Blood pressure measuring method, wearable device and storage medium

Abstract

The invention provides a blood pressure measuring method, wearable equipment and a storage medium. The method is applied to the wearable equipment, the wearable equipment comprises a blood pressure measuring device, and the blood pressure measuring device comprises an air bag. In the first time period, the wearable device inflates the air bag and obtains a first pulse wave signal, the air pressure in the air bag is gradually increased along with time in the first time period, and the first pulse wave signal is used for obtaining a first blood pressure measurement value; in a second time period, the wearable device inflates the air bag and obtains a second pulse wave signal, the air pressure in the air bag is kept unchanged or fluctuates in the first range in the second time period, and the second pulse wave signal is used for evaluating the cardiovascular risk; the wearable device outputs a first blood pressure measurement and cardiovascular risk. By means of the method, the wearable device can monitor the cardiovascular disease risk of the user while obtaining the peripheral arterial blood pressure value, and cardiovascular diseases are prevented.

Description

Technical Field

[0001] The present application relates to the field of wearable technology, and in particular to a blood pressure measurement method, a wearable device and a storage medium. Background Art

[0002] With the improvement of living standards, people's physical health has received more and more attention, and cardiovascular diseases among users have become more and more common. Cardiovascular disease is one of the primary factors leading to increased risk of death. Studies have found that hypertension is also one of the risk factors for cardiovascular disease among residents. Monitoring blood pressure and predicting cardiovascular risks are of great significance.

[0003] In order to conveniently monitor blood pressure, there is a wrist-type dynamic blood pressure monitor, which is comfortable to wear and saves time and effort. The wrist-type dynamic blood pressure monitor can monitor the user's blood pressure within 24 hours. The wrist-type dynamic blood pressure monitor can measure blood pressure by oscillometric method. For example, the wrist-type dynamic blood pressure monitor can linearly increase the pressure and inflate, block the blood flow in the artery by air, obtain oscillation waves of different pressures, and then determine the systolic pressure, diastolic pressure and other information. However, the wrist-type dynamic blood pressure monitor cannot predict one or more cardiovascular risks such as heart rate, vascular wall elasticity, cardiac ejection capacity, and peripheral vascular resistance. How to achieve the prediction of cardiovascular risks while monitoring blood pressure with a wrist-type dynamic blood pressure monitor needs further study. Summary of the invention

[0004] The present application provides a blood pressure measurement method, a wearable device and a storage medium, which enable the wearable device to obtain not only the peripheral arterial blood pressure value but also the central arterial pulse wave signal, and monitor the user's cardiovascular disease risk based on the central arterial pulse wave signal to prevent the occurrence of cardiovascular disease.

[0005] In a first aspect, the present application provides a blood pressure measurement method, which is applied to a wearable device, the wearable device including a blood pressure measurement device, the blood pressure measurement device including an airbag, the method including: within a first time period, the wearable device inflates the airbag and obtains a first pulse wave signal, the air pressure in the airbag gradually increases with time during the first time period, wherein the first pulse wave signal is used to obtain a first blood pressure measurement value; within a second time period, the wearable device inflates the airbag and obtains a second pulse wave signal, the air pressure in the airbag remains unchanged during the second time period or the air pressure in the airbag fluctuates within a first range, wherein the second pulse wave signal is used to assess cardiovascular risk; the wearable device outputs the first blood pressure measurement value and cardiovascular risk.

[0006] The first blood pressure measurement value may be a blood pressure value of a part where the wearable device is worn measured by the wearable device. For example, when the wearable device is worn on a user's wrist, the first blood pressure measurement value may be a blood pressure value on the user's wrist.

[0007] The wearable device outputs the first blood pressure measurement value and the cardiovascular risk, which may include the wearable device displaying the first blood pressure measurement value and the cardiovascular risk, or playing the first blood pressure measurement value and the cardiovascular risk by voice, or sending the first blood pressure measurement value and the cardiovascular risk to other devices for display.

[0008] Through this method, the wearable device can not only obtain the peripheral arterial blood pressure value, but also monitor the user's cardiovascular disease risk and prevent the occurrence of cardiovascular disease.

[0009] In combination with the first aspect, in a possible implementation manner, the method also includes: the wearable device obtains a third pulse wave signal based on the second pulse wave signal and the first target model; the wearable device obtains a second blood pressure measurement value based on the first blood pressure measurement value and the third pulse wave signal.

[0010] Among them, the first blood pressure measurement value may be a central arterial blood pressure value. The central arterial blood pressure value may refer to the blood pressure of the aorta, which is the pressure directly faced by the heart and other organs. Since the aorta is closer to the heart and brain, the central arterial blood pressure value is more meaningful for judging the user's blood pressure risk than the peripheral arterial blood pressure value.

[0011] Through this method, the wearable device can obtain the central arterial blood pressure value while obtaining the peripheral arterial blood pressure value.

[0012] In combination with the first aspect, in a possible implementation, cardiovascular risk includes any one or more of the following: heart rate, vascular wall elasticity, cardiac ejection capacity, and peripheral vascular resistance.

[0013] In combination with the first aspect, in a possible implementation, before the wearable device obtains the first blood pressure measurement value based on the first pulse wave signal, the method also includes: within a third time period, the wearable device inflates the airbag and obtains a fourth pulse wave signal, and the air pressure in the airbag gradually increases with time within the third time period; the wearable device splices the first pulse wave signal and the fourth pulse wave signal in chronological order to obtain a fifth pulse wave signal, wherein the fifth pulse wave signal is used to obtain the first blood pressure measurement value.

[0014] Optionally, the wearable device can obtain a first blood pressure measurement value based on the fifth pulse wave signal and the airbag pressure signals corresponding to the first time period and the third time period.

[0015] The wearable device measures blood pressure through a complete inflation-deflation process. During the complete inflation-deflation process, the wearable device can obtain pulse wave signals of multiple linear boost segments. The wearable device can splice the pulse wave signals of multiple linear boost segments into a complete pulse wave signal, and obtain the first blood pressure measurement value based on the complete pulse wave signal.

[0016] In combination with the first aspect, in a possible implementation, before the wearable device outputs the first blood pressure measurement value and cardiovascular risk, the method also includes: within a fourth time period, the wearable device inflates the airbag and obtains a sixth pulse wave signal, and the air pressure in the airbag remains unchanged or the air pressure in the airbag fluctuates within a first range during the fourth time period; the wearable device obtains a second pulse wave signal, specifically including: the wearable device selects a second pulse wave signal with a better signal from the second pulse wave signal and the sixth pulse wave signal.

[0017] Optionally, the wearable device may obtain a third pulse wave signal based on the second pulse wave signal and the first target model; the wearable device may obtain parameter information for assessing cardiovascular risk based on the third pulse wave signal.

[0018] Wearable devices measure blood pressure through a complete inflation-deflation process. During the inflation-deflation process, the wearable device can obtain pulse wave signals of multiple constant pressure control segments.

[0019] In a possible implementation, the wearable device can screen a pulse wave signal with a better signal from the pulse wave signals of multiple constant pressure control segments, and obtain a central pulse wave signal based on the pulse wave signal, and then assess cardiovascular risk based on the central pulse wave signal.

[0020] In other possible implementations, the wearable device can obtain a central pulse wave signal based on the pulse wave signal of each constant pressure control segment, and then evaluate the cardiovascular risk based on each central pulse wave signal, and finally average the multiple cardiovascular risks to obtain the final cardiovascular risk.

[0021] In combination with the first aspect, in a possible implementation, the blood pressure measuring device also includes a driving circuit, a micropump and an air pressure sensor, the driving circuit is used to control the inflation rate of the micropump into the airbag, the air pressure sensor is used to obtain an arterial pulse wave signal, and the deflation rate of the micropump is a first deflation rate; the wearable device inflates the airbag and obtains a first pulse wave signal, specifically including: the wearable device controls the driving circuit to a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, and obtains the first pulse wave signal through the air pressure sensor, wherein the first inflation rate is greater than the first deflation rate.

[0022] In combination with the first aspect, in a possible implementation, the wearable device inflates the airbag and obtains a second pulse wave signal, specifically including: the wearable device controls the driving circuit to a second duty cycle, controls the micropump through the driving circuit to inflate the airbag at a second inflation rate, and obtains the second pulse wave signal through the air pressure sensor, wherein the second duty cycle is less than the first duty cycle, the second inflation rate is less than the first inflation rate, and the second inflation rate is equal to the first deflation rate.

[0023] In combination with the first aspect, in a possible implementation, the blood pressure measurement device also includes an air valve, which is used to discharge the gas in the airbag; in the process of the wearable device acquiring the first pulse wave signal and the second pulse wave signal, the method also includes: the wearable device closing the air valve.

[0024] In some embodiments, the wearable device can control the increase and constancy of the air pressure in the airbag by adjusting the inflation speed of the micropump to obtain the first blood pressure measurement value and cardiovascular risk.

[0025] In combination with the first aspect, in a possible implementation, the blood pressure measurement device further includes a driving circuit, a micro pump, an air pressure sensor, and an air valve, the driving circuit is used to control the inflation rate of the micro pump into the air bag, the air pressure sensor is used to obtain an arterial pulse wave signal, the air valve is used to discharge the gas in the air bag, and the deflation rate of the micro pump is a first deflation rate; the wearable device inflates the air bag and obtains the first pulse wave signal, specifically including:

[0026] The wearable device controls the driving circuit to have a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, closes the air valve, and obtains a first pulse wave signal through the air pressure sensor, wherein the first inflation rate is greater than the first deflation rate.

[0027] In combination with the first aspect, in a possible implementation, the wearable device inflates the airbag and obtains a second pulse wave signal, specifically including: the wearable device controls the driving circuit to have a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, opens the air valve and discharges the gas in the airbag through the air valve at a second deflation rate, wherein the first inflation rate is equal to the sum of the first deflation rate and the second deflation rate.

[0028] In some embodiments, the wearable device can adjust the inflation speed of the micropump to remain constant, and control the deflation speed of the air valve to make the air pressure in the airbag rise and remain constant, so as to obtain the first blood pressure measurement value and cardiovascular risk.

[0029] In combination with the first aspect, in a possible implementation, after the wearable device acquires the first pulse wave signal and the second pulse wave signal, the method further includes: the wearable device opens an air valve and discharges the gas in the airbag through the air valve.

[0030] In this way, after the blood pressure measurement is completed, the wearable device can open the valve to speed up the discharge of gas in the air bag.

[0031] In a second aspect, the present application provides a wearable device, comprising a blood pressure measuring device, a memory, and a processor; wherein the blood pressure measuring device, the memory, and the processor are coupled, the memory is used to store a computer program, and when the processor executes and calls the computer program, the wearable device executes a blood pressure detection method provided in any possible implementation of any of the above aspects.

[0032] In a third aspect, the present application provides a computer-readable storage medium comprising instructions. When the instructions are executed on a wearable device, the wearable device executes a blood pressure detection method provided in any possible implementation of any of the above aspects.

[0033] In a fourth aspect, the present application provides a chip system, which includes one or more processors, and the processor is used to call computer instructions to execute a blood pressure detection method provided in any possible implementation of any of the above aspects.

[0034] In a fifth aspect, the present application provides a computer program product comprising instructions. When the above-mentioned computer program product is run on a wearable device, the wearable device executes a blood pressure detection method provided in any possible implementation of any of the above-mentioned aspects.

[0035] For the description of the beneficial effects of the second to fifth aspects, reference may be made to the description of the beneficial effects in the first aspect, and this application will not repeat them here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram showing a user wearing a wearable device 100 is shown;

[0037] Figure 2 A schematic diagram of the structure of the wearable device 100 is shown;

[0038] Figure 3 1 shows a schematic diagram of the hardware structure of the wearable device 100;

[0039] Figure 4 A schematic diagram of the structure of a blood pressure measurement device 213 provided in the present application is shown;

[0040] Figure 5 A schematic diagram of the structure of an air bag, an air pump and an air path conducting component provided in an embodiment of the present application;

[0041] Figure 6A schematic diagram showing five linear boost sections and four constant voltage control sections acquired by the wearable device 100 is shown;

[0042] Figure 7 A schematic diagram showing the duty cycle corresponding to the driving circuit 213B in the linear boost section and the constant voltage control section is shown;

[0043] Figure 8 A schematic diagram showing the average pressure increase rate in the airbag 213G in the linear pressure increase section and the constant pressure control section is shown;

[0044] Fig. 9 A schematic flow chart of a method for a wearable device 100 to obtain N linear boost sections and N constant voltage control sections is shown;

[0045] Fig.10 A schematic diagram showing the duty cycle corresponding to the driving circuit 213B in the linear boost section and the constant voltage control section is shown;

[0046] Fig.11 The average pressure increase rate in the airbag 213G in the linear pressure increase section and the constant pressure control section is shown;

[0047] Fig.12 A schematic flow chart of another method for a wearable device 100 to obtain N linear boost sections and N constant voltage control sections is shown;

[0048] Figure 13-Figure 14 A schematic diagram of obtaining a complete peripheral arterial pulse wave signal is shown;

[0049] Fig.15 A schematic diagram of how to obtain a peripheral arterial blood pressure value provided in an embodiment of the present application;

[0050] Figure 16-Figure 17 A schematic diagram of obtaining a central artery pulse wave signal is shown;

[0051] Fig.18 A schematic diagram showing a central artery pulse wave signal acquired within one cycle is shown;

[0052] Fig.19 A schematic diagram showing the acquisition of peripheral arterial pulse wave signals by a PPG module is shown;

[0053] Figure 20A-20B A set of schematic diagrams are shown;

[0054] Figure 21A-Figure 21C A schematic diagram showing a wearable device 100 displaying blood pressure measurement values ​​and parameter information for assessing cardiovascular diseases;

[0055] Fig. 22 A schematic diagram of a blood pressure measurement method provided in this application. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0057] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0058] The term "user interface (UI)" in the following embodiments of the present application refers to a medium interface for interaction and information exchange between an application or operating system and a user, which realizes the conversion between the internal form of information and the form acceptable to the user. A common form of user interface is a graphical user interface (GUI), which refers to a user interface related to computer operation displayed in a graphical manner. It can be a visual interface element such as text, icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, widgets, etc. displayed on the display screen of an electronic device.

