CN116115205A - Blood pressure measuring method, device, electronic equipment and storage medium - Google Patents
Blood pressure measuring method, device, electronic equipment and storage medium Download PDFInfo
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- CN116115205A CN116115205A CN202211741112.3A CN202211741112A CN116115205A CN 116115205 A CN116115205 A CN 116115205A CN 202211741112 A CN202211741112 A CN 202211741112A CN 116115205 A CN116115205 A CN 116115205A
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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Abstract
The application provides a blood pressure measurement method, a blood pressure measurement device, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring a personalized optimal contact pressure interval of a target object; controlling the contact pressure between the photoplethysmography PPG sensor and the target subject skin to be within a personalized optimal contact pressure interval; and acquiring a PPG signal acquired by a PPG sensor, and acquiring a blood pressure value of the target object according to the PPG signal. According to the method and the device, the contact pressure between the PPG sensor and the skin of the target object can be controlled according to the personalized optimal contact pressure interval of the target object, which is determined in advance, in the process of continuously measuring the blood pressure of the target object, so that the contact pressure is in the personalized optimal contact pressure interval, the quality of the collected PPG signal can be improved, and the blood pressure measurement precision is improved.
Description
Technical Field
The present disclosure relates to the field of noninvasive continuous blood pressure monitoring, and in particular, to a blood pressure measurement method, device, electronic apparatus, and storage medium.
Background
Blood pressure is an important physiological index reflecting the cardiovascular function of a human body, and the blood pressure level has close causal relationship with the incidence and death risk of cardiovascular and cerebrovascular diseases. In recent years, the incidence of hypertension is continuously rising, and complications such as heart disease, apoplexy and the like are frequently caused, so that the health of a human body is seriously threatened. Compared with single blood pressure measurement, continuous blood pressure monitoring can reduce the influence of accidental factors on measurement results, so that people can know the change rule of blood pressure, long-term blood pressure information of patients is provided for medical staff, and the accuracy of cardiovascular system state assessment is improved.
Disclosure of Invention
The present application aims to solve, at least to some extent, one of the technical problems in the related art.
To this end, a first aspect of the present application proposes a blood pressure measurement method comprising:
acquiring a personalized optimal contact pressure interval of a target object;
controlling a contact pressure between a photoplethysmography, PPG, sensor and the target subject skin to be within the personalized optimal contact pressure interval;
and acquiring a PPG signal acquired by the PPG sensor, and acquiring the blood pressure value of the target object according to the PPG signal.
A second aspect of the present application proposes a blood pressure measurement device comprising:
a negative feedback control unit, configured to determine a personalized optimal contact pressure interval of the target object, and control a contact pressure between a photoplethysmography PPG sensor and a target object skin to be within the personalized optimal contact pressure interval;
and the blood pressure calculation unit is used for acquiring the PPG signal acquired by the PPG sensor and acquiring the blood pressure value of the target object according to the PPG signal.
A third aspect of the present application proposes an electronic device comprising:
a photoplethysmography PPG sensor;
a pressure sensor;
a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of the first aspect described above when executing the program.
A fourth aspect of the application proposes a computer readable storage medium, which when executed by a processor of an electronic device, enables the electronic device to perform the method of the first aspect.
According to the blood pressure measuring method, according to the personalized optimal contact pressure interval of the target object, in the process of continuously measuring the blood pressure of the target object, the contact pressure between the PPG sensor and the skin of the target object is controlled, so that the contact pressure is in the personalized optimal contact pressure interval, the quality of the collected PPG signal can be improved, and the blood pressure measuring precision is improved.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic flow chart of a blood pressure measurement method according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for determining a personalized optimal contact pressure interval provided by an implementation of the present application;
fig. 3 is a schematic diagram of a blood pressure measurement device according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of another blood pressure measuring device according to an embodiment of the present disclosure;
fig. 5 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
Currently, the measurement of photoplethysmography (PPG) signals by using an optical principle to estimate blood pressure becomes the main stream of a cuff-free continuous blood pressure measurement technology, and the scheme discards the interference of a cuff, and avoids infection in a non-invasive manner. However, when continuously acquiring the PPG signal, it is difficult to ensure that the contact pressure between the PPG sensor and the skin of the person to be measured remains unchanged all the time. The contact pressure between the PPG sensor and the skin of the person to be measured has a great influence on the waveform of the PPG signal, so that the amplitude of the waveform is influenced, the time domain position of the characteristic point is also influenced, and the accuracy of measuring the blood pressure is further influenced.
