High-density array flexible pressure sensor formed by stacking multiple layers of functional fabrics

Abstract

The invention relates to the technical field of pressure sensors, and discloses a high-density array pressure distribution sensor formed by stacking multiple layers of functional fabrics. Comprising a pressure sensor main body, and the pressure sensor main body comprises a pressure-sensitive layer which is formed by mixing carbon nanotubes and / or graphene with polymer particles and is of a micro-pyramid or porous foam microstructure; the electrode layer is of an annular buckled net structure, a channel is formed through photo-thermal ablation, the electrode layer comprises an upper electrode layer and a lower electrode layer, and the upper electrode layer and the lower electrode layer are located on the upper side and the lower side of the pressure-sensitive layer respectively; the packaging layer comprises an upper packaging layer and a lower packaging layer, the upper packaging layer and the lower packaging layer are located on the sides, away from each other, of the upper electrode layer and the lower electrode layer respectively, and the upper surface and the lower surface of the pressure-sensitive layer are tightly attached to the whole area of the upper electrode layer and the whole area of the lower electrode layer respectively. According to the technical scheme, the flexibility of the pressure sensor can be improved, and the pressure sensor has wide range and high response.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure sensors, in particular to a high-density array flexible pressure sensor with multi-layer functional fabric stacking. BACKGROUND

[0002] Traditional pressure sensors usually use rigid materials or structures, which are not flexible enough, and face challenges when detecting pressure on the human body or irregular surfaces. It is difficult to perfectly fit the detection object, and blind spots are easy to appear, which reduces the detection accuracy. At the same time, the problem of poor air permeability is also more obvious.

[0003] Flexible pressure sensors are a research and development direction in recent years. The working principle is to convert various mechanical signals (such as external pressure) into electrical signals that change with the resistance of the sensor; by applying external force, the conductive path of the sensing material is changed, thereby generating a resistance effect, causing the resistance value to change; with the help of a pre-constructed detection circuit, the resistance can be directly measured according to the change of the electrical signal, thereby detecting the change of the mechanical signal. Flexible pressure sensors have the advantages of wide detection range, easy signal acquisition, and simple experimental test equipment.

[0004] In practical applications, it is generally difficult to have both wide detection range and high sensitivity. When the detection range is wide, the sensitivity is low; otherwise, it is also the same. This greatly restricts the application of flexible sensors in the fields of artificial intelligence, human-computer interaction and motion detection.

[0005] In addition, the traditional pressure sensor structure still has defects in buffer performance: the core pressure-sensitive layer and electrode layer are mostly rigidly stacked in a composite manner, and the packaging layer is usually made of hard film materials to consider waterproofness, and the overall structure lacks effective buffer energy absorption design. When subjected to external impact, the impact force will be directly transmitted through the fabric layer to the micro-conductive network of the pressure-sensitive material, causing the polymer fiber to deform excessively, the conductive coating to fall off or the sensing unit to be disconnected, and the electrode layer is prone to cracking due to impact stress concentration, which seriously affects the structural integrity and service life of the sensor, and it is difficult to adapt to long-term stable work in high-impact scenarios. SUMMARY

[0006] The purpose of the present application is to provide a high-density array flexible pressure sensor with multi-layer functional fabric stacking, which can improve the flexibility of the pressure sensor while having a large range and high response.

[0007] To achieve the above objectives, the present invention provides a high-density array flexible pressure sensor made of multilayer functional fabric stacks, comprising a pressure sensor body, the pressure sensor body comprising: a pressure-sensitive layer, which is composed of a mixture of carbon nanotubes and / or graphene and polymer particles, and adopts a micro pyramid or porous foam microstructure; an electrode layer, which adopts an interlocking ring mesh structure and forms channels through photothermal ablation, the electrode layer comprising an upper electrode layer and a lower electrode layer, the upper electrode layer and the lower electrode layer being located on the upper and lower sides of the pressure-sensitive layer, respectively; and an encapsulation layer, which comprises an upper encapsulation layer and a lower encapsulation layer, the upper encapsulation layer and the lower encapsulation layer being located on the sides of the upper electrode layer and the lower electrode layer that are far apart from each other, the upper and lower surfaces of the pressure-sensitive layer being tightly bonded to the entire area of ​​the upper electrode layer and the lower electrode layer, respectively.

