Wearable device and control method and device thereof

Abstract

The invention provides a wearable device and a control method and device thereof, and belongs to the technical field of wearable devices. The bottom shell assembly is arranged at the bottom of the main body, the bottom shell assembly comprises a fixed part, a movable part and a telescopic part, the fixed part is connected with the main body, the middle positions of the movable part and the fixed part are opposite, and the movable part can move relative to the fixed part; the telescopic piece is connected with the fixed part and the movable part or the main body and the movable part; the movable part comprises a PPG sensor and a pressure sensor; the telescopic piece is used for driving the movable part to get away from or get close to the main body; when a user wears the wearable device, the pressure value detected by the pressure sensor is adjusted through stretching and retracting of the telescopic piece.

Description

Technical Field

[0001] This application belongs to the technical field of wearable devices, and particularly relates to a wearable device, a control method and a device thereof. Background Art

[0002] Currently, wearable devices based on Photoplethysmography (PPG) can monitor human physiological parameters. However, due to the different tightness levels at which users wear the wearable devices, the squeezing force on the skin by the wearable devices changes accordingly, and the waveform of the PPG signal will be distorted, resulting in inaccurate extraction of key feature points, thereby affecting the accuracy and reliability of physiological parameter monitoring. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a wearable device, a control method and a device thereof, which can effectively solve the technical problem that the reliability of the PPG signal is affected by the tightening degree of the user's wearing of the wearable device.

[0004] In a first aspect, the embodiments of this application provide a wearable device, including:

[0005] A main body;

[0006] A bottom shell assembly disposed at the bottom of the main body. The bottom shell assembly includes a fixing part, a movable part and a telescopic member. The fixing part is connected to the main body. The middle positions of the movable part and the fixing part face each other, and the movable part is movable relative to the fixing part; the telescopic member connects the fixing part and the movable part, or the telescopic member connects the main body and the movable part; the movable part includes a PPG sensor and a pressure sensor, and the telescopic member is used to drive the movable part away from or close to the main body;

[0007] Wherein, when a user wears the wearable device, the pressure value detected by the pressure sensor is adjusted through the expansion and contraction of the telescopic member.

[0008] In a second aspect, the embodiments of this application provide a control method for a wearable device, which is executed by the wearable device provided in the embodiments of the first aspect. The method includes:

[0009] When a user wears the wearable device, obtain the pressure value detected by the pressure sensor;

[0010] Determine the relationship between the pressure value and a preset pressure range;

[0011] When the pressure value is greater than the upper limit value of the preset pressure range, control the telescopic member to shorten;

[0012] When the pressure value is less than the lower limit value of the preset pressure range, control the telescopic member to extend.

[0013] In a third aspect, an embodiment of the present application provides a control device for a wearable device, which is used for the wearable device provided in the embodiment of the first aspect. The device includes:

[0014] An acquisition module, configured to acquire the pressure value detected by the pressure sensor when the user wears the wearable device;

[0015] A determination module, configured to determine the relationship between the pressure value and a preset pressure range;

[0016] A first control module, configured to control the telescopic member to shorten when the pressure value is greater than the upper limit value of the preset pressure range;

[0017] A second control module, configured to control the telescopic member to extend when the pressure value is less than the lower limit value of the preset pressure range.

[0018] In a fourth aspect, an embodiment of the present application provides an electronic device, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the control method for the wearable device provided in the second aspect are implemented.

[0019] In a fifth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by the processor, the steps of the control method for the wearable device provided in the second aspect are implemented.

[0020] In a sixth aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the steps of the control method for the wearable device provided in the second aspect.

[0021] In a seventh aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the steps of the control method for the wearable device provided in the second aspect.

[0022] In the embodiment of the present application, the wearable device includes a main body and a bottom shell assembly disposed at the bottom of the main body. Among them, the bottom shell assembly includes a fixed part, a movable part, and a telescopic member. The fixed part is connected to the main body, and the middle positions of the movable part and the fixed part are opposite to ensure uniform pressure when the movable part contacts the human skin. The movable part includes a PPG sensor and a pressure sensor. The PPG sensor can output a PPG signal, and the pressure sensor can detect the pressure value between the movable part and the human skin.

[0023] The fixed part and the movable part are connected by a telescopic member, or the main body and the movable part are connected by a telescopic member. Further, the telescopic member can drive the movable part away from the main body, and the telescopic member can also drive the movable part closer to the main body. Further, when the user wears the wearable device, the pressure value detected by the pressure sensor can be adjusted by the expansion and contraction of the telescopic member, that is, the pressure value between the movable part and the user's body, so as to ensure that the pressure between the PPG sensor and the user's skin is always within a reasonable pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor and improving the accuracy and reliability of the wearable device for monitoring the user's physiological parameters. Brief Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 Fig. 1 shows one of the schematic diagrams of the wearable device provided by an embodiment of the present application;

[0026] Figure 2 Fig. 2 shows a second cross-sectional view of the wearable device provided by an embodiment of the present application;

[0027] Figure 3 Fig. 3 shows a third cross-sectional view of the wearable device provided by an embodiment of the present application;

[0028] Figure 4 Fig. 4 shows a fourth cross-sectional view of the wearable device provided by an embodiment of the present application;

[0029] Figure 5 Fig. 5 shows a fifth cross-sectional view of the wearable device provided by an embodiment of the present application;

[0030] Figure 6 Fig. 6 shows a sixth cross-sectional view of the wearable device provided by an embodiment of the present application;

[0031] Figure 7 Fig. 7 shows a seventh cross-sectional view of the wearable device provided by an embodiment of the present application;

[0032] Figure 8 Fig. 8 shows an eighth cross-sectional view of the wearable device provided by an embodiment of the present application;

[0033] Figure 9 Fig. 9 shows a ninth cross-sectional view of the wearable device provided by an embodiment of the present application;

[0034] Figure 10 Fig. 10 shows the type of shape memory alloy adopted by the telescopic member in the wearable device provided by an embodiment of the present application and the schematic diagram of its shape change;

[0035] Figure 11Shows one of the flowcharts of the control method of the wearable device provided by an embodiment of the present application;

[0036] Figure 12 Shows the second flowchart of the control method of the wearable device provided by an embodiment of the present application;

[0037] Figure 13 Shows the structural block diagram of the control device of the wearable device according to an embodiment of the present application;

[0038] Figure 14 Shows the structural block diagram of the wearable device according to an embodiment of the present application;

[0039] Figure 15 Shows the schematic diagram of the hardware structure of a wearable device implementing an embodiment of the present application.

[0040] Figures 1 to 9 Reference numerals:

[0041] 100 Wearable device, 110 Main body, 112 Display part, 114 Wearing component installation part, 116 Driving circuit, 118 Temperature-changing device, 120 Switching switch, 130 Bottom shell assembly, 132 Fixing part, 134 Through hole, 136 Moving part, 138 PPG sensor, 140 Pressure sensor, 142 Telescopic part, 160 Temperature sensor, 170 Protective sleeve, 180 Conducting wire. Detailed implementation manners

[0042] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0043] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Next, in conjunction with Figures 1 to 15 describe a wearable device 100 and its control method and device according to an embodiment of the present application.

