Blood pressure measurement device and electronic device

Abstract

The application provides a blood pressure measuring device and an electronic device. The blood pressure measuring device comprises a main body, a processor, an air bag, an air supply and exhaust device, a driving device, an air pressure sensor and a flow meter. The main body comprises a cavity, the air bag has an air cavity, and the air bag is fixed to one end of the main body; the air supply and exhaust device is connected to the air cavity of the air bag through a first air path; the air pressure sensor is connected to the air cavity of the air bag through a second air path; the flow meter is used for detecting the gas flow value between the air supply and exhaust device and the air bag, or for detecting the gas flow value between the air pressure sensor and the air bag; and the processor can compensate the air pressure value detected by the air pressure sensor according to the gas flow value detected by the flow meter and the corresponding relationship between the gas flow value and the air pressure compensation value, so that the influence of the blood pressure measuring device on the measurement value of the air pressure sensor during the air charging and discharging process can be effectively reduced, and the blood pressure measurement result is relatively accurate.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a blood pressure measuring device and electronic equipment. Background Technology

[0002] Today, people are paying increasing attention to their own and their families' health, making blood pressure measurement particularly important. With the advancement of technology, not only have home blood pressure measurement devices emerged, but blood pressure measurement functions have also begun to be integrated into some wearable devices (such as smartwatches or smart bracelets), making it possible for users to measure their blood pressure anytime, anywhere.

[0003] Current blood pressure measuring devices all place the micro-pump and pressure sensor directly inside the main body of the device. The pressure sensor obtains the user's blood pressure value by measuring the air pressure inside the main body and the air bladder. However, during blood pressure measurement, the micro-pump inflates the air bladder, causing pressure fluctuations within the main body. This results in unstable air pressure detected by the pressure sensor, leading to lower accuracy in the measured blood pressure value.

[0004] Therefore, how to provide a blood pressure measuring device that can meet the accuracy requirements of blood pressure measurement has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a blood pressure measuring device and electronic device to reduce the influence of the internal air pressure of the blood pressure measuring device on its blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0006] In a first aspect, this application provides a blood pressure measuring device, which may include a main body, a processor, an air bladder, an air supply and exhaust device, a drive device, a pressure sensor, and a flow meter. The main body includes a cavity in which various functional modules or devices of the blood pressure measuring device can be housed, such as the aforementioned drive device, processor, air supply and exhaust device, and pressure sensor. The air bladder is fixed to one end of the main body and has an air cavity. The air supply and exhaust device includes an inlet air path and a venting air path, and the air supply and exhaust device is connected to the air cavity of the air bladder via a first air path. The pressure sensor can be connected to the air cavity of the air bladder via a second air path, thereby detecting the air pressure value within the air cavity. The flow meter is used to detect the gas flow rate of the gas flowing between the air supply and exhaust device and the air bladder, or to detect the gas flow rate of the gas flowing between the pressure sensor and the air bladder. The blood pressure measuring device stores a correspondence between gas flow rates and pressure compensation values, for example, stored in the processor. The processor is electrically connected to the pressure sensor, flow meter, and drive unit. The processor obtains a pressure compensation value based on the gas flow rate detected by the flow meter and the stored correspondence between gas flow rate and pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the pressure sensor, and finally, the drive unit is controlled based on the compensated pressure value. The drive unit is electrically connected to the air supply and exhaust system and, under the control of the processor, drives the air supply and exhaust system to perform inflation or deflation.

[0007] When using this blood pressure measuring device, during the inflation and deflation of the air bladder by the air supply and deflation device, the gas flows between the air supply and deflation device, the air bladder, and the pressure sensor. Therefore, the gas flow rate detected by the flow meter can be used to characterize the inflation and deflation volume of the air supply and deflation device. The processor then obtains a pressure compensation value based on the gas flow rate detected by the flow meter and the stored correspondence between the gas flow rate value and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the pressure sensor, resulting in a more accurate pressure value within the air bladder. This reduces the impact of the inflation and deflation process on blood pressure measurement, improving the accuracy of the measurement.

[0008] In this application, to facilitate the flow meter's detection of the gas flow rate between the exhaust / supply device and the air bladder, the flow meter can be installed in the first gas path to detect the gas flow rate in the first gas path. Alternatively, to facilitate the flow meter's detection of the gas flow rate between the exhaust / supply device and the pressure sensor, the flow meter can be installed in the second gas path to detect the gas flow rate in the second gas path.

[0009] In this application, the air supply and exhaust device and the pressure sensor can be directly or indirectly connected to the airbag via corresponding air passages. For example, in one possible implementation of this application, the blood pressure measuring device may further include an air passage cavity disposed within the main body. Furthermore, the air supply and exhaust device can be connected to the air passage cavity via a first air passage, the pressure sensor can be connected to the air passage cavity via a second air passage, and the air passage cavity can be connected to the airbag's air chamber via a third air passage. Thus, the air passages for the air supply and exhaust device and the pressure sensor to connect to the airbag can be merged via the air passage cavity and then connected to the airbag via a single air passage. In this case, only one through-hole for connecting to the airbag needs to be opened on the side wall of the main body, thereby reducing the number of openings on the main body and improving the waterproof performance and structural stability of the blood pressure measuring device.

[0010] It should be noted that, in this application, when the blood pressure measuring device also includes a gas path cavity, a flow meter can also be installed in the third gas path to detect the gas flow rate in the third gas path. Thus, the gas flow rate detected by the flow meter can be either the gas flow rate between the supply / exhaust device and the air bladder, or the gas flow rate between the supply / exhaust device and the pressure sensor.

[0011] In one possible implementation of this application, a connection hole can be provided at the end of the main body to connect the airbag to the main body. Additionally, the airbag has a nozzle that protrudes from one side surface of the airbag towards the main body. This allows the airbag to communicate with the air passage cavity by inserting the nozzle into the connection hole and connecting the third air passage to the nozzle. Similarly, in other possible implementations, the nozzle can be located at the end of the main body, while the connection hole is provided on the airbag; this also allows the connection between the airbag and the main body to be achieved by inserting the nozzle into the connection hole.

[0012] It is worth mentioning that in this application, the airbag and the main body can be detachably connected, allowing the airbag to be disassembled or replaced as needed. Furthermore, in one possible implementation of this application, the blood pressure measuring device may also include a photoplethysmography (PPG) module and an ECG detection module, which can be disposed on the bottom surface of the main body. The airbag can also be fixedly connected to one end of the bottom surface of the main body, thereby integrating multiple measurement functions while making the structure of the blood pressure measuring device more compact.

[0013] In this application, the correspondence between gas flow rate and gas pressure compensation value can be obtained in advance through big data analysis and can be stored in the processor or memory of the blood pressure measuring device before it leaves the factory.

[0014] For example, in this application, the processor can obtain the correspondence between gas flow rate and pressure compensation value in the following manner: First, control the blood pressure measuring device to inflate while the airbag is removed, so that the gas flow rate detected by the flow meter changes; then, obtain multiple pressure values ​​detected by the pressure sensor when the flow meter detects multiple different gas flow rates, and use the obtained multiple pressure values ​​as the pressure compensation values ​​corresponding to the multiple different gas flow rates respectively; finally, establish the correspondence between gas flow rate and pressure compensation value based on the multiple different gas flow rates and their corresponding pressure compensation values.

[0015] For example, the processor can establish a correspondence between gas flow rate values ​​and gas pressure compensation values ​​by interpolation based on multiple different gas flow rate values ​​and their corresponding gas pressure compensation values.

[0016] As can be seen from the above, by storing the pre-established correspondence between gas flow rate and air pressure compensation value, when performing blood pressure detection, the air pressure compensation value can be obtained based on the gas flow rate detected by the flow meter and the stored correspondence between gas flow rate and air pressure compensation value. The obtained air pressure compensation value is then used to compensate for the air pressure value detected by the air pressure sensor, resulting in a more accurate air pressure value inside the airbag.

[0017] The blood pressure measurement process of the blood pressure measuring device may include: controlling the drive device to inflate the air bladder using the air supply and exhaust device; then reading the air pressure value detected by the pressure sensor and the gas flow rate value detected by the flow meter; obtaining the pressure compensation value based on the gas flow rate value detected by the flow meter and the stored correspondence between the gas flow rate value and the pressure compensation value; compensating the air pressure value detected by the pressure sensor based on the obtained pressure compensation value, specifically by subtracting the obtained pressure compensation value from the air pressure value detected by the pressure sensor to obtain the compensated air pressure value; and then controlling the operating parameters of the drive circuit (e.g., voltage, current, frequency, etc.) to inflate the air bladder based on the compensated air pressure value. This process is executed at least once, for example, once, twice, three times, or four times, to ensure that the compensated air pressure value meets the requirements of the blood pressure measurement's boost curve, thereby completing the blood pressure measurement.

