Flexible sensor, preparation method thereof and vehicle terminal
By stretching the fiber membrane raw materials, the gap between fibers is enlarged and conductive solution is injected to form a stable conductive network, which solves the problem of unstable conductivity of flexible sensors and significantly improves monitoring accuracy.
Patent Information
- Application Number
- CN202411085326.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2024-12-10
AI Technical Summary
During long-term use, the conductive dielectric only stays on the surface due to the poor stability of the fiber membrane during the flexible pressure sensor, which has unstable conductivity and reduced monitoring accuracy.
The fiber membrane raw material is stretched through a stretching clamp, the gap between fibers is enlarged, the conductive solution is injected and dried to form a uniformly distributed conductive network to ensure the stable connection of the conductive layer.
Improves the conductive stability and durability of the sensor, enhances monitoring accuracy, and maintains stable conductive properties even in complex environments.
Smart Images
Figure CN119104093A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of vehicle sensors, and in particular to a flexible sensor and a preparation method thereof, and a vehicle terminal. Background Art
[0002] With the rapid development of science and technology and the continuous expansion of the industrial field, special vehicles have become an important pillar of modern social operation, and are widely used in many key fields such as military operations, emergency rescue, geological exploration and cargo transportation. When performing tasks, these special vehicles often require operators to be in a complex and changing environment for a long time, facing high-intensity work pressure and extreme environmental conditions.
[0003] Therefore, how to effectively monitor and ensure the health of operators on special vehicles has become an important technical problem that needs to be solved urgently. In this context, flexible pressure sensors, as an innovative means of health monitoring, have gradually attracted widespread attention in the industry. Its unique flexible properties enable the sensor to fit closely to human skin, achieving non-invasive, continuous and accurate monitoring of physiological parameters, and providing a new solution for health monitoring of personnel on special vehicles. In particular, capacitive flexible pressure sensors, with their significant advantages such as simple structural design, low energy consumption, rapid dynamic response and strong environmental adaptability, have shown great application potential and broad market prospects in the field of health monitoring.
[0004] However, although the flexible pressure sensor improves the user's wearing comfort by adopting soft materials such as PU fiber membrane and fabric, the conductive medium in the electrode layer of the sensor is only attached to the surface of the fiber membrane, which makes the fiber membrane less stable and easy to fall off during long-term use, thereby reducing the monitoring accuracy of the sensor. Summary of the invention
[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.
[0006] In view of the above-mentioned shortcomings of the prior art, the present application discloses a flexible sensor and a preparation method thereof, and a vehicle terminal to improve the monitoring accuracy of the flexible sensor.
[0007] The present application discloses a method for preparing a flexible sensor, comprising: taking a fiber membrane raw material and setting it on a stretching clamp, and stretching the fiber membrane raw material by the stretching clamp to obtain a stretched raw material, wherein the stretched raw material includes a load surface and an external surface; dip-coating a conductive solution carrying conductive particles on the load surface to use the stretched raw material carrying the conductive particles as a load raw material, and drying the load raw material to obtain an electrode layer raw material; preparing a sensor electrode layer according to the electrode layer raw material, and preparing a sensor dielectric layer through a fabric raw material; assembling the sensor electrode layer and the sensor dielectric layer to obtain a flexible sensor, wherein the load surface of the sensor electrode layer contacts the sensor dielectric layer.
[0008] In one embodiment of the present application, the fiber membrane raw material is prepared by the following method: thermoplastic polyurethane particles are dissolved in a preset solvent to form a fiber precursor solution; and the fiber precursor solution is subjected to electrostatic spinning to obtain the fiber membrane raw material.
[0009] In one embodiment of the present application, thermoplastic polyurethane particles are dissolved in a preset solvent to form a fiber precursor solution, including: taking thermoplastic polyurethane particles, and cleaning the oil and pollutants in the thermoplastic polyurethane particles; rinsing the thermoplastic polyurethane particles with an ethanol solution; cleaning the thermoplastic polyurethane particles with deionized water; drying the thermoplastic polyurethane particles; adding the thermoplastic polyurethane particles to a preset solvent, and magnetically stirring the preset solvent to which the thermoplastic polyurethane particles are added until the thermoplastic polyurethane particles are dissolved in the preset solvent to form a fiber precursor solution, wherein the preset solvent is a mixed solution of dimethylformamide and acetone.