[0008] As a feasible preferred embodiment, it includes a pressure sensor body, the top of which is provided with a buffer mechanism, and the buffer mechanism is provided with a drive mechanism.

[0009] As a feasible preferred embodiment, the buffer mechanism includes two U-shaped frames symmetrically fixed to the top of the pressure sensor body. A mounting frame is provided between the tops of the two U-shaped frames. A base block is fixedly connected to the bottom of the mounting frame near the four corners, and the base block passes through the U-shaped frame. Two sliding rods are symmetrically fixedly connected to the bottom of the mounting frame. The two sliding rods are located between the two U-shaped frames. A sliding plate is movably sleeved on the outside of each of the two sliding rods. A spring is fixedly connected between each of the two sliding plates and the mounting frame. The two springs are respectively sleeved on the outside of the two sliding rods. A U-shaped round rod is fixedly connected to the top of each of the two sliding plates. The two U-shaped round rods pass through the mounting frame and are movably connected to the mounting frame. Two sleeve plates, both located above the mounting frame, are symmetrically fixedly sleeved between the two U-shaped round rods. A force-bearing plate is fixedly installed between the tops of the two sleeve plates.

[0010] As a feasible preferred embodiment, the inner sides of the two U-shaped frames are fixedly connected with sliding rods 2, and two sliding plates 2 are symmetrically and movably sleeved between the two sliding rods 2. Two insert rods are symmetrically and fixedly connected to the sides of the two sliding plates 2 that are far apart from each other. Each bottom block is provided with an insertion hole on its outer side, and each insert rod is inserted into the respective insertion hole.

[0011] As a feasible preferred embodiment, two slide rods are symmetrically and fixedly connected between the two slide rods 2, and two slide plates 1 are symmetrically and movably sleeved between the two slide rods 1. Two movable rods are symmetrically and rotatably connected to the outer side of the slide plates 2, and the ends of the two movable rods away from the slide plates 2 are respectively rotatably connected to the two slide plates 1.

[0012] As a feasible preferred embodiment, a guide post is fixedly connected to the inner side of the mounting frame, and two guide frames are symmetrically and movably sleeved on the outer side of the guide post. Two rubber blocks are symmetrically and fixedly connected to the sides of the two guide frames that are close to each other. Two sliding plates are located between the two guide frames, and rubber plates are fixedly connected to the sides of the two sliding plates that are far apart from each other.

[0013] As a feasible preferred embodiment, the outer side of the guide post is provided with a side groove, and the inner sides of the two guide frames are fixedly connected with side blocks, and the two side blocks are slidably connected to the side groove.

[0014] As a feasible preferred embodiment, the bottom of each of the two sleeve plates is rotatably connected to a movable plate, and the bottom of each movable plate is rotatably connected to the top of the two guide frames.

[0015] As a feasible preferred embodiment, the drive mechanism includes a bidirectional lead screw rotatably connected between two U-shaped frames. Two nuts are symmetrically threaded onto the outer side of the bidirectional lead screw. Two slide plates are respectively fixed to the bottom of the two nuts. A gear is fixedly installed on the outer side of the bidirectional lead screw. A U-shaped rod is fixedly connected to the outer side of one of the U-shaped frames. A translation plate is movably sleeved on the outer side of the U-shaped rod. A toothed plate is fixedly connected to the top of the translation plate, and the toothed plate meshes with the gear.

[0016] As a feasible preferred embodiment, a drive plate is fixedly connected to the bottom of the translation plate, and a handle is fixedly connected to the outside of the drive plate. The drive plate is movably sleeved on the outside of one of the slide rods.