[0047] In a first aspect, as Figures 1 to 10 shown, an embodiment of the present application provides a wearable device 100, including: a main body 110; a bottom shell assembly 130 disposed at the bottom of the main body 110, the bottom shell assembly 130 including a fixing portion 132, a movable portion 136, and a telescopic member 142, the fixing portion 132 being connected to the main body 110, the middle position of the movable portion 136 being opposite to the fixing portion 132, and the movable portion 136 being movable relative to the fixing portion 132; the telescopic member 142 connecting the fixing portion 132 and the movable portion 136, or the telescopic member 142 connecting the main body 110 and the movable portion 136; the movable portion 136 including a PPG sensor 138 and a pressure sensor 140, the telescopic member 142 being configured to drive the movable portion 136 away from or close to the main body 110; wherein, when the user wears the wearable device 100, the pressure value detected by the pressure sensor 140 is adjusted by the expansion and contraction of the telescopic member 142.

[0048] In an embodiment of the present application, the wearable device 100 includes a main body 110 and a bottom shell assembly 130 disposed at the bottom of the main body 110. Among them, the bottom shell assembly 130 includes a fixing portion 132, a movable portion 136, and a telescopic member 142. The fixing portion 132 is connected to the main body 110, and the middle position of the movable portion 136 is opposite to that of the fixing portion 132 to ensure uniform pressure when the movable portion 136 contacts the human skin. The movable portion 136 includes a PPG sensor 138 and a pressure sensor 140. The PPG sensor 138 can output a PPG signal, and the pressure sensor 140 can detect the pressure value between the movable portion 136 and the human skin.

[0049] The fixing portion 132 and the movable portion 136 are connected by the telescopic member 142, or the main body 110 and the movable portion 136 are connected by the telescopic member 142. Furthermore, the telescopic member 142 can drive the movable portion 136 away from the main body 110, and the telescopic member 142 can also drive the movable portion 136 closer to the main body 110. Then, when the user wears the wearable device 100, the pressure value detected by the pressure sensor 140 can be adjusted by the telescopic movement of the telescopic member 142, that is, the pressure value between the movable portion 136 and the user. Thus, it is ensured that the pressure between the PPG sensor 138 and the user's skin is always within a reasonable pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor 138 and enhancing the accuracy and reliability of the wearable device 100 for monitoring the user's physiological parameters.

[0050] Specifically, after the user wears the wearable device 100, the pressure sensor 140 can detect the pressure value between the wearable device 100 and the user's skin, compare this pressure value with a preset pressure range, and control the telescopic member 142 to extend or contract when the pressure value is outside the preset pressure range, so that the pressure value detected by the pressure sensor 140 is within the preset pressure range.

[0051] In practical applications, the optimal contact pressure range between the user's skin and the wearable device 100 analyzed through big data can be set as the preset pressure range. The wearable device 100 dynamically adjusts the pressure value Pt between it and the user's skin to keep it always within the preset pressure range, thereby ensuring the stability of the waveform of the PPG signal and the reliability of the accurate extraction of key feature points, and optimizing the accuracy of measuring human physiological parameters such as PPG for blood pressure.

[0052] As Figure 1 shown, as a possible implementation manner, the first side of the main body 110 has a display portion 112, and the bottom shell assembly 130 is disposed on the second side of the main body 110. The first side and the second side are two opposite sides of the main body 110; among them, a wearing component mounting portion 114 is provided on the main body 110 or the fixing portion 132.

[0053] Specifically, the main body 110 has a first side and a second side facing away from each other. The first side of the main body 110 has a display portion 112 for displaying information. The bottom shell assembly 130 is disposed on the second side of the main body 110. And a wearing component mounting portion 114 is provided on the main body 110 or the fixing portion 132. When the user wears the wearable device 100, it is fixed by the wearing component mounted on the wearing component mounting portion 114. Thus, the bottom shell assembly 130 presses on the user's skin, and the display portion 112 faces away from the user's skin, facilitating the user to view the information displayed by the display portion 112.

[0054] Wherein, the wearing component mounting portion 114 is for the user to install the wearing component, and the wearing component can be a strap or a magic tape, etc.

[0055] As a possible implementation manner, as Figure 3 shown, the fixing portion 132 has a through hole 134 for passing through a wire 180. The movable portion 136 is located on the side of the fixing portion 132 away from the main body 110. The telescopic member 142 is fixed to the side of the fixing portion 132 facing the movable portion 136 and is connected to the movable portion 136; or as Figure 4 shown, the fixing portion 132 has a through hole 134, and the movable portion 136 is disposed in the through hole 134. The telescopic member 142 is fixed to the side of the main body 110 facing the movable portion 136 and is connected to the movable portion 136.

[0056] Specifically, as Figure 3 shown, the fixing portion 132 has a through hole 134 for passing through a wire 180. The wire 180 realizes the power supply and communication of the PPG sensor 138, the pressure sensor 140, and the telescopic member 142. The movable portion 136 is disposed on the side of the fixing portion 132 away from the main body 110. The telescopic member 142 is disposed between the fixing portion 132 and the movable portion 136. And the telescopic member 142 connects the fixing portion 132 and the movable portion 136. That is, the movable portion 136 is supported on the side of the fixing portion 132 away from the main body 110 through the telescopic member 142, so as to ensure that the PPG sensor 138 and the pressure sensor 140 in the movable portion 136 can be in more sufficient contact with the user's skin, ensuring the reliability and accuracy of the detection results of the PPG sensor 138 and the pressure sensor 140.

[0057] Or, as Figure 4 shown, the fixing portion 132 has a through hole 134, and the movable portion 136 is disposed in the through hole 134. The telescopic member 142 is located between the main body 110 and the movable portion 136. And the telescopic member 142 connects the main body 110 and the movable portion 136. That is, the movable portion 136 is supported in the through hole 134 of the fixing portion 132 through the telescopic member 142, which is beneficial to reducing the thickness of the wearable device 100 and facilitating the thinning of the wearable device 100.

[0058] As Figures 1 to 10 shown, as a possible implementation, the telescopic member 142 is annular, and the telescopic member 142 surrounds the through hole 134 or is located within the through hole 134; or the telescopic member 142 is columnar or sheet-shaped, and the number of telescopic members 142 is at least two. The at least two telescopic members 142 are arranged at intervals, and the telescopic member 142 is located outside the edge of the through hole 134 or within the through hole 134.

[0059] Specifically, the telescopic member 142 is annular, the telescopic member 142 surrounds the through hole 134, and the telescopic member 142 connects the fixed portion 132 and the movable portion 136. Thus, when the telescopic member 142 expands and contracts, it drives the movable portion 136 to move as a whole, thereby ensuring the stability of the movement of the movable portion 136. Moreover, the annular telescopic member 142 has a stronger supporting force, which can ensure the supporting effect on the movable portion 136.

[0060] Or the telescopic member 142 is annular, the telescopic member 142 is arranged within the through hole 134, and the telescopic member 142 connects the main body 110 and the movable portion 136. Thus, when the telescopic member 142 expands and contracts, it drives the movable portion 136 to move as a whole, thereby ensuring the stability of the movement of the movable portion 136. Moreover, the annular telescopic member 142 has a stronger supporting force, which can ensure the supporting effect on the movable portion 136.

[0061] Or the telescopic member 142 is columnar or sheet-shaped, the number of telescopic members 142 is at least two, and the at least two telescopic members 142 are arranged at intervals on the fixed portion 132. The telescopic member 142 is located outside the edge of the through hole 134, and the telescopic member 142 connects the fixed portion 132 and the movable portion 136. This is to perform multi-point support on the movable portion 136 by the telescopic member 142, thereby reducing the investment in the telescopic member 142 and lowering the production cost.

