Flexible pressure sensor and electronic product

Abstract

The utility model relates to sensor technical field discloses a kind of flexible pressure sensor and electronic product, including first electrode layer, second electrode layer, pressure sensing layer and control mainboard, first electrode layer, pressure sensing layer and second electrode layer are sequentially laminated settings;First electrode layer includes first base body and multiple first electrode spaced apart in first base body, second electrode layer includes second base body and multiple second electrode spaced apart in second base body, and the extension direction of second electrode and the extension direction of first electrode cross;First electrode and second electrode are respectively connected the two sides of pressure sensing layer, and with pressure sensing layer and control mainboard electric connection;Pressure sensing layer is used to generate electric signal, first electrode and second electrode are used to transmit electric signal, control mainboard is used to receive electric signal;Wherein, the material of first base body, second base body and pressure sensing layer is cloth.The utility model aims at solving the technical problem that flexible pressure sensor is poor in softness, not bending-resistant, and prone to generate larger noise.

Description

[0001] This application is a divisional application of Chinese patent application No. 202520462285.4, filed on March 14, 2025, entitled "Flexible Pressure Sensor". Technical Field

[0002] This utility model relates to the field of sensor technology, and in particular to a flexible pressure sensor. Background Technology

[0003] Flexible pressure sensors are flexible electronic components that can sense the magnitude of pressure applied to their surface. They are widely used in electronic products such as medical beds, robotic vacuum cleaners, and electronic drums. By sensing the magnitude of external pressing, impact, or striking force, the collected pressure data can be used for secondary development of electronic products. They can also be used in robotic arms or industrial robots and their end effectors, as well as in intelligent sports equipment such as mobile robots, legged robots, crash barriers, musical instrument pedals, smart boxing gloves, and human-sized smart punching targets.

[0004] In related technologies, flexible pressure sensors are applied to beds for real-time monitoring of human physiological indicators, optimization of sleep quality, and prevention of pressure sores. However, due to their poor flexibility and inability to withstand bending, these sensors generate significant noise when subjected to external force, and repeated bending can lead to wire breakage or cross-contamination, resulting in a poor user experience. Utility Model Content

[0005] The purpose of this invention is to provide a flexible pressure sensor to solve the technical problems of poor flexibility, poor bending resistance, and easy generation of large noise in flexible pressure sensors.

[0006] To achieve the above objectives, this utility model provides a flexible pressure sensor, including a first electrode layer, a second electrode layer, a pressure-sensitive layer, and a control motherboard, wherein the first electrode layer, the pressure-sensitive layer, and the second electrode layer are stacked sequentially.

[0007] The first electrode layer includes a first substrate and a plurality of first electrodes spaced apart from each other on the first substrate; the second electrode layer includes a second substrate and a plurality of second electrodes spaced apart from each other on the second substrate; and the extending direction of the second electrodes intersects the extending direction of the first electrodes.

[0008] The first electrode and the second electrode are respectively connected to two sides of the pressure-sensitive layer and electrically connected to the pressure-sensitive layer and the control motherboard; the pressure-sensitive layer is used to generate electrical signals, the first electrode and the second electrode are used to transmit the electrical signals, and the control motherboard is used to receive the electrical signals;

[0009] The first substrate, the second substrate, and the pressure-sensitive layer are all made of fabric.

[0010] Optionally, the first electrode and the first substrate are integrally formed, and the second electrode and the second substrate are integrally formed.

[0011] Optionally, the first electrode is interposed in the first substrate, and the second electrode is interposed in the second substrate.

[0012] Optionally, the flexible pressure sensor further includes a lead-out layer, through which the first electrode and the control motherboard, as well as the second electrode and the control motherboard, are electrically connected. The lead-out layer can deform under external force.

[0013] Optionally, the outgoing layer includes a third substrate and a plurality of conductive wires spaced apart on the third substrate, the conductive wires being interlaced in the third substrate;

[0014] The first electrode and the control motherboard, as well as the second electrode and the control motherboard, are electrically connected via the conductive wire.