[0017] Compared with existing technologies, the beneficial effects of the above technical solution are as follows: The pressure-sensitive layer employs a composite system of carbon nanotubes / graphene and polymer particles. Carbon nanotubes and graphene possess excellent conductivity and mechanical flexibility, enabling precise sensing of minute deformations. The micro-pyramid / porous foam microstructure further amplifies the change in contact area under pressure—when pressure is applied, the apex of the micro-pyramids or the foam pores undergo rapid extrusion deformation, drastically altering the contact path of the conductive filler and causing significant fluctuations in the resistance signal. This design can capture micro-pressure signals (down to a few Pa) such as pulse and respiration, and can also withstand larger pressures (such as limb movement compression), achieving comprehensive coverage of accurate micro-pressure identification and stable high-pressure response.

[0018] The porous / micropyramid structure of the pressure-sensitive layer has excellent elastic recovery ability, and the elastic properties of polymer particles can reduce residual deformation after deformation. At the same time, the conductive network of carbon nanotubes / graphene has a fast response speed and can capture dynamic pressure changes in real time, avoiding signal distortion caused by hysteresis in traditional sensors.

[0019] Each layer utilizes flexible materials: the polymer particles in the pressure-sensitive layer possess excellent tensile and bending properties, the interlocking ring-shaped mesh structure of the electrode layer can disperse stress during deformation (avoiding the problem of easy breakage of traditional rigid electrodes), and the encapsulation layer also needs to be adapted to flexible substrates (such as flexible films and fabrics). The overall structure can achieve large-angle bending, stretching, and even folding, and can closely conform to human skin or fabric surfaces (such as cuffs and insoles), solving the problem of rigid sensors being unsuitable for flexible scenarios.

[0020] The electrode layer is formed into channels through photothermal ablation, allowing for precise control of the electrode shape and conductive path, avoiding interference and ensuring stable conductivity. Simultaneously, the interlocking ring-shaped mesh structure increases the contact area between the electrode and the pressure-sensitive layer, reducing contact resistance. Furthermore, the mesh structure is less prone to breakage during stretching, extending the electrode's lifespan. Compared to traditional printed electrodes (which are prone to detachment and have poor conductivity stability), this solution maintains a stable electrical signal output over a long period, reducing the sensor's failure rate.

[0021] The upper and lower surfaces of the pressure-sensitive layer are tightly bonded to the entire area of ​​the upper and lower electrode layers, respectively, avoiding the "uneven pressure transmission" (such as signal blind spots caused by local non-contact) caused by gaps between layers in traditional sensors. The full-bonding design ensures that pressure can be evenly transmitted to every area of ​​the pressure-sensitive layer, generating a stable signal response regardless of where the pressure is applied to the sensor, thus improving the consistency and reliability of the sensing.

[0022] This invention, through the cooperation of components such as a U-shaped frame, mounting frame, base block, insertion hole, movable rod, sliding plate two, sliding rod two, and insertion rod, can fix the mounting frame to the top of the U-shaped frame, realizing the installation of the force-bearing plate. When the force-bearing plate is impacted, the spring sleeved on the outside of the sliding rod three will deform and absorb part of the impact force. At the same time, the sliding plate three drives the sleeve plate and the force-bearing plate downward through the U-shaped round rod one, and the movable plate drives the guide frame to slide down along the guide post. The rubber block on the guide frame collides with the rubber plate on the sliding plate one, limiting the sliding plate one and preventing the insertion rod from dislodging from the insertion hole, further ensuring the stability of the mounting frame. Through the combined action of the spring, rubber block, and rubber plate elasticity, the impact force is effectively buffered, improving the impact resistance of the pressure sensor body and preventing its damage.

[0023] In the drive mechanism, the drive plate is moved along the slide bar by the handle, and the drive plate moves the translation plate. The toothed plate on the translation plate meshes with the gear, causing the bidirectional lead screw to rotate. The lead screw nut on the outside of the bidirectional lead screw drives the slide plate to slide along the slide bar, thereby allowing the insertion rod to be inserted into or removed from the insertion hole of the bottom block. This makes it easy to install or remove the force plate from the pressure sensor body, making the operation convenient and quick.

