Pulse detection system and method and wearable device

Abstract

The embodiment of the invention discloses a pulse detection system and method and wearable equipment, and the system comprises a pulse detection module which is used for detecting the information of the current pressure borne by a detected target body by a pressure applying module under the condition of a current pressurization signal, and outputting a pulse signal of the detected target body according to the information of the current pressure borne by the detected target body; the control module is used for determining whether the measured target body needs to be pressurized or not according to the current pressure information; if the measured target body needs to be pressurized, a pressurizing signal is sent to the pressure applying module; and the pressure applying module is used for pressurizing the pulse detection module according to the pressurizing signal until an adaptive pressurizing signal of the detected target body is obtained, and then maintaining to send the adaptive pressurizing signal to the pulse detection module, so that the pulse detection module can output a pulse signal adaptive to the detected target body according to the adaptive pressurizing signal. In this way, better pulse pressure detection of different detected target bodies is achieved in a self-adaptive pressure adjustment mode.

Description

Technical Field

[0001] The present invention relates to the field of monitoring in wearable devices, and in particular to a pulse detection system, method and wearable device. Background Art

[0002] In recent years, wearable devices have become more and more popular. Current wearable devices are also integrated with pulse monitoring devices, which can assist wearers of wearable devices in simple pulse analysis. At present, the pulse pressure sensors in most wearable devices are usually directly attached to the skin of the detection site. However, the simple attachment method easily causes the sensor to undergo overall translational displacement with the skin as the pulse beats, making it difficult to directly transmit the pressure change to the sensor itself. On the other hand, if the auxiliary device is fixed, there will be excessive binding pressure that exceeds the elastic deformation range of the sensor, and different detection sites and different detection objects have different perceptions of pressure. Therefore, the existing technology uses auxiliary devices to press or not press, which may lead to inaccurate pulse detection results. Therefore, how to improve the accuracy of pulse detection of general wearable devices has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] To solve the existing technical problems, the embodiments of the present invention provide a pulse detection system, method and wearable device.

[0004] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0005] An embodiment of the present invention provides a pulse detection system, which is applied to a wearable device. The pulse detection system includes: a pulse detection module, a pressure application module, and a control module. The pulse detection module, the pressure application module, and the control module are interconnected.

[0006] The pulse detection module is connected between the pressure applying module and the control module, and is used to detect the current pressure information of the target body when the pressure applying module applies pressure to the target body under the current pressure signal, and output the pulse signal of the target body according to the current pressure information of the target body;

[0007] A control module connected between the pulse detection module and the pressure application module, the control module is used to determine whether the measured object needs to be pressurized according to the current pressure information; if the measured object needs to be pressurized, the control module sends a pressurization signal to the pressure application module;

[0008] The pressure applying module is connected between the pulse detection module and the control module. The pressure applying module is used to pressurize the pulse detection module according to the pressurization signal until the adapted pressurization signal of the target body is obtained, and then maintain sending the adapted pressurization signal to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal.

[0009] Optionally, the pressurization signal includes: a negative pressure signal and a positive pressure signal;

[0010] The pulse detection module comprises: a conformal adsorption unit, a pressure loading unit and a pressure sensing unit;

[0011] The conformal adsorption unit is connected to the pressure applying module and is used to perform negative pressure adsorption on the measured target according to the negative pressure signal provided by the pressure applying module;

[0012] The pressure loading unit is connected to the pressure applying module and is used to pressurize the measured target according to the positive pressure signal provided by the pressure applying module;

[0013] The pressure sensing unit is connected to the pressure loading unit and is used to detect pulse and current pressure information based on the pressurization of the target object by the pressure loading unit through the conformal adsorption unit.

[0014] Optionally, the pressure loading unit includes a bellows pressurized airbag; the conformal adsorption unit includes a flexible cup body, which is made of flexible material, and the cup mouth of the flexible cup body can be adjusted in diameter according to the target body to be detected; the bellows pressurized airbag is configured as an inner side edge of the flexible cup body, and is used to pressurize the target body to be detected based on the positive pressure signal.

[0015] Optionally, the flexible cup body comprises: a flexible main body layer and a high modulus top layer covering the flexible main body layer; the pressure applying module comprises: a first vacuum pump and a second vacuum pump;

[0016] The bellows pressurized airbag is arranged around the inner side of the flexible main body layer;

[0017] A side air path is provided on the side periphery of the flexible main body layer for receiving a second vacuum pump to absorb the air in the flexible cup body based on a negative pressure signal so as to absorb the measured target body in contact with the cup mouth of the flexible cup body;

[0018] The high modulus top layer and the flexible main body layer are both provided with top air paths, and the top air paths are connected to the bellows pressurized airbag for receiving the first vacuum pump to inflate the corrugated light pressurized airbag based on the positive pressure signal to pressurize the target body.