[0015] The material of the third substrate is fabric.

[0016] Optionally, the flexible pressure sensor further includes conductive foam, wherein the first electrode and the conductive wire are fixed and electrically connected through the conductive foam; and / or, the second electrode and the conductive wire are fixed and electrically connected through the conductive foam.

[0017] Optionally, the flexible pressure sensor further includes a reinforcing connecting piece, which is fixedly connected to the side of the lead-out layer facing away from the conductive foam. The reinforcing connecting piece is used to strengthen the connection strength between the conductive foam and the conductive wire.

[0018] Optionally, conductive wires are interspersed on the first substrate and the second substrate;

[0019] The first electrode and the control motherboard, as well as the second electrode and the control motherboard, are electrically connected via the conductive wire.

[0020] Optionally, the flexible pressure sensor further includes a first insulating layer and a second insulating layer, wherein the first insulating layer is attached to the side of the first electrode layer opposite to the pressure-sensitive layer, and the second insulating layer is attached to the side of the second electrode layer opposite to the pressure-sensitive layer.

[0021] The first and second insulating layers are made of fabric.

[0022] Optionally, the flexible pressure sensor further includes a data cable, one end of which is connected to the control motherboard, and the other end of which is connected to a plug-in port.

[0023] This utility model provides a flexible pressure sensor, which has the following advantages:

[0024] The flexible pressure sensor of this invention includes a first electrode layer, a second electrode layer, a pressure-sensitive layer, and a control motherboard, wherein the first electrode layer, the pressure-sensitive layer, and the second electrode layer are stacked sequentially.

[0025] The first and second substrates are made of soft fabric, with the first and second electrodes respectively placed on the fabric as substrates, thus forming a first electrode layer and a second electrode layer. The pressure-sensitive layer is a fabric structure woven from carbon fiber or other high-resistance conductive materials. The first and second electrode layers are respectively attached to the front and back of the pressure-sensitive layer. Utilizing the softness and bending resistance of the fabric, the flexibility and bending resistance of the flexible pressure sensor are improved, making it less prone to noise when applied to a bed. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the flexible pressure sensor provided in an embodiment of the present invention;

[0028] Figure 2 An exploded view of the flexible pressure sensor provided in this embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the first electrode layer provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the second electrode layer provided in an embodiment of the present invention;

[0031] Figure 5 Another exploded view of the flexible pressure sensor provided in this embodiment of the utility model;

[0032] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0033] Figure 7 for Figure 5A magnified view of a portion of point B in the middle.

[0034] The markings in the image are as follows:

[0035] 10. First electrode layer; 11. First substrate; 12. First electrode; 20. Second electrode layer; 21. Second substrate; 22. Second electrode; 30. Pressure-sensitive layer; 40. Control motherboard; 50. Outgoing cable layer; 60. Conductive foam; 70. Reinforcing connecting piece; 81. First insulating layer; 82. Second insulating layer; 90. Protective layer; 100. Flexible pressure sensor; 101. Data cable; 102. Plug-in port; X, first direction; Y, second direction. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0037] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer" and other terms used in this utility model to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device and components referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0039] like Figures 1 to 4As shown, this embodiment of the present invention provides a flexible pressure sensor 100 including a first electrode layer 10, a second electrode layer 20, a pressure-sensitive layer 30, and a control motherboard 40. The first electrode layer 10, the pressure-sensitive layer 30, and the second electrode layer 20 are stacked sequentially. The first electrode layer 10 includes a first substrate 11 and a plurality of first electrodes 12 spaced apart from each other on the first substrate 11. The second electrode layer 20 includes a second substrate 21 and a plurality of second electrodes 22 spaced apart from each other on the second substrate 21, and the extension direction of the second electrodes 22 intersects the extension direction of the first electrodes 12. The first electrodes 12 and the second electrodes 22 are respectively connected to two sides of the pressure-sensitive layer 30 and electrically connected to the pressure-sensitive layer 30 and the control motherboard 40. The pressure-sensitive layer 30 is used to generate electrical signals, the first electrodes 12 and the second electrodes 22 are used to transmit electrical signals, and the control motherboard 40 is used to receive electrical signals. The first substrate 11, the second substrate 21, and the pressure-sensitive layer 30 are made of fabric.