[0059] With the development of electronic technology, the functions of wearable devices are constantly enhanced. For example, wearable devices such as bracelets and watches can provide blood pressure measurement functions, helping users measure their blood pressure anytime and anywhere, and then understand their physical condition.

[0060] The present application can measure blood pressure with the aid of the oscillometric method-upper air method. While obtaining the peripheral arterial blood pressure value, the wearable device 100 can also add one or more constant pressure control segments, and the air pressure in the airbag in the constant pressure control segment remains unchanged. The wearable device 100 can obtain the peripheral arterial pulse wave signal in one or more constant pressure control segments, and obtain the central arterial pulse wave signal based on the peripheral arterial pulse wave signal in one or more constant pressure control segments. The wearable device 100 can perform feature analysis on the central arterial pulse wave signal to obtain parameter information for assessing cardiovascular risk. The parameter information used to assess cardiovascular risk includes but is not limited to; heart rate, vascular wall elasticity, cardiac ejection capacity, peripheral vascular resistance, etc.

[0061] In some embodiments, the peripheral arterial pulse wave signal may also be referred to as a peripheral pulse wave signal. The central arterial pulse wave signal may also be referred to as a central pulse wave signal.

[0062] It should be noted that the air pressure in the airbag in the constant pressure control section can remain unchanged or fluctuate within a certain range. For example, when the air pressure at the constant pressure control point is 90 mmHg, the air pressure in the airbag in the constant pressure control section can fluctuate within the range of 85 mmHg-95 mmHg.

[0063] In some embodiments, the wearable device can also obtain a central arterial blood pressure value based on the peripheral arterial blood pressure value and the central arterial pulse wave signal, and the central arterial blood pressure value can better reflect the user's actual blood pressure value.

[0064] Among them, the oscillometric method-upward air method can refer to obtaining the continuous change of arterial pressure with inflation pressure through linear pressure increase, realizing blood pressure measurement by blocking arterial blood flow, and calculating peripheral arterial blood pressure value and other data.

[0065] The peripheral arterial blood pressure value may include peripheral arterial systolic pressure, peripheral arterial diastolic pressure, and peripheral arterial mean pressure. The peripheral arterial blood pressure value may be a blood pressure value of the wearing part detected by the wearable device 100. For example, if the wearable device 100 is worn on the user's wrist, the peripheral arterial blood pressure value may be a blood pressure value of the wrist detected by the wearable device 100.

[0066] Central arterial blood pressure values ​​may include central arterial systolic pressure, central arterial diastolic pressure, and central arterial mean pressure. Central arterial blood pressure values ​​may refer to the blood pressure of the aorta, which is the pressure directly faced by the heart and other organs. Since the aorta is closer to the heart and brain, central arterial blood pressure values ​​are more meaningful for judging the user's blood pressure risk than peripheral arterial blood pressure values.

[0067] Through this method, the wearable device 100 can not only measure the user's central arterial blood pressure value and improve the accuracy of blood pressure measurement, but also obtain the central arterial pulse wave signal, and monitor the user's cardiovascular disease risk based on the central arterial pulse wave signal to prevent the occurrence of cardiovascular disease.

[0068] Next, a wearable device 100 provided in the present application and usable for measuring blood pressure is introduced.

[0069] Figure 1 A schematic diagram showing a user wearing a wearable device 100 is shown.

[0070] like Figure 1 As shown, the user can wear the wearable device 100 on the user's wrist.

[0071] Figure 2 A schematic diagram of the structure of the wearable device 100 is shown.

[0072] like Figure 2 As shown, the wearable device 100 may include a watch body 201 and a wearable component 202 .

[0073] The watch body 201 is provided with a motion sensor, such as a gyroscope sensor and an acceleration sensor, and the motion sensor is used to collect motion data and determine the user state based on the motion state obtained by analyzing the motion data.

[0074] The watch body 201 may include a display screen 203. The display screen 203 may be used to display the time, the power level of the watch body 201, the Bluetooth logo, received messages, and user motion data. The display screen 203 may be used to receive a user click operation to light up the display screen, start and end a motion mode, and the like. The display screen 203 may also record the number of steps moved by the user, the calories consumed, and may have basic functions such as call reminders and message notifications. In a possible implementation, the watch body 201 may establish a wireless communication connection with the wearable device 100 via Bluetooth. The watch body 201 may send the user's motion data to the wearable device 100 to which the connection is established. Furthermore, when the wearable device 100 receives an incoming call or message notification, the watch body 201 may receive an instruction from the mobile phone to remind the user that there is an incoming call or message notification.

[0075] The wearable component 202 is used to mount the watch body 201. For example, the wearable component 202 may be a device such as a wristband or a watch strap. The wearable component 202 is a device that allows the device watch body 201 to be attached to the user's wrist. The wearable device 100 is attached to the user's wrist, so that the inertial sensor can collect the motion data of the user's wrist to monitor the movement of the user's wrist to determine the user's posture.

[0076] When the wearable device 100 starts to measure blood pressure, the wearable device 100 can control the wearable component 202 to contract and then relax to measure the user's blood pressure.

[0077] In some embodiments, the process of measuring blood pressure by the wearable device 100 may include: first, the wearable device 100 inflates the wearable component 202 to temporarily block the arm artery, and then, in the process of slowly deflation, records the air pressure value of the wearable component 202 and the pulse signal generated by the pulse; finally, the user's blood pressure is determined based on the air pressure value of the wearable component 202 and the amplitude or envelope of the pulse signal. Among them, blood flow will generate lateral pressure on the blood vessel wall, and the change in the magnitude of the lateral pressure will cause the blood vessel wall to vibrate slightly, and the pulse signal is a signal generated by the slight vibration of the blood vessel wall. Among them, determining the user's blood pressure based on the air pressure value of the wearable component 202 and the amplitude or envelope of the pulse signal is also called an oscillometric method.

[0078] In other embodiments, the process of measuring blood pressure by the wearable device 100 may include: the wearable device 100 may gradually inflate the wearable component 202 so that the arm artery is blocked by the component until it is completely blocked, record the air pressure value of the wearable component 202 and the pulse signal generated by the pulse, and then determine the user's blood pressure based on the air pressure value of the wearable component 202 and the amplitude or envelope of the pulse signal, and finally deflate. Among them, blood flow will generate lateral pressure on the blood vessel wall, and changes in the magnitude of the lateral pressure will cause the blood vessel wall to vibrate slightly, and the pulse signal is a signal generated by the slight vibration of the blood vessel wall. Among them, determining the user's blood pressure based on the air pressure value of the wearable component 202 and the amplitude or envelope of the pulse signal is also called the oscillometric method.

[0079] Figure 3 A schematic diagram of the hardware structure of the wearable device 100 is shown.

[0080] like Figure 3 As shown, the wearable device can be a wearable device such as a bracelet, a watch, etc., and the wearable device 100 can also be a non-wearable device such as a wall-type blood pressure monitor, etc. The embodiment of the present application does not impose any special restrictions on the specific type of the wearable device. The embodiment of the present application is only described by taking the wearable device 100 as a watch as an example.

[0081] The wearable device 100 may include: a processor 200, a wireless communication module 201, a mobile communication module 202, a sensor module 203, a button 204, a display screen 205, a motor 206, an internal memory 207, a SIM card interface 208, a USB interface 209, a power management module 210, a battery 211, a charging management module 212 and a blood pressure measurement device 213. Among them, the sensor module 203 may include a touch sensor 203A, a magnetic sensor 203B, a photoplethysmography (PPG) sensor 203C and a motion sensor 203D. Among them, the airbag 213G has a similar function to the wearable component 202.

[0082] It is understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the wearable device. In other embodiments of the present application, the wearable device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0083] The processor 200 may include one or more processing units, for example, the processor 200 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0084] In some embodiments, the processor 200 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (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.

[0085] In some embodiments, the processor 200 may also be a microprocessor unit (MCU).

[0086] The I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor 200 may include multiple groups of I2C buses. The processor 200 may be coupled to the touch sensor 203A, the power management module 210, etc. through different I2C bus interfaces. For example, the processor 200 may be coupled to the touch sensor 203A through the I2C interface, so that the processor 200 communicates with the touch sensor 203A through the I2C bus interface, thereby realizing the touch function of the wearable device.

[0087] The I2S interface can be used for audio communication. The PCM interface can also be used for audio communication to sample, quantize and encode analog signals. The UART interface is a universal serial data bus for asynchronous communication. The bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, the UART interface is generally used to connect the processor 200 with the wireless communication module 201. For example, the processor 200 communicates with the Bluetooth module in the wireless communication module 201 through the UART interface to implement the Bluetooth function.

[0088] The MIPI interface can be used to connect the processor 200 to peripheral devices such as the display screen 205. The MIPI interface includes a camera serial interface (CSI), a display serial interface (DSI), etc. The processor 200 and the display screen 205 communicate through the DSI interface to realize the display function of the wearable device.

[0089] The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. The USB interface 209 is an interface that complies with the USB standard specification, and can specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 209 can be used to connect a charger to charge the wearable device, and can also be used to transmit data between the wearable device and peripheral devices.

[0090] It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present invention is only a schematic illustration and does not constitute a structural limitation on the wearable device. In other embodiments of the present application, the wearable device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0091] The charging management module 212 is used to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 212 can receive charging input from the wired charger through the USB interface 209. In some wireless charging embodiments, the charging management module 212 can receive wireless charging input through the wireless charging coil of the wearable device. While the charging management module 212 is charging the battery 211, it can also power the wearable device through the power management module 210.

[0092] The power management module 210 is used to connect the battery 211, the charging management module 212 and the processor 200. The power management module 210 receives input from the battery 211 and / or the charging management module 212, and supplies power to the processor 200, the internal memory 207, the display screen 205, and the wireless communication module 201. The power management module 210 can also be used to monitor parameters such as battery capacity, battery cycle number, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 210 can also be set in the processor 200. In other embodiments, the power management module 210 and the charging management module 212 can also be set in the same device.

[0093] The wireless communication function of the wearable device can be implemented through the mobile communication module 202, the wireless communication module 201, the modem processor and the baseband processor.

[0094] The mobile communication module 202 can provide solutions for wireless communications including 2G / 3G / 4G / 5G applied to wearable devices. The mobile communication module 202 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 202 can receive electromagnetic waves from an antenna, and filter, amplify, and process the received electromagnetic waves, and transmit them to a modulation and demodulation processor for demodulation. In some embodiments, at least some of the functional modules of the mobile communication module 202 may be arranged in the processor 200. In some embodiments, at least some of the functional modules of the mobile communication module 202 may be arranged in the same device as at least some of the modules of the processor 200.

[0095] The wireless communication module 201 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc., which are applied to wearable devices. The wireless communication module 201 can be one or more devices integrating at least one communication processing module. The wireless communication module 201 receives electromagnetic waves via an antenna, modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 200. The wireless communication module 201 can also receive the signal to be sent from the processor 200, modulate the frequency, amplify it, and convert it into electromagnetic waves for radiation through the antenna.

[0096] The button 204 includes a power button, a volume button, etc. The button 204 can be a mechanical button or a touch button. The wearable device can receive the button input and generate a key signal input related to the user setting and function control of the wearable device.

[0097] The display screen 205 is used to display images, videos, etc. The display screen 205 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc. In some embodiments, the wearable device may include 1 or N display screens 205, where N is a positive integer greater than 1.

[0098] Motor 206 can generate vibration prompts. Motor 206 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. For example, touch operations acting on different applications (such as taking pictures, audio playback, etc.) can correspond to different vibration feedback effects. Motor 206 can also correspond to different vibration feedback effects for touch operations acting on different areas of display screen 205.

[0099] The internal memory 207 may include one or more random access memories (RAM) and one or more non-volatile memories (NVM).

[0100] Random access memory may include static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM, for example, the fifth generation DDR SDRAM is generally referred to as DDR5 SDRAM), etc.;

[0101] The non-volatile memory may include a disk storage device and a flash memory. Flash memory may include NOR FLASH, NAND FLASH, 3D NAND FLASH, etc. according to the operating principle, single-level cell (SLC), multi-level cell (MLC), triple-level cell (TLC), quad-level cell (QLC), etc. according to the potential level of the storage unit, and universal flash storage (UFS), embedded multi-media card (eMMC), etc. according to the storage specification. The random access memory can be directly read and written by the processor 200, and can be used to store executable programs (such as machine instructions) of the operating system or other running programs, and can also be used to store user and application data, etc. The non-volatile memory can also store executable programs and store user and application data, etc., and can be loaded into the random access memory in advance for direct reading and writing by the processor 200.

