Blood pressure measuring method and system, electronic equipment and medium

Abstract

The invention relates to the field of blood pressure measurement, and discloses a blood pressure measurement method and system, electronic equipment and a medium. According to the blood pressure measuring method, in the pressure boosting stage of blood pressure measurement, the real-time air pressure value of the air channel communicated with the air bag is detected, and then the air valve driving circuit is controlled according to the real-time air pressure value, for example, when the air pressure of the air bag is low, the air valve can be driven to work through small driving voltage, and when the air pressure of the air bag is high, the air valve driving circuit is controlled. Large driving voltage is adopted to drive the air valve to work. Thus, the driving voltage of the air valve is dynamically adjusted in the boosting process, compared with the mode that the air valve is driven to work by adopting fixed high driving voltage, the air valve can complete work with low power consumption under the condition that the requirement for the air leakage amount is met, and therefore the blood pressure measuring efficiency is improved by optimizing the power consumption consumed in the blood pressure measuring process every time. The overall power consumption of the blood pressure measuring system can be reduced, so that the cruising ability of the wearable device is improved, and the target of long-term blood pressure monitoring is finally achieved.

Description

Technical Field

[0001] The present application relates to the technical field of blood pressure measurement, and in particular to a blood pressure measurement method, system, electronic equipment and medium. Background Art

[0002] At present, with the continuous development of science and technology, wearable devices have become a part of people's lives. People are no longer satisfied with simple monitoring of time and steps, but hope to be able to detect their physical health indicators through wearable devices. For example, blood pressure is a basic physiological indicator of the human body and an important basis for evaluating various diseases. Therefore, wearable devices usually integrate a blood pressure measurement system. Unlike traditional cuff-type blood pressure monitors, wearable blood pressure measurement devices have higher requirements on volume and power consumption.

[0003] Existing wearable blood pressure measurement devices, such as wrist blood pressure measurement devices, can be small in size, but their battery capacity and battery life are greatly restricted, making it difficult to achieve long-term continuous monitoring. Therefore, it is necessary to reduce the power consumption of wearable blood pressure measurement devices and achieve long or even ultra-long battery life. Summary of the invention

[0004] Embodiments of the present application provide a blood pressure measurement method, system, electronic device, and medium.

[0005] In a first aspect, an embodiment of the present application provides a blood pressure measurement method, which is applied to an electronic device, wherein the electronic device includes an air bag and an air valve for measuring blood pressure, and the method includes: the electronic device enters a pressure boosting phase of blood pressure measurement, and obtains a real-time air pressure value in the air bag; determines a real-time driving voltage of the air valve based on the real-time air pressure value and a first deflation condition; and drives the air valve to operate based on the real-time driving voltage.

[0006] It can be understood that in the boost phase of blood pressure measurement, the present application detects the real-time air pressure value in the airbag through a sensor, and then controls the air valve drive circuit according to the real-time air pressure value, so that the real-time driving voltage applied to the air valve by the air valve drive circuit corresponds to the real-time air pressure value. For example, when the air pressure in the airbag is low, a smaller driving voltage can be used to drive the air valve to work, and when the air pressure in the airbag is high, a larger driving voltage can be used to drive the air valve to work. Among them, the real-time driving voltage can be the lowest driving voltage when the air valve meets the first deflation condition (for example, the deflation volume is 0). In this way, the driving voltage of the air valve is dynamically adjusted during the boost process, so that the air valve can complete the work with less power consumption on the basis of meeting the first deflation condition. In this way, by optimizing the power consumption consumed during each blood pressure measurement process, the endurance of the electronic device can be improved, and the goal of long-term blood pressure monitoring can be achieved.

[0007] In a possible implementation of the first aspect above, the real-time driving voltage of the air valve is determined according to the real-time air pressure value and the first deflation condition, including: when the first deflation condition is that the deflation amount of the air valve is less than or equal to the first deflation amount, obtaining the corresponding relationship between the air valve voltage and the airbag air pressure; determining the air valve voltage corresponding to the real-time air pressure value according to the corresponding relationship between the air valve voltage and the airbag air pressure; and determining the air valve voltage corresponding to the real-time air pressure value as the real-time driving voltage of the air valve.

[0008] Among them, the first air leakage amount can be 0, or a value infinitely close to 0. The air leakage amount of the air valve is less than or equal to 0, which can be understood as the air valve not leaking. When the air valve is required not to leak, the correspondence between the air valve voltage and the air bag pressure is obtained. The correspondence between the air valve voltage and the air bag pressure indicates the air valve voltage corresponding to different air bag pressures, and the air valve voltage is the minimum voltage to ensure that the air valve does not leak. Therefore, the air valve voltage corresponding to the real-time air pressure value can be directly determined from the correspondence between the air valve voltage and the air bag pressure, and then determined as the real-time driving voltage of the air valve. In this way, in the boost stage of blood pressure measurement, the air valve can be made to complete the work with less power while ensuring that the air valve does not leak, thereby reducing the power consumption consumed in the blood pressure measurement process.

[0009] In a possible implementation of the first aspect, in the corresponding relationship between the valve voltage and the airbag pressure, as the airbag pressure increases, the valve voltage tends to first decrease and then increase.

[0010] Considering that when the airbag pressure is low, the air valve only needs a small magnetic attraction to block the air leakage hole to ensure that the system does not leak. When the airbag pressure is high, the air valve needs a large magnetic attraction to block the air leakage hole to ensure that the system does not leak. Therefore, in the corresponding relationship between the air valve voltage and the airbag pressure, the air valve voltage first decreases and then increases with the increase of the airbag pressure. In this way, when the driving voltage of the air valve is dynamically adjusted, the driving voltage of the air valve is first reduced and then increased, which can reduce the power loss of the air valve in the initial inflation period, and achieve the purpose of reducing the overall power consumption of the blood pressure measurement system.

[0011] In practice, when calibrating the corresponding relationship between the valve voltage and the airbag pressure, a valve voltage and airbag pressure relationship curve representing the corresponding relationship between the valve voltage and the airbag pressure can be obtained by a curve fitting method.

[0012] In a possible implementation of the first aspect above, the real-time driving voltage of the air valve is determined according to the real-time air pressure value and the first deflation condition, including: when the first deflation condition is that the deflation amount of the air valve is greater than the second deflation amount, obtaining the real-time ideal air pressure value of the airbag; the real-time ideal air pressure value represents the air pressure value corresponding to the airbag when the linear pressure increase condition is met; and the real-time driving voltage of the air valve is determined according to the real-time deviation value between the real-time ideal air pressure value and the real-time air pressure value.

