Wearable blood pressure measurement device

Abstract

The present application relates to the field of terminal technology, and in particular to a wearable blood pressure measuring device. The wearable blood pressure measuring device includes: a wrist detection device and a finger detection device; the wrist detection device includes a first main body mounted on the wrist, and a first sensor and a first processor arranged on the first main body, the first sensor is used to detect the photoplethysmogram signal of the wrist, and send the detected signal to the first processor, the first main body has a storage space for accommodating the finger detection device; the finger detection device includes a second main body mounted on the finger, and a second sensor arranged on the second main body, the second sensor is used to detect the photoplethysmogram signal of the finger, and send the detected signal to the first processor, the first processor obtains the blood pressure value according to the finger signal, the wrist signal and the model parameters. The wearable blood pressure measuring device in the present application can detect the user's blood pressure value in real time.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a wearable blood pressure measurement device. Background Art

[0002] With the continuous development of technology, wearable devices have become very common electronic products in our lives. Among them, smart watches and bracelets are the most accepted wearable devices by the public, and are also widely used in the monitoring of daily exercise and basic health parameters.

[0003] Currently, the health functions of common wearable devices mainly include measuring heart rate, blood oxygen concentration, respiratory rate, body temperature, electrocardiogram, etc. However, as a very important physical parameter of the human body, there is no mature wearable device that can achieve accurate, real-time and continuous measurement of blood pressure (BP). Hypertension is one of the common symptoms of many chronic diseases (especially cardiovascular diseases).

[0004] Therefore, there is an urgent need for a wearable blood pressure measuring device that can detect the wearer's blood pressure in real time. Summary of the invention

[0005] The present application provides a wearable blood pressure measuring device that can detect the user's blood pressure value in real time.

[0006] The present application provides a wearable blood pressure measurement device, including a wrist detection device and a finger detection device, the wrist detection device including a first main body, a first processor and a first sensor, the first main body is mounted on the wrist, the first processor and the first sensor are both arranged in the first main body, the first main body has an accommodation space for accommodating the finger detection device, wherein the first sensor is used to detect a photoplethysmogram signal of the wrist, and send the detected photoplethysmogram signal of the wrist to the first processor; the finger detection device includes a second main body and a second sensor, the second main body is used to be mounted on the finger, the second sensor is arranged inside the second main body, wherein the second sensor is used to detect the photoplethysmogram signal of the finger, and send the detected photoplethysmogram signal of the finger to the first processor, and the first processor obtains a blood pressure value according to the photoplethysmogram signal of the finger, the photoplethysmogram signal of the wrist and the model parameters. Specifically, the wrist detection device can be a smart bracelet or a smart watch, and the wrist detection device can be continuously worn on the wrist of use. When detecting blood pressure, the wearer can first remove the finger detection device from the wrist detection device, and wear the finger detection device on the user's finger, and the first sensor and the second sensor work synchronously. The first sensor and the second sensor send the detected photoplethysmogram signal of the finger and the detected photoplethysmogram signal of the wrist to the first processor. The first processor can obtain the user's blood pressure value based on the photoplethysmogram signal of the finger, the photoplethysmogram signal of the wrist and the model parameters.

[0007] It should be noted that the formula for the first processor to obtain the user's blood pressure value BP may conform to the following formula:

[0008] PWV = D / PTT;

[0009] BP = a*PWV+b*HR+c*RR+e;

[0010] Wherein, D is the distance between the first sensor in the wrist detection device and the second sensor in the finger detection device; PTT is the pulse wave transmission time calculated by the first processor or the second processor; PWV is the pulse wave velocity calculated by the first processor or the second processor; HR is the heart rate detected by the first sensor or the second sensor, and RR is the respiratory rate detected by the first sensor or the second sensor; a, b, c and e are preset model parameters that need to be corrected.

[0011] The blood pressure value obtained by the above formula can improve the stability and accuracy of the blood pressure model by introducing heart rate and respiratory rate, making the measured blood pressure value more accurate.

