Flexible pressure sensor array and preparation method thereof

Abstract

The invention belongs to the technical field of sensors, and particularly discloses a flexible pressure sensor array and a preparation method thereof. The flexible pressure sensor array comprises a plurality of first connecting pieces, a plurality of second connecting pieces, a first electrode layer, a sensing layer and a second electrode layer. The first electrode layer is provided with a first high-resistance region, a first low-resistance region and a third high-resistance region; the second electrode layer is provided with a second high-resistance region, a second low-resistance region and a fourth high-resistance region; the first connecting piece comprises a first wire and a first conductive layer; the second connecting piece comprises a second wire and a second conductive layer; and the sensing layer is a sensing fabric. The fabric of the low-resistance area on the first electrode layer and the second electrode layer can keep the original air permeability and elasticity of the conductive fabric, and the fabric of the high-resistance area is lighter and more breathable than the fabric of the low-resistance area, so that the air permeability of the first electrode layer and the second electrode layer is increased, and the whole body is lighter and more comfortable to wear.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and particularly to a flexible pressure sensor array and a preparation method thereof. Background Art

[0002] At present, in recent years, with the development of artificial intelligence, health monitoring, and human-computer interaction technologies, flexible sensors have broad application prospects, especially flexible fabric sensors made with fibers and fabrics as the substrate. Flexible textile material sensors can better fit the human body than thin-film substrate devices and simultaneously have properties such as softness and bend resistance. In the published invention patent CN103225204B, a wearable flexible fabric sensor was prepared by a coating method and an evaporation coating method. However, the interstice layer material of this device is silicone, polyurethane, flexible epoxy resin, etc., resulting in poor air permeability, poor softness, and poor stretchability of the device. Moreover, the preparation of its sensor array requires a metal mask plate, which is not conducive to the flexible design of the array structure. This process is complex and costly, and is not conducive to industrial promotion. Summary of the Invention

[0003] The object of the present invention is to provide a flexible pressure sensor array and a preparation method thereof to solve the technical problems of poor air permeability and poor softness of the sensor array device in the prior art.

[0004] To achieve the above object, the first aspect of the present invention provides a flexible pressure sensor array, which includes: a plurality of first connectors, a plurality of second connectors, a first electrode layer, a sensing layer, and a second electrode layer; the first electrode layer, the sensing layer, and the second electrode layer are arranged in sequence from top to bottom. The upper side of the first electrode layer has first high-resistance regions and first low-resistance regions arranged alternately in sequence; a third high-resistance region is laid on the lower side of the first electrode layer; the upper side of the second electrode layer has second high-resistance regions and second low-resistance regions arranged alternately in sequence; a fourth high-resistance region is laid on the lower side of the second electrode layer;

[0005] The first connector is arranged on the first low-resistance region. The first connector includes a first wire and a first conductive layer; the first wire is laid on the first low-resistance region, and the first conductive layer is laid on the first low-resistance region and covers the first wire;

[0006] The second connector is arranged on the second low-resistance region. The second connector includes a second wire and a second conductive layer; the second wire is laid on the second low-resistance region, and the second conductive layer is laid on the second low-resistance region and covers the second wire; the second conductive layer is bonded to the sensing layer;

[0007] The sensing layer is a sensing fabric, which includes a stretchable fabric and first conductive particles located on the stretchable fabric.

[0008] Preferably, the first high-resistance region, the second high-resistance region, the third high-resistance region, and the fourth high-resistance region are all high-resistance fabrics formed by laser processing, and the low-resistance region is a low-resistance fabric formed by processing the stretchable fabric and second conductive particles.

[0009] Preferably, insulating layers are provided on the surfaces of the first wire and the second wire.

[0010] Preferably, first adhesive layers are provided on the upper and lower sides of the second conductive layer, and the second conductive layer is bonded to the sensing layer and the second low-resistance region through the first adhesive layers.

[0011] Preferably, the edge of the first electrode layer is bonded to the edge of the sensing layer, and the edge of the second electrode layer is bonded to the edge of the sensing layer.