[0040] Based on the above technical solution, the first substrate 11 and the second substrate 21 are made of soft fabric, and the first electrode 12 and the second electrode 22 are respectively set on the fabric as a base, thereby forming the first electrode layer 10 and the second electrode layer 20. The pressure-sensitive layer 30 is a fabric structure woven from carbon fiber or other high-resistance conductive materials. In this embodiment, the first electrode layer 10 and the second electrode layer 20 are respectively attached to the front and back sides of the pressure-sensitive layer 30. By utilizing the softness and bending resistance of the fabric, the flexibility of the flexible pressure sensor 100 is improved, and the bending resistance of the sensor is enhanced. After the sensor is squeezed, deformed, and bent, it is not easy for wires to break or short circuit. When the flexible pressure sensor 100 is applied to a bed, the user directly contacts the fabric, which is less likely to generate noise.

[0041] In this embodiment, the extension direction of the second electrode 22 intersects the extension direction of the first electrode 12. The first electrode 12 and the second electrode 22 cover most of the surface of the pressure-sensitive layer 30, increasing the intersection points between the first electrode 12 and the second electrode 22, thereby increasing the pressure-sensitive points of the pressure-sensitive layer 30 to detect pressure and improving the accuracy of pressure detection.

[0042] The first electrode 12 and the second electrode 22 are made of conductive fibers. The conductor is one or more of conductive wire, knitted yarn, conductive yarn, conductive copper foil, or conductive tape. It can be tightly bonded to the fabric substrate by weaving, coating, or weaving to improve the overall flexibility of the electrode layer. In this embodiment, the fabric can be one or more of natural fabric, chemical fabric, cotton fabric, or polyester.

[0043] For example, a flexible pressure sensor 100 is laid on the surface of a mattress. When a user's body is in contact with the mattress and applies pressure, the pressure-sensitive points of the pressure-sensitive layer 30 are deformed by external force or load. The change in the contact area between the pressure-sensitive layer 30 and the first electrode 12 and the second electrode 22 causes a change in the resistance value of the pressure-sensitive layer 30. The change in resistance value is converted into an electrical signal and transmitted to the control motherboard 40 through the first electrode 12 or the second electrode 22. The control motherboard 40 then transmits the processed electrical signal to an external terminal device.

[0044] In some embodiments, such as Figures 3 to 5 As shown, the extension direction of the second electrode 22 is perpendicular to the extension direction of the first electrode 12.

[0045] Specifically, on the same plane, the flexible pressure sensor 100 has a first direction X and a second direction Y that are perpendicular to each other. A plurality of first electrodes 12 extend along the first direction X and are spaced apart on the first substrate 11, and second electrodes 22 extend along the second direction Y and are spaced apart on the second substrate 21.

[0046] For example, the first electrode layer 10, the second electrode layer 20, and the pressure-sensitive layer 30 are rectangular, so that the flexible pressure sensor 100 forms a rectangular fabric structure, with their length direction being the second direction Y and their width direction being the first direction X. Of course, the flexible pressure sensor 100 is not limited to a rectangular shape, and can also be other shapes, depending on the specific design of the application scenario.

[0047] In some embodiments, the first electrode 12 and the first substrate 11 are integrally formed, and the second electrode 22 and the second substrate 21 are integrally formed.

[0048] Specifically, the first electrode 12 and the second electrode 22 are conductive fibers. The first electrode 12 is formed on the first substrate 11 by a textile process, and the second electrode 22 is formed on the second substrate 21 by a textile process, so as to form a conductive fabric of cloth material. The conductive fabric can deform under the action of external force and be folded or bent.