[0102] The SIM card interface 208 is used to connect a SIM card. The SIM card can be connected to and separated from the wearable device by inserting it into the SIM card interface 208 or pulling it out from the SIM card interface 208. The wearable device can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 208 can support Nano SIM cards, Micro SIM cards, SIM cards, and the like. Multiple cards can be inserted into the same SIM card interface 208 at the same time. The types of the multiple cards can be the same or different. The SIM card interface 208 can also be compatible with different types of SIM cards. The SIM card interface 208 can also be compatible with external memory cards. The wearable device interacts with the network through the SIM card to implement functions such as calls and data communications. In some embodiments, the wearable device uses an eSIM, i.e., an embedded SIM card. The eSIM card can be embedded in the wearable device and cannot be separated from the wearable device.

[0103] In some embodiments, the wearable device 100 may not include the SIM card interface 208 .

[0104] The touch sensor 203A is also called a "touch control device". The touch sensor 203A can be set on the display screen 205. The touch sensor 203A and the display screen 205 form a touch screen, also called a "touch control screen". The touch sensor 203A is used to detect touch operations acting on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen 205. In other embodiments, the touch sensor 203A can also be set on the surface of the wearable device, which is different from the position of the display screen 205.

[0105] The magnetic sensor 203B includes a Hall sensor.

[0106] The PPG sensor 203C user obtains the user's health data based on the PPG signal collected by the PPG sensor 203C. The user's health data includes but is not limited to: heart rate, blood oxygen, respiratory rate, blood oxygen saturation (SaO2), etc.

[0107] The motion sensor 203D includes but is not limited to an acceleration sensor and an angular velocity sensor. The motion sensor 203D can be used to collect motion data, and determine the user's motion state based on the motion data, and then determine whether the user is in a sleeping state based on the user's motion state.

[0108] It is worth noting that the sensor module 203 may also include an infrared sensor and the like.

[0109] The blood pressure measuring device 213 can be used to measure blood pressure. For an introduction to the blood pressure measuring device 213, please refer to Figure 4Description in the examples.

[0110] It should be noted that the wearable device 100 may include: Figure 3 More or less hardware structure, Figure 3 The embodiment is only an example and the present application does not limit it.

[0111] refer to Figure 4 , Figure 4 A schematic diagram of the structure of a blood pressure measurement device 213 provided in the present application is shown.

[0112] like Figure 4 As shown, the blood pressure measuring device 213 may include but is not limited to a microcontroller unit (MCU) 213A, a driving circuit 213B, a micro pump 213C, an air valve 213D, an air pressure sensor 213E, an air path conducting component 213F and an air bag 213G.

[0113] The driving circuit 213B is connected to the microcontroller unit 213A, and the air pressure sensor 213E is also connected to the microcontroller unit 213A. The microcontroller unit 213A is used to control the driving circuit 213B to adjust the voltage of the driving circuit 213B based on the airbag pressure obtained by the air pressure sensor 213E, so that the driving circuit 213B can control the micropump 213C to inflate the airbag 213G and control the air valve 213D to discharge the gas in the airbag 213G.

[0114] The air pressure sensor 213E is used to measure air pressure. In some embodiments of the present application, the wearable device measures the air pressure in the airbag 213G through the air pressure sensor 213E. In some embodiments of the present application, a part of the air pressure sensor 213E is located inside the airbag 213G to sense the air pressure of the airbag 213G.

[0115] In some embodiments of the present application, the air pressure sensor 213E and the airbag 213G may be connected via an air path conducting component 213F.

[0116] The micro pump 213C and the air valve 213D are connected to the driving circuit 213B. The driving circuit 213B can control the micro pump 213C to inflate the air bag 213G, and the driving circuit 213B can also control the air valve 213D to discharge the air in the air bag 213G.

[0117] The micro pump 213C is used for inflation and deflation.

[0118] In some embodiments of the present application, the wearable device 100 inflates the airbag 213G through the micro pump 213C, wherein the micro pump 213C and the airbag 213G may be connected through the air path conducting component 213F. The airbag 213G is used to squeeze the user's blood vessels, similar to the function of a cuff in a traditional blood pressure measurement device.

[0119] In some embodiments of the present application, the wearable device 100 can discharge the gas in the airbag 213G through the air valve 213D, wherein the air valve 213D and the airbag 213G can be connected through the air path conducting component 213F. In other embodiments, the wearable device 100 may not include the air valve 213D, and the present application does not limit this.

[0120] It is worth noting that the gas path conducting component 213F can be a separate component, or the gas path conducting component 213F can also be an air path formed by the combination of other hardware modules, or the gas path conducting component 213F can also be a part of other components, for example, it can be a part of the micro pump 213C, or it can be a part of the air bag 213G.

[0121] like Figure 5 As shown, when the wearable device 100 is a watch, the airbag 213G is attached to the side of the wearable component 202 close to the body. The micro pump 213C is connected to the airbag 213G through the air path conducting component 213F. The airbag 213G can be attached to only one side of the wearable component 202, and the wearable component 202 on this side can be located above the artery position of the user's wrist, such as above the radial artery position.

[0122] The airbag 213G can be located inside the body of the smart watch, the airbag 213G can be connected to the strap buckle, and the airbag 213G is connected to the dial through the vent cover. Correspondingly, the airbag 213G can be separated from the strap or the dial.

[0123] In some embodiments of the present application, a magnetic sensor 203B is provided on the wearable device 100. The magnetic sensor 203B can be used to determine whether the airbag 213G on the wearable device 100 is disassembled. For example, a magnet can be configured on the airbag 213G or on a watch strap connected to the airbag 213G, and the wearable device can determine the magnetic flux generated by the magnet on the airbag 213G or on the airbag 213G through the magnetic sensor, and then determine whether the airbag 213G on the wearable device is disassembled.

[0124] It should be noted that the blood pressure measuring device 213 may include: Figure 4 More or less hardware structure, Figure 4 The embodiment is only an example and the present application does not limit it.

[0125] In some embodiments of the present application, the wearable device 100 can set N constant pressure control points. When the blood pressure measurement starts, the wearable device 100 can inflate the airbag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure increase rate of the air pressure in the airbag 213G can be obtained as (v1-v2), so that the air pressure in the airbag 213G rises at a uniform rate according to the pressure increase rate (v1-v2). When reaching the first constant pressure control point P1, the wearable device 100 can control the air pressure in the airbag 213G to be P1 and remain unchanged, maintaining the first duration. After exceeding the first duration, the wearable device 100 can continue to inflate the airbag 213G at the inflation rate v1, so that the air pressure in the airbag 213G rises at a uniform rate according to the pressure increase rate (v1-v2). When the second constant pressure control point P2 is reached, the wearable device 100 can control the air pressure in the airbag 213G to be P2 and remain unchanged for a second time period, wherein P2 is greater than P1, and the second time period can be equal to the first time period, or the second time period can be different from the first time period. In this way, the wearable device 100 can obtain N linear boost sections and N constant pressure control sections, and obtain peripheral arterial pulse wave signals of the N linear boost sections and peripheral arterial pulse wave signals of the N constant pressure control sections.

[0126] The wearable device 100 can obtain the peripheral blood pressure measurement value based on the peripheral arterial pulse wave signal of the N linear boost segments and the air bag pressure waveform diagram of the N linear boost segments.

[0127] The wearable device 100 can also obtain a central artery pulse wave signal based on the peripheral artery pulse wave signals of the N constant pressure control segments. The wearable device 100 can perform feature analysis on the central artery pulse wave signal to obtain cardiovascular disease risks. Cardiovascular disease risks include but are not limited to peripheral resistance risks, arteriosclerosis risks, etc.

[0128] In some embodiments, the wearable device can also obtain a central arterial blood pressure value based on the peripheral blood pressure measurement value and the central arterial pulse wave signal, and the central arterial blood pressure value can better reflect the user's actual blood pressure value.

[0129] 1. The wearable device 100 obtains N linear boost segments and N constant voltage control segments.

[0130] The present application provides two methods for obtaining N linear boost sections and N constant pressure control sections. One method is that the wearable device 100 can adjust the inflation rate of the micro pump 213C to obtain N linear boost sections and N constant pressure control sections. Another method is that the wearable device 100 can fix the inflation rate of the micro pump 213C and adjust the deflation rate of the air valve 213D to obtain N linear boost sections and N constant pressure control sections.

[0131] Next, the above two methods for obtaining N linear boost sections and N constant voltage control sections are respectively and in detail introduced.

[0132] Method 1: The wearable device 100 adjusts the inflation rate of the micro pump 213C to obtain N linear pressure boosting sections and N constant pressure control sections.

[0133] In method 1, the wearable device 100 inflates and deflates the airbag 213G through the micropump 213C. The wearable device 100 can control the micropump 213C to inflate the airbag 213G, and the wearable device 100 can also control the micropump 213C to discharge the gas in the airbag 213G, wherein the deflation rate of the micropump 213C is fixed, for example, the deflation rate of the micropump 213C is v2.

[0134] The wearable device 100 may be preset with N constant pressure control points, for example, 4 constant pressure control points, each of which is 30 mmHg, 60 mmHg, 90 mmHg and 120 mmHg. Then the wearable device 100 may obtain 5 linear boost sections and 4 constant pressure control sections respectively.

[0135] Figure 6 A schematic diagram showing five linear boost sections and four constant voltage control sections acquired by the wearable device 100 is shown.

[0136] like Figure 6 As shown, the five linear boost sections may include but are not limited to: linear boost section A, linear boost section B, linear boost section C, linear boost section D, and linear boost section E. The four constant voltage control sections may include but are not limited to: constant voltage control section A, constant voltage control section B, constant voltage control section C, and constant voltage control section D.

[0137] The wearable device 100 may obtain the linear boost segment A, including: when the blood pressure measurement starts, for example, at time 0, the air pressure in the airbag 213G is close to 0 mmHg. Before the air pressure in the airbag 213G reaches the first constant pressure control point of 30 mmHg, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micropump 213C to inflate the airbag 213G at an inflation rate v1. Since the micropump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2). For example, as Figure 6 As shown, between 0s-10s, the air pressure in the airbag 213G increases uniformly to 30 mmHg, and the average pressure increase rate of the air bag 213G is 3 mmHg / s.

[0138] It should be noted that during the linear pressure increase segment A, the air pressure sensor 213E also acquires the user's peripheral arterial pulse wave signal in real time.

[0139] It should be noted that the pressure increase rate of the air bag 213G in the linear pressure increase section can vary within a certain range. For example, the pressure increase rate of the air pressure in the linear pressure increase section A can fluctuate between 2.8 mmHg / s and 3.2 mmHg / s and may not be fixed.

[0140] The wearable device 100 may obtain the constant pressure control section A, which may include: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 30 mmHg, that is, the air pressure in the airbag 213G reaches the first constant pressure control point 30 mmHg. In order to keep the air pressure in the airbag 213G at 30 mmHg, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the second duty cycle. In response to the duty cycle of the drive circuit 213B being the second duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v2, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, so that the air pressure in the airbag 213G remains unchanged and is fixed at 30 mmHg.

[0141] Between 11s and 22s, the air pressure in the airbag 213G is maintained at 30 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0142] Optionally, the holding time in the linear boost section A may be set to 12 seconds.

[0143] It should be noted that the air pressure in the airbag in the constant pressure control section can remain unchanged or fluctuate within a certain range. For example, when the air pressure at the constant pressure control point is 30 mmHg, the air pressure in the airbag in the constant pressure control section can fluctuate within the range of 25 mmHg-35 mmHg.

[0144] The wearable device 100 may obtain the linear boost section B including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 30 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micropump 213C to inflate the airbag 213G at the inflation rate v1. Since the micropump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0145] For example, Figure 6As shown, between 23s and 32s, the air pressure in the airbag 213G is uniformly increased to 60 mmHg, and the average pressure increase rate in the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section B is the same as the average pressure increase rate in the linear pressure increase section A.

[0146] It should be noted that during the linear pressure increase segment B, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time.

[0147] The wearable device 100 may obtain the constant pressure control section B including: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 60 mmHg, that is, the air pressure in the airbag 213G reaches the second constant pressure control point 60 mmHg. In order to keep the air pressure in the airbag 213G at 60 mmHg, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the second duty cycle. In response to the duty cycle of the drive circuit 213B being the second duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v2, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, so that the air pressure in the airbag 213G remains unchanged and is fixed at 60 mmHg.

[0148] For example, Figure 6 As shown, between 33s-44s, the air pressure in the airbag 213G is maintained at 60 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0149] Optionally, the holding time in the constant pressure control section B may be set to 12 seconds.

[0150] It should be noted that the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time during the constant pressure control segment B. Since the air pressure in the airbag 213G in the constant pressure control segment B is fixed, the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss than the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E in the linear boost segment B, and the effect is better.