[0019] An embodiment of the present invention further provides a pulse detection method, which is applied to a wearable device, and the method includes:

[0020] Using the pulse detection module to detect the current pressure information of the measured object when the pressure applying module applies pressure to the measured object under the current pressure signal, and outputting the pulse signal of the measured object according to the current pressure information of the measured object;

[0021] Using the control module to determine whether the measured object needs to be pressurized according to the current pressure information; if the measured object needs to be pressurized, sending a pressurization signal to the pressure applying module;

[0022] The pressure applying module pressurizes the pulse detection module according to the pressurization signal until an adapted pressurization signal of the target body is obtained, and then the adapted pressurization signal is continued to be sent to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal.

[0023] Optionally, the detecting of current pressure information of the target body by the pulse detection module when the pressure applying module applies pressure to the target body under the current pressure signal, and outputting a pulse signal of the target body according to the current pressure information of the target body, comprises:

[0024] Using the pulse detection module to detect the Nth pressure information on the measured object when the pressure applying module applies pressure to the measured object under the Nth pressure signal, and outputting the pulse signal of the measured object according to the Nth pressure information on the measured object;

[0025] The method comprises: applying pressure to the pulse detection module according to the pressure signal until the adapted pressure signal of the detected object is obtained, and then continuing to send the adapted pressure signal to the pulse detection module, so that the pulse detection module can output a pulse signal adapted to the detected object according to the adapted pressure signal, including:

[0026] The pressure applying module is used to pressurize the pulse detection module according to the Nth pressurization signal to obtain the N+1th pressurization signal. If the N+1th pressurization signal is an adapted pressurization signal for the target body, the pressure applying module is used to send the N+1th pressurization signal to the pulse detection module so that the pulse detection module can output pressure information different from that received by the target body according to the N+1th pressurization signal, where N is a positive integer greater than or equal to 1.

[0027] Optionally, the utilizing the control module to determine whether the measured target body needs to be pressurized according to the current pressure information includes:

[0028] The control module determines whether the current pressure information meets the standard pressure range of the measured target body according to the current pressure information;

[0029] If the current pressure information meets the standard pressure range of the measured object, it is determined that the measured object does not need to be pressurized.

[0030] Optionally, the method further comprises:

[0031] If the current pressure information does not meet the standard pressure range of the measured object, it is determined that the measured object needs to be pressurized.

[0032] Optionally, the method further comprises:

[0033] If the current pressure information does not meet the standard pressure range of the measured target body, the control module sends the pressurization information to the pressure application module to the pulse detection module; the pressurization signal includes: a positive pressure signal and a negative pressure signal;

[0034] The pulse detection module adsorbs the detected target body according to the negative pressure signal, and detects the pulse signal after pressurizing the detected target body according to the positive pressure signal.

[0035] An embodiment of the present invention also provides a wearable device, which is integrated with a pulse detection device, wherein the pulse detection device includes: a processor and a memory for storing calculations and programs that can be run on the processor, wherein the processor is used to implement any of the above-mentioned pulse detection methods when running the computer program.

[0036] The pulse detection system, method and wearable device provided in the above-mentioned embodiments are provided with a pulse detection module, which is connected between the pressure applying module and the control module, and is used to detect the current pressure information of the target body under the current pressure signal, and output the pulse signal of the target body according to the current pressure information; the control module is connected between the pulse detection module and the pressure applying module, and is used to determine whether the target body needs to be pressurized according to the current pressure information; if the target body needs to be pressurized, a pressurization signal is sent to the pressure applying module; the pressure applying module is connected between the pulse detection module and the control module, and is used to pressurize the pulse detection module according to the pressurization signal until the adapted pressurization signal of the target body is obtained, and then maintain the sending of the adapted pressurization signal to the pulse detection module, so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal. Therefore, compared with the prior art, in which pulse detection technology in wearable devices cannot be attached to the skin or are attached inappropriately, the embodiments of the present invention can apply a pressurization signal adapted to the target body according to the conditions of different target bodies, thereby accurately measuring the pulse signal of the target body, thereby satisfying more accurate pulse pressure detection of different arterial parts or different individuals through adaptive pressure adjustment, thereby improving the pulse detection accuracy of wearable devices integrated with this pulse detection system, and further improving the product performance of wearable devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a pulse detection system provided by an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the structure of a pulse detection module provided by an embodiment of the present invention;

[0039] Figure 3 An exploded diagram of the structure of the pulse detection module provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the specific structure of the pulse detection module provided in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of a pulse detection system according to an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a pressure sensing unit provided in an embodiment of the present invention

[0043] Figure 7 A technical block diagram of a pulse detection system provided by a specific embodiment of the present invention;

[0044] Figure 8A schematic diagram of a circuit framework of a pulse detection system provided by a specific embodiment of the present invention;

[0045] Fig. 9 A schematic diagram of a flow chart of a pulse detection method provided by an embodiment of the present invention;

[0046] Fig.10 A schematic diagram of a specific working process of the pulse detection method provided by an embodiment of the present invention;

[0047] Fig.11 A schematic diagram of a pulse detection result detected by the pulse detection method provided by an embodiment of the present invention;