[0049] In some embodiments, the first electrode 12 is interposed in the first substrate 11, and the second electrode 22 is interposed in the second substrate 21.

[0050] Specifically, the first electrode 12 is inserted into the first substrate 11 by embroidery or knitting to form a first electrode layer 10 of fabric material, and the second electrode 22 is inserted into the second substrate 21 by embroidery or knitting to form a second electrode layer 20 of fabric material.

[0051] In this embodiment, embroidery or knitting can be done by machine or by hand. The process is relatively simple and can reduce manufacturing costs.

[0052] In some embodiments, such as Figures 3 to 5 As shown, the flexible pressure sensor 100 also includes a wiring layer 50. The first electrode 12 and the control motherboard 40, as well as the second electrode 22 and the control motherboard 40, are electrically connected through the wiring layer 50. The wiring layer 50 can deform under external force.

[0053] In practical applications, a first electrode 12 is disposed on the side of the first substrate 11 facing the pressure-sensitive layer 30, and a second electrode 22 is disposed on the side of the second substrate 21 facing the pressure-sensitive layer 30. In order to make the first electrode 12 and the second electrode 22 cover most of the surface of the pressure-sensitive layer 30, the area of ​​the first electrode layer 10 and the second electrode layer 20 is usually designed to be larger than the area of ​​the pressure-sensitive layer 30.

[0054] In this embodiment, in the first direction X, the portion of the first substrate 11 larger than the edge of the pressure-sensitive layer 30 is folded towards the side opposite to the pressure-sensitive layer 30 and connected and fixed to the side of the first substrate 11 opposite to the pressure-sensitive layer 30 by a sewing thread. The first electrode 12 of the folded portion is electrically connected to the output layer 50, and the first electrode 12 transmits electrical signals from the output layer 50 to the control main board 40. In the second direction Y, the portion of the second substrate 21 larger than the edge of the pressure-sensitive layer 30 is folded towards the side opposite to the pressure-sensitive layer 30 and connected and fixed to the side of the second substrate 21 opposite to the pressure-sensitive layer 30 by a sewing thread. The second electrode 22 of the folded portion is electrically connected to the output layer 50, and the second electrode 22 transmits electrical signals from the output layer 50 to the control main board 40.

[0055] In the above embodiment, by folding over portions of the first electrode layer 10 and the second electrode layer 20, the projected areas of the first electrode layer 10 and the second electrode layer 20 on the pressure-sensitive layer 30 are equal to or slightly larger than the area of ​​the pressure-sensitive layer 30, thus aligning the overall fabric edges of the flexible pressure sensor 100. Since the lead-out layer 50 can deform under external force and possesses a certain degree of flexibility, the softness of the flexible pressure sensor 100 remains unaffected.

[0056] In some embodiments, the outgoing layer 50 includes a third substrate and a plurality of conductive wires (not shown in the figures) spaced apart from each other on the third substrate. The conductive wires are interlaced in the third substrate. The first electrode 12 and the control main board 40 are electrically connected through the conductive wires, as are the second electrode 22 and the control main board 40. The third substrate is made of fabric.

[0057] Specifically, the third substrate uses fabric as a base, and conductive wires are interlaced on the third substrate by embroidery or knitting to form a fabric wire layer 50, which improves the flexibility of the flexible pressure sensor 100 and reduces noise during use.

[0058] The conductive wire can be a metal wire, such as copper or silver wire, possessing both electrical conductivity and tensile strength. Embedded on a third substrate, the conductive wire can deform with the substrate while maintaining its electrical conductivity.

