WO2022111422A1

WO2022111422A1 - Blood pressure measuring device and pressurization method thereof

Info

Publication number: WO2022111422A1
Application number: PCT/CN2021/132165
Authority: WO
Inventors: 黄振龙; 傅小煜; 周林峰
Original assignee: 华为技术有限公司
Priority date: 2020-11-25
Filing date: 2021-11-22
Publication date: 2022-06-02
Also published as: CN114533009B; CN114533009A

Abstract

A blood pressure measuring device (1000) and a pressurization method thereof, which can pressurize an airbag (1001) by stages at different rates on the basis of an estimated blood pressure range of a user, thereby effectively reducing blood pressure measurement time and improving user experience. The device (1000) comprises the airbag (1001), a pump (1002), a pulse wave sensor (1003), an air pressure sensor (1004), and a signal processing unit (1005). The pulse wave sensor (1003) is used for acquiring pulse wave signals of a user, and sending the pulse wave signals to the signal processing unit (1005). The air pressure sensor (1004) is used for acquiring internal gas pressure signals of the airbag (1001), and sending the pressure signals to the signal processing unit (1005). The signal processing unit (1005) is used for: estimating a blood pressure range of the user on the basis of the pulse wave signals, and determining a first threshold; controlling the pump (1002) to pressurize the airbag (1001) according to a first rate until the pressure signal of the airbag (1001) reaches a first threshold; and continuing to control the pump (1002) to pressurize the airbag (1001) according to a second rate, and during the pressurization process, collecting data for the blood pressure measurement of the user.

Description

Blood pressure measuring device and pressurizing method thereof

This application claims the priority of the Chinese patent application with the application number 202011345994.2 and the application title "Blood Pressure Measuring Device and Compression Method", which was filed with the China Patent Office on November 25, 2020, the entire contents of which are incorporated herein by reference. middle.

technical field

The present application relates to the technical field of blood pressure measurement, and in particular, to a blood pressure measurement device and a pressurizing method thereof.

Background technique

Blood pressure measurement is an essential requirement in people's daily life. Traditional electronic sphygmomanometers (for example, arm sphygmomanometers, or wrist sphygmomanometers) are all based on oscillometric methods for blood pressure measurement. Electronic sphygmomanometers are large in size and weight, and can only be used for a single indoor blood pressure measurement. , not suitable for long-term wear. In order to further reduce the volume of the electronic sphygmomanometer, achieve the purpose of thin and light design, and realize the wearable solution of the electronic sphygmomanometer, a wearable blood pressure measurement device based on the oscillometric method has been designed, which is convenient for users to carry and measure. blood pressure.

Compared with the traditional arm-type sphygmomanometer or wrist-type sphygmomanometer, the width of the airbag used by the above-mentioned blood pressure measuring device is narrower. In the process of blood pressure measurement, the narrower the air bag, the higher the pressure needs to be inflated to reach the maximum amplitude of the pulse wave envelope and the longer the inflation time. In this way, during the blood pressure measurement process, the measurement time is long, the air bag presses the user for a long time, and the pressure is large, and the user experience is not good.

SUMMARY OF THE INVENTION

The present application proposes a blood pressure measurement device and a pressurizing method thereof, which are beneficial to reduce blood pressure measurement time, realize rapid blood pressure measurement, and improve user experience.

In a first aspect, a blood pressure measurement device is provided, the device includes an air bag, a pump, a pulse wave sensor, an air pressure sensor, and a signal processing unit; the pulse wave sensor, the air pressure sensor and the pump are respectively associated with the signal The processing unit is connected, and the pump is connected with the air bag, the blood pressure measuring device can be worn by the user and applies pressure to the user through the air bag; wherein the pulse wave sensor is used for: acquiring the user's blood pressure pulse wave signal, and send the pulse wave signal to the signal processing unit; the air pressure sensor is used to: acquire the gas pressure signal inside the airbag, and send the pressure signal to the signal processing unit; The signal processing unit is configured to: estimate the blood pressure range of the user based on the pulse wave signal; determine a first threshold based on the blood pressure range; control the pump to pressurize the air bag at a first rate, Until the pressure signal of the airbag reaches the first threshold; continue to control the pump to pressurize the airbag at a second rate, and control the air pressure sensor to pressurize the airbag at the second rate by the pump. Data for blood pressure measurement of the user is collected during compression; wherein the first rate is greater than the second rate.

In the embodiment of the present application, the blood pressure measurement device can obtain the user's pulse wave signal through the pulse wave sensor, and then use the signal processing unit to estimate the user's blood pressure range according to the pulse wave signal, and determine the first threshold based on the blood pressure range to The first threshold is a dividing line, and the blood pressure measuring device firstly pressurizes the air bag rapidly through the pump, and then normal pressurizes the air bag through the pump. During the normal compression phase, the blood pressure measurement device can collect user data for subsequent blood pressure measurement.

Therefore, the blood pressure measurement device of the embodiment of the present application makes the pressurization process more intelligent, can reduce the compression time of the airbag on the user, shorten the blood pressure measurement time of the user, realize rapid blood pressure measurement, and improve user experience. In addition, since the blood pressure measurement time is shortened, the inflation time of the airbag will be reduced, which can reduce the power consumption of the blood pressure measurement device, and is beneficial to improve the battery life of the whole machine.

It should be understood that the range above the above-mentioned first threshold is an effective pressurized segment in the blood pressure measurement process based on the oscillometric method, that is, the blood pressure measurement device can collect valid data within this range; the range below the first threshold is based on the display. The invalid pressure section in the blood pressure measurement process of the wave method, that is, the blood pressure measurement device does not need to collect data within this range, or the data collected by the blood pressure measurement device within this range is invalid.

Optionally, in order to ensure that the range above the first threshold can include an effective pressurized segment for actual blood pressure measurement, the blood pressure measurement device can expand the estimated range of the user's blood pressure to determine the first threshold.

Exemplarily, the above-mentioned second rate may be a linear boost rate based on an oscillometric method, generally 3-5 mmHg/s (millimeters of mercury/second). Exemplarily, the above-mentioned first rate may be a rate corresponding to the maximum suitable power of the blood pressure measuring device, and the maximum suitable power may refer to the maximum power for driving the pump to restart quickly without affecting the overall operation of the blood pressure measuring device.

It should be understood that the blood pressure measuring device can obtain the pulse wave signal of the user through the pulse wave sensor, and estimate the blood pressure range of the user according to the pulse wave signal. There is a correlation between the pulse wave signal and the user's blood pressure. Exemplarily, the blood pressure measurement device may perform weighted summation on each feature of the pulse wave signal through a linear model between each feature of the pulse wave signal and the blood pressure value to obtain a corresponding blood pressure value, thereby estimating the blood pressure range of the user.

In the embodiment of the present application, the blood pressure measurement device can estimate the blood pressure range of the user through the pulse wave signal of the user obtained by the pulse wave sensor. This process does not require manual intervention and avoids errors caused by subjective introduction.

With reference to the first aspect, in some implementations of the first aspect, the pulse wave sensor is specifically configured to: when the airbag is not pressurized, acquire the user's first pulse wave signal, and use the The first pulse wave signal is sent to the signal processing unit; the signal processing unit is specifically configured to: estimate the blood pressure range based on the first pulse wave signal.

It should be understood that, when the airbag is not pressurized, the blood pressure measurement device can acquire the first pulse wave signal of the user through the pulse wave sensor. In this case, the signal processing unit of the blood pressure measurement device may estimate the blood pressure range of the user based on the first pulse wave signal. In this way, before the blood pressure measurement is performed, the blood pressure measurement device has already determined the blood pressure range of the user, and based on the above-mentioned first threshold value, the blood pressure measurement device can enter the rapid pressurization stage at the beginning, and the airbag can be rapidly compressed. Pressurize, reduce blood pressure measurement time, and realize rapid blood pressure measurement.

With reference to the first aspect, in some implementations of the first aspect, the signal processing unit is specifically configured to: estimate the blood pressure range based on the waveform characteristics of the first pulse wave signal.

Exemplarily, the waveform characteristics of the first pulse wave signal include amplitude, peak-to-peak time interval, main peak and echo amplitude ratio, area ratio, and the like of the first pulse wave signal. The signal processing unit of the blood pressure measuring device may estimate the blood pressure range according to at least one of the amplitude, peak-to-peak time interval, main peak and echo amplitude ratio, area ratio, etc. of the first pulse wave signal. Since these features are highly correlated with blood pressure, the blood pressure range finally estimated by the signal processing unit of the blood pressure measurement device has a high accuracy rate, thereby improving the accuracy rate of subsequent blood pressure measurement.