[0048] Fig.12 A schematic diagram of pulse detection results of different detection parts of the same individual provided by a specific embodiment of the present invention;

[0049] Fig.13 A schematic diagram of pulse detection results of different individuals provided by a specific embodiment of the present invention;

[0050] Fig.14 This is a schematic diagram of the structure of a pulse detection device provided in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0053] It should be noted that the pulse wave is an important part of the physiological signal, which can reflect the beating of the heart, including information such as heart rate and rhythm, and can also reflect the resistance state of peripheral blood vessels. In the field of traditional Chinese medicine, pulse is an important method for evaluating the health status of the human body. It is circulated and used in the detection part through floating, middle and sinking techniques, but it relies on the competent experience and judgment of practitioners, and faces challenges in standardization and repeatability. Therefore, a more objective and quantitative method is needed to obtain pulse signals under different pressures for standard detection and analysis of pulse signals. Photoplethysmography (PPG) is the most widely used pulse measurement method in clinical practice. It has the advantages of easy use and real-time monitoring, but it is easily affected by changes in light intensity, skin color, sweat, etc. As an emerging technology, wearable pressure sensors directly capture the pressure signal when the pulse beats through pressure detection methods to achieve accurate and real-time pulse signal materials. It has strong anti-interference ability and can directly reflect mechanical information such as the pressure state of the blood vessel wall.

[0054] At present, most wearable pulse pressure sensors are usually directly attached to the skin of the detection site, or fixed with auxiliary tools (such as bracelets and straps). The simple attachment method can easily cause the sensor to undergo overall translational displacement with the skin along with the pulse pulsation, making it difficult to directly transmit the pressure changes to the sensor itself; and the combination method using auxiliary tools for fixation may also result in excessive binding pressure that exceeds the elastic deformation range of the sensor. Both of the above situations will significantly affect the pressure perception of the pressure sensor of the wearable device, making it difficult to give full play to its advantages in detecting tiny pressure changes. Therefore, the stress adaptation problem of pulse pressure detection of wearable devices cannot be ignored.

[0055] More importantly, the arterial position, depth and pulse strength of different pulse measurement sites are different. In addition, due to differences in gender, age, body fat, etc., the pulse of different individuals at the same detection site will also have obvious differences. Based on this, it is necessary to accurately detect the pulse pressure of different individuals and different arterial sites. Not only does it require conformal integration and stress adaptation between the pressure sensor device of the wearable device and the skin surface, but sometimes it is also necessary to apply a certain local pressure so that the pressure sensor device can effectively sense the pulsation state of the arterial blood vessels at different tissue depths.

[0056] Based on this, how to integrate a wearable device with a pulse detection system that can adapt to the arterial blood vessels of various measured parts has become a technical problem that needs to be solved urgently.

[0057] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] Figure 1 A schematic diagram of the structure of a pulse detection system provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the pulse detection system includes: a pulse detection module 10, a pressure application module 20 and a control module 30, and the pulse detection module 10, the pressure application module 20 and the control module 30 are connected to each other;

[0059] The pulse detection module 10 is connected between the pressure applying module 20 and the control module 30. The pulse detection module 10 is used to detect the current pressure information of the measured object when the pressure applying module 20 applies pressure to the measured object under the current pressure signal, and output the pulse signal of the measured object according to the current pressure information of the measured object;

[0060] The control module 30 is connected between the pulse detection module 10 and the pressure application module 20. The control module 30 is used to determine whether the measured target body needs to be pressurized according to the current pressure information; if the measured target body needs to be pressurized, a pressurization signal is sent to the pressure application module 20;

[0061] The pressure applying module 20 is connected between the pulse detection module 10 and the control module 30. The pressure applying module 20 is used to pressurize the pulse detection module 10 according to the pressurization signal until an adapted pressurization signal of the target body to be measured is obtained, and then maintain sending an adapted pressurization signal to the pulse detection module so that the pulse detection module 10 can output a pulse signal adapted to the target body to be measured according to the pressurization signal.

[0062] Here, the pulse detection module 10 refers to a processing module installed on a wearable device for detecting the pulse signal of a target body. The pulse detection module 10 has a communication module, which can also send various detected detection data to a computer device that is communicatively connected to the pulse detection module.

[0063] It should be noted that the target body to be detected refers to the detection target of the pulse signal to be detected, for example, it can be a finger or a wrist. It should be noted that the target body to be detected corresponds to different detection parts of different people.

[0064] Here, the pressure applying module may be a device installed on a wearable device for applying pressure to the target body to be measured, for example, it may be a vacuum pump or the like.

[0065] It should be noted that the control module here can be integrated on a wearable device or on other computer devices connected through a communication module, as long as it can process the input information of the pulse detection module and output information to the pressure application module.

[0066] Exemplarily, the control module can be integrated with a signal acquisition and transmission module, wherein the signal acquisition and transmission module can adopt an STM32 microprocessor architecture, mainly including a signal acquisition path of a piezoelectric sensor, using a Bluetooth module for wireless signal transmission, and integrating signal amplification, filtering and AD conversion functions to ensure efficient acquisition and wireless transmission of pulse pressure signals.