[0059] In this embodiment, a plurality of spaced conductive wires are disposed on the third substrate, and each conductive wire is connected to each first electrode 12 (or second electrode 22) in a one-to-one correspondence. Specifically, in the lead-out layer 50 connected to the first electrode 12, the conductive wires extend along the first direction X and are connected to the first electrode 12 in a one-to-one correspondence; in the lead-out layer 50 connected to the second electrode 22, the conductive wires extend along the second direction Y and are connected to the second electrode 22 in a one-to-one correspondence.

[0060] In some embodiments, such as Figure 5 As shown, the flexible pressure sensor 100 also includes a protective layer 90, and the protective layer 90 is attached to the side of the wire output layer 50 facing away from the first electrode 12 or the side of the wire output layer 50 facing away from the second electrode 22.

[0061] Specifically, after folding the first electrode layer 10 and the second electrode layer 20, to prevent direct contact between human skin and the first electrode 12 or the second electrode 22, a protective layer 90 is connected to the folded surfaces of the first electrode layer 10 and the second electrode layer 20 by sewing thread. The protective layer 90 is made of fabric. The protective layer 90 can cover the folded portion of the first electrode 12 or the second electrode 22.

[0062] In some embodiments, such as Figures 5 to 7 As shown, the flexible pressure sensor 100 also includes conductive foam 60. The first electrode 12 is fixed and electrically connected to the conductive wire through the conductive foam 60; the second electrode 22 is fixed and electrically connected to the conductive wire through the conductive foam 60.

[0063] Specifically, the conductive foam 60 is a conductive cloth wrapped around a flame-retardant sponge, or a foam material with conductive properties composed of a foam substrate and conductive particles or a coating. Because the conductive filaments have small diameters and thin thicknesses, their contact with the first electrode 12 and the second electrode 22 is unstable. In this embodiment, the conductive filaments and the first electrode 12 are respectively fixedly connected to the conductive foam 60 using sewing thread, so that the first electrode 12 is electrically connected to the conductive filaments. For the same purpose, the second electrode 22 and the conductive filaments are respectively fixedly connected to the conductive foam 60 using sewing thread, so that the first electrode 12 is electrically connected to the conductive filaments.

[0064] In this embodiment, conductive foam 60 is fixedly connected to the first electrode 12 and the second electrode 22, which indirectly increases the contact area between the conductive wire and the first electrode 12 and the second electrode 22, making the contact between the first electrode 12 or the second electrode 22 and the conductive wire more stable and the connection stable and reliable.

[0065] In other embodiments, the conductive foam 60 can be replaced with conductive adhesive, conductive rubber block or conductive fabric, as long as it has conductive properties and softness.

[0066] In some embodiments, such as Figure 5 As shown, the flexible pressure sensor 100 also includes a reinforcing connecting piece 70, which is fixedly connected to the side of the lead-out layer 50 facing away from the conductive foam 60, and is used to strengthen the connection strength between the conductive foam 60 and the conductive wire.

[0067] Specifically, the structural strength of the reinforcing connecting piece 70 is greater than that of the conductive foam 60. The reinforcing connecting piece 70 is fixedly connected to the side of the lead-out layer 50 away from the conductive foam 60, thereby strengthening the connection between the conductive foam 60 and the conductive wire and the electrode, improving the contact stability between the first electrode 12 or the second electrode 22 and the conductive wire, and preventing the conductive wire from breaking.

[0068] In some embodiments, the reinforcing connecting piece 70 is a PET film, which is a film material made from polyethylene terephthalate. The thickness of the reinforcing connecting piece 70 is 0.1-0.2 mm. Within this thickness range, it can enhance the connection strength between the conductive foam 60 and the conductive wire without significantly increasing the overall thickness of the flexible pressure sensor 100.

[0069] For example, the thickness of the reinforcing connecting piece 70 is 0.125 mm.

[0070] In some embodiments, the first electrode 12 is inserted into the first substrate 11, and the second electrode 22 is inserted into the second substrate 21; conductive wires are inserted into the first substrate 11 and the second substrate 21; the first electrode 12 and the control main board 40 and the second electrode 22 and the control main board 40 are electrically connected by conductive wires (not shown in the figures).