[0024] The pressure-sensitive layer, electrode layer, and encapsulation layer of the pressure sensor body work together to facilitate the dispersion of macroscopic deformation energy gradients into the reconstruction of the microscopic conductive network, achieving the goals of large range and high response. This enables more accurate sensing of pressure changes and conversion into electrical signals, thereby improving the sensor's sensing performance and measurement accuracy.

[0025] The buffer mechanism consists of multiple interconnected and coordinated components, such as slide bar two and slide plate two, slide bar one and slide plate one, movable rod and slide plate one and slide plate two, etc., forming a stable mechanical structure. During the process of being subjected to force, it can maintain the relative position and motion relationship of each component, ensuring the stable realization of the buffering and installation functions, and thus ensuring the structural stability of the entire pressure distribution sensor.

[0026] The side groove on the outside of the guide post is slidably connected to the side block on the inside of the guide frame, providing precise guidance for the sliding of the guide frame and ensuring that the guide frame will not deviate or shake during the downward movement. This allows the rubber block to accurately collide with the rubber plate, effectively limiting the sliding plate and improving the reliability and stability of the buffer mechanism. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main structure of the pressure sensor of the present invention.

[0028] Figure 2 This is a schematic diagram of the explosion of the pressure sensor body of the present invention.

[0029] Figure 3 This is a schematic diagram of the pressure sensor structure of the present invention.

[0030] Figure 4 This is a schematic diagram of the buffer mechanism structure of the present invention.

[0031] Figure 5 This is a schematic diagram of the mounting frame structure of the present invention.

[0032] Figure 6 This is a schematic diagram of the guide post structure of the present invention.

[0033] Figure 7 This is a schematic diagram of the disassembled structure of the U-shaped frame and mounting frame of the present invention.

[0034] Figure 8 This is a schematic diagram of the drive mechanism structure of the present invention.

[0035] Figure 9 This is a schematic diagram of the translation plate structure of the present invention.

[0036] Reference numerals: 1. Pressure sensor body; 101. Pressure-sensitive layer; 102. Electrode layer; 103. Encapsulation layer; 2. Buffer mechanism; 201. U-shaped frame; 202. Mounting frame; 203. Force-bearing plate; 204. Slide plate one; 205. Slide plate two; 206. Movable rod; 207. Guide post; 208. Base block; 209. Insert rod; 2010. Slide rod one; 2011. Slide rod two; 2012. Rubber plate; 2013. Sleeve plate; 2014. 4. Slideboard 3; 2015. Slide Rod 3; 2016. Spring; 2017. U-shaped Round Rod 1; 2018. Movable Plate; 2019. Rubber Block; 2020. Guide Frame; 2021. Side Groove; 2022. Side Block; 2023. Insert Hole; 3. Drive Mechanism; 301. Two-way Lead Screw; 302. Lead Nut; 303. Drive Plate; 304. Translation Plate; 305. U-shaped Round Rod 2; 306. Handle; 307. Gear; 308. Tooth Plate. Detailed Implementation

[0037] To make the technical solution and advantages of this application clearer, the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only some embodiments of the present invention, and are only used to explain this application, not to limit it. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated; they can be combined with each other to achieve better technical effects. The same reference numerals appearing in the accompanying drawings of the following embodiments represent the same features or components, and can be applied to different embodiments.

[0038] Furthermore, unless otherwise defined, the technical or scientific terms used in the description of this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0039] The present invention will now be described in further detail with reference to the accompanying drawings.

[0040] Example 1 The pressure sensor body 1 includes a pressure-sensitive layer 101, and electrode layers 102 (upper electrode layer and lower electrode layer) are provided on both the upper and lower sides of the pressure-sensitive layer 101. Encapsulation layers 103 (upper encapsulation layer and lower encapsulation layer) are provided on the side of the two electrode layers 102 that are far apart from each other.