With reference to the first aspect, in some implementations of the first aspect, the pulse wave sensor is specifically configured to: when the signal processing unit controls the pump to pressurize the balloon at a third rate, Acquire the second pulse wave signal of the user, and send the second pulse wave signal to the signal processing unit, where the third rate is less than or equal to the second rate; the signal processing unit is specifically used for : Estimate the blood pressure range based on the second pulse wave signal.

It should be understood that the blood pressure measuring device may first control the pump through the signal processing unit to pressurize the airbag according to the third rate, and obtain the second pulse wave signal of the user through the pulse wave sensor during the pressurizing process. The third rate here is less than or equal to the second rate. In other words, the blood pressure measurement device may first perform a slow pressurization phase until the pulse wave sensor acquires enough second pulse wave signals, so that the signal processing unit can predict until the user's blood pressure range is estimated. Then, the blood pressure measuring device enters the rapid compression phase and the normal compression phase again.

With reference to the first aspect, in some implementations of the first aspect, the signal processing unit is specifically configured to: estimate the blood pressure range based on the amplitude envelope feature of the second pulse wave signal.

Exemplarily, the amplitude envelope feature of the second pulse wave signal includes the maximum value of the amplitude envelope, the falling speed, the rising speed of the envelope, and the like of the second pulse wave signal. The signal processing unit of the blood pressure measurement device may estimate the blood pressure range of the user based on at least one of the maximum value of the amplitude envelope of the second pulse wave signal, the falling speed of the envelope, the rising speed, and the like. Since these features are highly correlated with blood pressure, the blood pressure range finally estimated by the signal processing unit of the blood pressure measurement device has a high accuracy rate, thereby improving the accuracy rate of subsequent blood pressure measurement.

With reference to the first aspect, in some implementations of the first aspect, the pulse wave sensor is specifically configured to: when the airbag is not pressurized, acquire the user's first pulse wave signal, and use the The first pulse wave signal is sent to the signal processing unit; while the signal processing unit controls the pump to pressurize the air bag at a third rate, the second pulse wave signal of the user is acquired, and sending the second pulse wave signal to the signal processing unit, the third rate is less than or equal to the second rate; the signal processing unit is specifically configured to: based on the first pulse wave signal and the The second pulse wave signal estimates the blood pressure range.

It should be understood that when the airbag is not pressurized, the blood pressure measurement device can first obtain the user's first pulse wave signal through the pulse wave sensor, and then the blood pressure measurement device controls the pump through the signal processing unit to continue to perform the above airbag at a third rate. Pressurizing, in the process of pressurizing, the second pulse wave signal of the user is obtained through the pulse wave sensor, and the signal processing unit of the blood pressure measurement device can estimate the blood pressure range of the user based on the first pulse wave signal and the second pulse wave signal. , so as to determine the first threshold. Therefore, the blood pressure measurement process of this embodiment also includes a slow pressurization phase, a rapid pressurization phase, and a normal pressurization phase. Combined with the first pulse wave signal obtained when not pressurized and the second pulse wave signal obtained in the slow pressurization phase, the blood pressure range estimated by the signal processing unit is closer to the real value, improving the accuracy of blood pressure measurement.

With reference to the first aspect, in some implementations of the first aspect, the signal processing unit is specifically configured to: based on the waveform characteristics of the first pulse wave signal and the amplitude envelope characteristics of the second pulse wave signal , the estimated blood pressure range.

In conjunction with the first aspect, in some implementations of the first aspect, the above-mentioned pulse wave sensor includes at least one of the following: a photoplethysmography (PPG) sensor, a pressure sensor, or an ultrasonic sensor.

A second aspect provides a pressurizing method, which is applied to the blood pressure measuring device according to the first aspect, including: estimating a blood pressure range of the user based on the acquired pulse wave signal; based on the blood pressure range, determining a first threshold; controlling the pump to pressurize the airbag at a first rate until the pressure signal of the airbag reaches the first threshold; continuing to control the pump to pressurize the airbag at a second rate, to collect data for blood pressure measurement of the user; wherein the first rate is greater than the second rate.

With reference to the second aspect, in some implementations of the second aspect, the acquired pulse wave signal is the first pulse wave signal of the user acquired by the pulse wave sensor when the airbag is not pressurized ; estimating the blood pressure range of the user based on the acquired pulse wave signal, comprising: estimating the blood pressure range based on the first pulse wave signal.

With reference to the second aspect, in some implementations of the second aspect, estimating the blood pressure range based on the first pulse wave signal includes: estimating the blood pressure range based on waveform characteristics of the first pulse wave signal blood pressure range.

With reference to the second aspect, in some implementations of the second aspect, the acquired pulse wave signal is acquired by the pulse wave sensor while the pump pressurizes the balloon at a third rate the second pulse wave signal of the user, the third rate is less than or equal to the second rate; based on the acquired pulse wave signal, estimating the blood pressure range of the user, including: based on the second pulse wave signal to estimate the blood pressure range.

With reference to the second aspect, in some implementations of the second aspect, estimating the blood pressure range of the user based on the acquired pulse wave signal includes: based on the amplitude envelope feature of the second pulse wave signal , the estimated blood pressure range.

With reference to the second aspect, in some implementations of the second aspect, the acquired pulse wave signal includes: when the airbag is not pressurized, the acquired first pulse wave signal of the user; The second pulse wave signal of the user is acquired while the pump pressurizes the air bag according to a third rate, the third rate being less than or equal to the second rate; based on the acquired pulse wave signal , estimating the blood pressure range of the user, comprising: estimating the blood pressure range based on the first pulse wave signal and the second pulse wave signal.

With reference to the second aspect, in some implementations of the second aspect, estimating the blood pressure range based on the first pulse wave signal and the second pulse wave signal includes: based on the waveform characteristics of the first pulse wave signal and The amplitude envelope characteristic of the above-mentioned second pulse wave signal predicts the blood pressure range.

In conjunction with the second aspect, in some implementations of the second aspect, the above-mentioned pulse wave sensor includes at least one of the following: a PPG sensor, a pressure sensor, or an ultrasonic sensor.

The beneficial effects achieved by the above-mentioned pressurizing method are similar to those achieved by the above-mentioned blood pressure measuring device, which will not be repeated here.

A third aspect provides a processing device, which can correspond to the signal processing unit described in the first aspect above, and can be used to implement the function of the signal processing unit in any possible implementation manner of the second aspect above .

In one design, the signal processing unit may include a one-to-one module for performing the method/operation/step/action described in the first aspect, and the module may be a hardware circuit, software, or hardware The circuit is implemented in combination with software.

In a fourth aspect, a processing device is provided. The processing device may include a processor, and the processor may be configured to read instructions in the memory, so as to implement the signal processing unit in any possible implementation manner of the second aspect above. Function.

Optionally, there are one or more processors.

Optionally, the processing device further includes a memory that can be used to store the instructions.

Optionally, the memory is one or more

Alternatively, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

In the specific implementation process, the memory can be a non-transitory memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be separately set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting manner of the memory and the processor.

The processor in the above fourth aspect may be one or more chips. The processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor. It is implemented by reading software codes stored in a memory, which can be integrated in the processor, or located outside the processor, and exists independently.

In a fifth aspect, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, enables the computer to execute any one of the above-mentioned second aspects. method in the implementation.

In a sixth aspect, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program (also referred to as code, or instruction) when it is run on a computer, causing the computer to execute the second aspect above. method in any of the possible implementations.

Description of drawings

1 is a schematic block diagram of a blood pressure measurement device provided by an embodiment of the present application;

2 is a schematic structural diagram of a blood pressure measurement device provided by an embodiment of the present application;

3 is a schematic diagram of an exploded structure of a blood pressure measurement device provided by an embodiment of the present application;

4 is a schematic structural diagram of a dial of a blood pressure measurement device provided by an embodiment of the present application;

Fig. 5 is the exploded structure schematic diagram of the dial shown in Fig. 4;

6 is a schematic diagram of the bottom structure of the dial in the blood pressure measurement device provided by the embodiment of the present application;

7 is a schematic diagram of waveform characteristics of a first pulse wave signal provided by an embodiment of the present application;

8 is a schematic diagram of an amplitude envelope characteristic of a second pulse wave signal provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of a pressurizing method provided by an embodiment of the present application;

FIG. 10 is a schematic flow chart of another pressurizing method provided by an embodiment of the present application;

11 is a schematic diagram of a relationship between pressure and time provided by an embodiment of the present application;

FIG. 12 is a schematic flow chart of another pressurizing method provided by the embodiment of the application;

FIG. 13 is another schematic diagram of the relationship between pressure and time provided by an embodiment of the present application;

FIG. 14 is a schematic flowchart of another pressurizing method provided by an embodiment of the present application;

FIG. 15 is a schematic block diagram of a processing apparatus provided by an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

Electronic sphygmomanometer is an essential measuring instrument for patients with abnormal blood pressure. It is used to obtain daily blood pressure conditions, and adjust living habits and medication reasonably based on the guidance of doctors, so as to control abnormal blood pressure and achieve the purpose of treatment. The number of hypertensive patients is huge, and blood pressure measurement equipment is a rigid demand for hypertensive patients, so the market is huge.

