Wearable device, blood pressure measuring method and related device

Abstract

The invention discloses wearable equipment, a blood pressure measuring method and a related device, and belongs to the field of data processing. The method comprises the steps of obtaining an ultrasonic data set collected by at least one sensor array, determining blood vessel state information corresponding to at least one artery blood vessel based on the ultrasonic data set collected by the at least one sensor array, obtaining a first pressure data set collected by the at least one sensor array, and determining the blood vessel state information corresponding to the at least one artery blood vessel based on the first pressure data set. Based on the first pressure data set collected by the at least one sensor array and the blood vessel state information corresponding to the at least one artery blood vessel, the first blood pressure of the user is determined. The blood pressure of the user is determined and obtained based on the blood vessel state of the user and the first pressure data set collected by the sensor array in the pressurization or decompression process of the pressure assembly, so that the accuracy of blood pressure measurement can be further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of data processing, and in particular to a wearable device, a blood pressure measurement method and related devices. BACKGROUND

[0002] As the channel for blood transportation in human body, blood vessels are responsible for delivering nutrients and oxygen to all tissues and organs of the body, and also for carrying metabolic waste and carbon dioxide back to the heart for excretion out of the body. Therefore, the state of blood vessels directly affects the normal operation of the body and the accuracy of physiological parameters (such as blood pressure, pulse, etc.) detection. The state of blood vessels includes blood vessel depth, blood vessel wall thickness, blood vessel diameter, etc.

[0003] Taking blood pressure as an example, when the blood vessel wall thickens, it may lead to changes in the mechanical properties of the blood vessel, thereby making the blood pressure measurement result higher. At present, in order to avoid the influence of the state of blood vessels on the accuracy of blood pressure measurement result, the state of blood vessels is usually estimated according to the body fat rate, age and other coefficients of the measurer, and then the blood pressure measurement result is compensated according to the estimated state of blood vessels.

[0004] However, due to the huge difference in blood vessel depth and skin tissue of different individuals, the state of blood vessels obtained by the above-mentioned estimation of the state of blood vessels only through the body fat rate and age of the measurer cannot accurately reflect the true state of blood vessels of the measurer, ultimately resulting in low accuracy of the compensated blood pressure measurement result. SUMMARY

[0005] The present application provides a wearable device, a blood pressure measurement method and related devices, which can improve the accuracy of the determined state of blood vessels. The technical solution is as follows:

[0006] In a first aspect, a wearable device is provided, which includes a wearing strap, a pressure assembly, at least one sensor array and a processor; the pressure assembly is located on the inner side of the wearing strap, and the pressure assembly is distributed along the length direction of the wearing strap; the at least one sensor array is located on the side of the pressure assembly away from the wearing strap, and when a user wears the wearable device, the at least one sensor array corresponds to the position of at least one arterial blood vessel of the user; the sensor array includes a plurality of sensor assemblies, the sensor assembly includes an absolute pressure sensing unit and at least one ultrasonic sensing unit, and the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure assembly; the absolute pressure sensing unit is used to collect the pressure borne by the corresponding arterial blood vessel, the ultrasonic sensing unit is used to collect ultrasonic data, and the processor is used to determine the state of blood vessels of the user based on the pressure data set and the ultrasonic data set collected by the at least one sensor array.

[0007] Since the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure assembly, that is, the ultrasonic sensing unit and the absolute pressure sensing unit are placed in a stacked manner, thus, on the basis of the wearable device having both the absolute pressure sensing unit and the ultrasonic sensing unit, the number of the two types of sensing units in the unit size, that is, the resolution of the two types of sensing units in space, can be ensured. The application determines the blood vessel state of the user by using the pressure data set and the ultrasonic data set collected by the at least one sensor array when the user wears the wearable device, thus, the pressure data set and the ultrasonic data set can reflect the real blood vessel state, thereby further improving the accuracy of the determined blood vessel state. Moreover, since the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure assembly, that is, the at least one ultrasonic sensing unit is closer to the skin of the user relative to the absolute pressure sensing unit when the user wears the wearable device, thus, the ultrasonic wave emitted by the ultrasonic sensing unit and the detected echo will not be disturbed by the absolute pressure sensing unit, thereby effectively ensuring the accuracy of the ultrasonic data collected by the ultrasonic sensing unit.

[0008] Optionally, the ultrasonic sensing unit comprises a signal electrode, a piezoelectric material and a ground electrode; the absolute pressure sensing unit comprises a signal electrode, a separation material and a ground electrode; the piezoelectric material is located between the signal electrode of the ultrasonic sensing unit and the ground electrode of the ultrasonic sensing unit, and the separation material is located between the signal electrode of the absolute pressure sensing unit and the ground electrode of the absolute pressure sensing unit.

[0009] Optionally, the ground electrode of the absolute pressure sensing unit and the ground electrode of the at least one ultrasonic sensing unit are the same electrode.

[0010] Since the ultrasonic sensing unit and the absolute pressure sensing unit share the same ground electrode, thus, the ground electrodes of the ultrasonic sensing unit and the absolute pressure sensing unit do not need to be connected respectively, thereby effectively reducing the complexity of the processing of the sensor assembly and reducing the hardware cost.

[0011] Optionally, the plane in which the ground electrodes of part or all of the at least one ultrasonic sensing unit are located is not parallel to the plane in which the ground electrode of the absolute pressure sensing unit is located.

[0012] Since the closer the angle between the ultrasonic direction and the blood flow direction is to 0 degrees, the more accurate the blood flow velocity is, the application reduces the angle between the ultrasonic direction and the blood flow direction by making the plane where the ground electrode of at least one ultrasonic sensing unit and the ground electrode of the absolute pressure sensing unit are located not parallel, so that the blood flow velocity can be calculated more simply and accurately, thereby reducing the computing power required to determine the blood flow velocity and the energy consumption of the processor.

[0013] Optionally, the sum of the sizes of the at least one ultrasonic sensing unit in the horizontal direction is not greater than the size of the absolute pressure sensing unit in the horizontal direction, and the sum of the sizes of the at least one ultrasonic sensing unit in the vertical direction is not greater than the size of the absolute pressure sensing unit in the vertical direction.

[0014] Optionally, the size of the absolute pressure sensing unit in the horizontal direction is not greater than 2 millimeters, and the size of the absolute pressure sensing unit in the vertical direction is not greater than 2 millimeters.

[0015] Optionally, the piezoelectric material is piezoelectric ceramic, piezoelectric film or piezoelectric crystal.

[0016] Optionally, in the case where the absolute pressure sensing unit is a pressure-capacitance pressure sensor, the separation material is a dielectric material; in the case where the absolute pressure sensing unit is a pressure-resistance pressure sensor, the separation material is a pressure-resistance material.

[0017] Optionally, the sensor assembly further comprises a packaging layer and a substrate; the packaging layer is located on the side of the at least one ultrasonic sensing unit away from the pressure assembly, and the packaging layer is used to protect the electrical structure inside the sensor assembly and provide a moisture-proof barrier; the substrate is located on the side of the absolute pressure sensing unit close to the pressure assembly, and the substrate is electrically connected with the absolute pressure sensing unit and the at least one ultrasonic sensing unit, and the substrate is used to connect with the corresponding circuit of the processor.

[0018] Optionally, the plane where the signal electrode of the absolute pressure sensing unit is located is not parallel to the side of the substrate away from the pressure assembly.

[0019] By placing the absolute pressure sensing unit obliquely, the ultrasonic sensing unit is also obliquely placed, so as to reduce the angle between the ultrasonic direction and the blood flow direction, so that the blood flow velocity can be calculated more simply and accurately, thereby reducing the computing power required to determine the blood flow velocity and the energy consumption of the processor.

[0020] Optionally, the thickness of the packaging layer is an odd multiple of one-fourth of the wavelength of the ultrasonic wave emitted by the ultrasonic sensing unit.

[0021] Since the ultrasonic wave will be reflected and transmitted at the interface of two media when it propagates from one medium to another, according to the interference principle of sound waves, when the thickness of the encapsulation layer is an odd multiple of one quarter of the wavelength of the ultrasonic wave, the ultrasonic wave will be superimposed or canceled in phase inside the encapsulation layer, and when the thickness of the encapsulation layer is an odd multiple of one quarter of the wavelength, the ultrasonic wave will be canceled at the interface of the two substances on both sides of the encapsulation layer, thereby reducing the reflection of the ultrasonic wave on both sides of the encapsulation layer, improving the propagation efficiency and detection accuracy of the ultrasonic signal.

[0022] Optionally, the material of the encapsulation layer is polydimethylsiloxane or polybutylene succinate-terephthalate.

[0023] Since the Young's modulus and thickness of the encapsulation layer directly affect the mechanical properties and response sensitivity of the absolute pressure sensing unit, for the Young's modulus of the encapsulation layer, a higher Young's modulus will make the encapsulation layer have higher stiffness and be able to withstand greater external force without significant deformation, which helps to improve the measurement accuracy and stability of the absolute pressure sensing unit. However, too high Young's modulus will also make the absolute pressure sensing unit too rigid when subjected to impact or vibration, thereby affecting the spatial resolution of the absolute pressure sensing array. For the thickness of the encapsulation layer, a thinner encapsulation layer can reduce the overall size and weight of the sensor assembly, and improve the response speed and sensitivity of the absolute pressure sensing unit. However, a too thin encapsulation layer cannot provide sufficient mechanical strength and durability, and is prone to deformation or damage when subjected to external force. While a thicker encapsulation layer can provide better mechanical protection, it will also increase the volume and weight of the sensor assembly, and reduce the response speed and sensitivity of the absolute pressure sensing unit. Based on the above reasons, when designing the Young's modulus and thickness of the encapsulation layer, the mechanical transmission performance of the pressure sensing unit needs to be considered, and by optimizing these two parameters of the encapsulation layer, the mechanical properties and transmission efficiency of the absolute pressure sensing unit can be improved, thereby meeting the needs of different application scenarios.

[0024] Optionally, the substrate is a flexible substrate, and the circuit trace of the flexible substrate has a serpentine trace.

[0025] Since the flexible substrate can be bent, folded, twisted, compressed, stretched, or even deformed into any shape, when the trace of the conductive circuit (i.e. the circuit) on the flexible substrate has a serpentine trace, the bending performance of the circuit can be improved, thereby ensuring that the circuit on the flexible substrate can better adapt to the deformation of the flexible substrate, thereby ensuring the stability of the sensor assembly.

[0026] Optionally, the material of the substrate is polyimide or polyester film.

[0027] Optionally, the column direction of the sensor array is the same as the flow direction of the corresponding arterial blood vessel, and the plurality of sensor assemblies are arranged in an M-row-by-N-column manner, M is an integer greater than or equal to 1, and N is an integer greater than 1.

[0028] Optionally, the sensor assemblies of adjacent two rows in the plurality of sensor assemblies are staggered.

[0029] Optionally, the at least one sensor array includes a first array corresponding to a radial artery blood vessel and / or a second array corresponding to an ulnar artery blood vessel.

[0030] Optionally, the wearable device further includes a memory for storing a computer program for executing the blood pressure measurement method provided in the second aspect. The processor is configured to execute the computer program stored in the memory to implement the blood pressure measurement method in the second aspect.

[0031] Optionally, the wearable device can further include a communication bus for establishing a connection between the processor and the memory.

[0032] In a second aspect, a blood pressure measurement method using the wearable device of the first aspect is provided, and the method includes: acquiring a plurality of sets of ultrasonic data collected by the at least one sensor array, the sets of ultrasonic data being collected by the corresponding sensor array when the corresponding sensor array is close to the skin of the user and the deformation of the corresponding arterial blood vessel is less than a deformation threshold; determining blood vessel state information corresponding to the at least one arterial blood vessel based on the sets of ultrasonic data collected by the at least one sensor array; acquiring a first set of pressure data collected by the at least one sensor array, the first set of pressure data being collected by the plurality of absolute pressure sensing units included in the corresponding sensor array during the pressurization or depressurization of the pressure assembly; and determining a first blood pressure of the user based on the first set of pressure data collected by the at least one sensor array and the blood vessel state information corresponding to the at least one arterial blood vessel.

[0033] Since the blood pressure of the user is determined based on the blood vessel state of the user and the first set of pressure data collected by the sensor array during the pressurization or depressurization of the pressure assembly, the accuracy of blood pressure measurement can be further improved.