Therefore, the application provides a blood pressure measurement method, a device, electronic equipment and a storage medium, wherein in continuous blood pressure measurement, the contact pressure between a PPG sensor and the skin of a person to be measured is adjusted, the PPG signal quality is improved, and therefore the blood pressure measurement precision is improved. Specifically, a blood pressure measurement method, apparatus, electronic device, and storage medium of the embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a blood pressure measurement method according to an embodiment of the present application. As shown in fig. 1, the blood pressure measurement method includes the steps of:
The contact pressure is the contact pressure between the PPG sensor and the skin of the target subject. Wherein, PPG sensor can be configured on wearable devices such as wrist strap, wrist watch. Different target objects have different personalized optimal contact pressure intervals, which are predetermined. In the personalized optimal contact pressure interval, the quality of the PPG signal acquired by the PPG sensor is optimal, such as the maximum amplitude of the PPG signal, the strongest signal-to-noise ratio and the like. The method for determining the personalized optimal contact pressure interval of the target object in the embodiment of the present application may refer to the description in the subsequent embodiment of the present application, and will not be described herein.
Optionally, in some embodiments of the present application, the contact pressure between the PPG sensor and the skin of the target subject and the personalized optimal contact pressure interval may be obtained according to the pressure sensor, and the contact pressure may be adaptively adjusted based on a negative feedback adjustment mechanism to control the contact pressure to be within the personalized optimal contact pressure interval.
As an example, the contact pressure between the PPG sensor collected by the pressure sensor and the skin of the target subject may be obtained, and the contact pressure may be compared with the personalized optimal contact pressure interval. If the contact pressure is greater than the maximum value in the personalized optimal contact pressure interval, reducing the contact pressure between the PPG sensor and the target subject skin through actuator control until the contact pressure between the PPG sensor and the target subject skin is in the personalized optimal contact pressure interval; if the contact pressure is smaller than the minimum value in the personalized optimal contact pressure interval, the contact pressure between the PPG sensor and the target subject skin is increased through the actuator control until the contact pressure between the PPG sensor and the target subject skin is in the personalized optimal contact pressure interval; if the contact pressure acquired by the pressure sensor is in the personalized optimal contact pressure interval, the contact pressure between the PPG sensor and the skin of the target object is not required to be adjusted. Wherein the pressure sensor, the actuator and the PPG sensor are configured within the same wearable device.
As another example, the contact pressure may also be compared to a personalized optimal contact pressure interval according to the contact pressure between the PPG sensor collected by the pressure sensor and the skin of the target subject. If the contact pressure is larger than the maximum value in the personalized optimal contact pressure interval, generating first prompt information, wherein the first prompt information is used for reminding the target object of reducing the contact pressure between the PPG sensor and the target object skin until the contact pressure between the PPG sensor and the target object skin is in the personalized optimal contact pressure interval; and if the contact pressure is smaller than the minimum value in the personalized optimal contact pressure interval, generating second prompt information, wherein the second prompt information is used for reminding the target object to increase the contact pressure between the PPG sensor and the target object skin until the contact pressure between the PPG sensor and the target object skin is in the personalized optimal contact pressure interval.
Optionally, in some embodiments of the present application, the PPG signal collected by the PPG sensor is preprocessed and a feature value is calculated, and a blood pressure value of the corresponding target subject is obtained through a pre-trained blood pressure estimation model. Alternatively, in other implementations of the present application, an ECG (electrocardiogram) signal may be obtained, and a blood pressure value of the corresponding target subject may be obtained in combination with the PPG signal, the ECG signal, and the corresponding blood pressure estimation model.
According to the blood pressure measuring method, according to the personalized optimal contact pressure interval of the target object, in the process of continuously measuring the blood pressure of the target object, the contact pressure between the PPG sensor and the skin of the target object is controlled, so that the contact pressure is in the personalized optimal contact pressure interval, the quality of the collected PPG signal can be improved, and the blood pressure measuring precision is improved.
Fig. 2 is a flowchart of a method for determining a personalized optimal contact pressure interval according to an embodiment of the present application. As shown in fig. 2, the method may include, but is not limited to, the following steps.
As an example, the preset contact pressure interval may be set to 0.2N-2N, and divided into a plurality of contact pressure sub-intervals of 0.2N-0.3N,0.3N-0.4N, …,1.9N-2N according to the fixed interval of 0.1. It should be noted that, in the present embodiment, the preset contact pressure interval range and the fixed interval value are only exemplary, and are not limited to the present application.