[0151] The wearable device 100 may obtain the linear boost section C including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 90 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micropump 213C to inflate the airbag 213G at the inflation rate v1. Since the micropump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0152] For example, Figure 6 As shown, between 45s and 54s, the air pressure in the airbag 213G is uniformly increased to 90 mmHg, and the average pressure increase rate in the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section C is the same as the average pressure increase rate in the linear pressure increase section B.

[0153] It should be noted that during the linear pressure increase section C, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time.

[0154] The wearable device 100 may obtain the constant pressure control section C including: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 90 mmHg, that is, the air pressure in the airbag 213G reaches the third constant pressure control point 90 mmHg. In order to keep the air pressure in the airbag 213G at 90 mmHg, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the second duty cycle. In response to the duty cycle of the drive circuit 213B being the second duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v2, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, so that the air pressure in the airbag 213G remains unchanged and is fixed at 90 mmHg.

[0155] For example, Figure 6 As shown, between 55s-66s, the air pressure in the airbag 213G is maintained at 90 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0156] Optionally, the holding time in the constant pressure control section C may be set to 12 seconds.

[0157] It should be noted that during the constant pressure control section C, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time. Since the air pressure in the airbag 213G in the constant pressure control section C is fixed, the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss than the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E in the linear boost section C, and the effect is better.

[0158] The wearable device 100 may obtain the linear boost section D including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 90 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micropump 213C to inflate the airbag 213G at the inflation rate v1. Since the micropump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0159] For example, Figure 6 As shown, between 67s and 76s, the air pressure in the airbag 213G is uniformly increased to 120 mmHg, and the average pressure increase rate in the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section D is the same as the average pressure increase rate in the linear pressure increase section C.

[0160] It should be noted that during the linear pressure increase section D, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time.

[0161] The wearable device 100 may obtain the constant pressure control section D including: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 120 mmHg, that is, the air pressure in the airbag 213G reaches the fourth constant pressure control point 120 mmHg. In order to keep the air pressure in the airbag 213G at 120 mmHg, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the second duty cycle. In response to the duty cycle of the drive circuit 213B being the second duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v2, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, so that the air pressure in the airbag 213G remains unchanged and is fixed at 120 mmHg.

[0162] For example, Figure 6 As shown, between 77s-88s, the air pressure in the airbag 213G is maintained at 120 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0163] Optionally, the holding time in the constant pressure control section D may be set to 12 seconds.

[0164] It should be noted that during the constant pressure control section D, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time. Since the air pressure in the airbag 213G in the constant pressure control section D is fixed, the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss than the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E in the linear boost section D, and the effect is better.

[0165] The wearable device 100 may obtain the linear boost section E including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 120 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micropump 213C to inflate the airbag 213G at the inflation rate v1. Since the micropump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0166] For example, Figure 6 As shown, at 89 seconds and thereafter, the air pressure in the airbag 213G increases uniformly to a maximum value, and the average pressure increase rate of the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section E is the same as the average pressure increase rate in the linear pressure increase section D.

[0167] It should be noted that during the linear pressure increase segment E, the air pressure sensor 213E also acquires the user's peripheral arterial pulse wave signal in real time.

[0168] The above steps are repeated until the micro pump 213C stops inflating the air bag 213G, and the blood pressure measurement is finished.

[0169] Figure 7 A schematic diagram of the duty cycle corresponding to the driving circuit 213B in the linear boost section and the constant voltage control section is shown. The duty cycle of the driving circuit 213B in the linear boost section A, the linear boost section B, the linear boost section C, the linear boost section D and the linear boost section E is the first duty cycle. The duty cycle of the driving circuit 213B in the constant voltage control section A, the constant voltage control section B, the constant voltage control section C and the constant voltage control section D is the second duty cycle. The first duty cycle is greater than the second duty cycle. That is to say, in method one, the duty cycle of the driving circuit 213B in the linear boost section is the same, the duty cycle of the driving circuit 213B in the constant voltage control section is the same, but the duty cycle of the driving circuit 213B in the linear boost section is greater than the duty cycle of the driving circuit 213B in the constant voltage control section.

[0170] Figure 8A schematic diagram of the average pressure increase rate in the airbag 213G in the linear pressure increase section and the constant pressure control section is shown. The average pressure increase rate in the airbag 213G in the linear pressure increase section A, the linear pressure increase section B, the linear pressure increase section C, the linear pressure increase section D, and the linear pressure increase section E is 3 mmHg / s. The average pressure increase rate in the airbag 213G in the constant pressure control section A, the constant pressure control section B, the constant pressure control section C, and the constant pressure control section D is 0. That is to say, in method one, the average pressure increase rate in the airbag 213G in the linear pressure increase section is the same, the average pressure increase rate in the airbag 213G in the constant pressure control section is close to 0, and the pressure in the airbag 213G in the constant pressure control section is fixed and unchanged.

[0171] It should be noted that the wearable device 100 is not limited to setting 5 linear boost sections and 4 constant voltage control sections. More or fewer linear boost sections and constant voltage control sections may also be set, which will not be elaborated in this application.

[0172] Fig. 9 A schematic flow chart of a method for a wearable device 100 to obtain N linear boost sections and N constant voltage control sections is shown.

[0173] like Fig. 9 As shown, the wearable device 100 includes a driving circuit 213B, a micro pump 213C, an air bag 213G and an air pressure sensor 213E.

[0174] In some embodiments, the wearable device 100 may further include an air valve 213D. During the blood pressure measurement process, the air valve 213D remains closed.

[0175] S901. The driving circuit 213B saves N constant voltage control points.

[0176] The driving circuit 213B stores N constant pressure control points, where N is a positive integer greater than or equal to . When the air pressure in the airbag 213G reaches the constant pressure control point, the driving circuit 213B can adjust the inflation rate of the micro pump 213C so that the air pressure in the airbag 213G remains unchanged, so that the air pressure sensor 213E can obtain the peripheral artery pulse wave signal of the constant pressure control section.

[0177] Exemplarily, the N constant pressure control points may be 30 mmHg, 60 mmHg, 90 mmHg, and 120 mmHg, respectively.

[0178] S902. The air pressure sensor 213E monitors and obtains the air pressure in the airbag 213G in real time.

[0179] S903: The air pressure sensor 213E sends the acquired air pressure in the airbag 213G to the drive circuit 213B.

[0180] The air pressure sensor 213E may be connected to the airbag 213G. For example, the air pressure sensor 213E and the airbag 213G may be connected via an air path conducting component 213F.

[0181] The air pressure sensor 213E can monitor the air pressure in the airbag 213G in real time and send the acquired air pressure in the airbag 213G to the driving circuit 213B.

[0182] S904 , the driving circuit 213B sets the driving circuit to a first duty cycle.

[0183] S905 , in response to being set to the first duty cycle, the driving circuit 213B sends a charging rate v1 to the micro pump 213C.

[0184] S906 , the micro pump 213C inflates the airbag 213G at an inflation rate v1.

[0185] The driving circuit 213B receives the instruction and starts to measure the blood pressure. When the blood pressure is just measured, the driving circuit 213B sets the driving circuit to the first duty cycle. In response to being set to the first duty cycle, the driving circuit 213B sends an inflation rate v1 to the micro pump 213C, so that the micro pump 213C inflates the air bag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the air bag 213G is v2, then the pressure increase rate of the air pressure in the air bag 213G can be obtained as (v1-v2), so that the air pressure in the air bag 213G rises at a uniform speed according to the pressure increase rate (v1-v2).

[0186] S907, the driving circuit 213B also needs to monitor whether the air pressure in the airbag 213G reaches the preset constant pressure control point.

[0187] The preset constant pressure control point may be any one of the N constant pressure control points, for example, the preset constant pressure control point may be 30 mmHg, 60 mmHg, 90 mmHg or 120 mmHg.

[0188] The air pressure sensor 213E may periodically / irregularly send the air pressure in the airbag 213G to the driving circuit 213B, and the driving circuit 213B needs to monitor whether the air pressure in the airbag 213G reaches a preset constant pressure control point.

[0189] When the air pressure in the airbag 213G reaches the preset constant pressure control point, the driving circuit 213B can adjust the inflation rate of the micropump 213C so that the air pressure in the airbag 213G remains constant to obtain the peripheral arterial pulse wave signal in the constant pressure control section.

[0190] When the air pressure in the airbag 213G does not reach the preset constant pressure control point, the driving circuit 213B may not adjust the inflation rate of the micro pump 213C, so that the air pressure in the airbag 213G rises uniformly at the pressure increase rate (v1-v2).

[0191] When the air pressure in the airbag 213G reaches the preset constant pressure control point, S908 is executed.

[0192] If the air pressure in the airbag 213G does not reach the preset constant pressure control point, S904 is executed. Alternatively, if the air pressure in the airbag 213G does not reach the preset constant pressure control point, S904 is not executed, and the micro pump 213C continues to inflate the airbag 213G at the inflation rate v1.

[0193] S908 , the driving circuit 213B sets the driving circuit to a second duty cycle.

[0194] S909 , in response to being set to the second duty cycle, the driving circuit 213B sends the inflation rate v2 to the micro pump 213C.

[0195] S910, the micro pump 213C inflates the airbag 213G at an inflation rate v2.

[0196] When the air pressure in the airbag 213G reaches the preset constant pressure control point, the driving circuit 213B sets the driving circuit to a second duty cycle. The second duty cycle is smaller than the first duty cycle. The smaller the duty cycle, the smaller the inflation rate.

[0197] In response to the second duty cycle being set, the driving circuit 213B sends the inflation rate v2 to the micro pump 213C, so that the micro pump 213C inflates the airbag 213G at the inflation rate v2. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, it can be obtained that the pressure increase rate of the airbag 213G is 0, and the air pressure in the airbag 213G remains unchanged.

[0198] In this way, when the air pressure in the airbag 213G reaches the preset constant pressure control point, the micropump 213C reduces the inflation rate so that the inflation rate of the airbag 213G is equal to the deflation rate of the airbag 213G, and the air pressure sensor 213E can obtain the peripheral arterial pulse wave signal of the constant pressure control section.

[0199] S911. The driving circuit 213B needs to determine whether the holding time of the preset constant voltage control point reaches a first time.

[0200] After the air pressure in the airbag 213G reaches the preset constant pressure control point and the micro pump 213C reduces the inflation rate, the micro pump 213C needs to determine whether the holding time of the preset constant pressure control point reaches a first time period.

[0201] When the holding time of the preset constant pressure control point reaches the first time, S904 is executed, that is, the driving circuit 213B sets the driving circuit to the first duty cycle again, and the driving circuit 213B sends the inflation rate v1 to the micro pump 213C, so that the micro pump 213C inflates the airbag 213G at the inflation rate v1. Since the micro pump 213C also has a slight air leakage, for example, the airbag 213G has an air leakage rate of v2, then the pressure increase rate of the airbag 213G can be obtained as (v1-v2), so that the air pressure in the airbag 213G rises at a uniform speed according to the pressure increase rate (v1-v2).

[0202] If the holding time of the preset constant pressure control point does not reach the first time, S908 is executed, or if the air pressure in the airbag 213G does not reach the preset constant pressure control point, S908 is not executed, that is, the micro pump 213C continues to inflate the airbag 213G at the inflation rate v2, so that the air pressure in the airbag 213G continues to remain constant.

[0203] In some embodiments, after the blood pressure measurement is completed and the micro pump 213C stops inflating the airbag 213G, the wearable device 100 can open the air valve 213D to accelerate the deflation rate of the airbag 213G.

[0204] Method 2: The wearable device 100 keeps the inflation rate of the micro pump 213C unchanged and adjusts the deflation rate of the air valve 213D to obtain N linear pressure increasing sections and N constant pressure control sections.

[0205] In method 2, the wearable device 100 inflates and deflates the airbag 213G through the micropump 213C. The wearable device 100 can control the micropump 213C to inflate the airbag 213G, and the wearable device 100 can also control the micropump 213C and the air valve 213D to discharge the gas in the airbag 213G, wherein the deflation rate of the micropump 213C is fixed, for example, the deflation rate of the micropump 213C is v2. The deflation rate of the air valve 213D is adjustable.

[0206] The wearable device 100 may be preset with N constant pressure control points, for example, 4 constant pressure control points, each of which is 30 mmHg, 60 mmHg, 90 mmHg and 120 mmHg. Then the wearable device 100 may obtain 5 linear boost sections and 4 constant pressure control sections respectively.

[0207] refer to Figure 6 , the wearable device 100 can obtain 5 linear boost sections and 4 constant voltage control sections.

[0208] like Figure 6As shown, the five linear boost sections may include but are not limited to: linear boost section A, linear boost section B, linear boost section C, linear boost section D, and linear boost section E. The four constant voltage control sections may include but are not limited to: constant voltage control section A, constant voltage control section B, constant voltage control section C, and constant voltage control section D.

[0209] The wearable device 100 may obtain the linear boost segment A, including: when the blood pressure measurement starts, for example, at time 0, the air pressure in the airbag 213G is close to 0 mmHg. Before the air pressure in the airbag 213G reaches the first constant pressure control point of 30 mmHg, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle, and the air valve 213D is closed. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micropump 213C to inflate the airbag 213G at an inflation rate v1. Since the micropump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2). For example, as Figure 6 As shown, between 0s-10s, the air pressure in the airbag 213G increases uniformly to 30 mmHg, and the average pressure increase rate of the air bag 213G is 3 mmHg / s.