[0018] Secondly, this application also provides another blood pressure measuring device, which may include a main body, a processor, an air bladder, an air supply and exhaust device, a drive device, a first pressure sensor, and a second pressure sensor. The main body includes a cavity in which the various functional modules or devices of the blood pressure measuring device can be housed, such as the aforementioned drive device, processor, air supply and exhaust device, first pressure sensor, and second pressure sensor. The air bladder is fixed to one end of the main body and has an air cavity. The air supply and exhaust device includes an inlet air path and a venting air path, and the air supply and exhaust device is connected to the air cavity of the air bladder via the first air path. The first pressure sensor can be connected to the air cavity of the air bladder via the second air path, thereby detecting the air pressure value within the air cavity. The second pressure sensor is used to detect the air pressure value within the cavity. The blood pressure measuring device stores a correspondence between gas flow rates and pressure compensation values, for example, stored in a processor or memory. The processor is electrically connected to the first pressure sensor, the second pressure sensor, and the drive device. The processor can obtain a pressure compensation value based on the pressure value detected by the second pressure sensor and the stored correspondence between the cavity pressure value and the pressure compensation value. This compensation value can then be used to compensate for the pressure value detected by the first pressure sensor, and the drive device can be controlled based on the compensated pressure value. The drive device is electrically connected to the air supply and exhaust system and is used to drive the air supply and exhaust system to perform inflation and deflation under the control of the processor.

[0019] In this blood pressure measuring device, when the air supply and deflation device inflates and deflates the air bladder, a second pressure sensor detects the air pressure inside the chamber. The processor then obtains a pressure compensation value based on the pressure value detected by the second pressure sensor and the stored correspondence between chamber air pressure values ​​and pressure compensation values. This compensation value is then used to compensate for the pressure value detected by the first pressure sensor, resulting in a more accurate air pressure value inside the air bladder. This reduces the impact of the inflation and deflation process on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0020] In this application, since the gas fluctuations in the air chamber are generated by the gas supply and exhaust device, the closer the area is to the gas supply and exhaust device, the greater the gas pressure fluctuations are generated. Therefore, the second gas pressure sensor can be set close to the gas supply and exhaust device. The closer the second gas pressure sensor is to the gas supply and exhaust device, the more accurate the measurement results are.

[0021] In this application, the air supply and exhaust device and the pressure sensor can be directly or indirectly connected to the airbag via corresponding air passages. For example, in one possible implementation of this application, the blood pressure measuring device may further include an air passage cavity disposed within the main body. Furthermore, the air supply and exhaust device can be connected to the air passage cavity via a first air passage, the first pressure sensor can be connected to the air passage cavity via a second air passage, and the air passage cavity can be connected to the airbag's air chamber via a third air passage. Thus, the air passages for the air supply and exhaust device and the first pressure sensor to connect to the airbag can be merged via the air passage cavity and then connected to the airbag via a single air passage. In this case, only one through-hole for connecting to the airbag needs to be opened on the side wall of the main body, thereby reducing the number of openings on the main body and improving the waterproof performance and structural stability of the blood pressure measuring device.

[0022] For example, the correspondence between the chamber pressure value and the pressure compensation value can also be obtained in advance through big data analysis and stored in the processor of the blood pressure measuring device. The correspondence between the chamber pressure value and the pressure compensation value can be established in advance before the blood pressure measuring device leaves the factory.

[0023] In one feasible implementation, the processor can obtain the correspondence between the cavity air pressure value and the air pressure compensation value as follows: First, the blood pressure measuring device is inflated with the airbag removed, causing a change in the first air pressure value detected by the second air pressure sensor. Then, multiple second air pressure values ​​detected by the second air pressure sensor at multiple different first air pressure values ​​are acquired, and these acquired second air pressure values ​​are used as the air pressure compensation values ​​corresponding to the different first air pressure values. Finally, based on the multiple different first air pressure values ​​and their corresponding air pressure compensation values, a correspondence between the cavity air pressure value and the air pressure compensation value is established.

[0024] For example, the processor can establish the correspondence between cavity air pressure values ​​and air pressure compensation values ​​by interpolation based on multiple different first air pressure values ​​and their corresponding air pressure compensation values.

[0025] As can be seen from the above, the pre-established correspondence between the cavity air pressure value and the air pressure compensation value is stored. In this way, when blood pressure is measured, the air pressure compensation value can be obtained based on the air pressure value detected by the second air pressure sensor and the stored correspondence between the cavity air pressure value and the air pressure compensation value. The obtained air pressure compensation value is then used to compensate for the air pressure value detected by the first air pressure sensor, so as to obtain a more accurate air pressure value inside the airbag. The blood pressure measurement process of the blood pressure measuring device may include: controlling the drive device to inflate the air bladder using the air supply and exhaust device; then reading the air pressure values ​​detected by the first and second pressure sensors; obtaining a pressure compensation value based on the air pressure value detected by the second pressure sensor and the stored correspondence between the cavity air pressure value and the pressure compensation value; compensating the air pressure value detected by the first pressure sensor based on the obtained pressure compensation value, specifically by subtracting the obtained pressure compensation value from the air pressure value detected by the first pressure sensor to obtain the compensated air pressure value; and then controlling the operating parameters of the drive circuit (e.g., voltage, current, frequency, etc.) to inflate the air bladder based on the compensated air pressure value. This process is executed at least once, for example, once, twice, three times, or four times, to ensure that the compensated air pressure value meets the requirements of the blood pressure measurement's boost curve, thereby completing the blood pressure measurement.

[0026] Thirdly, this application also provides another blood pressure measuring device, which may include a main body, a processor, an air bladder, an air supply and exhaust device, a drive device, and a pressure sensor. The main body includes a cavity in which the various functional modules or devices of the blood pressure measuring device can be housed, such as the aforementioned drive device, processor, air supply and exhaust device, first pressure sensor, and second pressure sensor. The air bladder is fixed to one end of the main body and has an air cavity. The air supply and exhaust device includes an intake air path and a venting air path, and the air supply and exhaust device is connected to the air cavity of the air bladder through the first air path. The pressure sensor can be connected to the air cavity of the air bladder through the second air path, thereby detecting the air pressure value within the air cavity. The blood pressure measuring device stores a correspondence between drive states and pressure compensation values, for example, stored in the processor. The processor is electrically connected to the pressure sensor and the drive unit. The processor obtains the pressure compensation value based on the drive unit's driving state and the stored correspondence between the driving state and the pressure compensation value. It then compensates for the pressure value detected by the pressure sensor based on the obtained compensation value and controls the drive unit according to the compensated pressure value. The drive unit is electrically connected to the air supply and exhaust system and, under the control of the processor, drives the air supply and exhaust system to perform inflation and deflation.

[0027] In this blood pressure measuring device, when the air supply and deflation device inflates and deflates the airbag, the processor can obtain a pressure compensation value based on the driving state of the drive device and the stored correspondence between the driving state and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the pressure sensor, resulting in a more accurate pressure value inside the airbag. This reduces the impact of the inflation and deflation process on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0028] It should be noted that the drive state may include at least one parameter related to power supply, such as drive voltage, drive current, and duty cycle.

[0029] It is worth mentioning that an air passage cavity can be set in the blood pressure measuring device so that the air supply and exhaust device can be connected to the air passage cavity through the first air passage, the first air pressure sensor can be connected to the air passage cavity through the second air passage, and the air passage cavity can be connected to the airbag through the third air passage, so as to realize the connection of a single air nozzle between the main body and the airbag.

[0030] In this application, the correspondence between the driving state and the air pressure compensation value can be obtained in advance through big data learning and analysis, and stored in advance in the processor of the blood pressure measuring device.

[0031] For example, in this application, the processor can obtain the correspondence between the driving state and the air pressure compensation value in the following manner: controlling the blood pressure measuring device to inflate in multiple different driving states while the airbag is removed; then acquiring multiple air pressure values ​​detected by the air pressure sensor when the blood pressure measuring device is driven in multiple different driving states, and using the acquired multiple air pressure values ​​as the air pressure compensation values ​​corresponding to the multiple different driving states respectively. Finally, based on the multiple different driving states and their corresponding air pressure compensation values, a correspondence between the driving state and the air pressure compensation value is established.

[0032] For example, the processor can establish a correspondence between driving states and air pressure compensation values ​​by interpolation based on multiple different driving states and their corresponding air pressure compensation values.

