Patent Application
20240350023
This application claims priority to Chinese Patent Application No. 202110869082.3, filed with the China National Intellectual Property Administration on Jul. 30, 2021 and entitled “BLOOD PRESSURE MEASURING DEVICE”, which is incorporated herein by reference in its entirety.
This application relates to the field of electronic device technologies, and in particular, to a blood pressure measuring device.
Nowadays, people pay more attention to health of themselves and their families, and blood pressure measurement is also particularly important. With progress and development of science and technology, in addition to emergence of blood pressure measuring devices for home use, some wearable devices (such as smartwatches or smart bands) also start to be integrated with a blood pressure measuring function, which provides a possibility for a user to measure blood pressure anytime and anywhere.
In current blood pressure measuring devices, a micropump and a pressure sensor are directly disposed inside a main body of the blood pressure measuring device. The pressure sensor may obtain a blood pressure value of a user by measuring air pressure inside the main body of the blood pressure measuring device and air pressure of an airbag, However, in a process of performing blood pressure measurement by using the blood pressure measuring device, the micropump inflates gas inside the main body into the airbag, causing an air pressure fluctuation inside the main body, in this case, the air pressure inside the main body measured by the pressure sensor is unstable. As a result, accuracy of the blood pressure value measured by the blood pressure measuring device is low
Therefore, how to provide a blood pressure measuring device that can meet blood pressure measurement accuracy has become a problem to be urgently resolved by a person skilled in the art.
This application provides a blood pressure measuring device, to reduce impact of internal air pressure of the blood pressure measuring device on blood pressure measurement of the blood pressure measuring device, thereby improving accuracy of the blood pressure measurement.
According to a first aspect, this application provides a blood pressure measuring device. The blood pressure measuring device may include a main body, an airbag, an air supply and exhaust apparatus, and a first air pressure sensor. The main body includes a cavity, and each functional module or component of the blood pressure measuring device may be disposed in the cavity. For example, the foregoing air supply and exhaust apparatus and the first air pressure sensor may be disposed in the cavity. The airbag is fixed to an end of the main body, and the airbag has an air cavity. The air supply and exhaust apparatus includes an air inlet passage and an air outlet passage, and the air supply and exhaust apparatus is communicated with the air cavity of the airbag through a first air passage. The first air pressure sensor includes a first air hole, a second air hole, and a pressure film. The pressure film is located between the first air hole and the second air hole. The first air hole is communicated with the air cavity of the airbag through a second air passage. In addition, the cavity of the main body may be enclosed by a plurality of side walls, and a first vent hole may be provided on the side wall, and the first vent hole is communicated with outside atmosphere. In this way, the second air hole of the first air pressure sensor may be communicated with the first vent hole through a third air passage, so that the first air pressure sensor is communicated with the outside atmosphere through the first vent hole. Using the blood pressure measuring device provided in this application, since air pressure on both sides of the pressure film of the first air pressure sensor are external atmospheric pressure and air pressure in the air cavity of the airbag respectively, the first air pressure sensor is not affected by the air pressure in the cavity in a process of performing blood pressure measurement, blood pressure measurement accuracy of the blood pressure measuring device is high.
Since the air supply and exhaust apparatus is disposed in the cavity of the main body, if both an air inlet passage and an air outlet passage of the air supply and exhaust apparatus are communicated with the cavity of the main body, negative pressure is generated in the cavity of the main body during operation of the air supply and exhaust apparatus (a difference between internal and external air pressure, that is, the air pressure inside the cavity of the main body is less than the external atmospheric pressure). In a conventional blood pressure measuring device, to reduce the negative pressure inside the cavity of the main body, the blood pressure measuring device are not designed to be waterproof. A main reason is that disposing of a waterproof-film reduces an air permeating volume of the blood pressure measuring device, so that the negative pressure in the cavity of the main body is large, thereby increasing a system error in the process of blood pressure measurement. In addition, an air pressure value inside the cavity of the main body and fluctuation of the cavity of the main body also cause a blood pressure measurement error. However, most components of the blood pressure measuring device are all disposed in the cavity of the main body. If no waterproof design is performed on the main body, a component in the cavity of the main body of the blood pressure measuring device has a high risk of damage. This affects a service life of the blood pressure measuring device. To resolve this problem, in a possible implementation of this application, a second vent hole may be further provided on the side wall of the main body. The second vent hole is communicated with the outside atmosphere, so that gas of the outside atmosphere can enter the cavity of the main body through the second vent hole, thereby supplementing the air in the cavity of the main body in time to reduce the negative pressure in the cavity
In addition, to implement a waterproof design of the blood pressure measuring device, a first waterproof ventilation apparatus may be disposed at the second vent hole. To reduce impact of the disposing of the first waterproof ventilation apparatus on the air permeating volume of the second vent hole, the air permeating volume of the first waterproof ventilation apparatus may be greater than or equal to 100 ml/min, so that the gas in the cavity of the main body can be supplemented in time and stably.