[0012] Preferably, it further includes: a second adhesive layer and a third adhesive layer; the edge of the first electrode layer is bonded to the edge of the sensing layer through the second adhesive layer, the edge of the second electrode layer is bonded to the edge of the sensing layer through the third adhesive layer, and the thicknesses of the second adhesive layer and the third adhesive layer are 0.03 mm to 0.15 mm.

[0013] Preferably, the material of the stretchable fabric of the sensing fabric is natural fiber or chemical fiber, the grammage of the natural fiber or chemical fiber is 100 g / m 2 to 220 g / m 2 , and the material of the first conductive particles is intrinsic conductive polymer material, carbon particles or carbon nanotubes.

[0014] Preferably, the number of the first wires in the first resistance region is at least one.

[0015] Preferably, the number of the second wires in the second resistance region is at least one.

[0016] The second aspect of the present invention provides a preparation method of a flexible pressure sensor array, which includes:

[0017] Processing the first electrode layer into a conductive fabric with a first high-resistance region and a first low-resistance region alternately arranged on the upper side and a third high-resistance region on the lower side;

[0018] Processing the second electrode layer into a conductive fabric with a second high-resistance region and a second low-resistance region alternately arranged on the upper side and a fourth high-resistance region on the lower side;

[0019] Place the first wire on the first low-resistance region, and lay the first conductive layer on the first low-resistance region so that the first conductive layer covers the first wire, obtaining a first electrode layer with a first connecting member;

[0020] Place the second wire on the second low-resistance region, and lay the second conductive layer on the second low-resistance region so that the second conductive layer covers the second wire, obtaining a second electrode layer with a second connecting member;

[0021] Bond the edge of the sensing layer and the edge of the first electrode layer to obtain a composite body of the sensing layer and the first electrode layer;

[0022] Bond the edge of the sensing layer and the edge of the second electrode layer, then a flexible pressure sensor array is obtained.

[0023] The flexible pressure sensor array and its preparation method provided by the present invention have the beneficial effects that: by arranging a low-resistance region and a high-resistance region in sequence on the upper side of the first electrode layer and the upper side of the second electrode layer to form a matrix sensor; while the fabric of the low-resistance region on the first electrode layer and the second electrode layer can maintain the original air permeability and elasticity of the conductive fabric, and the fabric of the high-resistance region is thinner and more breathable than the fabric of the low-resistance region, thereby increasing the air permeability of the first electrode layer and the second electrode layer, making the whole more lightweight and more comfortable for human wear; moreover, the sensing layer is prepared with a stretchable fabric, then the flexible pressure sensor array formed by the sensing layer cooperating with the first electrode layer and the second electrode layer can be stretched, has good anti-bending property, and good fitting property with the human body; compared with the flexible fabric sensor using silicone or polyurethane or flexible epoxy resin as the gap-filling layer in the prior art, in this embodiment, the sensing layer directly fills the gap without the need for a gap-filling layer, thereby better improving the air permeability and softness of the flexible sensor array and enhancing the wearing comfort.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the flexible pressure sensor array according to an embodiment of the present invention;

[0026] Figure 2 is a schematic distribution diagram of the first high-resistance region and the first low-resistance region of the first electrode layer according to an embodiment of the present invention;

[0027] Figure 3 is a schematic distribution diagram of the fourth high-resistance region of the second electrode layer according to an embodiment of the present invention;

[0028] Figure 4Schematic diagram of the connection structure between the first connecting member and the first electrode layer according to an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the connection structure between the second connecting member and the second electrode layer according to an embodiment of the present invention.

[0030] In the figure, 100 is the first connecting member; 110 is the first wire; 120 is the first conductive layer; 200 is the second connecting member; 210 is the second wire; 220 is the second conductive layer; 230 is the first adhesive layer; 300 is the first electrode layer; 310 is the first high-resistance region; 320 is the first low-resistance region; 330 is the third high-resistance region; 400 is the sensing layer; 500 is the second electrode layer; 510 is the second high-resistance region; 520 is the second low-resistance region; 530 is the fourth high-resistance region; 600 is the second adhesive layer; 700 is the third adhesive layer. Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is 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 of the present invention.