Traditional electronic sphygmomanometers (for example, arm sphygmomanometers, or wrist sphygmomanometers) are all based on oscillometric methods for blood pressure measurement. Electronic sphygmomanometers are large in size and weight, and can only be used for a single indoor blood pressure measurement. , not suitable for long-term wear. In order to further reduce the volume of the electronic sphygmomanometer, achieve the purpose of thin and light design, and realize the wearable solution of the electronic sphygmomanometer, a wearable sphygmomanometer based on the oscillometric method has been designed, which is convenient for users to carry around and measure blood pressure. .

The sphygmomanometer hardware based on the oscillometric principle may include: air bag, pressure sensor, cuff (air bag), air pump, storage module, signal processing module, blood pressure display module and so on. The airbag is placed outside the main body of the sphygmomanometer, and is connected to the sensor, pump, etc. integrated in the main body of the sphygmomanometer through an air path. The basic principle of blood pressure measurement of the sphygmomanometer is as follows: the pump inflates the air bag, causing the air bag to be pressurized and inflated, compressing the radial artery of the wrist. The sensor integrated in the main body of the sphygmomanometer is connected to the air bag. During the process of inflation and boosting, the sensor will extract the pulse wave signal due to the compression of the radial artery. The signal processing module can calculate the blood pressure according to the extracted pulse wave signal. Generally speaking, the boost range covers at least the point of maximum pulse wave envelope amplitude, so that blood pressure can be accurately measured.

Compared with traditional electronic sphygmomanometers, oscillometric-based wearable blood pressure measurement devices use narrower airbags. In the process of blood pressure measurement, it needs to be inflated to a higher pressure in order to reach the maximum amplitude of the pulse wave envelope, which leads to a long measurement time in the blood pressure measurement process, the air bag will oppress the user greatly, and the user experience will be poor.

In one blood pressure measurement method, the user may measure blood pressure during the process of lowering blood pressure. First, the blood pressure measurement equipment needs to raise the air pressure in the cuff to a higher pressure, and then control the deflation valve to gradually deflate. After each deflation, the pressure was maintained for 3-4s, and the corresponding pulse wave signal was collected under the pressure. Until the collected pulse wave signals under different pressures meet the requirements of blood pressure measurement data collection, the deflation valve is controlled to completely deflate and depressurize. Finally, the blood pressure measurement device can fit the systolic, diastolic and average blood pressure according to the envelopes of the pulse wave signals obtained under different pressures. Since the blood pressure measurement device cannot predict the user's blood pressure range in advance, each blood pressure measurement will quickly increase the airbag pressure to a very high range (mostly set at about 200mmHg) to ensure that the blood pressure measurement data collection needs of hypertensive users are met. . For many users with normal blood pressure, when the air bag pressure is not within the above range, the demand for blood pressure measurement data collection has been met, so there is no need to increase the pressure to such a high range. Therefore, since the above method needs to pressurize the airbag to a high range first, it will bring a strong sense of pressure to the user, and the measurement time is long, and the user experience is not good.

In another blood pressure measurement method, the user may measure blood pressure during compression. The blood pressure measurement device controls the inflation power of the pump, so that the pressure in the sphygmomanometer cuff can be increased linearly according to the preset slope. The blood pressure measurement device collects pulse wave signals at different pressures until the collected data meets the blood pressure measurement data collection requirements. Then control the deflation valve to deflate. Finally, the blood pressure measurement device fits the systolic, diastolic, and average blood pressures according to the envelopes of the pulse wave signals obtained under different pressures. In the above method, in order to ensure the accuracy of blood pressure measurement, the process of pressurization needs to be kept at a relatively slow rate, generally 3-5 mmHg/s. If this compression rate is maintained throughout the measurement period, the time required for blood pressure measurement is longer, that is, the user is under pressure for a longer time, and the user experience is not good.

In view of this, the embodiment of the present application provides a new blood pressure measurement device and a pressurizing method thereof, obtaining a pulse wave signal through a pulse wave sensor, estimating the user's blood pressure range, and then determining the first blood pressure according to the estimated user's blood pressure range. Threshold, quickly pressurize the airbag to the first threshold, and then reduce the speed of pressure increase, normalize the airbag pressure and collect user data, reduce blood pressure measurement time, realize rapid blood pressure measurement, and improve user experience.

Before introducing the apparatus and method provided by the embodiments of the present application, the following points are made.

First, in the embodiments shown below, terms and abbreviations, such as the first pulse wave signal, the second pulse wave signal, the first threshold, etc., are all illustrative examples given for convenience of description, not No limitation of this application shall be constituted. This application does not exclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

Second, in the embodiments shown below, the first, the second, and various numeral numbers are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. For example, differentiating different compression rates, differentiating different pulse wave signals, etc.

Third, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b and c may represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, wherein a, b, c can be single or multiple.

In order to make the purpose and technical solution of the present application clearer and more intuitive, the blood pressure measurement device and the pressurizing method thereof provided by the present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

The apparatus and method of the embodiments of the present application are applicable to various wearable devices including pulse wave sensors, for example, watches, wristbands, etc. integrated with pulse wave sensors, which are not limited in the embodiments of the present application. For convenience of description, the blood pressure measurement device of the present application will be described below by taking a blood pressure measurement watch as an example.

FIG. 1 is a schematic block diagram of a blood pressure measurement apparatus 1000 provided by an embodiment of the present application. As shown in FIG. 1 , the blood pressure measurement device 1000 includes an air bag 1001 , a pump 1002 , a pulse wave sensor 1003 , an air pressure sensor 1004 and a signal processing unit 1005 . The air pressure sensor 1004 , the pulse wave sensor 1003 and the pump 1002 are respectively connected to the signal processing unit 1005 , and the pump 1002 is connected to the air bag 1001 . The signal processing unit 1005 may be a micro control unit (micro controller unit, MCU) or other unit having a function of processing signals, which is not limited in this embodiment of the present application. The blood pressure measuring device 1000 can be worn by the user and apply pressure to the user through the air bag 1001 .

The pulse wave sensor 1003 is used to measure the user's pulse wave signal and send the pulse wave signal to the signal processing unit 1005; the air pressure sensor 1004 is used to detect the pressure of the airbag 1001 during the process of inflating or deflating the pump 1002 signal, and transmit the pressure signal to the signal processing unit 1005; the signal processing unit 1005 is used for receiving the pulse wave signal and the pressure signal to measure the blood pressure.

Optionally, the above-mentioned blood pressure measurement device 1000 may further include: a display 1006, a storage module 1007, an interactive hardware 1008, a wireless module 1009, a pump driving circuit 1010, an active front end (AFE) 1011, an AFE 1012, and a battery 1013. The battery 1013 can power other circuit components other than the airbag 1001 .

The user can perform operations such as touch and press on the blood pressure measurement device 1000 through the above-mentioned interactive hardware 1008 , and then issue a blood pressure measurement instruction to realize the interaction between the user and the blood pressure measurement device 1000 . During blood pressure measurement, the pulse wave sensor 1003 acquires the user's pulse wave signal, and sends the pulse wave signal to the signal processing unit 1005 through the AFE 1011 for processing. The signal processing unit 1005 can control the pump 1002 to pressurize the air bag 1001 through the pump driving circuit 1010, and the air pressure sensor 1004 can detect the pressure signal inside the air bag 1001, and send the pressure signal to the signal processing unit 1005 through the AFE 1012. The signal processing unit 1005 can perform data processing on the received pressure signal, and then obtain the blood pressure data measured this time, and then store the blood pressure data in the storage module 1007, and can also display the processed blood pressure measurement results through the display 1006. . The blood pressure measurement apparatus 1000 can also upload the user's blood pressure data or blood pressure measurement results to a cloud server or send it to other devices through the wireless module 1009 .

FIG. 2 shows a schematic diagram of the physical structure of the blood pressure measurement apparatus 1000 according to the embodiment of the present application, and FIG. 3 shows a schematic diagram of the exploded structure of the blood pressure measurement apparatus 1000 according to the embodiment of the present application. For ease of description, the width direction of the blood pressure measurement device 1000 is defined as the X direction, the length direction of the blood pressure measurement device 1000 is defined as the Y direction, the thickness direction of the blood pressure measurement device 1000 is defined as the Z direction, and the X direction, the Y direction and the Z direction are paired with each other vertical.