[0041] The encapsulation layer is the outer protective structure of the sensor, requiring waterproof, breathable, impact-resistant, and environmentally corrosive properties, while maintaining fabric flexibility. This effectively blocks moisture, dust, and mechanical impacts, while maintaining fabric breathability to adapt to complex environments such as humidity and sweat. It includes an upper encapsulation layer and a lower encapsulation layer. The upper encapsulation layer provides initial protection by dispersing impact forces, while the lower encapsulation layer protects the internal structure from environmental influences.

[0042] Specifically, a thick TPU (thermoplastic polyurethane) or silicone elastic film, 50-100μm thick, is used, combining flexibility and elasticity. The film is bonded to a fabric substrate via a hot-pressing process at 120-150℃, 0.5-1.0MPa, and 30-60 seconds to ensure a balance between bonding strength and flexibility. Ultrasonic welding technology is employed with parameters of 20kHz frequency, 40μm amplitude, 0.4MPa pressure, and 3 seconds welding time to achieve a seamless seal and prevent liquid penetration. Using a polyester fiber fabric as a substrate, a 25μm thick hot-melt adhesive film and a 50μm thick polymer waterproof membrane are sequentially laminated, forming an integrated waterproof layer with an IPX7 waterproof rating through hot-pressing.

[0043] The electrode layer is the core of the sensor's signal acquisition and transmission. It needs to have high conductivity, flexibility, and tensile strength to efficiently acquire pressure signals and transmit electrical signals. The mesh structure and isolation grooves improve signal stability and anti-interference capabilities. It includes an upper electrode layer and a lower electrode layer. The upper electrode layer is used to acquire pressure signals and transmit electrical signals, while the lower electrode layer is used to convert resistance changes into electrical signal output.

[0044] Specifically, a conductive paste containing silver nanowires is applied to the fabric surface via a melt deposition bonding process, forming a continuous electrode layer after curing. The conductive paste is heated to a molten state at 180°C and uniformly coated onto the fabric substrate at a speed of 5 mm / s, then cured at 100°C for 120 seconds to form a conductive layer of uniform thickness. The electrode layer adopts an interlocking ring-shaped mesh structure to ensure stable conductivity under tension and bending. Photothermal ablation is performed using an ultraviolet laser (wavelength 355nm, power 10-20W) at a scanning speed of 20 mm / s to form a channel with a width of 2.0 ± 0.1 mm, penetrating the conductive coating and 50% of the substrate thickness, reducing crosstalk between sensing units.

[0045] The pressure-sensitive layer is the core of the sensor, used to change the distribution density of conductive filler through microstructural deformation, thus inducing a change in resistance. It needs to possess high sensitivity, a wide measurement range, and dynamic stability. High sensitivity (<10 kPa) has been achieved. - ¹) Possesses a wide pressure sensing range (0.1-500 kPa) while maintaining dynamic stability. Specifically, carbon nanotubes and / or graphene are mixed with polymer particles, and a pressure-sensitive layer is formed by controlling the filler concentration (10-20 wt%) and distribution. The pressure-sensitive layer adopts a micro pyramid or porous foam microstructure to enhance the consistency of pressure response, enabling it to maintain stable output under dynamic loads. The upper and lower surfaces of the pressure-sensitive layer are tightly bonded to the upper and lower electrode layers, respectively, through hot pressing to form a resistance change capture circuit.

[0046] The assembly sequence is as follows: Prepare the lower encapsulation layer; stack the lower electrode layer, pressure-sensitive layer, and upper electrode layer sequentially on the lower encapsulation layer; cover with the upper encapsulation layer, and achieve tight bonding between the layers by hot pressing (temperature 120-150℃, pressure 1.0-2.0MPa, time 5-10 minutes) or ultrasonic welding (frequency 20kHz, amplitude 30-50μm, pressure 0.3-0.5MPa); seal the edges by ultrasonic welding with a sealing width of 3mm.

