Automatically adjustable seat based on spacer fabric friction nanometer generator

Abstract

The invention discloses an automatically adjustable seat based on spaced fabric friction nano-generators, which comprises a seat body, the outer surface of the seat body is coated with fabric woven by spaced friction nano-generators, and pressure sensing units are distributed on the inner layer of the spaced friction nano-generator fabric. The pressure sensing unit is used for detecting the pressure distribution of the back and the hip of the user, the angle and the position of the seat can be automatically adjusted according to the pressure data to achieve the comfortable angle of the human body, and the user experience and the comfort can be greatly improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle seats, and more particularly to an automatically adjustable seat based on a spaced fabric triboelectric nanogenerator. Background Technology

[0002] With the rapid development of modern society, car ownership continues to rise, making cars an indispensable means of transportation in modern life and significantly improving people's travel efficiency. However, while enjoying the convenience brought by cars, users are placing more stringent demands on vehicle features and performance, showing an increasingly diversified and intelligent trend in their needs. During driving, the angle of the seat directly affects the driver's comfort. If real-time pressure monitoring of various parts of the driver's body could be achieved, the seat angle could be precisely adjusted based on the pressure data, thereby greatly improving driving comfort and enhancing the user's driving experience.

[0003] Currently, adjusting the angle of car seats requires manual button adjustments, which has significant drawbacks. First, different users have significantly different preferences for the driver's seat angle, often requiring manual adjustment after getting in the car, making the adjustment inconvenient. Second, manual adjustments often cannot be made to achieve the desired angle in one go, requiring multiple adjustments and resulting in a poor user experience. Summary of the Invention

[0004] The problem solved by this invention is to provide an automatically adjustable seat based on a spaced fabric friction nanogenerator, which can automatically adjust the seat angle and position according to pressure data to achieve a comfortable angle for the human body, thereby greatly improving the user experience and comfort.

[0005] This invention provides an automatically adjustable seat based on a spaced fabric triboelectric nanogenerator, comprising a seat body, characterized in that the outer surface of the seat body is covered with a fabric woven from a spaced fabric triboelectric nanogenerator, and pressure sensing units are distributed in the inner layer of the spaced fabric triboelectric nanogenerator to detect the pressure distribution on the user's back and buttocks.

[0006] Furthermore, the spaced friction nanogenerator fabric is integrated into the seat cushion and backrest of the seat body.

[0007] Further, the pressure sensing unit comprises a plurality of pressure sensors, the plurality of pressure sensors are arranged at the cushion position and the backrest position of the seat body in a matrix distribution manner, the pressure sensing unit is electrically connected with the spacer friction nanometer generator fabric at the position and detects the pressure signal, the pressure sensing unit is also connected with a signal processor, and the signal processor is also electrically connected with a seat adjusting unit, so that the position and the angle of the seat are adjusted through the seat adjusting unit.

[0008] Further, the spacer friction nanometer generator fabric comprises a positive friction layer, a spacer layer and a negative friction layer, and the negative friction layer is a user contact layer.

[0009] Further, the positive friction layer is knitted by silver-plated polyamide yarn, the spacer layer is knitted by polyester, and the negative friction layer is knitted by polyester monofilament.

[0010] Further, the bottom of the seat body is connected with a slide rail, the seat adjusting unit comprises a power motor, the power motor comprises two power motors arranged at the outside of the slide rail and the bottom of the seat respectively, and the front-back position of the seat body and the angle of the backrest position relative to the cushion position are adjusted through the seat adjusting unit.