As shown in FIGS. 2 and 3 , the blood pressure measuring device 1000 includes a dial 2001 , a compression band 2002 and a watch band 2003 . The airbag 1001 shown in FIG. 1 is located inside the compression belt 2002 , the pump 1002 , the air pressure sensor 1004 and the signal processing unit 1005 shown in FIG. 1 are located inside the dial 2001 , and the pulse wave sensor 1003 is located at the bottom of the dial 2001 .

In the embodiment of the present application, there are two watch straps 2003, the two watch straps 2003 are the first watch strap 2003 and the second watch strap 2003 respectively, and the first watch strap 2003 and the second watch strap 2003 are respectively connected to the dial 2001 opposite sides. The first watchband 2003 is provided with a first locking portion (not shown), the second watchband 2003 is provided with a second locking portion (not shown), the first locking portion and the second locking portion are detachable Lock each other to wear the smart watch 2000 on the user's wrist. It should be understood that the matching structure between the first locking portion and the second locking portion may be a buckle structure such as a hook buckle, a concealed buckle, a butterfly buckle, a belt snap button, a folding safety buckle, a folding buckle or a pin buckle, etc. This application does not specifically limit this. The compression band 2002 and the watch band 2003 are stacked. Specifically, the compression band 2002 and the first watch band 2003 are stacked and located at the bottom of the watch band 2003 . When the blood pressure measuring device 1000 is worn by the user, the compression band 2002 is located on one side of the watch band 2003 and the user's wrist, and fits with the wrist artery of the user's wrist. It should be noted that the orientation terms such as "top" and "bottom" used by the blood pressure measuring device 1000 shown in the embodiments of the present application are mainly used to describe equipment, and do not form the orientation of the blood pressure measuring device 1000 in practical application scenarios. limit.

Specifically, the compression band 2002 includes a cuff 2004 , an air bag 1001 (not shown) accommodated in the cuff 2004 , and a valve 2005 communicating with the air bag 1001 . The airbag 1001 is located at the position of the cuff 2004 near the dial 2001 . The valve 2005 protrudes from the top surface of the cuff 2004 . The air nozzle 2005 extends from the top surface of the cuff 2004 in a direction away from the bottom surface, that is, the air nozzle 2005 extends along the Z direction.

FIG. 4 shows a schematic structural diagram of the dial 2001 in the blood pressure measuring device 1000 . As shown in FIG. 4 , the dial 2001 has a substantially rectangular parallelepiped structure. The dial 2001 further includes a top cover 2011, a bottom cover 2012, a pump 1002 (not shown), a pulse wave sensor 1003 (not shown), an air pressure sensor 1004 (not shown) and a signal processing unit 1005 (not shown). The bottom cover 2012 and the top cover 2011 are located on opposite sides of the frame 2013 , and the pump 1002 , the pulse wave sensor 1003 , the air pressure sensor 1004 and the signal processing unit 1005 are located between the top cover 2011 and the bottom cover 2012 .

It should be understood that, the dial 2001 may also be substantially cylindrical, truncated cone, cube or other special-shaped structures, which are not limited in this embodiment of the present application.

FIG. 5 is a schematic diagram of an exploded structure of the dial 2001 shown in FIG. 4 . As shown in FIG. 5 , the pump 1002 , the air pressure sensor 1004 and the signal processing unit 1005 (not shown) are located in the inner cavity of the dial 2001 . The pump 1002 is electrically connected to the signal processing unit 1005 for receiving a control signal sent by the signal processing unit 1005, and extracting gas or discharging gas according to the control signal. The air pressure sensor 1004 is spaced apart from the pump 1002 and electrically connected to the signal processing unit 1005 for receiving the control signal sent by the signal processing unit 1005, and sensing the pressure signal according to the control signal, and converting the pressure signal into an electrical signal.

2 to 5, the compression band 2002 is connected to the dial 2001, the first inset interface, the second inset interface, the first fluid channel, the second fluid channel, the first extrapolation interface and the second extrapolation interface (Fig. not shown) are integrated in the bottom cover 2012 of the dial 2001. The first extrapolation interface, the first fluid channel and the first interpolated interface are communicated in sequence, and the second extrapolated interface, the second fluid channel and the second interpolated interface are communicated in sequence.

Specifically, as shown in FIG. 3 , the compression belt 2002 includes two air nozzles 2005 . On the one hand, a gas nozzle 2005 of the compression belt 2002 communicates with the first external insertion interface, and the gas nozzle of the pump 1002 communicates with the first internal insertion interface. The communication between the compression belt 2002 and the pump 1002 is achieved through an air nozzle 2005 of the compression belt 2002 , the first external insertion interface, the first fluid channel, the first inner insertion interface and the air nozzle of the pump 1002 in sequence. On the other hand, the other air nozzle 2005 of the compression belt 2002 communicates with the second external insertion interface, and the air nozzle of the air pressure sensor 1004 communicates with the second internal insertion interface. The communication between the compression belt 2002 and the air pressure sensor 1004 is achieved through the other air nozzle 2005 of the compression belt 2002 , the second external insertion interface, the second fluid channel, the second inner insertion interface and the air nozzle of the air pressure sensor 1004 in sequence.

When the blood pressure measuring device 1000 needs to measure blood pressure, the pump 1002 can send the outside air extracted through the vent hole into the air bag 1001 of the compression belt 2002 through the first fluid channel and the air nozzle 2005 of the compression belt 2002, so as to realize the operation of the compression belt. 2002 Inflation of airbag 1001. After the blood pressure measurement by the blood pressure measuring device 1000 is completed, the air in the air bag 1001 of the compression belt 2002 can be sent into the pump 1002 through the air nozzle 2005 of the compression belt 2002 and the first fluid channel, and the pump 1002 can discharge the air through the vent hole. In addition, the gas in the airbag 1001 of the compression belt 2002 is fed into the air pressure sensor 1004 through the air nozzle 2005 of the compression belt 2002 and the second fluid channel, so that the air pressure sensor 1004 senses the air pressure change in the airbag 1001 of the compression belt 2002 to realize blood pressure measurement.

It should be understood that the connection relationship between the compression belt 2002, the pump 1002 and the air pressure sensor 1004 is only an example. The air pressure sensor 1004 is arranged between the compression belt 2002 and the pump 1002. The air pressure sensor 1004 obtains the air pressure change of the air bag 1001 in the compression belt 2002 through the first fluid channel between the compression belt 2002 and the pump 1002. The position of 1004 is not limited.

FIG. 6 shows a schematic structural diagram of the bottom cover 2012 in the blood pressure measuring device 1000 . The pulse wave sensor 1003 shown in FIG. 1 may be integrated on the bottom cover 2012 of the blood pressure measuring device 1000 . In this embodiment of the present application, the pulse wave sensor 1003 may be a photoplethysmography (photoplethysmography, PPG) sensor, a pressure sensor, an ultrasonic sensor, or the like.

Exemplarily, the above-mentioned pulse wave sensor 1003 is a PPG sensor. When the blood pressure measuring device 1000 is worn by the user, the PPG sensor can send a heart rate sensing signal through the installation hole to realize the detection of the pulse wave signal.

It should be understood that the pulse wave sensor 1003 may include but is not limited to the sensors listed above, and each sensor may be used independently or in combination to obtain a pulse wave signal. For the specific implementation, please refer to the description of the related prior art , and will not be repeated here.

In addition, the above-mentioned blood pressure measurement device 1000 may further include a gyro sensor, an air pressure sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor or an ambient light sensor, etc., to further improve the functional diversity of the blood pressure measurement device 1000. Improve user experience.

The components in the above-mentioned blood pressure measurement device 1000 will be described in detail below.

1. Pulse wave sensor 1003 : used to measure the pulse wave signal on the skin surface of the user's body part, and send the pulse wave signal to the signal processing unit 1005 .

Exemplarily, the pulse wave sensor 1003 is a PPG sensor, used to collect PPG signals, the light of a specific frequency emitted by the PPG sensor penetrates the skin surface of the user's body part, and is reflected or scattered back after hitting the blood vessel, and the PPG sensor receives the returned light. PPG signal, and then transmit the PPG signal to the signal processing unit 1005, the transmitted PPG signal can reflect the change of the photo volume in the user's blood vessel, and the change of the photo volume can reflect the blood pressure change in the blood vessel to a certain extent, so PPG The signal can be used to measure blood pressure.

