in the pulse wave signal and the static pressure signal corresponding to the feature point. The determination unit 703 may be further configured to perform the above-mentioned S304, S305 of the blood pressure measurement method shown in fig. 3. The determination unit 703 may also be configured to execute S508 of the blood pressure measurement method shown in fig. 5.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again. The electronic device provided by the embodiment of the application is used for executing the blood pressure measuring method, so that the same effect as the blood pressure measuring method can be achieved.

In the case of dividing each functional module by corresponding functions, fig. 8 shows another possible composition diagram of the electronic device involved in the above embodiment, as shown in fig. 8, the electronic device includes: a control unit 801, a judgment unit 802, a determination unit 803, a detection unit 804, an air bag 805, and an air pump 806. With reference to fig. 2, the control unit 801, the judgment unit 802, the determination unit 803, and the detection unit 804 may also be the MCU201 shown in fig. 2, the airbag 805 may also be the airbag 205 shown in fig. 2, and the air pump 806 may also be the air pump 204 shown in fig. 2.

A determining unit 802, configured to determine that the air pump 806 can be controlled to inflate the air bag 805 at the first inflation rate when it is determined that the difference between the pressure values of the air bag 805 when the pulse wave signal occurs in any two blood pressure measurement processes in the historical measurement data is smaller than the variation threshold, and then the control unit 801 controls the air pump 806 to inflate the air bag 805 at the first inflation rate. The historical measurement data may include: the pressure value of the air bag 805 when the pulse wave signal appears in the process of measuring the blood pressure for a plurality of times. For example, the determining unit 803 may be configured to execute the above S501 shown in fig. 5.

If the determining unit 802 determines that the difference between the pressure values of the air bag 805 when the pulse wave signal occurs in any two blood pressure measurement processes in the historical measurement data is greater than the variation threshold, the control unit 801 controls the air pump 806 to inflate the air bag 805 at the second inflation rate.

The determining unit 803 is further configured to determine the first inflation rate according to the pressure threshold and a preset pressure rise time, where the pressure rise time is a time required for the pressure value of the airbag 805 to rise from 0 to the pressure threshold.

The control unit 801 is further configured to control the air pump 806 to inflate the bladder 805 at a first inflation rate. Illustratively, the control unit 801 may be configured to execute S502 shown in fig. 5 described above.

The determining unit 803 is further configured to determine a pressure threshold according to the historical measurement data. Wherein the historical measurement data comprises: the pressure value of the air bag 805 when the pulse wave signal appears in the process of measuring the blood pressure for a plurality of times, and the pressure threshold value is the minimum pressure value of the air bag 805 when the pulse wave signal appears in the process of measuring the blood pressure for a plurality of times in history.

The detection unit 804 is configured to detect a pressure value of the air bag 805 during the process of controlling the air pump 806 to inflate the air bag 805 at the first inflation rate. The determining unit 802 is configured to determine whether a pressure value of the air bag 805 at the current time is greater than a pressure threshold. When the pressure value of the air bag 805 at the current moment is larger than the pressure threshold value, the pulse wave signal is determined to be present, and when the pressure value of the air bag 805 at the current moment is smaller than the pressure threshold value, the pulse wave signal is determined not to be present. Illustratively, the detecting unit 804 and the judging unit 802 may be configured to perform S503a shown in fig. 5.

The detecting unit 804 is further configured to detect a pressure signal of the air bag 805 during the process of controlling the air pump 806 to inflate the air bag 805 at the first inflation rate. A judging unit 802 for judging whether or not a pulse wave signal can be extracted from the detected pressure signal. And when the pulse wave signals cannot be extracted from the detected pressure signals, determining that the pulse wave signals are not present. Illustratively, the detecting unit 804 and the determining unit 802 may be configured to perform S503b shown in fig. 5 described above.

The control unit 801 is further configured to control the air pump 806 to inflate the bladder 805 at a second inflation rate. Wherein the second inflation rate is less than the first inflation rate. Illustratively, the control unit 801 may be configured to execute S504 shown in fig. 5 described above.

The determining unit 803 is further configured to determine at least one pressure interval according to the historical measurement data, where the pulse wave signals included in the detected pressure signals in the at least one pressure interval may include the feature points. Wherein the historical measurement data comprises: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and at least one pressure interval is a set of the pressure values of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

The detection unit 804 is further configured to detect the pressure value of the air bag 805 after controlling the air pump 806 to inflate 805 the air bag at the second inflation rate. Illustratively, the detecting unit 804 may be configured to execute S505 shown in fig. 5.

The control unit 801 is further configured to, for each of the at least one pressure interval, control the air pump 806 to inflate the air bag 805 at the third inflation rate, starting from when the pressure value of the air bag 805 is equal to the minimum value of the pressure interval, and to, when the pressure value of the air bag 805 is equal to the maximum value of the pressure interval, control the air pump 806 to inflate the air bag 805 at the second inflation rate again. Wherein the third inflation rate is less than the second inflation rate. Illustratively, the control unit 801 may be configured to execute S506 shown in fig. 5 described above.