In some embodiments of the present application, the controllable actuator controls the contact pressure between the PPG sensor and the skin of the subject to be at different contact pressure sub-intervals, and collects PPG signals collected at each contact pressure sub-interval.
In some embodiments of the present application, the template PPG signal and the plurality of test PPG signals in each PPG signal may be determined from PPG signals acquired at each contact pressure subinterval. For example, a 10 second PPG signal acquired at a certain contact pressure subinterval, where the first 2 seconds of the PPG signal is taken as a template PPG signal, and in the last 8 seconds of the PPG signal, each second of the PPG signal is taken as a test PPG signal.
And (3) carrying out normalization processing on the template PPG signal, as shown in a formula (1). The plurality of test PPG signals are normalized as shown in equation (2).
X NoRM ＝ (X-μ X )/σ X (1)
Y NORM ＝ (Y-μ Y )/σ Y (2)
Wherein X is a test PPG signal (vector), X NORM Mu, as normalized test PPG signal X To test the mean value of the PPG signal, σ X To test the standard deviation of the PPG signal, Y is the template PPG signal (vector), Y NORM Mu, as normalized template PPG signal Y For the average value of the template PPG signal, σ Y Is the standard deviation of the template PPG signal.
According to the normalized template PPG signal Y NORM And a plurality of test PPG signals X NORM Acquiring a template PPG signal and testing PCross-correlation coefficient of PG signal and time delay. As shown in equation (3) and equation (4).
Wherein m represents a sampling point subscript in the PPG signal, n represents a time delay, fs is a sampling frequency, ρ XY Representing a test PPG signal X NORM Template PPG Signal Y NORM Cross correlation coefficient with time delay, max (ρ XY [n]) Representing the maximum cross-correlation coefficient ρ with n taking different values XY ，ρ YY Representing template PPG Signal Y NORM The autocorrelation coefficient between the two and the time delay, max (ρ YY [n]) Representing the maximum autocorrelation coefficient ρ of n taking different values YY 。
And obtaining a plurality of first signal quality factors between the plurality of test PPG signals and the template PPG signal according to the template PPG signal, the cross-correlation coefficient between the test PPG signal and the time delay and the template PPG signal, as shown in a formula (5). And determining an average of the plurality of first signal quality factors for each PPG signal as the signal quality factor for each PPG signal.
As an example, assume that a preset contact pressure section is divided into 3 contact pressure sub-sections, namely a contact pressure sub-section a, a contact pressure sub-section B and a contact pressure sub-section C. 7 seconds of PPG signal a is acquired at contact pressure subinterval A, the first 2 seconds of PPG signal is determined as a template PPG signal (defined as a Y vector), and each second of the last 5 seconds of PPG signal is determined as a test PPG signal (defined as an X vector), which are test PPG signal 1, test PPG signal 2, test PPG signal 3, test PPG signal 4 and test PPG signal 5, respectively. And respectively carrying out normalization processing on the template PPG signal, the test PPG signal 1, the test PPG signal 2, the test PPG signal 3, the test PPG signal 4 and the test PPG signal 5, obtaining a plurality of first signal quality factors between the template PPG signal and the test PPG signal 1, the test PPG signal 2 and the test PPG signal 3, and determining the average value of the plurality of first signal quality factors corresponding to the PPG signal a in the contact pressure subinterval A as the signal quality factor of the PPG signal a in the contact pressure subinterval A. It should be noted that, the method for acquiring the signal quality factor corresponding to the PPG signal acquired in the contact pressure subinterval B and the contact pressure subinterval C is the same as the method for acquiring the signal quality factor of the PPG signal a acquired in the contact pressure subinterval a, and will not be described herein.
It should be noted that the larger the signal quality factor value of the PPG signal is, the higher the PPG signal quality is. In some embodiments of the present application, the signal quality factor with the largest value among the signal quality factors of the PPG signals may be determined as the target signal quality factor. And determining the contact pressure subinterval corresponding to the target signal quality factor as a personalized optimal contact pressure interval. For example, among the signal quality factors of the PPG signals, the signal quality factor value corresponding to the PPG signal collected in the contact pressure subinterval 0.5N-0.6N is the largest, and the contact pressure subinterval 0.5N-0.6N is taken as the personalized optimal contact pressure interval of the target object.