[0034] Optionally, the ultrasound data set comprises ultrasound data respectively collected by a plurality of ultrasound sensing units comprised in the corresponding sensor array. In this case, based on the ultrasound data set respectively collected by the at least one sensor array, the effective ultrasound sensing unit corresponding to the at least one sensor array is determined from the ultrasound sensing units comprised in the at least one sensor array, the ultrasound data collected by the effective ultrasound sensing unit is able to effectively represent the arterial blood vessel state of the user, and the blood vessel state information corresponding to the at least one arterial blood vessel is determined based on the ultrasound data collected by the effective ultrasound sensing unit corresponding to the at least one sensor array.

[0035] Based on the ultrasound data collected by each ultrasound sensing unit in the first sensor array, the candidate blood vessel diameter corresponding to each ultrasound sensing unit in the first sensor array is determined, the first sensor array is any one of the at least one sensor array, the ultrasound sensing unit with the largest candidate blood vessel diameter corresponding to the first sensor array is determined as the effective ultrasound sensing unit corresponding to the first sensor array, and the blood vessel state information corresponding to the first arterial blood vessel is determined based on the ultrasound data collected by the effective ultrasound sensing unit corresponding to the first sensor array, the first arterial blood vessel being the arterial blood vessel corresponding to the first sensor array.

[0036] Optionally, the blood vessel state information comprises at least one of the following: the depth of the arterial blood vessel, the diameter of the arterial blood vessel, the blood vessel wall thickness of the arterial blood vessel, and the blood flow velocity of the arterial blood vessel.

[0037] After determining the blood vessel state information corresponding to the at least one arterial blood vessel, the pressure component in the wearable device is capable of pressurizing and depressurizing at a target rate, or pressurizing and then depressurizing at a target rate, or pressurizing at a target rate and then depressurizing at a target rate. That is, there is at least one process in which the pressure of the pressure component in the wearable device changes at a target rate during the pressurization and depressurization processes, and the at least one sensor array is capable of collecting a pressure data set during the process in which the pressure applied by the pressure component changes at a target rate.

[0038] Optionally, based on the first pressure data set collected by the at least one sensor array and the blood vessel state information corresponding to the at least one arterial blood vessel, the arterial pressure data corresponding to the at least one arterial blood vessel is determined, and based on the arterial pressure data corresponding to the at least one arterial blood vessel, the first blood pressure of the user is determined.

[0039] Optionally, the first pressure data set comprises first pressure data collected by an effective pressure sensing unit, the first pressure data comprising first pressure data at a plurality of time points, the effective pressure sensing unit being an absolute pressure sensing unit comprised in a sensor assembly in which the target ultrasonic sensing unit is located in the first sensor array. In this case, the arterial pressure data corresponding to the first blood vessel is determined based on the first pressure data collected by the effective pressure sensing unit in the first sensor array and the blood vessel state information corresponding to the first arterial blood vessel.

[0040] After determining the first blood pressure of the user based on the first pressure data set collected by the at least one sensor array and the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the wearable device is further capable of determining a static pressure corresponding to the first blood pressure of the user based on the first blood pressure of the user and the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the static pressure being a pressure applied by the pressure assembly when the blood pressure of the user reaches the first blood pressure, adjusting the pressure applied by the pressure assembly to be the first pressure based on the static pressure, obtaining a second pressure data set collected by the at least one sensor array at at least one time point respectively, the second pressure data set being collected by a plurality of absolute pressure sensing units comprised in the corresponding sensor array under the condition that the pressure applied by the pressure assembly remains the first pressure, and determining a second blood pressure corresponding to the user at at least one time point based on the second pressure data set collected by the at least one sensor array at at least one time point respectively and the blood vessel state information corresponding to the at least one arterial blood vessel respectively.

[0041] In the case where the first blood pressure and the blood vessel state information are determined, the continuous measurement of blood pressure can be realized by the method provided in the present application, that is, the blood pressure does not need to be determined by the pressure assembly in the manner of pressurization or depressurization at a certain rate, but the second blood pressure can be obtained based on the second pressure data set collected by the sensor array and the blood vessel state information, so that the blood pressure measurement steps can be reduced, the measurement efficiency can be improved, and the accuracy of blood pressure measurement can be ensured.

[0042] The wearable device is further capable of determining a blood pressure difference value corresponding to at least one time point respectively based on the second blood pressure corresponding to the at least one time point, the blood pressure difference value being a difference between the first blood pressure and the second blood pressure at the corresponding time point respectively, and if at least one blood pressure difference value in the blood pressure difference values corresponding to the at least one time point respectively is greater than a difference threshold value, re-obtaining the ultrasonic data set collected by the at least one sensor array respectively. Otherwise, re-obtaining the second pressure data set collected by the at least one sensor array at at least one time point respectively.

[0043] If there is at least one blood pressure difference value greater than the difference threshold value in the blood pressure difference values corresponding to the at least one time point, it indicates that the second blood pressure at the at least one time point is greatly different from the first blood pressure, and the measurement result of the second blood pressure is not accurate. Therefore, the ultrasound data set collected by the at least one sensor array at the at least one time point can be reacquired to re-determine the blood vessel state information. If there is no blood pressure difference value greater than the difference threshold value in the blood pressure difference values corresponding to the at least one time point, it indicates that the second blood pressure at the at least one time point is less different from the first blood pressure, and the measurement result of the second blood pressure is accurate. Therefore, the second pressure data set collected by the at least one sensor array at the at least one time point can be reacquired to determine the second blood pressure of the user at a subsequent time point.

[0044] In a third aspect, a blood pressure measurement device is provided, which has the functions to implement the blood pressure measurement method in the second aspect. The blood pressure measurement device comprises at least one module for implementing the blood pressure measurement method in the second aspect.

[0045] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program. When the computer program runs on a computer or a processor, the computer or the processor executes the steps of the blood pressure measurement method in the second aspect.

[0046] In a fifth aspect, a computer program product is provided, which contains computer instructions. When the computer instructions run on a computer or a processor, the computer executes the steps of the blood pressure measurement method in the second aspect. Alternatively, a computer program is provided, which, when running on a computer or a processor, causes the computer or the processor to execute the steps of the blood pressure measurement method in the second aspect.

[0047] The technical effects obtained by the third aspect, the fourth aspect and the fifth aspect are similar to the technical effects obtained by the first aspect and the second aspect, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 is a schematic diagram of a wearable device provided by an embodiment of the present application;

[0049] Figure 2 is a schematic diagram of a sensor array provided by an embodiment of the present application;

[0050] Figure 3 is a schematic diagram of an arterial blood vessel provided by an embodiment of the present application;

[0051] Figure 4is a top view of a sensor array a provided by an embodiment of the present application;

[0052] Figure 5 is a side view of a sensor array a provided by an embodiment of the present application;

[0053] Figure 6 is a top view of another sensor array a provided by an embodiment of the present application;

[0054] Figure 7 is a side view of another sensor array a provided by an embodiment of the present application;

[0055] Figure 8 is a schematic view of an ultrasonic sensor unit provided by an embodiment of the present application;

[0056] Figure 9 is a schematic view of an absolute pressure sensor unit provided by an embodiment of the present application;

[0057] Figure 10 is a schematic view of a sensor assembly provided by an embodiment of the present application;

[0058] Figure 11 is a schematic view of another sensor assembly provided by an embodiment of the present application;

[0059] Figure 12 is a schematic view of a first tilt structure provided by an embodiment of the present application;

[0060] Figure 13 is a schematic view of another first tilt structure provided by an embodiment of the present application;

[0061] Figure 14 is a schematic view of a sensor assembly a provided by an embodiment of the present application;

[0062] Figure 15 is a schematic view of a first direction provided by an embodiment of the present application;

[0063] Figure 16 is a schematic view of another first direction provided by an embodiment of the present application;

[0064] Figure 17 is a schematic view of another sensor assembly provided by an embodiment of the present application;

[0065] Figure 18 is a schematic view of an absolute pressure sensor unit provided by an embodiment of the present application;

[0066] Figure 19 is a schematic view of a second tilt structure provided by an embodiment of the present application;

[0067] Figure 20is a schematic diagram of a flexible substrate provided by an embodiment of the present application;

[0068] Figure 21 is a schematic diagram of an arrangement of a sensor array provided by an embodiment of the present application;

[0069] Figure 22 is a schematic diagram of another arrangement of a sensor array provided by an embodiment of the present application;

[0070] Figure 23 is a schematic diagram of another sensor array provided by an embodiment of the present application;

[0071] Figure 24 is a structural schematic diagram of a watch provided by an embodiment of the present application;

[0072] Figure 25 is a structural schematic diagram of another wearable device provided by an embodiment of the present application;

[0073] Figure 26 is a flowchart of a blood pressure measurement method provided by an embodiment of the present application;

[0074] Figure 27 is a flowchart of another blood pressure measurement method provided by an embodiment of the present application;

[0075] Figure 28 is a structural schematic diagram of a blood pressure measurement device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0076] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0077] In order to facilitate understanding, before the wearable device and the blood pressure measurement method provided by the embodiments of the present application are explained in detail, the application scenarios related to the embodiments of the present application are introduced.

[0078] As a channel for transporting blood in the human body, blood vessels are responsible for transporting nutrients and oxygen to various tissues and organs of the body, and also transporting metabolic waste and carbon dioxide back to the heart to be discharged out of the body. Therefore, the state of blood vessels directly affects the normal operation of the body and the accuracy of physiological parameter (such as blood pressure, pulse, etc.) detection. The state of blood vessels includes blood vessel depth, blood vessel wall thickness, etc.

[0079] Next, take blood pressure as an example. The blood pressure of the human body is the lateral pressure generated by the pulsating blood flow in the blood vessel on the blood vessel wall, that is, the pressure perpendicular to the blood vessel wall. Among them, the peak value of the pressure is the systolic pressure, which can also be called high pressure, and the valley value of the pressure is the diastolic pressure, which can also be called low pressure. Blood pressure is an important indicator of health monitoring, which can be used to assess the health status of the human body and the changes of the condition of critically ill patients. For example, the high and low of blood pressure can reflect whether multiple indicators such as heart function, blood flow, blood volume, and vasomotor function are normal. When the blood pressure abnormally rises or falls, it means that the above indicators may be abnormal. Sudden blood pressure drop may be caused by insufficient blood volume, abnormal vasodilation or severe damage to heart function. In addition, if the blood pressure is long-term high or low, it may also cause greater damage to the blood vessels and multiple organs of the whole body, therefore, regular blood pressure measurement is very important, which can early detect chronic diseases such as hypertension, take timely measures for intervention to avoid disease deterioration, and also can timely detect low blood pressure to prevent accidents. For hypertensive patients, regular blood pressure measurement is also helpful for doctors to adjust the treatment plan according to the measurement results, so as to achieve better treatment effect. However, when the blood vessel wall thickens, it will cause the lumen to narrow and increase the blood flow resistance, so that the blood pressure measurement result is high.

[0080] In related technologies, especially in wearable blood pressure detection, in order to avoid the influence of the blood vessel state on the accuracy of the blood pressure measurement result, the blood vessel state is usually estimated according to the body fat rate, age and other coefficients of the measurer, and then the blood pressure measurement result is compensated according to the estimated blood vessel state. However, due to the huge difference in blood vessel depth and skin tissue of different individuals, the blood vessel state obtained by estimating the blood vessel state only through the body fat rate and age of the measurer cannot accurately reflect the real blood vessel state of the measurer, which ultimately leads to low accuracy of the compensated blood pressure measurement result.

[0081] Based on this, this application provides a wearable device and a blood pressure measurement method using the wearable device. The wearable device includes a wearable strap, a pressure component, at least one sensor array, and a processor. The sensor component in the sensor array includes an absolute pressure sensing unit and at least one ultrasonic sensing unit. The absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure component. That is, the ultrasonic sensing unit and the absolute pressure sensing unit are stacked. This ensures that the wearable device has both absolute pressure sensing units and ultrasonic sensing units without sacrificing the number of these two types of sensing units per unit size, i.e., without sacrificing the spatial resolution of these two types of sensing units. This application uses pressure and ultrasound datasets collected by at least one sensor array when the user wears the wearable device to specifically determine the user's vascular state. This ensures that the pressure and ultrasound datasets reflect the true vascular state, thereby further improving the accuracy of the determined vascular state. Since the user's blood pressure is determined based on the user's vascular state and the first pressure datasets collected by the sensor array during the pressurization or depressurization of the pressure component, the accuracy of blood pressure measurement can be further improved.

[0082] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a wearable device provided in an embodiment of this application. The wearable device includes a wearable strap 01, a pressure component 02, and at least one sensor array 03. Figure 1 The at least one sensor array is schematically represented by two sensor arrays and a processor. Figure 1 (Not shown in the image).