[0013] It can be understood that the linear pressure increase of the airbag helps to improve the accuracy of blood pressure measurement. The present application controls the corresponding amount of deflation released by the air valve by controlling the real-time driving voltage of the air valve, so that the airbag meets the linear pressure increase condition. Therefore, the second deflation amount can be 0, or a value infinitely close to 0. The deflation amount of the air valve is greater than 0, which can be understood as the deflation hole of the air valve is opened and the air valve is deflated. The deflation amount of the air valve is determined by the driving voltage of the air valve. The larger the driving voltage of the air valve, the smaller the deflation amount; the smaller the driving voltage of the air valve, the larger the deflation amount. When the deflation hole of the air valve is opened, the actual deflation amount of the air valve needs to make the airbag meet the linear pressure increase condition. Therefore, the driving voltage of the air valve is controlled by using the deviation value between the real-time ideal air pressure value when the airbag meets the linear pressure increase, so that the air valve is under the corresponding real-time driving voltage, which not only ensures that the air valve completes the work with less power consumption, but also ensures the linear pressure increase of the airbag, which helps to improve the accuracy of blood pressure measurement.

[0014] In a possible implementation of the first aspect above, the electronic device also includes an air pump for measuring blood pressure; the real-time driving voltage of the air valve is determined according to the real-time deviation value between the real-time ideal air pressure value and the real-time air pressure value, including: using a proportional integral differential control algorithm to determine the real-time driving voltage of the air pump and the real-time driving voltage of the air valve according to the real-time deviation value.

[0015] It can be understood that the air valve is used to deflate the airbag, and the air pump is mainly used to inflate the airbag. During the pressure increase stage, the airbag is inflated by the air pump while being deflated by the air valve. As mentioned above, the airbag can be pressurized linearly by controlling the amount of air deflated by the air valve. In practical applications, the airbag can also be pressurized linearly by simultaneously controlling the amount of air deflated by the air valve and the driving voltage of the air pump. In this way, while ensuring the linear pressure increase of the airbag, the air pump can also work in the best working state, further improving the power of the air pump and improving the inflation efficiency of blood pressure measurement.

[0016] In a possible implementation of the first aspect above, the electronic device also includes a first drive circuit for driving the air pump; the method also includes: controlling the drive voltage of the air pump to be the real-time drive voltage of the air pump through a variable power supply control chip in the first drive circuit.

[0017] It is understandable that the first drive circuit is used to drive the air pump to work. Through the variable power supply control chip in the first drive circuit, the drive voltage applied to the air pump can be dynamically adjusted during the boost phase, so that the air pump is in the best working state and the inflation efficiency is improved.

[0018] In a possible implementation of the first aspect above, obtaining the real-time ideal air pressure value of the airbag includes: obtaining a linear pressure boost curve; the linear pressure boost curve includes ideal air pressure values ​​corresponding to different moments; according to the linear pressure boost curve, determining the ideal air pressure value corresponding to the current moment, and obtaining the real-time ideal air pressure value.

[0019] In a possible implementation of the first aspect above, the electronic device also includes a sensor connected to the airbag air path; obtaining the real-time air pressure value in the airbag includes: detecting the air pressure in the airbag through the sensor to obtain the real-time air pressure value.

[0020] It is understandable that, in the boost phase, in order to obtain accurate real-time air pressure values ​​in a timely manner and dynamically adjust the air valve voltage, the sensor can send the detected air pressure values ​​to the processor in real time.

[0021] The sensor may be a differential pressure sensor, which can directly detect the difference between the air pressure inside the airbag and the air pressure outside the airbag (ie, atmospheric pressure), and the difference can more intuitively reflect the degree of expansion of the airbag.

[0022] In a possible implementation of the first aspect above, the electronic device also includes a second drive circuit for driving the gas valve to operate; driving the gas valve to operate according to the real-time drive voltage includes: controlling the drive voltage of the gas valve to be the real-time drive voltage through a variable power supply control chip in the second drive circuit, so that the gas discharge volume of the gas valve meets the first gas discharge condition.

[0023] It can be understood that the second driving circuit is used to drive the gas valve to work. Through the variable power supply control chip in the second driving circuit, the driving voltage applied to the gas valve can be dynamically adjusted during the boost phase, so that the gas valve does not leak air with less power consumption, or the gas valve leaks air according to the required amount of air leakage.

[0024] In the second aspect, an embodiment of the present application provides a blood pressure measurement system, including an air bag, an air valve and a blood pressure measuring device; the blood pressure measuring device is configured to execute the boost phase of the blood pressure measurement and obtain the real-time air pressure value in the air bag; determine the real-time driving voltage of the air valve according to the real-time air pressure value and the first deflation condition; and drive the air valve to work according to the real-time driving voltage.

[0025] In a third aspect, an embodiment of the present application provides a readable medium having instructions stored thereon. When the instructions are executed on an electronic device, the electronic device executes the blood pressure measurement method of the first aspect described above.

[0026] In a fourth aspect, an embodiment of the present application provides an electronic device, the electronic device comprising: a memory for storing instructions executed by one or more processors of the electronic device, and a processor, which is one of the processors of the electronic device, for executing the blood pressure measurement method of the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a wristband device provided in an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the first airbag air pressure and air valve voltage relationship curve provided in the embodiment of the present application;

[0029] Figure 3 is a flow chart of a first blood pressure measurement method provided in an embodiment of the present application;

[0030] Figure 4 is a schematic diagram of a driving voltage control curve provided in an embodiment of the present application;

[0031] Figure 5 is a flow chart of a second blood pressure measurement method provided in an embodiment of the present application;

[0032] Figure 6 is a schematic diagram of a second valve voltage and airbag pressure relationship curve provided in an embodiment of the present application;

[0033] Figure 7 is a schematic diagram of a blood pressure measurement control process provided by an embodiment of the present application;

[0034] Figure 8 is a flow chart of a third blood pressure measurement method provided in an embodiment of the present application;

[0035] Fig. 9 is a flow chart of a blood pressure measurement process control provided by an embodiment of the present application;

[0036] Fig.10 This is a schematic diagram of a PID control process provided by an embodiment of the present application;

[0037] Fig.11 It is a flow chart of a PID control method provided in an embodiment of the present application;

[0038] Fig.12 It is a schematic diagram of the trend of the fourth driving voltage and the fifth driving voltage changing with the airbag pressure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] Various aspects of the illustrative embodiments will be described below using terms commonly employed by those skilled in the art.

[0040] When a wearable device is used to measure blood pressure, an oscillometric method is generally used to measure blood pressure. For example, a blood pressure measurement system in a wearable device generally includes an air bag, an air pump for inflating the air bag, and an air valve for deflation of the air bag.