[0010] In one embodiment of the present application, the fiber membrane raw material is stretched by the stretching clamp to obtain the stretched raw material, including: obtaining the stress points of the fiber membrane raw material, and clamping each of the stress points by the stretching clamp, wherein the stress points include rectangular vertices and / or rectangular edges of the fiber membrane raw material; applying tension to each stress point of the fiber membrane raw material by the stretching clamp to stretch the fiber membrane raw material to obtain the stretched raw material.
[0011] In one embodiment of the present application, the method also includes at least one of the following: the area ratio between the stretched raw material and the fiber membrane raw material before stretching is greater than or equal to a preset area ratio threshold; if the shape of the fiber membrane raw material is a rectangle, then the side length of the stretched raw material on any rectangular side is greater than or equal to a preset length threshold, wherein the preset length threshold is determined based on the side length of the fiber membrane raw material on the rectangular side before stretching.
[0012] In one embodiment of the present application, the load raw material is dried to obtain an electrode layer raw material, including: removing the stretching clamp set on the load raw material; respectively setting planar clamps on the load surface and external surface of the load raw material, and clamping the load raw material by the planar clamps, wherein the planar clamps are parallel to the load raw material; placing the load raw material in an oven for drying to obtain an electrode layer raw material.
[0013] In one embodiment of the present application, a sensor dielectric layer is prepared using a fabric material, including: soaking the fabric material in an alcohol solution, wherein the fabric material is formed by directional or random arrangement of textile fibers; after a preset soaking time, cleaning the fabric material using an ultrasonic oscillator; after a preset cleaning time, cleaning the fabric material using deionized water; and drying the cleaned fabric material to obtain a sensor dielectric layer.
[0014] In one embodiment of the present application, a flexible sensor is obtained by assembling the sensor electrode layer and the sensor dielectric layer, including: the sensor electrode layer includes a first electrode layer and a second electrode layer; the sensor dielectric layer is sandwiched between the first electrode layer and the second electrode layer, and the sensor dielectric layer contacts a first load surface and a second load surface respectively, wherein the first load surface is the load surface of the first electrode layer, and the second load surface is the load surface of the second electrode layer; wires are connected to each of the sensor electrode layers by conductive glue, and the sensor electrode layer and the sensor dielectric layer are packaged by an adhesive to obtain a flexible sensor.
[0015] The present application discloses a flexible sensor, which is manufactured according to the above-mentioned manufacturing method.
[0016] The present application discloses a vehicle terminal, comprising the above-mentioned flexible sensor.
[0017] Beneficial effects of this application:
[0018] The fiber membrane material is stretched by a stretching fixture, and the conductive solution is injected into the stretched material after stretching and dried, so as to assemble the sensor electrode layer made of the electrode layer material and the sensor dielectric layer made of the fabric material to obtain a flexible sensor. In this way, by stretching the fiber membrane material, the gap between the fibers is effectively increased, so that the conductive solution injected subsequently can penetrate deeper into the fiber gap, rather than just staying on the surface, ensuring the uniform distribution and stable connection of the conductive network inside the fiber membrane, even if the vehicle runs for a long time in a complex environment with humidity, vibration or drastic temperature changes, it can maintain stable conductive performance, significantly improve the conductive stability and durability of the sensor electrode layer, and thus improve the monitoring accuracy of the flexible sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic flow chart of a method for preparing a flexible sensor in an embodiment of the present invention;
[0020] Figure 2 is a schematic flow chart of another method for preparing a flexible sensor according to an embodiment of the present invention;
[0021] Figure 3 is a schematic structural diagram of a flexible sensor in an embodiment of the present invention;
[0022] Figure 4 It is a schematic diagram of measuring pulse vibration based on a flexible sensor in an embodiment of the present invention. DETAILED DESCRIPTION
[0023] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and sub-samples in the embodiments can be combined with each other without conflict.