[0210] It should be noted that during the linear pressure increase segment A, the air pressure sensor 213E also acquires the user's peripheral arterial pulse wave signal in real time.

[0211] The wearable device 100 may obtain the constant pressure control section A, which may include: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 30 mmHg, that is, the air pressure in the airbag 213G reaches the first constant pressure control point 30 mmHg. The duty cycle of the drive circuit 213B is still maintained at the first duty cycle. In order to keep the air pressure in the airbag 213G at 30 mmHg, the drive circuit 213B can control the deflation rate of the air valve 213D to be (v1-v2). At this time, the inflation rate of the airbag 213G is v1, and the deflation rate of the airbag 213G is (v1-v2)+v2=v1, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, and the air pressure in the airbag 213G remains unchanged and fixed at 30 mmHg.

[0212] Between 11s and 22s, the air pressure in the airbag 213G is maintained at 30 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0213] Optionally, the holding time in the linear boost section A may be set to 12 seconds.

[0214] It should be noted that during the linear pressure increase segment B, the air pressure sensor 213E also acquires the user's peripheral arterial pulse wave signal in real time.

[0215] The wearable device 100 may obtain the linear boost section B including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 30 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle, and the air valve 213D is closed. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0216] For example, Figure 6 As shown, between 23s and 32s, the air pressure in the airbag 213G is uniformly increased to 60 mmHg, and the average pressure increase rate in the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section B is the same as the average pressure increase rate in the linear pressure increase section A.

[0217] It should be noted that during the linear pressure increase segment B, the air pressure sensor 213E also acquires the user's peripheral arterial pulse wave signal in real time.

[0218] The wearable device 100 may obtain the constant pressure control section B including: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 60 mmHg, that is, the air pressure in the airbag 213G reaches the second constant pressure control point 60 mmHg. The duty cycle of the drive circuit 213B is still maintained at the first duty cycle. In order to keep the air pressure in the airbag 213G at 60 mmHg, the drive circuit 213B can control the deflation rate of the air valve 213D to be (v1-v2). At this time, the inflation rate of the airbag 213G is v1, and the deflation rate of the airbag 213G is (v1-v2)+v2=v1, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, and the air pressure in the airbag 213G remains unchanged and fixed at 60 mmHg.

[0219] For example, Figure 6 As shown, between 33s-44s, the air pressure in the airbag 213G is maintained at 60 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0220] Optionally, the holding time in the constant pressure control section B may be set to 12 seconds.

[0221] It should be noted that the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time during the constant pressure control segment B. Since the air pressure in the airbag 213G in the constant pressure control segment B is fixed, the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss than the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E in the linear boost segment B, and the effect is better.

[0222] The wearable device 100 may obtain the linear boost section C by: after the air pressure sensor 213E detects that the air pressure in the airbag 213G is maintained at 90 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle, and the air valve 213D is closed. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0223] For example, Figure 6 As shown, between 45s and 54s, the air pressure in the airbag 213G is uniformly increased to 90 mmHg, and the average pressure increase rate in the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section C is the same as the average pressure increase rate in the linear pressure increase section B.

[0224] It should be noted that during the linear pressure increase section C, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time.

[0225] The wearable device 100 may obtain the constant pressure control section C, which may include: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 90 mmHg, that is, the air pressure in the airbag 213G reaches the third constant pressure control point 90 mmHg. The duty cycle of the drive circuit 213B is still maintained at the first duty cycle. In order to keep the air pressure in the airbag 213G at 90 mmHg, the drive circuit 213B can control the deflation rate of the air valve 213D to be (v1-v2). At this time, the inflation rate of the airbag 213G is v1, and the deflation rate of the airbag 213G is (v1-v2)+v2=v1, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, and the air pressure in the airbag 213G remains unchanged and fixed at 90 mmHg.

[0226] For example, Figure 6 As shown, between 55s-66s, the air pressure in the airbag 213G is maintained at 90 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0227] Optionally, the holding time in the constant pressure control section C may be set to 12 seconds.

[0228] It should be noted that during the constant pressure control section C, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time. Since the air pressure in the airbag 213G in the constant pressure control section C is fixed, the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss than the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E in the linear boost section C, and the effect is better.

[0229] The wearable device 100 may obtain the linear boost section D including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 90 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle, and the air valve 213D is closed. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0230] For example, Figure 6 As shown, between 67s and 76s, the air pressure in the airbag 213G is uniformly increased to 120 mmHg, and the average pressure increase rate in the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section D is the same as the average pressure increase rate in the linear pressure increase section C.

[0231] It should be noted that during the linear pressure increase section D, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time.

[0232] The wearable device 100 may obtain the constant pressure control section D, which may include: the air pressure sensor 213E monitors that the air pressure in the airbag 213G reaches 120 mmHg, that is, the air pressure in the airbag 213G reaches the fourth constant pressure control point 120 mmHg. The duty cycle of the drive circuit 213B is still maintained at the first duty cycle. In order to keep the air pressure in the airbag 213G at 120 mmHg, the drive circuit 213B can control the deflation rate of the air valve 213D to be (v1-v2). At this time, the inflation rate of the airbag 213G is v1, and the deflation rate of the airbag 213G is (v1-v2)+v2=v1, that is, the inflation rate of the airbag 213G is the same as the deflation rate of the airbag 213G, and the air pressure in the airbag 213G remains unchanged and fixed at 120 mmHg.

[0233] For example, Figure 6As shown, between 77s-88s, the air pressure in the airbag 213G is maintained at 120 mmHg, and the average pressure increase rate of the air pressure in the airbag 213G is 0.

[0234] Optionally, the holding time in the constant pressure control section D may be set to 12 seconds.

[0235] It should be noted that during the constant pressure control section D, the air pressure sensor 213E also obtains the user's peripheral arterial pulse wave signal in real time. Since the air pressure in the airbag 213G in the constant pressure control section D is fixed, the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss than the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E in the linear boost section D, and the effect is better.

[0236] The wearable device 100 may obtain the linear boost section E including: after the air pressure sensor 213E monitors that the air pressure in the airbag 213G is maintained at 120 mmHg for 12 seconds, the wearable device 100 may control the duty cycle of the drive circuit 213B to be the first duty cycle, and the air valve 213D is closed. In response to the duty cycle of the drive circuit 213B being the first duty cycle, the drive circuit 213B may control the micro pump 213C to inflate the airbag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the airbag 213G is v2, then the pressure rise rate of the airbag 213G can be obtained as (v1-v2).

[0237] For example, Figure 6 As shown, at 89 seconds and thereafter, the air pressure in the airbag 213G increases uniformly to a maximum value, and the average pressure increase rate of the airbag 213G is 3 mmHg / s. The average pressure increase rate in the linear pressure increase section E is the same as the average pressure increase rate in the linear pressure increase section D.

[0238] It should be noted that during the linear pressure increase segment E, the air pressure sensor 213E also acquires the user's peripheral arterial pulse wave signal in real time.

[0239] The above steps are repeated until the micro pump 213C stops inflating the air bag 213G, and the blood pressure measurement is finished.

[0240] The above steps are repeated until the micro pump 213C stops inflating the air bag 213G, and the blood pressure measurement is finished.

[0241] Fig.10 A schematic diagram of the duty ratio corresponding to the driving circuit 213B in the linear boost section and the constant voltage control section is shown. The duty ratio of the driving circuit 213B in the linear boost section A, the linear boost section B, the linear boost section C, the linear boost section D, the linear boost section E, and the constant voltage control section A, the constant voltage control section B, the constant voltage control section C, and the constant voltage control section D are all the first duty ratio.

[0242] Fig.11 The average pressure increase rate in the airbag 213G in the linear pressure increase section and the constant pressure control section is shown. The average pressure increase rate in the airbag 213G in the linear pressure increase section A, the linear pressure increase section B, the linear pressure increase section C, the linear pressure increase section D and the linear pressure increase section E is 3 mmHg / s. The average pressure increase rate in the airbag 213G in the constant pressure control section A, the constant pressure control section B, the constant pressure control section C and the constant pressure control section D is 0. That is to say, in method 2, the average pressure increase rate in the airbag 213G in the linear pressure increase section is the same, the average pressure increase rate in the airbag 213G in the constant pressure control section is close to 0, and the pressure in the airbag 213G in the constant pressure control section is fixed and unchanged.

[0243] It should be noted that the wearable device 100 is not limited to setting 5 linear boost sections and 4 constant voltage control sections. More or fewer linear boost sections and constant voltage control sections may also be set, which will not be elaborated in this application.

[0244] Fig.12 A schematic flow chart of another method for the wearable device 100 to obtain N linear boost sections and N constant voltage control sections is shown.

[0245] like Fig.12 As shown, the wearable device 100 includes a driving circuit 213B, a micro pump 213C, an air valve 213D, an air bag 213G and an air pressure sensor 213E.

[0246] In the linear pressure increasing section, the gas valve 213D is in a closed state, and in the constant pressure control section, the gas valve 213D is in an open state.

[0247] For the description of S1201-S1203, please refer to the description in S901-S903, and this application will not go into details here.

[0248] S1204 , the driving circuit 213B sets the driving circuit to a first duty cycle.

[0249] S1205 , in response to being set to the first duty cycle, the driving circuit 213B sends a charging rate v1 to the micro pump 213C.

[0250] S1206. The micro pump 213C inflates the airbag 213G at an inflation rate v1.

[0251] The driving circuit 213B receives the instruction and starts to measure the blood pressure. When the blood pressure is just measured, the driving circuit 213B sets the driving circuit to the first duty cycle. In response to being set to the first duty cycle, the driving circuit 213B sends an inflation rate v1 to the micro pump 213C, so that the micro pump 213C inflates the air bag 213G at the inflation rate v1. Since the micro pump 213C also has a slight deflation, for example, the deflation rate of the air bag 213G is v2, then the pressure increase rate of the air pressure in the air bag 213G can be obtained as (v1-v2), so that the air pressure in the air bag 213G rises at a uniform speed according to the pressure increase rate (v1-v2).

[0252] It should be noted that in method 2, during the blood pressure measurement, the micro pump 213C continuously inflates the air bag 213G at an inflation rate v1.

[0253] S1207, the drive circuit 213B sends a closing instruction to the gas valve 213D.

[0254] S1208. In response to the closing instruction, the air valve 213D stops discharging the air in the airbag 213G.

[0255] Optionally, S1207-S1208 may be executed before S1204-S1206, and S1207-S1208 may be executed simultaneously with S1204-S1206, which is not limited in the present application.

[0256] The driving circuit 213B receives the instruction and starts measuring the blood pressure. When the blood pressure measurement starts, the driving circuit 213B sends a closing instruction to the air valve 213D. In response to the closing instruction, the air valve 213D stops discharging the air in the air bag 213G.

[0257] That is to say, when the air pressure in the airbag 213G does not reach the preset constant pressure control point, the air valve 213D is in a closed state.

[0258] S1209, the driving circuit 213B needs to monitor whether the air pressure in the airbag 213G reaches the preset constant pressure control point.

[0259] The preset constant pressure control point may be any one of the N constant pressure control points, for example, the preset constant pressure control point may be 30 mmHg, 60 mmHg, 90 mmHg or 120 mmHg.

[0260] The air pressure sensor 213E may periodically / irregularly send the air pressure in the airbag 213G to the driving circuit 213B, and the driving circuit 213B needs to monitor whether the air pressure in the airbag 213G reaches a preset constant pressure control point.

[0261] When the air pressure in the airbag 213G reaches the preset constant pressure control point, the driving circuit 213B can adjust the deflation rate of the air valve 213D so that the air pressure in the airbag 213G remains constant to obtain the peripheral arterial pulse wave signal in the constant pressure control section.

[0262] When the air pressure in the airbag 213G does not reach the preset constant pressure control point, the driving circuit 213B may not open the air valve 213D, so that the air pressure in the airbag 213G rises uniformly at the pressure increase rate (v1-v2).

[0263] When the air pressure in the airbag 213G reaches the preset constant pressure control point, S1210 is executed.

[0264] If the air pressure in the airbag 213G does not reach the preset constant pressure control point, S1207 is executed. Alternatively, if the air pressure in the airbag 213G does not reach the preset constant pressure control point, S1207 is not executed, and the air valve 213D is still in the closed state.

[0265] S1210, the driving circuit 213B sends the deflation rate (v1-v2) to the gas valve 213D.

[0266] S1211. In response to the deflation rate (v1-v2), the air valve 213D discharges the air in the airbag 213G at the deflation rate (v1-v2).

[0267] When the air pressure in the airbag 213G reaches the preset constant pressure control point, the driving circuit 213B sends the deflation rate (v1-v2) to the air valve 213D. In response to the deflation rate (v1-v2), the air valve 213D discharges the air in the airbag 213G at the deflation rate (v1-v2).

[0268] Since the micro pump 213C also has a slight air leakage, for example, the air leakage rate of the air bag 213G is v2, then it can be obtained that the air leakage rate of the air bag 213G is v1, which is the same as the inflation rate of the air bag 213G, that is, the pressure increase rate of the air bag 213G is 0, and the air pressure in the air bag 213G remains unchanged.