[0083] The pressure component 02 is located inside the wearable strip 01 and is distributed along the length of the wearable strip 01. The at least one sensor array 03 is located on the side of the pressure component 02 away from the wearable strip 01. When the user wears the wearable device, the at least one sensor array corresponds to the position of at least one artery of the user.

[0084] For example, please refer to Figure 2 , Figure 2 This is a schematic diagram of a sensor array provided in an embodiment of this application. The at least one sensor array includes sensor array 03a and sensor array 03b. Sensor array 03a and sensor array 03b are located on the side of the pressure assembly 02 away from the wear strap 01. Please refer to... Figure 3 , Figure 3is a schematic diagram of an arterial blood vessel provided by an embodiment of the present application. When a user wears the wearable device, the sensor array 03a corresponds to the position of the arterial blood vessel 1 of the user, and the sensor array 03b corresponds to the position of the arterial blood vessel 2 of the user.

[0085] In some embodiments, the pressure component 02 can be an inflation component or an instrument structure, and the embodiments of the present application do not limit this.

[0086] Optionally, in the case where the pressure component 02 is an inflation component, the inflation component includes a gas pump and a gas bag. In the case where the wearing strip 01 and the gas bag are two independent components, the gas bag is located on the inner side of the wearing strip 01. Of course, in actual application, the wearing strip 01 and the gas bag can also be an integral whole, and the gas bag is located inside the wearing strip. When a user wears the wearable device, the at least one sensor array 03 is located on the side of the wearing strip 01 that can contact the skin of the user.

[0087] In some embodiments, for any one of the at least one sensor array 03, the sensor array 03 includes a plurality of sensor components, each sensor component includes an absolute pressure sensing unit and at least one ultrasonic sensing unit, the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure component, the absolute pressure sensing unit is used to collect the pressure borne by the corresponding arterial blood vessel, the ultrasonic sensing unit is used to collect ultrasonic data, and the processor is used to determine the blood vessel state of the user based on the pressure data set and the ultrasonic data set collected by the at least one sensor array. Optionally, the ultrasonic sensing unit can be an ultrasonic transducer.

[0088] Since the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure component, that is, the at least one ultrasonic sensing unit is closer to the skin of the user relative to the absolute pressure sensing unit when the user wears the wearable device. In this way, it can be ensured that the ultrasonic waves emitted by the ultrasonic sensing unit and the echoes detected by the ultrasonic sensing unit will not be disturbed by the absolute pressure sensing unit, thereby effectively ensuring the accuracy of the ultrasonic data collected by the ultrasonic sensing unit.

[0089] It should be noted that in actual application, after the processor obtains the ultrasonic data collected by the ultrasonic sensing unit, the processor can process the ultrasonic data to obtain processed ultrasonic data. Optionally, the processor can process the ultrasonic data into A-mode ultrasonic data according to a related A-mode ultrasonic algorithm, or process the ultrasonic data into B-mode ultrasonic data according to a related B-mode ultrasonic algorithm, and then the processor determines the blood vessel state of the user based on the ultrasonic data set composed of the processed ultrasonic data and the pressure data set.

[0090] For example, in the case of reducing power consumption and computing power requirements, the ultrasonic data can be processed as A-mode ultrasonic data. In the case of sufficient computing power, energy supply and imaging requirements, the ultrasonic data can be processed as B-mode ultrasonic data, which is not limited by the embodiments of the present application.

[0091] For example, if the at least one sensor array 03 includes a sensor array 03a and a sensor array 03b. For example, the sensor array 03a is taken as an example, please refer to Figure 4 , Figure 4 is a top view of a sensor array a provided by an embodiment of the present application, which includes 15 sensor components. Please refer to Figure 5 , Figure 5 is a side view of a sensor array a provided by an embodiment of the present application, from which it can be seen that each sensor component in the sensor array a includes an absolute pressure sensing unit and an ultrasonic sensing unit. Please refer to Figure 5 , Figure 2 The absolute pressure sensing unit included in each sensor component in the sensor array 03 is located between the ultrasonic sensing unit and the pressure component 02.

[0092] For example, please refer to Figure 6 , Figure 6 is a top view of another sensor array a provided by an embodiment of the present application, which includes 15 sensor components. Please refer to Figure 7 , Figure 7 is a side view of another sensor array a provided by an embodiment of the present application, from which it can be seen that each sensor component in the sensor array a includes an absolute pressure sensing unit and four ultrasonic sensing units. Figure 7

[0093] In some embodiments, the above-mentioned ultrasonic sensing unit includes a signal electrode, a piezoelectric material and a ground electrode, and the absolute pressure sensing unit includes a signal electrode, a separation material and a ground electrode.

[0094] Among them, please refer to Figure 8 , Figure 8 is a schematic diagram of an ultrasonic sensing unit provided by an embodiment of the present application, in which the piezoelectric material of the ultrasonic sensing unit is located between the signal electrode of the ultrasonic sensing unit and the ground electrode of the ultrasonic sensing unit. Please refer to Figure 9 , Figure 9 is a schematic diagram of an absolute pressure sensing unit provided by an embodiment of the present application, in which the separation material is located between the signal electrode of the absolute pressure sensing unit and the ground electrode of the absolute pressure sensing unit.

[0095] Optionally, for the absolute pressure sensing unit and the at least one ultrasonic sensing unit in the same sensor component, please refer to Figure 10 ,​Figure 10 is a schematic diagram of a sensor assembly provided by an embodiment of the present application, a ground electrode of an absolute pressure sensing unit of the sensor assembly is the same electrode as ground electrodes of some or all of ultrasonic sensing units of at least one ultrasonic sensing unit, that is Figure 10 the common ground electrode shown in

[0096] In some embodiments, the common ground electrode can be a single electrode layer, that is, the ground electrode of the absolute pressure sensing unit and the ground electrodes of some or all of the ultrasonic sensing units of the at least one ultrasonic sensing unit are integrated into one electrode layer. In other embodiments, the common ground electrode can also be a two-sided electrode in communication with the upper and lower sides, that is, the ground electrode of the absolute pressure sensing unit and the ground electrodes of some or all of the ultrasonic sensing units of the at least one ultrasonic sensing unit are attached to form a two-sided electrode in communication with the upper and lower sides.

[0097] Since the ultrasonic sensing unit and the absolute pressure sensing unit share the same ground electrode, wiring for the ground electrodes of the ultrasonic sensing unit and the absolute pressure sensing unit is not required, thereby effectively reducing the complexity of processing the sensor assembly and reducing the hardware cost.

[0098] It should be noted that the plurality of common ground electrodes corresponding to the plurality of sensor assemblies can be independent of each other or can be electrically connected to each other, and the embodiments of the present application do not limit this.

[0099] Optionally, for the absolute pressure sensing unit and the at least one ultrasonic sensing unit in the same sensor assembly, a plane in which the ground electrodes of some or all of the ultrasonic sensing units of the at least one ultrasonic sensing unit are located is not parallel to a plane in which the ground electrode of the absolute pressure sensing unit is located.

[0100] For example, please refer to Figure 11 , Figure 11 is a schematic diagram of another sensor assembly provided by an embodiment of the present application, the sensor assembly includes an absolute pressure sensing unit and an ultrasonic sensing unit, and a plane in which a ground electrode of the ultrasonic sensing unit is located can have an angle θ1 with a plane in which a ground electrode of the absolute pressure sensing unit is located.

[0101] Since the angle between the ultrasonic direction and the blood flow direction is closer to 0 degrees, the blood flow velocity is more accurate, therefore, by making the plane in which the ground electrode of some or all of the ultrasonic sensing units of the at least one ultrasonic sensing unit is located not parallel to the plane in which the ground electrode of the absolute pressure sensing unit is located, the embodiments of the present application reduce the angle between the ultrasonic direction and the blood flow direction, so that the blood flow velocity can be calculated more simply and accurately, thereby reducing the required computing power and energy consumption of the processor for determining the blood flow velocity.

[0102] Optionally, for any one of the plurality of sensor assemblies, the sensor assembly further comprises a first inclined structure between a ground electrode of an absolute pressure sensing unit comprised by the sensor assembly and part or all of ground electrodes of at least one ultrasonic sensing unit comprised by the sensor assembly; the ground electrode of the absolute pressure sensing unit is located on a side of the first inclined structure close to the pressure assembly, and the ground electrode of the at least one ultrasonic sensing unit is located on a side of the first inclined structure away from the pressure assembly.

[0103] In some embodiments, referring to Figure 12 , Figure 12 is a schematic diagram of a first inclined structure provided by an embodiment of the present application, the first inclined structure is a trapezoidal structure, in this case, there is no intersection between the ground electrode of the absolute pressure sensing unit and the ground electrode of part or all of the at least one ultrasonic sensing unit.

[0104] In some other embodiments, referring to Figure 13 , Figure 13 is a schematic diagram of another first inclined structure provided by an embodiment of the present application, the first inclined structure is a triangular structure, in this case, there is an intersection between the ground electrode of the absolute pressure sensing unit and the ground electrode of part or all of the at least one ultrasonic sensing unit.

[0105] Since when the first inclined structure is a triangular structure, there is an intersection between the ground electrode of the absolute pressure sensing unit and the ground electrode of part or all of the at least one ultrasonic sensing unit, that is, the ground electrode of the absolute pressure sensing unit is in contact with the ground electrode of part or all of the at least one ultrasonic sensing unit, in this way, the part or all of the at least one ultrasonic sensing unit can be in communication with the ground electrode of the absolute pressure sensing unit while ensuring that the ultrasonic sensing unit has an inclined angle, so that additional wiring is not required for the part or all of the ultrasonic sensing unit and the ground electrode of the absolute pressure sensing unit respectively, effectively reducing the complexity of processing of the sensor assembly and reducing the hardware cost.

[0106] For example, referring to Figure 14 , Figure 14 is a schematic diagram of a sensor assembly a provided by an embodiment of the present application, the sensor assembly a comprises one absolute pressure sensing unit and two ultrasonic sensing units, the two ultrasonic sensing units are ultrasonic sensing unit a and ultrasonic sensing unit b respectively, the ground electrode of the ultrasonic sensing unit a is the same electrode as the ground electrode of the absolute pressure sensing unit, and there is a first inclined structure between the ground electrode of the ultrasonic sensing unit b and the ground electrode of the absolute pressure sensing unit.

[0107] In some embodiments, for any one of the plurality of sensor assemblies, the sum of the sizes of the at least one ultrasonic sensing unit of the sensor assembly in the horizontal direction is not greater than the size of the absolute pressure sensing unit of the sensor assembly in the horizontal direction, and the sum of the sizes of the at least one ultrasonic sensing unit in the vertical direction is not greater than the size of the absolute pressure sensing unit in the vertical direction.

[0108] Since the sum of the sizes of the at least one ultrasonic sensing unit in the horizontal direction and the sum of the sizes of the at least one ultrasonic sensing unit in the vertical direction are not greater than the size of the absolute pressure sensing unit of the sensor assembly in the horizontal direction, the accuracy of the absolute pressure sensing unit for pressure detection can be ensured.

[0109] Optionally, referring to Figure 15 and Figure 16 , Figure 15 is a schematic view of a first direction provided by an embodiment of the present application, Figure 16 is another schematic view of a first direction provided by an embodiment of the present application, the size of the absolute pressure sensing unit in the first direction is not greater than the diameter of the corresponding arterial blood vessel, and the first direction is perpendicular to the flow direction of the corresponding arterial blood vessel.

[0110] In actual applications, the diameter of a standard arterial blood vessel of a human body is about 2-3 mm, in which case the diameter of the arterial blood vessel can be any value in the range of 2-3 mm, for example, the diameter of the arterial blood vessel can be 3 mm. Moreover, in different cases, it can also be adjusted according to different needs, which is not limited by the embodiments of the present application.

[0111] Optionally, the size of the absolute pressure sensing unit in the horizontal direction is not greater than 2 mm, and the size of the absolute pressure sensing unit in the vertical direction is not greater than 2 mm.

[0112] Optionally, the piezoelectric material of the ultrasonic sensing unit is used to generate ultrasonic waves under the action of voltage and to sense ultrasonic waves (i.e., detect ultrasonic echoes). The piezoelectric material can be piezoelectric ceramic, piezoelectric film or piezoelectric crystal, which is not limited by the embodiments of the present application.