[0062] Or the telescopic member 142 is columnar or sheet-shaped, the number of telescopic members 142 is at least two, and the at least two telescopic members 142 are arranged at intervals on the main body 110. The telescopic member 142 is located inside the through hole 134, and the telescopic member 142 connects the main body 110 and the movable portion 136. This is to perform multi-point support on the movable portion 136 by the telescopic member 142, thereby reducing the investment in the telescopic member 142 and lowering the production cost.

[0063] As Figure 3 shown, as a possible implementation, the telescopic member 142 is made of a deformable material; wherein, one end of the telescopic member 142 is fixed to the main body 110 or the fixed portion 132, and the other end of the telescopic member 142 is fixed to the movable portion 136.

[0064] Specifically, the telescopic member 142 is made of a deformable material. By changing the microscopic state of the telescopic member 142, the length of the telescopic member 142 can be macroscopically changed, thereby realizing the adjustment of the length of the telescopic member 142. Moreover, the telescopic member 142 made of the deformable material can achieve fast and high-precision adjustment.

[0065] As Figure 3 shown, as a possible implementation, the telescopic member 142 is made of an electro-deformable material. A driving circuit 116 is provided in the main body 110. The driving circuit 116 is electrically connected to the telescopic member 142. The driving circuit 116 is configured to supply current to the telescopic member 142 to cause the telescopic member 142 to extend or contract.

[0066] Specifically, the telescopic member 142 is made of an electro-deformable material. A driving circuit 116 is provided in the main body 110. The driving circuit 116 is electrically connected to the telescopic member 142. Thus, the driving circuit 116 can supply an electric circuit to the telescopic member 142. Affected by the current, the telescopic member 142 extends or contracts, thereby realizing the rapid change of the telescopic member 142.

[0067] The characteristic of the electro-deformable material is that its length will change under the influence of an electric field or current. That is, by outputting an electric field or current to the telescopic member 142, the length of the telescopic member 142 can be changed. The extension or contraction of the electro-deformable material is related to the direction of the electric field applied to the electro-deformable material. Therefore, the driving circuit 116 can control the direction of the electric field output to the telescopic member 142 according to the relationship between the pressure value detected by the pressure sensor 140 and the preset pressure range, so that the telescopic member 142 extends or contracts. Moreover, the driving circuit 116 adjusts the intensity of the electric field output to the telescopic member 142 according to the specific value of the pressure value detected by the pressure sensor 140, so as to adjust the length of the telescopic member 142 to the required length, ensuring that the pressure between the wearable device 100 and the user's skin conforms to the preset pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor 138 and enhancing the accuracy and reliability of the wearable device 100 for monitoring the user's physiological parameters. Moreover, the electro-deformable material has high reliability and fast reaction speed.

[0068] The electro-deformable material can achieve the electrostrictive effect, which is an electro-mechanical coupling phenomenon. It refers to the reversible mechanical deformation of the electro-deformable material under the action of an external electric field. The rearrangement of the electric dipoles induced by the electric field will cause the change of the electrostatic force distribution between molecules, and then lead to the change of the distance between molecules. This microscopic change in the intermolecular distance will be macroscopically manifested as the mechanical deformation of the material, such as stretching, compression or bending. The electrostrictive effect widely exists in some ceramic and polymer materials, mainly including piezoelectric ceramics, such as barium titanate (BaTiO 3) such as lead zirconate titanate (PZT), electroactive polymers, or polyvinylidene fluoride (PVDF).

[0069] The relationship between the electrostrictive mechanical strain (S) and the applied electric field (E) of the electro-deformable material can be expressed as: S = Q × E 2 , where S is the strain of the electro-deformable material (the ratio of the deformation amount to the original size), E is the intensity of the applied electric field; Q is the electrostrictive coefficient, which is an inherent property of the electro-deformable material and determines the sensitivity of the material to the electric field response. By changing the direction and magnitude of the electric field, the amount of expansion and contraction of the electro-deformable material can be controlled. When the direction of the electric field is the same as the direction of the spontaneous polarization of the crystal in the electro-deformable material, the electro-deformable material elongates, and when the direction of the electric field is opposite to the direction of the spontaneous polarization of the crystal of the electro-deformable material, the length of the material shortens.

[0070] A PPG sensor 138 is provided on the movable part 136, which can monitor physiological parameters such as heart rate, blood oxygen, and blood pressure. In this application, the main body 110 is connected to the PPG sensor 138 and the pressure sensor 140 on the movable part 136 through a flexible printed circuit (FPC). As Figure 2 , Figure 3 and Figure 4 shown, the main body 110 and the movable part 136 are connected by a telescopic member 142, or the fixed part 132 and the movable part 136 are connected by a telescopic member 142, and the deformation of the telescopic member 142 is controlled by an electric field to push the movable part 136 to move up and down. The movable part 136 includes a PPG sensor 138 and a pressure sensor 140. The two can be embedded in the same structural member, or the two are integrated into one component. For example, the PPG sensor 138 and the pressure sensor 140 are arranged on the matching contact surface of the movable structural member and the user to collect data of the contact pressure value in real time and transmit it to the main body 110. At least one of a central processing unit, a system-on-chip, and a microcontroller unit (MCU) is provided in the main body 110.

[0071] Specifically, as Figure 5As shown, when the pressure sensor 140 detects that the current pressure value Pt is higher than the upper limit of the preset pressure range, the main body 110 determines that it is necessary to reduce the contact pressure value between the wearable device 100 and the skin. The drive circuit 116 of the drive circuit 116 adjusts the direction of the electric field, making the polarization direction of its telescopic member 142 opposite to itself, shortening the telescopic member 142, and at the same time adjusting the intensity of the electric field to control the deformation amount of the telescopic member 142. The telescopic member 142 drives the bottom movable part 136 to move upward, that is, to move in the second direction. As the movable part 136 moves upward, the pressure value detected by the pressure sensor 140 gradually decreases. The closed-loop feedback control stops adjusting after the pressure value returns to the preset pressure range and stabilizes in this state.

[0072] As Figure 6 shown, when the pressure sensor 140 detects that the current pressure value Pt is lower than the lower limit value of the preset pressure range, the main body 110 determines that it is necessary to increase the contact pressure value between the wearable device 100 and the skin. The drive circuit 116 adjusts the direction of the electric field, making the polarization direction of its telescopic member 142 the same, elongating the telescopic member 142, and at the same time adjusting the intensity of the electric field to control the deformation amount of the telescopic member 142. The telescopic member 142 drives the movable part 136 to move downward. As the movable part 136 moves downward, that is, to move in the first direction, the pressure value detected by the pressure sensor 140 gradually increases. The closed-loop feedback control stops adjusting after the pressure value returns to the preset pressure range and stabilizes in this state.

[0073] The above embodiments can, after the user wears the wearable device 100, use the electrostrictive effect to adjust the pressure value of the contact between the wearable device 100 and the skin in real time. After the pressure value meets the preset pressure range, it is always constant at this pressure value. Ensure the integrity of the waveform of the PPG signal, thereby optimizing the accuracy of the PPG blood pressure. The structure and circuit of this embodiment are simple and easy to implement.