[0012] In one embodiment, the second main body may include a plurality of finger petals and a plurality of elastic connectors, two adjacent finger petals are connected by at least one elastic connector, and the second sensor is disposed in any one of the finger petals. Since the two adjacent finger petals are connected by the elastic connector, the spacing between the two adjacent finger petals is adjustable. When the second main body is worn on a finger and the second main body is received in the receiving space, the inner diameter of the second main body can be adjusted according to the inner diameter of the receiving space and the thickness of the finger, thereby improving the adaptability of the second main body to the finger and the receiving space.

[0013] In one embodiment, the second main body may further include a plurality of functional modules, and the functional modules may be provided in at least some of the finger petals. Specifically, the functional module may be at least one of a second processor, a second wireless module and a battery, and the specific types of the functional modules may be adjusted according to actual needs. In order to ensure the diversity of functions of the finger detection device and the convenience of detection, the functional modules may include a second processor, a second wireless module and a battery, and the second processor, the second wireless module, the second sensor and the battery may be respectively arranged in different finger petals, and the elastic connector for connecting two adjacent finger petals may electrically connect the two adjacent finger petals, and the signals of the second processor and the second sensor may be transmitted to the second wireless module. In addition, it may also be ensured that the battery can power the second processor, the second sensor and the second wireless module. The second processor, the second wireless module and the second processor can also be set in the same finger petal, and the battery is set in the other finger petal. In this setting, the second sensor can conveniently transmit the detected photoplethysmogram signal of the finger to the second wireless module, and the second processor can also conveniently send the stored model parameters to the second wireless module, and the battery can power the second wireless module, the second processor and the second sensor through the elastic connector, so that the second wireless module, the second sensor and the second processor can work continuously and stably, and no external lead is required to power them, thereby improving the convenience of using the finger detection device. The second wireless module in this way transmits the photoplethysmogram signal and model parameters of the finger to the first processor of the first main body. Since the first processor also receives the photoplethysmogram signal of the wrist detected by the first sensor, the blood pressure value of the human body is obtained.

[0014] It should be noted that, in order to enable the second sensor to conveniently detect the photoplethysmographic signal of the finger, a protrusion may be provided on the finger flap where the second sensor is provided.

[0015] In one embodiment, two magnets may be disposed in each finger petal, and in two adjacent finger petals, the magnetic poles of the two magnets close to each other are opposite. Since there is an attraction between the two magnetic poles with opposite magnetic poles, when the second main body is worn on a finger, each finger petal in the second main body can be closely attached to the finger, thereby improving the user's experience.

[0016] In the above embodiment, the finger detection device may be a smart ring, and the specific number of finger petals may be 6-8, so as to ensure that the user has a better wearing feeling when the second main body is worn on the finger.

[0017] In one embodiment, the first main body may include a housing, a dial and a first wireless module, wherein the first wireless module, the first sensor and the first processor are all arranged in the dial, the first wireless module is connected to the second wireless module, the first processor and the first sensor signal, the first wireless module can transmit the finger photoplethysmogram signal and the model parameter transmitted by the second wireless module to the first processor, and the first sensor also transmits the detected wrist photoplethysmogram signal to the first processor to obtain the blood pressure value of the human body, and the blood pressure value can be displayed on the dial. In addition, the housing is provided with a groove on the side away from the wrist, the dial is arranged in the groove, and there is a gap between the dial and the inner wall of the groove, and the gap forms a storage space for accommodating the finger flap, so that when the blood pressure value of the human body is not detected, the finger detection device can be placed in the storage space, which can improve the portability of the finger detection device. In the specific implementation process, the model parameters can also be set in the first processor all the time, as long as the first processor can obtain the model parameters, the wrist photoplethysmogram signal and the finger photoplethysmogram signal and obtain the blood pressure value.

[0018] In one embodiment, the storage space is provided with a plurality of stations for accommodating the finger flap, specifically, a charging station and a station for accommodating the second sensor, wherein the charging station can cooperate with the finger flap provided with a battery, and then the battery can be charged, thereby improving the endurance of the finger detection device, so that when the finger detection device detects the finger, each functional module in the finger detection device has sufficient power, thereby ensuring that the user can measure his or her blood pressure at any time. In addition, because the station provided with the first sensor finger flap has a protruding portion, the station for accommodating the finger flap is different from other stations, so that the finger detection device can be conveniently arranged in the storage space.