However, when the first waterproof ventilation apparatus is blocked, the air permeating volume of the first waterproof ventilation apparatus is greatly reduced, resulting in an increase in the negative pressure in the cavity. In a possible implementation of this application, a blockage condition of the first waterproof ventilation apparatus may be determined by measuring air permeability of the first waterproof ventilation apparatus. During a specific implementation, the blood pressure measuring device may further include a second air pressure sensor. The second air pressure sensor is disposed in the cavity of the main body, and the blood pressure measuring device may determine air permeability of the first waterproof ventilation apparatus based on an air pressure value measured by the second air pressure sensor. The second air pressure sensor may be an absolute pressure sensor. When the air pressure value measured by the second air pressure sensor is greater than a first threshold, it may be determined that the air permeability of the first waterproof ventilation apparatus is good. In this application, the first threshold may be set based on a specific application scenario. For example, the first threshold may be 95 Kpa. In this case, when the air pressure value measured by the second air pressure sensor is greater than 95 Kpa, it is determined that the air permeability of the first waterproof ventilation apparatus is good.
Correspondingly, in some possible implementations, when the air pressure value measured by the second air pressure sensor is lower than the first threshold, it may be determined that the first waterproof ventilation apparatus is blocked.
It may be understood that in this application, a second waterproof ventilation apparatus may be further disposed at the first vent hole, to further improve waterproofness of the blood pressure measuring device.
It can be learned from foregoing introductions of this application that one of the reasons for generating the negative pressure in the cavity of the main body is that the airbag is inflated and deflated by the air supply and exhaust apparatus. To reduce impact of operation of the air supply and exhaust apparatus on the negative pressure in the cavity of the main body, in a possible implementation of this application, a fourth vent hole and a fifth vent hole may be further provided, and an air inlet passage of the air supply and exhaust apparatus may be communicated with the outside atmosphere through the fourth vent hole. The air outlet passage may be communicated with the outside atmosphere through the fifth vent hole. In this way, the air supply and exhaust apparatus may inflate gas in the outside atmosphere into the airbag through the fourth vent hole and the air inlet passage, and exhaust gas in the airbag to the outside atmosphere through the air outlet passage and the fifth vent hole.
In this application, the air supply and exhaust apparatus and the first air pressure sensor may be directly connected to or indirectly connected to the airbag through a corresponding air passage. For example, in a possible implementation of this application, the blood pressure measuring device may further include an air passage cavity, and the air passage cavity is disposed in the cavity of the main body. In addition, the air supply and exhaust apparatus may be communicated with the air passage cavity through the first air passage. The first air hole of the first air pressure sensor may be communicated with the air passage cavity through the second air passage, and the air passage cavity is communicated with the air cavity of the airbag through a fourth air passage. In this way, air passages that are of the air supply and exhaust apparatus and the first air pressure sensor and that are configured to be communicated with the airbag may be first combined through the air passage cavity, and then communicated with the airbag through one air passage. In this case, only one through hole for connecting to the airbag needs to be provided on the side wall of the main body, so that a quantity of openings on the main body can be reduced, to improve waterproofness and structural stability of the blood pressure measuring device.
In a possible implementation of this application, to connect the airbag to the main body, a connection hole may be provided at an end of the main body. Further, the airbag has an air nozzle protruding from a side surface of the airbag in a direction toward the main body. In this-way, the air nozzle may be inserted into the connection hole, and the fourth air passage is connected to the air nozzle, to implement communication between the airbag and the air passage cavity, Similarly, in some other possible implementations, the air nozzle may be further disposed at the end of the main body, and the connection hole is provided on the airbag. In this way, connection between the air nozzle and the main body may also be implemented by inserting the air nozzle and the connection hole,
It should be noted that in this application, the airbag may be detachably connected to the main body. In this way, the airbag may be detached or replaced as required. In addition, in a possible implementation of this application, the blood pressure measuring device may further include a photoplethysmography PPG module and an ECG measurement module. The PPG module and the ECG measurement module may be disposed on a bottom surface of the main body. The airbag; may also be fixedly connected to an end of the bottom surface of the main body, so that the blood pressure measuring device integrates a plurality of measurement functions and makes a structure of the blood pressure measuring device compact.
To further improve blood pressure measurement accuracy of the blood pressure measuring device, in this application, a calibration apparatus may be further disposed for the first air pressure sensor. In a possible implementation of this application, the blood pressure measuring device may further include a third air pressure sensor. The third air pressure sensor includes a third air hole and a fourth air hole. In addition, a third vent hole is-further provided on the side wall of the main body. The third vent hole is communicated with the outside atmosphere. The third air hole of the third air pressure sensor is communicated with the air passage cavity through a seventh air passage, and the fourth air hole is communicated with the third vent hole through an eighth air passage. In this way, the third air pressure sensor may measure an air pressure difference between the outside atmosphere and the air pressure in the air cavity of the airbag.
In addition, because the first air pressure sensor also measures the air pressure difference between the outside atmosphere and the air pressure in the air cavity of the airbag, a measured value of the first air pressure sensor can be calibrated by comparing air pressure differences respectively measured by the first air pressure sensor and the third air pressure sensor. During a specific implementation, when a difference between a pressure difference measured by the first air pressure sensor and a pressure difference measured by the third air pressure sensor falls within a first threshold range, it is determined that the pressure difference measured by the first air pressure sensor is accurate. In this application, the-first threshold range may be set based on a specific application scenario. For example, the first threshold range may, be −200 pa to 200 pa.