[0041] In some embodiments, the blood pressure measurement process is as follows: an air bag is tied to a part of a person to be measured, such as a wrist. During the pressure-increasing stage of the measurement, the air pump is turned on. Generally, the air valve is closed to ensure air tightness. For example, the air valve is driven to work by a preset larger fixed driving voltage, so that the air valve increases the magnetic attraction to block the air leakage hole. Then, the air bag is inflated by the air pump to pressurize the air bag to block the blood flow in the human artery. During the pressure-depressurizing stage of the measurement, the air valve is opened and the gas in the air bag is slowly released through the air valve, or the air pump and the air valve are deflated at the same time, so that the human body's pulse wave signal is transmitted to the air bag chamber, generating pressure fluctuations in the air bag chamber. Finally, the user's blood pressure can be obtained by analyzing the air pressure fluctuations in the air bag chamber.

[0042] People hope to achieve long-term blood pressure monitoring by wearing wearable devices. However, due to the size of wearable devices, it is difficult to equip wearable devices with large-capacity batteries, so the battery life is poor. Therefore, how to improve the battery life of wearable devices and use the blood pressure measurement system in wearable devices to achieve long-term blood pressure monitoring is an urgent problem to be solved.

[0043] In order to improve the battery life of wearable devices, in one embodiment, on the one hand, by controlling the core operating mode and resource allocation mode of the processor in the wearable device, for example, during the interval of blood pressure measurement, the processor is put into standby mode and the processor is in a low-power state; on the other hand, by increasing the blood pressure measurement interval, that is, reducing the frequency of blood pressure measurement, the processor is in a low-power state for a longer time, thereby reducing the power consumption of the device. However, by controlling the working mode of the processor, only the power consumption of the processor can be reduced, but the devices that actually consume power are not only the processor, but also devices such as air pumps and air valves. Therefore, this method has very limited optimization of the overall power consumption, and reducing the frequency of blood pressure measurement is not conducive to timely detection of abnormal blood pressure problems.

[0044] To this end, the embodiment of the present application provides a blood pressure measurement method for a blood pressure measurement system in a wearable device. Specifically, when the air bag pressure is low, the air valve only needs a small magnetic attraction to block the air leakage hole to ensure that the system is not deflated. When the air bag pressure is high, the air valve only needs a large magnetic attraction to block the air leakage hole to ensure that the system is not deflated. Therefore, in the boost phase of the blood pressure measurement, the method detects the real-time air pressure value of the air path connected to the air bag through a sensor, and then controls the air valve drive circuit according to the real-time air pressure value, so that the real-time driving voltage applied to the air valve by the air valve drive circuit corresponds to the real-time air pressure value of the air path connected to the air bag. For example, when the air bag pressure is low, a small driving voltage can be used to drive the air valve to work, and when the air bag pressure is high, a large driving voltage can be used to drive the air valve to work. The real-time driving voltage can be the minimum voltage corresponding to the real-time air pressure that meets the deflation requirement of the blood pressure measurement system (for example, the deflation amount is 0, that is, there is no deflation or the deflation amount is less than a preset threshold). In this way, the driving voltage of the air valve is dynamically adjusted during the pressure boosting process. Compared with the method of using a fixed higher driving voltage to drive the air valve, the air valve can complete its work with lower power consumption while ensuring the required air discharge volume. In this way, without affecting the frequency of blood pressure measurement, by optimizing the power consumption consumed in each blood pressure measurement process, the overall power consumption of the blood pressure measurement system can be reduced, thereby improving the battery life of wearable devices and ultimately achieving the goal of long-term blood pressure monitoring.

[0045] The implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0046] First of all, the wearable devices mentioned in this application may include any one of wristband devices (for example, smart watches, smart bracelets, etc.), cuff devices, head-mounted devices, and finger-mounted devices, depending on the different wearing or wearing parts. A blood pressure measurement method of the present application can be applied to any wearable device with a specific blood pressure measurement function. For the sake of convenience in the following description, the wearable device is a wristband device as an example.

[0047] Figure 1 is a schematic diagram of a wristband device 100 provided in an embodiment of the present application. A blood pressure measurement system can be integrated into the wristband device 100 so that the wristband device 100 has a blood pressure measurement function.

[0048] like Figure 1As shown, the wristband device 100 may include a watch body, which is used to implement the main functions of the wristband device 100, such as display, audio playback, communication, blood pressure measurement, etc. The blood pressure measurement system may include a processor integrated in the watch body, a drive circuit 1, an air pump, a sensor, a drive circuit 2, an air valve, a PPG module, and an air bag connected to the watch body. The following will describe each component in the blood pressure measurement system in detail, which will not be repeated here. It should be noted that the present application does not limit the setting method of the blood pressure measurement system in the wearable device. For example, the above-mentioned air pump, sensor and air valve can also be set on the outside of the watch body according to actual needs. Specifically, the sensor can be set inside the air bag. The advantage of integrating some components in the blood pressure measurement system inside the watch body is that it can improve the comfort of the user wearing.

[0049] Reference Figure 1 , the air path between the sensor, the air pump, the air valve and the airbag is connected, and the air pressure value in the air path connected to the airbag is detected by the sensor, so that the real-time air pressure in the airbag can be timely understood during the blood pressure measurement process. In one embodiment, the sensor can be a differential pressure sensor, which can directly detect the difference between the air pressure inside the airbag and the air pressure outside the airbag (i.e., atmospheric pressure), and the difference can more intuitively reflect the degree of expansion of the airbag. Therefore, the real-time air pressure in the airbag mentioned in this application can be understood as the difference between the air pressure inside the airbag and the atmospheric pressure.

[0050] The driving circuit 1 is electrically connected to the air pump and is used to control the working state of the air pump. The driving circuit 1 includes necessary key chips, for example, a power control chip, which is used to control the driving voltage of the air pump, and a peripheral resistor-capacitor circuit, through which the chip is protected to ensure that the chip is within the normal working range and will not be damaged by excessive current shock. In one embodiment, the power control chip can be a variable power control chip, which can adjust the driving voltage of the air pump so that the air pump is in a desired working state. For example, increasing the driving voltage of the air pump can increase the inflation speed of the airbag by the air pump. Compared with the immutable power control chip, the air pump can only be driven to work with a fixed driving voltage, which is not conducive to adjusting the inflation speed of the airbag. Since the control of the inflation speed is the key to improving the accuracy of blood pressure measurement, the driving circuit 1 adopts a variable power control chip to realize the control of the air pump, which helps to improve the accuracy of blood pressure measurement.