It should be noted that, the personalized optimal contact pressure interval of the target object may be determined each time of continuously measuring blood pressure, or may be determined and stored at the time of first measurement, and the stored personalized optimal contact pressure interval is directly called at the time of subsequent measurement. Or, the personalized optimal contact pressure interval of the target object can be redetermined at intervals of preset time so as to adapt to the physical condition of the target object, and the blood pressure measurement precision is further improved.
By implementing the embodiment of the application, before the target object continuously measures the blood pressure, the personalized optimal contact pressure interval of the target object is predetermined so as to adapt to the body conditions of different target objects, and the acquisition quality of the PPG signal during the subsequent blood pressure measurement can be ensured to a certain extent.
Fig. 3 is a schematic diagram of a blood pressure measurement device according to an embodiment of the present application. As shown in fig. 3, the blood pressure measuring apparatus includes: a negative feedback control unit 301 and a blood pressure calculation unit 302. Wherein, the liquid crystal display device comprises a liquid crystal display device,
a negative feedback control unit 301 for determining a personalized optimal contact pressure interval of the target subject and controlling a contact pressure between the photoplethysmography PPG sensor and the skin of the target subject to be within the personalized optimal contact pressure interval.
In some embodiments of the present application, the negative feedback control unit 301 is specifically configured to: acquiring the contact pressure between a PPG sensor acquired by a pressure sensor and the skin of a target object; comparing the contact pressure with a personalized optimal contact pressure interval; and adjusting the contact pressure between the PPG sensor and the target subject skin to be within the personalized optimal contact pressure interval in response to the contact pressure not being within the personalized optimal contact pressure interval.
In some embodiments of the present application, the negative feedback control unit 301 is specifically configured to: in response to the contact pressure being greater than a maximum value within the personalized optimal contact pressure interval, reducing the contact pressure between the PPG sensor and the target subject skin until the contact pressure between the PPG sensor and the target subject skin is within the personalized optimal contact pressure interval; or, in response to the contact pressure being less than a minimum value within the personalized optimal contact pressure interval, increasing the contact pressure between the PPG sensor and the target subject skin until the contact pressure between the PPG sensor and the target subject skin is within the personalized optimal contact pressure interval.
The blood pressure calculating unit 302 is configured to obtain a PPG signal collected by the PPG sensor, and obtain a blood pressure value of the target subject according to the PPG signal.
Optionally, in some embodiments of the present application, as shown in fig. 4, the blood pressure measurement device may further comprise a determination unit 403. Wherein the determining unit 403 is configured to divide a preset contact pressure interval into a plurality of contact pressure sub-intervals; collecting and acquiring PPG signals collected by a PPG sensor under each contact pressure subinterval; determining a signal quality factor of each PPG signal according to the PPG signals collected under each contact pressure subinterval; and determining a personalized optimal contact pressure interval from the plurality of contact pressure subintervals according to the signal quality factor of each PPG signal. Wherein 401 and 402 in fig. 4 have the same function and structure as 301 and 302 in fig. 3.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
According to the blood pressure measuring device, according to the personalized optimal contact pressure interval of the target object, in the process of continuously measuring the blood pressure of the target object, the contact pressure between the PPG sensor and the skin of the target object is controlled, so that the contact pressure is in the personalized optimal contact pressure interval, the quality of the collected PPG signal can be improved, and the blood pressure measuring precision is improved.
In order to implement the above embodiment, the present application further provides an electronic device. Fig. 5 is a block diagram of an electronic device according to an embodiment of the present application. As shown in fig. 5, the electronic device 500 includes: the method for measuring blood pressure according to any of the embodiments described herein is implemented by a photoplethysmography PPG sensor 501, a pressure sensor 502, a memory 503, a processor 504 and a computer program 505 stored on the memory 503 and executable on the processor 504, when the processor 504 executes the computer program 505.
In order to implement the above embodiments, the present application also proposes a non-transitory computer readable storage medium, which when executed by a processor of an electronic device, enables the electronic device to perform the blood pressure measurement method according to any of the above embodiments of the present application.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. A method of measuring blood pressure, comprising the steps of:
acquiring a personalized optimal contact pressure interval of a target object;
controlling a contact pressure between a photoplethysmography, PPG, sensor and the target subject skin to be within the personalized optimal contact pressure interval;
and acquiring a PPG signal acquired by the PPG sensor, and acquiring the blood pressure value of the target object according to the PPG signal.