[0074] As Figure 8 and Figure 9As shown, as a possible implementation, a circuit formed by a drive circuit 116, a temperature-changing device 118, and a switching switch 120 is provided inside the main body 110. The telescopic member 142 is made of a shape memory alloy (SMA). When the drive circuit 116 operates, when the switching switch 120 is in the first state, the drive circuit 116 drives the temperature-changing device 118 to cool down. The telescopic member 142 is connected to the temperature-changing device 118 to cause the telescopic member 142 to elongate. When the switching switch 120 is in the second state, the drive circuit 116 drives the temperature-changing device 118 to heat up. The telescopic member 142 is connected to the temperature-changing device 118 to cause the telescopic member 142 to shorten. Or when the switching switch 120 is in the second state, the telescopic member 142 is electrically connected to the drive circuit 116, and the drive circuit 116 outputs a current to the telescopic member 142 to cause the telescopic member 142 to shorten.

[0075] Specifically, a circuit formed by a drive circuit 116, a temperature-changing device 118, and a switching switch 120 is provided inside the main body 110. The telescopic member 142 is made of a shape memory alloy (SMA). When the drive circuit 116 operates, when the switching switch 120 is in the first state, the drive circuit 116 can drive the temperature-changing device 118 to cool down. The telescopic member 142 is connected to the temperature-changing device 118, and the temperature of the telescopic member 142 decreases and it elongates.

[0076] As Figure 8 shown, when the switching switch 120 is in the second state, the drive circuit 116 drives the temperature-changing device 118 to heat up. The telescopic member 142 is connected to the temperature-changing device 118, and the temperature of the telescopic member 142 increases and it shortens. Or as Figure 9 shown, when the switching switch 120 is in the second state, the telescopic member 142 is electrically connected to the drive circuit 116, and the drive circuit 116 directly outputs a current to the telescopic member 142. The telescopic member 142 is affected by the current and its temperature increases and it shortens.

[0077] As above, the drive circuit 116 controls the switching switch 120 to be in the first state or the second state according to the relationship between the pressure value detected by the pressure sensor 140 and the preset pressure range, so that the telescopic member 142 elongates or shortens, ensuring that the pressure between the wearable device 100 and the user's skin conforms to the preset pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor 138 and enhancing the accuracy and reliability of the wearable device 100 for monitoring the user's physiological parameters.

[0078] Among them, the circuit formed by the driving circuit 116, the temperature-changing device 118, and the switching switch 120 can be in any form. The state change of the switching switch 120 lies in changing the state of connecting the temperature-changing device 118 to the telescopic member 142. For example, the temperature-changing device 118 includes a Peltier cooler. When the Peltier cooler is powered on, the temperature at one end rises and the temperature at the other end drops. Therefore, the temperature of the temperature-changing device 118 connected to the telescopic member 142 can be adjusted by the switching switch 120.

[0079] Such as Figure 7 , Figure 8 and Figure 9 As shown, as a possible implementation manner, it further includes: a temperature sensor 160, disposed on the telescopic member 142, and the temperature sensor 160 is electrically connected to the driving circuit 116; among them, the driving circuit 116 adjusts the power output to the temperature-changing device 118 or the intensity of the current output to the telescopic member 142 according to the temperature value detected by the temperature sensor 160, so as to adjust the length of the telescopic member 142.

[0080] Specifically, the electronic device further includes a temperature sensor 160. The temperature sensor 160 is disposed on the telescopic member 142. The temperature sensor 160 can detect the temperature of the telescopic member 142. There is a one-to-one correspondence between the length of the telescopic member 142 and its temperature. Therefore, the driving circuit 116 can accurately adjust the length of the telescopic member 142 according to the temperature value of the telescopic member 142 detected by the temperature sensor 160.

[0081] For example: after the switching switch 120 is adjusted to the first state according to the pressure value detected by the pressure sensor 140 and the preset pressure range, the power output to the temperature-changing device 118 is adjusted according to the temperature value detected by the temperature sensor 160, so as to achieve the effect of accurately adjusting the length of the telescopic member 142.

[0082] After the driving circuit 116 controls the switching switch 120 to be in the second state according to the pressure value detected by the pressure sensor 140 and the preset pressure range, the power output to the temperature-changing device 118 is adjusted according to the temperature value detected by the temperature sensor 160, so as to achieve the effect of accurately adjusting the length of the telescopic member 142.

[0083] Or after the switching switch 120 is adjusted to the second state according to the pressure value detected by the pressure sensor 140 and the preset pressure range, the power output to the telescopic member 142 is adjusted according to the temperature value detected by the temperature sensor 160, so as to achieve the effect of accurately adjusting the length of the telescopic member 142.

[0084] As described above, since the telescopic member 142 is also affected by the user's skin or environmental temperature, etc., by providing the temperature sensor 160, the reliability of the length adjustment of the telescopic member 142 can be ensured.

[0085] And the length of the telescopic member 142 is adjusted to the required length to ensure that the pressure between the wearable device 100 and the user's skin conforms to the preset pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor 138, enhancing the accuracy and reliability of the wearable device 100 for monitoring the user's physiological parameters. Moreover, the electroactive polymer material has high reliability and fast response speed.

[0086] Specifically, the telescopic member 142 is made of a shape memory alloy, which is an alloy that can restore a preset shape when heated or cooled. The shape change of the shape memory alloy is based on the martensite-austenite phase transformation. When the temperature reaches a specific transformation point, the shape memory alloy transforms from martensite to austenite and exhibits a predictable shape change (such as contraction or restoration of length). After cooling, the shape memory alloy returns to the martensite phase state and resumes its original shape. The known temperatures for the start of austenite phase transformation As, the complete transformation of austenite Af, the start of martensite formation Ms, and the complete transformation of martensite Mf. By controlling the temperature to rise between As and Af, the shrinkage characteristics of the shape memory alloy can be obtained, with different temperatures corresponding to different shrinkage states; by controlling the temperature to drop between Ms and Mf, the elongation characteristics of the shape memory alloy can be obtained, with different temperatures corresponding to different elongation states.

[0087] As Figure 5 and Figure 6 shown, as a possible implementation, the bottom shell assembly 130 further includes: a protective sleeve 170. The protective sleeve 170 is annular. One end of the protective sleeve 170 is connected to the fixing portion 132, and the other end of the protective sleeve 170 is connected to the movable portion 136. The protective sleeve 170 can move along with the movement of the movable portion 136, and the telescopic member 142 is located inside the protective sleeve 170.

[0088] Specifically, the wearable device 100 further includes a protective sleeve 170. Both ends of the protective sleeve 170 are respectively connected to the fixing portion 132 and the movable portion 136. The protective sleeve 170 protects the telescopic member 142 inside. Moreover, the protective sleeve 170 can move along with the movement of the movable portion 136, thereby reducing the possibility of damage to the telescopic member 142, and reducing the influence of the external environment on the telescopic member 142, ensuring the reliability of the telescopic member 142 for telescoping. The protective sleeve 170 can have dust and water resistance properties.

[0089] Among them, the protective sleeve 170 can be made of a flexible material, or the protective sleeve 170 can be a foldable protective sleeve 170, or the protective sleeve 170 can be formed by at least two sleeves nested with each other, or the protective sleeve 170 is connected by a slide rail.

[0090] As described above, the protective cover 170 can be a structure with telescopic ability, such as a spring or a plastic film, etc.