[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0025] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.
[0026] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.
[0027] Unless otherwise stated, the term "plurality" means two or more.
[0028] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.
[0029] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.
[0030] Combination Figure 1 As shown, the embodiment of the present disclosure provides a method for preparing a flexible sensor, comprising:
[0031] Step S101, taking a fiber membrane raw material and placing it on a stretching fixture, and stretching the fiber membrane raw material by the stretching fixture to obtain a stretched raw material;
[0032] wherein the stretched stock comprises a load-bearing surface and an external surface;
[0033] Step S102, dip-coating a conductive solution carrying conductive particles onto the load surface, using the stretched raw material carrying the conductive particles as the load raw material, and drying the load raw material to obtain an electrode layer raw material;
[0034] Step S103, manufacturing a sensor electrode layer according to the electrode layer raw material, and manufacturing a sensor dielectric layer through the fabric raw material;
[0035] Step S104, assembling the sensor electrode layer and the sensor dielectric layer to obtain a flexible sensor;
[0036] The load surface of the sensor electrode layer contacts the sensor dielectric layer.
[0037] The method for preparing a flexible sensor provided by the embodiment of the present disclosure is adopted, the fiber membrane raw material is stretched by a stretching fixture, the stretched raw material is injected with a conductive solution and dried, and then the sensor electrode layer made from the electrode layer raw material and the sensor dielectric layer made from the fabric raw material are assembled to obtain a flexible sensor. In this way, by stretching the fiber membrane raw material, the gap between the fibers is effectively increased, so that the conductive solution injected subsequently can penetrate deeper into the fiber gaps, rather than just staying on the surface, ensuring the uniform distribution and stable connection of the conductive network inside the fiber membrane, and maintaining stable conductive performance even when the vehicle is running for a long time in a complex environment with humidity, vibration or drastic temperature changes, significantly improving the conductive stability and durability of the sensor electrode layer, thereby improving the monitoring accuracy of the flexible sensor.
[0038] In some embodiments, the fiber membrane raw material includes an insulating high molecular polymer film processed by an electrospinning process.
[0039] Optionally, the fiber membrane raw material is prepared in the following manner: thermoplastic polyurethane particles are dissolved in a preset solvent to form a fiber precursor solution; and the fiber precursor solution is subjected to electrostatic spinning to obtain the fiber membrane raw material.
[0040] Optionally, thermoplastic polyurethane particles are dissolved in a preset solvent to form a fiber precursor solution, including: taking thermoplastic polyurethane particles and cleaning the oil and pollutants in the thermoplastic polyurethane particles; rinsing the thermoplastic polyurethane particles with an ethanol solution; cleaning the thermoplastic polyurethane particles with deionized water; drying the thermoplastic polyurethane particles; adding the thermoplastic polyurethane particles to a preset solvent, and magnetically stirring the preset solvent with the thermoplastic polyurethane particles until the thermoplastic polyurethane particles are dissolved in the preset solvent to form a fiber precursor solution, wherein the preset solvent is a mixed solution of dimethylformamide and acetone.
[0041] In some embodiments, thermoplastic polyurethane particles are taken; oil and pollutants in the thermoplastic polyurethane particles are cleaned by a detergent; the thermoplastic polyurethane particles are soaked in an ethanol solution for 5 minutes, and then the thermoplastic polyurethane particles are cleaned multiple times with deionized water to remove the ethanol in the thermoplastic polyurethane particles; then, the thermoplastic polyurethane particles are placed in an oven at 50° C. and dried for 5 minutes to complete the pre-cleaning of the thermoplastic polyurethane particles.
[0042] In some embodiments, thermoplastic polyurethane (TPU) particles that meet the standards are added to a mixed solution of dimethylformamide (DMF) and acetone, wherein the volume ratio of dimethylformamide to acetone is 1:1; the preset solvent to which the thermoplastic polyurethane particles are added is magnetically stirred for 8 hours at room temperature, so that the thermoplastic polyurethane particles are dissolved in the preset solvent to form a TPU fiber precursor solution.