[0033] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as greater than, less than, exceeding, etc. do not include the recited number, and understandings such as above, below, within, etc. include the recited number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0035] Please refer to Figures 1 to 5, the flexible pressure sensor array provided by the embodiments of the present invention will now be described. It should be noted that the resistance of the following high-resistance regions is greater than 10,000,000 Ω, and the resistance of the following low-resistance regions is less than 1000 Ω;

[0036] As Figures 1 to 3 shown, a flexible pressure sensor array includes: a plurality of first connectors 100, a plurality of second connectors 200, a first electrode layer 300, a sensing layer 400, and a second electrode layer 500; the first electrode layer 300, the sensing layer 400, and the second electrode layer 500 are arranged in sequence from top to bottom, and the upper side of the first electrode layer 300 has first high-resistance regions 310 and first low-resistance regions 320 arranged alternately; the lower side of the first electrode layer 300 is provided with a third high-resistance region 330; the upper side of the second electrode layer 500 has second high-resistance regions 510 and second low-resistance regions 520 arranged alternately; the lower side of the second electrode layer 500 is provided with a fourth high-resistance region 530;

[0037] Referring to Figure 4 and Figure 5 , the first connector 100 is disposed on the first low-resistance region 320, and the first connector 100 includes a first wire 110 and a first conductive layer 120; the first wire 110 is laid on the first low-resistance region 320, and the first conductive layer 120 is laid on the first low-resistance region 320 and covers the first wire 110; the second connector 200 is disposed on the second low-resistance region 520, and the second connector 200 includes a second wire 210 and a second conductive layer 220; the second wire 210 is laid on the second low-resistance region 520, and the second conductive layer 220 is laid on the second low-resistance region 520 and covers the second wire 210; the second conductive layer 220 is bonded to the sensing layer 400; the sensing layer 400 is a sensing fabric, and the sensing fabric includes a stretchable fabric and first conductive particles, and the first conductive particles are located on the stretchable fabric.

[0038] Both the first electrode layer 300 and the second electrode layer 500 are conductive fabrics, and the upper sides of the first electrode layer 300 and the second electrode layer 500 both have low-resistance regions and high-resistance regions arranged alternately; it should be noted that the upper sides of the electrode layers form matrix sensors by setting low-resistance regions and high-resistance regions; and, the fabrics of the low-resistance regions on the electrode layers can maintain the original air permeability and elasticity of the conductive fabrics, and the fabrics of the high-resistance regions on the electrode layers are thinner and more breathable than the fabrics of the low-resistance regions, thereby increasing the air permeability of the first electrode layer 300 and the second electrode layer 500 and making the whole more lightweight.

[0039] The sensing layer 400 is located between the first electrode layer 300 and the second electrode layer 500. When an external pressure acts on the sensing layer 400, it will cause changes in the flexible pressure sensor array, thereby changing the capacitance value or resistance value between the electrodes, and thus converting the external pressure signal into a measurable electrical signal.

[0040] The first electrode layer 300 is connected to the acquisition module through the first connector 100, and the second electrode layer 500 is connected to the acquisition module through the second connector 200. Then the acquisition module can obtain the magnitude and distribution of the external pressure, ensuring the normal use of the flexible pressure sensor array. Among them, the first connector 100 can be connected to the acquisition module through the first wire 110. Similarly, the second connector 200 can be connected to the acquisition module through the second wire 210.