[0033] As can be seen from the above, it is precisely by storing the pre-established correspondence between the driving state and the air pressure compensation value that, when performing blood pressure detection, the air pressure compensation value can be obtained based on the driving state and the stored correspondence between the driving state and the air pressure compensation value. The obtained air pressure compensation value is then used to compensate for the air pressure value detected by the air pressure sensor, resulting in a more accurate air pressure value inside the airbag.

[0034] The blood pressure measurement process of the blood pressure measuring device may include: controlling the drive device to inflate the air bladder using the air supply and exhaust device, reading the air pressure value detected by the pressure sensor, obtaining the air pressure compensation value based on the drive device's drive state and the stored correspondence between drive state and air pressure compensation value, compensating the air pressure value detected by the pressure sensor based on the obtained air pressure compensation value (specifically, subtracting the obtained air pressure compensation value from the air pressure value detected by the pressure sensor to obtain the compensated air pressure value), and then controlling the operating parameters of the drive circuit (e.g., voltage, current, frequency, etc.) to inflate the air bladder using the compensated air pressure value. This process is executed at least once, for example, once, twice, three times, or four times, to ensure that the compensated air pressure value meets the requirements of the blood pressure measurement's boost curve, thereby completing the blood pressure measurement.

[0035] Fourthly, this application also provides an electronic device that may include a blood pressure measuring device as provided in any of the embodiments of the first to third aspects described above.

[0036] The technical effects that can be achieved in the fourth aspect mentioned above can be described with reference to the technical effects that can be achieved by any of the possible designs in the first to third aspects mentioned above, and will not be repeated here. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a blood pressure measuring device provided in one embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the frame structure of an existing blood pressure measuring device provided in one embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in one embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0044] Figure 8 This is a schematic flowchart of a blood pressure measurement method provided in one embodiment of this application;

[0045] Figure 9 This is a schematic diagram of a process for establishing the correspondence between gas flow rate values ​​and gas pressure compensation values ​​according to one embodiment of this application;

[0046] Figure 10 A schematic diagram showing the relationship between volumetric flow rate and air pressure compensation value according to one embodiment of this application;

[0047] Figure 11 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0048] Figure 12 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0049] Figure 13 A schematic flowchart illustrating a blood pressure measurement method according to another embodiment of this application;

[0050] Figure 14 This is a schematic diagram of a process for establishing the correspondence between cavity air pressure value and air pressure compensation value according to an embodiment of this application;

[0051] Figure 15 This is a schematic diagram showing the correspondence between cavity air pressure value and air pressure compensation value according to one embodiment of this application;

[0052] Figure 16 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0053] Figure 17 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in another embodiment of this application;

[0054] Figure 18 A schematic flowchart illustrating a blood pressure measurement method according to another embodiment of this application;

[0055] Figure 19 This is a schematic diagram of a process for establishing the correspondence between driving states and air pressure compensation values ​​according to one embodiment of this application;

[0056] Figure 20 This is a schematic diagram showing the relationship between driving power and air pressure compensation value according to one embodiment of this application.

[0057] Figure label:

[0058] 1. Main body; 101. Cavities;

[0059] 102 PPG module; 103 ECG detection module;

[0060] 2. Airbags; 3. Wristbands;

[0061] 4. Air supply and exhaust system; 401. Air intake passage;

[0062] 402 Vent line; 5 Pressure sensor;

[0063] 5a First barometric pressure sensor; 5b Second barometric pressure sensor;

[0064] 6. Drive unit; 7. Processor;

[0065] 81 First airway; 82 Second airway;

[0066] 83 Third air passage; 9 Flow meter;

[0067] 10. Airway cavity. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0069] To facilitate understanding of the blood pressure measuring device provided in this application embodiment, its application scenarios are first described below. This blood pressure measuring device can be, but is not limited to, a large device for measuring blood pressure, such as a medical or household device, or a portable electronic device with blood pressure measuring function, such as a smartwatch or smart bracelet. Taking a smartwatch as an example, it can be worn on the user's wrist to monitor the user's blood pressure and other vital signs at any time, enabling prediction of the user's physical condition and effectively preventing dangerous secondary complications such as stroke caused by hypertension.

[0070] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a smartwatch with blood pressure measurement function according to one embodiment of this application. A blood pressure measuring device with blood pressure detection function generally includes a main body 1 and an airbag 2, the airbag 2 being fixed to one end of the main body 1. For example, the airbag 2 can be fixed to one end face of the bottom surface of the main body 1. In this application, the bottom surface of the main body 1 refers to the surface of the main body 1 that directly contacts the wrist when the smartwatch is worn on the wrist. Additionally, the blood pressure measuring device may also include a wristband 3, such as... Figure 1 As shown, the air bladder 2 can be located on the side of the wristband 3 facing the user's wrist. This allows the air bladder 2 to be pressed against the wrist and fitted snugly when the wristband 3 is wrapped around the user's wrist, facilitating blood pressure measurement. It is understood that the air bladder 2 and wristband 3 can be fixed together, but not limited to, by snap-fitting, adhesive bonding, or riveting, to reduce friction caused by movement between the air bladder 2 and wristband 3, thereby reducing the risk of air bladder wear and extending the lifespan of the blood pressure measuring device.

[0071] In addition to the aforementioned structure, smartwatches with blood pressure measurement capabilities typically also include a photoplethysmograph (PPG) module. The PPG module 102 can be located on the bottom surface of the main body 1, or it can be positioned in the middle area of ​​the bottom surface of the main body 1 (see [reference]). Figure 1 The circular area in the middle of the bottom surface of the main body 1 (as shown) is designed to improve the detection accuracy of the PPG module 102. Since the PPG module 102 can continuously measure the human heart rate, by simultaneously setting the airbag 2 and the PPG module 102 on the smartwatch, the function of single blood pressure measurement using the airbag 2 can be integrated with the continuous heart rate measurement function of the PPG module 102, and the problem of continuous blood pressure measurement can be solved through precise algorithm calculation.

[0072] You can continue to refer to Figure 1 The smartwatch in this embodiment can also be equipped with an electrocardiogram (ECG) detection module 103. This ECG detection module 103 can be located on the bottom surface of the main body 1. Alternatively, the ECG detection module 103 can be located in the middle area of ​​the main body 1, and exemplarily, it can be located around the PPG module 102 (see [link]). Figure 1 The two arc-shaped areas in the middle of the bottom surface of the main body 1 shown in the figure enable the electrocardiogram detection function of the smartwatch.

[0073] Can be referred to together Figure 2 , Figure 2 A schematic diagram of the framework structure of a conventional blood pressure measuring device is shown. The main body 1 has a cavity 101, within which the main functional modules and components of the blood pressure measuring device (such as processors and sensors) are housed. These include, for example, an air supply / exhaust device 4, a pressure sensor 5, a drive device 6, and a processor 7. One end of an airbag 2 is connected to the air supply / exhaust device 4 and the pressure sensor 5 via an air nozzle. The airbag 2 can be worn around the user's wrist. When using this blood pressure measuring device, the processor 7 controls the drive device 6 to inflate and deflate the airbag 2 via the air supply / exhaust device 4. The pressure sensor 5 detects the pressure changes in the airbag 2 during this inflation / deflation process. Thus, an algorithm can be used to calculate the user's blood pressure value from the detected pressure values.

[0074] As can be understood from the above description of the blood pressure measurement process of the blood pressure measuring device, since the air supply and exhaust device 4 is located in the cavity 101 of the main body 1, the air pressure fluctuation in the cavity 101 of the main body 1 will be caused during the inflation and deflation of the airbag 2 by the air supply and exhaust device 4. This air pressure fluctuation will cause the air pressure value detected by the air pressure sensor 5 to be different from the actual air pressure value inside the airbag 2, and generally the air pressure value detected by the air pressure sensor 5 is greater than the actual air pressure value inside the airbag 2.

[0075] Based on this, embodiments of this application provide a blood pressure measuring device to reduce the influence of air pressure within the cavity 101 of the main body 1 of the blood pressure measuring device on its blood pressure measurement, thereby improving the accuracy of blood pressure measurement. For ease of understanding, the specific structure of the blood pressure measuring device will be described in detail in the following embodiments of this application, using a smartwatch as an example.

[0076] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0077] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0078] Reference Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the frame structure of a blood pressure measuring device provided in one embodiment of this application. Figure 4This is a schematic diagram of the frame structure of a blood pressure measuring device according to another embodiment of this application. In this embodiment of the application, the blood pressure measuring device may include a main body 1 and an air bladder 2. The main body 1 has multiple sidewalls that are connected to form a cavity 101, within which the main functional modules and devices of the blood pressure measuring device may be disposed. The air bladder 2 may be fixed to one sidewall of the main body 1, and the air bladder 2 has an air chamber.