[0113] Optionally, the absolute pressure sensing unit is a piezoresistive pressure sensor or a piezoelectric pressure sensor. In the case of a piezoresistive pressure sensor, the separation material of the absolute pressure sensing unit is a dielectric material; in the case of a piezoresistive pressure sensor, the separation material of the absolute pressure sensing unit is a piezoresistive material.

[0114] Optionally, the dielectric material can be a polymeric material such as polydimethylsiloxane (PDMS), polybutylene adipate terephthalate (ecoflex), etc., which is not limited in the embodiments of the present application.

[0115] In some embodiments, referring to Figure 17 , Figure 17 is a schematic diagram of another sensor assembly provided by the embodiments of the present application, which further comprises a packaging layer and a substrate. The packaging layer is located on the side of the at least one ultrasonic sensing unit away from the pressure assembly, and is used to protect the electrical structure inside the sensor assembly and provide a moisture barrier. The substrate is located on the side of the absolute pressure sensing unit close to the pressure assembly, and the substrate is electrically connected to the absolute pressure sensing unit and the at least one ultrasonic sensing unit. The substrate is used to connect to the corresponding circuit of the processor.

[0116] Optionally, the plane in which the signal electrode of the absolute pressure sensing unit is located is not parallel to the side of the substrate away from the pressure assembly.

[0117] For example, referring to Figure 18 , Figure 18 is a schematic diagram of an absolute pressure sensing unit provided by the embodiments of the present application. The plane in which the signal electrode of the absolute pressure sensing unit is located is at an angle θ2 to the side of the substrate away from the pressure assembly.

[0118] As described above, by tilting the absolute pressure sensing unit, the embodiments of the present application can tilt the ultrasonic sensing unit, thereby reducing the angle between the ultrasonic direction and the blood flow direction. In this way, the blood flow velocity can be calculated more simply and accurately, thereby reducing the required computing power and energy consumption of the processor.

[0119] Optionally, for any one of the plurality of sensor assemblies, the sensor assembly further comprises a second tilting structure located between the signal electrode of the absolute pressure sensing unit included in the sensor assembly and the substrate. The signal electrode of the absolute pressure sensing unit is located on the side of the second tilting structure away from the pressure assembly, and the substrate is located on the side of the second tilting structure close to the pressure assembly.

[0120] In some embodiments, referring to Figure 19 , Figure 19 is a schematic diagram of a second tilting structure provided by the embodiments of the present application. The second tilting structure is trapezoidal, and in this case, there is no intersection between the ground signal electrode of the absolute pressure sensing unit and the substrate.

[0121] In some embodiments, the second inclined structure is a triangular structure, in which case the signal electrode of the absolute pressure sensing unit intersects the substrate.

[0122] In some embodiments, the second inclined structure is a triangular structure, in which case the signal electrode of the absolute pressure sensing unit intersects the substrate.

[0123] In some embodiments, the thickness of the encapsulation layer is an odd multiple of one quarter of the wavelength of the ultrasonic wave emitted by the ultrasonic sensing unit.

[0124] Since the ultrasonic wave is reflected and transmitted at the interface between two media when it propagates from one medium to another, when the thickness of the encapsulation layer is an odd multiple of one quarter of the wavelength of the ultrasonic wave, according to the interference principle of sound waves, the ultrasonic wave inside the encapsulation layer will undergo phase superposition or cancellation. When the thickness of the encapsulation layer is an odd multiple of one quarter of the wavelength, the ultrasonic wave at the interface between the two sides of the encapsulation layer will undergo destructive interference, thereby reducing the reflection of the ultrasonic wave at the interface between the two sides of the encapsulation layer, improving the propagation efficiency and detection accuracy of the ultrasonic wave signal.

[0125] Since the Young's modulus and thickness of the encapsulation layer directly affect the mechanical properties and response sensitivity of the absolute pressure sensing unit, for the Young's modulus of the encapsulation layer, a higher Young's modulus will make the encapsulation layer have higher stiffness and be able to withstand greater external force without significant deformation, which helps to improve the measurement accuracy and stability of the absolute pressure sensing unit. However, too high a Young's modulus will also make the absolute pressure sensing unit too rigid when subjected to impact or vibration, thereby affecting the spatial resolution of the absolute pressure sensing array. For the thickness of the encapsulation layer, a thinner encapsulation layer can reduce the overall size and weight of the sensor assembly and improve the response speed and sensitivity of the absolute pressure sensing unit. However, a too thin encapsulation layer cannot provide sufficient mechanical strength and durability and is prone to deformation or damage when subjected to external force. While a thicker encapsulation layer can provide better mechanical protection, it will also increase the volume and weight of the sensor assembly, reducing the response speed and sensitivity of the absolute pressure sensing unit.

[0126] Based on the above reasons, the mechanical transmission performance of the pressure sensing unit needs to be considered when designing the Young's modulus and thickness of the packaging layer. By optimizing these two parameters of the packaging layer, the mechanical performance and transmission efficiency of the absolute pressure sensing unit can be improved to meet the needs of different application scenarios. For example, if the absolute pressure sensing unit needs to have high sensitivity and response speed, a packaging layer with a larger Young's modulus and thinner thickness can be selected. If the absolute pressure sensing unit needs to withstand a larger external pressure and vibration, a packaging layer with a moderate Young's modulus and a larger thickness can be selected. The embodiments of the present application do not limit this.

[0127] In the embodiments of the present application, when the user wears the wearable device, the at least one sensor array is located on the side of the pressure assembly away from the wearing strap. In this case, the sensor assembly in the sensor array includes, in order from the user's skin to the pressure assembly, a packaging layer, an ultrasonic sensing unit, an absolute pressure sensing unit, and a substrate. At this time, the packaging layer will be in contact with the user's skin, therefore, the material of the packaging layer needs to match the acoustic impedance of the skin, that is, a material with similar acoustic impedance to the skin is selected, so as to reduce the reflection and scattering of sound waves between the packaging layer and the skin, and improve the efficiency of sound wave transmission.

[0128] Optionally, the material of the packaging layer is polydimethylsiloxane or polybutylene succinate-terephthalate.

[0129] Optionally, the substrate of the sensor assembly is a flexible substrate, and the circuit trace of the flexible substrate has a serpentine trace.

[0130] Since the flexible substrate can be bent, folded, twisted, compressed, stretched, and even deformed into any shape, in the case that the trace of the conductive circuit (i.e., the circuit) on the flexible substrate has a serpentine trace, the bending performance of the circuit can be improved, thereby ensuring that the circuit on the flexible substrate can better adapt to the deformation of the flexible substrate, thereby ensuring the stability of the sensor assembly.

[0131] For example, the material of the substrate can be polyimide or polyester film, and the embodiments of the present application do not limit this.

[0132] It should be noted that for any one of the plurality of sensor assemblies, the signal electrode and the ground electrode included in the absolute pressure sensing unit of the sensor assembly are respectively electrically connected to the substrate of the sensor assembly; and the signal electrode and the ground electrode included in each ultrasonic sensing unit of the sensor assembly are respectively electrically connected to the substrate of the sensor assembly.

[0133] Since the at least one ultrasonic sensing unit and the absolute pressure sensing unit in the sensor assembly can share the same common ground electrode, the ground electrode of the absolute pressure sensing unit and the ground electrode of the ultrasonic sensing unit can be electrically connected to the substrate of the sensor assembly by electrically connecting the common ground electrode to the substrate, thus greatly simplifying the circuit structure of the sensor assembly, reducing the number of circuit traces, and improving the integration of the wearable device.

[0134] Optionally, the electrical connection can be achieved by wire bonding or by a multi-layer structure of a circuit board, which is not limited in the embodiments of the application.

[0135] It should be noted that for any sensor array in the at least one sensor array, the substrates of the plurality of sensor assemblies in the sensor array can be the same substrate (i.e., a common substrate), or can be different substrates, or the substrates of any at least two assemblies of the plurality of sensor assemblies can be the same substrate, which is not limited in the embodiments of the application.

[0136] For example, referring to Figure 20 , Figure 20 is a schematic diagram of a flexible substrate provided by an embodiment of the application. The sensor array 03a includes eight sensor assemblies, and the substrates of the eight sensor assemblies are the same flexible substrate (i.e., a common substrate).

[0137] If the substrates of the plurality of sensor assemblies in the sensor array are common substrates, the common substrates are connected to the circuit in which the processor included in the wearable device is located.

[0138] Based on the above description, the plurality of common ground electrodes corresponding to the plurality of sensor assemblies can be independent of each other or can be electrically connected to each other. In the case where the plurality of common ground electrodes are independent of each other, the plurality of common ground electrodes are electrically connected to the common substrate, and in the case where the plurality of common ground electrodes are electrically connected to each other, any one of the plurality of common ground electrodes is electrically connected to the common substrate.

[0139] Since in the case where the plurality of common ground electrodes are electrically connected to each other, only one of the plurality of common ground electrodes needs to be electrically connected to the common substrate, thus greatly simplifying the circuit structure of the sensor array, further reducing the number of circuit traces, and greatly improving the integration of the wearable device.

[0140] If the substrates of each sensor assembly in the sensor array are not the same substrate, i.e., the sensor array includes a plurality of substrates, the plurality of substrates are connected to the circuit in which the processor included in the wearable device is located.

[0141] In some embodiments, the column direction of the sensor array is the same as the flow direction of the corresponding arterial blood vessel, and the plurality of sensor components are arranged in a manner of M rows and N columns, M is an integer greater than or equal to 1, and N is an integer greater than 1.

[0142] For example, refer to Figure 21 , Figure 21 is a schematic diagram of an arrangement of a sensor array provided by an embodiment of the present application. If the at least one sensor array 03 includes a sensor array 03a, the column direction of the sensor array 03a is the same as the flow direction of the corresponding arterial blood vessel, and the seven sensor components of the sensor array 03a are arranged in a manner of one row and seven columns.

[0143] In some embodiments, for any one sensor array 03, the sensor components of adjacent two rows of the plurality of sensor components included in the sensor array are staggered.

[0144] For example, refer to Figure 22 , Figure 22 is a schematic diagram of another arrangement of a sensor array provided by an embodiment of the present application. If the at least one sensor array 03 includes a sensor array 03a, the sensor components of adjacent two rows of the plurality of sensor components included in the sensor array 03a are staggered.

[0145] In some embodiments, refer to Figure 23 , Figure 23 is a schematic diagram of another sensor array provided by an embodiment of the present application. The at least one sensor array includes a first array and / or a second array, the first array corresponds to a radial arterial blood vessel, and the second array corresponds to an ulnar arterial blood vessel.

[0146] It should be noted that, in the case where the wearable device includes at least two sensor arrays, the arrangement of the at least two sensor arrays, the number of sensor components in the sensor array, the internal structure of the sensor component, and the size of the sensor component can be the same or different, and the embodiments of the present application do not limit this.

[0147] The wearable device provided by the embodiments of the present application can be used to determine the blood vessel state of the user, and then measure the blood pressure of the user based on the blood vessel state of the user, or determine the pulse condition, the stroke volume of the arterial blood vessel, the arterial stiffness index of the arterial blood vessel, and the like based on the blood vessel state of the user, and the embodiments of the present application do not limit this.

[0148] The wearable device provided by the embodiments of the present application can be worn on any part of the user's body where there is an arterial blood vessel, such as the wrist, the leg, the upper arm, and the like, and the arterial blood vessel can be a superficial arterial blood vessel, and the embodiments of the present application do not limit this.

[0149] In the case that the wearable device is used to measure blood pressure on the wrist of the user, the wearable device can be a watch, a bracelet, a wrist electronic sphygmomanometer, or any other electronic device capable of measuring blood pressure. In this case, the wearable strap can also be referred to as a wrist strap.

[0150] For example, refer to Figure 24 , Figure 24 is a structural schematic diagram of a watch provided by an embodiment of the present application. The watch includes a wearable strap (not shown in the figure), an inflation assembly, two sensor arrays, and a processor (not shown in the figure). The inflation assembly includes a gas pump and a gas bag. The two sensor arrays include a radial artery array and an ulnar artery array. Figure 24 Figure 24 The inflation assembly is located on the inner side of the wearable strap, and the inflation assembly 02 is distributed along the length direction of the wearable strap 01. The two sensor arrays are located on the side of the inflation assembly away from the wearable strap 01. When the user wears the wearable device, the radial artery array corresponds to the position of the radial artery blood vessel of the user, and the ulnar artery array corresponds to the position of the ulnar artery blood vessel of the user. The two sensor arrays are located in the center of the inflation assembly to ensure that the sensor arrays collect stable pressure data. The bases of the plurality of sensor components in the radial artery array are the same base (i.e., common base 1), and the bases of the plurality of sensor components in the ulnar artery array are also the same base (i.e., common base 2). The common base 1 and the common base 2 are connected through a lead 1, and the common base 1 is connected to the watch body interface through a lead 2.