[0051] The driving circuit 2 is electrically connected to the air valve, and is used to control the working state of the air valve. Similar to the driving circuit 1, the driving circuit 2 also includes necessary key chips, such as a power control chip, which is used to control the driving voltage of the air valve, and peripheral resistor-capacitor circuits. In one embodiment, the power control chip can be an immutable power control chip, which drives the air valve to work with a fixed driving voltage. Generally, at the beginning of blood pressure measurement, in order to ensure air tightness, the air valve will be driven to work with a higher fixed driving voltage, so that the air valve increases the magnetic attraction to block the air leak. However, since the immutable power control chip can only drive the air valve with a fixed driving voltage, this results in the driving voltage of the air valve being in a higher state during the entire boost phase, that is, the process of slowly increasing the air pressure in the airbag. For example, Figure 2 is a schematic diagram of a curve of relationship between air bag pressure and air valve voltage provided in an embodiment of the present application, such as Figure 2 As shown, the valve voltage, i.e., the driving voltage of the valve, is fixed. However, when the airbag pressure is low, the valve only needs a small magnetic attraction to block the air leakage hole to ensure that the system does not leak. If the driving voltage of the valve is too high, it will lead to waste of power. Therefore, in another embodiment, the power control chip can be a variable power control chip. Through the variable power control chip, when the airbag pressure is low, the valve is driven with the lowest driving voltage possible on the basis of meeting the system leakage requirements. In this way, the power consumption of the valve can be reduced.

[0052] The PPG module refers to a functional module that uses photoplethysmo graphic (PPG) to detect health data such as heart rate, blood oxygen, and blood pressure. The principle of PPG detection is that since the change in the skin's absorption of light is directly related to the change in the blood flow rate in the arteries, as long as the change in the skin's absorption of light is measured, the change in the blood flow rate in the arteries can be deduced, and then the blood pressure value at a certain point in time can be obtained. Generally, the PPG module includes a light emitter (for example, a light emitting diode), a light sensor (for example, a photodiode), an analog front-end chip, and an accelerometer. The PPG detection process is as follows: the light wave is irradiated into the skin through the light emitter, and then the light intensity change is received by the light sensor, and finally the analog signal is converted into a digital signal through the analog front-end chip to obtain the PPG original signal. Among them, the accelerometer can measure the movement state of the human body, and can be used in combination with the light signal as the input of the PPG algorithm. In the later stage of PPG detection, the original signals from the analog front-end chip and the accelerometer can be processed by complex algorithms to generate other biometric data such as heart rate, blood oxygen, and blood pressure. It is understandable that Figure 1The example blood pressure measurement system can measure blood pressure in two different ways, namely, using a PPG module based on photoplethysmography, and using a drive circuit 1, a drive circuit 2, an air pump, an air valve, an air bag, and a sensor based on an oscillometric method. The PPG module can measure blood pressure without an air bag and without compression, but the software and hardware costs are relatively high, and the scope of application is relatively small compared to the oscillometric method. Therefore, the blood pressure measurement system mentioned below mainly refers to a system that uses the oscillometric method to measure blood pressure.

[0053] The processor is electrically connected to the drive circuit 1, the sensor, the drive circuit 2, and the PPG module, respectively. Here, the processor can be a processor in the wristband device 100 for realizing the main function. The processor can receive data sent by any module in the above-mentioned drive circuit 1, the sensor, the drive circuit 2, and the PPG module, process the data accordingly, and send relevant instructions to any module. For example, the processor obtains the real-time air pressure value detected by the sensor (for example, the differential pressure sensor), and determines the minimum driving voltage when the air valve meets the system deflation requirement (for example, requiring no deflation or the deflation amount is 0) according to the real-time air pressure value, and then sends the corresponding instruction to the drive circuit 2, instructing the drive circuit 2 to drive the air valve to work with the minimum driving voltage. For another example, the processor can also send an air pump control instruction to the drive circuit 1, instructing the drive circuit 1 to control the working state of the air pump.

[0054] like Figure 1 The wristband device 100 shown may also include a wristband (not shown), one end of the airbag may be connected to the watch body, and the other end may be connected to the wristband, so that the airbag may be bent and wrapped around the user's wrist together with the wristband during measurement. In one embodiment, the airbag is detachably connected to the watch body, so that the airbag can be flexibly installed and removed according to actual user needs.

[0055] It should be noted that Figure 1 The blood pressure measurement system exemplified in the example includes a drive circuit 1 and a drive circuit 2, which are used to control an air pump and an air valve, respectively. In practical applications, the number of drive circuits can be designed according to the specific structure of the system. For example, when the system includes multiple air pumps or air valves, a corresponding drive circuit can be set for each air valve and each air pump. The present application does not limit the specific structure of the blood pressure measurement system.

[0056] The following is based on Figure 1 The description of the wristband device shown is used to illustrate a specific implementation of a blood pressure measurement method of the present application. The blood pressure measurement method of the present application can be executed by a processor in the wristband device.

[0057] The blood pressure measurement method of the present application can dynamically adjust the driving voltage of the air valve during the pressure boosting process, so that the air valve can complete its work with less power consumption. This can optimize the power consumption consumed in each blood pressure measurement process and reduce the overall power consumption of the blood pressure measurement system, thereby improving the battery life of wearable devices and achieving the goal of long-term blood pressure monitoring.

[0058] This application provides three specific implementations of the blood pressure measurement method. Each specific implementation is described below.

[0059] First, the implementation method of the first blood pressure measurement method is introduced. In the first implementation method, the processor controls the valve to work with different driving voltages at different times during the boost process, realizes dynamic adjustment of the driving voltage of the valve, and ensures that the valve can complete the work with less power consumption.

[0060] Figure 3 is a flow chart of the first blood pressure measurement method provided in the embodiment of the present application, such as Figure 3 As shown, the blood pressure measurement method may include:

[0061] S301: At the first moment of the pressure boosting stage, the driving voltage of the control valve is controlled to be a first driving voltage.

[0062] Among them, the first moment of the boost phase can be the start moment of blood pressure measurement, that is, the moment when the airbag starts to inflate. At this time, the driving voltage for controlling the air valve is the first driving voltage, and the first driving voltage needs to ensure that the air valve does not deflate. For example, the first driving voltage can be the maximum voltage within the driving voltage range that ensures the normal operation of the air valve. It can be understood that when inflation starts, the air valve is powered on at the maximum voltage to ensure that the deflation path is closed and air tightness is ensured.

[0063] As mentioned above, in one embodiment, during the entire boost phase, the valve voltage, i.e., the driving voltage of the valve, remains constant. The relationship curve between the valve voltage and the airbag pressure is as follows: Figure 2 When the airbag pressure is low, for example, below 5Kpa, the air valve only needs a small magnetic attraction to block the air leakage hole, and the possibility of air leakage is low. If the air valve voltage is still at a high state (for example, 3V), it will cause a waste of power consumption.

[0064] Based on this, in one embodiment, at the first moment of the boost phase, the driving voltage of the control valve is the first driving voltage, and at the same time, the driving duration corresponding to the first driving voltage is controlled to be the first duration. It can be understood that the valve works for the first duration under the first driving voltage, and the first duration can be pre-set, for example, a few nanoseconds, a few microseconds, a few milliseconds or a few seconds. In this way, it is only necessary to increase the driving voltage of the valve in a very short time at the beginning of inflation to increase the magnetic attraction to block the air leakage hole, so as to ensure that the air tightness of the entire blood pressure measurement system is good when the air pressure is low at the initial stage of inflation.

