WO2019128768A1

WO2019128768A1 - Blood pressure measurement apparatus and blood pressure measurement method

Info

Publication number: WO2019128768A1
Application number: PCT/CN2018/121696
Authority: WO
Inventors: 裴璇
Original assignee: 华为技术有限公司
Priority date: 2017-12-29
Filing date: 2018-12-18
Publication date: 2019-07-04
Also published as: CN109984736A

Abstract

A blood pressure measurement apparatus and a blood pressure measurement method. For a blood pressure measurement apparatus having a wrist band the width of which is smaller than 60mm, the accuracy of blood pressure measurement is improved. The blood pressure measurement apparatus comprises an apparatus body (301), a wrist band (302) and a pulse sensor (306); the apparatus body (301) is connected to the wrist band (302); the apparatus body (301) comprises a housing (309), and a processor (303), a driving component and a pressure sensor (304) arranged within the housing (309); the pulse sensor (306) is fixed on a contact face of the wrist band (302) in contact with a wrist; the processor (303) controls the driving component to drive the wrist band (302) to linearly apply a pressure to an artery in the wrist; the pulse sensor (306) acquires a pulse shock wave signal in the process of the wrist band (302) linearly applying a pressure to an artery in the wrist; the pressure sensor (304) acquires a pressure signal in the wrist band (302) in the process of the wrist band (302) linearly applying a pressure to an artery in the wrist; the processor (303) acquires the pulse shock wave signal and the pressure signal, and separates a linear pressurization baseline signal from the pressure signal, and calculates a blood pressure value through the linear pressurization baseline signal and the pulse shock wave signal.

Description

Blood pressure measuring device and blood pressure measuring method

The present application claims priority to Chinese Patent Application No. 2009-11498237.7, entitled "A Blood Pressure Measurement Device and Blood Pressure Measurement Method", filed on Dec. 29, 2017, the entire contents of which is incorporated herein by reference. In the application.

Technical field

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

Background technique

With the development of the mobile health industry, users have put forward higher requirements for the monitoring of out-of-hospital health. Among them, continuous blood pressure monitoring is an important indicator of medical diagnosis and daily health monitoring. The hospital mainly uses cuff sphygmomanometer to measure blood pressure continuously. However, the device is bulky, inconvenient to carry, and has a poor measurement comfort experience, and patients often cannot adhere to the sphygmomanometer for a long time.

Integrating blood pressure detection into wearable devices, long-term and convenient blood pressure measurement is currently a major challenge. Currently, a wristband sphygmomanometer is available on the market, which will inflate and deflate the airbag in the wristband. During the linear pressurization of the airbag, the pressure signal detected by the pressure sensor in the sphygmomanometer is separated into two parts: a linear pressure baseline signal and a pulse oscillation wave signal, and the blood pressure is calculated by the measured pulse wave signal and the linear pressure baseline signal. value.

At present, the width of the commercial wristband sphygmomanometer is about 60mm, and if the width of the airbag in the wristband is further reduced from 60mm, the oscillating wave envelope separated from the pressure signal in the airbag will have a significant right shift phenomenon. The measured blood pressure value is too high, resulting in poor accuracy of blood pressure measurement.

Summary of the invention

The embodiment of the present application provides a blood pressure measuring device and a blood pressure measuring method for solving the problem that the wristband blood pressure meter of the prior art has poor accuracy in measuring blood pressure.

In view of this, the first aspect of the embodiments of the present application provides a blood pressure measuring device, including: a device body, a wristband, and a pulse sensor; the device body is connected to the wristband, and the wristband is used to The device body is worn on the wrist of the user;

The device body includes a housing and a processor, a driving assembly and a pressure sensor disposed in the housing;

The processor is coupled to the drive assembly, the pressure sensor, and the pulse sensor;

The pressure sensor is connected to the wristband;

The pulse sensor is fixed on a contact surface of the wristband and the wrist;

The processor is configured to control the driving component to drive the wristband to apply pressure to the wrist artery linearly;

The pulse sensor is configured to acquire a pulse shock wave signal during linear application of pressure to the wristband of the wristband;

The pressure sensor is configured to acquire a pressure signal in the wristband during linear application of pressure to the wristband of the wristband;

The processor is configured to acquire the pulse oscillating wave signal and the pressure signal, and separate a linear pressure baseline signal from the pressure signal, and calculate the linear pressure baseline signal and the pulse oscillating wave signal Blood pressure value.