2. Pump 1002 and air pressure sensor 1004: The pump 1002 is used to inflate or deflate the air bag 1001, and the air pressure sensor 1004 is used to detect the pressure signal of the air bag 1001 during the process of inflation or deflation of the pump 1002, and to The pressure signal is transmitted to the signal processing unit 1005 . Pressure signals can represent changes in blood pressure within blood vessels.

When the user wears the blood pressure measuring device 1000 to start blood pressure measurement, when the pump 1002 inflates the air bag 1001, the air bag 1001 compresses the blood vessels in the user's body part, blocking the blood flow in the blood vessels, and then the pump 1002 deflates the air bag 1001 to the blood vessels in the blood vessels. blood flow again. During this process, the vibration change caused by the blood can reflect the blood pressure change in the blood vessel, so the pressure signal of the air bag 1001 detected by the air pressure sensor 1004 can be used to measure the blood pressure.

3. The signal processing unit 1005: for receiving the pulse wave signal and receiving the pressure signal; estimating the blood pressure range of the user based on the above pulse wave signal, and determining the first threshold based on the blood pressure range; controlling the pump 1002 according to the first rate Pressurize the airbag 1001 until the pressure signal of the airbag 1001 reaches the above-mentioned first threshold; then continue to control the pump 1002 to pressurize the airbag 1001 at the second rate, and control the air pressure sensor 1004 to pressurize the airbag 1001 at the second rate at the pump 1002 The data for blood pressure measurement of the user is collected during the compression process, wherein the first rate is greater than the second rate.

It should be understood that there is a correlation between the pulse wave signal and the user's blood pressure. Exemplarily, the signal processing unit 1005 may perform weighted summation on each feature of the pulse wave signal through a linear model between each feature of the pulse wave signal and the blood pressure value to obtain a corresponding blood pressure value, thereby estimating the blood pressure range of the user. Therefore, before the balloon 1001 is pressurized, the signal processing unit 1005 can collect the pulse wave signal for a period of time (for example, 4s) through the pulse wave sensor 1003, and the period of time can be a preset period of time.

The range above the above-mentioned first threshold is an effective pressure section in the blood pressure measurement process based on the oscillometric method, that is, the signal processing unit 1005 can collect valid data within this range; the range below the first threshold is based on the oscillometric method. Invalid pressurization section in the blood pressure measurement process, that is, the signal processing unit 1005 does not need to collect data within this range, or in other words, the data collected by the signal processing unit 1005 within this range is invalid.

Optionally, in order to ensure that the range above the first threshold can include an effective pressure segment for actual blood pressure measurement, the signal processing unit 1005 can expand the estimated range of the user's blood pressure to determine the first threshold. Exemplarily, assuming that the blood pressure range of the user estimated by the signal processing unit 1005 is 105-135 mmHg, the signal processing unit 1005 can first expand the range to 75-165 mmHg, and then determine the lower limit of the range, 75 mmHg, as the above-mentioned No. a threshold. It should be understood that the expanded scope here is obtained based on analysis of existing historical data, but this expanded scope is not limited in the embodiments of the present application.

It should also be understood that the above-mentioned first rate is greater than the above-mentioned second rate. Exemplarily, the second rate may be an oscillometric-based linear boost rate, typically 3-5 mmHg/s. Exemplarily, the first rate may be a rate corresponding to the maximum suitable power of the blood pressure measuring device 1000, and the maximum suitable power may refer to the maximum power used to drive the pump to restart quickly without affecting the overall operation of the blood pressure measuring device 1000. . Therefore, the pressurization process corresponding to the first rate may also be referred to as a rapid pressurization stage or a rapid pressurization stage, and the pressurization process corresponding to the second rate may also be referred to as a normal pressurization stage or a normal pressurization stage. The example does not limit this.

In the embodiment of the present application, the blood pressure measurement device can obtain the pulse wave signal of the user through the pulse wave sensor, and estimate the blood pressure range of the user according to the pulse wave signal through the signal processing unit, and determine the first threshold based on the blood pressure range to The first threshold is a dividing line, and the blood pressure measuring device can firstly pressurize the air bag quickly through the pump, and then use the pump to pressurize the air bag normally. In the normal pressurization stage, the blood pressure measurement device can collect user data through the signal processing unit to measure the blood pressure.

Therefore, the blood pressure measurement device of the embodiment of the present application can make the pressurization process more intelligent, can reduce the compression time of the airbag on the user, shorten the blood pressure measurement time of the user, realize rapid blood pressure measurement, and improve user experience. In addition, since the blood pressure measurement time is shortened, the inflation time of the airbag will be reduced, which can reduce the power consumption of the blood pressure measurement device, and is beneficial to improve the battery life of the whole machine.

Three possible implementations of the blood pressure measurement device 1000 of the present application are described below.

It should be understood that in this application, the user's pulse wave signal obtained by the pulse wave sensor when the airbag is not pressurized is called the first pulse wave signal, and the user's pulse wave signal obtained by the pulse wave sensor during the initial pressurization of the airbag is called the first pulse wave signal. is the second pulse wave signal, which will not be repeated hereafter.

In a first possible implementation manner, before measuring the blood pressure, the pulse wave sensor 1003 first measures the user's pulse wave, obtains a first pulse wave signal, and sends it to the signal processing unit 1005 . The signal processing unit 1005 determines the above-mentioned first threshold based on the obtained first pulse wave signal. When the signal processing unit 1005 receives the blood pressure measurement instruction, the pump 1002 is controlled to pressurize the air bag 1001 at the first rate. During the pressurization process, the air pressure sensor 1004 detects the pressure signal in the airbag 1001 and sends it to the signal processing unit 1005 . The signal processing unit 1005 judges according to the obtained pressure signal in the process of pressurization, and if the pressure signal reaches the first threshold, then controls the pump 1002 to pressurize the air bag 1001 at the second rate, and simultaneously collects the data of the user for blood pressure measurement .

In this way, before the blood pressure measurement is performed, the blood pressure measurement device has already determined the blood pressure range of the user, and based on the above-mentioned first threshold value, the blood pressure measurement device can enter the rapid pressurization stage at the beginning, and the airbag can be rapidly compressed. Pressurize, reduce blood pressure measurement time, and realize rapid blood pressure measurement.

In a second possible implementation manner, when the signal processing unit 1005 receives the blood pressure measurement instruction, the signal processing unit 1005 first controls the pump 1002 to pressurize the air bag 1001 at a third rate. During the initial pressurization process, the pulse wave sensor 1003 measures the user's pulse wave, obtains a second pulse wave signal, and sends it to the signal processing unit 1005 . The signal processing unit 1005 determines the above-mentioned first threshold based on the obtained second pulse wave signal. Then, the signal processing unit 1005 controls the pump 1002 to pressurize the airbag 1001 at the first rate. In the process of rapid pressurization, the air pressure sensor 1004 detects the pressure signal in the airbag 1001 and sends it to the signal processing unit 1005 . The signal processing unit 1005 judges according to the obtained pressure signal in the process of rapid pressurization. If the pressure signal reaches the first threshold, the pump 1002 is controlled to pressurize the air bag 1001 normally according to the second rate, and at the same time, the user's blood pressure measurement is collected. The data.

The above-mentioned third rate is less than or equal to the second rate. In other words, the blood pressure measurement device 1000 may first perform a period of slow pressurization until the pulse wave sensor 1003 obtains enough second pulse wave signals, so that the signal processing unit 1005 Until the user's blood pressure range can be estimated. Then, the blood pressure measuring device 1000 enters the rapid compression stage and the normal compression stage again. The upper limit of the air pressure in the slow pressurization stage may also be a preset value, for example, 40 mmHg, which is not limited in the embodiment of the present application. Optionally, the blood pressure measurement apparatus 1000 may acquire the second pulse wave signal for multiple times during the above-mentioned slow pressurization process, and estimate the blood pressure range of the user based on the second pulse wave signal.

In a third possible implementation manner, before measuring the blood pressure, the pulse wave sensor 1003 first measures the user's pulse wave, obtains a first pulse wave signal, and sends it to the signal processing unit 1005 . When the signal processing unit 1005 receives the blood pressure measurement instruction, the signal processing unit 1005 firstly controls the pump 1002 to pressurize the air bag 1001 according to the third rate. During the initial pressurization process, the pulse wave sensor 1003 measures the user's pulse wave, obtains a second pulse wave signal, and sends it to the signal processing unit 1005 . The signal processing unit 1005 determines the above-mentioned first threshold based on the obtained first pulse wave signal and second pulse wave signal. Then, the signal processing unit 1005 controls the pump 1002 to pressurize the airbag 1001 at the first rate. In the process of rapid pressurization, the air pressure sensor 1004 detects the pressure signal in the airbag 1001 and sends it to the signal processing unit 1005 . The signal processing unit 1005 judges according to the obtained pressure signal in the process of rapid pressurization. If the pressure signal reaches the first threshold, the pump 1002 is controlled to pressurize the air bag 1001 normally according to the second rate, and at the same time, the user's blood pressure measurement is collected. The data.