2. The method of claim 1, wherein the controlling the contact pressure between the photoplethysmography, PPG, sensor and the target subject's skin to be within the personalized optimal contact pressure interval comprises:
acquiring the contact pressure between the PPG sensor acquired by the pressure sensor and the skin of the target object;
comparing the contact pressure with the personalized optimal contact pressure interval;
and adjusting the contact pressure between the PPG sensor and the target subject skin to be within the personalized optimal contact pressure interval in response to the contact pressure not being within the personalized optimal contact pressure interval.
3. The method of claim 2, wherein said adjusting the contact pressure between the PPG sensor and the target subject's skin to be within the personalized optimal contact pressure interval comprises:
in response to the contact pressure being greater than a maximum value within the personalized optimal contact pressure interval, reducing the contact pressure between the PPG sensor and the target subject skin until the contact pressure between the PPG sensor and the target subject skin is within the personalized optimal contact pressure interval; or alternatively, the process may be performed,
and in response to the contact pressure being less than a minimum value within the personalized optimal contact pressure interval, increasing the contact pressure between the PPG sensor and the target subject skin until the contact pressure between the PPG sensor and the target subject skin is within the personalized optimal contact pressure interval.
4. The method according to claim 1, wherein the personalized optimal contact pressure interval is predetermined by:
dividing a preset contact pressure interval into a plurality of contact pressure sub-intervals;
acquiring a PPG signal acquired by the PPG sensor under each contact pressure subinterval;
determining a signal quality factor of each PPG signal according to the PPG signal collected under each contact pressure subinterval;
and determining the personalized optimal contact pressure interval from the contact pressure sub-intervals according to the signal quality factor of each PPG signal.
5. The method of claim 4, wherein said determining a signal quality factor for each of said PPG signals from PPG signals acquired at each of said contact pressure subintervals comprises:
according to the PPG signals collected under each contact pressure subinterval, determining a template PPG signal and a plurality of test PPG signals in each PPG signal;
respectively carrying out normalization processing on the template PPG signal and the plurality of test PPG signals;
obtaining cross-correlation coefficients of the template PPG signal, the test PPG signal and time delay according to the template PPG signal and the plurality of test PPG signals after normalization processing;
acquiring a plurality of first signal quality factors between the plurality of test PPG signals and the template PPG signal according to the template PPG signal, the cross-correlation coefficient of the test PPG signal and the time delay and the template PPG signal;
an average of the plurality of first signal quality factors for each of the PPG signals is determined as a signal quality factor for each of the PPG signals.
6. The method of claim 4 or 5, wherein said determining the personalized optimal contact pressure interval from a plurality of contact pressure subintervals based on a signal quality factor of each of the PPG signals comprises:
determining the signal quality factor with the largest value among the signal quality factors of the PPG signals as a target signal quality factor;
and determining the contact pressure subinterval corresponding to the target signal quality factor as the personalized optimal contact pressure interval.
7. A blood pressure measurement device, comprising:
a negative feedback control unit, configured to determine a personalized optimal contact pressure interval of the target object, and control a contact pressure between a photoplethysmography PPG sensor and a target object skin to be within the personalized optimal contact pressure interval;
and the blood pressure calculation unit is used for acquiring the PPG signal acquired by the PPG sensor and acquiring the blood pressure value of the target object according to the PPG signal.
8. The apparatus of claim 7, further comprising a determination unit, wherein the determination unit is configured to:
dividing a preset contact pressure interval into a plurality of contact pressure sub-intervals;
acquiring PPG signals acquired by the PPG sensor under each contact pressure subinterval;
determining a signal quality factor of each PPG signal according to the PPG signal collected under each contact pressure subinterval;
and determining the personalized optimal contact pressure interval from the contact pressure sub-intervals according to the signal quality factor of each PPG signal.
9. An electronic device, comprising:
a photoplethysmography PPG sensor;
a pressure sensor;
memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 6 when executing the program.
10. A computer readable storage medium, characterized in that instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of any one of claims 1-6.
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| CN202211741112.3A CN116115205A (en) | 2022-12-30 | 2022-12-30 | Blood pressure measuring method, device, electronic equipment and storage medium |
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| CN202211741112.3A CN116115205A (en) | 2022-12-30 | 2022-12-30 | Blood pressure measuring method, device, electronic equipment and storage medium |
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| CN202211741112.3A Pending CN116115205A (en) | 2022-12-30 | 2022-12-30 | Blood pressure measuring method, device, electronic equipment and storage medium |
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