[0091] As Figure 7 , Figure 8 and Figure 9 As shown, in the present application, the telescopic member 142 connects the main body 110 and the movable part 136, or the telescopic member 142 connects the fixed part 132 and the movable part 136, thereby saving the internal space of the wearable device 100 and reducing the structural complexity. The telescopic member 142 is made of a shape memory alloy, and the outside of the telescopic member 142 can be coated with a flexible waterproof plastic, which supports the free expansion and contraction of the telescopic member 142. And, metal contacts are provided at the ends of the telescopic member 142 for heating or rapid low-temperature cooling. And, a temperature sensor 160 is provided on the telescopic member 142 for high-precision temperature monitoring.

[0092] As Figure 10 shown, the deformation of the shape memory alloy can generally be divided into one-way, two-way and full-course. Figure 10 Shows the shape of the shape memory alloy in the initial shape, low-temperature deformation, heating and cooling.

[0093] The telescopic member 142 in this embodiment can adopt a two-way shape memory alloy. At high temperature, the telescopic member 142 is in a bent state, and at low temperature, the telescopic member 142 is in an extended state. When the wearable device 100 is in an unworn state, the telescopic member 142 is not powered on, or the temperature-changing device 118 is not powered on. The fixed part 132 and the movable part 136 are connected through the telescopic member 142, or the main body 110 and the movable part 136 are connected through the telescopic member 142, and the distance between the two can be reduced by pressing. When the wearable device 100 recognizes that a living body is wearing it, but the pressure value Pt between the wearer's skin and the detection component is within the preset pressure range, then the telescopic member 142 or the temperature-changing device 118 is not powered on and remains in its original state.

[0094] When the wearable device 100 recognizes that a living body is wearing it, when the pressure value Pt between the wearer's skin and the movable part 136 is less than the lower limit value of the preset pressure range, the change-over switch 120 works and powers on the temperature-changing device 118. The temperature-changing device 118 includes a thermoelectric cooler, and the temperature-changing device 118 cools down rapidly. The telescopic member 142 is connected to the temperature-changing device 118. Specifically, the telescopic member 142 is connected to the electrothermal cooler, so as to achieve rapid cooling, and thus the telescopic member 142 elongates, driving the movable part 136 to move downward (towards the skin side), increasing the pressure value between the skin and the movable part 136. By adjusting the power output to the electrothermal cooler, the current temperature of the telescopic member 142 is accurately adjusted (checked and fed back through the temperature sensor 160), so as to obtain different lengths of the telescopic member 142, and further accurately control the pressure value between the movable part 136 and the skin.

[0095] Conversely, when the pressure value Pt between the wearer's skin and the movable part 136 is less than the lower limit value of the preset pressure range, the change-over switch 120 operates and supplies power to the temperature-changing device 118. The temperature-changing device 118 includes a thermoelectric cooler and rapidly heats up. The telescopic member 142 is connected to the temperature-changing device 118, or the telescopic member 142 can be directly connected to the drive circuit 116. Joule heat is obtained by heating (Q = I 2 Rt, where Q represents Joule heat, I represents current, R represents resistance, and t represents time) to achieve rapid temperature rise, so that the telescopic member 142 contracts, driving the movable part 136 to move upward (away from the skin side), reducing the pressure value between the skin and the movable part 136. By adjusting the magnitude of the current, the temperature of the current telescopic member 142 is precisely adjusted, thereby obtaining different lengths of the telescopic member 142, and further precisely controlling the pressure value between the movable part 136 and the skin.

[0096] The above structure is simple. The telescopic member 142 between the movable part 136 and the fixed part 132, or between the movable part 136 and the main body 110, is designed to be adjustable, and moreover, it is small in size and light in weight.

[0097] As Figure 1 shown, the wearable device 100 can be subdivided into a bottom shell assembly 130 with monitoring functions and a main body 110 with hardware functions such as display and communication. The bottom shell assembly 130 includes a fixed part 132 and a movable part 136. The fixed part 132 is located on the periphery of the movable part 136 and serves a protective function. The movable part 136 protrudes from the middle position of the fixed part 132 to form a health monitoring area. The PPG sensor 138 and the pressure sensor 140 are arranged on the movable part 136, and the movable part 136 is in direct contact with the user's skin.

[0098] In a second aspect, an embodiment of the present application provides a control method for a wearable device, which is executed by the wearable device provided in the embodiment of the first aspect. Figure 11 One of the flowcharts showing the control method of the wearable device according to the embodiment of the present application is shown. As Figure 11 shown, the control method of the wearable device includes:

[0099] Step 1102: When the user wears the wearable device, obtain the pressure value detected by the pressure sensor.

[0100] Specifically, when the wearable device detects that it is worn, the control component obtains the pressure value between the detection component and the user's skin detected by the pressure sensor.

[0101] Step 1104: Determine the relationship between the pressure value and the preset pressure range.

[0102] Specifically, compare the relationship between the pressure value and the size of the preset pressure range. The preset pressure range can be determined by means such as testing or experiments according to the specific model and the specific PPG sensor model.

[0103] Step 1106: When the pressure value is greater than the upper limit value of the preset pressure range, control the telescopic member to shorten.

[0104] Specifically, when the pressure value is greater than the upper limit value of the preset pressure range, the control component controls the telescopic member to shorten, thereby reducing the pressure value between the detection component and the user's skin to make it conform to the preset pressure range.

[0105] Step 1108: When the pressure value is less than the lower limit value of the preset pressure range, control the telescopic member to extend.

[0106] Specifically, when the pressure value is less than the lower limit value of the preset pressure range, the control component controls the telescopic member to extend, thereby increasing the pressure value between the detection component and the user's skin to make it conform to the preset pressure range.

[0107] In the embodiment of the present application, the wearable device includes a main body and a bottom shell component provided at the bottom of the main body. Among them, the bottom shell component includes a fixed part, a movable part and a telescopic member. The fixed part is connected to the main body, and the middle positions of the movable part and the fixed part face each other to ensure uniform pressure when the movable part contacts the human skin. The movable part includes a PPG sensor and a pressure sensor. The PPG sensor can output a PPG signal, and the pressure sensor can detect the pressure value between the movable part and the human skin.

[0108] The fixed part and the movable part are connected by a telescopic member, or the main body and the movable part are connected by a telescopic member. Furthermore, the telescopic member can drive the movable part away from the main body, and the telescopic member can also drive the movable part closer to the main body. Furthermore, when the user wears the wearable device, the pressure value detected by the pressure sensor can be adjusted by the telescopic movement of the telescopic member, that is, the pressure value between the movable part and the user. Thus, it is ensured that the pressure between the PPG sensor and the user's skin is always within a reasonable pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor and enhancing the accuracy and reliability of the wearable device for monitoring the user's physiological parameters.

[0109] After the user wears the wearable device, the pressure sensor can detect the pressure value between the wearable device and the user's skin, compare the pressure value with the preset pressure range, and when the pressure value is outside the preset pressure range, control the telescopic member to extend or shorten, so that the pressure value detected by the pressure sensor is within the preset pressure range.

[0110] In practical applications, the optimal contact pressure range between the user's skin and the wearable device can be analyzed through big data, and it can be set as a preset pressure range. The wearable device dynamically adjusts the pressure value Pt between it and the user's skin to keep it always within the preset pressure range, thereby ensuring the stability of the waveform of the PPG signal and the reliability of the accurate extraction of key feature points, and optimizing the accuracy of measuring human physiological parameters such as blood pressure by PPG.