With the solution provided by the embodiment of the present application, the pulse sensor fixed on the contact surface of the wristband and the wrist can acquire a pulse shock wave signal, and the pulse shock wave signal is offset from the pulse shock wave signal separated from the pressure signal in the prior art. The smaller amount increases the accuracy of blood pressure measurement.

It should be noted that the blood pressure measuring device further includes a power component, a display component, a wireless communication component, a memory, and the like, wherein the power component supplies power to the blood pressure measuring device, the memory can be used to store the software program and the module, and the memory can include high speed random storage. The memory may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device, the wireless communication component can communicate with other devices, and the display component can be used on the display screen. The measured blood pressure value is displayed.

Optionally, the blood pressure measuring device may further comprise a photoplethysmography (PPG) module for detecting the heart rate.

With reference to the first aspect of the embodiments of the present application, in the first implementation manner of the first aspect of the embodiment of the present application,

The processor is specifically configured to determine a first inflection point and a second inflection point of the pulse wave signal, and obtain a first time point and the second point of the first inflection point in the pulse wave signal The inflection point is at a corresponding second time point in the pulse shock wave signal, and further determines a corresponding value of the systolic blood pressure (SBP) in the linear pressure baseline signal at the first time point. The corresponding value in the linear pressure baseline signal at the two time points is the diastolic blood pressure (DBP).

With reference to the first aspect of the embodiments of the present application, in the second implementation manner of the first aspect of the embodiment, the wristband is an airbag;

The drive assembly includes a micropump and an air pump interface;

The micropump is for inflating the balloon through the air pump interface to apply pressure linearly to the wrist artery.

It can be understood that the processor controls the micropump through the driving circuit to inflate the airbag through the air pump interface to ensure that the airbag applies pressure to the wrist.

With the solution provided by the embodiment of the present application, the wristband is an airbag, and the scheme is more practical by inflating the balloon to inflate the wrist artery to the wrist.

With reference to the second embodiment of the first aspect of the embodiments of the present application, in the third embodiment of the first aspect of the embodiments of the present application, the pressure sensor includes a sensitive component, and the sensitive component is connected to the airbag;

The pressure sensor is specifically configured to acquire a pressure signal in the airbag through the sensitive component during linear application of pressure to the wrist artery of the airbag.

With reference to the first aspect of the embodiments of the present application, in a fourth implementation manner of the first aspect of the embodiments of the present application, the wristband is a spring device;

The drive assembly includes a spring device controller;

The spring device controller is configured to control the spring device to apply pressure linearly to the wrist artery.

With the solution provided by the embodiment of the present application, the wristband can also be a spring device, and the flexibility of the solution is improved by controlling the spring device to apply pressure linearly to the wrist artery.

With reference to the fourth embodiment of the first aspect of the embodiments of the present application, in a fifth implementation manner of the first aspect of the embodiments of the present application, the pressure sensor includes a sensitive component, and the sensitive component is connected to the spring device;

The pressure sensor is specifically configured to acquire a pressure signal in the spring device through the sensitive component during a linear application of pressure to the wrist artery of the spring device.

With reference to the first aspect of the embodiment of the present application, or the first embodiment of the first aspect of the embodiment of the present application, or the second embodiment of the first aspect of the embodiment of the present application, or the third aspect of the first aspect of the embodiment of the present application An implementation manner, or a fourth implementation manner of the first aspect of the embodiment of the present application, or a fifth implementation manner of the first aspect of the embodiment of the present application, in a sixth implementation manner of the first aspect of the embodiment of the present application, The outer surface of the pulse sensor does not exceed the contact surface of the wristband and the wrist, and the pulse sensor is located at a central position in the width direction of the wristband. According to the solution provided by the embodiment of the present application, the pulse sensor is worn by the user. It is easier to get close to the artery of the user's wrist, and according to experiments, it can be found that the pulse wave at the center of the width of the bottom of the wristband has almost no offset, and the position with a certain offset from the center position is offset. Therefore, the pulse wave signal obtained by the pulse sensor located at the center position in the width direction of the wristband is separated from the pressure signal by the prior art. Shockwave signal offset is small stroke, less than the width of the wristband for blood pressure measurement device of 60mm, to improve the accuracy of blood pressure measurement.