[0079] You can continue to refer to Figure 3 and Figure 4 In this embodiment of the application, the blood pressure measuring device may further include an air supply and exhaust device 4 and a pressure sensor 5, both of which are disposed within the cavity 101 of the main body 1. The air supply and exhaust device 4 includes an inlet air passage 401 and a venting air passage 402, both of which are connected to the cavity 101 of the main body 1. Furthermore, the air supply and exhaust device 4 is also connected to the air chamber of the airbag 2 via a first air passage 81. Thus, gas within the cavity 101 of the main body 1 can enter the air supply and exhaust device 4 through the inlet air passage 401 and then enter the airbag 2 through the first air passage 81, thereby inflating the airbag 2. Conversely, when gas in the airbag 2 needs to be released, the air supply and exhaust device 4 extracts gas from the airbag 2 through the first air passage 81 and discharges it into the cavity 101 of the main body 1 via the venting air passage 402.

[0080] In addition, since the air intake passage 401 and the air exhaust passage 402 of the air supply and exhaust device 4 do not work at the same time, in a possible embodiment of this application, the air intake passage 401 and the air exhaust passage 402 can be combined, that is, only one air passage is provided on the air supply and exhaust device 4. The air supply and exhaust device 4 can inflate the airbag 2 through the air passage and can also extract the gas in the airbag 2 through the air passage, thereby simplifying the structure of the blood pressure measuring device.

[0081] In this application, the specific structure of the air supply and exhaust device 4 is not limited. For example, the air supply and exhaust device 4 can be an air pump, the volume of which can be set according to the air supply and exhaust requirements of the airbag 2 of the blood pressure measuring device and the size of the cavity 101 of the main body 1. Considering that current smartwatches with blood pressure measuring functions have a small main body 1, the space of its cavity 101 is also small; therefore, the volume of the air pump installed in the smartwatch is also small. In some possible embodiments of this application, the air pump can be fixed to a structural component (not shown in the figure), and the air pump can be installed on the main body 1 by fixing the structural component to the main body 1. The material of the structural component can be, but is not limited to, metal or a high-strength non-metal, so that it can reliably support the air pump, thereby improving the structural reliability of the air pump. In this application, the method of fixing the air pump to the structural component is not limited. For example, it can be fixed by adhesive application or threaded connection. In addition, in some embodiments of this application, adhesive can be applied around the air pump to seal it, thereby improving the structural stability of the air pump.

[0082] You can continue to refer to Figure 3 and Figure 4 The blood pressure measuring device may further include a drive unit 6 and a processor 7, with the processor 7 electrically connected to both the drive unit 6 and the pressure sensor 5. In this application, the positions of the drive unit 6 and the processor 7 are not limited. For example, the drive unit 6 and the processor 7 may be disposed within the cavity 101 of the main body 1. The processor 7 controls the pressure sensor 5 and the drive unit 6. The drive unit 6, under the control of the processor 7, provides driving force for the inflation and deflation process of the air supply and deflation device 4. In this application, the drive unit 6 is not specifically limited; for example, it may be a motor, etc. The pressure sensor 5 is used to detect air pressure under the control of the processor 7. In this application, the pressure sensor 5 is not specifically limited. In this application, since the air supply and exhaust device 4 is located inside the cavity 101 of the main body 1, the air pressure inside the cavity 101 of the main body 1 will fluctuate during the inflation and deflation of the airbag 2 by the air supply and exhaust device 4. This air pressure fluctuation is related to the inflation and deflation volume of the air supply and exhaust device 4. If the change in the air pressure value of the air pressure sensor 5 caused by the inflation and deflation volume can be obtained, then the error compensation of the air pressure value detected by the air pressure sensor 5 can be performed, thereby reducing the influence of the air pressure inside the cavity 101 of the main body 1 of the blood pressure measuring device on its blood pressure measurement and improving the accuracy of blood pressure measurement.

[0083] Therefore, it can continue to be referenced. Figure 3 and Figure 4The blood pressure measuring device may also include a flow meter 9. The flow meter 9 is used to detect the gas flow rate of the gas flowing between the air supply / exhaust device 4 and the air bladder 2, or to detect the gas flow rate of the gas flowing between the pressure sensor 5 and the air bladder 2. The blood pressure measuring device stores a correspondence between gas flow rates and pressure compensation values. For example, this correspondence can be stored in the processor 7 or a memory. The processor 7 can obtain the corresponding pressure compensation value based on the gas flow rate detected by the flow meter 9 and the stored correspondence between gas flow rates and pressure compensation values. This compensation value is then used to compensate the pressure value detected by the pressure sensor 5, and the drive device 6 can be controlled based on the compensated pressure value. Under the control of the processor 7, the drive device 6 drives the air supply / exhaust device 4 to inflate or deflate; that is, the drive device 6 can provide driving force for the inflating / deflating process of the air supply / exhaust device 4.

[0084] Therefore, in this application, when the air supply and exhaust device 4 inflates and deflates the airbag 2, the gas flows between the air supply and exhaust device 4, the airbag 2, and the pressure sensor 5. Thus, the gas flow rate detected by the flow meter 9 can characterize the inflation and deflation volume of the air supply and exhaust device 4. The processor 7 then obtains the pressure compensation value based on the gas flow rate detected by the flow meter 9 and the stored correspondence between the gas flow rate value and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the pressure sensor 5, resulting in a more accurate pressure value inside the airbag 2. This reduces the impact of the inflation and deflation process on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0085] In this application, to facilitate the flow meter 9 in detecting the gas flow rate of the gas flowing between the supply and exhaust device 4 and the air bag 2, see, for example, [link to relevant documentation]. Figure 3 The flow meter 9 can be installed on the first gas path 81 to detect the gas flow rate in the first gas path 81. Alternatively, in this application, to facilitate the flow meter 9 in detecting the gas flow rate of the gas flowing between the supply and exhaust device 4 and the pressure sensor 5, for example, a [participating device] can be installed. Figure 4 The flow meter 9 can be installed on the second gas path 82 to detect the gas flow rate in the second gas path 82.

[0086] In this application, since the gas fluctuation in the gas chamber is generated by the gas supply and exhaust device 4, the closer the area is to the gas supply and exhaust device 4, the greater the gas pressure fluctuation is. Therefore, setting the flow meter 9 on the first gas path 81, which is closer to the gas supply and exhaust device 4, can improve the measurement accuracy compared to setting it on the second gas path 82.

[0087] In the various embodiments of this application, the specific arrangement of each air passage is not limited. It can be arranged in a straight line or in a curved manner, and can be adapted to the internal space of the blood pressure measuring device. It is understood that, for the sake of clarity, each air passage is shown as a straight line in the schematic diagrams of this application.

[0088] Reference Figure 5 and Figure 6 , Figure 5 A schematic diagram of the frame structure of a blood pressure measuring device provided for another possible embodiment of this application. Figure 6 A schematic diagram of the frame structure of a blood pressure measuring device provided for another possible embodiment of this application. Figure 5 and Figure 6 The blood pressure measuring device shown in the embodiment is the same as described above. Figure 3 and Figure 4 The main difference in the illustrated embodiments is that: Figure 5 and Figure 6 In the illustrated embodiment, the blood pressure measuring device further includes an air passage cavity 10, which is disposed within the cavity 101 of the main body 1. Furthermore, the air passage cavity 10 can be, but is not limited to, fixed to the side wall of the main body 1 facing the cavity 101 by means of adhesive bonding or threaded connection, to improve the structural stability of the air passage cavity 10.

[0089] Based on the aforementioned changes to the structure of the blood pressure measuring device, the connection method between the pressure sensor 5, the air supply and exhaust device 4, and the airbag 2 in this embodiment of the application has also been adapted. For specific implementation, please refer to... Figure 5 and Figure 6 The air supply and exhaust device 4 is connected to the air passage cavity 10 via the first air passage 81, and the air pressure sensor 5 is connected to the air passage cavity 10 via the second air passage 82. Thus, the first air passage 81 and the second air passage 82 can be connected through the air passage cavity 10. Additionally, the air passage cavity 10 can be connected to the air chamber of the airbag 2 via the third air passage 83. Figure 5 and Figure 6 Other structures of the blood pressure measuring device in the illustrated embodiment can be configured with reference to any of the above embodiments, and will not be described in detail here.