Similarly, when a difference between a pressure difference measured by the first air pressure sensor and a pressure difference measured by the third air pressure sensor falls outside the first threshold range, it is determined that the pressure difference measured by the first air pressure sensor is inaccurate.
In addition to the foregoing configuration, in a possible implementation of this application, the third air pressure sensor configured to calibrate the measured value of the first air pressure sensor may further be configured as an absolute air pressure sensor. In this implementation, the third air pressure sensor includes only one third air hole. The third air hole may be communicated with the air passage cavity through the seventh air passage. A process of calibrating the measured value of the first air pressure sensor through the third air pressure sensor is: When a difference between air pressure in the airbag measured by the first air pressure sensor and air pressure in the airbag measured by the third air pressure sensor falls within a first threshold range, it is determined that the air pressure in the airbag measured by, the first air pressure sensor is accurate; and/or, when a difference between air pressure in the airbag measured by the first air pressure sensor and air pressure in the airbag measured by the third air pressure sensor falls outside the first threshold range, it is determined that the air pressure in the airbag measured by the first air pressure sensor is inaccurate. Using this implementation, a quantity of vent holes provided on the main body can be reduced, thereby improving waterproofness of the blood pressure measuring device.
In this application, to reduce impact of an air flow fluctuation in each air passage on measurement accuracy, a buffer structure may be disposed in a pipe of the air passage. For example, a plurality of protrusions may be provided in a pipe that is of the second air passage and that is connected to the first air pressure sensor and the airbag. The plurality of protrusions are alternately arranged at intervals along an extension direction of the pipe. The plurality of protrusions may play a. buffering role in a process in which the gas flow in the second air passage, thereby reducing the gas flow fluctuation, and improving measurement accuracy of the first air pressure sensor.
According to a second aspect, this application further provides a blood pressure measuring device, The blood pressure measuring device may include a main body, an airbag, an air supply and exhaust apparatus, a first air pressure sensor, and a second air pressure sensor. The main body includes a cavity, and each functional module or component of the blood pressure measuring device may be disposed in the cavity. For example, the foregoing air supply and exhaust apparatus, the first air pressure sensor, and the second air pressure sensor may be disposed in the cavity. The airbag is fixed to an end of the main body, and the airbag has an air cavity. The air supply and exhaust apparatus includes an air inlet passage and an air outlet passage, and the air supply and exhaust apparatus is communicated with the air cavity of the airbag through a first air passage. The first air pressure sensor includes a first air hole, a second air hole, and a pressure film. The pressure film is located between the first air hole and the second air hole, The first air hole is communicated with the air cavity of the airbag through a second air passage. The second air hole is communicated with the cavity. A pressure difference measured by the first air pressure sensor is determined by air pressure in the cavity of the main body and air pressure in the air cavity of the airbag. In addition, the second air pressure sensor is an absolute air pressure sensor, the second air pressure sensor includes a fifth air hole, and the fifth air hole faces to the second air hole. 100231 Using the blood pressure measuring device provided in this application, the second air pressure sensor is disposed in the cavity of the main body, so that the blood pressure measuring device obtains an air pressure value in the air cavity of the airbag based on external atmospheric pressure, an air pressure value measured by the second air pressure sensor, and a pressure difference measured by the first air pressure sensor. In addition, a difference between the external atmospheric pressure and the air pressure value measured by the second air pressure sensor may be used as an error value for calculating the air pressure in the air cavity of the airbag, and a real air pressure value in the airbag may be obtained, thereby effectively improving blood pressure measurement accuracy of the blood pressure measuring device.
In a possible implementation of this application, the fifth air hole and the second air hole may be alternatively arranged coaxially. In addition, a distance between the fifth air hole and the second air hole may be less than or equal to 1 mm. Since the second air pressure sensor includes only one fifth air hole, the second air pressure sensor can measure the air pressure in the cavity of the main body. In addition, since the distance between the fifth air hole and the second air hole is small, air pressure measured on a side of the fifth air hole may be considered equal to air pressure measured on a side of the second air hole side,
In a possible implementation of this application, a vent hole is further provided on the side wall of the main body. A waterproof ventilation apparatus is disposed at the vent hole. In this case, the blood pressure measuring device may further determine air permeability of the waterproof ventilation apparatus based on the air pressure value measured by the second air pressure sensor. During a specific implementation, when the air pressure value measured by the second air pressure sensor is greater than a first threshold, it can be determined that air permeability of the waterproof ventilation apparatus is good. In this application, the first threshold may be set based on a specific application scenario. For example, the first threshold may be 95 Kpa. In this case, when the air pressure value measured by the second air pressure sensor is greater than 95 Kpa, it is determined that the air permeability of the waterproof ventilation apparatus is good. Correspondingly, in some possible implementations, when the air pressure value measured by the second air pressure sensor is lower than the first threshold, it may be determined that the waterproof ventilation apparatus is blocked. By measuring the air permeability of the waterproof ventilation apparatus, the waterproof ventilation apparatus can be replaced or cleaned in time when the waterproof ventilation apparatus is blocked, to reduce negative pressure in the cavity of the main body, thereby improving measurement accuracy of the blood pressure measuring device.