[0011] The automatic-adjustable seat based on the spacer fabric friction nanometer generator has the beneficial effects that: the seat is coated with the fabric knitted by the spacer friction nanometer generator on the outer surface, so that corresponding pressure signals can be generated according to the friction pressure degree of the spacer friction nanometer generator fabric and the human body during use, the pressure distribution data are collected through the pressure sensing unit, and it can be judged whether the user is comfortable in the cabin according to the data analysis, the comfort of the intelligent cabin is improved, and the satisfaction of the user for the intelligent cabin of the automobile is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a seat structure schematic view of the present application; Figure 2 It is a structure schematic view of the seat structure of the present application; Figure 3 It is a side view of the seat structure of the present application; Figure 4 It is a structure schematic view of the spacer friction nanometer generator fabric of the present application; Figure 5 It is a voltage signal actual output waveform diagram and data under different pressure of the present application; MARKED FOR EXPLANATION: 1, seat body; 2, cushion position; 3, backrest position; 4, slide rail; 5, interval friction nanogenerator fabric; 6, positive friction layer; 7, interval layer; 8, negative friction layer; 9, pressure sensing unit; 10, signal processor; 11, seat adjustment unit. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0014] Wherein, the same parts are indicated by the same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present application specification, and the words "bottom" and "top", "inner" and "outer" refer to the direction towards or away from a particular component. In addition, the terms "first", "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application specification, the meaning of "multiple" is two or more.

[0015] The present application will be further described below with reference to the drawings and embodiments.

[0016] An automatically adjustable seat based on interval fabric friction nanogenerator, as shown in Figure 1 , 2 The seat body 1 is coated with a fabric made of interval friction nanogenerator weaving, and the interval friction nanogenerator fabric 5 can be woven with a weft-knitted interval fabric structure. This ensures that the interval friction nanogenerator fabric 5 is in close and effective contact with the human body, and the inner layer (away from the user contact side) of the interval friction nanogenerator fabric 5 is distributed with a pressure sensing unit 2, which detects the pressure distribution data of the user's back and hips, and the detection device is flexible to avoid discomfort when the user contacts. In this way, by using flexible fabric design combined with pressure detection, the present application can effectively avoid the problem of hard contact with foreign matter that may occur in the design of hardware sensors, making the user uncomfortable. In this way, when the user sits on the seat, they not only feel the comfortable sitting experience brought by the seat of the present application, but also can monitor the pressure situation in real time under comfortable conditions, thereby greatly improving the user's experience and satisfaction.

[0017] Further, the seat 1 body cushion position 2 and the chair back position 3 are both integrated with a spacer friction nanometer generator fabric 8. The spacer friction nanometer generator fabric 5 contains an ordered hierarchical structure, which specifically includes a positive friction layer 6, a spacer layer 7 and a negative friction layer 8. Preferably, the positive friction layer 6 is knitted with conductive yarn material, the conductive yarn can be knitted with silver-plated chinlon yarn, the spacer layer 7 is knitted with polyester, and the negative friction layer 8 is knitted with polyester monofilament, wherein the negative friction layer 8 is the layer in contact with the user, and the three layers of yarn are knitted by a knitting machine to form a 3D spacer fabric.

[0018] The conductive yarn (positive friction layer 6) has good elasticity, is compatible with the three-dimensional structure of the 3D spacer fabric, provides good deformation recovery ability and air permeability, has positive electrical properties: located at the positive end of the triboelectric series, can be paired with negative materials, has processing flexibility: can be made into porous or fibrous structure, enhances the friction contact area and pressure response sensitivity, and has excellent durability: strong fatigue resistance, suitable for repeated mechanical deformation scenarios, and the silver-plated layer endows it with conductivity as a conductive electrode, also improves its wear resistance and antibacterial properties.

[0019] The polyester (negative friction layer 8) is at the negative end of the triboelectric series and can produce extremely high charge separation efficiency when paired with positive materials, while the polyester has excellent strength, can extend the device life, and has good chemical stability and corrosion resistance and high temperature resistance.

[0020] The polyester monofilament (spacer layer 7) is an ideal spacer yarn material, which has good elasticity, can maintain the stability of the contact area between the positive and negative friction layers during long-term use, and can deform (shrink or recover) in time after the hip or back pressure changes, improving the sensitivity of the hip or back pressure sensing.

[0021] The spacer friction nanometer generator fabric (5) is not uniformly covered on the entire seat, but is integrated in two key stress areas of the seat body (1) according to the principle of ergonomics: the cushion position (2) is used to sense the pressure distribution of the user's hips and thighs, and the chair back position (3) is used to sense the pressure distribution of the user's back. This zoning arrangement can accurately capture data from the two main pressure areas when the user is sitting, providing accurate and independent signal sources for subsequent intelligent adjustment.