[0090] Using the blood pressure measuring device provided in this embodiment of the application, by adding an air passage cavity 10, the air intake passage 401 and the air release passage 402 of the air supply and exhaust device 4 can be connected to the air chamber of the airbag 2 through the air passage cavity 10. When the air supply and exhaust device 4 is working, it can draw gas from the cavity 101 of the main body 1 into the air passage cavity 10, and then into the air chamber of the airbag 2. In addition, the air supply and exhaust device 4 can also discharge the gas in the airbag 2 by discharging the gas in the air passage cavity 10 through the air release passage 402.

[0091] In one possible implementation of this application, a connection hole can be provided at the end of the main body to connect the airbag to the main body. Additionally, the airbag has a nozzle that protrudes from one side surface of the airbag towards the main body. In this way, the airbag can be inserted into the connection hole via the nozzle, and a third air passage can be connected to the nozzle to achieve communication between the airbag and the air passage cavity. Similarly, in other possible implementations, the nozzle can be located at the end of the main body, while the connection hole is provided on the airbag; this also allows the connection between the airbag and the main body to be achieved by inserting the nozzle into the connection hole.

[0092] It is worth mentioning that in this application, the airbag and the main body can be detachably connected, allowing the airbag to be disassembled or replaced as needed. Furthermore, in one possible implementation of this application, the blood pressure measuring device may also include a photoplethysmography (PPG) module and an ECG detection module, which can be disposed on the bottom surface of the main body. The airbag can also be fixedly connected to one end of the bottom surface of the main body, thereby integrating multiple measurement functions while making the structure of the blood pressure measuring device more compact.

[0093] See Figure 7 , Figure 7 This is a schematic diagram of the frame structure of a blood pressure measuring device provided for another possible embodiment of this application. When the blood pressure measuring device also includes a gas passage cavity 10, a flow meter 9 can also be installed on the third gas passage 83 to detect the gas flow rate in the third gas passage 83. Thus, the gas flow rate detected by the flow meter 9 can be either the gas flow rate of the gas flowing between the exhaust device 4 and the air bladder 2, or the gas flow rate of the gas flowing between the exhaust device 4 and the pressure sensor 5. It is worth mentioning that... Figure 7 The blood pressure measuring device shown in the embodiment is the same as described above. Figure 5 and Figure 6 Compared to the blood pressure measuring device shown in the embodiment, only the position of the flow meter 9 is different; the working principle is the same. Figure 7 Other structures of the blood pressure measuring device in the illustrated embodiment can be configured with reference to any of the above embodiments.

[0094] See Figure 8 , Figure 8 This application discloses a method for measuring blood pressure using a blood pressure measuring device. The device mainly includes a main body, an air bladder, a pressure sensor, and a flow meter. The main body includes a cavity, the pressure sensor is located within the cavity, the air bladder has an air chamber connected to the cavity, the flow meter detects the gas flow rate during inflation and deflation, and the pressure sensor detects the pressure within the air chamber. Specific implementations of this blood pressure measuring device can be found above. Figures 3 to 7The blood pressure measuring device shown in the embodiment will not be described in detail here. Figure 8 As shown, the blood pressure measurement method of this blood pressure measuring device may include the following steps:

[0095] S101. Obtain the gas flow rate value detected by the flow meter and the gas pressure value detected by the pressure sensor when the blood pressure measuring device is being charged and deflated.

[0096] S102. Obtain the corresponding gas pressure compensation value based on the gas flow rate value and the correspondence between the stored gas flow rate value and the gas pressure compensation value.

[0097] S103. Compensate the air pressure value based on the obtained air pressure compensation value.

[0098] Therefore, when measuring blood pressure, the pressure compensation value can be obtained based on the gas flow rate detected by the flow meter and the correspondence between the stored gas flow rate value and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the pressure sensor, resulting in a more accurate pressure value within the air bladder. This reduces the influence of the internal pressure on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0099] In this application, the correspondence between gas flow rate and gas pressure compensation value can be obtained in advance through big data analysis and can be stored in the processor or memory of the blood pressure measuring device before it leaves the factory.

[0100] For example, such as Figure 9 As shown, the processor can obtain the correspondence between the gas flow rate value and the gas pressure compensation value in the following way: Step S201, control the blood pressure measuring device to inflate when the airbag is removed so that the gas flow rate value detected by the flow meter changes.

[0101] Removing the air bladder from the blood pressure measuring device allows the main body cavity to be connected to the outside atmosphere, thus ensuring that the air pressure value detected by the pressure sensor is not affected by the air pressure inside the air bladder cavity, but is mainly generated by the airflow fluctuations inside the cavity.

[0102] In practice, the drive device can be controlled to change the gas flow rate detected by the flow meter from the minimum value to the maximum value.

[0103] Step S202: Obtain multiple pressure values ​​detected by the pressure sensor when the flow meter detects multiple different gas flow values, and use the obtained multiple pressure values ​​as the pressure compensation values ​​corresponding to the multiple different gas flow values ​​respectively.

[0104] The multiple different gas flow rates can be selected from zero to the maximum gas flow rate. For example, if the maximum gas flow rate detected by the flow meter is 100 ml / min, multiple gas flow rates can be selected between 0 and 100 ml / min. For instance, the selected gas flow rates can be evenly distributed, such as 0 ml / min, 10 ml / min, 20 ml / min, 30 ml / min, 40 ml / min, 50 ml / min, 60 ml / min, 70 ml / min, 80 ml / min, 90 ml / min, and 100 ml / min. It is understood that the more gas flow rates selected, the more accurate the correspondence between the subsequent gas flow rate and the pressure compensation value will be.

[0105] In practical implementation, when the gas flow rate detected by the flow meter is q1 (e.g., 0 ml / min), the gas pressure value Δp1 detected by the pressure sensor can be obtained, and Δp1 can be used as the gas pressure compensation value corresponding to q1. For example, Δp1 can be recorded and stored in memory for later use. Then, the gas flow rate is increased until the gas flow rate detected by the flow meter is q2 (e.g., 10 ml / min), and the gas pressure value Δp2 detected by the pressure sensor is obtained, and Δp2 can be used as the gas pressure compensation value corresponding to q2. For example, Δp2 can be recorded and stored in memory for later use. Then, the gas flow rate is increased until the gas flow rate detected by the flow meter is q3 (e.g., 20 ml / min), and the gas pressure value Δp3 detected by the pressure sensor is obtained, and Δp3 can be used as the gas pressure compensation value corresponding to q3. For example, Δp3 can be recorded and stored in memory for later use. Similarly, select N different gas flow rates from 0 to the maximum gas flow rate: q1, q2, q3, q4, ..., qN, and obtain the corresponding pressure compensation values ​​Δp1, Δp2, Δp3, Δp4, ..., ΔpN. Among them, qN can be the maximum gas flow rate value.

[0106] Step S203: Based on multiple different gas flow rates and their corresponding pressure compensation values, establish the correspondence between gas flow rates and pressure compensation values.

[0107] For example, the processor can establish a correspondence between gas flow rate values ​​and gas pressure compensation values ​​by interpolation based on multiple different gas flow rate values ​​and their corresponding gas pressure compensation values.

[0108] See Figure 10For a gas flow rate value q(x) located between q1 and q2, q2 and q3, ..., qN-1 and qN, for example, if q(x) is located between qi and qj, then the corresponding gas pressure compensation value Δp(x) can be determined according to the formula Δp(x)=Δpi+[q(x)-qi](Δpj-Δpi) / (qj-qi), where i can take any number from 1 to N-1, and j=1+1.

[0109] In practical implementation, the pressure compensation value Δp(x) corresponding to the gas flow rate q(x) located between 0 and q1, q1 and q2, q2 and q3, ..., qN-1 and qN can also be determined in other ways. For example, if q(x) is located between qi and qj, then the pressure compensation value Δp(x) corresponding to q(x) is (Δpj - Δpi) / 2. Here, i can take any number from 1 to N-1, and j = 1 + 1.

[0110] As described above, by storing the pre-established correspondence between gas flow rate values ​​and pressure compensation values, the pressure compensation value can be obtained during blood pressure measurement based on the gas flow rate value detected by the flow meter and the stored correspondence. This compensation value is then used to compensate for the pressure value detected by the pressure sensor, resulting in a more accurate pressure value within the air bladder. The blood pressure measurement process of the device can include: controlling the drive device to inflate the air bladder using the air supply and exhaust device; reading the pressure value detected by the pressure sensor and the gas flow rate value detected by the flow meter; obtaining the pressure compensation value based on the gas flow rate value detected by the flow meter and the stored correspondence; compensating for the pressure value detected by the pressure sensor using the obtained compensation value (specifically, subtracting the compensation value from the pressure value detected by the pressure sensor to obtain the compensated pressure value); and finally, controlling the operating parameters of the drive circuit (e.g., voltage, current, frequency, etc.) based on the compensated pressure value to inflate the air bladder using the air supply and exhaust device. Perform the above procedure at least once, such as once, twice, three times, or four times, so that the compensated air pressure value meets the requirements of the blood pressure measurement curve, thereby completing the blood pressure measurement.