[0071] In this embodiment, the first substrate 11 is based on fabric, and the first electrode 12 and conductive wires are interwoven and disposed on the first substrate 11 by embroidery or knitting. There is no need to set a separate lead-out layer 50. It is equivalent to directly molding the lead-out layer 50 and the first electrode layer 10 onto the fabric. Similarly, the second substrate 21 is based on fabric, and the second electrode 22 and conductive wires are interwoven and disposed on the second substrate 21 by embroidery or knitting. There is no need to set a lead-out layer 50. The lead-out layer 50 and the second electrode layer 20 are directly molded onto the fabric, thereby forming a flexible pressure sensor 100 made of fabric material, improving the flexibility of the sensor.

[0072] In some embodiments, such as Figure 1 and Figure 2As shown, the flexible pressure sensor 100 also includes a first insulating layer 81 and a second insulating layer 82. The first insulating layer 81 is attached to the side of the first electrode layer 10 away from the pressure-sensitive layer 30, and the second insulating layer 82 is attached to the side of the second electrode layer 20 away from the pressure-sensitive layer 30. The first insulating layer 81 and the second insulating layer 82 are made of fabric.

[0073] Specifically, the first insulating layer 81 can be fixed to the side of the first electrode layer 10 away from the pressure-sensitive layer 30 by sewing thread, and the second insulating layer 82 can be fixed to the side of the second electrode layer 20 away from the pressure-sensitive layer 30 by sewing thread. The first insulating layer 81 and the second insulating layer 82 provide protection for the first electrode layer 10 and the second electrode layer 20 respectively, preventing the first electrode layer 10 and the second electrode layer 20 from being exposed to the external environment, reducing electrode damage caused by friction, scratching or other factors, and extending the service life of the flexible pressure sensor 100.

[0074] In this embodiment, the first insulating layer 81 and the second insulating layer 82 are made of fabric, which has a certain degree of flexibility. When subjected to external force, they can better adapt to deformation and increase user comfort, reduce friction and discomfort between the flexible pressure sensor 100 and the skin, and improve the user experience.

[0075] In some embodiments, such as Figure 1 and Figure 2 As shown, the flexible pressure sensor 100 also includes a data cable 101, one end of which is connected to the control motherboard 40, and the other end of which is connected to a plug-in port 102.

[0076] Specifically, the data cable 101 is used to transmit the electrical signals received by the control motherboard 40 to external devices in real time and quickly through the plug-in port 102, so as to facilitate the monitoring and analysis of pressure changes. The plug-in port 102 can connect to various types of external devices, such as computers, data acquisition devices, and displays, enhancing the system's scalability and enabling the flexible pressure sensor 100 to be suitable for different application scenarios and needs.

[0077] It should be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0078] The sequence numbers of the above-described embodiments of this utility model are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A flexible pressure sensor, characterized by, It includes a first electrode layer, a second electrode layer, a pressure-sensitive layer, and an output layer, wherein the first electrode layer, the pressure-sensitive layer, and the second electrode layer are stacked sequentially. The first electrode layer includes a first substrate and a plurality of first electrodes spaced apart from each other on the first substrate; the second electrode layer includes a second substrate and a plurality of second electrodes spaced apart from each other on the second substrate; and the extending direction of the second electrodes intersects the extending direction of the first electrodes. The first electrode and the second electrode are respectively connected to two sides of the pressure-sensitive layer; The outgoing layer includes a third substrate and a plurality of conductive wires spaced apart from each other on the third substrate. The first electrode and the control motherboard or the second electrode and the control motherboard are electrically connected through the conductive wires. The first substrate, the second substrate, the third substrate, and the pressure-sensitive layer are made of fabric. The first electrode is embroidered or knitted onto the first substrate, the second electrode is embroidered or knitted onto the second substrate, and the conductive wire is embroidered or knitted onto the third substrate.