[0065] Accordingly, in one embodiment, the processor may send a first instruction to the drive circuit 2, and the drive circuit 2 responds to the first instruction to drive the gas valve to start working.

[0066] In practical applications, specific driving information, such as the first driving voltage, the first duration, etc., can be carried in the first instruction, or pre-burned in the driving circuit 2. In the former method, the processor can flexibly modify the driving information each time the first instruction is sent, so that the driving information such as the first driving voltage or the first duration can be adjusted at any time to meet different blood pressure measurement requirements; in the latter method, since the driving information has been pre-burned in the driving circuit 2, the processor only needs to send a first instruction to instruct the driving circuit 2 to start working, without carrying additional driving information, which can simplify the first instruction and speed up data transmission, thereby improving the efficiency of blood pressure measurement.

[0067] S302: At a second moment in the pressure increasing stage, the driving voltage of the control valve is gradually reduced from the first driving voltage to the second driving voltage.

[0068] Among them, the second moment can be understood as the moment after the first time period has passed from the first moment. From the second moment, it enters the initial inflation stage. As mentioned above, the air pressure is low in the initial inflation stage, and the air valve only needs a smaller driving voltage to ensure that the air leak hole does not leak. Therefore, the processor can control the driving voltage of the air valve to slowly drop from the first driving voltage to the second driving voltage at the second moment of the boost stage. Here, the second driving voltage can be the minimum voltage within the driving voltage range that ensures the normal operation of the air valve. That is, the driving voltage range of the air valve is from the second driving voltage to the first driving voltage, and within this range, the air valve can work normally.

[0069] In one embodiment, the processor may preset a second time period, and the second time period is used to limit the time from the first driving voltage to the second driving voltage. If the time from the first driving voltage to the second driving voltage is too long, that is, in the initial stage of inflation, the valve voltage is still in a high state for a long time, then the purpose of reducing the valve power consumption cannot be achieved.

[0070] Accordingly, in one embodiment, the processor may send a second instruction to the drive circuit 2, and the drive circuit 2 lowers the drive voltage of the gas valve in response to the second instruction.

[0071] In practical applications, specific driving information, such as the second driving voltage, the second duration, etc., can be carried in the second instruction, or pre-burned in the driving circuit 2. The benefits of different methods are mentioned above and will not be repeated here.

[0072] S303: At the third moment of the pressure increasing stage, the driving voltage of the control valve gradually increases from the second driving voltage to the third driving voltage.

[0073] Among them, the third moment can be understood as the moment after the second moment has passed the second time period, or the moment when the driving voltage of the air valve reaches the second driving voltage. Starting from the third moment, entering the middle and late stages of inflation, the airbag gradually increases the pressure to the maximum air pressure and expands to its final shape. In order to ensure that there is no air leakage, the driving voltage of the air valve can be gradually increased to increase the magnetic attraction of the air valve to block the air leakage hole. Here, the third driving voltage can be the first driving voltage, that is, the maximum voltage within the driving voltage range that ensures the normal operation of the air valve.

[0074] In one embodiment, the processor can control the driving voltage of the air valve to gradually increase from the second driving voltage to the third driving voltage at a constant speed. In this way, the constant inflation speed of the airbag can be matched, so that the speed of the air valve pressure increase is not too fast, causing waste of power consumption of the air valve, or the speed is too slow, causing deflation of the air valve.

[0075] Accordingly, in one embodiment, the processor may send a third instruction to the drive circuit 2, and the drive circuit 2 increases the drive voltage of the gas valve in response to the third instruction.

[0076] In practical applications, specific driving information, such as the third driving voltage, the boost speed of the gas valve, etc., can be carried in the third instruction, or pre-burned in the driving circuit 2. The benefits of different methods are mentioned above and will not be repeated here.

[0077] Through the above steps S301 to S303, the processor can control the operation of the gas valve with different driving voltages at different times during the boost phase. In this way, the driving voltage of the gas valve is dynamically adjusted, so that the driving voltage of the gas valve is first reduced and then increased, which can reduce the power loss of the gas valve during the inflation process and achieve the purpose of reducing the overall power consumption of the blood pressure measurement system.

[0078] For example, Figure 4It is a schematic diagram of a driving voltage control curve provided in an embodiment of the present application, which shows the changes in driving voltage at different times during the boost stage. In practical applications, the curve is stored in the processor's memory in advance, and during the boost stage, the processor directly reads the curve from the memory, so that at the first moment (t0), the driving voltage of the control valve is the first driving voltage (V1); at the second moment (t1), the driving voltage of the control valve gradually decreases from V1 to the second driving voltage (V2); at the third moment (t2), the driving voltage of the control valve gradually increases from V2 to the third driving voltage (V3). It is to be noted again that Figure 4 The driving voltage control curve shown is only an example, and the present application does not limit this. For example, in other embodiments, between t0 and t1, V1 may fluctuate up and down; the process of V1 decreasing to V2 may also be a nonlinear decrease; the process of V2 increasing to V3 may also be a nonlinear increase.

[0079] The following describes an implementation of the second blood pressure measurement method. In the second implementation, as mentioned above, the processor can dynamically adjust the driving voltage of the air valve according to the real-time air pressure in the airbag during the pressure increase process to ensure that the air valve can complete its work with less power consumption.

[0080] Figure 5 is a flow chart of a second blood pressure measurement method provided in an embodiment of the present application, such as Figure 5 As shown, the blood pressure measurement method may include:

[0081] S501: During the pressure increasing phase, the real-time air pressure value in the airbag is obtained.

[0082] Reference Figure 1 The sensor connected to the airbag air path is used to detect the air pressure value in the airbag, so that the processor can obtain the real-time air pressure value in the airbag through the sensor.

[0083] In one embodiment, the sensor detects the air pressure in the airbag in real time, and then transmits the real-time detected air pressure value to the processor, and the processor receives the real-time air pressure value from the sensor. It can be understood that the higher the sensor detection frequency, the more accurate the real-time air pressure value obtained by the processor.

[0084] In another embodiment, the sensor does not automatically send the detected air pressure value to the processor, and the processor can obtain the current reading from the sensor as the real-time air pressure value when necessary.

[0085] The present application takes into account that in the boost phase, in order to be able to obtain accurate real-time air pressure values ​​in a timely manner and dynamically adjust the air valve voltage, the former implementation method is adopted, and the sensor automatically sends the real-time detected air pressure value to the processor.

[0086] S502: Determine the real-time driving voltage corresponding to the real-time air pressure value according to the relationship curve between the air valve voltage and the airbag air pressure.

[0087] In a related embodiment, using Figure 2 The relationship curve between the valve voltage and the airbag pressure is shown, in which the valve voltage is fixed and remains at a high state at different airbag pressures, which will cause a waste of valve power when the airbag pressure is low.