[0047] Example 2 Depend on Figures 1-9 The present invention relates to a high-density array pressure distribution sensor of multilayer functional fabric stacking, comprising a pressure sensor body 1, a buffer mechanism 2 provided on the top of the pressure sensor body 1, and a drive mechanism 3 provided on the buffer mechanism 2.

[0048] Example 3 Based on Embodiment 1, the buffer mechanism 2 includes two U-shaped frames 201 symmetrically fixed to the top of the pressure sensor body 1. A mounting frame 202 is provided between the tops of the two U-shaped frames 201. A base block 208 is fixedly connected to the bottom of the mounting frame 202 near each of the four corners. The base block 208 penetrates through the U-shaped frame 201. Two sliding rods 2015 are symmetrically fixedly connected to the bottom of the mounting frame 202. Both sliding rods 2015 are located between the two U-shaped frames 201. A sliding plate 2014 is movably sleeved on the outer side of each sliding rod 2015. A spring 2016 is fixedly connected between each sliding plate 2014 and the mounting frame 202. The two springs 2016 are respectively sleeved on the two... On the outer side of slide bar 3 2015 and the top of two slide plates 3 2014, U-shaped round rods 1 2017 are fixedly connected. Both U-shaped round rods 1 2017 pass through the mounting frame 202 and are movably connected to it. Two sleeve plates 2013, both located above the mounting frame 202, are symmetrically fixedly sleeved between the two U-shaped round rods 1 2017. A load-bearing plate 203 is fixedly installed between the tops of the two sleeve plates 2013. Slide bar 2 2011 is fixedly connected to the inner side of each of the two U-shaped frames 201. Two slide plates 205 are symmetrically and movably sleeved between the two slide bars 2 2011. Two insert rods 209 are symmetrically fixedly connected to the sides of the two slide plates 205 that are furthest from each other. Each bottom block... The outer side of 208 is provided with insertion holes 2023, and each insertion rod 209 is inserted into the respective insertion hole 2023. Two slide rods 2010 are symmetrically and fixedly connected between two slide rods 2011. Two slide plates 204 are symmetrically and movably sleeved between two slide rods 2010. Two movable rods 206 are symmetrically and rotatably connected to the outer side of slide plate 205. The ends of the two movable rods 206 away from slide plate 205 are rotatably connected to the two slide plates 204 respectively. A guide post 207 is fixedly connected to the inner side of the mounting frame 202. Two guide frames 2020 are symmetrically and movably sleeved on the outer side of the guide post 207. Two rubber rods are symmetrically and fixedly connected to the sides of the two guide frames 2020 that are close to each other. Rubber block 2019, two slide plates 204 are located between two guide frames 2020, rubber plates 2012 are fixedly connected to the side of the two slide plates 204 that are far apart from each other, a side groove 2021 is provided on the outer side of the guide post 207, a side block 2022 is fixedly connected to the inner side of the two guide frames 2020, and the two side blocks 2022 are slidably connected to the side groove 2021. The stability of the guide frame 2020 when sliding on the guide post 207 is ensured by the cooperation between the side blocks 2022 and the side groove 2021. The bottom of the two sleeve plates 2013 is rotatably connected to the movable plate 2018, and the bottom of the two movable plates 2018 is rotatably connected to the top of the two guide frames 2020 respectively. First, place the mounting frame 202 on top of the two U-shaped frames 201, so that the bottom block 208 passes through the corresponding U-shaped frame 201. Then, slide both slide plates 204 along the two slide rods 2010. The movable rod 206 drives the two slide plates 205 to slide along the two slide rods 2011 until each insertion rod 209 is inserted into the respective insertion hole 2023. Fix the mounting frame 202 on top of the two U-shaped frames 201, thus installing the force plate 203. When the pressure sensor body 1 is subjected to force, the impact force acts directly on the force plate 203. The two sleeve plates 2013 drive the two U-shaped round rods 2017 to move, and drive the two slide plates 2014 to slide along the two U-shaped round rods 2011 respectively. When slide bar 3 2015 slides, both springs 2016 deform. Simultaneously, the two movable plates 2018 drive the two guide frames 2020 to slide along the guide post 207. Meanwhile, the rubber block 2019 moves and collides with the rubber plate 2012, causing both the rubber block 2019 and the rubber plate 2012 to deform. At the same time, the two sliding plates 204 are limited to prevent the insert rods 209 from disengaging from their respective insertion holes 2023, further ensuring the stability of the mounting frame 202. Thus, the impact force is buffered by the elastic force of the springs 2016, rubber blocks 2019, and rubber plates 2012, ultimately improving the impact resistance of the pressure sensor body 1 and preventing damage.