[0022] The fabric adopts an innovative "sandwich" type multi-layer composite structure (as shown in Figure 4 From top to bottom (from the user's contact surface to the seat lining surface), it includes: The negative friction layer (8 - user contact layer) is made of polyester yarn. This layer is in direct contact with the human body, so the material selection focuses on comfort, durability and chemical stability. Polyester is at the negative end of the triboelectric series, and when it comes into contact with the positive friction layer, it can effectively capture electrons and generate a high-strength negative charge. Its excellent strength ensures its longevity under long-term friction.

[0023] The spacer layer (7 - response and support layer) is made of polyester monofilament. The spacer layer forms a three-dimensional elastic structure. Under pressure, this layer deforms elastically (is compressed), thereby changing the contact area and separation distance between the upper and lower layers (positive and negative friction layers). The greater the pressure, the greater the deformation, the more complete the contact, and the stronger the output electrical signal. Its good elasticity ensures that it quickly returns to its original shape after the pressure is removed, making it ready for the next pressure sensing, thereby greatly improving the sensitivity and dynamic response speed of the pressure sensor. The three-dimensional structure also brings excellent air permeability, improving the comfort of the seat.

[0024] The positive friction layer (6 - electrode and functional layer) is made of silver-plated nylon yarn. This layer has both triboelectric and conductive electrode functions. Triboelectric power generation: nylon is at the positive end of the triboelectric series and easily loses electrons to become positively charged, forming a pair of efficient triboelectric material combinations with the negative friction layer of polyester. The silver-plated layer gives the yarn excellent conductivity, allowing it to act as an electrode that efficiently collects the charge generated by friction and outputs it as an electrical signal. Its good elasticity ensures compatibility with the deformation of the spacer layer.

[0025] This arrangement matches the physical process of the seat being pressed: Initial state: When no one is sitting, the spacer layer supports the positive and negative friction layers to remain separated.

[0026] Pressed state: After the user sits down, the buttocks / back apply pressure, which is transmitted through the negative friction layer, causing the spacer layer to be compressed, thereby causing the positive friction layer to come into contact with the negative friction layer and generate triboelectricity.

[0027] Signal generation: The greater the pressure, the greater the compression deformation, the greater the contact area between the two layers, the more triboelectric charge generated, and the stronger the output voltage signal (as shown in Figure 5 , which can reach up to 30V or more).

[0028] Signal acquisition: This strong electrical signal is captured by the pressure sensor unit (9) (such as a resistance strain gauge) integrated in the inner layer of the fabric (on the side of the positive friction layer), or the voltage signal itself is used as the pressure sensing signal, which is transmitted to the signal processor (10).

[0029] Specifically, as Figure 3As shown, the pressure sensing unit 9 includes multiple pressure sensors, which can be resistance strain gauge pressure sensors. The multiple pressure sensors are distributed in a matrix at the seat cushion position 2 and the backrest position 3 of the seat body 1. The pressure sensing unit 9 is electrically connected to the interval friction nanogenerator fabric 5, which is used to detect the pressure data of the backrest or the seat cushion. The pressure sensing unit 9 is also connected to the signal processor 10 for processing the pressure signal data. The signal processor 10 can be an AT128 microcontroller. The signal processor 10 is also electrically connected to the seat adjustment unit 11. The bottom of the seat body 1 is connected to the slide rail 4. The seat adjustment unit 11 includes two motors (not shown in the figure), which are respectively located outside the slide rail 4 and at the bottom of the seat body 1. The seat adjustment unit 11 adjusts the fore-and-aft position of the seat 1 and the angle of the backrest position 3 relative to the seat cushion position 2.

[0030] During operation, the backrest angle is adjusted as follows: When the user sits on the seat 1, both the seat cushion 2 and the backrest 3 are compressed. The positive and negative friction layers of the intermittent friction nanogenerator fabric 5 contact to generate corresponding electrical signals. When the user is in an uncomfortable sitting posture, such as when the backrest angle of the seat 1 is too small or the pressure between the user's back and the backrest 3 is too high, the pressure value is transmitted to the signal processor 10 through the pressure sensing unit 9 at the backrest 3. The signal processor 10 compares the real-time detection data with the preset backrest pressure data threshold. When the pressure exceeds the threshold, the signal processor 10 activates the motor used to control the backrest angle adjustment, increasing the backrest angle to ensure seat comfort.