According to a third aspect, this application further provides a blood pressure measuring device. The blood pressure measuring device may include a main body, an airbag, an air supply and exhaust apparatus, a first air pressure sensor, a second air pressure sensor, and a waterproof ventilation apparatus. The main body includes a cavity, and each functional module or component of the blood pressure measuring device may be disposed in the cavity. For example, the foregoing air supply and exhaust apparatus, the first air pressure sensor, and the second air pressure sensor may be disposed in the cavity. In addition, the cavity is enclosed by a plurality of side walls, and a vent hole is provided on the side wall. The waterproof ventilation apparatus covers the vent hole. The airbag is fixed to an end of the main body, and the airbag has an air cavity. The air supply and exhaust apparatus includes an air inlet passage and an air outlet passage, and the air supply and exhaust apparatus is communicated with the air cavity of the airbag through a first air passage. The first air pressure sensor is configured to measure air pressure in the air cavity of the airbag. The second air pressure sensor is an absolute air pressure sensor. When an air pressure value measured by the second air pressure sensor is greater than a first threshold, it is determined that air permeability of the waterproof ventilation apparatus is good; and/or when the air pressure value measured by the second air pressure sensor is lower than the first threshold, it is determined that the waterproof ventilation apparatus is blocked.
Using the blood pressure measuring device provided in this application, the second air pressure sensor is disposed in the cavity of the main body, so that air permeability of the waterproof ventilation apparatus can be measured, and the waterproof ventilation apparatus can be replaced or cleaned in time, to ensure security of the blood pressure measuring device and stability of blood pressure measurement. Therefore, a blood pressure value measured by the blood pressure measuring device is accurate.
To make the objectives, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings,
To facilitate understanding of the blood pressure measuring device provided in embodiments of this application, the following first describes an application scenario of the blood pressure measuring device. The blood pressure measuring device may be, but is not limited to, a large-volume device configured to measure blood pressure, such as a medical device or a household device, or may be a portable electronic device with a blood pressure measuring function, such as a smartwatch or a smart band. A smartwatch is used as an example. The smartwatch may be worn on a wrist of a user, so that a physical sign such as blood pressure of the user can be measured at any time, to predict a physical condition, thereby effectively avoiding a dangerous secondary disease such as stroke caused by hypertension.
In addition to the foregoing structure, a photoplethysmography (photoplethysmography, PPG) module may generally be further disposed in the smartwatch with the blood pressure measuring function. The PPG module 104 may be alternatively disposed on the bottom surface of the main body 1. In addition, the PPG module 104 may be alternatively disposed on a middle region of the bottom surface of the main body 1 (with reference to a middle circular region of the bottom surface of the main body 1 shown in
Still refer to
It can be understood from introductions of the blood pressure measuring process of the blood pressure measuring device that since the air supply and exhaust apparatus 4 is disposed in the cavity 101 of the main body 1, in the process of inflating the airbag 2 by the air supply and exhaust apparatus 4, the air in the cavity 101 of the main body 1 is inflated into the airbag 2. In this way, the air pressure in the cavity 101 of the main body 1 is less than atmospheric pressure outside the main body 1, so that there is an air pressure difference between the cavity 101 of the main body 1 and the outside of the main body 1, or it may be understood that negative pressure is generated in the cavity 101 of the main body 1. The existence of the negative pressure may cause an error in the blood pressure measuring process. In addition, in the process of inflating and deflating the airbag 2 by the air supply and exhaust apparatus 4, the air pressure fluctuation in the cavity 101 of the main body 1 is caused, and the air pressure fluctuation also causes an error in the blood pressure measurement.
Based on this, this embodiment of this application provides a blood pressure measuring device, to reduce impact of the air pressure in the cavity 101 of the main body 1 of the blood pressure measuring device on blood pressure measurement, thereby improving accuracy of the blood pressure measurement. For ease of understanding, in the following embodiments of this application, a smartwatch is used as an example to describe a specific structure of the blood pressure measuring device in detail.
Terms used in the following embodiments are merely intended to describe specific embodiments, and are not intended to limit this application. As used in the specification and the appended claims of this application, the singular expressions “a/an”, “one”, “the foregoing”. “the” and “this” are intended to also include such expressions as “one or more”, unless otherwise clearly indicated in the context. It should be further understood that in the following embodiments of this application, “at least one” and “one or more” mean one, two, or more. The term “and/or” is used to describe an association relationship between associated objects and indicates that three relationships may exist. For example, A and/or B may represent: Only A exists, both A and B exist, and only B exists, where A and B may be singular or plural. The character “/” generally represents that the associated object is in an “or” relationship.
Reference to “an embodiment”, “some embodiments”, or the like described in the specification of this application indicates that one or more embodiments of this application include a specific feature, structure, or characteristic described with reference to embodiments. Therefore, statements “in one embodiment”, “in some embodiments”, “in some other embodiments”, “in some another embodiment” and the like that differ in this specification do not necessarily refer to a same embodiment, but rather means “one or more but not all embodiments”, unless otherwise specified. The terms “include”, “comprise”, “have”, and variations thereof all mean “including, but not limited to”, unless otherwise particularly specified.