[0111] As a possible implementation manner, the telescopic member is made of an electro-deformable material, and the polarization direction of the telescopic member is the first direction; when the pressure value is greater than the upper limit value of the preset pressure range, controlling the telescopic member to shorten includes: when the pressure value is greater than the upper limit value of the preset pressure range, outputting an electric field to the telescopic member, and the direction of the electric field is the second direction, and the second direction is opposite to the first direction; when the pressure value is less than the lower limit value of the preset pressure range, controlling the telescopic member to elongate includes: when the pressure value is less than the lower limit value of the preset pressure range, outputting an electric field to the telescopic member, and the direction of the electric field is the first direction.

[0112] Specifically, the telescopic member is made of an electro-deformable material, and the polarization direction of the telescopic member is the first direction. That is, by outputting an electric field to the telescopic member, the length of the telescopic member can be changed. The elongation or shortening of the electro-deformable material is related to the direction of the electric field applied to the electro-deformable material. Therefore, the control component controls the direction of the electric field output to the telescopic member according to the relationship between the pressure value detected by the pressure sensor and the preset pressure range. When the pressure value is greater than the upper limit value of the preset pressure range, an electric field is output to the telescopic member, and the direction of the electric field is the second direction, and the second direction is opposite to the first direction. When the pressure value is less than the lower limit value of the preset pressure range, an electric field is output to the telescopic member, and the direction of the electric field is the first direction. Thus, by controlling the direction of the electric field output to the telescopic member, the control of the extension or shortening of the telescopic member is realized.

[0113] As a possible implementation manner, after outputting an electric field to the telescopic member, it further includes: dynamically adjusting the intensity of the electric field according to the pressure value so that the pressure value is maintained within the preset pressure range.

[0114] Specifically, the degree of elongation or shortening of the telescopic member is related to the intensity of the electric field applied to the telescopic member. Therefore, the control component adjusts the intensity of the electric field output to the telescopic member according to the specific value of the pressure value detected by the pressure sensor, so as to adjust the length of the telescopic member to the required length to ensure that the pressure between the wearable device and the user's skin conforms to the preset pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor, and enhancing the accuracy and reliability of the wearable device for monitoring the user's physiological parameters. Moreover, the electro-deformable material has high reliability and fast response speed.

[0115] As a possible implementation, the control component includes a drive circuit, a temperature-changing device, a switching switch, and a temperature sensor. The telescopic member is made of a shape memory alloy. When the pressure value is greater than the upper limit value of the preset pressure range, controlling the telescopic member to shorten includes: when the pressure value is greater than the upper limit value of the preset pressure range, controlling the switching switch to be in the second state, and adjusting the power output to the temperature-changing device or adjusting the current output to the telescopic member according to the temperature value detected by the temperature sensor; when the pressure value is less than the lower limit value of the preset pressure range, controlling the telescopic member to elongate includes: when the pressure value is less than the lower limit value of the preset pressure range, controlling the switching switch to be in the first state, and adjusting the power output to the temperature-changing device according to the temperature value detected by the temperature sensor.

[0116] Specifically, the control component includes a circuit formed by a drive circuit, a temperature-changing device, and a switching switch. The telescopic member is made of a shape memory alloy, and the shape memory alloy can change its length according to the change of temperature. The drive circuit, the temperature-changing device, and the switching switch form a circuit, and the refrigeration or heating condition of the temperature-changing device can be changed by changing the state of the switching switch. The control component further includes a temperature sensor disposed on the telescopic member. The temperature sensor can detect the temperature of the telescopic member, and there is a one-to-one correspondence between the length of the telescopic member and its temperature. Therefore, the drive circuit can accurately adjust the length of the telescopic member according to the temperature value of the telescopic member detected by the temperature sensor.

[0117] When the switching switch is in the first state, the temperature-changing device refrigerates, and the telescopic member is directly or indirectly connected to the temperature-changing device. Thus, the drive circuit supplies power to the temperature-changing device, causing the temperature-changing device to refrigerate, and the telescopic member is affected by the temperature-changing device and elongates.

[0118] When the pressure value is less than the lower limit value of the preset pressure range, control the switching switch to be in the first state, and adjust the power output to the temperature-changing device according to the temperature value detected by the temperature sensor, so as to achieve accurate adjustment of the temperature of the telescopic member and accurate adjustment of the length of the telescopic member.

[0119] When the switching switch is in the second state, the temperature-changing device heats, and the telescopic member is directly or indirectly connected to the temperature-changing device. Thus, the drive circuit supplies power to the temperature-changing device, causing the temperature-changing device to heat, and the telescopic member is affected by the temperature-changing device and shortens.

[0120] When the pressure value is greater than the upper limit value of the preset pressure range, control the switching switch to be in the second state, and adjust the power output to the temperature-changing device according to the temperature value detected by the temperature sensor, so as to achieve accurate adjustment of the temperature of the telescopic member and accurate adjustment of the length of the telescopic member.

[0121] Alternatively, when the switching switch is in the second state, the telescopic member and the driving circuit are directly or indirectly connected, so that the driving circuit supplies power to the telescopic member. Affected by the resistance of the telescopic member itself, the telescopic member heats up, realizing the shortening of the telescopic member.

[0122] Or when the pressure value is greater than the upper limit value of the preset pressure range, control the switching switch to be in the second state, and adjust the current output to the telescopic member according to the temperature value detected by the temperature sensor, so as to realize high-precision adjustment of the temperature of the telescopic member and high-precision adjustment of the length of the telescopic member.

[0123] As described above, the length of the telescopic member is adjusted to the required length to ensure that the pressure between the wearable device and the user's skin conforms to the preset pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor and enhancing the accuracy and reliability of the wearable device for monitoring the user's physiological parameters. Moreover, the electro-deformable material has high reliability and fast response speed.

[0124] The embodiment of the present application provides a control method for a wearable device, which is executed by the wearable device provided in the embodiment of the first aspect. Figure 12 Fig. 2 shows the second flowchart of the control method of the wearable device according to the embodiment of the present application.

[0125] As Figure 12 shown, the control method of the wearable device includes:

[0126] Step 1202: Determine whether the PPG sensor detects that the wearable device is worn. If the determination result is yes, execute step 1204; if the determination result is no, end the process.

[0127] Step 1204: Obtain the pressure value Pt between the detection component and the user's skin detected by the pressure sensor.

[0128] Step 1206: Determine whether the pressure value Pt is within the preset pressure range. If the determination result is yes, end the process; if the determination result is no, execute step 1208.

[0129] Step 1208: Determine whether the pressure value Pt is less than the lower limit value of the preset pressure range. If the determination result is yes, execute step 1210; if the determination result is no, execute step 1212.

[0130] Step 1210: The control component outputs an electric field with the same polarization direction to the telescopic member.

[0131] Step 1212: The control component outputs an electric field with the opposite polarization direction to the telescopic member.

[0132] Step 1214: Determine whether the pressure value Pt is within a preset pressure range. If the determination result is yes, end the process; if the determination result is no, execute step 1206.

[0133] For the control method of the wearable device provided in the embodiments of the present application, the execution subject may be the control device of the wearable device. In the embodiments of the present application, taking the control device of the wearable device executing the control method of the wearable device as an example, the control device of the wearable device provided in the embodiments of the present application is described.