[0043] In some embodiments, the relative humidity of the electrospinning environment is 50%, and the ambient temperature of the electrospinning environment is 25°C (degrees Celsius); the voltage of the electrospinning is set to 20 kV (kilowatts), the distance between the tip of the spinneret and the collector is 15 cm (centimeter), the spinneret speed is 3500 r / min (revolutions / minute), the spinning needle diameter is 0.8 mm (millimeter), and the receiving roller is wrapped with aluminum foil.
[0044] In some embodiments, the breaking stress of the fiber membrane material is 30 MPa (megapascal), the breaking strain is 310%, and the average thickness of the fiber membrane material is between 0.05 mm and 0.5 mm.
[0045] Optionally, the fiber membrane raw material is stretched by a stretching clamp to obtain a stretched raw material, including: obtaining the stress points of the fiber membrane raw material, and clamping each stress point by a stretching clamp, wherein the stress points include rectangular vertices and / or rectangular edges of the fiber membrane raw material; applying tension to each stress point of the fiber membrane raw material by the stretching clamp to stretch the fiber membrane raw material to obtain a stretched raw material.
[0046] Optionally, the method also includes at least one of the following: the area ratio between the stretched raw material and the fiber membrane raw material before stretching is greater than or equal to a preset area ratio threshold; if the shape of the fiber membrane raw material is a rectangle, then the side length of the stretched raw material at any rectangular side is greater than or equal to a preset length threshold, wherein the preset length threshold is determined based on the side length of the fiber membrane raw material at the rectangular side before stretching.
[0047] In some embodiments, if the fiber membrane raw material is a square, the four sides of the fiber membrane raw material are used as force points, and each side of the fiber membrane raw material is completely covered and clamped by a clamp.
[0048] In some embodiments, if the fiber membrane raw material is a square and the side length of the fiber membrane raw material is 22 mm, the four vertex corners of the PU fiber membrane are clamped; the direction from the midpoint of the PU fiber membrane to each vertex is used as the stretching direction, and the tensile load method (overload stretching method) is used to apply stress in at least part of the stretching direction, so that the area of the PU fiber membrane is increased by 20%, and the side length of the PU fiber membrane is greater than 25 mm.
[0049] In some embodiments, the tensile loading method is a material mechanics test method, the principle of which is to apply a tensile force to the specimen to cause it to undergo tensile deformation in the vertical direction. The method is based on Hooke's law, that is, the linear relationship between tensile strain and stress. In the elastic stage of the material, stress (applied tensile force divided by the cross-sectional area of the specimen) is proportional to strain (change in length of the specimen divided by the original length).
[0050] In some embodiments, the preset area ratio threshold includes 115% to 130%, for example, the preset area ratio threshold is 120%.
[0051] In some embodiments, the preset length threshold is 1.1 times the length of the rectangular side of the fiber membrane material before stretching.
[0052] In some embodiments, a conductive solution carrying conductive particles is dip-coated on a load surface to use the stretched raw material loaded with conductive particles as a load raw material, including: fixing the stretched raw material on a test bench with tape; sucking the conductive solution with a 1 mL (milliliter) syringe, and injecting the conductive solution into the load surface of the stretched raw material.
[0053] In some embodiments, the conductive particles are nanoparticles, and the conductive nanoparticles include one or more of multi-walled carbon nanotubes, carbon fibers, carbon black, metal nanoparticles, metal powders, metal nanowires, transition metal carbonitrides, and graphene.
[0054] Optionally, the load raw material is dried to obtain the electrode layer raw material, including: removing the stretching clamp set on the load raw material; respectively setting plane clamps on the load surface and external surface of the load raw material, and clamping the load raw material by the plane clamps, wherein the plane clamps are parallel to the load raw material; placing the load raw material in an oven for drying to obtain the electrode layer raw material.