[0041] In this embodiment, a low-resistance area and a high-resistance area are sequentially arranged on the upper side surfaces of both the first electrode layer 300 and the second electrode layer 500 to form a matrix sensor; the fabric of the low-resistance area on the first electrode layer 300 and the second electrode layer 500 can maintain the original air permeability and elasticity of the conductive fabric, and the fabric of the high-resistance area is thinner and more breathable than the fabric of the low-resistance area, thereby increasing the air permeability of the first electrode layer 300 and the second electrode layer 500, making the whole more lightweight and more comfortable for human wear; moreover, the sensing layer 400 is prepared by using stretchable fabric, so the flexible pressure sensor array formed by the sensing layer 400 in cooperation with the first electrode layer 300 and the second electrode layer 500 is stretchable, has good anti-bending property, and has good fit with the human body; compared with the flexible fabric sensor using silicone or polyurethane or flexible epoxy resin as the gap filling layer in the prior art, in this embodiment, the sensing layer 400 is directly filled in the gap without the need for gap filling, so as to better improve the air permeability and softness of the flexible sensor array and enhance the wearing comfort.

[0042] In some embodiments of the present invention, the first high-resistance area 310, the second high-resistance area 510, the third high-resistance area 330, and the fourth high-resistance area 530 are all high-resistance fabrics formed by laser processing, and the low-resistance area is a low-resistance fabric formed by stretchable fabric and second conductive particles. Both the first electrode layer 300 and the second electrode layer 500 are made of stretchable fabric, and the material of the stretchable fabric is natural fiber or chemical fiber, and the gram weight is 80 g / m 2 (grams per square meter) to 200 g / m 2, the fiber thickness is 30D (Denier) to 200D, and the material of the second conductive particles is a high conductivity material such as silver, copper, gold, alloy, etc. Among them, both the first electrode layer 300 and the second electrode layer 500 can be made of conductive silver fabric as the raw material. The conductive silver fabric can form a low resistance area and a high resistance area on the upper side by using a laser etching device, or can etch and form a high resistance area on the lower side. It should be noted that the first electrode layer 300 and the second electrode layer 500 have microstructures, and the microstructures can be wavy, cylindrical, conical, etc.; in some embodiments, they can also be irregular.

[0043] In some embodiments of the present invention, insulating layers are provided on the surfaces of the first wire 110 and the second wire 210, which can prevent multiple wires from contacting and conducting with each other, avoiding short circuits or signal interference. Among them, the first wire 110 can be conducted with the first low resistance area 320 through both ends, and the second wire 210 can be conducted with the second low resistance area 520 through both ends. It can be understood that the first conductive layer 120 covers the first wire 110 to press the end of the first wire 110 against the first low resistance area 320, which can increase the contact stability between the first wire 110 and the first low resistance area 320; similarly, the second conductive layer 220 covers the second wire 210 to press the end of the second wire 210 against the second low resistance area 520, which can increase the contact stability between the second wire 210 and the second low resistance area 520; then the electrical signals of the first wire 110 and the second wire 210 can be better transmitted to the acquisition module, and the measurement is more accurate.

[0044] Among them, the first wire 110 and the second wire 210 are metal wires, and the material of the metal wires is silver, copper, gold or alloy; the material of the insulating layer is polyurethane, silicone rubber, PVC (polyvinyl chloride), flexible resin, etc., to play an insulating role.

[0045] In some embodiments of the present invention, the number of the first wires 110 in the first low resistance area 320 is at least one, that is, the number of the first wires 110 can be one or more, so as to transmit electrical signals to the acquisition module; similarly, the number of the second wires 210 in the second low resistance area 520 is at least one, that is, the number of the second wires 210 can be one or more, so as to transmit electrical signals to the acquisition module. The number of the first wire 110 and the second wire 210 can be set according to the usage requirements.

[0046] Refer to Figure 5, in some embodiments of the present invention, first adhesive layers 230 are provided on both the upper and lower sides of the second conductive layer 220, and the second conductive layer 220 is bonded to the sensing layer 400 and the second low-resistance region 520 through the first adhesive layers 230. That is, both sides of the second conductive layer 220 are used for bonding to fix the second wire 210, and can also better connect the sensing layer 400 and the second electrode layer 500 to prevent separation and ensure the structural stability and reliability. The first adhesive layer 230 can be double-sided tape or hot melt adhesive. Among them, the double-sided tape is mainly pressure-sensitive adhesive, and it is necessary to ensure good adhesion to the fabric; while the hot melt adhesive is a hot melt adhesive film such as EVA (ethylene-vinyl acetate copolymer), TPU (thermoplastic polyurethane), or PO (propylene oxide). The thickness of the first adhesive layer 230 is 0.03 mm to 0.15 mm, preferably 0.03 mm.