[0151] The sensor components in the sensor array in the embodiment of the present application include an absolute pressure sensing unit and at least one ultrasonic sensing unit. The absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure component, that is, the ultrasonic sensing unit and the absolute pressure sensing unit are placed in a stacked manner. In this way, the wearable device can have both the absolute pressure sensing unit and the ultrasonic sensing unit, and the number of the two types of sensing units in the unit size is not lost, that is, the spatial resolution of the two types of sensing units is not lost. The embodiment of the present application determines the blood vessel state of the user by using the pressure data set and the ultrasonic data set collected by the at least one sensor array when the user wears the wearable device. In this way, the pressure data set and the ultrasonic data set can reflect the true blood vessel state, thereby further improving the accuracy of the determined blood vessel state.

[0152] The sensor components in the sensor array in the embodiment of the present application include an absolute pressure sensing unit and at least one ultrasonic sensing unit. The absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure component, that is, the ultrasonic sensing unit and the absolute pressure sensing unit are placed in a stacked manner. In this way, the wearable device can have both the absolute pressure sensing unit and the ultrasonic sensing unit, and the number of the two types of sensing units in the unit size is not lost, that is, the spatial resolution of the two types of sensing units is not lost. The embodiment of the present application determines the blood vessel state of the user by using the pressure data set and the ultrasonic data set collected by the at least one sensor array when the user wears the wearable device. In this way, the pressure data set and the ultrasonic data set can reflect the true blood vessel state, thereby further improving the accuracy of the determined blood vessel state.

[0153] ​In addition, since the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure assembly, that is, the at least one ultrasonic sensing unit is closer to the skin of the user relative to the absolute pressure sensing unit when the user wears the wearable device, thus, it can be ensured that the ultrasonic waves emitted by the ultrasonic sensing unit and the detected echoes will not be disturbed by the absolute pressure sensing unit, thereby effectively ensuring the accuracy of the ultrasonic data collected by the ultrasonic sensing unit. Since the ultrasonic sensing unit and the absolute pressure sensing unit share the same ground electrode, thus, there is no need to connect the ground electrodes of the ultrasonic sensing unit and the absolute pressure sensing unit respectively, thereby effectively reducing the complexity of the processing of the sensor assembly, and reducing the hardware cost. Since the closer the angle between the ultrasonic direction and the blood flow direction is to 0 degrees, the more accurate the blood flow velocity is obtained, therefore, the ground electrodes of part or all of the at least one ultrasonic sensing unit are not parallel to the plane where the ground electrode of the absolute pressure sensing unit is located, or the absolute pressure sensing unit is placed obliquely, thereby making the ultrasonic sensing unit oblique, so as to reduce the angle between the ultrasonic direction and the blood flow direction, thus, the blood flow velocity can be calculated more simply and accurately, thereby reducing the required computing power and the energy consumption of the processor to determine the blood flow velocity, to reduce the angle between the ultrasonic direction and the blood flow direction, thus, the blood flow velocity can be calculated more simply and accurately, thereby reducing the required computing power and the energy consumption of the processor to determine the blood flow velocity.

[0154] Since the ground electrode of the absolute pressure sensing unit and the ground electrodes of the partial or all of the at least one ultrasonic sensing unit intersect when the first inclined structure is a triangular structure, that is, the ground electrode of the absolute pressure sensing unit contacts the ground electrodes of the partial or all of the at least one ultrasonic sensing unit, thus, the partial or all of the at least one ultrasonic sensing unit can be in communication with the ground electrode of the absolute pressure sensing unit while ensuring that the ultrasonic sensing unit has an inclined angle, so that the ground electrodes of the partial or all of the ultrasonic sensing unit and the absolute pressure sensing unit do not need to be wired separately, effectively reducing the complexity of the sensor assembly processing and reducing the hardware cost. Since the sum of the sizes of the at least one ultrasonic sensing unit in the horizontal direction and the sum of the sizes in the vertical direction are not greater than the size of the absolute pressure sensing unit of the sensor assembly in the horizontal direction, thus, the accuracy of the absolute pressure sensing unit for pressure detection can be ensured. Since the signal electrode of the absolute pressure sensing unit and the substrate intersect when the second inclined structure is a triangular structure, that is, the signal electrode of the absolute pressure sensing unit contacts the substrate, thus, the signal electrode of the absolute pressure sensing unit can be in communication with the substrate while ensuring that the ultrasonic sensing unit has an inclined angle, so that the signal electrode of the absolute pressure sensing unit does not need to be wired separately, effectively reducing the complexity of the sensor assembly processing and reducing the hardware cost. Since ultrasonic waves will reflect and transmit at the interface of two media when propagating from one medium to another, according to the interference principle of sound waves, when the thickness of the packaging layer is an odd multiple of one quarter of the wavelength of the ultrasonic wave, the ultrasonic wave will undergo phase addition or cancellation inside the packaging layer, when the thickness of the packaging layer is an odd multiple of one quarter of the wavelength, the ultrasonic wave will undergo destructive interference at the interface of the two substances on both sides of the packaging layer, thereby reducing the reflection of the ultrasonic wave on both sides of the packaging layer, improving the propagation efficiency and detection accuracy of the ultrasonic wave signal. Since the flexible substrate can be bent, folded, twisted, compressed, stretched, or even deformed into any shape, when the conductive circuit on the flexible substrate has a serpentine layout, the bending performance of the circuit can be improved, so that the circuit on the flexible substrate can better adapt to the deformation of the flexible substrate, thereby ensuring the stability of the sensor assembly. Since the at least one ultrasonic sensing unit and the absolute pressure sensing unit in the sensor assembly can share the same common ground electrode, the ground electrode of the absolute pressure sensing unit and the substrate can be electrically connected, and the ground electrode of the ultrasonic sensing unit and the substrate can be electrically connected by only electrically connecting the common ground electrode with the substrate of the sensor assembly, thus, the circuit structure of the sensor assembly is greatly simplified, the number of circuit traces is reduced, and the integration of the wearable device is improved.Since in the case of mutual electrical connection between the plurality of common ground electrodes, only one of the plurality of common ground electrodes needs to be electrically connected with the common substrate, thus greatly simplifying the circuit structure of the sensor array, further reducing the number of circuit traces, and greatly improving the integration of the wearable device.

[0155] Those skilled in the art should understand that the wearable device described above is only an example, and other existing or future wearable devices, such as wearable devices that can be applicable to the embodiments of the present application, should also be included in the protection scope of the embodiments of the present application, and are hereby incorporated by reference.

[0156] It should be noted that the application scenarios and wearable devices described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0157] Please refer to Figure 25 , Figure 25 is another structural schematic diagram of a wearable device provided by the embodiments of the present application. The wearable device includes at least one processor 2501, a communication bus 2502, a memory 2503, and at least one communication interface 2504.

[0158] The processor 2501 can be a general central processing unit (CPU), a network processor (NP), a microprocessor, or can be one or more integrated circuits for implementing the solutions of the present application, such as an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0159] The communication bus 2502 is used to transmit information between the above-mentioned components. The communication bus 2502 can be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, only one thick line is shown in the figure, but it does not mean that there is only one bus or only one type of bus.

[0160] The memory 2503 can be a read-only memory (ROM), a random access memory (RAM), an electrically erasable programmable read-only memory (EEPROM), an optical disk (including a compact disc read-only memory (CD-ROM), a compact disc, a laser disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 2503 can exist independently and be connected to the processor 2501 through the communication bus 2502. The memory 2503 can also be integrated with the processor 2501.

[0161] The communication interface 2504 uses any transceiver-like mechanism for communicating with other devices or communication networks. The communication interface 2504 includes a wired communication interface and can also include a wireless communication interface. The wired communication interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless communication interface can be, for example, a wireless local area networks (WLAN) interface, a cellular network communication interface, or a combination thereof.

[0162] In a specific implementation, as an example, the processor 2501 can include one or more CPUs, such as the CPU0 and the CPU1 shown in FIG. 10. Figure 25

[0163] In a specific implementation, as an example, the wearable device can include multiple processors, such as the processor 2501 and the processor 2505 shown in FIG. 10. Each of these processors can be a single-core processor or a multi-core processor. The processor herein can refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions). Figure 25

[0164] ​​In a particular implementation, as an example, the wearable device can further include an output device 2506 and an input device 2507. The output device 2506 is in communication with the processor 2501 and can display information in a variety of ways. For example, the output device 2506 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, a projector, or the like. The input device 2507 is in communication with the processor 2501 and can receive input from a user in a variety of ways. For example, the input device 2507 can be a touch screen device, a sensor device, or the like.

[0165] In some embodiments, the memory 2503 is configured to store program code 2510 for implementing the solutions of the present application, and the processor 2501 can execute the program code 2510 stored in the memory 2503. The program code 2510 can include one or more software modules, and the wearable device can implement the following steps by means of the processor 2501 and the program code 2510 in the memory 2503. Figure 26 The embodiments provide a blood pressure measurement method.

[0166] Figure 26 is a flowchart of a blood pressure measurement method provided by the embodiments of the present application, and the method is applied to the wearable device described above. Please refer to Figure 26 The method includes the following steps.

[0167] In step 2601, an ultrasonic data set collected by each of the at least one sensor array is acquired, wherein the ultrasonic data set is collected by the corresponding sensor array when the corresponding sensor array is close to the skin of the user and the deformation amount of the corresponding arterial vessel is less than a deformation amount threshold.

[0168] In some embodiments, it is determined whether the at least one sensor array is in a target state, wherein the target state refers to that the corresponding sensor array is close to the skin of the user and the deformation amount of the corresponding arterial vessel is less than a deformation amount threshold. When the at least one sensor array is in the target state, the ultrasonic data set collected by each of the at least one sensor array is acquired.

[0169] Optionally, a third pressure data set collected by each of the at least one sensor array at a current time is acquired to obtain at least one third pressure data set, and a third pressure is determined based on the at least one third pressure data set. If the difference between the third pressure and the fitting pressure is less than a first threshold, it is determined that the at least one sensor array is in the target state.

[0170] The fitting pressure is a pressure that can make the corresponding sensor array close to the skin of the user and make the deformation of the corresponding arterial blood vessel less than a deformation threshold. In other words, the fitting pressure is to ensure that the at least one sensor array is fitted to the skin of the user and makes the deformation of the arterial blood vessel less.

[0171] It should be noted that the step of determining whether the at least one sensor array is in the target state is performed during the pressurization of the pressure assembly. During the increase of the pressure applied by the pressure assembly, the at least one sensor array can collect pressure data at a certain frequency to obtain a corresponding third pressure data set at different times. After obtaining a third pressure data set at a time, it is determined whether the at least one sensor array is in the target state at the time based on the third pressure data set at the time. That is, the third pressure is determined once the third pressure data set collected by the at least one sensor array at a time is obtained. If the difference between the third pressure and the fitting pressure is less than the first threshold, it is determined that the at least one sensor array is in the target state at the time, and the pressure assembly is stopped from pressurizing. If the difference between the third pressure and the fitting pressure is not less than the first threshold, the third pressure data set at the next time is obtained.

[0172] Optionally, the rate of change of the pressure applied by the pressure assembly and the first threshold are set in advance. For example, the rate of change of the pressure can be any value in the range of 0.2 kilopascal per second (kPa / s) to 0.8 kPa / s, which is not limited in the embodiments of the present application.

[0173] In some embodiments, each third pressure data set includes a plurality of pressure data, which one-to-one corresponds to a plurality of absolute pressure sensing units included in the corresponding sensor array. The average of the plurality of pressure data included in the at least one third pressure data set is determined as the third pressure.

[0174] In some embodiments, the fitting pressure can be set to any value in the range of 10 millimeters of mercury to 50 millimeters of mercury, which is not limited in the embodiments of the present application.

[0175] In other embodiments, the fitting pressure is determined according to the body parameters of the user, wherein the body parameters of the user include at least one of the following: a target site, a size of the target site, a body fat rate, a height, and a weight. The target site is a site of the user wearing the wearable device.

[0176] For example, in a case where the user wears the wearable device on a wrist, the size of the target site refers to a wrist circumference of the wrist; in a case where the user wears the wearable device on a leg, the size of the target site refers to a leg circumference of the leg; in a case where the user wears the wearable device on an upper arm, the size of the target site refers to an arm circumference of the upper arm.