[0111] It should be noted that this application is not limited to using a flow meter to directly detect the gas flow rate during inflation of the blood pressure measuring device. Other sensors that can indirectly detect gas flow rate can also be used instead of the flow meter, such as a pressure sensor. See the following embodiments for details.

[0112] Reference Figure 11 , Figure 11This is a schematic diagram of a blood pressure measuring device according to another embodiment of this application. The structure of the blood pressure measuring device in this embodiment differs from any of the above embodiments, mainly in that: the blood pressure measuring device does not include a flow meter, but includes two pressure sensors, namely a first pressure sensor 5a and a second pressure sensor 5b. In this blood pressure measuring device, both the first pressure sensor 5a and the second pressure sensor 5b are disposed within the cavity 101. The first pressure sensor 5a is connected to the air chamber of the airbag 2 via the second air passage 82 and is used to detect the air pressure value within the air chamber of the airbag. The second pressure sensor 5b is used to detect the air pressure value within the cavity 101 of the main body 1. The processor 7 is electrically connected to the first pressure sensor 5a, the second pressure sensor 5b, and the drive device 6. It is used to obtain the corresponding air pressure compensation value based on the air pressure value detected by the second pressure sensor 5b and the correspondence between the cavity air pressure value and the air pressure compensation value stored in the blood pressure measuring device. Then, it compensates the air pressure value detected by the first pressure sensor 5a based on the obtained air pressure compensation value and controls the drive device 6 based on the compensated air pressure value. The drive device 6 is electrically connected to the air supply and exhaust device 4 and is used to drive the air supply and exhaust device 4 to inflate or deflate under the control of the processor 7.

[0113] In this blood pressure measuring device, when the air supply and deflation device 4 inflates and deflates the airbag 2, the second pressure sensor 5b detects the air pressure value inside the cavity 101. The processor 7 then obtains a pressure compensation value based on the pressure value detected by the second pressure sensor 5b and the stored correspondence between the cavity air pressure value and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the first pressure sensor 5a, resulting in a more accurate air pressure value inside the airbag 2. This reduces the impact of the inflation and deflation process on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0114] In this application, since the gas fluctuation in the air chamber is generated by the air supply and exhaust device 4, the closer the area is to the air supply and exhaust device 4, the greater the air pressure fluctuation is. Therefore, the second air pressure sensor 5b can be set close to the air supply and exhaust device 4. The closer the second air pressure sensor 5b is to the air supply and exhaust device 4, the more accurate the measurement result will be.

[0115] It is worth mentioning that, Figure 11 Other structures of the blood pressure measuring device shown in the embodiments can be configured with reference to any of the above embodiments. For example, such as Figure 12 As shown, a gas passage cavity 10 can be provided in the blood pressure measuring device, so that the air supply and exhaust device 4 is connected to the gas passage cavity 10 through the first air passage 81, the first air pressure sensor 5a is connected to the gas passage cavity 10 through the second air passage 82, and the gas passage cavity 10 is connected to the airbag 2 through the third air passage 83, so as to realize the connection of a single air nozzle between the main body 1 and the airbag 2. For Figure 11 and Figure 12 The specific configuration of other structures of the blood pressure measuring device shown will not be elaborated here.

[0116] See Figure 13 , Figure 13 This application discloses a blood pressure measurement method using a blood pressure measuring device. The device mainly includes a main body, an air bladder, a first pressure sensor, and a second pressure sensor. The main body includes a cavity, the pressure sensors are located within the cavity, the air bladder has an air chamber connected to the cavity, the first pressure sensor detects the pressure value within the air chamber, and the second pressure sensor detects the pressure value within the cavity. Specific implementation details of this blood pressure measuring device can be found above. Figure 11 and Figure 12 The blood pressure measuring device shown in the embodiment will not be described in detail here. Figure 13 As shown, the blood pressure measurement method of this blood pressure measuring device may include the following steps:

[0117] Step S301: Obtain the air pressure value detected by the first air pressure sensor and the air pressure value detected by the second air pressure sensor when the blood pressure measuring device is being inflated or deflated.

[0118] Step S302: Obtain the corresponding air pressure compensation value based on the air pressure value detected by the second air pressure sensor and the correspondence between the stored cavity air pressure value and the air pressure compensation value.

[0119] Step S303: Compensate the air pressure value detected by the first air pressure sensor according to the obtained air pressure compensation value.

[0120] Therefore, when measuring blood pressure, a pressure compensation value can be obtained based on the pressure value detected by the second pressure sensor and the correspondence between the stored cavity pressure value and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the first pressure sensor, resulting in a more accurate pressure value within the air bladder. This reduces the influence of the cavity pressure on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0121] For example, the correspondence between the chamber pressure value and the pressure compensation value can also be obtained in advance through big data analysis and stored in the processor or memory of the blood pressure measuring device. The correspondence between the chamber pressure value and the pressure compensation value can be established in advance by the processor before the blood pressure measuring device leaves the factory.

[0122] For example, such as Figure 14 As shown, the processor can obtain the correspondence between the cavity air pressure value and the air pressure compensation value in the following way:

[0123] Step S401: Control the blood pressure measuring device to inflate when the airbag is removed, so that the first air pressure value detected by the second air pressure sensor changes.

[0124] Removing the air bladder from the blood pressure measuring device allows the main body cavity to be connected to the outside atmosphere, thus ensuring that the air pressure value detected by the pressure sensor is not affected by the air pressure inside the air bladder cavity, but is mainly generated by the airflow fluctuations inside the cavity.

[0125] In practice, the drive unit can be controlled to gradually increase from a small drive power to a maximum drive power to drive the exhaust system.

[0126] Step S402: Obtain multiple second pressure values ​​detected by the second pressure sensor when the second pressure sensor has multiple different first pressure values, and use the obtained multiple second pressure values ​​as pressure compensation values ​​corresponding to multiple different first gas flow values ​​respectively.

[0127] In practical implementation, when the first air pressure value detected by the second air pressure sensor is q11, the second air pressure value q21 detected by the first air pressure sensor is obtained, and q21 is used as the air pressure compensation value Δp1 corresponding to q11. Then, the drive state is increased until the first air pressure value detected by the second air pressure sensor is q12, at which point the second air pressure value q22 detected by the first air pressure sensor is obtained, and q22 is used as the air pressure compensation value Δp2 corresponding to q12. This process continues until the drive device reaches its maximum drive state, at which point the first air pressure value q1N detected by the second air pressure sensor is obtained, and the second air pressure value q2N detected by the first air pressure sensor is obtained, and q2N is used as the air pressure compensation value ΔpN corresponding to q1N. Thus, the correspondence between q11, q12, q13, q14, ..., q1N and Δp1, Δp2, Δp3, Δp4, ..., ΔpN can be established.

[0128] Step S403: Based on multiple different first air pressure values ​​and their corresponding air pressure compensation values, establish the correspondence between the cavity air pressure value and the air pressure compensation value.

[0129] For example, such as Figure 15 As shown, the processor can establish the correspondence between cavity air pressure values ​​and air pressure compensation values ​​through interpolation based on multiple different first air pressure values ​​and their corresponding air pressure compensation values. For example, for the first air pressure value q1(x) between q11 and q12, q12 and q13, ..., q1N-1 and q1N, if q1(x) is located between q1i and q1j, then the air pressure compensation value Δp(x) corresponding to q1(x) can be determined according to the formula Δp(x)=Δpi+[q1(x)-q1i](Δpj-Δpi) / (q1j-q1i), where i can take any number from 1 to N-1, and j=1+1.

[0130] In specific implementation, in this application, the pressure compensation value Δp(x) corresponding to the first pressure value q1(x) located between 0 and q11, q11 and q12, q12 and q13, ..., q1N-1 and q1N can also be determined by other means, which are not limited here.