[0047] Referring to Figure 4 , it can be understood that adhesive layers can also be provided on both the upper and lower sides of the first conductive layer 120, so that the first conductive layer 120 can better cover the first wire 110 on the first low-resistance region 320.

[0048] Referring to Figure 1 , in some embodiments of the present invention, the edge of the first electrode layer 300 is bonded to the edge of the sensing layer 400, and the edge of the second electrode layer 500 is bonded to the edge of the sensing layer 400. That is, the first electrode layer 300, the sensing layer 400, and the second electrode layer 500 are bonded into a whole through the edges, which is convenient for manufacturing and does not affect the air permeability of the flexible pressure sensor array, making the entire flexible pressure sensor array softer, thinner, more breathable, and more comfortable.

[0049] It should be noted that both the first conductive layer 120 and the second conductive layer 220 are conductive fabrics. The conductive fabric is composed of a fabric and conductive particles, and the conductive particle material is silver, copper, gold, or an alloy. The fabric is a stretchable fabric or a non-stretchable fabric, and the material is natural fiber or chemical fiber.

[0050] Referring to Figure 1, in some embodiments of the present invention, the flexible pressure sensor array further includes: a second adhesive layer 600 and a third adhesive layer 700; the edge of the first electrode layer 300 is bonded to the edge of the sensing layer 400 through the second adhesive layer 600, and the edge of the second electrode layer 500 is bonded to the edge of the sensing layer 400 through the third adhesive layer 700. The thickness of the second adhesive layer 600 and the third adhesive layer 700 is 0.03 mm to 0.15 mm. The second adhesive layer 600 and the third adhesive layer 700 fill the gaps between the first electrode layer 300, the second electrode layer 500 and the sensing layer 400, making the connection of the flexible pressure sensor array tighter and not easily damaged. Among them, the second adhesive layer 600 and the third adhesive layer 700 can be made of double-sided tape or hot melt adhesive. Among them, the double-sided tape is mainly pressure-sensitive adhesive, and it is necessary to ensure good adhesion to the fabric; while the hot melt adhesive is a hot melt adhesive film such as EVA (ethylene-vinyl acetate copolymer), TPU (thermoplastic polyurethane), PO (propylene oxide), etc. The thickness of the second adhesive layer 600 and the third adhesive layer 700 is 0.03 mm to 0.15 mm, preferably 0.03 mm.

[0051] In some embodiments of the present invention, the material of the stretchable fabric of the sensing fabric is natural fiber or chemical fiber, and the gram weight of the natural fiber or chemical fiber is 100 g / m 2 to 220 g / m 2 , and the material of the first conductive particles is intrinsic conductive polymer material, carbon particles or carbon nanotubes, then the made sensing fabric can meet the acquisition requirements of the flexible pressure sensor array, so that the flexible pressure sensor array can detect pressure changes.

[0052] This embodiment also provides a preparation method of the above flexible pressure sensor array, which includes:

[0053] Processing the first electrode layer 300 into a conductive fabric with a first high-resistance area 310 and a first low-resistance area 320 arranged alternately on the upper side, and a third high-resistance area 330 on the lower side;

[0054] Processing the second electrode layer 500 into a conductive fabric with a second high-resistance area 510 and a second low-resistance area 520 arranged alternately on the upper side, and a fourth high-resistance area 530 on the lower side;

[0055] Placing the first wire 110 on the first low-resistance area 320, and laying the first conductive layer 120 on the first low-resistance area 320 so that the first conductive layer 120 covers the first wire 110 to obtain the first electrode layer 300 with the first connector 100;

[0056] Place the second wire 210 on the second low-resistance region 520, and lay the second conductive layer 220 on the second low-resistance region 520 so that the second conductive layer 220 covers the second wire 210, obtaining the second electrode layer 500 with the second connector 200;

[0057] Bond the edge of the sensing layer 400 and the edge of the first electrode layer 300 to obtain a composite body of the sensing layer 400 and the first electrode layer 300;

[0058] Bond the edge of the sensing layer 400 and the edge of the second electrode layer 500, then a flexible pressure sensor array is obtained.