With reference to the first aspect of the embodiment of the present application, or the first embodiment of the first aspect of the embodiment of the present application, or the second embodiment of the first aspect of the embodiment of the present application, or the third aspect of the first aspect of the embodiment of the present application The fourth embodiment of the first aspect of the embodiment of the present application, or the fifth embodiment of the first aspect of the embodiment of the present application, in the seventh implementation manner of the first aspect of the embodiment of the present application, The pulse sensor is a graphene-based sensor. With the solution provided by the embodiment of the present application, the pulse sensor is more easily attached to the skin of the human body, so that the pulse wave signal obtained by the pulse sensor is more accurate.

With reference to the first aspect of the embodiment of the present application, or the first embodiment of the first aspect of the embodiment of the present application, or the second embodiment of the first aspect of the embodiment of the present application, or the third aspect of the first aspect of the embodiment of the present application The embodiment, or the fourth embodiment of the first aspect of the embodiment of the present application, or the fifth embodiment of the first aspect of the embodiment of the present application, in the eighth implementation manner of the first aspect of the embodiment of the present application, The blood pressure measuring device further includes:

a sensor interface for connecting the pressure sensor and the wristband, the sensor interface comprising an inter-integrated circuit (I2C), a universal asynchronous receiver transmitter (UART) or a serial peripheral A serial interface (SPI) is provided by the embodiment of the present application. The sensor interface can have multiple application forms, which improves the flexibility of the solution.

With reference to the first aspect of the embodiment of the present application, or the first embodiment of the first aspect of the embodiment of the present application, or the second embodiment of the first aspect of the embodiment of the present application, or the third aspect of the first aspect of the embodiment of the present application The ninth embodiment of the first aspect of the present application, or the ninth embodiment of the first aspect of the present application, The width of the pulse sensor is less than one-half of the width of the wristband, and the measurement error caused by the boundary effect can be reduced as much as possible by the solution provided by the embodiment of the present application.

A second aspect of the present application provides a blood pressure measuring method, the method being applied to a blood pressure measuring device, the blood pressure measuring device comprising: a device body, a wristband and a pulse sensor; the device body is connected to the wristband The wrist strap is used to wear the device body on a wrist of a user;

The pressure sensor is connected to the wristband;

The pulse sensor is fixed on a contact surface of the wristband and the wrist;

The method is performed by the processor, the method comprising:

The processor controls the drive assembly to drive the wristband to apply pressure linearly to the wrist artery;

Obtaining, by the processor, a pulse shock wave signal obtained by the pulse sensor during a linear application of pressure on the wristband of the wrist artery;

The processor acquires a pressure signal in the wristband acquired by the pressure sensor during linear application of pressure to the wristband of the wrist artery;

The processor separates a linearly pressurized baseline signal from the pressure signal and calculates a blood pressure value from the pulsed shockwave signal and the pulsed shockwave signal.

With reference to the second aspect of the embodiments of the present application, in a first implementation manner of the second aspect of the embodiments of the present application, the processor separates a linear pressure baseline signal from the pressure signal, and passes the linear pressure baseline The signal and the pulse wave signal calculate the blood pressure value including:

Determining, by the processor, a first inflection point and a second inflection point of the pulse oscillation wave signal, and obtaining a first time point corresponding to the first inflection point in the pulse oscillation wave signal and the second inflection point in the Corresponding second time point in the pulse shock wave signal, thereby determining that the corresponding value of the first time point in the linear pressure baseline signal is a systolic pressure SBP, and the second time point is at the linear pressure baseline The corresponding value in the signal is the diastolic pressure DBP.

With reference to the second aspect of the embodiment of the present application, in the second implementation manner of the second aspect of the embodiment, the wristband is an airbag;

The drive assembly includes a micropump and an air pump interface;

The processor controlling the driving component to drive the wristband to apply pressure to the wrist artery linearly includes:

The processor controls the micropump to inflate the balloon through the air pump interface to apply pressure linearly to the wrist artery.

With reference to the second embodiment of the second aspect of the embodiments of the present application, in the third embodiment of the second aspect of the embodiments of the present application, the pressure sensor includes a sensitive component, and the sensitive component is connected to the airbag, The processor obtains a pressure signal in the wristband acquired by the pressure sensor during linear application of pressure to the wristband of the wrist artery:

The processor controls the pressure sensor to acquire a pressure signal within the airbag through the sensitive component during linear application of pressure by the airbag to the wrist artery.