[0134] As Figure 13 shown, the present application provides a control device 1300 for a wearable device, which is used for the wearable device provided in the embodiments of the first aspect. The device includes: an acquisition module 1302, configured to acquire the pressure value detected by the pressure sensor when the user wears the wearable device; a determination module 1304, configured to determine the relationship between the pressure value and the preset pressure range; a first control module 1306, configured to control the telescopic member to shorten when the pressure value is greater than the upper limit value of the preset pressure range; a second control module 1308, configured to control the telescopic member to extend when the pressure value is less than the lower limit value of the preset pressure range.

[0135] In the embodiments of the present application, the wearable device includes a main body and a bottom shell assembly provided at the bottom of the main body. Among them, the bottom shell assembly includes a fixed part, a movable part, and a telescopic member. The fixed part is connected to the main body, and the middle positions of the movable part and the fixed part are opposite to ensure uniform pressure when the movable part contacts the human skin. The movable part includes a PPG sensor and a pressure sensor. The PPG sensor can output a PPG signal, and the pressure sensor can detect the pressure value between the movable part and the human skin.

[0136] The fixed part and the movable part are connected by a telescopic member, or the main body and the movable part are connected by a telescopic member. Furthermore, the telescopic member can drive the movable part away from the main body, and the telescopic member can also drive the movable part closer to the main body. Furthermore, when the user wears the wearable device, the pressure value detected by the pressure sensor can be adjusted by the telescopic movement of the telescopic member, that is, the pressure value between the movable part and the user. Thus, it is ensured that the pressure between the PPG sensor and the user's skin is always within a reasonable pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor and enhancing the accuracy and reliability of the wearable device for monitoring the user's physiological parameters.

[0137] After the user wears the wearable device, the pressure sensor can detect the pressure value between the wearable device and the user's skin, compare the pressure value with the preset pressure range, and control the telescopic member to extend or shorten when the pressure value is outside the preset pressure range, so that the pressure value detected by the pressure sensor is within the preset pressure range.

[0138] In practical applications, the optimal contact pressure range between the user's skin and the wearable device can be analyzed through big data, and it can be set as a preset pressure range. The wearable device dynamically adjusts the pressure value Pt between it and the user's skin to keep it always within the preset pressure range, so as to ensure the stability of the waveform of the PPG signal and the reliability of the accurate extraction of key feature points, and optimize the accuracy of measuring human physiological parameters such as blood pressure by PPG.

[0139] As a possible implementation manner, the telescopic member is made of an electro-deformable material, and the polarization direction of the telescopic member is the first direction; the first control module includes: a first control sub-module, configured to output an electric field to the telescopic member when the pressure value is greater than the upper limit value of the preset pressure range, and the direction of the electric field is the second direction, and the second direction is opposite to the first direction; the second control module includes: a second control sub-module, configured to output an electric field to the telescopic member when the pressure value is less than the lower limit value of the preset pressure range, and the direction of the electric field is the first direction.

[0140] As a possible implementation manner, it further includes: an adjustment module, configured to dynamically adjust the intensity of the electric field according to the pressure value so that the pressure value is maintained within the preset pressure range.

[0141] As a possible implementation manner, the control component includes a drive circuit, a temperature-changing device, a switching switch, and a temperature sensor, and the telescopic member is made of a shape memory alloy; the first control module includes: a third control sub-module, configured to control the switching switch to be in the second state when the pressure value is greater than the upper limit value of the preset pressure range, and adjust the power output to the temperature-changing device or the current output to the telescopic member according to the temperature value detected by the temperature sensor; the second control module includes: a fourth control sub-module, configured to control the switching switch to be in the first state when the pressure value is less than the lower limit value of the preset pressure range, and adjust the power output to the temperature-changing device according to the temperature value detected by the temperature sensor.

[0142] The control device of the wearable device in the embodiments of the present application may be a device with an operating system. The operating system may be the Android operating system, may be the iOS operating system, or may be other possible operating systems, which are not specifically limited in the embodiments of the present application.

[0143] The control device of the wearable device provided in the embodiments of the present application can implement each process implemented in the above method embodiments and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0144] The embodiments of the present application further provide a wearable device, Figure 14 showing the structural block diagram of the wearable device according to the embodiments of the present application, as Figure 14As shown, the wearable device 1400 includes a processor 1402 and a memory 1404. Programs or instructions that can run on the processor 1402 are stored on the memory 1404. When the programs or instructions are executed by the processor 1402, each step of the above method embodiment is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.

[0145] It should be noted that the wearable devices in the embodiments of the present application include the above-mentioned mobile wearable devices and non-mobile wearable devices.

[0146] Figure 15 Schematic diagram of the hardware structure of a wearable device implementing an embodiment of the present application.

[0147] The wearable device 1500 includes, but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509, a processor 1510, and other components. Among them, the sensor 1505 includes a PPG sensor, a pressure sensor, and a temperature sensor.

[0148] Those skilled in the art can understand that the wearable device 1500 may further include a power source (such as a battery) for powering each component. The power source can be logically connected to the processor 1510 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 15 The wearable device structure shown in does not constitute a limitation on the wearable device. The wearable device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which are not described herein again.

[0149] Among them, the processor 1510 is configured to obtain the pressure value detected by the pressure sensor when the user wears the wearable device;

[0150] The processor 1510 is configured to determine the relationship between the pressure value and a preset pressure range;

[0151] The processor 1510 is configured to control the telescopic member to shorten when the pressure value is greater than the upper limit value of the preset pressure range;

[0152] The processor 1510 is configured to control the telescopic member to extend when the pressure value is less than the lower limit value of the preset pressure range.

[0153] In an embodiment of the present application, optionally, the processor 1510 is configured to control the telescopic member to shorten when the pressure value is greater than the upper limit value of the preset pressure range, including:

[0154] The processor 1510 is configured to output an electric field to the telescopic member when the pressure value is greater than the upper limit value of the preset pressure range, and the direction of the electric field is the second direction, and the second direction is opposite to the first direction;

[0155] When the pressure value is less than the lower limit value of the preset pressure range, the processor 1510 is configured to control the telescopic member to extend, including:

[0156] When the pressure value is less than the lower limit value of the preset pressure range, the processor 1510 is configured to output an electric field to the telescopic member, and the direction of the electric field is the first direction.

[0157] In an embodiment of the present application, optionally, it further includes:

[0158] The processor 1510 is configured to dynamically adjust the electric field intensity according to the pressure value so that the pressure value is maintained within the preset pressure range.

[0159] In an embodiment of the present application, optionally, when the pressure value is greater than the upper limit value of the preset pressure range, the processor 1510 is configured to control the telescopic member to shorten, including:

[0160] When the pressure value is greater than the upper limit value of the preset pressure range, the processor 1510 is configured to control the switching switch to be in the second state, and adjust the power output to the temperature-changing device or the current output to the telescopic member according to the temperature value detected by the temperature sensor;

[0161] When the pressure value is less than the lower limit value of the preset pressure range, the processor 1510 is configured to control the telescopic member to extend, including:

[0162] When the pressure value is less than the lower limit value of the preset pressure range, the processor 1510 is configured to control the switching switch to be in the first state, and adjust the power output to the temperature-changing device according to the temperature value detected by the temperature sensor.

[0163] In an embodiment of the present application, the wearable device includes a main body and a bottom shell assembly disposed at the bottom of the main body. The bottom shell assembly includes a fixed part, a movable part, and a telescopic member. The fixed part is connected to the main body, and the middle positions of the movable part and the fixed part face each other to ensure uniform pressure when the movable part contacts the human skin. The movable part includes a PPG sensor and a pressure sensor. The PPG sensor can output a PPG signal, and the pressure sensor can detect the pressure value between the movable part and the human skin.