[0059] On the upper side surfaces of the first electrode layer 300 and the second electrode layer 500 of the flexible pressure sensor array obtained from the above method, a low-resistance region and a high-resistance region are sequentially arranged to form a matrix sensor; and the fabric of the low-resistance regions on the first electrode layer 300 and the second electrode layer 500 can maintain the original air permeability and elasticity of the conductive fabric, and the fabric of the high-resistance regions is thinner and more breathable than the fabric of the low-resistance regions, thereby increasing the air permeability of the first electrode layer 300 and the second electrode layer 500, making the whole more lightweight and more comfortable for human wear; and, the sensing layer 400 is prepared by using a stretchable fabric, then the flexible pressure sensor array formed by the sensing layer 400 in cooperation with the first electrode layer 300 and the second electrode layer 500 is stretchable, has good anti-bending property, and has good conformability with the human body; compared with the flexible fabric sensor using silicone or polyurethane or flexible epoxy resin as the gap-filling layer in the prior art, in this embodiment, the sensing layer 400 is directly used to fill the gap without the need for gap-filling, so as to better improve the air permeability and softness of the flexible sensor array and enhance the wearing comfort.

[0060] The following is an example of production using a conductive silver fabric with a size of 200 mm × 80 mm as the raw material for illustration:

[0061] Example 1: Place the conductive fabric A with a size of 200 mm × 80 mm face up on the surface of the platform, and fix its four edges with adhesive tape. Use a laser etching device to etch the front side of the conductive fabric A along the width direction. The width of the first high-resistance region 310 is 1 mm, and the width of the first low-resistance region 320 is 5 mm, forming 30 first low-resistance regions 320. The lithography power is 90%, and the rate is 5000 mm / s. Place the conductive fabric A face down on the surface of the platform, fix its four edges with adhesive tape, and perform full etching along the length direction. The width of the third high-resistance region 330 is 80 mm, the lithography power is 0.2%, and the rate is 5000 mm / s, then the first electrode layer 300 with the first high-resistance region 310 and the first low-resistance region 320 alternately arranged on the upper side and the third high-resistance region 330 on the lower side can be obtained;

[0062] Place the conductive fabric B with a size of 200 mm × 80 mm face up flat on the platform surface, and fix its four peripheral edges with adhesive tape. Use a laser etching device to etch the front side of the conductive fabric B along the length direction. The width of the second high-resistance region 510 is 1 mm, and the width of the second low-resistance region 520 is 5 mm, forming 10 second low-resistance regions 520. The lithography power is 90%, and the rate is 5000 mm / s. Turn the conductive fabric B face down and place it on the platform surface, fix its four peripheral edges with adhesive tape, and perform full etching along the length direction. The width of the fourth high-resistance region 530 is 80 mm, the lithography power is 0.2%, and the rate is 5000 mm / s. Then, a second electrode layer 500 with alternately arranged second high-resistance regions 510 and second low-resistance regions 520 on the upper side and a fourth high-resistance region 530 on the lower side can be obtained.

[0063] Place the first metal copper wire as the first wire 110 at the end of the first low-resistance region 320 of the first electrode layer 300, and cover it with a double-sided adhesive-coated first conductive layer 120. According to this step, fix 29 first wires 110 in sequence at the ends of the second to the 30th first low-resistance regions 320 to obtain the first electrode layer 300 with the first connector 100.