[0019] In one embodiment, a handheld device connected to the wrist detection device signal may also be included, the handheld device may be connected to the first wireless module in the wrist detection device, the first wireless module may transmit the blood pressure value obtained by the first processor to the handheld device, and the handheld device may display the obtained blood pressure value. The handheld device may be a mobile phone or a tablet computer, and setting the handheld device as a mobile phone or a tablet computer may facilitate the user to carry it, thereby improving the convenience of detection.

[0020] Measuring blood pressure using the wearable blood pressure measuring device includes the following steps:

[0021] The user separates the finger detection device from the wrist detection device, and puts the finger detection device on the finger, and the wrist detection device is put on the wrist; the first processor in the wrist detection device obtains the wrist photoplethysmogram signal, the finger photoplethysmogram signal and the model parameters; the first processor obtains the blood pressure value according to the wrist photoplethysmogram signal, the finger photoplethysmogram signal and the model parameters.

[0022] When measuring blood pressure values ​​in the above manner, the finger detection device and the wrist detection device can be regarded as a whole and worn on the wrist. The user can remove the finger detection device at any time to complete the measurement of his or her own blood pressure, thereby improving the convenience of blood pressure detection.

[0023] The step of obtaining the blood pressure value according to the wrist photoplethysmogram signal, the finger photoplethysmogram signal and the model parameters includes: a first sensor collects the wrist photoplethysmogram signal within a first time period, obtains the timestamp of the peak feature point of the wrist photoplethysmogram signal within the first time period, and transmits the obtained timestamp of the peak feature point of the wrist photoplethysmogram signal within the first time period to the first processor; a second sensor collects the finger photoplethysmogram signal within the first time period, obtains the timestamp of the peak feature point of the finger photoplethysmogram signal within the first time period, and transmits the obtained timestamp of the peak feature point of the finger photoplethysmogram signal to the first processor of the wrist detection device, the first processor obtains the pulse wave transmission time, pulse wave velocity, heart rate and respiratory rate according to the timestamp of the peak feature point of the wrist photoplethysmogram signal within the first time period and the timestamp of the peak feature point of the finger photoplethysmogram signal within the first time period, and then calculates the model parameters through the regression model, and brings the model parameters and the pulse wave velocity, heart rate and respiratory rate into the preset formula to obtain the blood pressure value. The first duration may be 10s, 20s or 30s, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1a A schematic diagram of the structure of a wearable blood pressure measurement device provided in an embodiment of the present application;

[0025] Figure 1b A schematic diagram of the wearable blood pressure measurement device provided in an embodiment of the present application when in use;

[0026] Figure 2 A schematic diagram of a photoplethysmographic signal detected by a wrist detection device and a finger detection device in a wearable blood pressure measurement device provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of a finger detection device in a wearable blood pressure measurement device provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of a wrist detection device and a handheld device in a wearable blood pressure measurement device provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of an application scenario of a wearable blood pressure measurement device including a handheld device provided in an embodiment of the present application;

[0030] Figure 6 A flow chart of a method for using a wearable blood pressure measurement device provided in an embodiment of the present application;

[0031] Figure 7 Another flow chart of a method for using a wearable blood pressure measurement device provided in an embodiment of the present application;

[0032] Figure 8 A flowchart for obtaining model parameters in the method for using the wearable blood pressure measurement device provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 10-wrist detection device; 11-first main body; 110-housing; 111-dial; 12-accommodating space; 120-charging station; 13-cover; 20-finger detection device; 21-finger flap; 22-second sensor; 23-second processor; 24-battery; 25-magnet; 26-elastic connector; 30-handheld device. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0036] A common wearable device for measuring blood pressure is to shrink a cuff and integrate it into the wristband of a smartwatch. The wristband is inflated and deflated to compress the wrist pulse, measure the pulse blood pressure at the wrist, and calculate the blood pressure value. However, inflating the wristband of a smartwatch will compress the wrist, causing discomfort and affecting the user experience. In addition, this method cannot be inflated and deflated continuously, and the blood pressure measurement is a single time, which cannot achieve continuous blood pressure measurement.