[0067] The pulse detection module here can not only detect the pulse signal of the target object, but also detect the current pressure information of the target object, and with the help of the control module, output pressurization information when the current pressure information is insufficient, and continue to apply pressure to the target object with the help of the pressure application module until the detected current pressure information is adapted to the target object, thereby obtaining a more accurate pulse signal of the target object under the adapted pressure.

[0068] Therefore, the embodiment of the present invention uses a pulse detection module, which is connected between the pressure applying module and the control module, to detect the current pressure information of the target body under the current pressure signal, and output the pulse signal of the target body according to the current pressure information; then the control module determines whether the target body needs to be pressurized according to the current pressure information; if the target body needs to be pressurized, a pressurization signal is sent to the pressure applying module; then the pressure applying module pressurizes the pulse detection module according to the pressurization signal until the adapted pressurization signal of the target body is obtained, and then the adapted pressurization signal is sent to the pulse detection module, so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal. Therefore, compared with the prior art, in which pulse detection technology in wearable devices cannot be attached to the skin or are attached inappropriately, the embodiments of the present invention can apply a pressurization signal adapted to the target body according to the conditions of different target bodies, thereby accurately measuring the pulse signal of the target body, thereby satisfying more accurate pulse pressure detection of different arterial parts or different individuals through adaptive pressure adjustment, thereby improving the pulse detection accuracy of wearable devices integrated with this pulse detection system, and further improving the product performance of wearable devices.

[0069] In some embodiments, the pressure signal includes: a negative pressure signal and a positive pressure signal; see Figure 2 , Figure 2 The structure diagram of the pulse detection module provided by the embodiment of the present invention is as follows. The pulse detection module 10 comprises: a conformal adsorption unit 101, a pressure loading unit 102 and a pressure sensing unit 103;

[0070] The conformal adsorption unit 101 is connected to the pressure applying module 30 and is used to perform negative pressure adsorption on the target object according to the negative pressure signal provided by the pressure applying module 30;

[0071] The pressure loading unit 102 is connected to the pressure applying module 30 and is used to pressurize the measured target according to the positive pressure signal provided by the pressure applying module;

[0072] The pressure sensing unit 102 is connected to the pressure loading unit 102 and is used to detect pulse and current pressure information based on the pressure loading unit 102 applying pressure to the target body through the conformal adsorption unit 101 .

[0073] The negative pressure adsorption here can be 40-50kPa.

[0074] It should be noted that the conformal adsorption unit 101 includes a flexible cup body. It can be understood that the flexible cup body can be a cup-shaped flexible bionic suction cup structure, and the flexible bionic suction cup structure can be a dial of a wearable device (such as a wearable watch), etc. It can be seen that the flexible bionic suction cup structure can adapt to various curved surfaces and skin qualities of human skin and provide stable and firm adsorption capabilities. Based on this, the pulse detection module here can be called a flexible bionic pressurized suction cup structure. For convenience, the flexible bionic pressurized suction cup structure is the pulse detection module described in the above embodiment.

[0075] In some embodiments, see Figure 3 and Figure 5 The pressure loading unit 102 includes a bellows pressurized airbag 1021; the conformal adsorption unit 101 includes a flexible cup body, which is made of a flexible material. Since it is a flexible material, the mouth of the flexible cup body can be adjusted according to the measured object; thus, it can be adapted to different parts and different sizes of measured objects;

[0076] The bellows pressurized airbag 1021 is configured as a circle inside the flexible cup body, and is used to pressurize the target body to be measured based on the positive pressure signal.

[0077] In some embodiments, the conformable flexible cup body comprises: a flexible main body layer 1011 and a high modulus top layer 1012 covering the flexible main body layer 1011; the pressure applying module 20 comprises: a first vacuum pump and a second vacuum pump;

[0078] The bellows pressurized airbag 1021 is internally disposed around the flexible main body layer 1011;

[0079] A side air path is provided on the side periphery of the flexible main body layer 1011 for receiving a second vacuum pump to absorb the air in the flexible cup body based on a negative pressure signal so as to absorb the target object to be measured in contact with the cup mouth of the flexible cup body;

[0080] The high modulus top layer 1012 and the flexible main body layer 1011 are both provided with a top air path 1014, which is connected to the bellows pressurized airbag 1021 and is used to receive a positive pressure signal from a first vacuum pump to inflate the bellows pressurized airbag 1021 to pressurize the target body.

[0081] Please refer to Figure 3 The conformable adsorption unit 101 further includes an edge adhesive layer 1013 disposed at the bottom edge in contact with the skin.