[0064] Place the first metal copper wire as the second wire 210 at the end of the first second low-resistance region 520 of the second electrode layer 500, and cover it with a double-sided adhesive-coated second conductive layer 220. According to this step, fix 9 second wires 210 in sequence at the ends of the second to the 10th second low-resistance regions 520 to obtain the second electrode layer 500 with the second connector 200.

[0065] Bond the edge of the first electrode layer 300 and the sensing layer 400 with hot melt adhesive to obtain a composite of the first electrode layer 300 and the sensing layer 400. Subsequently, bond the edge of the composite of the sensing layer 400 and the first electrode layer 300 from top to bottom with the edge of the second electrode layer 500. Finally, a wearable flexible pressure sensor array is obtained. The wearable flexible pressure sensor array is connected to the acquisition module through the first connector 100 and the second connector 200, and the magnitude and distribution of the external pressure can be obtained.

[0066] Example 2: Place the conductive fabric A with a size of 200 mm × 80 mm face up flat on the platform surface, and fix its four edges with adhesive tape. Use a laser etching device to etch the front of the conductive fabric A along the width direction. The width of the first high-resistance region 310 is 3 mm, and the width of the first low-resistance region 320 is 4 mm, forming 26 first low-resistance regions 320. The lithography power is 90%, and the rate is 5000 mm / s. Turn the conductive fabric A face down and place it on the platform surface, fix its four edges with adhesive tape, and perform full etching along the length direction. The width of the third high-resistance region 330 is 80 mm, the lithography power is 0.1%, and the rate is 5000 mm / s, then the first electrode layer 300 with the first high-resistance regions 310 and the first low-resistance regions 320 alternately arranged on the upper side and the third high-resistance region 330 on the lower side can be obtained;

[0067] Place the conductive fabric B with a size of 200 mm × 80 mm face up flat on the platform surface, and fix its four edges with adhesive tape. Use a laser etching device to etch the front of the conductive fabric B along the length direction. The width of the second high-resistance region 510 is 2 mm, and the width of the second low-resistance region 520 is 3 mm, forming 12 second low-resistance regions 520. The lithography power is 90%, and the rate is 5000 mm / s. Turn the conductive fabric B face down and place it on the platform surface, fix its four edges with adhesive tape, and perform full etching along the length direction. The width of the fourth high-resistance region 530 is 80 mm, the lithography power is 0.1%, and the rate is 5000 mm / s, then the second electrode layer 500 with the second high-resistance regions 510 and the second low-resistance regions 520 alternately arranged on the upper side and the fourth high-resistance region 530 on the lower side can be obtained.

[0068] Place the first metal copper wire as the first wire 110 at the end of the first low-resistance region 320 of the first electrode layer 300, and cover it with a double-sided adhesive-coated first conductive layer 120. According to this step, fix 25 first wires 110 in sequence at the ends of the second to the 26th first low-resistance regions 320 respectively, and obtain the first electrode layer 300 with the first connector 100.

[0069] Place the first metal copper wire as the second wire 210 at the end of the first low-resistance region 520 of the second electrode layer 500, and cover it with a double-sided adhesive-coated second conductive layer 220. According to this step, fix 11 second wires 210 in sequence at the ends of the second to the 12th second low-resistance regions 520 respectively, and obtain the second electrode layer 500 with the second connector 200.

[0070] The edge of the first electrode layer 300 and the sensing layer 400 are bonded with hot melt adhesive to obtain a composite of the first electrode layer 300 and the sensing layer 400. Subsequently, the edge of the composite of the sensing layer 400 and the first electrode layer 300 is bonded from top to bottom with the edge of the second electrode layer 500, and finally a wearable flexible pressure sensor array is obtained. The wearable flexible pressure sensor array is connected to the acquisition module through the first connector 100 and the second connector 200, and the magnitude and distribution of the external pressure can be obtained.