Therefore, the blood pressure measurement device of this embodiment can determine the blood pressure range of the user in combination with the first pulse wave signal obtained when no pressure is applied and the second pulse wave signal obtained during the slow pressure phase (or called the initial pressure phase). , so that the blood pressure measurement process includes a slow pressurization phase, a rapid pressurization phase and a normal pressurization phase, so that the estimated blood pressure range is closer to the real value, and the accuracy of blood pressure measurement is improved.

Optionally, in the above-mentioned first possible implementation manner, the signal processing unit 1005 may estimate the blood pressure range of the user based on the waveform characteristics of the first pulse wave signal. The waveform characteristic of the first pulse wave signal may be at least one of the amplitude, peak-to-peak time interval, main peak and echo amplitude ratio, area ratio, and the like of the first pulse wave signal. Exemplarily, the signal processing unit 1005 can obtain the blood pressure ranges corresponding to the above-mentioned multiple waveform features of the first pulse wave signal through a plurality of machine learning models, and then perform weighted summation on the blood pressure ranges corresponding to the multiple waveform features to obtain a pre-set value. Estimated user blood pressure range. The above-mentioned multiple machine learning models may be obtained by training some historical user data, and one machine learning model corresponds to one type of waveform feature. FIG. 7 shows a schematic diagram of the waveform characteristics of the first pulse wave signal. In FIG. 7 , the waveform characteristics of the first pulse wave signal are the main peak amplitude, the dipulsive wave amplitude, and the peak-to-peak time interval.

Optionally, in the above-mentioned second possible implementation manner, the signal processing unit 1005 may estimate the blood pressure range based on the amplitude envelope feature of the second pulse wave signal. Wherein, the amplitude envelope feature of the second pulse wave signal may be at least one of the maximum value of the amplitude envelope, the falling speed of the envelope, the rising speed, and the like. Exemplarily, the blood pressure measurement device can also obtain the blood pressure ranges corresponding to the multiple amplitude envelope features of the second pulse wave signal through a plurality of machine learning models, and then perform the measurement on the blood pressure ranges corresponding to the multiple amplitude envelope features. Weighted summation yields the estimated user blood pressure range. The above-mentioned multiple machine learning models may be obtained by training some user historical data, and one machine learning model corresponds to a type of amplitude envelope feature. FIG. 8 shows a schematic diagram of the amplitude envelope characteristic of the second pulse wave signal. In FIG. 8 , the amplitude envelope characteristic of the second pulse wave signal is the maximum value P ₁ of the amplitude envelope.

Optionally, in the above third possible implementation manner, the signal processing unit 1005 may estimate the user's blood pressure range based on the waveform characteristics of the first pulse wave signal and the amplitude envelope characteristics of the second pulse wave signal. The waveform characteristics of the first pulse wave signal and the amplitude envelope characteristics of the second pulse wave signal are as described above, and will not be repeated here.

The pressurizing method of the embodiment of the present application will be described below with reference to FIGS. 9 to 14 .

FIG. 9 is a schematic flowchart of a pressurizing method 900 in an embodiment of the present application. The method 900 may be performed by the aforementioned blood pressure measurement devices shown in FIGS. 1 to 6 . As shown in Figure 9, the method 900 may include the following steps:

S901, a pulse wave sensor acquires a user's pulse wave signal, and sends the pulse wave signal to a signal processing unit.

S902, the air pressure sensor is used to acquire a gas pressure signal inside the airbag, and send the pressure signal to a signal processing unit.

S903, the signal processing unit estimates the blood pressure range of the user based on the pulse wave signal, and determines a first threshold based on the blood pressure range; controls the pump to pressurize the air bag at a first rate until the the pressure signal of the air bag reaches the first threshold; continue to control the pump to pressurize the air bag at a second rate to collect data of the user for blood pressure measurement; wherein the first rate is greater than the the second rate.

In a possible implementation manner, the above-mentioned pulse wave sensor includes at least one of the following: a PPG sensor, a pressure sensor or an ultrasonic sensor.

As an optional embodiment, the pulse wave sensor acquires a user's pulse wave signal, and sends the pulse wave signal to a signal processing unit, including: when the air bag is not pressurized, the pulse wave sensor Acquire the first pulse wave signal of the user, and send the first pulse wave signal to the signal processing unit; the signal processing unit estimates the blood pressure range of the user based on the pulse wave signal, including : The signal processing unit estimates the blood pressure range based on the first pulse wave signal.

As an optional embodiment, the signal processing unit predicting the blood pressure range based on the first pulse wave signal includes: the signal processing unit predicting the blood pressure range based on the waveform characteristics of the first pulse wave signal the blood pressure range.

As an optional embodiment, the pulse wave sensor acquires a user's pulse wave signal, and sends the pulse wave signal to a signal processing unit, including: the pulse wave sensor controls the pump in the signal processing unit According to a third rate, the second pulse wave signal of the user is acquired while the airbag is pressurized, and the second pulse wave signal is sent to the signal processing unit, and the third rate is less than or is equal to the second rate; the signal processing unit estimates the blood pressure range of the user based on the pulse wave signal, including: the signal processing unit estimates the blood pressure range based on the second pulse wave signal .

As an optional embodiment, the signal processing unit estimates the blood pressure range of the user based on the pulse wave signal, including: the signal processing unit is based on the amplitude envelope feature of the second pulse wave signal , the estimated blood pressure range.

As an optional embodiment, the pulse wave sensor acquires the pulse wave signal of the user, and sends the pulse wave signal to the signal processing unit, including: acquiring the user's pulse wave signal when the airbag is not pressurized the first pulse wave signal, and send the first pulse wave signal to the signal processing unit; while the signal processing unit controls the pump to pressurize the air bag at a third rate, obtain the the second pulse wave signal of the user, and send the second pulse wave signal to the signal processing unit, the third rate is less than or equal to the second rate; the signal processing unit is based on the pulse wave The signal for estimating the blood pressure range of the user includes: the signal processing unit estimating the blood pressure range based on the first pulse wave signal and the second pulse wave signal.

As an optional embodiment, the signal processing unit estimates the blood pressure range based on the first pulse wave signal and the second pulse wave signal, including: the signal processing unit is based on the waveform of the first pulse wave signal The characteristics and the amplitude envelope characteristics of the second pulse wave signal are used to estimate the blood pressure range.

For details of the above-mentioned pressurizing method 900, reference may be made to the corresponding description of the above-mentioned blood pressure measuring device 1000, and details are not repeated here.

FIG. 10 shows a schematic flowchart of a pressurizing method 10 according to an embodiment of the present application. The method 10 can be performed by the above-mentioned blood pressure measurement device 1000, and includes the following steps:

S101, when the airbag is not pressurized, the pulse wave sensor acquires the first pulse wave signal of the user, and sends the first pulse wave signal to the signal processing unit.

S102, the signal processing unit estimates the blood pressure range of the user based on the waveform characteristics of the first pulse wave signal.

S103, the signal processing unit determines a first threshold value according to the blood pressure range.

S104, the signal processing unit controls the pump to pressurize the airbag according to the first rate.

S105 , during the pressurization process, the air pressure sensor acquires a gas pressure signal inside the airbag, and sends the pressure signal to the signal processing unit.

S106, the signal processing unit determines whether the air pressure of the airbag reaches a first threshold according to the pressure signal.

S107 , if the air pressure of the airbag reaches the first threshold, the signal processing unit controls the pump to continue to pressurize the airbag at the second rate, and collects the data used by the user for blood pressure measurement in the process. If the air pressure of the airbag does not reach the first threshold, continue to execute S104.

S108 , the signal processing unit determines, based on the collected data of the user for blood pressure measurement, whether the data meets the blood pressure calculation requirement.

S109 , if the collected data has satisfied the blood pressure calculation requirements, the signal processing unit controls the pump to deflate the airbag, and ends the current measurement. If the collected data cannot meet the blood pressure calculation requirements, continue to execute S107 until the collected data meet the blood pressure calculation requirements.

In this application, satisfying the blood pressure calculation requirement may mean that the pressure of the airbag has exceeded the maximum blood pressure of the user, that is, enough data has been collected. In a possible implementation, when the signal processing unit determines that the pressure of the airbag has exceeded the upper limit of the blood pressure range based on the estimated blood pressure range of the user in S102, it can be considered that the collected data has met the blood pressure calculation requirements. In other possible implementation manners, the signal processing unit may also determine whether the pressure of the airbag has exceeded the maximum blood pressure of the user based on some other algorithm, which is not limited in this embodiment of the present application. No further description will be given later.