[0177] In a possible implementation, the wearable device can acquire the body parameter of the user, and then determine the fit pressure based on the body parameter of the user, the body parameter including at least one of the target site, the size of the target site, the body fat rate, the height, and the weight.

[0178] In some embodiments, the user can input at least one of the target site, the size of the target site, the body fat rate, the height, and the weight in the wearable device, and then the wearable device can acquire the body parameter of the user.

[0179] In a case where the body parameter of the user includes the target site and the size of the target site, the wearable device stores a correspondence relationship between the site, the size, and the fit pressure, and in this case, the wearable device can determine the fit pressure corresponding to the size of the target site from the correspondence relationship between the site, the size, and the fit pressure based on the target site and the size of the target site.

[0180] It should be noted that, for any one ultrasonic sensing unit, the duration for which the ultrasonic sensing unit collects ultrasonic data is at least greater than one pulse wave cycle, for example, the duration for which the ultrasonic sensing unit collects ultrasonic data can be any value greater than or equal to 10 seconds.

[0181] Step 2602: Determine the blood vessel state information respectively corresponding to the at least one arterial blood vessel based on the ultrasonic data sets respectively collected by the at least one sensor array.

[0182] In some embodiments, the ultrasonic data set includes ultrasonic data respectively collected by a plurality of ultrasonic sensing units included in the corresponding sensor array. In this case, based on the ultrasonic data sets respectively collected by the at least one sensor array, the effective ultrasonic sensing units respectively corresponding to the at least one sensor array are determined from the ultrasonic sensing units included in the at least one sensor array, the ultrasonic data collected by the effective ultrasonic sensing units being able to effectively represent the arterial blood vessel state of the user, and based on the ultrasonic data collected by the effective ultrasonic sensing units respectively corresponding to the at least one sensor array, the blood vessel state information respectively corresponding to the at least one arterial blood vessel is determined.

[0183] In some embodiments, based on the ultrasonic data collected by each ultrasonic sensing unit in the first sensor array, a candidate blood vessel diameter corresponding to each ultrasonic sensing unit in the first sensor array is determined, the first sensor array being any one of the at least one sensor array, an ultrasonic sensing unit with the largest candidate blood vessel diameter in the first sensor array is determined as an effective ultrasonic sensing unit corresponding to the first sensor array, and based on the ultrasonic data collected by the effective ultrasonic sensing unit corresponding to the first sensor array, blood vessel state information corresponding to each of the first arterial blood vessels is determined, the first arterial blood vessels being the arterial blood vessels corresponding to the first sensor array.

[0184] For example, for any ultrasonic sensing unit in the first sensor array, a candidate blood vessel diameter corresponding to the ultrasonic sensing unit can be determined based on the ultrasonic data collected by the ultrasonic sensing unit according to a related time of flight (TOF) ultrasonic echo delay algorithm, and the ultrasonic data collected by each ultrasonic sensing unit in the first sensor array is processed in the same way to obtain a candidate blood vessel diameter corresponding to each ultrasonic sensing unit. Of course, in actual applications, the candidate blood vessel diameter can also be determined by other algorithms, which are not limited by the embodiments of the present application.

[0185] Optionally, the blood vessel state information includes at least one of the depth of the arterial blood vessel, the diameter of the arterial blood vessel, the blood vessel wall thickness of the arterial blood vessel, and the blood flow velocity of the arterial blood vessel.

[0186] In the case where the blood vessel state information includes at least one of the depth of the arterial blood vessel, the diameter of the arterial blood vessel, and the blood vessel wall thickness of the arterial blood vessel, the blood vessel state information corresponding to each of the first arterial blood vessels can be determined based on the ultrasonic data collected by the effective ultrasonic sensing unit in the first sensor array according to a related TOF ultrasonic echo delay algorithm.

[0187] In the case where the blood vessel state information includes the blood flow velocity of the arterial blood vessel, a plurality of target effective ultrasonic sensing units for forming a phased array to determine the blood flow velocity of the first arterial blood vessel can be determined from the first sensor array based on the positions of the effective ultrasonic sensing units in the first sensor array according to a related phased array algorithm, the plurality of target effective ultrasonic sensing units emit and collect ultrasonic data, and the blood flow velocity of the first arterial blood vessel can be determined based on the ultrasonic data collected by the plurality of target effective ultrasonic sensing units according to a related ultrasonic Doppler algorithm.

[0188] Step 2603: obtaining a first pressure data set collected by at least one sensor array, the first pressure data set being collected by a plurality of absolute pressure sensing units included in the corresponding sensor array during the pressurization or depressurization of the pressure assembly;

[0189] After determining the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the pressure component in the wearable device can pressurize and depressurize at a target rate, or pressurize and then depressurize at a target rate, or pressurize at a target rate and then depressurize at a target rate. That is, there is at least one process in which the pressure component in the wearable device changes the pressure at a target rate during the pressurization and depressurization processes, and the at least one sensor array can collect a pressure data set during the process in which the pressure component changes the pressure at a target rate.

[0190] The target rate is set in advance, and the upper limit of the value range of the target rate is related to the sampling frequency of the sensor array and the heart rate of the user. The higher the sampling frequency of the sensor array and / or the higher the heart rate of the user, the higher the upper limit of the value range of the target rate. In other words, the sampling frequency of the sensor array and the heart rate of the user are directly proportional to the upper limit of the value range of the target rate.

[0191] Step 2604: determining the first blood pressure of the user based on the first pressure data set collected by the at least one sensor array and the blood vessel state information corresponding to the at least one arterial blood vessel respectively.

[0192] In some embodiments, based on the first pressure data set collected by the at least one sensor array and the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the arterial pressure data corresponding to the at least one arterial blood vessel is determined, and based on the arterial pressure data corresponding to the at least one arterial blood vessel respectively, the first blood pressure of the user is determined.

[0193] Optionally, the first pressure data set includes first pressure data collected by an effective pressure sensing unit, and the first pressure data includes first pressure data at multiple time points, and the effective pressure sensing unit is an absolute pressure sensing unit included in a sensor assembly in which the target ultrasonic sensing unit in the first sensor array is located. In this case, based on the first pressure data collected by the effective pressure sensing unit in the first sensor array and the blood vessel state information corresponding to the first arterial blood vessel, the arterial pressure data corresponding to the first blood vessel is determined.

[0194] The implementation process of determining the arterial pressure data corresponding to the first blood vessel based on the first pressure data collected by the effective pressure sensing unit in the first sensor array and the blood vessel state information corresponding to the first arterial blood vessel includes multiple kinds, and two implementation manners are introduced as follows.

[0195] The first implementation manner is to determine the arterial pressure data corresponding to the first blood vessel based on the first pressure data collected by the effective pressure sensing unit in the first sensor array and the blood vessel state information corresponding to the first arterial blood vessel according to the following formula (1).

[0196] P artery (t) = f [d artery , P skin (t)] (1)

[0197] Wherein, Partery(t) refers to the first blood vessel at the t time of the arterial pressure data, d artery refers to the first arterial blood vessel corresponding to the blood vessel state information, P skin (t) effective pressure sensing unit at the t time of the first pressure data.

[0198] The second implementation, the first sensor array in the effective pressure sensing unit of the first pressure data, and the first arterial blood vessel corresponding to the blood vessel state information is input into the arterial pressure data model, to obtain the arterial pressure data model output of the first blood vessel corresponding to the arterial pressure data.

[0199] It should be noted that, before determining the first blood vessel corresponding to the arterial pressure data through the arterial pressure data model, the arterial pressure data model can also be trained. That is, the state information corresponding to a plurality of arterial blood vessels and the first pressure data collected by the effective pressure sensing unit in a plurality of sensor arrays, and the arterial pressure data corresponding to the plurality of arterial blood vessels respectively, the plurality of sensor arrays and the plurality of arterial blood vessels one by one, the state information corresponding to the arterial blood vessel and the first pressure data collected by the effective pressure sensing unit in the corresponding sensor array are used as the input of the arterial pressure data model, and the arterial pressure data corresponding to the arterial blood vessel is used as the output of the arterial pressure data model. The arterial pressure data model is trained.

[0200] Of course, in actual application, the arterial pressure data corresponding to the first blood vessel can also be determined by other ways. For example, the ultrasonic data collected by the effective ultrasonic sensing unit corresponding to the first sensing array, and the first pressure data collected by the effective pressure sensing unit in the first sensor array are input into the arterial pressure data model, to obtain the arterial pressure data model output of the first blood vessel corresponding to the arterial pressure data. For example, the ultrasonic data collected by the effective ultrasonic sensing unit corresponding to the first sensing array, the blood vessel state information corresponding to the first arterial blood vessel, and the first pressure data collected by the effective pressure sensing unit in the first sensor array are input into the arterial pressure data model, to obtain the arterial pressure data model output of the first blood vessel corresponding to the arterial pressure data.

[0201] In the case of different number of arterial blood vessels, the implementation of determining the first blood pressure of the user based on the arterial pressure data corresponding to the at least one arterial blood vessel is different, which will be introduced respectively.

[0202] In a case where the number of the at least one arterial blood vessel is one, the wearable device can determine the first blood pressure of the user according to a relevant algorithm based on the arterial pressure data corresponding to the arterial blood vessel.

[0203] In a case where the number of the at least one arterial blood vessel is at least two, that is, the at least one arterial blood vessel includes at least two arterial blood vessels, in this case, the average of the at least two candidate blood pressures corresponding to the at least two arterial blood vessels respectively can be determined as the first blood pressure of the user based on the arterial pressure data corresponding to the at least two arterial blood vessels according to a relevant algorithm. Of course, in actual applications, the maximum value, the minimum value, or any one value of the at least two candidate blood pressures can be determined as the first blood pressure of the user, and the embodiments of the present application do not limit this.

[0204] In actual applications, after determining the first blood pressure of the user based on the first pressure data set collected by the at least one sensor array and the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the wearable device can also determine the static pressure corresponding to the first blood pressure of the user based on the first blood pressure of the user and the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the static pressure being the pressure applied by the pressure assembly when the blood pressure of the user reaches the first blood pressure, determining the first pressure based on the static pressure, adjusting the pressure applied by the pressure assembly to be the first pressure, obtaining the second pressure data set collected by the at least one sensor array at at least one time respectively, the second pressure data set being collected by the plurality of absolute pressure sensing units included in the corresponding sensor array under the condition that the pressure applied by the pressure assembly remains the first pressure, and determining the second blood pressure corresponding to the user at at least one time based on the second pressure data set collected by the at least one sensor array at at least one time respectively and the blood vessel state information corresponding to the at least one arterial blood vessel respectively.

[0205] In a case where the first blood pressure and the blood vessel state information are determined, the continuous measurement of blood pressure can be realized by the method provided by the embodiments of the present application, that is, without the need for the pressure assembly to pressurize or depressurize at a certain rate to determine the blood pressure, but the second blood pressure can be obtained based on the second pressure data set collected by the sensor array and the blood vessel state information, so that the blood pressure measurement steps can be reduced, the measurement efficiency can be improved, and the accuracy of blood pressure measurement can be ensured.

[0206] In some embodiments, the static pressure can be directly determined as the first pressure, and in other embodiments, the product of the static pressure and a pressure attenuation coefficient can be determined as the first pressure, and the embodiments of the present application do not limit this.

[0207] The pressure attenuation coefficient is any value between 0 and 1, for example, the pressure attenuation coefficient can be 0.8. Of course, in actual application, the pressure attenuation coefficient can also be greater than 1, for example, the pressure attenuation coefficient can be 1.2, and the embodiments of the present application do not limit this.

[0208] For any one of the at least one time, based on the second pressure data set respectively collected by the at least one sensor array at the time and the blood vessel state information respectively corresponding to the at least one arterial blood vessel, the second blood pressure corresponding to the user at the time is determined.

[0209] In some embodiments, based on the second pressure data set collected by the first sensor array at the time and the blood vessel state information corresponding to the first arterial blood vessel, the arterial pressure data of the first arterial blood vessel at the time is determined by the above formula (1). Each sensor array is processed in the same way to obtain the arterial pressure data respectively corresponding to the at least one arterial blood vessel at the time.

[0210] The average of the arterial pressure data respectively corresponding to the at least one arterial blood vessel at the time is determined as the second blood pressure of the user at the time. Of course, in actual application, the maximum, minimum or any value of the arterial pressure data respectively corresponding to the at least one arterial blood vessel at the time can also be determined as the second blood pressure of the user, and the embodiments of the present application do not limit this.