[0131] As can be seen from the above, the pre-established correspondence between the cavity air pressure value and the air pressure compensation value is stored. In this way, when blood pressure is measured, the air pressure compensation value can be obtained based on the air pressure value detected by the second air pressure sensor and the stored correspondence between the cavity air pressure value and the air pressure compensation value. The obtained air pressure compensation value is then used to compensate for the air pressure value detected by the first air pressure sensor, so as to obtain a more accurate air pressure value inside the airbag. The blood pressure measurement process of the blood pressure measuring device may include: controlling the drive device to inflate the air bladder using the air supply and exhaust device; then reading the air pressure values ​​detected by the first and second pressure sensors; obtaining a pressure compensation value based on the air pressure value detected by the second pressure sensor and the stored correspondence between the cavity air pressure value and the pressure compensation value; compensating the air pressure value detected by the first pressure sensor based on the obtained pressure compensation value, specifically by subtracting the obtained pressure compensation value from the air pressure value detected by the first pressure sensor to obtain the compensated air pressure value; and then controlling the operating parameters of the drive circuit (e.g., voltage, current, frequency, etc.) to inflate the air bladder based on the compensated air pressure value. This process is executed at least once, for example, once, twice, three times, or four times, to ensure that the compensated air pressure value meets the requirements of the blood pressure measurement's boost curve, thereby completing the blood pressure measurement.

[0132] Reference Figure 16 , Figure 16 This is a schematic diagram of a blood pressure measuring device according to another embodiment of this application. The structure of the blood pressure measuring device in this embodiment differs from any of the above embodiments, primarily in that it includes only one pressure sensor and does not include a flow meter. In this blood pressure measuring device, the pressure sensor 5 is connected to the air chamber of the air bag 2 via a second air passage 82, and is used to detect the air pressure value within the air chamber; the processor 7 is electrically connected to the pressure sensor 5 and the drive device 6, and is used to obtain a pressure compensation value based on the drive state of the drive device 6 and the correspondence between the drive state and the pressure compensation value stored in the blood pressure measuring device; the processor 7 compensates for the air pressure value detected by the pressure sensor 5 based on the obtained pressure compensation value, and controls the drive device 6 based on the compensated air pressure value; the drive device 6 is electrically connected to the air supply and exhaust device 4, and is used to drive the air supply and exhaust device 4 to inflate or deflate under the control of the processor 7.

[0133] In this blood pressure measuring device, when the air supply and deflation device 4 inflates and deflates the airbag 2, the processor 7 can obtain a pressure compensation value based on the driving state of the drive device 6 and the stored correspondence between the driving state and the pressure compensation value. Then, the processor compensates for the pressure value detected by the pressure sensor based on the obtained pressure compensation value, resulting in a more accurate pressure value inside the airbag 2. This reduces the impact of the inflation and deflation process on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0134] It should be noted that the drive state may include at least one parameter related to power supply, such as drive voltage, drive current, and duty cycle.

[0135] It is worth mentioning that, Figure 16 Other structures of the blood pressure measuring device shown in the embodiments can be configured with reference to any of the above embodiments. For example, such as Figure 17 As shown, a gas passage cavity 10 can be provided in the blood pressure measuring device, so that the air supply and exhaust device 4 is connected to the gas passage cavity 10 through the first air passage 81, the first air pressure sensor 5a is connected to the gas passage cavity 10 through the second air passage 82, and the gas passage cavity 10 is connected to the airbag 2 through the third air passage 83, so as to realize the connection of a single air nozzle between the main body 1 and the airbag 2. For Figure 16 and Figure 17 The specific configuration of other structures of the blood pressure measuring device shown will not be elaborated here.

[0136] See Figure 18 , Figure 18 This application discloses a method for measuring blood pressure using a blood pressure measuring device. The device mainly includes a main body, an air bladder, a pressure sensor, and a flow meter. The main body includes a cavity, the pressure sensor is located within the cavity, the air bladder has an air chamber connected to the cavity, and the pressure sensor is used to detect the air pressure value within the air chamber. Specific implementations of this blood pressure measuring device can be found above. Figures 16 to 17 The blood pressure measuring device shown in the embodiment will not be described in detail here. Figure 18 As shown, the blood pressure measurement method of this blood pressure measuring device may include the following steps:

[0137] S501. Obtain the air pressure value detected by the air pressure sensor and the driving status of the blood pressure measuring device when it is being inflated or deflated.

[0138] S502. Obtain the corresponding air pressure compensation value based on the driving state of the blood pressure measuring device and the stored correspondence between the driving state and the air pressure compensation value.

[0139] S503. Compensate the air pressure value detected by the air pressure sensor based on the obtained air pressure compensation value.

[0140] Therefore, when measuring blood pressure, the pressure compensation value can be obtained based on the driving state of the blood pressure measuring device and the stored correspondence between the driving state and the pressure compensation value. This compensation value is then used to compensate for the pressure value detected by the pressure sensor, resulting in a more accurate pressure value within the air bladder. This reduces the influence of the internal pressure on blood pressure measurement, thereby improving the accuracy of blood pressure measurement.

[0141] In this application, the correspondence between the driving state and the air pressure compensation value can be obtained in advance through big data learning and analysis, and stored in advance in the processor or memory of the blood pressure measuring device.

[0142] For example, in this application, such as Figure 19 As shown, the processor can obtain the correspondence between the drive state and the air pressure compensation value in the following way:

[0143] Step S601: Control the blood pressure measuring device to inflate in multiple different driving states when the airbag is removed.

[0144] Removing the air bladder from the blood pressure measuring device allows the main body cavity to be connected to the outside atmosphere, thus ensuring that the air pressure value detected by the pressure sensor is not affected by the air pressure inside the air bladder cavity, but is mainly generated by the airflow fluctuations inside the cavity.

[0145] In practice, the drive unit can be controlled to gradually increase from a small drive power to a maximum drive power to drive the exhaust and gas supply device 4.

[0146] Step S602: Obtain multiple air pressure values ​​detected by the air pressure sensor when the blood pressure measuring device is driven in multiple different driving states, and use the obtained multiple air pressure values ​​as air pressure compensation values ​​corresponding to the multiple different driving states respectively.

[0147] In practical implementation, when the driving power is S1, the air pressure value q1 detected by the air pressure sensor can be obtained, and q1 can be used as the air pressure compensation value Δp1 corresponding to S1. Then, when the driving power is increased to S2, the air pressure value q2 detected by the air pressure sensor can be obtained, and q2 can be used as the air pressure compensation value Δp2 corresponding to S2. This process continues until the driving device reaches the maximum driving power SN, at which point the air pressure value qN detected by the air pressure sensor can be obtained, and qN can be used as the air pressure compensation value ΔpN corresponding to SN. In this way, the correspondence between S1, S2, S3, S4, ..., SN and Δp1, Δp2, Δp3, Δp4, ..., ΔpN can be established.

[0148] Step S603: Based on multiple different driving states and their corresponding air pressure compensation values, establish the correspondence between driving states and air pressure compensation values.

[0149] For example, see Figure 20The processor can establish a correspondence between driving states and their corresponding air pressure compensation values ​​using interpolation. Taking driving power as an example, for the driving power S(x) between S1 and S2, S2 and S3, ..., SN-1 and SN, if S(x) is located between Si and Sj, then the air pressure compensation value Δp(x) corresponding to S(x) can be determined according to the formula Δp(x) = Δpi + [S(x) - Si](Δpj - Δpi) / (Sj - Si). Here, i can take any number from 1 to N-1, and j = 1 + 1.

[0150] In specific implementation, based on the correspondence between S1, S2, S3, S4, ..., SN and Δp1, Δp2, Δp3, Δp4, ..., ΔpN, the correspondence between the driving state and the air pressure compensation value can also be established in other ways, which are not limited here.

[0151] As described above, by storing the pre-established correspondence between drive states and air pressure compensation values, the air pressure compensation value can be obtained during blood pressure measurement based on the drive state and the stored correspondence. This compensation value is then used to compensate for the air pressure value detected by the air pressure sensor, resulting in a more accurate air pressure value within the airbag. The blood pressure measurement process of the device can include: controlling the drive unit to inflate the airbag using the air supply and exhaust device, reading the air pressure value detected by the air pressure sensor, obtaining the air pressure compensation value based on the drive state and the stored correspondence, compensating for the air pressure value detected by the air pressure sensor by subtracting the compensation value from the original air pressure value, and then controlling the operating parameters of the drive circuit (e.g., voltage, current, frequency) to inflate the airbag using the compensated air pressure value. Perform the above procedure at least once, such as once, twice, three times, or four times, so that the compensated air pressure value meets the requirements of the blood pressure measurement curve, thereby completing the blood pressure measurement.

[0152] In summary, when using the blood pressure measuring device provided in this application to measure blood pressure, the air pressure value detected by the air pressure sensor can be compensated according to the obtained air pressure compensation value, thereby effectively reducing the influence of the air pressure inside the main body of the blood pressure measuring device on the measured value of the air pressure sensor, thus making the blood pressure measurement result more accurate.