[0088] Therefore, the embodiment of the present application defines a new correspondence between the valve voltage and the airbag pressure. In the correspondence between the valve voltage and the airbag pressure, the valve voltage first decreases and then increases as the airbag pressure increases. The reasons and benefits of this trend can be found in the first implementation method of the blood pressure measurement method above, and will not be repeated here.

[0089] In practical applications, the blood pressure measurement system can be calibrated in advance, and a valve voltage and airbag pressure relationship curve that characterizes the corresponding relationship between the valve voltage and the airbag pressure can be obtained through curve fitting. In the valve voltage and airbag pressure relationship curve, the valve voltage corresponding to different airbag pressures is the minimum voltage to ensure that the valve does not leak. In this way, in the boost stage, the processor can directly determine the valve voltage corresponding to the real-time air pressure value in the valve voltage and airbag pressure relationship curve based on the real-time air pressure value as the real-time driving voltage.

[0090] In one implementation, the relationship curve between the valve voltage and the airbag pressure may be stored in the memory of the processor, so as to facilitate quick reading by the processor.

[0091] Figure 6 is a schematic diagram of the relationship curve between the second valve voltage and the airbag pressure provided in the embodiment of the present application. Figure 6 As shown in the figure, when the air valve pressure increases from 0 to 40Kpa, the air valve voltage is first in a higher driving voltage state (for example, 3V) to ensure the air tightness of the system when inflation begins, and then gradually decreases from 3V to about 1.2V to reduce the power loss of the air valve in the initial stage of inflation. Then, as the airbag pressure continues to increase, the air valve voltage gradually increases from 1.2V until it reaches 3V, that is, by increasing the driving voltage of the air valve, the air valve magnetic attraction is increased to avoid air leakage from the leak hole. It should be noted that Figure 6 The specific numerical values ​​involved are merely examples and are not limited in this application.

[0092] In this way, after obtaining the real-time air pressure value, the processor can directly determine the valve voltage corresponding to the real-time air pressure value from the relationship curve between the valve voltage and the airbag pressure, and then use the corresponding valve voltage as the real-time driving voltage. In this way, the processor can dynamically adjust the valve voltage, and during the pressure increase process, drive the valve at the lowest voltage that satisfies the system without air leakage, thereby saving the power loss of the valve when the airbag pressure is low.

[0093] S503: driving the gas valve according to the real-time driving voltage.

[0094] Reference Figure 1 After the processor determines the real-time driving voltage, it transmits the real-time driving voltage to the driving circuit 2. The driving circuit 2 adjusts the driving voltage of the gas valve to the real-time driving voltage through the variable power supply control chip, thereby realizing the driving of the gas valve.

[0095] In one embodiment, each time the processor receives a real-time air pressure value sent by the sensor, it determines a corresponding real-time driving voltage based on a curve of the relationship between the air valve voltage and the airbag air pressure, and then drives the air valve according to the real-time driving voltage.

[0096] In another embodiment, the processor stores the real-time air pressure value sent by the sensor. Specifically, the processor may only store the most recently received real-time air pressure value, that is, overwrite the real-time air pressure value sent in the past; or, the processor may store the most recently received real-time air pressure values ​​in chronological order, and when the number is exceeded, overwrite the real-time air pressure value sent in the past. Regardless of the storage method, the processor can read the most recently received real-time air pressure value at a preset time interval, and then determine the real-time driving voltage corresponding to the most recently received real-time air pressure value based on the relationship curve between the valve voltage and the airbag pressure, and drive the valve according to the real-time driving voltage. Among them, the preset time interval can be greater than or equal to the detection cycle of the sensor.

[0097] Combine the following Figure 7 The above steps S501 to S503 of the present application are described in an overall manner. Figure 7 FIG. 1 is a schematic diagram of a blood pressure measurement control process provided by an embodiment of the present application. Figure 7As shown, the differential pressure sensor, the airbag, the air valve and the air pump are connected to each other by air circuits. First, the differential pressure sensor can obtain the real-time air pressure value in the airbag by detecting the air pressure in the air circuit, and then the differential pressure sensor transmits the real-time air pressure value to the MCU. After the MCU obtains the real-time air pressure value, it determines the corresponding real-time driving voltage according to the relationship curve between the air valve voltage and the airbag air pressure. The real-time driving voltage is the minimum voltage to ensure that the blood pressure measurement system does not leak air under the corresponding real-time air pressure. Then, the MCU controls the drive circuit 2 so that the drive circuit 2 supplies power to the air valve with the real-time driving voltage through its variable power supply control chip. In this way, the air valve can ensure the good air tightness of the system with less power, thereby reducing the overall power consumption of the blood pressure measurement system.

[0098] It can be understood that the first deflation condition mentioned in the present application can be understood in the second embodiment as a situation where the air valve does not deflate, or the deflation amount of the air valve is less than or equal to the first deflation amount, wherein the first deflation amount can be 0, or a value infinitely close to 0.

[0099] The following is an implementation of the third blood pressure measurement method. In the third implementation, the processor can dynamically adjust the driving voltage of the air valve and the driving voltage of the air pump according to the real-time air pressure in the airbag during the pressure increase process, which can not only ensure that the air valve can complete the work with less power consumption, but also ensure the linear pressure increase of the airbag, which is the key to improving the accuracy of blood pressure measurement.

[0100] Figure 8 is a flow chart of a third blood pressure measurement method provided in an embodiment of the present application, such as Figure 8 As shown, the blood pressure measurement method may include:

[0101] S801: During the pressure increase phase, obtain the real-time air pressure value in the airbag.

[0102] This step may refer to the implementation of step S501 above, and will not be described in detail here.

[0103] S802: Determine a real-time deviation value according to the real-time air pressure value and the ideal air pressure value.

[0104] Among them, the real-time deviation value may refer to the pressure deviation value between the ideal air pressure value and the real-time air pressure value. The ideal air pressure value is the air pressure value corresponding to when the airbag meets the linear pressure boost condition. As mentioned above, linear pressure boost means that the air pressure in the airbag rises at a constant rate, which can also be understood as the constant inflation speed of the airbag. In this way, the airbag expands at a constant rate, which can make the received blood pressure signal more stable, thereby helping to improve the accuracy of blood pressure measurement. It can be understood that during the pressure boost stage, the ideal air pressure value of the airbag increases linearly with time.

[0105] In one embodiment, in order to make the airbag meet the linear pressure increase condition, the processor may store a linear pressure increase curve of the airbag, and the linear pressure increase curve includes ideal air pressure values ​​corresponding to different moments. When determining the real-time deviation value, the processor first needs to determine the ideal air pressure value corresponding to the current moment from the linear pressure increase curve according to the current moment, and then compare the ideal air pressure value with the real-time air pressure value to obtain the air pressure deviation value between the two as the real-time deviation value.