[0031] Overall seat position adjustment: The pressure sensing unit 9 located at the seat cushion position 2 can detect the pressure data of the user's buttocks and thighs in real time. For example, when the overall position of the seat 1 is too far from the accelerator position, the contact pressure between the human body and the seat cushion position 2 will be large. At this time, the contact area of ​​the positive and negative friction layers of the interval friction nanogenerator fabric 5 increases, and the output electrical signal value is large. The pressure data at this location is transmitted to the signal processor 10 for processing through the pressure sensing unit 9. The signal processor 10 compares the real-time detection data information with the preset seat cushion position pressure data threshold. When it is greater than the threshold, the signal processor 10 activates the power motor used to control the front and rear position of the seat 1 to achieve the front and rear adjustment of the cabin position.

[0032] like Figure 5 The figure shows the measured output waveforms and data of the voltage signal under different pressures. The formulas for pressure and output voltage are as follows: Voc(P)≈[σ(P)* d eq(P)] / ε0 Where: σ: surface density of triboelectric charge (C / m) 2 This is the charge density generated by the friction between two materials in contact; d: separation distance between two electrode plates (m); e0: vacuum permittivity (8.85 x 10⁻ 12 F / m).

[0033] According to the figure, the voltage signal collected under different pressures can reach a value of more than 30V, so the relative accuracy is higher, and the accuracy of seat adjustment is further ensured.

[0034] In summary, the automatic adjustable seat based on the interval fabric friction nanogenerator has practical value in intelligent driving, and can effectively solve the problems in the traditional seat adjustment scheme, and provide users with a more comfortable driving experience.

[0035] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Any technical solution generated by replacing the equivalent structure or equivalent process based on the essential concept of the present application, using the content described in the specification and the drawings, is included in the protection scope of the patent of the present application.

Claims

1. An automatically adjustable seat based on a spaced fabric triboelectric nanogenerator, comprising a seat body, characterized in that, The outer surface of the seat body is covered with a fabric woven from interval triboelectric nanogenerators. Pressure sensing units are distributed in the inner layer of the interval triboelectric nanogenerator fabric to detect the pressure distribution on the user's back and buttocks.

2. The automatically adjustable seat based on a spaced fabric triboelectric nanogenerator according to claim 1, characterized in that, The spaced triboelectric nanogenerator fabric is integrated into the seat cushion and backrest of the seat body.

3. The automatically adjustable seat based on a spaced fabric triboelectric nanogenerator according to claim 1, characterized in that, The pressure sensing unit includes multiple pressure sensors, which are arranged in a matrix at the seat cushion and backrest of the seat body. The pressure sensing unit is electrically connected to the spaced triboelectric nanogenerator fabric at its location to detect pressure signals. The pressure sensing unit is also connected to a signal processor, which is electrically connected to a seat adjustment unit to adjust the position and angle of the seat.

4. The automatically adjustable seat based on a spaced fabric triboelectric nanogenerator according to claim 1, characterized in that, The spaced triboelectric nanogenerator fabric includes a positive friction layer, a spacer layer, and a negative friction layer, wherein the negative friction layer is the layer in contact with the user.

5. The automatically adjustable seat based on a spaced fabric triboelectric nanogenerator according to claim 1, characterized in that, The positive friction layer is made of silver-plated nylon yarn, the spacer layer is made of polyester, and the negative friction layer is made of polyester monofilament.

6. The automatically adjustable seat based on a spaced fabric triboelectric nanogenerator according to claim 1, characterized in that, The bottom of the seat body is connected to a slide rail. The seat adjustment unit includes two motors, which are respectively located outside the slide rail and at the bottom of the seat. The seat adjustment unit adjusts the fore-and-aft position of the seat body and the angle of the backrest relative to the seat cushion.

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