[0211] In some embodiments, the wearable device can also determine the blood pressure difference value respectively corresponding to the at least one time based on the second blood pressure corresponding to the at least one time, the blood pressure difference value being the difference between the first blood pressure and the second blood pressure at the corresponding time. If there is at least one blood pressure difference value greater than the difference threshold value in the blood pressure difference value respectively corresponding to the at least one time, the ultrasound data set collected by the at least one sensor array is reacquired. Otherwise, the second pressure data set collected by the at least one sensor array at the at least one time is reacquired.

[0212] If there is at least one blood pressure difference value greater than the difference threshold value in the blood pressure difference value respectively corresponding to the at least one time, it means that the second blood pressure at the at least one time has a large difference with the first blood pressure, and the measurement result of the second blood pressure is not accurate. Therefore, the ultrasound data set collected by the at least one sensor array can be reacquired to redetermine the blood vessel state information. If there is no at least one blood pressure difference value greater than the difference threshold value in the blood pressure difference value respectively corresponding to the at least one time, it means that the second blood pressure at the at least one time has a small difference with the first blood pressure, and the measurement result of the second blood pressure is accurate. Therefore, the second pressure data set collected by the at least one sensor array at the at least one time can be reacquired to determine the second blood pressure of the user at the subsequent time.

[0213] In actual application, in addition to the case that at least one blood pressure difference value in the blood pressure difference values respectively corresponding to the at least one time instant is greater than the difference value threshold, the ultrasound data sets respectively collected by the at least one sensor array can be reacquired. Based on the blood pressure difference values respectively corresponding to the at least one time instant, a target blood pressure difference value can be determined. If the target blood pressure difference value is greater than the difference value threshold, the ultrasound data sets respectively collected by the at least one sensor array are reacquired. If the target blood pressure difference value is not greater than the difference value threshold, the second pressure data sets respectively collected by the at least one sensor array at the at least one time instant are reacquired.

[0214] Optionally, the average, the maximum or the minimum of the blood pressure difference values respectively corresponding to the at least one time instant can be taken as the target blood pressure difference value, which is not limited in the embodiments of the present application.

[0215] For example, the first blood pressure of the user is 100 mmHg, and the second blood pressures corresponding to the at least one time instant include the second blood pressures corresponding to time instants 1-3, wherein the second blood pressure corresponding to time instant 1 is 120 mmHg, the second blood pressure corresponding to time instant 2 is 80 mmHg, and the second blood pressure corresponding to time instant 3 is 110 mmHg. In this case, the difference between the first blood pressure and the second blood pressure corresponding to time instant 1 is 20 mmHg, the difference between the first blood pressure and the second blood pressure corresponding to time instant 2 is 20 mmHg, and the difference between the first blood pressure and the second blood pressure corresponding to time instant 3 is 10 mmHg. Since the maximum of the blood pressure difference values corresponding to the three time instants is 20 mmHg, the target blood pressure difference value is 20 mmHg.

[0216] In some embodiments, the wearable device further stores a time stamp of the last time when the blood vessel state information respectively corresponding to the at least one arterial blood vessel is determined. In this case, if the time difference between the current time and the time stamp is greater than a time difference threshold, the ultrasound data sets respectively collected by the at least one sensor array can be reacquired to re-determine the blood vessel state information.

[0217] That is, when the time of the last time when the blood vessel state is determined is far away from the current time, the blood vessel state information respectively corresponding to the at least one arterial blood vessel can change, and thus the ultrasound data sets respectively collected by the at least one sensor array can be reacquired to determine the blood vessel state information, so as to ensure the accuracy of the subsequent determination of the blood pressure of the user.

[0218] The difference value threshold and the time difference threshold are set in advance, and can be adjusted according to requirements in different cases. For example, the difference value threshold can be any value between 15 mmHg and 30 mmHg, and the time difference threshold can be any value between 1 minute and 5 minutes, which is not limited in the embodiments of the present application.

[0219] In some embodiments, the wearable device further comprises an acceleration sensor, and the wearable device reacquires the ultrasound data sets respectively collected by the at least one sensor array to re-determine the blood vessel state information according to a relevant algorithm based on data collected by the acceleration sensor when the wearable device determines that the posture of the user has changed.

[0220] In the case of determining that the posture of the user has changed, the relative position between the arterial blood vessels of the user and the sensor array can change, and therefore, the blood vessel state information can be re-determined to ensure the accuracy of subsequent determination of the blood pressure of the user.

[0221] In actual application, the wearable device stops measuring the second blood pressure of the user in response to the operation of stopping blood pressure measurement.

[0222] Optionally, the user can trigger the operation of stopping blood pressure measurement, and the wearable device stops measuring the second blood pressure of the user in response to the operation of stopping blood pressure measurement.

[0223] For example, the wearable device further comprises a touchable screen, and the touchable screen can display a stop control for stopping blood pressure measurement, in which case, the user can trigger the operation of stopping blood pressure measurement by clicking the stop control displayed on the touchable screen.

[0224] For example, the wearable device further comprises a physical button for stopping blood pressure measurement, in which case, the user can trigger the operation of stopping blood pressure measurement by pressing the physical button.

[0225] Next, the blood pressure measurement method provided by the embodiments of the present application will be introduced again. Figure 27 The blood pressure measurement method provided by the embodiments of the present application will be introduced again.

[0226] Please refer to Figure 27 , Figure 27is a flowchart of another blood pressure measurement method provided by an embodiment of the present application. The wearable device includes a first sensor array. When the first sensor array is close to the skin of a user and the deformation amount of the corresponding arterial blood vessel is less than a deformation amount threshold, the wearable device acquires an ultrasound data set collected by the first sensor array, determines a candidate blood vessel diameter corresponding to each ultrasound sensing unit in the first sensor array based on the ultrasound data collected by each ultrasound sensing unit in the first sensor array, determines an effective ultrasound sensing unit corresponding to the first sensor array as the ultrasound sensing unit with the largest candidate blood vessel diameter in the first sensor array, determines blood vessel state information of a first arterial blood vessel based on the ultrasound data collected by the effective ultrasound sensing unit corresponding to the first sensor array, the first arterial blood vessel being the arterial blood vessel corresponding to the first sensor array. The wearable device controls a pressure assembly to pressurize at a target rate. During the pressurization process, the wearable device acquires first pressure data collected by the effective pressure sensing unit in the first sensor array, determines arterial pressure data corresponding to the first blood vessel based on the first pressure data collected by the effective pressure sensing unit in the first sensor array and the blood vessel state information corresponding to the first arterial blood vessel, and determines a first blood pressure of the user based on the arterial pressure data corresponding to the first blood vessel. Based on the first blood pressure of the user and the blood vessel state information corresponding to the first arterial blood vessel, the wearable device determines a static pressure corresponding to the first blood pressure of the user, determines a first pressure based on the static pressure corresponding to the first blood pressure, adjusts the pressure applied by the pressure assembly to the first pressure, acquires a second pressure data set collected by the first sensor array at multiple time points, determines second blood pressures corresponding to the user at the multiple time points based on the second pressure data set collected by the first sensor array at the multiple time points and the blood vessel state information corresponding to the first arterial blood vessel at the multiple time points, determines blood pressure difference values corresponding to the multiple time points based on the second blood pressures corresponding to the multiple time points, and reacquires the ultrasound data set collected by the first sensor array if at least one of the blood pressure difference values corresponding to the multiple time points is greater than a difference value threshold and / or the time difference between the current time and the time stamp of the latest determination of the blood vessel state information is greater than a time difference threshold. Otherwise, the wearable device reacquires the second pressure data set collected by the first sensor array at the multiple time points.

[0227] Since the blood pressure of the user is determined based on the blood vessel state of the user and the first pressure data set respectively collected by the sensor array during the pressurization or depressurization of the pressure assembly, the accuracy of the blood pressure measurement can be further improved. In the case where the first blood pressure and the blood vessel state information are determined, the continuous measurement of the blood pressure can be realized by the method provided in the embodiments of the present application, that is, the blood pressure can be determined based on the second pressure data set collected by the sensor array and the blood vessel state information to obtain the second blood pressure, so that the blood pressure measurement steps can be reduced, the measurement efficiency can be improved, and the accuracy of the blood pressure measurement can be ensured.

[0228] Figure 28 is a structural schematic diagram of a blood pressure measurement device provided by the embodiments of the present application. The blood pressure measurement device can be realized by software, hardware or a combination of both to become part or all of the wearable device described above. Referring to Figure 28 , the device comprises a first acquisition module 2801, a first determination module 2802, a second acquisition module 2803 and a second determination module 2804.

[0229] The first acquisition module 2801 is configured to acquire an ultrasonic data set respectively collected by at least one sensor array. The ultrasonic data set is collected by the corresponding sensor array close to the skin of the user and when the deformation amount of the corresponding arterial blood vessel is less than a deformation amount threshold. For detailed implementation process, reference can be made to the corresponding content in the above various embodiments, which will not be described here again.

[0230] The first determination module 2802 is configured to determine the blood vessel state information respectively corresponding to at least one arterial blood vessel based on the ultrasonic data set respectively collected by at least one sensor array. For detailed implementation process, reference can be made to the corresponding content in the above various embodiments, which will not be described here again.

[0231] The second acquisition module 2803 is configured to acquire a first pressure data set respectively collected by at least one sensor array. The first pressure data set is collected by a plurality of absolute pressure sensing units included in the corresponding sensor array during the pressurization or depressurization of the pressure assembly. For detailed implementation process, reference can be made to the corresponding content in the above various embodiments, which will not be described here again.

[0232] The second determination module 2804 is configured to determine the first blood pressure of the user based on the first pressure data set collected by at least one sensor array and the blood vessel state information respectively corresponding to at least one arterial blood vessel. For detailed implementation process, reference can be made to the corresponding content in the above various embodiments, which will not be described here again.

[0233] Optionally, the first determination module 2802 is specifically configured to:

[0234] determine, from the ultrasonic sensor units included in the at least one sensor array, effective ultrasonic sensor units corresponding to the at least one sensor array respectively, the effective ultrasonic sensor units being capable of effectively representing the arterial blood vessel state of the user based on the ultrasonic data sets collected by the at least one sensor array respectively;

[0235] determine the blood vessel state information corresponding to the at least one arterial blood vessel based on the ultrasonic data collected by the effective ultrasonic sensor units corresponding to the at least one sensor array respectively.

[0236] Optionally, the apparatus further comprises:

[0237] a third determining module configured to determine a static pressure corresponding to the first blood pressure of the user based on the first blood pressure of the user and the blood vessel state information corresponding to the at least one arterial blood vessel respectively, the static pressure being a pressure applied by the pressure assembly when the blood pressure of the user reaches the first blood pressure;

[0238] an adjusting module configured to determine the first pressure based on the static pressure, and adjust the pressure applied by the pressure assembly to be the first pressure;

[0239] a third obtaining module configured to obtain second pressure data sets collected by the at least one sensor array at at least one time respectively, the second pressure data sets being collected by the plurality of absolute pressure sensing units included in the corresponding sensor array when the pressure applied by the pressure assembly remains the first pressure;

[0240] a fourth determining module configured to determine second blood pressures corresponding to the user at the at least one time based on the second pressure data sets collected by the at least one sensor array at the at least one time respectively and the blood vessel state information corresponding to the at least one arterial blood vessel respectively.

[0241] Optionally, the apparatus further comprises:

[0242] a fifth determining module configured to determine blood pressure difference values corresponding to the at least one time respectively based on the second blood pressures corresponding to the at least one time, the blood pressure difference values being differences between the first blood pressure and the second blood pressures corresponding to the corresponding time respectively;

[0243] the fourth obtaining module is configured to re-obtain the ultrasonic data sets collected by the at least one sensor array respectively if at least one blood pressure difference value in the blood pressure difference values corresponding to the at least one time respectively is greater than a difference threshold value.

[0244] Optionally, the blood vessel state information comprises at least one of the following: a depth of the arterial blood vessel, a diameter of the arterial blood vessel, a blood vessel wall thickness of the arterial blood vessel, and a blood flow velocity of the arterial blood vessel.

[0245] In the embodiments of the present application, since the blood pressure of the user is determined based on the blood vessel state of the user and the first pressure data set collected by the sensor array during the pressurization or depressurization of the pressure assembly, the accuracy of the blood pressure measurement can be further improved. In the case where the first blood pressure and the blood vessel state information are determined, the continuous measurement of the blood pressure can be realized by the method provided in the embodiments of the present application, that is, the blood pressure does not need to be determined by the pressurization or depressurization of the pressure assembly at a certain rate, but the second blood pressure can be obtained based on the second pressure data set collected by the sensor array and the blood vessel state information, so that the blood pressure measurement steps can be reduced, the measurement efficiency can be improved, and the accuracy of the blood pressure measurement can be ensured.