[0037] With the continuous development of technology, new wearable devices are constantly appearing in the public's field of vision. Smart rings are one of them. Smart rings can be used to monitor daily heart rate and other vital signs. Although smart rings are different from watches in form, most of their health monitoring functions are repeated. The industry has not yet found a good solution to make smart rings and watches coexist. In addition, due to the smaller size of the ring, its battery life and health functions need to be balanced and improved. In addition, smart rings cannot measure the wearer's blood pressure alone.

[0038] To this end, the present application provides a wearable blood pressure measurement device that can be used in conjunction with a smart watch and a smart ring to measure the wearer's blood pressure.

[0039] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0040] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0041] Reference Figure 1a and Figure 1bThe present application provides a wearable blood pressure measurement device, including a wrist detection device 10 and a finger detection device 20, the wrist detection device 10 includes a first main body 11, a first processor (not shown in the figure) and a first sensor (not shown in the figure), the first main body 11 is mounted on the wrist, the first processor and the first sensor are both arranged in the first main body 11, the first main body 11 has a receiving space 12 for accommodating the finger detection device 20, wherein the first sensor is used to detect a photoplethysmogram signal of the wrist, and send the detected photoplethysmogram signal of the wrist to the first processor; the finger detection device 20 includes a second main body and a second sensor 22, the second main body is used to be mounted on the finger, the second sensor 22 is arranged inside the second main body, wherein the second sensor 22 is used to detect the photoplethysmogram signal of the finger, and send the detected photoplethysmogram signal of the finger to the first processor, and the first processor obtains a blood pressure value according to the photoplethysmogram signal of the finger, the photoplethysmogram signal of the wrist and the model parameters. In actual use, the wrist detection device 10 can be configured as a smart watch or a smart bracelet. Therefore, the wrist detection device 10 can be worn on the user's wrist all the time, that is, the first main body 11 is mounted on the wrist of the person to be detected. When specifically detecting blood pressure, the finger detection device 20 is first removed from the wrist detection device 10, and the second main body is mounted on the finger of the person to be detected. At this time, the first sensor arranged on the first main body 11 and the second sensor 22 arranged on the second main body work synchronously, and the detected photoplethysmogram signal of the finger and the detected photoplethysmogram signal of the wrist are sent to the first processor. The first processor can obtain the user's blood pressure value according to the photoplethysmogram signal of the finger, the photoplethysmogram signal of the wrist and the model parameters. In this detection method, when blood pressure is not detected, the finger detection device 20 can be set in the wrist detection device 10, and the finger detection device 20 and the wrist detection device 10 can be regarded as a whole worn on the wrist. The user can remove the finger detection device 20 at any time and cooperate with the wrist detection device 10 to complete the measurement of his or her own blood pressure, and thus can monitor his or her own physical condition in real time.

[0042] It should be noted that, refer to Figure 2 The formula for the first processor to obtain the user's blood pressure value BP may conform to the following formula:

[0043] PWV = D / PTT;

[0044] BP = a*PWV+b*HR+c*RR+e;

[0045] Wherein, D is the distance between the first sensor in the wrist detection device and the second sensor in the finger detection device; PTT is the pulse wave transmission time calculated by the first processor or the second processor; for details, please continue to refer to Figure 2 , Figure 2 The time difference between f and g or f1 and g1 is the pulse wave transmission time; PWV is the pulse wave velocity calculated by the first processor or the second processor; HR is the heart rate detected by the first sensor or the second sensor, and RR is the respiratory rate detected by the first sensor or the second sensor; a, b, c and e are preset model parameters that need to be corrected, and a, b, c and e are stored in the first processor or the second processor. When the pulse wave velocity is calculated by the second processor, the second processor sends the calculated pulse wave velocity to the first processor, and when the heart rate and respiratory rate are detected by the second sensor, the second sensor sends the detected heart rate and respiratory rate to the first processor.

[0046] The blood pressure value obtained by the above formula can improve the stability and accuracy of the blood pressure model by introducing heart rate and respiratory rate, making the measured blood pressure value more accurate.

[0047] In one embodiment, referring to Figure 1b and Figure 3 The second main body may include a plurality of finger petals 21, two adjacent finger petals 21 are connected by an elastic connector 26, and the second sensor 22 is disposed in one of the finger petals 21. When the second main body is put on a finger, the elastic connector 26 has a certain elasticity, so that the distance between two adjacent finger petals 21 can be adjusted, so that the second main body can be put on fingers of different thicknesses; in addition, the provision of the elastic connector 26 can also make it easier for the second main body to be placed in the accommodation space 12.