[0164] The fixed part and the movable part are connected by a telescopic member, or the main body and the movable part are connected by a telescopic member. Furthermore, the telescopic member can drive the movable part away from the main body, and the telescopic member can also drive the movable part closer to the main body. Thus, when the user wears the wearable device, the pressure value detected by the pressure sensor can be adjusted by the expansion and contraction of the telescopic member, that is, the pressure value between the movable part and the user's body. Thereby, it is ensured that the pressure between the PPG sensor and the user's skin is always within a reasonable pressure range, thereby improving the reliability of the PPG signal output by the PPG sensor and enhancing the accuracy and reliability of the wearable device for monitoring the user's physiological parameters.

[0165] Specifically, after the user wears the wearable device, the pressure sensor can detect the pressure value between the wearable device and the user's skin, compare this pressure value with a preset pressure range, and in the case where the pressure value is outside the preset pressure range, control the telescopic member to extend or contract, so that the pressure value detected by the pressure sensor is within the preset pressure range.

[0166] In practical applications, the optimal contact pressure range between the user's skin and the wearable device analyzed through big data can be set as the preset pressure range. The wearable device dynamically adjusts the pressure value Pt between it and the user's skin to keep it always within the preset pressure range, thereby ensuring the stability of the waveform of the PPG signal and the reliability of the accurate extraction of key feature points, and optimizing the accuracy of measuring human physiological parameters such as PPG blood pressure.

[0167] It should be understood that in the embodiments of the present application, the input unit 1504 may include a graphics processor 15041 and a microphone 15042. The graphics processor 15041 processes the image files of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1507 includes at least one of a touch panel 15071 and other input devices 15072. The touch panel 15071 is also called a touch screen. The touch panel 15071 may include two parts: a touch detection device and a touch controller. The other input devices 15072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0168] The memory 1509 can be used to store software programs and various files. The memory 1509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing files. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1509 may include a volatile memory or a non-volatile memory, or the memory 1509 may include both a volatile memory and a non-volatile memory. 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), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchlink dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1509 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0169] The processor 1510 may include one or more processing units; optionally, the processor 1510 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1510 either.

[0170] The embodiments of the present application also provide a readable storage medium. A program or instructions are stored on the readable storage medium. When the program or instructions are executed by the processor, each process of the control method embodiment of the above wearable device is implemented, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[0171] Among them, the processor is the processor in the wearable device in the above-mentioned embodiment. The readable storage medium includes computer-readable storage media such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disc, etc.

[0172] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement each process of the above-mentioned embodiment of the control method of the wearable device, and can achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0173] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system-on-chip, system chip, chip system, or system-on-chip, etc.

[0174] The embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement each process of the above-mentioned embodiment of the control method of the wearable device, and can achieve the same technical effect. To avoid repetition, it will not be described in detail here. In the description of this specification, the description with reference to the terms "one embodiment" or "specific embodiment", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application.

[0175] In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0176] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A wearable device, characterized in that: include: main body; A bottom shell assembly is arranged at the bottom of the main body, the bottom shell assembly includes a fixed part, a movable part and a telescopic member, the fixed part is connected to the main body, the movable part and the middle position of the fixed part are opposite, and the movable part is movable relative to the fixed part; the telescopic member connects the fixed part and the movable part, or the telescopic member connects the main body and the movable part; the movable part includes a PPG sensor and a pressure sensor, and the telescopic member is used to drive the movable part to move away from or close to the main body; When the user wears the wearable device, the pressure value detected by the pressure sensor is adjusted by the extension and retraction of the retractable member.

2. The wearable device according to claim 1, characterized in that: The first side of the main body has a display portion, the bottom housing assembly is arranged on the second side of the main body, and the first side and the second side are two sides of the main body that are opposite to each other; Wherein, a wearing component mounting portion is provided on the main body or the fixing portion.

3. The wearable device according to claim 1, characterized in that: The fixed part has a through hole, the through hole is used to pass a wire, the movable part is located on a side of the fixed part away from the main body, and the telescopic member is fixed to a side of the fixed part facing the movable part and connected to the movable part; or The fixed part has a through hole, the movable part is arranged in the through hole, and the telescopic member is fixed to a side of the main body facing the movable part and is connected to the movable part.

4. The wearable device according to claim 3, characterized in that: The telescopic member is annular, and surrounds the through hole or is located in the through hole; or The telescopic member is columnar or sheet-shaped, and the number of the telescopic members is at least two, and the at least two telescopic members are arranged at intervals, and the telescopic member is located outside the edge of the through hole or inside the through hole.

5. The wearable device according to any one of claims 1 to 4, characterized in that: The telescopic member is made of a deformable material; Wherein, one end of the telescopic member is fixed to the main body or the fixed part, and the other end of the telescopic member is fixed to the movable part.

6. The wearable device according to claim 5, characterized in that: The telescopic member is made of an electrodeformable material. A driving circuit is provided in the main body. The driving circuit is electrically connected to the telescopic member. The driving circuit is used to transmit current to the telescopic member to extend or shorten the telescopic member.

7. The wearable device according to claim 5, characterized in that: The main body has a circuit formed by a driving circuit, a temperature-changing device and a switching switch, and the telescopic member is made of a shape memory alloy; Wherein, when the driving circuit is working, when the switching switch is in the first state, the driving circuit drives the temperature-variable device to cool, and the telescopic member is connected to the temperature-variable device to extend the telescopic member; When the switching switch is in the second state, the driving circuit drives the variable temperature device to heat, and the telescopic member is connected to the variable temperature device to shorten the telescopic member; or when the switching switch is in the second state, the telescopic member is electrically connected to the driving circuit, and the driving circuit outputs current to the telescopic member to shorten the telescopic member.

8. The wearable device according to claim 7, characterized in that: Also includes: A temperature sensor is arranged on the telescopic member, and the temperature sensor is electrically connected to the driving circuit; Wherein, the driving circuit adjusts the power output to the temperature variable device or the intensity of the current output to the telescopic member according to the temperature value detected by the temperature sensor, so as to adjust the length of the telescopic member.

9. The wearable device according to any one of claims 1 to 4, characterized in that: The bottom shell assembly also includes: The protective cover is ring-shaped, one end of the protective cover is connected to the fixed part, the other end of the protective cover is connected to the movable part, the protective cover can move following the movement of the movable part, and the telescopic part is located on the inner side of the protective cover.

10. A control method for a wearable device, characterized in that: The method is performed by the wearable device according to any one of claims 1 to 9, comprising: When the user wears the wearable device, obtaining a pressure value detected by the pressure sensor; Determining a relationship between the pressure value and a preset pressure range; When the pressure value is greater than the upper limit of the preset pressure range, controlling the telescopic member to shorten; When the pressure value is less than a lower limit of the preset pressure range, the telescopic member is controlled to extend.

11. A control device for a wearable device, characterized in that: For use in a wearable device according to any one of claims 1 to 9, the apparatus comprises: An acquisition module, used for acquiring a pressure value detected by a pressure sensor when a user wears the wearable device; A determination module, used to determine the relationship between the pressure value and a preset pressure range; A first control module, configured to control the telescopic member to shorten when the pressure value is greater than an upper limit value of the preset pressure range; The second control module is used to control the extension of the telescopic member when the pressure value is less than the lower limit of the preset pressure range.

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