[0106] S803: Determine the real-time driving voltage of the air pump and the real-time driving voltage of the air valve according to the real-time deviation value.

[0107] In this step, the processor can use a proportional integral derivative (PID) control algorithm to calculate the real-time driving voltage of the air pump (hereinafter referred to as the fourth driving voltage) and the real-time driving voltage of the air valve (hereinafter referred to as the fifth driving voltage) according to the real-time deviation value. Under the regulation of the fourth driving voltage and the fifth driving voltage, the air pump inflates the airbag with the inflation amount corresponding to the fourth driving voltage, and the air valve deflates the airbag with the deflation amount corresponding to the fifth driving voltage, so that the airbag meets the linear boost condition.

[0108] The air leakage of the air valve is determined by the driving voltage of the air valve; the higher the driving voltage of the air valve, the smaller the air leakage; the lower the driving voltage of the air valve, the larger the air leakage.

[0109] In one embodiment, when the processor uses PID to calculate the fourth drive voltage and the fifth drive voltage according to the real-time deviation value, it can further consider how to put the air pump in the best working state. The air pump works in the best working state, which can further improve the inflation efficiency. The working state of the air pump is adjusted by the drive circuit 1, and the drive circuit 1 can achieve the best working state of the air pump by adjusting the working parameters of the air pump, such as duty cycle, drive voltage, etc. It should be noted that how to set the working parameters of the air pump to achieve the best working state is determined according to the actual application scenario, and this application does not limit the working parameters of the air pump, the best working state, and the specific adjustment method. For example, the air pump can reach the best working state when it works at a preset duty cycle. When the processor uses PID to calculate the fourth drive voltage and the fifth drive voltage according to the real-time deviation value, it first considers the fourth drive voltage required for the air pump to be in the best working state, and then considers the fifth drive voltage required for the airbag to be linearly boosted when the inflation amount is determined.

[0110] It can be understood that the purpose of determining the real-time driving voltage of the air pump and the real-time driving voltage of the air valve according to the real-time deviation value is not only to make the airbag meet the linear boost condition and reduce the power consumption of the air valve, but also to ensure that the air pump works in the best working state, thereby improving the inflation efficiency.

[0111] The following will explain in detail how to use the PID control algorithm to calculate the real-time driving voltage of the air pump and the real-time driving voltage of the air valve, which will not be elaborated here.

[0112] In other implementations, in step S803, only the real-time driving voltage of the gas valve may be adjusted according to the real-time deviation value, so that the gas valve can achieve linear pressure increase.

[0113] S804: driving the air pump according to the real-time driving voltage of the air pump, and driving the air valve according to the real-time driving voltage of the air valve.

[0114] In this step, the processor transmits the real-time driving voltage of the air pump to the driving circuit 1, and then the driving circuit 1 adjusts the driving voltage of the air pump to the corresponding real-time driving voltage through the variable power control chip, so as to drive the air pump. Similarly, the processor transmits the real-time driving voltage of the gas valve to the driving circuit 2, and then the driving circuit 2 adjusts the driving voltage of the gas valve to the corresponding real-time driving voltage through the variable power control chip, so as to drive the gas valve.

[0115] Compared with the second implementation of the blood pressure measurement method above, the air valve is closed during the pressure boosting stage to ensure that the system does not leak air; in the third implementation of the blood pressure measurement method, the air valve will be opened during the pressure boosting stage to leak air. Obviously, the real-time driving voltage of the air valve in the third implementation will be further reduced, thereby further reducing the power consumption of the air valve.

[0116] It can be understood that the first deflation condition mentioned in the present application can be understood as a situation in which the deflation amount of the air valve is greater than the second deflation amount in the third embodiment, wherein the second deflation amount can be 0, or a value infinitely close to 0. The actual deflation amount of the air valve needs to make the airbag meet the linear pressure increase condition.

[0117] Combine the following Fig. 9 The blood pressure measurement control process of steps S801 to S804 is comprehensively described. Fig. 9As shown, when the blood pressure measurement starts, the control valve is powered on at the set maximum voltage to ensure the air tightness of the system; then, the control pump is inflated at a low voltage with a duty cycle of 50% to inflate the airbag; after the inflation starts, the MCU detects the air pressure of the airbag through the differential pressure sensor and calculates the pressure increase rate; in order to control the inflation rate to be constant and ensure that the air pump works at the best efficiency state, the MCU adjusts the driving voltage of the air valve and the air pump through the PID algorithm; then, the processor determines whether the inflation is completed. If not, it returns to the previous step and continues to adjust the driving voltage of the air valve and the air pump; if the inflation is completed, the MCU can deflate through the air valve, or deflate through the air valve and the air pump at the same time. It should be noted that the above-mentioned 50% duty cycle is only an example of the working parameters of the air pump when the air pump is in the best working state, and this application does not limit this.

[0118] The following describes in detail how the processor calculates the fourth driving voltage and the fifth driving voltage using the PID control algorithm.

[0119] First, the basic idea of ​​the PID control algorithm is briefly described: according to the size of the deviation, a control quantity is calculated using proportion, integration, and differentiation, and this control quantity is input into the controlled system. After receiving the input, the system will output a corresponding output quantity, and the PID controller will then detect the output quantity and calculate the deviation again, and then repeat the above process. The processor of the present application can be the above-mentioned PID controller.

[0120] For ease of understanding, combined Fig.10 This chapter describes the specific process of how the processor adjusts the driving voltage of the air valve and air pump through the PID algorithm. Fig.10 As shown, the processor detects the real-time air pressure value in the airbag, and obtains the real-time deviation value after calculating with the ideal air pressure value; then, the processor calculates the control amount according to the real-time deviation value by using proportion, integration and differentiation. Here, the control amount includes the fourth driving voltage and the fifth driving voltage, and the controlled system includes the drive circuit 1, the air pump, the drive circuit 2, the air valve and the airbag; the processor inputs the fourth driving voltage into the drive circuit 1, so that the drive circuit 1 drives the air pump according to the fourth driving voltage, and at the same time, the processor inputs the fifth driving voltage into the drive circuit 2, so that the drive circuit 2 drives the air valve according to the fifth driving voltage, so that the air pump inflates the airbag while the air valve also deflates the airbag. The processor continuously obtains the real-time air pressure value in the airbag and continuously adjusts the driving voltage of the air valve and the air pump so that the airbag always increases the pressure at a constant speed. In this way, during the entire inflation process, the airbag achieves linear pressure increase, and the air pump continues to work in the best state, so that the overall power consumption of the blood pressure measurement system is reduced.