The determining unit 803 is further configured to obtain a pulse wave signal and a static pressure signal according to the detected pressure signal after the airbag is inflated at the second inflation rate. And determining the blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point. For example, the determining unit 803 may be configured to execute the above-mentioned S507 and S508 shown in fig. 5.

It should be noted that all relevant contents of each step related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again. The electronic device provided by the embodiment of the application is used for executing the blood pressure measuring method, so that the same effect as the blood pressure measuring method can be achieved.

In the case of an integrated unit, another possible composition of the electronic device involved in the above embodiments may include: processing module, communication module, gasbag and air pump.

The processing module is used to control and manage actions of the electronic device, e.g., the processing module is used to support the electronic device to perform S301-S305 of FIG. 3, S501-S508 of FIG. 5, and/or other processes for the techniques described herein. The communication module is used to support communication between the electronic device and other network entities, such as the functional modules or network entities shown in fig. 2. The electronic device may also include a memory module for storing program codes and data of the electronic device.

The electronic device provided by the embodiment of the application is used for executing the blood pressure measuring method, so that the same effect as the blood pressure measuring method can be achieved.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a module or a unit may be divided into only one logic function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another apparatus, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that,

the electronic equipment comprises a control unit, a judging unit, a determining unit, an air bag and an air pump;

the control unit is used for controlling the air pump to inflate the air bag at a first inflation rate;

the judging unit is used for judging whether a pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation rate;

the control unit is further used for controlling the air pump to inflate the air bag at a second inflation rate when the judgment unit determines that the pulse wave signal appears, wherein the second inflation rate is smaller than the first inflation rate;

the determining unit is used for acquiring the pulse wave signal and the static pressure signal in real time according to the detected pressure signal after the air bag is inflated at the second inflation rate;

the determining unit is further used for determining a blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point;

the determining unit is further configured to determine at least one pressure interval, where pulse wave signals included in the detected pressure signals in the at least one pressure interval may include feature points; the characteristic points comprise an envelope peak value, an envelope inflection point and an envelope slope maximum point;

the detection unit is also used for detecting the pressure value of the air bag after controlling the air pump to inflate the air bag at the second inflation rate;

for each of the at least one pressure interval, the control unit controls the air pump to inflate the airbag at a third inflation rate starting from a pressure value of the airbag equal to a minimum value of the pressure interval, and controls the air pump to inflate the airbag at the second inflation rate again until the pressure value of the airbag is equal to a maximum value of the pressure interval, wherein the third inflation rate is smaller than the second inflation rate.

2. The electronic device of claim 1,

the detection unit is used for detecting the pressure value of the air bag in the process of controlling the air pump to inflate the air bag at the first inflation rate;

the judging unit is used for judging whether the pulse wave signal appears or not, and comprises the following steps:

the judgment unit is used for judging whether the pressure value of the air bag at the current moment is greater than a pressure threshold value;

when the pressure value of the air bag at the current moment is larger than the pressure threshold value, the pulse wave signal is determined to appear, and when the pressure value of the air bag at the current moment is smaller than the pressure threshold value, the pulse wave signal is determined not to appear.

3. The electronic device of claim 1,

the detection unit is used for detecting a pressure signal of the air bag in the process of controlling the air pump to inflate the air bag at the first inflation rate;

the judging unit is used for judging whether the pulse wave signal can be extracted from the detected pressure signal;

when the pulse wave signals can be extracted from the detected pressure signals, the pulse wave signals are determined to appear, and when the pulse wave signals cannot be extracted from the detected pressure signals, the pulse wave signals are determined not to appear.

4. The electronic device of claim 2,

the determining unit is further configured to determine the pressure threshold according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and the pressure threshold value is the minimum pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

5. The electronic device of claim 1,

the determining unit is further configured to determine the at least one pressure interval according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and the at least one pressure interval is a set of the pressure values of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

6. The electronic device of claim 2 or 4,

the determining unit is further used for determining the first inflation rate according to a pressure threshold value and preset pressure rise time, and the pressure rise time is the time required for the pressure value of the air bag to rise from 0 to the pressure threshold value.

7. The electronic device of claim 6, wherein before the control unit is configured to control the air pump to inflate the airbag at the first inflation rate, the control unit comprises:

the judging unit is used for judging whether the air pump can be controlled to inflate the air bag at the first inflation rate or not according to historical measurement data, and the historical measurement data comprise: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times;

the control unit is used for controlling the air pump to inflate the air bag at a first inflation rate, and comprises:

the judgment unit is used for determining that the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes in the historical measurement data is smaller than a variation threshold value, and the control unit controls the air pump to inflate the air bag at a first inflation rate;

the judgment unit is used for determining that the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes in the historical measurement data is larger than the variation threshold, and the control unit controls the air pump to inflate the air bag at the second inflation rate.