[0246] It should be noted that the blood pressure measurement device provided in the above embodiments only divides the above functions for example, and in actual application, the above functions can be completed by different function modules according to needs, that is, the internal structure of the device is divided into different function modules to complete all or part of the above described functions. In addition, the blood pressure measurement device and the blood pressure measurement method provided in the above embodiments belong to the same concept, and the specific implementation process is described in the method embodiments, which will not be repeated here.

[0247] The embodiments of the present application also provide a computer readable storage medium, wherein instructions are stored in the storage medium, and when the instructions are run on a computer or a processor, the computer or the processor executes the steps of the blood pressure measurement method provided in the above embodiments.

[0248] The embodiments of the present application also provide a computer program product containing instructions, when the instructions are run on a computer or a processor, the computer or the processor executes the steps of the blood pressure measurement method provided in the above embodiments. Alternatively, a computer program is provided, when the computer program is run on a computer or a processor, the computer or the processor executes the steps of the blood pressure measurement method provided in the above embodiments.

[0249] In the above embodiments, all or part can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (for example: coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example: infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example: floppy disk, hard disk, magnetic tape), optical media (for example: digital versatile disc (DVD)) or semiconductor media (for example: solid state disk (SSD)) and the like. It should be noted that the computer-readable storage medium mentioned in the embodiments of the present application can be a non-volatile storage medium, in other words, it can be a non-transitory storage medium.

[0250] It should be understood that "multiple" mentioned herein refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, "first", "second" and the like are used to distinguish the same items or similar items with basically the same function and role in the embodiments of the present application. Those skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order, and "first", "second" and the like do not necessarily mean different.

[0251] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of the present application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions. For example, the ultrasound data set and the first pressure data set involved in the embodiments of the present application are obtained under sufficient authorization.

[0252] The above describes the embodiments provided by the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wearable device, characterized in that, The wearable device includes a wearable strap, a pressure component, at least one sensor array, and a processor; The pressure component is located inside the wearable strap, and the pressure component is distributed along the length direction of the wearable strap; The at least one sensor array is located on the side of the pressure component away from the wearable strip, and when the user wears the wearable device, the at least one sensor array corresponds to the position of at least one artery of the user; The sensor array includes multiple sensor components, each sensor component including an absolute pressure sensing unit and at least one ultrasonic sensing unit, wherein the absolute pressure sensing unit is located between the at least one ultrasonic sensing unit and the pressure component. The absolute pressure sensing unit is used to collect the pressure borne by the corresponding artery, the ultrasound sensing unit is used to collect ultrasound data, and the processor is used to determine the user's vascular status based on the pressure dataset and ultrasound dataset collected by the at least one sensor array.

2. The wearable device as described in claim 1, characterized in that, The ultrasonic sensing unit includes a signal electrode, a piezoelectric material, and a ground electrode; the absolute pressure sensing unit includes a signal electrode, a separating material, and a ground electrode. The piezoelectric material is located between the signal electrode and the ground electrode of the ultrasonic sensing unit, and the separating material is located between the signal electrode and the ground electrode of the absolute pressure sensing unit.

3. The wearable device as described in claim 2, characterized in that, The ground electrode of the absolute pressure sensing unit is the same as the ground electrode of the at least one ultrasonic sensing unit.

4. The wearable device as described in claim 2, characterized in that, The plane where the ground electrode of some or all of the ultrasonic sensing units in the at least one ultrasonic sensing unit is located is not parallel to the plane where the ground electrode of the absolute pressure sensing unit is located.

5. The wearable device according to any one of claims 1-4, characterized in that, The sum of the dimensions of the at least one ultrasonic sensing unit in the horizontal direction is not greater than the dimension of the absolute pressure sensing unit in the horizontal direction, and the sum of the dimensions of the at least one ultrasonic sensing unit in the vertical direction is not greater than the dimension of the absolute pressure sensing unit in the vertical direction.

6. The wearable device according to any one of claims 1-5, characterized in that, The absolute pressure sensing unit has a horizontal dimension of no more than 2 mm and a vertical dimension of no more than 2 mm.

7. The wearable device according to any one of claims 2-6, characterized in that, The piezoelectric material is a piezoelectric ceramic, a piezoelectric thin film, or a piezoelectric crystal.

8. The wearable device according to any one of claims 2-7, characterized in that, When the absolute pressure sensing unit is a capacitive pressure sensor, the separating material is a dielectric material; when the absolute pressure sensing unit is a piezoresistive pressure sensor, the separating material is a piezoresistive material.

9. The wearable device according to any one of claims 1-8, characterized in that, The sensor assembly also includes an encapsulation layer and a substrate; The encapsulation layer is located on the side of the at least one ultrasonic sensing unit away from the pressure component, and the encapsulation layer is used to protect the internal electrical structure of the sensor component and provide a moisture barrier; The substrate is located on the side of the absolute pressure sensing unit close to the pressure component, and the substrate is electrically connected to the absolute pressure sensing unit and the at least one ultrasonic sensing unit. The substrate is used for circuit connection with the processor.

10. The wearable device as claimed in claim 9, characterized in that, The plane containing the signal electrode of the absolute pressure sensing unit is not parallel to the side of the substrate away from the pressure component.

11. The wearable device as described in claim 9 or 10, characterized in that, The thickness of the encapsulation layer is an odd multiple of one-quarter of the wavelength of the ultrasonic wave emitted by the ultrasonic sensing unit.

12. The wearable device according to any one of claims 9-11, characterized in that, The encapsulation layer is made of polydimethylsiloxane or polysuccinic acid-terephthalic acid-terephthalate.

13. The wearable device according to any one of claims 9-12, characterized in that, The substrate is a flexible substrate, and the circuit traces on the flexible substrate have a serpentine pattern.

14. The wearable device as claimed in claim 13, characterized in that, The substrate is made of polyimide or polyester film.

15. The wearable device according to any one of claims 1-14, characterized in that, The column direction of the sensor array is the same as the flow direction of the corresponding artery. The multiple sensor components are arranged in an M-row N-column configuration, where M is an integer greater than or equal to 1 and N is an integer greater than 1.

16. The wearable device as claimed in claim 15, characterized in that, The sensor components in adjacent rows of the plurality of sensor components are arranged in an alternating pattern.

17. The wearable device according to any one of claims 1-16, characterized in that, The at least one sensor array includes a first array and / or a second array, wherein the first array corresponds to the radial artery and the second array corresponds to the ulnar artery.

18. A method for measuring blood pressure using a wearable device according to any one of claims 1-17, characterized in that, The method includes: Acquire ultrasound datasets collected by the at least one sensor array, wherein the ultrasound datasets are collected when the corresponding sensor array is close to the user's skin and the deformation of the corresponding artery is less than the deformation threshold; Based on the ultrasound datasets collected by the at least one sensor array, the vascular status information corresponding to the at least one artery is determined. A first pressure dataset is acquired by the at least one sensor array, wherein the first pressure dataset is acquired by the multiple absolute pressure sensing units included in the corresponding sensor array during the pressurization or depressurization of the pressure component; The user's first blood pressure is determined based on the first pressure dataset collected by the at least one sensor array and the vascular status information corresponding to the at least one artery.

19. The method as described in claim 18, characterized in that, The determination of vascular state information corresponding to the at least one artery based on the ultrasound datasets collected by the at least one sensor array includes: Based on the ultrasound datasets collected by the at least one sensor array, the effective ultrasound sensing units corresponding to the at least one sensor array are determined from the ultrasound sensing units included in the at least one sensor array. The ultrasound data collected by the effective ultrasound sensing units can effectively characterize the user's arterial vascular status. Based on the ultrasound data collected by the effective ultrasound sensing units corresponding to the at least one sensor array, the vascular status information corresponding to the at least one artery is determined.

20. The method as described in claim 18, characterized in that, After determining the user's first blood pressure based on the first pressure dataset collected by the at least one sensor array and the vascular state information corresponding to the at least one artery, the method further includes: Based on the user's first blood pressure and the vascular status information corresponding to the at least one artery, the static pressure corresponding to the user's first blood pressure is determined. The static pressure is the pressure applied by the pressure component when the user's blood pressure reaches the first blood pressure. Based on the static pressure, a first pressure is determined, and the pressure applied by the pressure assembly is adjusted to the first pressure. Acquire a second pressure dataset collected by the at least one sensor array at at least one moment, wherein the second pressure dataset is collected by the multiple absolute pressure sensing units included in the corresponding sensor array when the pressure applied by the pressure component is maintained at the first pressure; Based on the second pressure dataset collected by the at least one sensor array at the at least one time and the vascular state information corresponding to the at least one artery, the second blood pressure of the user at the at least one time is determined.

21. The method as described in claim 20, characterized in that, The method further includes: Based on the second blood pressure corresponding to the at least one time moment, a blood pressure difference value corresponding to at least one time moment is determined, wherein the blood pressure difference value is the difference between the first blood pressure and the second blood pressure corresponding to the corresponding time moment; If at least one of the blood pressure differences corresponding to the at least one time point is greater than the difference threshold, then the ultrasound datasets collected by the at least one sensor array are reacquired.

22. The method according to any one of claims 18-21, characterized in that, The vascular status information includes at least one of the following: arterial depth, arterial diameter, arterial wall thickness, and arterial blood flow velocity.

23. A blood pressure measuring device, characterized in that, The wearable device according to any one of claims 1-17, the device comprising: The first acquisition module is used to acquire ultrasound datasets collected by the at least one sensor array respectively. The ultrasound datasets are collected when the corresponding sensor array is close to the user's skin and the deformation of the corresponding artery is less than the deformation threshold. The first determining module is used to determine the vascular status information corresponding to the at least one artery based on the ultrasound dataset collected by the at least one sensor array; The second acquisition module is used to acquire a first pressure dataset collected by the at least one sensor array respectively. The first pressure dataset is collected by the multiple absolute pressure sensing units included in the corresponding sensor array during the pressurization or depressurization of the pressure component. The second determining module is used to determine the user's first blood pressure based on the first pressure dataset collected by the at least one sensor array and the vascular state information corresponding to the at least one artery.

24. The apparatus as claimed in claim 23, characterized in that, The first determining module is specifically used for: Based on the ultrasound datasets collected by the at least one sensor array, the effective ultrasound sensing units corresponding to the at least one sensor array are determined from the ultrasound sensing units included in the at least one sensor array. The ultrasound data collected by the effective ultrasound sensing units can effectively characterize the user's arterial vascular status. Based on the ultrasound data collected by the effective ultrasound sensing units corresponding to the at least one sensor array, the vascular status information corresponding to the at least one artery is determined.

25. The apparatus as claimed in claim 23, characterized in that, The device further includes: The third determining module is used to determine the static pressure corresponding to the user's first blood pressure based on the user's first blood pressure and the vascular state information corresponding to the at least one artery, wherein the static pressure is the pressure applied by the pressure component when the user's blood pressure reaches the first blood pressure. An adjustment module is used to determine a first pressure based on the static pressure and adjust the pressure applied by the pressure component to the first pressure; The third acquisition module is used to acquire a second pressure dataset collected by the at least one sensor array at at least one moment. The second pressure dataset is collected by the multiple absolute pressure sensing units included in the corresponding sensor array when the pressure applied by the pressure component is maintained at the first pressure. The fourth determining module is used to determine the user's second blood pressure at the at least one time based on the second pressure dataset collected by the at least one sensor array at the at least one time and the vascular state information corresponding to the at least one artery.

26. The apparatus as claimed in claim 25, characterized in that, The device further includes: The fifth determining module is used to determine the blood pressure difference value corresponding to at least one time based on the second blood pressure corresponding to the at least one time, wherein the blood pressure difference value is the difference between the first blood pressure and the second blood pressure corresponding to the corresponding time. The fourth acquisition module is used to reacquire the ultrasound datasets collected by the at least one sensor array if at least one of the blood pressure differences corresponding to the at least one time moment is greater than the difference threshold.

27. The apparatus according to any one of claims 23-26, characterized in that, The vascular status information includes at least one of the following: arterial depth, arterial diameter, arterial wall thickness, and arterial blood flow velocity.

28. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed on a computer or processor, causes the computer or processor to perform the method as described in any one of claims 18 to 22.

29. A computer program product, characterized in that, The computer program product includes computer instructions that, when executed by a computer or processor, cause the steps of the method as described in any one of claims 18 to 22 to be performed.

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