Still refer to
In addition, since the air inlet passage 401 and the air outlet passage 402 of the air supply and exhaust apparatus 4 do not work simultaneously, in a possible embodiment of this application, the air inlet passage 401 and the air outlet passage 402 may be merged. To be specific, only one air passage is disposed on the air supply and exhaust apparatus 4, the air supply and exhaust apparatus 4 may inflate the airbag 2 through the air passage, and the gas in the airbag 2 may be extracted through the air passage, thereby simplifying a structure of the blood pressure measuring device.
In this application, a specific structure of the air supply and exhaust apparatus 4 is not limited. For example, the air supply and exhaust apparatus 4 may be an air pump, and a volume of the air pump may be set based on a requirement of the airbag 2 of the blood pressure measuring apparatus for air supply and exhaust and a size of the cavity 101 of the main body 1. In addition, considering that a volume of the main body 1 of the smartwatch with a blood pressure measuring function is small, so that space of the cavity 101 of the smartwatch is also small. Therefore, a volume of the air pump disposed in the smartwatch is also small. In some possible embodiments of this application, the air pump may be fixed to a mechanical part (not shown), and then the air pump is mounted on the main body 1 by fixing the mechanical part to the main body 1. A material of the mechanical part may be, but is not limited to, metal or non-metal with high strength, to enable the mechanical part can reliably support the air pump, thereby improving structural reliability of the air pump. In this application, a manner of fixing the air pump and the mechanical part is not limited. For example, the air pump and the mechanical part may be fixedly connected through glue dispensing, threaded connection, or the like. In addition, in some embodiments of this application, the glue dispensing may he further performed around the air pump, to seal the air pump and improve structural stability of the air pump.
Still refer to
When the first air pressure sensor 5a is specifically disposed the first air pressure sensor 5a may be a differential air pressure sensor. Further, the first air pressure sensor 5a has a first air hole 501 and a second air hole 502. Specific disposing positions of the first air hole 501 and the second air hole 502 on the first air pressure sensor 5a are not limited. For example, the first air hole 501 and the second air hole 502 may be provided on two end faces disposed opposite to each other of the first air pressure sensor 5a. In addition, the first air pressure sensor 5a may further include a pressure film (not shown). The pressure film is disposed between the first air hole 501 and the second air hole 502. When air pressure at the first air hole 501 and the second air hole 502 is different, the pressure film generates a deformation. The first air pressure sensor 5a may determine an air pressure difference between a side of the first air hole 501 and a side of the second air hole 502 based on a size and direction of the deformation caused by the pressure film.
In this embodiment shown in
Therefore, in this application, air pressure in a side of the first air hole 501 of the pressure film of the first air pressure sensor 5a is air pressure in the airbag 2, and air pressure in a side of the second air hole 502 of the pressure film is the atmospheric pressure. Therefore, the first air pressure sensor 5a is only configured to measure an air pressure difference between the air pressure in the airbag 2 and the atmospheric pressure. However, it is generally considered that the atmospheric pressure is constant, and a blood pressure value measured by using the blood pressure measuring device provided in this application is accurate. In addition, since the air pressure difference measured by the first air pressure sensor 5a is not affected by air pressure in the cavity 101 of the main body 1, accuracy of blood pressure measurement of the blood pressure measuring device is further improved.
In each embodiment of this application, a specific disposing form of each air passage is not limited. The air passage may be disposed in a straight line, or may be a curved device. Specifically, an adaptive adjustment may be performed based on a component in internal space of the blood pressure measuring device. It may be understood that for clarity of the illustrations, in each schematic diagram of this application, each air passage is shown as a straight line.
In addition, considering that gas in each air passage (for example, the first air passage 61, the second air passage 62, the third air passage 63) may have a problem of an airflow fluctuation during flowing, and the airflow fluctuation may cause an air pressure fluctuation, thereby affecting a result of blood pressure measurement. To resolve this problem,
In this application, a specific disposing form of the protrusion 602 is not limited. For example, a cross-sectional shape of the protrusion 602 may be a circle shown in
Based on introductions in the foregoing embodiment of this application, the first air pressure sensor 5a is communicated with the vent hole 102a on the side wall of the main body 1 through the second air passage 62, to enable the second air hole 502 of the first air pressure sensor 5a to he communicated with the outside atmosphere. In some possible embodiments of this application, both the air inlet passage 401 and the air outlet passage 402 of the air supply and exhaust apparatus 4 may directly communicate with the outside atmosphere through the vent hole provided on the side wall of the main body 1.
To ensure a normal operation of the air supply and exhaust apparatus 4, in addition to the foregoing mentioned configuration in which both the air inlet passage 401 and the air outlet passage 402 directly communicate with the outside atmosphere through the vent hole on the side wall of the main body 1, this may be alternatively achieved by reducing negative pressure in the cavity 101 of the main body 1. In this application, reducing the negative pressure in the cavity 101 of the main body 1 means reducing an air pressure difference between the gas in the cavity 101 and the outside atmosphere outside the main body 1.