[0153] Accordingly, this application also provides an electronic device, which may include any of the blood pressure measuring devices provided in the above embodiments. Since the principle by which this electronic device solves the problem is similar to that of the aforementioned blood pressure measuring device, the implementation of this electronic device can refer to the implementation of the aforementioned blood pressure measuring device, and repeated details will not be described again.

[0154] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A blood pressure measuring device, characterized in that, include: The main body, processor, airbag, air supply and exhaust system, drive unit, pressure sensor, and flow meter include: The main body includes a cavity, which is formed by multiple side walls; the air supply and exhaust device and the air pressure sensor are both disposed within the cavity. The airbag has an air cavity and is fixed to one end of the main body; The air supply and exhaust device is connected to the air chamber of the airbag through a first air passage; The air pressure sensor is connected to the air cavity of the airbag through a second air passage and is used to detect the air pressure value in the air cavity; The flow meter is used to detect the gas flow rate between the gas supply and exhaust device and the airbag, or to detect the gas flow rate between the pressure sensor and the airbag. The processor is electrically connected to the pressure sensor, the flow meter, and the drive device. It is used to obtain a corresponding pressure compensation value based on the gas flow value detected by the flow meter and the correspondence between the gas flow value and the pressure compensation value stored in the blood pressure measuring device. It then compensates the pressure value detected by the pressure sensor based on the obtained pressure compensation value and controls the drive device based on the compensated pressure value. The drive device is electrically connected to the air supply and exhaust device and is used to drive the air supply and exhaust device to inflate or deflate under the control of the processor.

2. The blood pressure measuring device as described in claim 1, characterized in that, The flow meter detects the gas flow rate between the gas supply / exhaust device and the airbag, specifically: The flow meter is located in the first gas path and is used to detect the gas flow rate in the first gas path. The flow meter detects the gas flow rate between the pressure sensor and the airbag, specifically: The flow meter is located in the second gas path and is used to detect the gas flow rate in the second gas path.

3. The blood pressure measuring device as described in claim 1, characterized in that, The blood pressure measuring device further includes an air passage cavity, which is disposed within the cavity of the main body; The air supply and exhaust device is connected to the air passage cavity through the first air passage, the air pressure sensor is connected to the air passage cavity through the second air passage, and the air passage cavity is connected to the air chamber of the airbag through the third air passage.

4. The blood pressure measuring device as described in claim 3, characterized in that, The flow meter is located in the third gas path and is used to detect the gas flow rate in the third gas path.

5. The blood pressure measuring device as described in any one of claims 1-4, characterized in that, The processor is also used for: The blood pressure measuring device is controlled to inflate when the airbag is removed, so that the gas flow rate value detected by the flow meter changes; The gas pressure sensor detects multiple pressure values ​​when the flow meter detects multiple different gas flow values, and the obtained multiple pressure values ​​are used as the pressure compensation values ​​corresponding to the multiple different gas flow values ​​respectively. Based on the multiple different gas flow rates and their corresponding pressure compensation values, a correspondence between gas flow rates and pressure compensation values ​​is established.

6. The blood pressure measuring device as described in claim 5, characterized in that, The processor establishes a correspondence between gas flow rates and pressure compensation values ​​based on the multiple different gas flow rates and their corresponding pressure compensation values, specifically for: Based on the multiple different gas flow rates and their corresponding pressure compensation values, an interpolation method is used to establish the correspondence between the gas flow rates and the pressure compensation values.

7. A blood pressure measuring device, characterized in that, include: The main body, processor, airbag, air supply and exhaust device, drive device, first air pressure sensor and second air pressure sensor, wherein: The main body includes a cavity, which is formed by multiple side walls; the air supply and exhaust device, the first air pressure sensor and the second air pressure sensor are all disposed in the cavity. The airbag has an air cavity and is fixed to one end of the main body; The air supply and exhaust device is connected to the air chamber of the airbag through a first air passage; The first air pressure sensor is connected to the air cavity of the airbag through the second air passage, and is used to detect the air pressure value in the air cavity; The second pressure sensor is used to detect the pressure value inside the cavity; The processor is electrically connected to the first air pressure sensor, the second air pressure sensor, and the driving device. It is used to obtain a corresponding air pressure compensation value based on the air pressure value detected by the second air pressure sensor and the correspondence between the cavity air pressure value and the air pressure compensation value stored in the blood pressure measuring device. It compensates the air pressure value detected by the first air pressure sensor based on the obtained air pressure compensation value and controls the driving device based on the compensated air pressure value. The drive device is electrically connected to the air supply and exhaust device and is used to drive the air supply and exhaust device to inflate or deflate under the control of the processor.

8. The blood pressure measuring device as described in claim 7, characterized in that, The second pressure sensor is positioned close to the air supply and exhaust device.

9. The blood pressure measuring device as described in claim 7 or 8, characterized in that, The blood pressure measuring device further includes an air passage cavity, which is disposed within the cavity of the main body; The air supply and exhaust device is connected to the air passage cavity through the first air passage, the first air pressure sensor is connected to the air passage cavity through the second air passage, and the air passage cavity is connected to the air chamber of the airbag through the third air passage.

10. The blood pressure measuring device as described in claim 7 or 8, characterized in that, The processor is also used for: The blood pressure measuring device is controlled to inflate when the airbag is removed, so that the first air pressure value detected by the second air pressure sensor changes; The second pressure sensor detects multiple second pressure values ​​when the second pressure sensor has multiple different first pressure values, and the obtained multiple second pressure values ​​are used as pressure compensation values ​​corresponding to the multiple different first pressure values ​​respectively; Based on the multiple different first air pressure values ​​and their corresponding air pressure compensation values, a correspondence between the cavity air pressure values ​​and the air pressure compensation values ​​is established.

11. The blood pressure measuring device as described in claim 10, characterized in that, When the processor establishes the correspondence between the cavity air pressure value and the air pressure compensation value based on the plurality of different first air pressure values ​​and their respective corresponding air pressure compensation values, it is specifically used for: Based on the multiple different first air pressure values ​​and their corresponding air pressure compensation values, the correspondence between the cavity air pressure values ​​and the air pressure compensation values ​​is established by interpolation.

12. A blood pressure measuring device, characterized in that, include: The main body, processor, airbag, air supply and exhaust system, drive unit, and air pressure sensor, including: The main body includes a cavity, which is formed by multiple side walls; the air supply and exhaust device and the air pressure sensor are both disposed within the cavity. The airbag has an air cavity and is fixed to one end of the main body; The air supply and exhaust device is connected to the air chamber of the airbag through a first air passage; The air pressure sensor is connected to the air cavity of the airbag through a second air passage and is used to detect the air pressure value in the air cavity; The processor is electrically connected to the air pressure sensor and the drive device, and is used to obtain the corresponding air pressure compensation value according to the drive state of the drive device and the correspondence between the drive state and the air pressure compensation value stored in the blood pressure measuring device, to compensate the air pressure value detected by the air pressure sensor according to the obtained air pressure compensation value, and to control the drive device according to the compensated air pressure value. The drive device is electrically connected to the air supply and exhaust device and is used to drive the air supply and exhaust device to inflate or deflate under the control of the processor.

13. The blood pressure measuring device as described in claim 12, characterized in that, The blood pressure measuring device further includes an air passage cavity, which is disposed within the cavity of the main body; The air supply and exhaust device is connected to the air passage cavity through the first air passage, the air pressure sensor is connected to the air passage cavity through the second air passage, and the air passage cavity is connected to the air chamber of the airbag through the third air passage.

14. The blood pressure measuring device as described in claim 12 or 13, characterized in that, The processor is also used for: The blood pressure measuring device is controlled to inflate in multiple different driving states when the airbag is removed; The multiple pressure values ​​detected by the pressure sensor when the blood pressure measuring device is inflated in the multiple different driving states are obtained, and the multiple pressure values ​​obtained are used as the pressure compensation values ​​corresponding to the multiple different driving states respectively. Based on the multiple different driving states and their corresponding air pressure compensation values, a correspondence between driving states and air pressure compensation values ​​is established.

15. The blood pressure measuring device as described in claim 14, characterized in that, The processor establishes a correspondence between the driving states and the corresponding air pressure compensation values ​​based on the multiple different driving states and their respective air pressure compensation values, specifically for: Based on the multiple different driving states and their corresponding air pressure compensation values, the correspondence between the driving states and the air pressure compensation values ​​is established by interpolation.

16. An electronic device, characterized in that, Includes the blood pressure measuring device as described in any one of claims 1-15.

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