[0082] Exemplarily, the bionic pressurized suction cup structure is composed of three different materials. The top layer uses high modulus materials such as polydimethylsiloxane (PDMS) to limit the deformation of the airbag in the top direction to enhance stress transfer. The middle suction cup main body layer and the bellows pressurized airbag are made of flexible materials with moderate modulus such as Dragon Skin (30, Smooth-On), which can better deform to meet the conformal adsorption of the suction cup and the extension deformation of the bellows pressurized airbag in the vertical direction; the bottom edge layer uses a flexible adhesive material with lower modulus and skin adhesion such as SkinTite (Smooth-On), which can form a preliminary seal on various skin surfaces and enhance airtightness under negative pressure. Ventilation air paths are left on the top and sides of the bionic pressurized suction cup for building a pneumatic control module.

[0083] For example, please refer to Figure 4 , Figure 4 A schematic diagram of the specific structure of the pulse detection module provided in an embodiment of the present invention is shown in FIG. Figure 4 As shown, the high modulus top layer 1012 has a diameter of 34 mm and a thickness of 1 mm, the middle flexible main body layer 1011 has an inner diameter of 26 mm and a thickness of 4 mm. The bellows pressure-enhanced outer diameter is 13.55 mm and a height of 7 mm, and the bottom edge adhesive layer has a diameter of 37-40 mm and a thickness of 0.3 mm.

[0084] For example, the bionic pressure suction cup structure is the specific structure of the pulse detection module, and the ventilation air paths on the top and sides are connected to the vacuum pump through a silicone hose and an electromagnetic method to achieve pneumatic control. Figure 3 and Figure 5 ,like Figure 5 As shown, it is used to control the inflation and / or deflation of the bellows pressurized airbag 1021, and the vacuum and / or intake of air in the sealed cavity in the suction cup.

[0085] In some embodiments, the pressure sensing unit 103 is located in the center of the bionic pressurized suction cup, that is, a high-sensitivity pressure sensor is integrated at the top of the bellows pressurized airbag to sense tiny changes in pulse pressure to output a pulse signal of the target body.

[0086] For example, Figure 6 A schematic diagram of the structure of a pressure sensing unit provided in an embodiment of the present invention is shown in FIG. Figure 6 As shown in FIG, the pressure sensing unit uses polyvinylidene fluoride (PVDF) piezoelectric material to construct a piezoelectric pulse pressure sensor, which can directly convert pulse pressure changes into electrical signals. Figure 6 As shown in the figure, the pressure sensor in the pressure sensing unit consists of a 5-layer structure. From top to bottom, the first layer is a polytetrafluoroethylene (PTFE) film packaging layer with a diameter of 10 mm and a thickness of 0.008 mm, the second and fourth layers are silver electrode layers with a diameter of 10 mm and a thickness of 0.008 mm, the third layer is a PVDF piezoelectric film layer with a diameter of 10 mm and a thickness of 0.028 mm, and the fifth layer is a polyimide Kapton film substrate layer with a diameter of 10 mm and a thickness of 0.175 mm.

[0087] In some embodiments, see Figure 7 , Figure 7 A technical block diagram of a pulse detection system provided by a specific embodiment of the present invention, such as Figure 7 As shown, the pulse detection system involved in the embodiment of the present invention mainly includes three hardware parts: a bionic adaptive pressure loading module and a pulse pressure sensing unit (i.e., the pulse detection module described in the above embodiment), and a signal acquisition and transmission module (i.e., a control module). It should be noted that the pressure application module described in the above embodiment can be a vacuum pump integrated in a wearable device, or a vacuum pump temporarily connected to the bionic pressure loading module when measurement is required, etc., as long as the bellows airbag in the bionic adaptive pressure loading module can achieve pressure conduction, and no limitation is made here.

[0088] The wearable device body is a pressurized suction cup structure with an integrated pressure sensor, and optionally, it can be a cup-shaped flexible bionic pressurized suction cup structure.

[0089] The signal acquisition and transmission module, i.e., the control module described in the above embodiment, transmits the pulse signal to a third-party communication device, such as Figure 7 The computer equipment in the display.

[0090] It can be understood that the control module of the embodiment of the present application also includes a communication unit, such as a Bluetooth communication unit or a WiFi communication unit.

[0091] For example, see Figure 8 , Figure 8 A schematic diagram of a circuit framework of a pulse detection system provided by an embodiment of the present invention is shown in FIG. Figure 8As shown in the figure, the circuit framework of the pulse detection system integrates a piezoelectric pressure sensor, an air pressure sensor, a vacuum pump, a solenoid valve, a signal acquisition and Bluetooth transmission module, and a microprocessor control unit. The system is powered by a rechargeable lithium battery or a Type-C direct connection. In this way, according to different test requirements and the physiological condition of the subject, the system can automatically adjust the pressure to ensure good contact between the sensor and the skin, while avoiding excessive pressure, thereby achieving standardized optimal pulse pressure detection.