To reduce the negative pressure in the cavity 101 of the main body 1, a vent hole 102d is usually provided on the side wall of the main body 1 by a conventional blood pressure measuring device, and a waterproof design is not performed at the vent hole 102d, Still refer to
However, most functional modules and components of the blood pressure measuring device are all disposed in the cavity 101 of the main body 1. If no waterproof design is performed on the main body 1, the functional modules and components in the cavity 101 of the main body 1 of the blood pressure measuring device have a high risk of damage. This affects a service life of the blood pressure measuring device. Especially for a portable electronic device that is frequently worn by a user and has a large quantity of application scenarios, such as a smartwatch or a smart band, a necessity of a waterproof design of the portable electronic device is more significant.
Based on this, refer to
To supplement air for the cavity 101 in time, in some possible embodiments of this application, an aperture of the vent hole 102d may be set to be large, for example, may be greater than or equal to 1 mm. In addition, there may be a plurality of vent holes 102d, and the plurality of vent holes 102d may be arranged in an array but are not limited to be arranged in an array.
in this embodiment shown in
In addition, to meet a requirement of the blood pressure measuring device for an airflow rate in a blood pressure measuring process, in some embodiments of this application, an air permeating volume of the first waterproof ventilation apparatus 8 may be set. For example, the air permeating volume of the first waterproof ventilation apparatus 8 may be greater than or equal to 100 ml/min. In some other embodiments of this application, a disposing area of the-first waterproof ventilation apparatus 8 may be further adjusted. For example, an area of the first waterproof ventilation apparatus 8 may be greater than 10 min2.
Using the blood pressure measuring device provided in this application, air permeability of the entire blood pressure measuring device can be met by providing the vent hole 102d, In addition, the first waterproof ventilation apparatus 8 is disposed at the vent hole 102d, so that the blood pressure measuring device has good waterproofness and air permeability, to enable the blood pressure measuring device to be used in some scenarios that require a high waterproof level, thereby expanding an application scenario of the blood. pressure measuring device. In addition, since in a process of performing blood pressure measurement by using the blood pressure measuring device provided in this application, a pressure difference measured by the first air pressure sensor 5a is not affected by the air pressure in the cavity 101 of the main body 1, making a blood pressure value measured by the blood pressure measuring device become accurate.
It can be learned from introductions of the foregoing embodiment that the vent hole 102a of the blood pressure measuring device provided in this embodiment of this application is only configured to communicate a second air hole 502 of the first air pressure sensor 5a with the outside atmosphere. In some scenarios in which a waterproof requirement of the first air pressure sensor 5a is not high, or the first air pressure sensor 5a has a waterproof structure, or an aperture of the vent hole 102a is small, a waterproof design may not be performed on the vent hole 102a, thereby simplifying a structure of the blood pressure measuring device. However, in some blood pressure measuring devices with high waterproof requirements, a waterproof ventilation apparatus may be alternatively disposed at the vent hole 102a. Still refer to
It should be noted that in this embodiment shown in
Since in this embodiment shown in
In this application, a first threshold may be set for P1. In this way, when the air pressure value P1 measured by the second air pressure sensor 5b is less than the set first threshold, it is determined that the air permeability of the first waterproof ventilation apparatus 8 is good. In this embodiment of this application, a value of the first threshold may be set based on a specific application scenario. For example, the first threshold may be set to 95 KPa In this way, when the air pressure value P1 measured by the second air pressure sensor 5b is greater than 95 KPa, it is considered that air permeability of the first waterproof ventilation apparatus 8 is good.
In addition, when the air pressure value P1 measured by the second air pressure sensor 5b is lower than the first threshold, it is determined that the first waterproof ventilation apparatus 8 is blocked. In this case, a user may replace or clean the first waterproof ventilation apparatus 8 to ensure security of the blood pressure measuring apparatus and stability of the blood pressure measurement.
It may be understood that in this application, the first waterproof ventilation apparatus 8 may be disposed outside the main body 1, or may be disposed inside the main body 1. In addition, the first waterproof ventilation apparatus 8 and the main body 1 may be fixed in a manner of thread locking, clamping, or the like, to implement a detachable connection between the first waterproof ventilation apparatus 8 and the main body 1, thereby facilitating replacement, cleaning, and the like of the first waterproof ventilation apparatus 8.
Based on the foregoing change of a structure of the blood pressure measuring device, in this embodiment of this application, a connection manner between a first air pressure sensor 5a, an air supply and exhaust apparatus 4, and an airbag 2 is also adaptively changed. During a specific implementation, still refer to
Using the blood pressure measuring device provided in this embodiment of this application, by adding a design of the air passage cavity 10, an air inlet passage 401 and an air outlet passage 402 of the air supply and exhaust apparatus 4 may be communicated with the air cavity of the airbag 2 through the air passage cavity 10. When the air supply and exhaust apparatus 4 operates, the air supply and exhaust apparatus 4 may draw gas from the cavity 101 of the main body 1 into the air passage cavity 10, and then the gas enters the air cavity of the airbag 2. In addition, the air supply and exhaust apparatus 4 may exhaust the gas in the airbag 2 by exhausting the gas in the air passage cavity 10 through the air outlet passage 402.