[0048] It should be noted that the number of finger petals 21 can be 6 to 8, so that multiple finger petals 21 can be adapted to the fingers of different users; the elastic connector 26 can specifically be a spring or an elastic rope. When the elastic connector 26 is a spring, a spring can be provided between two adjacent finger petals 21, and one spring connects the two finger petals 21. Since the material of the spring is generally a metal material, when the spring connects the two adjacent finger petals 21, an electric current can also pass between the two adjacent finger petals 21. When the two adjacent finger petals 21 are connected by an elastic rope, a metal wire can also be provided inside the elastic rope, and the two ends of the metal wire are respectively connected to the two finger petals 21, so that an electric current can pass between the two adjacent finger petals 21.

[0049] In one embodiment, the second main body may further include a plurality of functional modules, and at least part of the finger petals 21 are provided with functional modules. Specifically, the functional module may include at least one of a second processor 23, a second wireless module (not shown in the figure), and a battery 24. When the functional module only includes the second processor 23, the second processor 23 can be set in any one of the finger petals 21, and the second processor 23 can store the above-mentioned model parameters. At this time, the second sensor 22 can be set in any one of the multiple finger petals 21, that is, the second sensor 22 and the second processor 23 can be set in two different finger petals 21, and the second sensor 22 and the second processor 23 can also be set in the same finger petal 21. At this time, the finger petal 21 provided with the second sensor 22 and the second processor 23 can be connected to the first processor in the first main body 11 through a connecting line; when detecting the blood pressure of the human body, the second sensor 22 transmits the detected photoplethysmogram signal of the finger and the model parameters stored in the second processor 23 to the first processor through the connecting line (the model parameters can also be stored in the first processor), and the first processor also receives the photoplethysmogram signal of the wrist detected by the first sensor, thereby obtaining the blood pressure value of the human body.

[0050] The functional module may also only include the second processor 23 and the second wireless module. In this case, the second processor 23, the second wireless module and the second sensor 22 may be arranged in the same finger petal 21, or the second processor 23, the second wireless module and the second sensor 22 may be arranged in different finger petals 21, or any two of the second processor 23, the second wireless module and the second sensor 22 may be arranged in the same finger petal 21, and the other one may be arranged in another finger petal 21. In this case, the second processor 23 and the second sensor 22 are both connected to the second wireless module, and the second sensor 22 may transmit the detected photoplethysmogram signal of the finger to the second wireless module, the second processor 23 may transmit the stored model parameters to the second wireless module, and the second wireless module transmits the photoplethysmogram signal of the finger and the model parameters to the first processor of the first main body 11. Since the first processor also receives the photoplethysmogram signal of the wrist detected by the first sensor, the blood pressure value of the human body is obtained.

[0051] In addition, the functional module may also include a second processor 23, a second wireless module and a battery 24, wherein the second processor 23, the second wireless module, the battery 24 and the second sensor 22 may be arranged in the same finger petal 21, or the second processor 23, the second wireless module, the second sensor 22 and the battery 24 are arranged in different finger petals 21, or any two of the second processor 23, the second wireless module, the second sensor 22 and the battery 24 are arranged in the same finger petal 21, and the other two are arranged in different finger petals 21 or in the same finger petal 21; furthermore, any three of the second processor 23, the second wireless module, the second sensor 22 and the battery 24 are arranged in the same finger petal 21, and the other one is arranged in a different finger petal 21. In the specific implementation process, the second processor 23, the second wireless module and the second sensor 22 can be set in the same finger flap 21, and the battery 24 can be set in another finger flap. In this setting mode, the second sensor 22 can conveniently transmit the detected light volume change tracing signal of the finger to the second wireless module, and the second processor 23 can also conveniently send the stored model parameters to the second wireless module, and the battery 24 can power the second wireless module, the second processor 23 and the second sensor 22 through the elastic connector 26, so that the second wireless module, the second sensor 22 and the second processor 23 can work continuously and stably, and no external lead wire is required to power them, thereby improving the convenience and sustainability of the use of the finger detection device 20. In this way, the second wireless module transmits the light volume change tracing signal of the finger and the model parameters to the first processor of the first main body 11. Since the first processor also receives the light volume change tracing signal of the wrist detected by the first sensor, the blood pressure value of the human body is obtained.