With reference to the second aspect of the embodiment of the present application, in the fourth implementation manner of the second aspect of the embodiment, the wristband is a spring device;

The drive assembly includes a spring device controller;

The processor controls the spring device to apply a linear pressure to the wrist artery by controlling the spring device controller.

With reference to the fourth embodiment of the second aspect of the embodiments of the present application, in a fifth implementation manner of the second aspect of the embodiments of the present application, the pressure sensor includes a sensitive component, and the sensitive component is connected to the spring device. The processor obtains a pressure signal in the wristband acquired by the pressure sensor during linear application of pressure to the wristband of the wrist artery:

The processor controls the pressure sensor to acquire a pressure signal within the spring device through the sensitive component during linear application of pressure by the spring device to the wrist artery.

DRAWINGS

Figure 1 is a schematic view of a wristband sphygmomanometer;

Figure 2 is a schematic diagram of pulse shock waves detected by different wristband widths;

3 is a schematic structural view of a blood pressure measuring device of the present application;

4 is a schematic diagram showing the degree of envelope offset of the center section and the offset section of different wristband widths;

5 is a schematic diagram showing a comparison of a pulse shock wave measured by a pulse sensor and a pulse shock wave separated from a pressure signal measured by a pressure sensor;

6 is a schematic diagram of calculating blood pressure by a pulsed shock wave measured by a pulse sensor and a linear pressurized baseline signal separated from a pressure signal measured by a pressure sensor;

Figure 7 is a circuit system frame diagram of the blood pressure measuring device of the present application;

Fig. 8 is a schematic view showing the product of the blood pressure measuring device of the present application.

Detailed ways

The embodiment of the present application provides a blood pressure measuring device and a blood pressure measuring method for improving the accuracy of blood pressure measurement.

The blood pressure measuring device in the embodiment of the present application is specifically applied to the field of wearable medical devices. As shown in FIG. 1 , the existing wristband blood pressure meter uses an oscillometric method to measure blood pressure. Specifically, the wrist strap is first bundled. On the wrist, the wristband is inflated, and after a certain pressure, the pressure is stopped. When the blood flows in the blood vessel, there will be a certain oscillating wave. The oscillating wave propagates through the air tube to the pressure sensor, and the pressure sensing can detect the measured in real time. The pressure and fluctuations in the wristband, the processor separates the pressure signal detected by the pressure sensor into two parts: a linear pressure baseline signal and a pulse oscillation wave signal, and the linear pressure baseline signal is separated from the pressure signal over time. a portion of the signal that changes linearly, and then calculates a blood pressure value by using the measured pulse wave signal and the linear pressure baseline signal, wherein when the amplitude of the pulse wave is maximum, the mean blood pressure (MBP) is The systolic blood pressure (SBP) corresponds to the first inflection point of the pulse wave signal envelope, and the diastolic blood pressure (DBP) pair Should be at the second inflection point of the pulse wave signal envelope.

The wristband width of the current wristband sphygmomanometer is generally 60mm. If the width of the balloon in the wristband is further reduced from 60mm, the pulse wave envelope separated from the pressure signal in the airbag will have a significant right shift phenomenon. As shown in Fig. 2, the pulse wave envelope and corresponding MBP of the wristband widths of 25mm, 35mm and 45mm in the same environment are measured by experiments. The abscissa of the three figures in the first row in Fig. 2 Represents time, the unit is seconds, the ordinate represents the blood pressure value, the unit is millimeter mercury column, the abscissa of the three figures in the second row in Figure 2 represents time, the unit is second, and the ordinate represents the amplitude of the pulse oscillation wave, from the figure It can be seen that when the wristband width is 45mm, the pulse oscillating wave reaches the peak time of about 4 seconds, and when the wristband width is 35mm, the pulse oscillating wave reaches the peak time of about 6 seconds, and the wristband width is 25mm. The time when the pulse oscillating wave reaches the peak is about 15 seconds. The smaller the width of the wristband is, the longer the pulse oscillating wave reaches the peak. Correspondingly, the smaller the wristband width, the higher the measured blood pressure value.

In order to ensure the wearing comfort, the width of the wristband required by the wearable device is generally not more than 25mm, and the wristband type sphygmomanometer of the prior art can only achieve about 60mm, and there is still a large gap, in order to solve the above problem, The application provides a blood pressure measuring device that can measure blood pressure relatively accurately when the wristband width is less than 60 mm.