[0092] In the above embodiment, a pulse detection system is designed, which is equipped with a flexible bionic suction cup structure for good conformal adsorption and fixation on the surface of human skin. The bionic suction cup structure is mainly composed of a cup-shaped flexible main structure layer and an edge adhesion layer. When placed on the skin surface, the adhesion layer forms a preliminary seal on the skin surface; then the vacuum pump extracts air from the sealed cavity through the side airway to reduce the internal pressure, and the suction cup is firmly fixed on the skin surface by negative pressure. In addition, a pressure loading unit (inflatable structure) with a bellows structure is designed inside the bionic suction cup to convert the multi-directional air pressure during airbag inflation into a vertical pressure perpendicular to the skin surface. The annular bellows design realizes effective pressure transduction, and the radial compression of the bellows is converted into displacement along the axial direction. Combined with the air pressure control module, effective pressure transmission and controllable loading can be achieved. Further, a high-sensitivity pressure sensor is integrated at the front end of the pressure loading unit, and a signal acquisition and transmission module is combined. The pressure loading unit applies a controllable local pressure to the arterial detection site, thereby realizing effective detection of pulse pressure signals under different pressure states.

[0093] Fig. 9 A flow chart of a pulse detection method provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the method is applied to a wearable device, and the method includes:

[0094] Step 901: using a pulse detection module to detect current pressure information of the measured object when the pressure applying module applies pressure to the measured object under the current pressure signal, and outputting a pulse signal of the measured object according to the current pressure information of the measured object;

[0095] Step 902: using the control module to determine whether the measured object needs to be pressurized according to the current pressure information; if the measured object needs to be pressurized, sending a pressurization signal to the pressure applying module;

[0096] Step 903: Use the pressure application module to pressurize the pulse detection module according to the pressurization signal until the adapted pressurization signal of the target body is obtained, and then continue to send the adapted pressurization signal to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal.

[0097] In some optional embodiments, the pulse detection module is used to detect the current pressure information of the target body when the pressure application module applies pressure to the target body under the current pressure signal, and the pulse signal of the target body is output according to the current pressure information of the target body, including:

[0098] Using the pulse detection module to detect the Nth pressure information on the measured object when the pressure applying module applies pressure to the measured object under the Nth pressure signal, and outputting the pulse signal of the measured object according to the Nth pressure information on the measured object;

[0099] The method comprises: applying pressure to the pulse detection module according to the pressure signal until the adapted pressure signal of the detected object is obtained, and then continuing to send the adapted pressure signal to the pulse detection module, so that the pulse detection module can output a pulse signal adapted to the detected object according to the adapted pressure signal, including:

[0100] The pressure applying module is used to pressurize the pulse detection module according to the Nth pressurization signal to obtain the N+1th pressurization signal. If the N+1th pressurization signal is an adapted pressurization signal for the target body, the pressure applying module is used to send the N+1th pressurization signal to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the N+1th pressurization signal, wherein the N+1th pressurization signal is different from the pressure information received by the target body under the Nth pressurization signal, and N is a positive integer greater than or equal to 1.

[0101] In some optional embodiments, the using the control module to determine whether the measured target needs to be pressurized according to the current pressure information includes:

[0102] The control module determines whether the current pressure information meets the standard pressure range of the measured target body according to the current pressure information;

[0103] If the current pressure information meets the standard pressure range of the measured object, it is determined that the measured object does not need to be pressurized.

[0104] In some optional embodiments, if the current pressure information does not conform to the standard pressure range of the measured object, it is determined that the measured object needs to be pressurized.

[0105] In some optional embodiments, the method further includes:

[0106] If the current pressure information does not meet the standard pressure range of the measured target body, the control module sends the pressurization information to the pressure application module to the pulse detection module; the pressurization signal includes: a positive pressure signal and a negative pressure signal;

[0107] The pulse detection module adsorbs the detected target body according to the negative pressure signal, and detects the pulse signal after pressurizing the detected target body according to the positive pressure signal.

[0108] It should be noted that the description of the pulse detection method is similar to the description of the pulse detection system. The beneficial effects of the same method are not described in detail. For technical details not disclosed in the embodiment of the pulse detection method of the present invention, please refer to the description of the embodiment of the pulse detection system of the present invention.

[0109] For example, see Fig.10 , Fig.10 A schematic diagram of a specific working process of the pulse detection method provided by an embodiment of the present invention is shown in FIG. Fig.10 As shown, the conformal adsorption unit in the bionic adaptive pressure loading module first forms negative pressure on the skin surface through the air pumping path to firmly adsorb on the detection part. Then the pressure loading unit applies pressure to the detection part at a slow and uniform speed, and collects the pulse pressure signal under the corresponding state at the same time.

[0110] For example, see Fig.11 , Fig.11 FIG. 1 is a schematic diagram of a pulse detection result detected by the pulse detection method provided by an embodiment of the present invention, as shown in FIG. Fig.11 As shown in the figure, as the air pressure in the bellows pressurized airbag increases slowly, the amplitude of the pulse wave first increases slowly to a peak value, and then gradually decreases. In this process, the pulse wave with the largest amplitude is considered the most suitable pulse wave signal, and the corresponding air pressure value in the airbag when the pulse amplitude reaches the peak value is recorded as the optimal pulse detection pressure condition. Then, through program control, the pressure in the airbag is released and reapplied to the air pressure value under the optimal pulse detection pressure and remains unchanged, so as to achieve adaptive optimal pulse pressure monitoring.