[0052] It should be noted that, in order to enable the second sensor to conveniently detect the photoplethysmographic signal of the finger, a protrusion may be provided on the finger flap where the second sensor is provided.

[0053] In one embodiment, continue to refer to Figure 1b and Figure 3 In order to make the second main body part fit tightly against the skin of the finger when the second main body part is put on the finger, two magnets 25 may be provided on each finger petal 21, and the magnetic poles of the two magnets 25 close to each other on two adjacent finger petals 21 are opposite, so that when the second main body part is put on the finger, there is an attraction between the two adjacent finger petals 21, so that each finger petal 21 in the second main body part can fit tightly against the finger.

[0054] In the above-mentioned embodiment, the finger detection device may be a smart ring, so that the smart ring can interact with a smart watch to measure the user's blood pressure.

[0055] In one embodiment, referring to Figure 4 The first main body may include a housing 110, a dial 111 and a first wireless module, wherein the first wireless module, the first sensor and the first processor are all arranged in the dial 111, and the first wireless module is connected to the second wireless module, the first processor and the first sensor signal. The first wireless module can transmit the finger photoplethysmogram signal and the model parameters transmitted by the second wireless module to the first processor, and the first sensor also transmits the detected wrist photoplethysmogram signal to the first processor to obtain the blood pressure value of the human body, and the blood pressure value can be displayed on the dial. In the specific implementation process, the model parameters are also set in the first processor, as long as the first processor can obtain the model parameters, the wrist photoplethysmogram signal and the finger photoplethysmogram signal and obtain the blood pressure value.

[0056] It should be noted that the housing 110 may also be provided with a groove on the side away from the wrist, and the dial 111 is arranged in the groove. There is a gap between the dial and the inner wall of the groove, and the gap forms a accommodating space 12 for accommodating the finger flap 21. In this way, when the blood pressure value of the human body is not detected, the finger detection device 20 can be placed in the accommodating space, which can improve the portability of the finger detection device 20.

[0057] In one embodiment, in order to improve the endurance of the finger detection device 20, at least one charging station 120 may be provided in the storage space 12. The charging station 120 may cooperate with the finger flap 21 provided with a battery, and then the battery may be charged, so that when the finger detection device 20 detects the finger, each functional module in the finger detection device 20 has sufficient power, thereby ensuring that the user can measure his or her blood pressure at any time. In addition, a station for accommodating a first sensor may be provided in the storage space 12. Since the station for accommodating the finger flap provided with the first sensor has a protrusion, the station for accommodating the finger flap 21 is different from other stations, so that the finger detection device 20 can be conveniently arranged in the storage space 12.

[0058] In the above embodiment, the wrist detection device may further include a cover 13, which is disposed on the side of the housing 110 away from the wrist, and one end of the cover 13 is rotatably connected to the side of the housing 110 away from the wrist, and the side of the housing 110 away from the wrist is further provided with a first clamping portion, and the cover 13 is provided with a second clamping portion that cooperates with the first clamping portion, and the first clamping portion and the second clamping portion are connected to connect the cover 13 to the housing 110. In this way, when the blood pressure is not detected and the finger detection device is placed in the accommodation space 12, the cover is rotated to make the first clamping portion cooperate with the second clamping portion, so that the finger detection device is stably placed in the accommodation space 12, and the finger detection device 20 is prevented from being lost from the accommodation space 12 to the outside.

[0059] In one embodiment, continue to refer to Figure 4 and Figure 5 In the specific implementation process, a handheld device 30 connected to the wrist detection device 10 can also be included. The handheld device 30 can be connected to the first wireless module in the wrist detection device 10. The first wireless module can transmit the blood pressure value obtained by the first processor to the handheld device 30. The blood pressure value can be displayed on the display screen of the handheld device 30. Of course, the blood pressure value can also be displayed on the display screen of the wrist detection device. Among them, the handheld device can be a mobile phone or a tablet computer. Setting the handheld device 30 as a mobile phone or a tablet computer can be convenient for the user to carry, thereby improving the convenience of detection. In addition, the handheld device 30 can also be connected to the second wireless module signal in the finger detection device 20, and then receive information in the finger detection device.