[0269] In this way, when the air pressure in the airbag 213G reaches the preset constant pressure control point, the air valve 213D can open to discharge the air in the airbag 213G, so that the inflation rate of the airbag 213G is equal to the deflation rate of the airbag 213G, and the air pressure sensor 213E can obtain the peripheral arterial pulse wave signal of the constant pressure control section.

[0270] S1212: The driving circuit 213B needs to determine whether the holding time of the preset constant voltage control point reaches a first time.

[0271] After the air pressure in the airbag 213G reaches the preset constant pressure control point, the micro pump 213C needs to determine whether the holding time of the preset constant pressure control point reaches a first time length.

[0272] When the holding time of the preset constant pressure control point reaches the first time length, S1207 is executed, that is, the driving circuit 213B sends a closing instruction to the air valve 213D again, so that the air valve 213D is closed. In some embodiments, after the blood pressure measurement is completed and the micropump 213C stops inflating the air bag 213G, the wearable device 100 can open the air valve 213D to speed up the deflation rate of the air bag 213G.

[0273] If the holding time of the preset constant pressure control point does not reach the first time length, S1210 is executed. Alternatively, if the holding time of the preset constant pressure control point does not reach the first time length, S1210 is not executed, that is, the air valve 213D continues to be closed, so that the air pressure in the airbag 213G continues to remain constant.

[0274] In some embodiments, after the blood pressure measurement is completed and the micro pump 213C stops inflating the airbag 213G, the wearable device 100 can open the air valve 213D to accelerate the deflation rate of the airbag 213G.

[0275] 2. The wearable device 100 obtains the peripheral arterial blood pressure value based on the airbag pressure signal corresponding to the N linear boost segments and the peripheral arterial pulse wave signal corresponding to the N linear boost segments.

[0276] Based on the above description, it can be known that when the wearable device 100 inflates the airbag 213G through the micro pump 213C to measure the blood pressure, the air pressure sensor 213E also continuously collects the peripheral arterial pulse wave signal.

[0277] like Fig.13 As shown, in the linear pressure increase section A, the air pressure sensor 213E collects the peripheral arterial pulse wave A1. In the constant pressure control section A, the air pressure sensor 213E collects the peripheral arterial pulse wave A2.

[0278] In the linear pressure increasing section B, the air pressure sensor 213E collects the peripheral arterial pulse wave B1. In the constant pressure control section B, the air pressure sensor 213E collects the peripheral arterial pulse wave B2.

[0279] In the linear pressure increasing section C, the air pressure sensor 213E collects the peripheral arterial pulse wave C1. In the constant pressure control section C, the air pressure sensor 213E collects the peripheral arterial pulse wave C2.

[0280] In the linear pressure increasing section D, the air pressure sensor 213E collects the peripheral arterial pulse wave D1. In the constant pressure control section D, the air pressure sensor 213E collects the peripheral arterial pulse wave D2.

[0281] In the linear pressure increasing section E, the air pressure sensor 213E collects the peripheral arterial pulse wave E1.

[0282] The wearable device 100 can obtain the peripheral arterial pulse wave signals corresponding to the N linear boost segments, and obtain the peripheral arterial blood pressure value based on the peripheral arterial pulse wave signals corresponding to the N linear boost segments.

[0283] Specifically, Fig.14 As shown, the wearable device 100 can obtain peripheral arterial pulse wave signals corresponding to N linear boost segments, such as peripheral arterial pulse wave signal A1, peripheral arterial pulse wave signal B1, peripheral arterial pulse wave signal C1, peripheral arterial pulse wave signal D1 and peripheral arterial pulse wave signal E1. Afterwards, the wearable device 100 splices the peripheral arterial pulse wave signals corresponding to the N linear boost segments into a complete peripheral arterial pulse wave signal in chronological order. The wearable device 100 can obtain the peripheral arterial blood pressure value based on the peripheral arterial pulse wave signal of the linear boost segment and the blood pressure change signal of the linear boost segment.

[0284] Fig.15 A schematic diagram of how to obtain peripheral arterial blood pressure values ​​provided in an embodiment of the present application.

[0285] like Fig.15 As shown, in the process of the wearable device 100 inflating the wearable component 202 to temporarily block the arm artery, the state of the wearable component 202 is gradually increasing pressure to stability, and the artery state is gradually blocked to complete blockage. In the process of the wearable component 202 being gradually pressurized to stability, the air pressure value and pulse signal of the wearable component 202 are recorded. When the air pressure value of the wearable component 202 gradually increases and the diastolic pressure is less than the mean pressure, the pulse signal is a small oscillation wave. When the air pressure value of the wearable component 202 continues to gradually increase and is greater than the diastolic pressure and less than the mean pressure, the amplitude of the pulse signal gradually increases, and when the air pressure value of the wearable component 202 is equal to the mean pressure, the amplitude of the pulse signal reaches the maximum value. When the air pressure value of the wearable component 202 gradually increases and is greater than the mean pressure and less than the systolic pressure, the artery is gradually blocked, and the amplitude of the pulse signal continues to decrease; when the air pressure value of the wearable component 202 is greater than or equal to the systolic pressure, the artery is blocked, and the pulse signal is a small oscillation wave. Therefore, the wearable device 100 can determine the user's systolic and diastolic blood pressures through the amplitude change of the pulse signal and the air pressure value of the wearable component 202. In a possible implementation, the air pressure value of the wearable component 202 and the pulse signal can be determined by a built-in air pressure sensor in the wearable device 100.

[0286] 3. The wearable device 100 obtains a central artery pulse wave signal based on the peripheral artery pulse wave signals corresponding to the N constant pressure control segments.

[0287] based on Fig.14 As can be seen from the description of the embodiment, in the process of measuring blood pressure, the wearable device 100 can obtain peripheral arterial pulse wave signals corresponding to N linear boost segments. The air pressure in the airbag 213G in the constant pressure control segment remains constant, and the peripheral arterial pulse wave signal obtained by the air pressure sensor 213E has less frame loss and better quality. The wearable device 100 can obtain the central arterial pulse wave signal based on the peripheral arterial pulse wave signal obtained in the constant pressure control segment, so as to analyze whether the user has cardiovascular risk.

[0288] based on Fig.13 It can be seen from the embodiment that the wearable device 100 can obtain the peripheral arterial pulse wave signal A2 corresponding to the constant pressure control segment A, the peripheral arterial pulse wave signal B2 corresponding to the constant pressure control segment B, the peripheral arterial pulse wave signal C2 corresponding to the constant pressure control segment C, and the peripheral arterial pulse wave signal D2 corresponding to the constant pressure control segment D.

[0289] In one possible implementation, Fig.16 As shown, the wearable device 100 can filter out a peripheral arterial pulse wave signal with a better waveform from the peripheral arterial pulse wave signals corresponding to the above-mentioned constant pressure control sections. The screening rule can be that the amplitude change of the peripheral arterial pulse wave signal is small. The screening rule can also be other rules, which are not limited in this application.

[0290] For example, Fig.16 As shown, the wearable device 100 can filter out the peripheral arterial pulse wave signal C2 with a better waveform from the peripheral arterial pulse wave signal A2, the peripheral arterial pulse wave signal B2, the peripheral arterial pulse wave signal C2 and the peripheral arterial pulse wave signal D2.

[0291] Afterwards, the wearable device 100 can obtain the central artery pulse wave signal based on the peripheral artery pulse wave signal C2.

[0292] In some embodiments, the wearable device 100 can obtain the central artery pulse wave signal based on the peripheral artery pulse wave signal C2 through the target model 1.

[0293] Optionally, the target model 1 may be composed of transfer functions.

[0294] The target model 1 may be trained by the wearable device 100 , or may be trained by a server or other device. The wearable device 100 may directly obtain the trained target model 1 and use the target model 1 .

[0295] Next, we will introduce how to train target model 1.

[0296] First, a large amount of training data is obtained. The training data includes a peripheral artery pulse wave signal and a central artery pulse wave signal corresponding to the peripheral artery pulse wave signal. The peripheral artery pulse wave signal in the training data is input into the target model 1, and the target model 1 can output the peripheral artery pulse wave signal. The similarity between the peripheral artery pulse wave signal output by the target model 1 and the peripheral artery pulse wave signal in the training data is compared. When the similarity is less than a preset value, the parameter information of the target model 1 is adjusted. The peripheral artery pulse wave signal in the training data is input into the target model 1 again, and the target model 1 can output the peripheral artery pulse wave signal. The similarity between the peripheral artery pulse wave signal output by the target model 1 and the peripheral artery pulse wave signal in the training data is compared. When the similarity is less than a preset value, the above steps are repeated until the similarity between the peripheral artery pulse wave signal output by the target model 1 and the peripheral artery pulse wave signal in the training data is greater than a preset value, and the training of the target model 1 is completed. The input of the trained target model 1 is the peripheral artery pulse wave signal, and the output of the trained target model 1 is the central artery pulse wave signal.

[0297] The wearable device 100 can obtain the central artery pulse wave signal based on the trained target model 1 and the peripheral artery pulse wave signal C2.

[0298] For example, Fig.17 As shown, after the wearable device 100 obtains the peripheral arterial pulse wave signal C2, the wearable device 100 can input the peripheral arterial pulse wave signal C2 into the trained target model 1, and the trained target model 1 can output the central artery pulse wave signal corresponding to the peripheral arterial pulse wave signal C2.

[0299] Optionally, after the wearable device 100 obtains the trained target model 1, the wearable device 100 may periodically / irregularly update the target model 1 to improve the accuracy of the target model 1 in obtaining the central artery pulse wave signal based on the peripheral artery pulse wave signal.

[0300] In some embodiments, after the wearable device 100 obtains the central arterial pulse wave signal, the wearable device 100 can evaluate the user's physical condition based on the central arterial pulse wave signal. For example, the wearable device 100 can obtain parameter information for evaluating cardiovascular disease based on the central arterial pulse wave signal, and the parameter information for evaluating cardiovascular disease includes but is not limited to one or more of the following: heart rate, vascular wall elasticity, cardiac ejection capacity, vascular peripheral resistance, etc.

[0301] Fig.18 A schematic diagram showing a central artery pulse wave signal acquired within one cycle is shown.

[0302] The wearable device 100 can determine parameter information for evaluating cardiovascular disease based on the time corresponding to the characteristic points of the central arterial pulse wave signal and the central arterial pressure value.

[0303] For example, Fig.18 As shown, the wearable device 100 can obtain characteristic points a, b and c from the central arterial pulse wave signal. Among them, characteristic point a represents the position where the central arterial pressure is the largest at time t1, and the maximum central arterial pressure is H1. Characteristic point b represents the position where the central arterial pressure is the second largest at time t2, and the second largest central arterial pressure is H2. Characteristic point c represents the position where the central arterial pressure is the smallest at time t3, and the minimum central arterial pressure is H3.

[0304] Among them, H2 / H1 can represent the elasticity of the blood vessel wall, H3 / H1 can represent the peripheral blood vessel resistance, T1 / T4 can represent the heart's ejection capacity, and T3 / T2 can represent the heart rate, etc.

[0305] Not limited to parameter information such as heart rate, vascular wall elasticity, cardiac ejection capacity, and peripheral vascular resistance, the wearable device 100 can also obtain other more or less parameter information for evaluating cardiovascular disease from the central arterial pulse wave signal, and this application does not limit this.

[0306] 4. The wearable device 100 obtains the central arterial blood pressure value based on the peripheral arterial blood pressure value and the central arterial pulse wave signal.

[0307] Peripheral arterial blood pressure values ​​may include peripheral arterial systolic pressure, peripheral arterial diastolic pressure and peripheral arterial mean pressure.

[0308] Central aortic blood pressure values ​​may include central aortic systolic pressure, central aortic diastolic pressure, and central aortic mean pressure.

[0309] The wearable device 100 can obtain the central arterial blood pressure value based on the peripheral arterial blood pressure value and the central arterial pulse wave signal.

[0310] In some embodiments, the wearable device 100 can obtain the central arterial blood pressure value based on the peripheral arterial blood pressure value and the central arterial pulse wave signal through the target model 2.

[0311] Optionally, the target model 2 may be composed of transfer functions.

[0312] The target model 2 may be trained by the wearable device 100 , or may be trained by a server or other device. The wearable device 100 may directly obtain the trained target model 2 and use the target model 2 .

[0313] Next, we will introduce how to train target model 2.

[0314] First, a large amount of training data is obtained. The training data includes peripheral arterial blood pressure values, central arterial pulse wave signals, and central arterial blood pressure values ​​corresponding to the peripheral arterial blood pressure values. The peripheral arterial blood pressure values ​​and central arterial pulse wave signals in the training data are input into the target model 2, and the target model 2 can output the central arterial blood pressure values. The difference between the central arterial blood pressure values ​​output by the target model 2 and the central arterial blood pressure values ​​corresponding to the peripheral arterial blood pressure values ​​in the training data is compared. When the difference is greater than the preset value, the parameter information of the target model 2 is adjusted. The peripheral arterial blood pressure values ​​and central arterial pulse wave signals in the training data are input into the target model 2 again, and the target model 2 can output the central arterial blood pressure values. The similarity between the central arterial blood pressure values ​​output by the target model 1 and the central arterial blood pressure values ​​corresponding to the peripheral arterial blood pressure values ​​in the training data is compared. When the difference is greater than the preset value, the above steps are repeated until the difference between the central arterial blood pressure values ​​output by the target model 2 and the central arterial blood pressure values ​​corresponding to the peripheral arterial blood pressure values ​​in the training data is less than the preset value, and the training of the target model 2 is completed. The input of the trained target model 2 is the peripheral arterial blood pressure value and the central arterial pulse wave signal, and the output of the trained target model 2 is the central arterial blood pressure value.