[0111] For example, see Fig.12 , Fig.12 A schematic diagram of pulse detection results of different detection parts of the same individual provided by an embodiment of the present invention, such as Fig.12 As shown, by using the optimal pulse pressure detection signal at different arterial detection sites (superficial temporal artery, brachial artery, radial artery), firm and stable conformal adsorption and clear and stable pulse pressure detection can be achieved at different arterial detection sites.

[0112] For example, see Fig.13 , Fig.13Schematic diagram of pulse detection results of different individuals provided by the embodiment of the present invention, such as Fig.13 As shown in the comparative test results of subjects with thick arms (27-year-old males) and thin arms (24-year-old females), the pulse wave amplitude was significantly enhanced (about three times) and the number of pulse wave feature points was increased through adaptive pressurization, providing high-quality pulse signals for further diagnostic analysis, thereby effectively realizing cross-individual adaptive pulse pressure detection capabilities.

[0113] In the above embodiment, a pulse detection method is designed, that is, a local pressurization method is used by a pressure loading unit to change the pulse intensity, thereby causing the signal amplitude collected by the pressure sensor to change. The externally loaded pressure is automatically adjusted by the program according to the change in pulse amplitude to achieve standardized detection of the pulse signal under the optimal pressure. In addition, a flexible bionic suction cup, a pressure loading unit, a pressure sensor, a signal acquisition and transmission module, and a pneumatic control module are integrated to design a bionic adaptive pulse pressure sensing system. An adaptive pressure adjustment strategy is used to achieve accurate detection of the optimal pulse pressure in different arterial locations and for different individuals. The system helps to standardize and quantify the pulse pressure detection method, and has significant advantages such as portability, ease of operation, and a wide range of applications.

[0114] In summary, the embodiments of the present invention, through the bionic suction cup structure, combined with flexible pneumatic control technology and pressure sensing technology, can achieve conformal adsorption of different skin surfaces, controllable pressure loading, and dynamic measurement of human arterial pulse at different depths. It cleverly solves the problems of weak signals and waveform distortion when wearable pressure sensors detect pulse signals, has a significant enhancement effect on pulse pressure signals, and realizes adaptive standardized pulse pressure detection across individuals and parts. In addition, the system can also simulate the floating, middle and sinking pulse taking techniques in traditional pulse diagnosis, that is, applying different pressures to the part to be tested to capture the changing characteristics of the pulse wave signal with pressure.

[0115] Compared with traditional PPG and other pulse measurement methods, the present invention introduces vacuum conformal adsorption technology and local pressure loading technology through a bionic structure, providing an accurate and stable optimal pulse pressure detection signal. It has the advantages of small structure, easy use, strong adaptability, etc. It is particularly suitable for adaptive pulse pressure measurement of different individuals and different physiological conditions.

[0116] The embodiment of the present invention further provides a wearable device, wherein the wearable device is integrated with a pulse detection device, such as Fig.14 As shown, the pulse detection device includes a memory 1402, a processor 1401, and computer instructions stored in the memory 1402 and executable on the processor 1401; when the processor 31 executes the instructions, the steps applied to the pulse detection method are implemented.

[0117] In some embodiments, the memory 1402 in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). The memory 1402 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0118] The processor 1401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 1401 or the instruction in the form of software. The above processor 1401 may be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly embodied as a hardware decoding processor to be executed, or a combination of hardware and software modules in the decoding processor to be executed. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1402, and the processor 1401 reads the information in the memory 1402 and completes the steps of the above method in combination with its hardware.

[0119] In some embodiments, the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSP devices, DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or a combination thereof.

[0120] For software implementation, the techniques described herein can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0121] Another embodiment of the present invention provides a computer storage medium, which stores an executable program. When the executable program is executed by the processor 1401, the steps applied to the pulse detection method can be implemented. For example, Fig. 9 One or more of the methods shown.

[0122] In some embodiments, the computer storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0123] It should be noted that the technical solutions described in the embodiments of the present invention can be combined arbitrarily without conflict.

[0124] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A pulse detection system, applied to a wearable device, characterized in that: The pulse detection system comprises: a pulse detection module, a pressure application module and a control module, wherein the pulse detection module, the pressure application module and the control module are interconnected; The pulse detection module is connected between the pressure applying module and the control module, and is used to detect the current pressure information of the target body when the pressure applying module applies pressure to the target body under the current pressure signal, and output the pulse signal of the target body according to the current pressure information of the target body; The control module is connected between the pulse detection module and the pressure application module, and is used to determine whether the measured object needs to be pressurized according to the current pressure information; if the measured object needs to be pressurized, the control module sends a pressurization signal to the pressure application module; The pressure applying module is connected between the pulse detection module and the control module. The pressure applying module is used to pressurize the pulse detection module according to the pressurization signal until the adapted pressurization signal of the target body is obtained, and then maintain sending the adapted pressurization signal to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal.