[0060] Reference Figure 6 Measuring blood pressure using the wearable blood pressure measuring device includes the following steps:

[0061] S10: The user separates the finger detection device from the wrist detection device, and puts the finger detection device on the finger, and the wrist detection device on the wrist;

[0062] S20: The first processor in the wrist detection device obtains a wrist photoplethysmogram signal, a finger photoplethysmogram signal and a model parameter;

[0063] S30: The first processor obtains a blood pressure value according to the wrist photoplethysmogram signal, the finger photoplethysmogram signal and the model parameters.

[0064] When measuring blood pressure values ​​in the above manner, the finger detection device and the wrist detection device can be regarded as a whole and worn on the wrist. The user can remove the finger detection device at any time to complete the measurement of his or her own blood pressure, thereby improving the convenience of blood pressure detection.

[0065] The step of obtaining a blood pressure value according to the wrist photoplethysmogram signal, the finger photoplethysmogram signal and the model parameter comprises:

[0066] The first sensor collects the photoplethysmogram signal of the wrist within a first time period, obtains the timestamp of the peak feature point of the photoplethysmogram signal of the wrist within the first time period, and transmits the obtained timestamp of the peak feature point of the photoplethysmogram signal of the wrist within the first time period to the first processor; the second sensor collects the photoplethysmogram signal of the finger within the first time period, obtains the timestamp of the peak feature point of the photoplethysmogram signal of the finger within the first time period, and transmits the obtained timestamp of the peak feature point of the photoplethysmogram signal of the finger to the first processor of the wrist detection device, the first processor obtains the pulse wave transmission time, pulse wave velocity, heart rate and respiratory rate according to the timestamp of the peak feature point of the photoplethysmogram signal of the wrist within the first time period and the timestamp of the peak feature point of the photoplethysmogram signal of the finger within the first time period, and then calculates the model parameters through the regression model;

[0067] The first processor brings the model parameters as well as the pulse wave velocity, the heart rate and the respiratory rate into a preset formula to obtain the blood pressure value.

[0068] The first duration may be 10s, 20s or 30s, etc.

[0069] Reference Figure 7 , the following is a detailed description taking the first time length of 10s and the wrist detection device being a smart watch and the finger detection device being a smart bracelet as an example;

[0070] When starting the test, the user separates the smart ring from the smart watch, wears the smart ring on the finger, and wears the smart watch on the wrist;

[0071] The user synchronously activates the first sensor in the smart watch and the second sensor in the smart bracelet;

[0072] The first processor of the smart watch acquires a photoplethysmogram signal of the wrist detected by the first sensor within 10 seconds, and extracts a timestamp of a peak feature point of the photoplethysmogram signal of the wrist;

[0073] The first processor acquires a photoplethysmogram signal of a finger detected by a second sensor within 10 seconds, and extracts a timestamp of a peak feature point of the photoplethysmogram signal of the finger;

[0074] The first processor can obtain the pulse wave velocity between the photoplethysmogram signal of the wrist obtained by the first sensor in the smart watch and the photoplethysmogram signal of the finger obtained by the second sensor in the smart ring according to the above parameters, and can obtain the values ​​of the heart rate and the respiratory rate;

[0075] The first processor obtains the blood pressure value based on the calibrated model parameters and the pulse wave velocity, heart rate and respiratory rate;

[0076] If the measurement is terminated, the user stores the smart ring in the smart watch to end the measurement;

[0077] If the measurement is not terminated, the user repeats the above process to achieve continuous blood pressure monitoring.