[0049] Example 4 Based on Embodiment 1, the drive mechanism 3 includes a bidirectional lead screw 301 rotatably connected between two U-shaped frames 201. Two nuts 302 are symmetrically threaded on the outer side of the bidirectional lead screw 301. Two slide plates 204 are fixed to the bottom of the two nuts 302 respectively. A gear 307 is fixedly installed on the outer side of the bidirectional lead screw 301. A U-shaped round rod 305 is fixedly connected to the outer side of one of the U-shaped frames 201. A translation plate 304 is movably sleeved on the outer side of the U-shaped round rod 305. A toothed plate 308 is fixedly connected to the top of the translation plate 304. The toothed plate 308 meshes with the gear 307. A drive plate 303 is fixedly connected to the bottom of the translation plate 304. A handle 306 is fixedly connected to the outer side of the drive plate 303. The drive plate 303 is movably sleeved on the outer side of one of the slide rods 2011. First, hold the handle 306 and slide the drive plate 303 along the corresponding slide bar 2011, causing the translation plate 304 to slide along the U-shaped rod 305, and causing the toothed plate 308 to move. Since the toothed plate 308 meshes with the gear 307, it drives the bidirectional lead screw 301 to rotate. Then, through the two nuts 302, the two slide plates 204 are driven to slide along the two slide bars 2010, so that each insertion rod 209 is inserted into each insertion hole 2023. Finally, the force plate 203 is installed on the pressure sensor body 1.

[0050] The above content is merely an embodiment of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all prior art in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can improve and implement this solution based on the guidance provided in this application and their own capabilities. Some typical well-known structures or systems should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-density array pressure distribution sensor made of multilayer functional fabric stacks, characterized in that: The pressure sensor body (1) includes: a pressure-sensitive layer (101) composed of carbon nanotubes and / or graphene mixed with polymer particles, using a micro pyramid or porous foam microstructure; an electrode layer (102) using an interlocking ring mesh structure, forming channels through photothermal ablation, the electrode layer (102) including an upper electrode layer and a lower electrode layer, the upper electrode layer and the lower electrode layer being located on the upper and lower sides of the pressure-sensitive layer (101) respectively; and an encapsulation layer (103) including an upper encapsulation layer and a lower encapsulation layer, the upper encapsulation layer and the lower encapsulation layer being located on the side of the upper electrode layer and the lower electrode layer that are far apart from each other, the upper and lower surfaces of the pressure-sensitive layer (101) being tightly bonded to the entire area of ​​the upper electrode layer and the lower electrode layer respectively.

2. The high-density array pressure distribution sensor of multilayer functional fabric stacking according to claim 1, characterized in that: The pressure sensor body (1) is provided with a buffer mechanism (2) on its top, and a drive mechanism (3) is provided on the buffer mechanism (2).