[0071] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A flexible pressure sensor array, characterized in that, Comprising: A plurality of first connectors, a plurality of second connectors, a first electrode layer, a sensing layer, and a second electrode layer; the first electrode layer, the sensing layer, and the second electrode layer are arranged in sequence from top to bottom. The upper side surface of the first electrode layer has first high-resistance regions and first low-resistance regions arranged alternately in sequence; a third high-resistance region is laid on the lower side surface of the first electrode layer; the upper side surface of the second electrode layer has second high-resistance regions and second low-resistance regions arranged alternately in sequence; a fourth high-resistance region is laid on the lower side surface of the second electrode layer; The first connector is arranged on the first low-resistance region. The first connector includes a first wire and a first conductive layer; the first wire is laid on the first low-resistance region, and the first conductive layer is laid on the first low-resistance region and covers the first wire; The second connector is arranged on the second low-resistance region. The second connector includes a second wire and a second conductive layer; the second wire is laid on the second low-resistance region, and the second conductive layer is laid on the second low-resistance region and covers the second wire; the second conductive layer is adhered to the sensing layer; The sensing layer is a sensing fabric, and the sensing fabric includes a stretchable fabric and first conductive particles, and the first conductive particles are located on the stretchable fabric.

2. The flexible pressure sensor array according to claim 1, wherein The first high-resistance region, the second high-resistance region, the third high-resistance region, and the fourth high-resistance region are all high-resistance fabrics formed by laser processing, and the low-resistance region is a low-resistance fabric formed by processing a stretchable fabric and second conductive particles.

3. The flexible pressure sensor array according to claim 1, wherein Insulating layers are provided on the surfaces of the first wire and the second wire.

4. The flexible pressure sensor array according to claim 1, wherein First adhesive layers are provided on both the upper side surface and the lower side surface of the second conductive layer, and the second conductive layer is adhered to the sensing layer and the second low-resistance region through the first adhesive layers.

5. The flexible pressure sensor array according to claim 1, wherein The edge of the first electrode layer is adhered to the edge of the sensing layer, and the edge of the second electrode layer is adhered to the edge of the sensing layer.

6. The flexible pressure sensor array according to claim 5, wherein, Also comprising: A second adhesive layer and a third adhesive layer; the edge of the first electrode layer is adhered to the edge of the sensing layer through the second adhesive layer, and the edge of the second electrode layer is adhered to the edge of the sensing layer through the third adhesive layer. The thicknesses of the second adhesive layer and the third adhesive layer are 0.03 mm to 0.15 mm.

7. The flexible pressure sensor array according to claim 1, characterized in that, The material of the stretchable fabric of the sensing fabric is natural fiber or chemical fiber, and the gram weight of the natural fiber or chemical fiber is 100 g / m 2 to 220 g / m 2 , and the material of the first conductive particles is intrinsic conductive polymer material, carbon particles or carbon nanotubes.

8. The flexible pressure sensor array according to claim 1, wherein The number of the first wires in the first resistance region is at least one.

9. The flexible pressure sensor array according to claim 1, wherein The number of the second wires in the second resistance region is at least one.

10. A method for preparing a flexible pressure sensor array according to any one of claims 1-9, characterized in that, Comprising: Processing the first electrode layer into a conductive fabric with first high-resistance regions and first low-resistance regions arranged alternately on the upper side surface and a third high-resistance region on the lower side surface; Processing the second electrode layer into a conductive fabric with second high-resistance regions and second low-resistance regions arranged alternately on the upper side surface and a fourth high-resistance region on the lower side surface; Placing the first wire on the first low-resistance region and laying the first conductive layer on the first low-resistance region so that the first conductive layer covers the first wire to obtain a first electrode layer with a first connector; Place the second wire on the second low-resistance region, and lay the second conductive layer on the second low-resistance region so that the second conductive layer covers the second wire, obtaining a second electrode layer with a second connection member; Bond the edge of the sensing layer to the edge of the first electrode layer to obtain a composite of the sensing layer and the first electrode layer; Bond the edge of the sensing layer to the edge of the second electrode layer, then a flexible pressure sensor array is obtained.

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