For ease of understanding, the specific composition and function of the blood pressure measuring device in the embodiment of the present application will be described below with reference to FIG. 3:

3 is a schematic structural diagram of a blood pressure measuring device according to an embodiment of the present application. The blood pressure measuring device includes a device body 301, a wristband 302, and a pulse sensor 306. The wristband is used as an airbag. The device body 301 includes a housing 309. And a processor 303, a pressure sensor 304 and a micro pump 305 disposed in the housing 309. The housing 309 is fixedly coupled to the wristband 302. The wristband 302 can be used to wear the device body 301 on the wrist of the user. The pressure sensor 304 And the micropump 305 is coupled to the processor 303 (eg, these devices can be placed on a printed circuit board, connected by signal traces on a printed circuit board), and the sensor interface 307 is a pressure sensor 304 and a wristband 302. The air pump interface 308 is an interface for the micro pump 305 to charge and deflate the air bag. The pulse sensor 306 is fixed on the contact surface of the wrist band 302 and the wrist, and the pulse sensor 306 is located at the center of the wristband 302 in the width direction. The central position can be understood as the proximity of the two long sides of the pulse sensor 306 to the wristband 302. In addition, the outer surface of the pulse sensor 306 does not extend beyond the wristband 302 and wrist. The contact surface, the pulse sensor 306 can be connected to the printed circuit board where the processor 303 is located through the flexible printed circuit board. In the flexible printed circuit board and the printed circuit board, the signal line connecting the pulse sensor 306 and the processor 303 can be disposed to realize the pulse. Sensor 306 is coupled to processor 303.

The product form of the blood pressure measuring device in the embodiment of the present application can be specifically as shown in FIG. 8. The width of the wristband is narrower than that of the existing wristband blood pressure meter, and is similar to the width of the strap of an ordinary watch, which is more convenient for the user to wear. .

Through experiments, it can be found that for wristbands of different widths, the pulse wave near the center of the width of the wristband has almost no offset, and the position with a certain offset from the center position has an offset phenomenon, and the distance is more Far, the more obvious the offset, please refer to Figure 4 for the specific test results. The abscissa in Figure 4 indicates the offset of the cross section on the wristband relative to the center position, the unit is mm, and the position of the abscissa 0 indicates the width of the wristband. The cross section at the upper center position, the ordinate in Fig. 4 indicates the time at which the pulse oscillating wave reaches the peak, in seconds, as can be seen from the figure, when the center position in the width direction of the wristband is tested, the wristband width is When the 50mm is reduced to 25mm, the time when the pulse oscillating wave reaches the peak does not become significantly longer. When the position is 10mm offset from the center position, the wristband width is reduced from 50mm to 25mm, and the pulse oscillating wave reaches the peak value. Time can be seen to be significantly longer.

Therefore, the pulse wave signal obtained by the pulse sensor located at the center of the width of the wristband is smaller than the pulse wave signal separated from the pressure signal in the prior art, and the test result is shown in FIG. 5 (a) ) indicates the pulse wave signal obtained from the pulse sensor, and (b) indicates the pulse wave signal separated from the pressure signal acquired by the pressure sensor. It can be clearly seen that (b) the time when the pulse wave signal reaches the peak value. It takes longer than the pulse of the pulse wave signal in (a) to reach the peak value.

The flow of blood pressure measurement in the embodiment of the present application will be described below in conjunction with the functions of the components of the blood pressure measuring device:

The processor 303 controls the micropump 305 through the driving circuit to inflate the airbag through the air pump interface 308 to ensure that the airbag applies pressure linearly to the wrist. It can be understood that the air pressure can be linearly applied to the wrist by uniformly inflating the airbag. During the pressurization process, the sensitive component of the pressure sensor 304 is coupled to the air bag, and the sensitive component can acquire a pressure signal in the air bag, and then the pressure signal can be transmitted to the pressure sensor 304 through the sensor interface 307, and the pulse sensor 306 is placed on The pulse wave signal is obtained from the wrist pulse, and the processor 303 separates the linear pressure baseline signal from the pressure signal, and then calculates the blood pressure value by the correspondence between the linear pressure baseline signal and the pulse wave signal, as shown in FIG. (a) is the pressure signal detected from the pressure sensor 304, (b) is a linear pressure baseline signal separated from the pressure signal, (c) is a pulse oscillation wave signal separated from the pressure signal, and (d) is a slave The pulse wave signal obtained by the pulse sensor 306 in the pressurized state determines the (d) medium pulse wave The first inflection point and the second inflection point, the first inflection point may be a fluctuation point of the pulse oscillation wave signal at a peak on the left side of the peak at 0.45, and the second inflection point may be a fluctuation of the pulse oscillation wave signal at a peak on the right side of the peak value of 0.75. Point, and then respectively obtain the first time point corresponding to the first inflection point in (d) and the second time point corresponding to the second inflection point in (d), and further determine the ordinate corresponding to the first time point in (b) The value of the ordinate is the SBP, and the value of the ordinate corresponding to the second time point is DBP.