2. The flexible pressure sensor of claim 1, wherein, The flexible pressure sensor further includes conductive foam, wherein the first electrode and the conductive wire are fixed and electrically connected through the conductive foam; and / or, the second electrode and the conductive wire are fixed and electrically connected through the conductive foam.

3. The flexible pressure sensor of claim 2, wherein, The conductive foam comprises a flame-retardant sponge and a conductive cloth, wherein the conductive cloth covers the flame-retardant sponge; or... The conductive foam comprises a foam substrate and conductive particles; or... The conductive foam includes a foam substrate and a conductive coating, wherein the conductive coating covers the foam substrate.

4. The flexible pressure sensor of claim 2, wherein, The first electrode, the second electrode, or the conductive wire are fixedly connected to the conductive foam by sewing thread; or, On the conductive foam, the first electrode and the conductive wire are fixedly connected by sewing thread; or... On the conductive foam, the second electrode is fixedly connected to the conductive wire by a sewing thread.

5. The flexible pressure sensor according to claim 2, wherein the flexible pressure sensor further comprises a reinforcing connecting piece, the reinforcing connecting piece being fixedly connected to the side of the lead-out layer opposite to the conductive foam, for strengthening the connection between the conductive foam and the conductive wire.

6. The flexible pressure sensor of claim 5, wherein, The reinforcing connecting piece comprises a PET film, and the thickness of the reinforcing connecting piece is 0.1-0.2 mm.

7. The flexible pressure sensor of claim 1, wherein, At least a portion of the conductive wires of the outgoing layer are inserted into the first substrate or the second substrate, and the first electrode and the control motherboard and the second electrode and the control motherboard are electrically connected through the conductive wires.

8. The flexible pressure sensor of claim 1, wherein, In the extending direction of the first electrode, the portion of the first substrate larger than the edge of the pressure-sensitive layer is folded toward the side away from the pressure-sensitive layer and connected and fixed to the side of the first substrate away from the pressure-sensitive layer by a sewing thread. The first electrode of the folded portion is electrically connected to the output layer, and the first electrode transmits electrical signals from the output layer to the control motherboard. or, In the extending direction of the second electrode, the portion of the second substrate larger than the edge of the pressure-sensitive layer is folded towards the two sides opposite to the pressure-sensitive layer, and is connected and fixed to the two sides of the second substrate opposite to the pressure-sensitive layer by sewing thread. The folded portion of the second electrode is electrically connected to the output layer, and the second electrode transmits electrical signals from the output layer to the control motherboard.

9. The flexible pressure sensor as described in claim 1, characterized in that, The flexible pressure sensor also includes a protective layer, which is attached to the side of the lead-out layer facing away from the first electrode or the side of the lead-out layer facing away from the second electrode.

10. The flexible pressure sensor as described in claim 1, characterized in that, At least a portion of the conductive wires extend along the extension direction of the first electrode, and each conductive wire is connected to a corresponding first electrode; or, At least a portion of the conductive wires extend along the extension direction of the second electrode, and each conductive wire is connected to a corresponding second electrode.

11. The flexible pressure sensor according to claim 1, characterized in that, The flexible pressure sensor further includes a first insulating layer and a second insulating layer. The first insulating layer is attached to the side of the first electrode layer away from the pressure-sensitive layer, and the second insulating layer is attached to the side of the second electrode layer away from the pressure-sensitive layer. The first and second insulating layers are made of fabric.

12. The flexible pressure sensor according to any one of claims 1 to 11, characterized in that, The flexible pressure sensor also includes a data cable, one end of which is connected to the control motherboard, and the other end of which is connected to a plug-in port.

13. An electronic product, characterized in that, The electronic product includes a flexible pressure sensor as described in any one of claims 1 to 12, and the electronic product includes one of a medical bed, an electronic drum, a robot, a crash barrier, a musical instrument pedal, a smart boxing glove, and a smart punching bag.

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