[0315] The wearable device 100 can obtain the central arterial pulse wave signal based on the trained target model 2 based on the peripheral arterial blood pressure value and the central arterial pulse wave signal.

[0316] In some embodiments, in addition to the two methods described above, the peripheral artery pulse wave signal of the constant pressure control section is obtained to obtain the central artery pulse wave signal.

[0317] In other embodiments, the wearable device 100 may also be combined with a PPG module to obtain a peripheral artery pulse wave signal in a constant pressure control segment to obtain a central artery pulse wave signal.

[0318] The embodiments of the present application provide two other methods for obtaining the peripheral arterial pulse wave signal of the constant pressure control segment in combination with the PPG module.

[0319] Method 3: When the air pressure in the airbag 213G is kept constant, the peripheral arterial pulse wave signal of the constant pressure control section is obtained based on the PPG module.

[0320] Exemplarily, the air pressure in the airbag 213G can be kept constant near the average pressure. Not limited to the average pressure, the air pressure in the airbag 213G can also be kept constant at other pressure values, which is not limited in this application.

[0321] When the blood pressure measurement starts, the wearable device 100 can inflate the airbag 213G at the inflation rate v1 through the micro pump 213C. When it is detected that the pressure in the airbag 213G is equal to the average pressure, the micro pump 213C inflates the airbag 213G at the inflation rate v1-v2, or the micro pump 213C continues to inflate the airbag 213G at the inflation rate v1, but the wearable device 100 needs to open the air valve 213D and control the air valve 213D to discharge the gas in the airbag 213G at the deflation rate v1-v2, so that the air pressure in the airbag 213G is stabilized near the average pressure.

[0322] like Fig.19 As shown in (a) and (b), after the air pressure in the airbag 213G is stabilized near the average pressure, the wearable device 100 can collect the peripheral arterial pulse wave signal through the PPG module. The peripheral arterial pulse wave signal collected by the PPG module is collected when the air pressure in the airbag 213G is constant.

[0323] In some embodiments, after obtaining the peripheral arterial pulse wave signal, the wearable device 100 can be based on Fig.19 The peripheral arterial pulse wave signal shown in (b) of FIG19 is used to obtain the central arterial pulse wave signal, so as to analyze whether the user has cardiovascular risk. For how the wearable device 100 obtains the central arterial pulse wave signal based on the peripheral arterial pulse wave signal shown in (b) of FIG19 , and how to obtain parameter information for evaluating cardiovascular disease based on the central arterial pulse wave signal, please refer to Fig.17 and Fig.18 The description in , this application will not be repeated here.

[0324] After acquiring the peripheral arterial pulse wave signal, the wearable device 100 can determine the peripheral arterial pressure signal based on the peripheral arterial pulse wave signal, and then acquire the peripheral arterial pressure value based on the peripheral arterial pressure signal.

[0325] Specifically, Fig. 20A As shown in (a) and (b) in FIG. 1 , when the peripheral arterial pulse wave signal collected by the PPG module is Fig. 20A The waveform shown in (a) changes to Fig. 20A When the waveform shown in (b) is obtained, the change trend of blood pressure can be obtained, so that the peripheral arterial pressure signal is changed from Fig. 20B The waveform shown in (a) changes to Fig. 20B The waveform shown in (b) in .

[0326] Fig. 20B The waveform shown in (b) is a peripheral arterial pressure signal within a cycle. The wearable device 100 can be based on Fig. 20BThe peripheral arterial pressure signal shown in (b) in the figure is used to obtain the peripheral arterial pressure value. The peripheral arterial pressure value includes the peripheral arterial systolic pressure and the peripheral arterial diastolic pressure.

[0327] Fig. 20B As shown in (b), the maximum peak value of the peripheral arterial pressure signal is the systolic pressure, and the minimum valley value of the peripheral arterial pressure signal is the diastolic pressure.

[0328] In some embodiments, after obtaining the peripheral arterial pressure value and the central arterial pulse wave signal, the wearable device 100 can obtain the central arterial pressure value based on the peripheral arterial pressure value and the central arterial pulse wave signal. For details, please refer to the description in the previous part, and this application will not repeat them here.

[0329] Method 4: The wearable device 100 obtains a central arterial pulse wave signal, a peripheral arterial blood pressure value, and a central arterial blood pressure value based on the PPG signal collected by the PPG module.

[0330] In methods 1 to 3, the wearable device 100 measures the user's blood pressure by inflating and deflating the airbag, which affects the user's rest. In order to avoid affecting the user, the wearable device 100 can obtain the user's blood pressure by measuring the PPG signal to reduce the impact on the user's sleep.

[0331] In some embodiments, the wearable device 100 can obtain a central arterial pulse wave signal, a peripheral arterial blood pressure value, and a central arterial blood pressure value through the target model 3 based on the PPG signal collected by the PPG module.

[0332] Target model 3 represents the corresponding relationship between the PPG signal and the central arterial pulse wave signal, the peripheral arterial blood pressure value and the central arterial blood pressure value.

[0333] For example, before the wearable device 100 leaves the factory, the wearable device 100 is pre-configured with the target model 3, or the wearable device 100 can dynamically obtain the target model 3 from the server, and the input of the target model 3 can be the PPG signal measured by the wearable device 100 through the PPG module, and the output of the target model 3 can be the central arterial pulse wave signal, the peripheral arterial blood pressure value, and the central arterial blood pressure value. In other words, when the PPG signal measured by the wearable device 100 is input into the target model 3, the central arterial pulse wave signal, the peripheral arterial blood pressure value, and the central arterial blood pressure value can be obtained through the target model 3.

[0334] Next, the training process of target model 3 is introduced.

[0335] The training process of target model 3 specifically includes: obtaining a large amount of training data. The training data includes a PPG signal and a central arterial pulse wave signal, a peripheral arterial blood pressure value, and a central arterial blood pressure value corresponding to the PPG signal. The PPG signal in the training data is input into target model 3, and target model 3 can output a central arterial pulse wave signal, a peripheral arterial blood pressure value, and a central arterial blood pressure value. Compare the similarity between the central arterial pulse wave signal, the peripheral arterial blood pressure value, and the central arterial blood pressure value output by target model 1 and the central arterial pulse wave signal, the peripheral arterial blood pressure value, and the central arterial blood pressure value in the training data. When the similarity is less than a preset value, adjust the parameter information of target model 3. Input the PPG signal in the training data into target model 3 again, and target model 3 can output a central arterial pulse wave signal, a peripheral arterial blood pressure value, and a central arterial blood pressure value. Compare the similarity between the central arterial pulse wave signal, the peripheral arterial blood pressure value, and the central arterial blood pressure value output by target model 3 and the central arterial pulse wave signal, the peripheral arterial blood pressure value, and the central arterial blood pressure value in the training data. When the similarity is less than the preset value, the above steps are repeated until the similarity between the central artery pulse wave signal, peripheral arterial blood pressure value and central arterial blood pressure value output by the target model 3 and the central arterial pulse wave signal, peripheral arterial blood pressure value and central arterial blood pressure value in the training data is greater than the preset value, and the training of the target model 3 is completed. The input of the trained target model 3 is the PPG signal, and the output of the trained target model 3 is the central arterial pulse wave signal, peripheral arterial blood pressure value and central arterial blood pressure value.

[0336] In some embodiments, in order to improve the accuracy of the target model 3, multiple sets of PPG signals and central arterial pulse wave signals, peripheral arterial blood pressure values, and central arterial blood pressure values ​​corresponding to the PPG signals may be used periodically / irregularly to update the target model 3 to obtain the target model 4. Since the target model 4 is obtained by updating the target model 3 based on the user's own multiple sets of PPG signals and central arterial pulse wave signals, peripheral arterial blood pressure values, and central arterial blood pressure values ​​corresponding to the PPG signals, the central arterial pulse wave signals, peripheral arterial blood pressure values, and central arterial blood pressure values ​​of the user obtained through the target model 4 and based on the PPG signals are more accurate than the target model 3.

[0337] In some embodiments, after acquiring the blood pressure measurement value and the parameter information for evaluating cardiovascular disease, the wearable device 100 may display the blood pressure measurement value and the parameter information for evaluating cardiovascular disease.

[0338] In some embodiments, after the wearable device 100 obtains the blood pressure measurement value and the parameter information for evaluating cardiovascular disease, the wearable device 100 may display Fig.21AThe user interface 2100 shown includes peripheral blood pressure measurement values, central blood pressure measurement values, and parameter information for evaluating cardiovascular disease. The blood pressure measurement values ​​may include high pressure and low pressure. For example, the peripheral arterial systolic pressure may be 130 mmHg, and the peripheral arterial diastolic pressure may be 80 mmHg. The central arterial systolic pressure may be 140 mmHg, and the central arterial diastolic pressure may be 90 mmHg. The parameter information for evaluating cardiovascular disease may include: heart rate is 96 beats / min, vascular wall elasticity is good, cardiac ejection capacity is 65%, and peripheral vascular resistance is 0.9.

[0339] In other embodiments, after the wearable device 100 obtains the blood pressure measurement value and the parameter information for evaluating cardiovascular disease, the wearable device 100 can send the blood pressure measurement value and the parameter information for evaluating cardiovascular disease to an electronic device, and the electronic device displays the blood pressure measurement value and the parameter information for evaluating cardiovascular disease.

[0340] In some embodiments, the wearable device 100 can save the blood pressure measurement values ​​and parameter information for evaluating cardiovascular diseases within a first time period before the current time, and delete the blood pressure measurement values ​​and parameter information for evaluating cardiovascular diseases that exceed the first time period to save storage space of the wearable device 100.

[0341] Optionally, the wearable device 100 may also receive a user operation to view blood pressure measurement values ​​and parameter information for evaluating cardiovascular diseases within a certain period of time.

[0342] Exemplarily, the certain period of time may be 24 hours.

[0343] like Fig. 21B As shown, after the wearable device 100 obtains the blood pressure measurement value and the parameter information for evaluating cardiovascular disease, the wearable device 100 can display Fig. 21B User interface 2200 is shown. User interface 2200 is similar to user interface 2100. The difference is that user interface 2200 also includes icon 2201, which is used to display blood pressure measurement values ​​and parameter information for evaluating cardiovascular diseases within a certain period of time.

[0344] like Fig. 21B As shown, the wearable device 100 can receive an input operation (e.g., a click) from a user on an icon 2201 in the user interface 2200. In response to the user's input operation, the wearable device 100 can obtain the blood pressure measurement value and parameter information for evaluating cardiovascular disease of the user within a certain period of time, and display the blood pressure measurement value and parameter information for evaluating cardiovascular disease of the user within a certain period of time. Fig. 21C User interface 2300 is shown.

[0345] The user interface 2300 includes a graphic display area for blood pressure measurements within 24 hours. The graphic display area includes a 24-hour peripheral artery systolic pressure measurement value curve, a 24-hour central artery systolic pressure measurement value curve, a 24-hour peripheral artery diastolic pressure measurement value curve, and a 24-hour central artery diastolic pressure measurement value curve. Through the graphic display area, the user's blood pressure change trend within 24 hours can be intuitively viewed.

[0346] User interface 2300 also includes parameter information for evaluating cardiovascular disease within 24 hours, such as heart rate of 98 beats / min, good vascular wall elasticity, cardiac ejection capacity of 70%, and vascular peripheral resistance of 0.85.

[0347] Not limited to 24 hours, the wearable device 100 can also display blood pressure monitoring values ​​within other longer or shorter time periods, and this application does not limit this.

[0348] Fig. 22 A schematic diagram of a blood pressure measurement method provided in this application.

[0349] S2201. Within a first time period, the wearable device inflates an airbag and obtains a first pulse wave signal. Within the first time period, the air pressure within the airbag gradually increases with time, wherein the first pulse wave signal is used to obtain a first blood pressure measurement value.

[0350] The first blood pressure measurement value may be a blood pressure value of a part where the wearable device is worn measured by the wearable device. For example, when the wearable device is worn on a user's wrist, the first blood pressure measurement value may be a blood pressure value on the user's wrist.

[0351] The first time period can be Figure 6 The time period corresponding to one or more linear boost sections shown in FIG.

[0352] The first pulse wave signal may be Fig.13 The peripheral arterial pulse wave corresponding to one or more linear pressure increasing segments shown in FIG.

[0353] S2202. During a second time period, the wearable device inflates the airbag and obtains a second pulse wave signal. During the second time period, the air pressure in the airbag remains unchanged or fluctuates within a first range. The second pulse wave signal is used to assess cardiovascular risk.

[0354] The second time period can be Figure 6 The time period corresponding to one or more constant voltage control sections shown in FIG.

[0355] The second pulse wave signal may be Fig.13 The peripheral arterial pulse wave corresponding to one or more constant pressure control segments shown in FIG.