Optionally, the first inflection point and the second inflection point may also be other fluctuation points. For example, the first inflection point is a fluctuation point on the left side of the peak of the pulse oscillation wave signal of 0.4, and the second inflection point is the right side of the peak of the pulse oscillation wave signal. The peak value is a fluctuation point of 0.7, which is not limited here.

Optionally, in the embodiment of the present application, the wristband 302 may be other than the airbag, and may be other devices that can directly apply pressure to the wrist artery. For example, the wristband may also be a spring device, which is controlled by the spring device controller. The spring device applies pressure linearly to the wrist artery, which is not limited herein.

Optionally, the sensor interface 307 may be an I2C, and may be in other forms, such as a UART or an SPI, which is not limited herein.

Optionally, the pulse sensor 306 can be a flexible sensor, that is, the pulse sensor 306 is made of a flexible material, so that the pulse sensor 306 can be better fitted to the human body, and the pulse wave signal acquired by the pulse sensor 306 is also More specifically, specifically, the pulse sensor 306 may be a graphene material-based sensor. For example, the pulse sensor 306 may include a graphene sheet, and the graphene sheet is used to detect contact deformation, which may affect the resistance change. , thus producing different electrical signals. The specific implementation method of the pulse sensor 306 is prior art, and is not described in this application.

Optionally, the width of the pulse sensor 306 is preferably less than one-half of the width of the wristband. On the basis of ensuring the fit of the pulse sensor 306 and the pulse, the measurement error caused by the boundary effect is reduced as much as possible, and the pulse sensor 306 is 306. The length is not guaranteed to exceed the length of the wristband, and there are no additional restrictions.

It should be noted that the blood pressure measuring device further includes a power component, a display component, a wireless communication component, a memory, and the like, as shown in FIG. 7, wherein the power component supplies power to the blood pressure measuring device, and the memory can be used to store the software program and the module. The memory may include a high speed random access memory, and may also include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, or other volatile solid state storage device, and the wireless communication component may communicate with other devices, the display component Can be used to display the measured blood pressure value on the display.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present application and the above figures are used to distinguish similar objects, and are not necessarily used for Describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

The above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents. The modifications and substitutions of the embodiments do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A blood pressure measuring device, comprising: a device body, a wristband and a pulse sensor; the device body is connected to the wristband, and the wristband is used for wearing the device body on a wrist of a user;

The device body includes a housing and a processor, a driving assembly and a pressure sensor disposed in the housing;

The processor is coupled to the drive assembly, the pressure sensor, and the pulse sensor;

The pressure sensor is connected to the wristband;

The pulse sensor is fixed on a contact surface of the wristband and the wrist;

The processor is configured to control the driving component to drive the wristband to apply pressure to the wrist artery linearly;

The pulse sensor is configured to acquire a pulse shock wave signal during linear application of pressure to the wristband of the wristband;

The pressure sensor is configured to acquire a pressure signal in the wristband during linear application of pressure to the wristband of the wristband;

The processor is configured to acquire the pulse oscillating wave signal and the pressure signal, and separate a linear pressure baseline signal from the pressure signal, and calculate the linear pressure baseline signal and the pulse oscillating wave signal Blood pressure value.
The blood pressure measuring device according to claim 1, wherein

The processor is specifically configured to determine a first inflection point and a second inflection point of the pulse wave signal, and obtain a first time point and the second point of the first inflection point in the pulse wave signal The inflection point is at a corresponding second time point in the pulse shock wave signal, thereby determining a corresponding value of the first time point in the linear pressurized baseline signal as a systolic pressure SBP, and the second time point is in the The corresponding value in the linearly pressurized baseline signal is the diastolic pressure DBP.
The blood pressure measuring device according to claim 1, wherein the wristband is an airbag;