[0078] Reference Figure 8 In the above embodiment, the model parameters can be obtained in the following way:

[0079] Specifically, the user takes the smart ring out of the smart watch, puts the smart ring on the finger, and puts the smart watch on the wrist;

[0080] Synchronously start the first sensor in the smart watch and the second sensor in the smart bracelet;

[0081] The first processor acquires a photoplethysmogram signal of the wrist detected by the first sensor within 30 seconds, and extracts a timestamp of a peak feature point of the photoplethysmogram signal of the wrist;

[0082] The first processor acquires a photoplethysmogram signal of a finger detected by a second sensor within 30 seconds, and extracts a timestamp of a peak feature point of the photoplethysmogram signal of the finger;

[0083] The first processor can obtain the pulse wave velocity between the photoplethysmogram signal of the wrist acquired by the first sensor in the smart watch and the photoplethysmogram signal of the finger acquired by the second sensor in the smart ring according to the above parameters;

[0084] Use a gold standard blood pressure meter to measure and record blood pressure values ​​during the above time periods;

[0085] A regression model is calculated based on the pulse wave velocity, heart rate, respiratory rate and blood pressure values ​​in the above time period to obtain model parameters;

[0086] Repeat the above steps to determine whether the number of times the model parameters are obtained is greater than or equal to the preset value. If it is greater than or equal to the preset value, the model parameters corrected by the preset value are merged to obtain the final blood pressure value model parameters; if the number of times the model parameters are obtained is less than the preset value, repeat the above steps until the number of times the model parameters are obtained is greater than or equal to the preset value. The preset value can be 3, 4, 5 or 6, etc.

[0087] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wearable blood pressure measuring device, characterized in that: include: Wrist detection device and finger detection device; The wrist detection device comprises a first main body portion sleeved on the wrist, and a first sensor and a first processor arranged on the first main body portion, wherein the first sensor is used to detect a photoplethysmogram signal of the wrist and send the detected photoplethysmogram signal of the wrist to the first processor, wherein the first main body portion has a receiving space, and the finger detection device is detachably arranged in the receiving space; The finger detection device includes a second main body mounted on the finger, and a second sensor disposed on the second main body, the second sensor is used to detect a photoplethysmogram signal of the finger, and send the detected photoplethysmogram signal of the finger to the first processor; The first processor obtains a blood pressure value according to the photoplethysmogram signal of the finger, the photoplethysmogram signal of the wrist and a model parameter; The first main body includes a shell, a dial and a first wireless module, wherein a groove is provided on a side of the shell away from the wrist, the dial is arranged in the groove, and the accommodating space is formed between the dial and the inner wall of the groove.

2. The wearable blood pressure measuring device according to claim 1, characterized in that: The second main body includes a plurality of finger petals and a plurality of elastic connectors for connecting two adjacent finger petals, wherein the second sensor is disposed on any one of the finger petals.

3. The wearable blood pressure measuring device according to claim 2, characterized in that: The second main body also includes a plurality of functional modules, and at least part of the finger petals are provided with the functional modules.

4. The wearable blood pressure measuring device according to claim 3, characterized in that: The functional module includes at least one of a second processor, a second wireless module, and a battery.

5. The wearable blood pressure measuring device according to claim 4, characterized in that: When the functional module includes the second processor, the second wireless module and a battery, the battery is connected to the second processor, the second wireless module and the second sensor, the second wireless module is connected to the second processor, the second sensor and the first processor, and the model parameters are stored in the first processor and / or the second processor.

6. The wearable blood pressure measuring device according to any one of claims 2 to 5, characterized in that: Two magnets are arranged on each finger petal, and the magnetic poles of the two magnets close to each other on two adjacent finger petals are opposite.

7. The wearable blood pressure measuring device according to any one of claims 2 to 5, characterized in that: The number of the finger petals is 6 to 8.

8. The wearable blood pressure measuring device according to any one of claims 2 to 5, characterized in that: The finger flap provided with the second sensor has a protruding portion extending away from the finger, and the second sensor is provided on the protruding portion.

9. The wearable blood pressure measuring device according to claim 5, characterized in that: The first processor and the first wireless module are arranged in the dial, the first wireless module is signal-connected with the second wireless module, and the first wireless module is also connected with the first processor and the first sensor.

10. The wearable blood pressure measuring device according to claim 9, characterized in that: At least one charging station is arranged in the accommodating space, and the charging station cooperates with the finger flap provided with the battery to charge the battery.

11. The wearable blood pressure measuring device according to any one of claims 1 to 5, 9 and 10, characterized in that: It also includes a handheld terminal device, which is connected to the wrist detection device by signal.

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