2. The pulse detection system according to claim 1, characterized in that: The pressurization signal includes: a negative pressure signal and a positive pressure signal; The pulse detection module comprises: a conformal adsorption unit, a pressure loading unit and a pressure sensing unit; The conformal adsorption unit is connected to the pressure applying module and is used to perform negative pressure adsorption on the measured target according to the negative pressure signal provided by the pressure applying module; The pressure loading unit is connected to the pressure applying module and is used to pressurize the measured target according to the positive pressure signal provided by the pressure applying module; The pressure sensing unit is connected to the pressure loading unit and is used to detect pulse and current pressure information based on the pressure loading unit applying pressure to the measured object through the conformal adsorption unit.

3. The pulse detection system according to claim 2, characterized in that: The pressure loading unit includes a bellows pressurized airbag; the conformal adsorption unit includes a flexible cup body, which is made of flexible material and the mouth of which can be adjusted in diameter according to the target object to be detected; the bellows pressurized airbag is configured as a circle around the inner side of the flexible cup body, and is used to pressurize the target object to be detected based on the positive pressure signal.

4. The pulse detection system according to claim 3, characterized in that: The flexible cup body comprises: a flexible main body layer and a high modulus top layer covering the flexible main body layer; the pressure applying module comprises: a first vacuum pump and a second vacuum pump; The bellows pressurized airbag is arranged around the inner side of the flexible main body layer; A side air path is provided on the side periphery of the flexible main body layer for receiving a second vacuum pump to absorb the air in the flexible cup body based on a negative pressure signal so as to absorb the measured target body in contact with the cup mouth of the flexible cup body; The high modulus top layer and the flexible main body layer are both provided with top air paths, and the top air paths are connected to the bellows pressurized airbag for receiving the first vacuum pump to inflate the bellows pressurized airbag based on the positive pressure signal to pressurize the measured target body.

5. A pulse detection method, applied to a wearable device, characterized in that: The method comprises: Using the pulse detection module to detect the current pressure information of the measured object when the pressure applying module applies pressure to the measured object under the current pressure signal, and outputting the pulse signal of the measured object according to the current pressure information of the measured object; Using the control module to determine whether the measured object needs to be pressurized according to the current pressure information; if the measured object needs to be pressurized, sending a pressurization signal to the pressure applying module; The pressure applying module pressurizes the pulse detection module according to the pressurization signal until an adapted pressurization signal of the target body is obtained, and then continues to send the adapted pressurization signal to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the adapted pressurization signal.

6. The method according to claim 5, characterized in that The method of using the pulse detection module to detect the current pressure information of the target body when the pressure applying module applies pressure to the target body under the current pressure signal, and outputting the pulse signal of the target body according to the current pressure information of the target body, includes: Using the pulse detection module to detect the Nth pressure information on the measured object when the pressure applying module applies pressure to the measured object under the Nth pressure signal, and outputting the pulse signal of the measured object according to the Nth pressure information on the measured object; The method comprises: applying pressure to the pulse detection module according to the pressure signal until the adapted pressure signal of the detected object is obtained, and then continuing to send the adapted pressure signal to the pulse detection module, so that the pulse detection module can output a pulse signal adapted to the detected object according to the adapted pressure signal, including: The pressure applying module is used to pressurize the pulse detection module according to the Nth pressurization signal to obtain the N+1th pressurization signal. If the N+1th pressurization signal is an adapted pressurization signal for the target body, the pressure applying module is used to send the N+1th pressurization signal to the pulse detection module so that the pulse detection module can output a pulse signal adapted to the target body according to the N+1th pressurization signal, wherein the N+1th pressurization signal is different from the pressure information received by the target body under the Nth pressurization signal, and N is a positive integer greater than or equal to 1.

7. The method according to claim 5, characterized in that The using the control module to determine whether the measured target needs to be pressurized according to the current pressure information includes: The control module determines whether the current pressure information meets the standard pressure range of the measured target body according to the current pressure information; If the current pressure information meets the standard pressure range of the measured object, it is determined that the measured object does not need to be pressurized.

8. The method according to claim 7, characterized in that The method further comprises: If the current pressure information does not meet the standard pressure range of the measured object, it is determined that the measured object needs to be pressurized.

9. The method according to claim 8, characterized in that The method further comprises: If the current pressure information does not meet the standard pressure range of the measured target body, the control module sends the pressurization information to the pressure application module to the pulse detection module; the pressurization signal includes: a positive pressure signal and a negative pressure signal; The pulse detection module adsorbs the detected target body according to the negative pressure signal, and detects the pulse signal after pressurizing the detected target body according to the positive pressure signal.

10. A wearable device, characterized in that: A pulse detection device is integrated, the pulse detection device comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is used to implement the pulse detection method according to any one of claims 5 to 9 when running the computer program.

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