The drive assembly includes a micropump and an air pump interface;

The micropump is for inflating the balloon through the air pump interface to apply pressure linearly to the wrist artery.
A blood pressure measuring device according to claim 3, wherein said pressure sensor comprises a sensitive member, said sensitive member being coupled to said air bag;

The pressure sensor is specifically configured to acquire a pressure signal in the airbag through the sensitive component during linear application of pressure to the wrist artery of the airbag.
The blood pressure measuring device according to claim 1, wherein the wristband is a spring device;

The drive assembly includes a spring device controller;

The spring device controller is configured to control the spring device to apply pressure linearly to the wrist artery.
A blood pressure measuring device according to claim 5, wherein said pressure sensor comprises a sensitive member, said sensitive member being coupled to said spring means;

The pressure sensor is specifically configured to acquire a pressure signal in the spring device through the sensitive component during a linear application of pressure to the wrist artery of the spring device.
The blood pressure measuring device according to any one of claims 1 to 6, wherein an outer surface of the pulse sensor does not exceed a contact surface of the wristband and a wrist, and the pulse sensor is located at a width of the wristband The center position in the direction.
The blood pressure measuring device according to any one of claims 1 to 6, wherein the pulse sensor is a graphene-based sensor.
A blood pressure measuring method, characterized in that the method is applied to a blood pressure measuring device, the blood pressure measuring device comprising: a device body, a wristband and a pulse sensor; the device body is connected to the wristband, the wristband For wearing the device body on a wrist of a user;

The device body includes a housing and a processor, a driving assembly and a pressure sensor disposed in the housing;

The processor is coupled to the drive assembly, the pressure sensor, and the pulse sensor;

The pressure sensor is connected to the wristband;

The pulse sensor is fixed on a contact surface of the wristband and the wrist;

The method is performed by the processor, the method comprising:

The processor controls the drive assembly to drive the wristband to apply pressure linearly to the wrist artery;

Obtaining, by the processor, a pulse shock wave signal obtained by the pulse sensor during a linear application of pressure on the wristband of the wrist artery;

The processor acquires a pressure signal in the wristband acquired by the pressure sensor during linear application of pressure to the wristband of the wrist artery;

The processor separates a linearly pressurized baseline signal from the pressure signal and calculates a blood pressure value from the pulsed shockwave signal and the pulsed shockwave signal.
The method of claim 9 wherein said processor separates a linearly pressurized baseline signal from said pressure signal and calculates a blood pressure value from said pulsed baseline signal and said pulsed wave signal include:

Determining, by the processor, a first inflection point and a second inflection point of the pulse oscillation wave signal, and obtaining a first time point corresponding to the first inflection point in the pulse oscillation wave signal and the second inflection point in the Corresponding second time point in the pulse shock wave signal, thereby determining that the corresponding value of the first time point in the linear pressure baseline signal is a systolic pressure SBP, and the second time point is at the linear pressure baseline The corresponding value in the signal is the diastolic pressure DBP.
The method of claim 9 wherein said wristband is a bladder;

The drive assembly includes a micropump and an air pump interface;

The processor controlling the driving component to drive the wristband to apply pressure to the wrist artery linearly includes:

The processor controls the micropump to inflate the balloon through the air pump interface to apply pressure linearly to the wrist artery.
The method according to claim 11, wherein said pressure sensor comprises a sensitive element, said sensitive element being coupled to said air bag, said processor acquiring said pressure sensor linearly applied to said wristband of said wrist artery The pressure signals in the wristband obtained during the stress process include:

The processor controls the pressure sensor to acquire a pressure signal within the airbag through the sensitive component during linear application of pressure by the airbag to the wrist artery.
The method of claim 9 wherein said wristband is a spring device;

The drive assembly includes a spring device controller;

The processor controlling the driving component to drive the wristband to apply pressure to the wrist artery linearly includes:

The processor controls the spring device to apply a linear pressure to the wrist artery by controlling the spring device controller.
The method of claim 13 wherein said pressure sensor comprises a sensitive element coupled to said spring means, said processor acquiring said pressure sensor linearly in said wristband of a wrist artery The pressure signals in the wristband acquired during the application of pressure include:

The processor controls the pressure sensor to acquire a pressure signal within the spring device through the sensitive component during linear application of pressure by the spring device to the wrist artery.