FIG. 11 shows the relationship between pressure and time in the pressurization process of the embodiment of the present application. Before pressurization, the signal processing unit has obtained the first pulse wave signal of the user through the pulse wave sensor, and according to the waveform characteristics of the first pulse wave signal, the blood pressure range of the user is estimated, and the first threshold is determined. Based on the first threshold, the signal processing unit may control the pump to rapidly pressurize the airbag, ie, pressurize at the first rate shown in FIG. 11 , until the air pressure of the airbag reaches the above-mentioned first threshold. Then, the signal processing unit controls the pump to continue to pressurize the air bag at the normal pressurizing rate for blood pressure measurement (ie, the second rate shown in FIG. 11 ), and collects the data for blood pressure measurement by the user during the pressurizing process until The collected data meets the needs of blood pressure calculation. As shown in FIG. 11 , the pressurization method of the embodiment of the present application can collect enough user data at time _t1 to end blood pressure measurement, while the traditional linear pressurization method can end blood pressure measurement at time _t2 .

It is worth noting that the pressurization method in Figure 10 may not achieve the ideal linear effect in all stages, especially in the pressurization section just started, such as the air pressure section that is usually less than 30mmHg, because the pump is just started, usually Ideal linear compression is not required or difficult to achieve.

In this embodiment of the present application, the pulse wave sensor is used to estimate the blood pressure range of the user before pressurization, and an effective pressurization threshold (ie, the first threshold) can be determined according to the estimated blood pressure range, so that the blood pressure measurement device is in the process of pressurization. The first threshold can be used as the dividing line, and the air bag is rapidly pressurized by the pump, and then the air bag is pressurized normally by the pump, so that the blood pressure measurement time is shortened, the pressure on the user is reduced, and the user experience is improved.

FIG. 12 shows a schematic flowchart of another pressurizing method 20 according to an embodiment of the present application. The method 20 can be performed by the above-mentioned blood pressure measuring device 1000, and includes the following steps:

S201, the signal processing unit controls the pump to pressurize the airbag at a third rate.

S202, during the pressurization process, the pulse wave sensor acquires the second pulse wave signal of the user, and sends the second pulse wave signal to the signal processing unit.

S203, the signal processing unit estimates the blood pressure range of the user according to the amplitude envelope characteristic of the second pulse wave signal.

S204, the signal processing unit determines a first threshold value according to the blood pressure range.

S205, the signal processing unit controls the pump to pressurize the airbag according to the first rate.

S206 , during the pressurization process, the air pressure sensor acquires a gas pressure signal inside the airbag, and sends the pressure signal to the signal processing unit.

S207, the signal processing unit determines whether the air pressure of the airbag reaches a first threshold according to the pressure signal.

S208 , if the air pressure of the airbag reaches the first threshold, the signal processing unit controls the pump to continue to pressurize the airbag at the second rate, and collects the data used by the user for blood pressure measurement in the process. If the air pressure of the airbag does not reach the first threshold, continue to execute S205.

S209, the signal processing unit determines, based on the collected data of the user for blood pressure measurement, whether the data meets the blood pressure calculation requirement.

S210 , if the collected data has satisfied the blood pressure calculation requirements, the signal processing unit controls the pump to deflate the air bag, and ends the current measurement. If the collected data cannot meet the blood pressure calculation requirements, continue to execute S208 until the collected data meet the blood pressure calculation requirements.

FIG. 13 shows the relationship between pressure and time during the pressurization process of the embodiment of the present application. The blood pressure measuring device can pressurize the balloon at the third rate shown in FIG. 13 through the pump, and at the same time of the pressurization, obtain the second pulse wave signal of the user through the pulse wave sensor, and use the second pulse wave signal according to the second pulse wave signal. The amplitude envelope feature is used to estimate the blood pressure range of the user, and then determine the first threshold. After the first threshold is determined, the blood pressure measuring device can control the pump to rapidly pressurize the airbag, that is, pressurize at the first rate shown in FIG. 13 , until the air pressure of the airbag reaches the above-mentioned first threshold. Then, the blood pressure measuring device controls the pump to continue to pressurize the air bag at the normal pressurizing rate for blood pressure measurement (ie, the second rate shown in FIG. 13 ), and collects the data used for blood pressure measurement by the user during the pressurizing process, until The collected data meets the needs of blood pressure calculation. The above-mentioned third rate is less than or equal to the second rate. As shown in FIG. 13, before the pressure reaches the first threshold, the pressurization process can be divided into two stages, a slow pressurization stage and a rapid pressurization stage. The upper limit of the air pressure in the slow pressurization stage can be a preset value, For example, 40mmHg, if the air pressure reaches this value, the blood pressure measurement device will enter the rapid pressurization stage. After the pressure reaches the first threshold, the blood pressure measuring device enters the normal pressurization phase. Therefore, the compression method of the embodiment of the present application can collect enough user data at time _t1 to end blood pressure measurement, while the traditional linear compression method can end blood pressure measurement at time _t2 .

It is worth noting that the pressurization method in Figure 12 may not achieve the ideal linear effect in all stages, especially in the pressurization section just started, such as the air pressure section that is usually less than 30mmHg, because the pump is just started, usually Ideal linear compression is not required or difficult to achieve.

In the embodiment of the present application, in the early stage of pressurization, a pulse wave sensor is used to estimate the blood pressure range of the user, and an effective pressurization threshold (ie, the first threshold) is determined according to the estimated blood pressure range, so that the blood pressure measurement device is in the process of pressurization. The first threshold can be used as the dividing line, and the air bag is rapidly pressurized by the pump, and then the air bag is pressurized normally by the pump, so that the blood pressure measurement time is shortened, the pressure on the user is reduced, and the user experience is improved.

FIG. 14 shows a schematic flowchart of still another pressurizing method 30 according to an embodiment of the present application. The method 30 can be performed by the above-mentioned blood pressure measuring device 1000, and includes the following steps:

S301, when the airbag is not pressurized, the pulse wave sensor acquires the first pulse wave signal of the user, and sends the first pulse wave signal to the signal processing unit.

S302, the signal processing unit controls the pump to pressurize the airbag at a third rate.

S303 , during the pressurization process, the pulse wave sensor acquires the second pulse wave signal of the user, and sends the second pulse wave signal to the signal processing unit.

S304: The signal processing unit estimates the blood pressure range of the user according to the waveform characteristics of the first pulse wave signal and the amplitude envelope characteristics of the second pulse wave signal.

S305, the signal processing unit determines a first threshold value according to the blood pressure range.

S306, the signal processing unit controls the pump to pressurize the airbag according to the first rate.

S307 , during the pressurization process, the air pressure sensor acquires a gas pressure signal inside the airbag, and sends the pressure signal to the signal processing unit.

S308, the signal processing unit determines whether the air pressure of the airbag reaches a first threshold according to the pressure signal.

S309 , if the air pressure of the air bag reaches the first threshold, the signal processing unit controls the pump to continue to pressurize the air bag according to the second rate, and collects the data used by the user for blood pressure measurement in the process. If the air pressure of the airbag does not reach the first threshold, continue to execute S806.

S310, the signal processing unit determines, based on the collected data of the user for blood pressure measurement, whether the data meets the blood pressure calculation requirement.

S311, if the collected data has met the blood pressure calculation requirements, the signal processing unit controls the pump to deflate the airbag, and ends the current measurement. If the collected data cannot meet the blood pressure calculation requirements, continue to execute S309 until the collected data meet the blood pressure calculation requirements.

In the embodiment of the present application, the blood pressure measurement device obtains the first pulse wave signal through the pulse wave sensor when the air bag is not pressurized, and then obtains the second pulse wave signal when the air bag is pressurized, so that the blood pressure measurement device is The signal processing unit can combine the waveform characteristics of the user's first pulse wave signal and the amplitude envelope characteristics of the second pulse wave signal to estimate the blood pressure range of the user, so that the estimated blood pressure range is closer to the real value, and the measurement accuracy is improved. .

An embodiment of the present application further provides a processing apparatus. As shown in FIG. 15 , the processing apparatus 1500 may be configured in the blood pressure measurement apparatus described in the foregoing method embodiments, so that the blood pressure measurement apparatus implements the foregoing method embodiments process in .

Exemplarily, the processing apparatus 1500 includes an acquisition unit 1501 and a processing unit 1502 . The acquisition unit 1501 and the processing unit 1502 can communicate with each other through an internal connection path.