3. The high-density array pressure distribution sensor of multilayer functional fabric stacking according to claim 2, characterized in that: The buffer mechanism (2) includes two U-shaped frames (201) symmetrically fixed to the top of the pressure sensor body (1). A mounting frame (202) is provided between the tops of the two U-shaped frames (201). A bottom block (208) is fixedly connected to the bottom of the mounting frame (202) near the four corners. The bottom block (208) passes through the U-shaped frame (201). Two sliding rods (2015) are symmetrically fixedly connected to the bottom of the mounting frame (202). The two sliding rods (2015) are located between the two U-shaped frames (201). A sliding plate (2014) is movably sleeved on the outside of the two sliding rods (2015). The two sliding plates (2014) are 2... Springs (2016) are fixedly connected between 014 and the mounting frame (202). The two springs (2016) are respectively sleeved on the outside of the two sliding rods (2015). The top of the two sliding plates (2014) is fixedly connected to the U-shaped round rods (2017). The two U-shaped round rods (2017) pass through the mounting frame (202) and are movably connected to the mounting frame (202). Two sleeve plates (2013) are symmetrically fixedly sleeved between the two U-shaped round rods (2017) and are located above the mounting frame (202). A force plate (203) is fixedly installed between the tops of the two sleeve plates (2013).

4. A high-density array pressure distribution sensor based on multilayer functional fabric stacking according to claim 3, characterized in that: The inner sides of the two U-shaped frames (201) are fixedly connected with slide rods (2011), and two slide plates (205) are symmetrically and movably connected between the two slide rods (2011). Two insert rods (209) are symmetrically and fixedly connected on the side of the two slide plates (205) that are far apart from each other. Each bottom block (208) is provided with a socket (2023) on its outer side, and each insert rod (209) is inserted into the socket (2023) respectively.

5. A high-density array pressure distribution sensor based on a multilayer functional fabric stack according to claim 4, characterized in that: Two slide rods (2010) are symmetrically fixedly connected between the two slide rods (2011). Two slide plates (204) are symmetrically movably sleeved between the two slide rods (2010). Two movable rods (206) are symmetrically rotatably connected to the outer side of the slide plate (205). The ends of the two movable rods (206) away from the slide plate (205) are rotatably connected to the two slide plates (204) respectively.

6. A high-density array pressure distribution sensor based on a multilayer functional fabric stack according to claim 5, characterized in that: The inner side of the mounting frame (202) is fixedly connected to a guide post (207), and two guide frames (2020) are symmetrically and movably sleeved on the outer side of the guide post (207). Two rubber blocks (2019) are symmetrically fixedly connected on the side of the two guide frames (2020) that are close to each other. Two slide plates (204) are located between the two guide frames (2020), and rubber plates (2012) are fixedly connected on the side of the two slide plates (204) that are far apart from each other.

7. A high-density array pressure distribution sensor based on a multilayer functional fabric stack according to claim 6, characterized in that: The guide post (207) has a side groove (2021) on its outer side, and the inner sides of the two guide frames (2020) are fixedly connected with side blocks (2022), and the two side blocks (2022) are slidably connected to the side groove (2021).

8. A high-density array pressure distribution sensor based on a multilayer functional fabric stack according to claim 3, characterized in that: The bottom of each of the two sleeve plates (2013) is rotatably connected to a movable plate (2018), and the bottom of each movable plate (2018) is rotatably connected to the top of the two guide frames (2020).

9. A high-density array pressure distribution sensor based on multilayer functional fabric stacking according to claim 3, characterized in that: The drive mechanism (3) includes a bidirectional lead screw (301) rotatably connected between two U-shaped frames (201). Two nuts (302) are symmetrically threaded on the outer side of the bidirectional lead screw (301). Two slide plates (204) are fixed to the bottom of the two nuts (302). A gear (307) is fixedly installed on the outer side of the bidirectional lead screw (301). A U-shaped round rod (305) is fixedly connected to the outer side of one of the U-shaped frames (201). A translation plate (304) is movably sleeved on the outer side of the U-shaped round rod (305). A toothed plate (308) is fixedly connected to the top of the translation plate (304). The toothed plate (308) meshes with the gear (307).

10. A high-density array pressure distribution sensor based on a multilayer functional fabric stack according to claim 9, characterized in that: The bottom of the translation plate (304) is fixedly connected to a drive plate (303), and the outside of the drive plate (303) is fixedly connected to a handle (306). The drive plate (303) is movably sleeved on the outside of one of the slide bars (2011).

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