In addition, after the first air pressure sensor 5a is communicated with the air supply and exhaust apparatus 4 through the air passage cavity 10, the first air pressure sensor 5a may be communicated with the airbag 2 through only one air passage (the fourth air passage 64).
In addition, in this embodiment of this application, a specific structure of the air nozzle 201 of the airbag 2 is not limited. For example,
It may be understood that when the airbag 2 is connected to the main body 1 through the single air nozzle, an air passage cavity 10 may be communicated with the air nozzle 201 of the airbag 2 through a fourth air passage 64, to implement communication between the air passage cavity 10 and the air cavity of the airbag 2.
It should be noted that another structure of the blood pressure measuring device shown in
In some embodiments of this application, to ensure security of the blood pressure measuring device, an air valve 11 may be further disposed in the blood pressure measuring device. The air valve 11 may be communicated with the air supply and exhaust apparatus 4, and may be used as a spare air outlet port of the air supply and exhaust apparatus 4. During a specific implementation, FIG, 12 is a schematic diagram of a framework structure of a blood pressure measuring device according to another possible embodiment of this application. By comparing the blood pressure measuring device shown in
In addition, it can be learned from foregoing introductions that the air inlet passage 401 and the air outlet passage 402 of the air supply and exhaust apparatus 4 directly, communicate with outside atmosphere through a vent hole on the side wall of the main body 1. In some embodiments of this application, the second air opening 1102 of the air valve 11 may be alternatively enabled to directly communicate with the outside atmosphere through a sixth air passage 66 and the vent hole provided on the side wall of the main body 1, to reduce the impact of operation of the air valve 11 on the air pressure in the cavity 101 of the main body 1.
In this embodiment of this application, since the air outlet passage 402 of the air supply and exhaust apparatus 4 is communicated with the air passage cavity 10, the air valve 11 may be communicated with the air outlet passage 402 of the air supply and exhaust apparatus 4. In this way, in a case of a failure of the air outlet passage 402 of the air supply and exhaust apparatus 4, a blockage of the air outlet passage 402, or the like, exhaust of the air passage cavity 10 can be implemented by opening the air valve 11, thereby avoiding damages to components such as the air supply and exhaust apparatus 4, the first air pressure sensor 5a, or the airbag 2, to ensure security of the blood pressure measuring device in a process of blood pressure Measurement.
In this application, a specific disposing form of the air valve 11 is not limited. For example, the air valve 11 may be a solenoid valve. In this way, the opening and closing of the air valve 11 may be programmed as required, thereby simplifying operations of the blood pressure measuring device and improving user experience. For example, in a possible embodiment of this application, the air valve 11 may be configured as: When air pressure in the air passage cavity 10 is greater than a particular value (for example, 300 mmHg), the air valve 11 is electrically controlled to be opened to deflate. When the air pressure value in the air passage cavity 10 is reduced to a particular value (for example, 10 mmHg) or below, the air valve 11 is closed. Therefore, the air valve 11 can be adaptively opened or closed based on the air pressure value in the air passage cavity 10, so that the air pressure in the entire air passage system is maintained in a stable state, to improve operating reliability of the blood pressure measuring device.
It can be learned from introductions of the air valve 11 in the foregoing embodiment that security performance of the blood pressure measuring device can be effectively improved by disposing the air valve 11. Based on this, in some possible embodiments of this application, the air valve 11 may be alternatively disposed on the air passage of the blood pressure measuring device (for example, the first air passage 61, the third air passage 63, or a fourth air passage 64), to control opening and disclosing of a corresponding air passage through the air valve 11, to implement flexible control on a flow condition of gas in the air passage, and further improve operating reliability of the blood pressure measuring device.
It should be noted that another structure of the blood pressure measuring device shown in
In addition, in this application, to improve accuracy of measuring a blood pressure value by the blood pressure measuring device, a calibration device may be added to the first air pressure sensor 5a, to calibrate an air pressure value in the air cavity of the airbag 2 measured by the first air pressure sensor 5a. During a specific implementation,
It can be understood from the foregoing introductions of a specific configuration of the third air pressure sensor 5c that both the third air pressure sensor 5c and the first air pressure sensor 5a measure a pressure difference between the air passage cavity 10 and the outside atmosphere. Based on this, whether the measurement of the first air pressure sensor 5a is accurate may be determined by comparing a pressure difference measured by the first air pressure sensor 5a with a pressure difference measured by the third air pressure sensor 5c. The determining process may be, for example, as follows: When a difference between a pressure difference measured by the first air pressure sensor 5a and a pressure difference measured by the third air pressure sensor 5c is within a first threshold range, it is determined that the pressure difference measured by the first air pressure sensor 5a is accurate. In addition, the blood pressure measuring device is enabled to calculate a corresponding blood pressure value based on the pressure difference. In this application, the first threshold range may be set based on a, specific application scenario. For example, the first threshold range may be −200 pa to 200 pa
In addition, when a difference between a pressure difference measured by the first air pressure sensor 5a, and a pressure difference measured by the third air pressure sensor 5c is outside the first threshold range, it is determined that the pressure difference measured by the first air pressure sensor 5a is inaccurate. A group of differential pressure data measured by the first air pressure sensor is discarded, and a next measurement is performed until a difference between a pressure difference measured by the first air pressure sensor 5a and a pressure difference measured by the third air pressure sensor 5c falls within the first threshold range. In addition, the blood pressure measuring device is enabled to calculate a corresponding blood pressure value based on the pressure difference.