The obtaining unit 1501 is configured to obtain the pulse wave signal collected by the pulse wave sensor and the pressure signal of the gas inside the airbag collected by the air pressure sensor. The above processing unit 1502 is used to: estimate the blood pressure range of the user based on the pulse wave signal obtained by the obtaining unit 1501; determine a first threshold based on the blood pressure range; control the pump to pressurize the airbag at different rates according to the first threshold . Specifically, the processing unit 1502 can be used to control the pump to pressurize the air bag at a first rate until the pressure signal of the air bag reaches the first threshold; and to control the pump to continue to pressurize the air bag at a second rate Compression is performed to collect data for blood pressure measurement of the user. Wherein, the first rate is greater than the second rate.

Optionally, the pulse wave signal includes: a first pulse wave signal of the user obtained when the airbag is not pressurized. The processing unit 1502 is specifically configured to: estimate the blood pressure range based on the first pulse wave signal.

Optionally, the processing unit 1502 is specifically configured to: estimate the above-mentioned blood pressure range based on the waveform characteristics of the above-mentioned first pulse wave signal.

Optionally, the pulse wave signal includes: according to the second pulse wave signal of the user obtained when the balloon is pressurized, the third rate is less than or equal to the second rate. The processing unit 1502 is specifically configured to: estimate the blood pressure range based on the second pulse wave signal.

Optionally, the processing unit 1502 is specifically configured to: estimate the above-mentioned blood pressure range based on the amplitude envelope characteristic of the above-mentioned second pulse wave signal.

Optionally, the pulse wave signal includes: the first pulse wave signal of the user obtained when the airbag is not pressurized and the second pulse wave signal of the user obtained when the airbag is pressurized, and the third rate is less than or equal to the second rate. The processing unit 1502 is specifically configured to: estimate the blood pressure range based on the first pulse wave signal and the second pulse wave signal.

Optionally, the processing unit 1502 is specifically configured to: estimate the blood pressure range based on the waveform characteristics of the first pulse wave signal and the amplitude envelope characteristics of the second pulse wave signal.

It should be understood that the apparatus 1500 herein is embodied in the form of functional units. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a dedicated processor, or a group of processors, etc.) and memory, merge logic, and/or other suitable components to support the described functions. In an optional example, those skilled in the art can understand that the apparatus 1500 may be specifically the signal processing unit in the foregoing embodiment, or the function of the signal processing unit in the foregoing embodiment may be integrated in the apparatus 1500, and the apparatus 1500 may be used for Executing each process and/or step corresponding to the signal processing unit in the above method embodiments is not repeated here to avoid repetition.

The above-mentioned apparatus 1500 has the function of implementing the corresponding steps performed by the processing apparatus in the above-mentioned method; the above-mentioned functions may be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above-mentioned functions.

In the embodiment of the present application, the apparatus 1500 in FIG. 15 may also be a chip or a system of chips, such as a system on chip (system on chip, SoC).

The present application also provides a processing device configured in a blood pressure measurement device. The processing means may include a processor and a communication interface. The communication interface is coupled with the processor. The communication interface is used to input and/or output information. The information includes at least one of instructions and data. The processor is configured to execute a computer program, so that the blood pressure measuring device executes the method in any of the above method embodiments.

The embodiment of the present application also provides a processing device, which is configured in a blood pressure measurement device. The processing means may include a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the blood pressure measuring device executes the method in any of the above method embodiments.

It should be understood that in this embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) ), field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor executes the instructions in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific implementations of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A blood pressure measuring device, characterized in that the device comprises an air bag, a pump, a pulse wave sensor, an air pressure sensor and a signal processing unit; the pulse wave sensor, the air pressure sensor and the pump are respectively connected with the signal processing unit connected, and the pump is connected to the bladder, the blood pressure measuring device can be worn by a user and applies pressure to the user through the bladder; wherein,

The pulse wave sensor is used for: acquiring the pulse wave signal of the user, and sending the pulse wave signal to the signal processing unit;

The air pressure sensor is used for: acquiring a gas pressure signal inside the airbag, and sending the pressure signal to the signal processing unit;

The signal processing unit is used for:

estimating the blood pressure range of the user based on the pulse wave signal;

determining a first threshold based on the blood pressure range;

controlling the pump to pressurize the air bag at a first rate until the pressure signal of the air bag reaches the first threshold;

Continue to control the pump to pressurize the air bag at a second rate, and control the air pressure sensor to collect the user's blood pressure measurement during the process of the pump pressurizing the air bag at the second rate The data;

Wherein, the first rate is greater than the second rate.
The device according to claim 1, wherein the pulse wave sensor is specifically used for:

When the airbag is not pressurized, acquire the first pulse wave signal of the user, and send the first pulse wave signal to the signal processing unit;

The signal processing unit is specifically used for:

The blood pressure range is estimated based on the first pulse wave signal.
The device according to claim 2, wherein the signal processing unit is specifically configured to:

The blood pressure range is estimated based on the waveform characteristics of the first pulse wave signal.
The device according to claim 1, wherein the pulse wave sensor is specifically used for:

While the signal processing unit controls the pump to pressurize the balloon at a third rate, acquires the second pulse wave signal of the user, and sends the second pulse wave signal to the signal a processing unit, the third rate is less than or equal to the second rate;

The signal processing unit is specifically used for:

The blood pressure range is estimated based on the second pulse wave signal.
The device according to claim 4, wherein the signal processing unit is specifically configured to:

The blood pressure range is estimated based on the amplitude envelope feature of the second pulse wave signal.
The device according to claim 1, wherein the pulse wave sensor is specifically used for:

When the airbag is not pressurized, acquire the first pulse wave signal of the user, and send the first pulse wave signal to the signal processing unit;

While the signal processing unit controls the pump to pressurize the balloon at a third rate, acquires the second pulse wave signal of the user, and sends the second pulse wave signal to the signal a processing unit, the third rate is less than or equal to the second rate;

The signal processing unit is specifically used for:

The blood pressure range is estimated based on the first pulse wave signal and the second pulse wave signal.
The device according to any one of claims 1 to 6, wherein the pulse wave sensor comprises at least one of the following:

Photoplethysmography sensor, pressure sensor or ultrasonic sensor.
A pressurizing method, applied to the blood pressure measuring device according to claim 1, wherein the method comprises:

estimating the blood pressure range of the user based on the acquired pulse wave signal;

determining a first threshold based on the blood pressure range;

controlling the pump to pressurize the air bag at a first rate until the pressure signal of the air bag reaches the first threshold;

continuing to control the pump to pressurize the balloon at a second rate to collect data for the blood pressure measurement of the user;

Wherein, the first rate is greater than the second rate.
The method according to claim 8, wherein the obtained pulse wave signal is the first pulse wave signal of the user obtained by the pulse wave sensor when the air bag is not pressurized;

Based on the acquired pulse wave signal, the blood pressure range of the user is estimated, including:

The blood pressure range is estimated based on the first pulse wave signal.
The method according to claim 9, wherein estimating the blood pressure range based on the first pulse wave signal comprises:

The blood pressure range is estimated based on the waveform characteristics of the first pulse wave signal.
The method according to claim 8, wherein the acquired pulse wave signal is the user acquired by the pulse wave sensor while the pump pressurizes the balloon at a third rate the second pulse wave signal, the third rate is less than or equal to the second rate;

Based on the acquired pulse wave signal, the blood pressure range of the user is estimated, including:

The blood pressure range is estimated based on the second pulse wave signal.
The method according to claim 11, wherein, based on the acquired pulse wave signal, estimating the blood pressure range of the user, comprising:

The blood pressure range is estimated based on the amplitude envelope feature of the second pulse wave signal.
The method according to claim 8, wherein the acquired pulse wave signal comprises:

Obtaining the first pulse wave signal of the user when the airbag is not pressurized;

The second pulse wave signal of the user is obtained while the pump pressurizes the balloon according to a third rate, where the third rate is less than or equal to the second rate;

Based on the acquired pulse wave signal, the blood pressure range of the user is estimated, including:

The blood pressure range is estimated based on the first pulse wave signal and the second pulse wave signal.
The method according to any one of claims 8 to 13, wherein the pulse wave sensor comprises at least one of the following:

Photoplethysmography sensor, pressure sensor or ultrasonic sensor.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program comprising instructions for implementing the method according to any one of claims 8 to 14.
A program product, characterized in that the program product comprises a computer program, the computer program is stored in a readable storage medium, and at least one processor of a communication device can read the computer program from the readable storage medium , the at least one processor executing the computer program causes the communication device to implement the method according to any one of claims 8-15.