[0121] In one embodiment, the MCU can adjust the driving voltage of the air valve and the air pump through the PID algorithm. Fig.11 In the initial stage of inflation, the MCU controls the driving voltage of the air pump to remain constant, reduces the driving voltage of the air valve, and increases the air valve deflation volume to achieve linear pressure increase of the airbag; after a certain air pressure is inflated, that is, after the airbag reaches a certain air pressure, the MCU controls the driving voltage of the air valve to increase first and then remain constant, increases the driving voltage of the air pump, and continues to increase the pressure linearly until the airbag reaches the target air pressure value. Fig.12 FIG. 4 shows the trend of the fourth driving voltage and the fifth driving voltage changing with the airbag pressure after adjustment in the above manner, wherein the solid line represents the trend of the fourth driving voltage and the dotted line represents the trend of the fifth driving voltage. Fig.12 As shown, when inflation begins, that is, when the airbag pressure is 0, the fourth drive voltage is at a lower position (V4) and the fifth drive voltage is at a higher position (V5); in the process of the airbag pressure gradually rising from 0 to P1, the fifth drive voltage gradually decreases from V5 to V6 to increase the air valve discharge volume, and at the same time, the fourth drive voltage remains constant (V4); starting from P1, in order to ensure the air tightness of the airbag, the drive voltage of the air valve begins to gradually increase, that is, the fifth drive voltage gradually rises from V6 to V5, and then remains constant. When the airbag pressure reaches P2, the drive voltage of the air pump begins to increase, that is, the fourth drive voltage gradually rises from V4 to V7, and the airbag reaches the target pressure value P3. It should be noted that Fig.12 The driving voltage variation curve is only an example, and the present application does not limit the driving voltage variation curve. For example, when the fourth driving voltage increases from V4 to V7, it can be a linear increase or a nonlinear increase; when the fifth driving voltage decreases from V5 to V6, it can be a linear decrease or a nonlinear decrease.

[0122] It should be noted that the first driving circuit mentioned in the present application may be the driving circuit 1 mentioned above, and the second driving circuit may be the driving circuit 2 mentioned above.

[0123] In addition, a blood pressure measurement system provided in an embodiment of the present application includes an air bag, an air valve and a blood pressure measurement device; the blood pressure measurement device is configured to execute any one of the blood pressure measurement methods in the embodiments of the present application.

[0124] It will be understood that, as used herein, the term "module" may refer to or include an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and / or memory that executes one or more software or firmware programs, a combinational logic circuit, and / or other appropriate hardware components that provide the described functionality, or may be part of these hardware components.

[0125] It is understood that in each embodiment of the present application, the processor can be a microprocessor (micro controller unit, MCU), a digital signal processor, a microcontroller, etc., and / or any combination thereof. According to another aspect, the processor can be a single-core processor, a multi-core processor, etc., and / or any combination thereof.

[0126] It should be noted that in the examples and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0127] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims

1. A blood pressure measurement method, characterized in that: Applied to an electronic device, the electronic device includes an air bag and an air valve for measuring blood pressure, and the method includes: The electronic device enters the pressure-increasing stage of blood pressure measurement and obtains the real-time air pressure value in the airbag; Determining a real-time driving voltage of the gas valve according to the real-time gas pressure value and the first deflation condition; The gas valve is driven to operate according to the real-time driving voltage.

2. The method according to claim 1, characterized in that Determining the real-time driving voltage of the gas valve according to the real-time gas pressure value and the first deflation condition includes: When the first deflation condition is that the deflation amount of the air valve is less than or equal to the first deflation amount, obtaining a corresponding relationship between the air valve voltage and the airbag pressure; Determining the valve voltage corresponding to the real-time air pressure value according to the corresponding relationship between the valve voltage and the airbag air pressure; The gas valve voltage corresponding to the real-time gas pressure value is determined as the real-time driving voltage of the gas valve.

3. The method according to claim 2, characterized in that In the corresponding relationship between the valve voltage and the airbag pressure, as the airbag pressure increases, the valve voltage shows a trend of first decreasing and then increasing.

4. The method according to claim 1, characterized in that: Determining the real-time driving voltage of the gas valve according to the real-time gas pressure value and the first deflation condition includes: When the first deflation condition is that the deflation amount of the air valve is greater than the second deflation amount, obtaining a real-time ideal air pressure value of the airbag; the real-time ideal air pressure value represents the corresponding air pressure value when the airbag meets the linear pressure increase condition; The real-time driving voltage of the gas valve is determined according to the real-time deviation value between the real-time ideal gas pressure value and the real-time gas pressure value.

5. The method according to claim 4, characterized in that The electronic device also includes an air pump for measuring blood pressure; Determining the real-time driving voltage of the gas valve according to the real-time deviation value between the real-time ideal gas pressure value and the real-time gas pressure value comprises: The real-time driving voltage of the air pump and the real-time driving voltage of the air valve are determined according to the real-time deviation value by using a proportional-integral-differential control algorithm.

6. The method according to claim 5, characterized in that The electronic device further comprises a first driving circuit for driving the air pump to operate; the method further comprises: The driving voltage of the air pump is controlled to be the real-time driving voltage of the air pump through the variable power supply control chip in the first driving circuit.

7. The method according to claim 4, characterized in that The step of obtaining the real-time ideal air pressure value of the airbag includes: Obtaining a linear pressure-increasing curve; the linear pressure-increasing curve includes ideal air pressure values ​​corresponding to different moments; According to the linear pressure-increasing curve, the ideal air pressure value corresponding to the current moment is determined to obtain the real-time ideal air pressure value.

8. The method according to claim 1, characterized in that: The electronic device also includes a sensor in communication with the air path of the airbag; The obtaining of the real-time air pressure value in the airbag comprises: The air pressure in the airbag is detected by the sensor to obtain the real-time air pressure value.

9. The method according to any one of claims 1 to 8, characterized in that The electronic device further comprises a second driving circuit for driving the gas valve to operate; The step of driving the gas valve to operate according to the real-time driving voltage comprises: The variable power supply control chip in the second driving circuit is used to control the driving voltage of the gas valve to be the real-time driving voltage, so that the air release amount of the gas valve meets the first air release condition.

10. A blood pressure measurement system, characterized in that: It includes an air bag, an air valve and a blood pressure measuring device; The blood pressure measuring device is configured to execute a pressure-increasing phase of the blood pressure measurement, obtain a real-time air pressure value in the airbag; and determine a real-time driving voltage of the air valve according to the real-time air pressure value and a first deflation condition; The gas valve is driven to operate according to the real-time driving voltage.

11. A readable medium, characterized in that: The readable medium stores instructions, which, when executed on an electronic device, enable the electronic device to execute the blood pressure measurement method according to any one of claims 1 to 9.

12. An electronic device, characterized in that: The electronic device comprises: a memory for storing instructions to be executed by one or more processors of the electronic device, and The processor is one of the processors of the electronic device, and is used to execute the blood pressure measurement method according to any one of claims 1 to 9.

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