It should be noted that another structure of the blood pressure measuring device shown in this embodiment in
Using the blood pressure measuring device in this embodiment of this application, the third air pressure sensor 5c is added to calibrate the pressure difference measured by the first air pressure sensor Sa This can effectively improve accuracy of measuring a blood pressure value by the blood pressure measuring device.
In this application, in addition to using the differential air pressure sensor shown in
In this embodiment shown in
In addition, when a difference between the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air cavity of the airbag 2 measured by the third air pressure sensor 5c is outside the first threshold range, it is determined that the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor is inaccurate. A group of air pressure data measured by the first air pressure sensor 5a is discarded, and a next measurement is performed until a difference between the air pressure in the air cavity of the airbag 2 measured by the first air pressure sensor 5a and the air pressure in the air cavity of the airbag 2 measured by the third air pressure sensor 5c falls within the first threshold range. In addition, the blood pressure measuring device is enabled to calculate a corresponding blood pressure value based on the air pressure.
It can be learned from introductions of an operating principle of the first air pressure sensor 5a in the foregoing embodiment that the air pressure difference measured by the first air pressure sensor 5a is directly determined through external atmospheric pressure and the air pressure in the air cavity of the airbag 2. Generally, the external atmospheric pressure is considered to be a constant value. Therefore, the air pressure value in the air cavity of the airbag 2 can be directly obtained through the pressure difference measured by the first air pressure sensor 5a and the external atmospheric pressure.
It should be noted that another structure of the blood pressure measuring device shown in this embodiment in
Using the blood pressure measuring device in this embodiment of this application, the third air pressure sensor 5c is added to calibrate a result measured by the first air pressure sensor 5a, thereby effectively improving accuracy of measuring a blood pressure value by the blood pressure measuring device.
To reduce impact of a change of the air pressure in the cavity 101 of the main body 1 on accuracy of the air pressure difference measured by the first air pressure sensor 5a, still refer to
Since the second air pressure sensor 5b includes only one fifth air hole 505, the second air pressure sensor 5b can measure the air pressure in the cavity 101 of the main body 1. In addition, since the distance between the fifth air hole 505 and the second air hole 502 is small, air pressure measured on a side of the fifth air hole 505 may be considered equal to air pressure measured on a side of the second air hole 502.
When using the blood pressure measuring device shown in
It may be understood that in this embodiment of this application, although the air pressure in the main body 1 is low, the second air pressure sensor 5b is disposed in the cavity 101 of the main body 1. In this way, a difference between the air pressure P1 of the outside atmosphere and the air pressure value measured by the second air pressure sensor 5b may be used as an error value for calculating the air pressure in the air cavity of the airbag 2, and an actual air pressure value in the airbag 2 may be obtained. Therefore, blood pressure measurement accuracy of the blood pressure measuring device can be effectively improved.
In addition, in this embodiment of this application, the first waterproof ventilation apparatus 8 may be disposed at the vent hole 102d of the blood pressure measuring device. In this way, while the entire blood pressure measuring device is waterproofed, accuracy of a blood pressure value measured by the blood pressure measuring device can be ensured.
Since the second air pressure sensor 5b is disposed in the cavity 101 of the main body 1, and the second air pressure sensor 5b is an absolute pressure sensor. It can be understood from the foregoing introductions of measuring a blockage degree of the first waterproof ventilation apparatus 8 by disposing the second air pressure sensor 5b, in this embodiment shown in
In this application, the first waterproof ventilation apparatus 8 may be disposed outside the main body 1, or may be disposed inside the main body 1. In addition, the first waterproof ventilation apparatus 8 and the main body 1 may be fixed in a manner of thread. locking, clamping, or the like, to implement a detachable connection between the first waterproof ventilation apparatus 8 and the main body 1, thereby facilitating replacement, cleaning, and the like of the first waterproof ventilation apparatus 8.
It should be noted that another structure of the blood pressure measuring device in this embodiment shown in
When using the blood pressure measuring device provided in this application to perform blood pressure measurement, impact of the air pressure in the cavity 101 of the main body 1 of the blood pressure measuring device on a measurement value of the first air pressure sensor 5a can be effectively reduced, so that a blood pressure measuring result is accurate. In addition, the first waterproof ventilation apparatus 8 may be disposed on the main body 1 of the blood pressure measuring device, to implement a waterproof design of the blood pressure measuring device, In addition, the air permeability of the first waterproof ventilation apparatus 8 can be measured by disposing the second air pressure sensor 5b, to prevent the blockage of the first waterproof ventilation apparatus 8 from affecting the measurement result of the blood pressure measuring device.
The foregoing descriptions are merely specific implementations of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110869082.3 | Jul 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/107437 | 7/22/2022 | WO |