[0356] In a possible implementation, cardiovascular risk includes any one or more of the following: heart rate, vascular wall elasticity, cardiac ejection capacity, and peripheral vascular resistance.

[0357] S2203. The wearable device outputs a first blood pressure measurement value and a cardiovascular risk.

[0358] The wearable device outputs the first blood pressure measurement value and the cardiovascular risk, which may include the wearable device displaying the first blood pressure measurement value and the cardiovascular risk, or playing the first blood pressure measurement value and the cardiovascular risk by voice, or sending the first blood pressure measurement value and the cardiovascular risk to other devices for display.

[0359] Through this method, the wearable device can not only obtain the peripheral arterial blood pressure value, but also monitor the user's cardiovascular disease risk and prevent the occurrence of cardiovascular disease.

[0360] In a possible implementation, the method also includes: the wearable device obtains a third pulse wave signal based on the second pulse wave signal and the first target model; and the wearable device obtains a second blood pressure measurement value based on the first blood pressure measurement value and the third pulse wave signal.

[0361] Among them, the first blood pressure measurement value may be a central arterial blood pressure value. The central arterial blood pressure value may refer to the blood pressure of the aorta, which is the pressure directly faced by the heart and other organs. Since the aorta is closer to the heart and brain, the central arterial blood pressure value is more meaningful for judging the user's blood pressure risk than the peripheral arterial blood pressure value.

[0362] The third pulse wave signal may be a central pulse wave signal. The first target model may be Fig.17 The target model 1 shown in the embodiment.

[0363] Through this method, the wearable device can obtain the central arterial blood pressure value while obtaining the peripheral arterial blood pressure value.

[0364] In one possible implementation, before the wearable device obtains the first blood pressure measurement value based on the first pulse wave signal, the method also includes: within a third time period, the wearable device inflates the airbag and obtains a fourth pulse wave signal, and the air pressure in the airbag gradually increases with time within the third time period; the wearable device splices the first pulse wave signal and the fourth pulse wave signal in chronological order to obtain a fifth pulse wave signal, wherein the fifth pulse wave signal is used to obtain the first blood pressure measurement value.

[0365] Optionally, the wearable device can obtain a first blood pressure measurement value based on the fifth pulse wave signal and the airbag pressure signals corresponding to the first time period and the third time period.

[0366] The wearable device measures blood pressure through a complete inflation-deflation process. During the complete inflation-deflation process, the wearable device can obtain pulse wave signals of multiple linear boost segments. The wearable device can splice the pulse wave signals of multiple linear boost segments into a complete pulse wave signal, and obtain the first blood pressure measurement value based on the complete pulse wave signal.

[0367] The third time period can be Figure 6 The time period corresponding to one or more linear boost sections shown in FIG.

[0368] The fourth pulse wave signal may be Fig.13 The peripheral arterial pulse wave corresponding to one or more linear pressure increasing segments shown in FIG.

[0369] The fifth pulse wave signal can be Fig.14 Peripheral arterial pulse wave shown.

[0370] In one possible implementation, before the wearable device outputs the first blood pressure measurement value and cardiovascular risk, the method also includes: within a fourth time period, the wearable device inflates the airbag and obtains a sixth pulse wave signal, and the air pressure in the airbag remains unchanged or the air pressure in the airbag fluctuates within a first range within the fourth time period; the wearable device obtains a second pulse wave signal, specifically including: the wearable device selects a second pulse wave signal with a better signal from the second pulse wave signals and.

[0371] Optionally, the wearable device may obtain a third pulse wave signal based on the second pulse wave signal and the first target model; the wearable device may obtain parameter information for assessing cardiovascular risk based on the third pulse wave signal.

[0372] Wearable devices measure blood pressure through a complete inflation-deflation process. During the inflation-deflation process, the wearable device can obtain pulse wave signals of multiple constant pressure control segments.

[0373] In a possible implementation, the wearable device can screen a pulse wave signal with a better signal from the pulse wave signals of multiple constant pressure control segments, and obtain a central pulse wave signal based on the pulse wave signal, and then assess cardiovascular risk based on the central pulse wave signal.

[0374] In other possible implementations, the wearable device can obtain a central pulse wave signal based on the pulse wave signal of each constant pressure control segment, and then evaluate the cardiovascular risk based on each central pulse wave signal, and finally average the multiple cardiovascular risks to obtain the final cardiovascular risk.

[0375] Among them, the fourth time period can be Figure 6The time period corresponding to one or more constant voltage control sections shown in FIG.

[0376] The sixth pulse wave signal may be Fig.13 The peripheral arterial pulse wave corresponding to one or more constant pressure control segments shown in FIG.

[0377] For details, please refer to Figure 16-18 Description in the examples.

[0378] In a possible implementation, the blood pressure measurement device also includes a driving circuit, a micropump and an air pressure sensor, the driving circuit is used to control the inflation rate of the micropump into the airbag, the air pressure sensor is used to obtain an arterial pulse wave signal, and the deflation rate of the micropump is a first deflation rate; the wearable device inflates the airbag and obtains a first pulse wave signal, specifically including: the wearable device controls the driving circuit to a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, and obtains the first pulse wave signal through the air pressure sensor, wherein the first inflation rate is greater than the first deflation rate.

[0379] In combination with the first aspect, in a possible implementation, the wearable device inflates the airbag and obtains a second pulse wave signal, specifically including: the wearable device controls the driving circuit to a second duty cycle, controls the micropump through the driving circuit to inflate the airbag at a second inflation rate, and obtains the second pulse wave signal through the air pressure sensor, wherein the second duty cycle is less than the first duty cycle, the second inflation rate is less than the first inflation rate, and the second inflation rate is equal to the first deflation rate.

[0380] In combination with the first aspect, in a possible implementation, the blood pressure measurement device also includes an air valve, which is used to discharge the gas in the airbag; in the process of the wearable device acquiring the first pulse wave signal and the second pulse wave signal, the method also includes: the wearable device closing the air valve.

[0381] In some embodiments, the wearable device can control the increase and constancy of the air pressure in the airbag by adjusting the inflation speed of the micropump to obtain the first blood pressure measurement value and cardiovascular risk.

[0382] For details, please refer to Figure 7-Figure 9 Description in the examples.

[0383] In a possible implementation, the blood pressure measurement device further includes a driving circuit, a micro pump, an air pressure sensor, and an air valve, wherein the driving circuit is used to control the inflation rate of the micro pump into the air bag, the air pressure sensor is used to obtain an arterial pulse wave signal, the air valve is used to discharge the gas in the air bag, and the deflation rate of the micro pump is a first deflation rate; the wearable device inflates the air bag and obtains the first pulse wave signal, specifically including:

[0384] The wearable device controls the driving circuit to have a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, closes the air valve, and obtains a first pulse wave signal through the air pressure sensor, wherein the first inflation rate is greater than the first deflation rate.

[0385] In combination with the first aspect, in a possible implementation, the wearable device inflates the airbag and obtains a second pulse wave signal, specifically including: the wearable device controls the driving circuit to have a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, opens the air valve and discharges the gas in the airbag through the air valve at a second deflation rate, wherein the first inflation rate is equal to the sum of the first deflation rate and the second deflation rate.

[0386] In some embodiments, the wearable device can adjust the inflation speed of the micropump to remain constant, and control the deflation speed of the air valve to make the air pressure in the airbag rise and remain constant, so as to obtain the first blood pressure measurement value and cardiovascular risk.

[0387] For details, please refer to Figure 10-12 Description in the examples.

[0388] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0389] It is understandable that the various user interfaces described in the embodiments of the present application are only example interfaces and do not limit the present application scheme. In other embodiments, the user interface may adopt a different interface layout, may include more or fewer controls, and may increase or decrease other functional options, as long as they are based on the same inventive concept provided by the present application, they are all within the scope of protection of the present application.

[0390] It should be noted that, without causing any contradiction or conflict, any feature in any embodiment of the present application, or any part of any feature, can be combined, and the combined technical solution is also within the scope of the embodiments of the present application.

[0391] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A blood pressure measurement method, characterized in that: The method is applied to a wearable device, the wearable device includes a blood pressure measuring device, the blood pressure measuring device includes an air bag, and the method includes: In a first time period, the wearable device inflates the airbag and obtains a first pulse wave signal, and the air pressure in the airbag gradually increases over time in the first time period, wherein the first pulse wave signal is used to obtain a first blood pressure measurement value; In a second time period, the wearable device inflates the airbag and obtains a second pulse wave signal, wherein the air pressure in the airbag remains unchanged or fluctuates within a first range during the second time period, wherein the second pulse wave signal is used to assess cardiovascular risk; The wearable device outputs the first blood pressure measurement and the cardiovascular risk.

2. The method according to claim 1, characterized in that The method further comprises: The wearable device acquires a third pulse wave signal based on the second pulse wave signal and the first target model; The wearable device obtains a second blood pressure measurement value based on the first blood pressure measurement value and the third pulse wave signal.

3. The method according to claim 1 or 2, characterized in that: The cardiovascular risk includes any one or more of the following: heart rate, vascular wall elasticity, cardiac ejection capacity, and peripheral vascular resistance.

4. The method according to any one of claims 1 to 3, characterized in that: Before the wearable device outputs the first blood pressure measurement value and the cardiovascular risk, the method further includes: In a third time period, the wearable device inflates the airbag and acquires a fourth pulse wave signal, and the air pressure in the airbag gradually increases over time in the third time period; The wearable device splices the first pulse wave signal and the fourth pulse wave signal in chronological order to obtain a fifth pulse wave signal, wherein the fifth pulse wave signal is used to obtain the first blood pressure measurement value; The wearable device obtains the first blood pressure measurement value based on the fifth pulse wave signal and the airbag pressure signals corresponding to the first time period and the third time period.

5. The method according to any one of claims 1 to 3, characterized in that: Before the wearable device outputs the first blood pressure measurement value and the cardiovascular risk, the method further includes: In a fourth time period, the wearable device inflates the airbag and obtains a sixth pulse wave signal, and the air pressure in the airbag remains unchanged or fluctuates within the first range in the fourth time period; The wearable device acquires a second pulse wave signal, specifically comprising: The wearable device selects the second pulse wave signal having a better signal from the second pulse wave signal and the sixth pulse wave signal.

6. The method according to any one of claims 1 to 5, characterized in that: The blood pressure measurement device further includes a driving circuit, a micro pump and an air pressure sensor, wherein the driving circuit is used to control the inflation rate of the micro pump into the air bag, the air pressure sensor is used to obtain an arterial pulse wave signal, and the deflation rate of the micro pump is a first deflation rate; the wearable device inflates the air bag and obtains the first pulse wave signal, specifically including: The wearable device controls the driving circuit to have a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, and obtains the first pulse wave signal through the air pressure sensor, wherein the first inflation rate is greater than the first deflation rate.

7. The method according to claim 6, characterized in that The wearable device inflates the airbag and obtains a second pulse wave signal, specifically including: The wearable device controls the driving circuit to a second duty cycle, controls the micropump through the driving circuit to inflate the airbag at a second inflation rate, and obtains the second pulse wave signal through the air pressure sensor, wherein the second duty cycle is smaller than the first duty cycle, the second inflation rate is smaller than the first inflation rate, and the second inflation rate is equal to the first deflation rate.

8. The method according to claim 6 or 7, characterized in that: The blood pressure measurement device further includes an air valve, which is used to discharge the gas in the airbag; in the process of the wearable device acquiring the first pulse wave signal and the second pulse wave signal, the method further includes: The wearable device closes the air valve.

9. The method according to any one of claims 1 to 5, characterized in that: The blood pressure measurement device further includes a driving circuit, a micro pump, an air pressure sensor and an air valve, wherein the driving circuit is used to control the inflation rate of the micro pump into the air bag, the air pressure sensor is used to obtain an arterial pulse wave signal, the air valve is used to discharge the gas in the air bag, and the deflation rate of the micro pump is a first deflation rate; the wearable device inflates the air bag and obtains a first pulse wave signal, specifically including: The wearable device controls the driving circuit to a first duty cycle, controls the micropump through the driving circuit to inflate the airbag at a first inflation rate, closes the air valve, and obtains the first pulse wave signal through the air pressure sensor, wherein the first inflation rate is greater than the first deflation rate.

10. The method according to claim 9, characterized in that The wearable device inflates the airbag and obtains a second pulse wave signal, specifically including: The wearable device controls the driving circuit to have the first duty cycle, controls the micropump through the driving circuit to inflate the airbag at the first inflation rate, opens the air valve and discharges the gas in the airbag through the air valve at a second deflation rate, wherein the first inflation rate is equal to the sum of the first deflation rate and the second deflation rate.

11. The method according to any one of claims 8 to 10, characterized in that: After the wearable device acquires the first pulse wave signal and the second pulse wave signal, the method further includes: The wearable device opens the air valve and discharges the gas in the airbag through the air valve.

12. A wearable device, characterized in that: The wearable device includes a blood pressure measuring device, a memory, and a processor; wherein the blood pressure measuring device, the memory, and the processor are coupled, and the memory is used to store a computer program. When the processor executes and calls the computer program, the wearable device executes the method described in any one of claims 1-11.

13. A computer-readable storage medium comprising instructions, characterized in that: When the instruction is executed on the wearable device, the wearable device executes the method described in any one of claims 1-11.

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