[0055] In some embodiments, the stretching clamp provided on the loading raw material is removed; the outer surface of the loading raw material is laid flat on a flat cardboard, and a layer of flat cardboard is covered on the loading surface of the loading raw material; the two cardboards are clamped with a clamp, and the loading material after being clamped by the cardboard is placed in an oven at 60°C for 1 hour for drying to obtain an electrode layer raw material.
[0056] In some embodiments, the mass proportion of the conductive nanoparticles in the electrode layer material is greater than or equal to 0.8%, the thickness of the electrode layer material is less than or equal to 0.5 mm, and the conductivity is 310 S / m (Siemens / meter).
[0057] Optionally, the sensor dielectric layer is prepared by a fabric material, including: soaking the fabric material in an alcohol solution, wherein the fabric material is formed by directional or random arrangement of textile fibers; after a preset soaking time, cleaning the fabric material by an ultrasonic oscillator; after a preset cleaning time, cleaning the fabric material by deionized water; and drying the cleaned fabric material to obtain the sensor dielectric layer.
[0058] In some embodiments, the fabric raw material is a non-woven fabric having the advantages of low elastic modulus, good air permeability, and low cost; the fabric raw material is made of textile staple fibers or textile filaments that are arranged in a directional or random manner to form a fiber mesh structure, and the longitudinal and transverse lines of the fiber mesh structure are distributed in a disordered manner and the surface is uneven, forming a surface textile microstructure.
[0059] In some embodiments, the fabric material is soaked in 75% alcohol for 5 minutes; then, the fabric material is placed in an ultrasonic oscillator for cleaning for 10 minutes; the fabric material is then cleaned multiple times with deionized water to remove the ethanol in the fabric material; and the fabric material is naturally air-dried to form a sensor dielectric layer.
[0060] Optionally, a flexible sensor is obtained by assembling the sensor electrode layer and the sensor dielectric layer, including: the sensor electrode layer includes a first electrode layer and a second electrode layer; the sensor dielectric layer is sandwiched between the first electrode layer and the second electrode layer, and the sensor dielectric layer contacts the first load surface and the second load surface respectively, wherein the first load surface is the load surface of the first electrode layer, and the second load surface is the load surface of the second electrode layer; wires are connected to each sensor electrode layer by conductive glue, and the sensor electrode layer and the sensor dielectric layer are encapsulated by adhesive to obtain a flexible sensor.
[0061] In some embodiments, the adhesive includes one or more of polydimethylsiloxane, polyurethane glue, and the like.
[0062] In some embodiments, the material of the conductive line includes one or more of copper wire, silver wire, copper foil, and the like.
[0063] In some embodiments, the conductive adhesive includes one or more of conductive silver paste, conductive carbon paste, and the like.
[0064] In some embodiments, the inter-electrode distance between the first electrode layer and the second electrode layer is between 0.5 mm and 2.5 mm.
[0065] Combination Figure 2 As shown, an embodiment of the present disclosure provides a method for preparing a flexible sensor, including: dissolving thermoplastic polyurethane particles in a preset solvent to form a fiber precursor solution; electrospinning the fiber precursor solution to obtain a fiber membrane raw material; setting the fiber membrane raw material in a stretching fixture, and stretching the fiber membrane raw material by the stretching fixture to obtain a stretched raw material; dip-coating a conductive solution carrying conductive particles on a load surface to use the stretched raw material carried with the conductive particles as a load raw material, and drying the load raw material to obtain an electrode layer raw material; preparing a sensor electrode layer based on the electrode layer raw material, and preparing a sensor dielectric layer through a fabric raw material; assembling the sensor electrode layer and the sensor dielectric layer to obtain a flexible sensor.
[0066] The method for preparing a flexible sensor provided by the embodiment of the present disclosure is used to stretch the fiber film raw material by a stretching fixture, inject a conductive solution into the stretched raw material after stretching and dry it, so as to assemble the sensor electrode layer made of the electrode layer raw material and the sensor dielectric layer made of the fabric raw material to obtain a flexible sensor, which has the following advantages:
[0067] First, by stretching the fiber membrane raw material, the gaps between the fibers are effectively enlarged, so that the conductive solution injected later can penetrate deeper into the fiber gaps instead of just staying on the surface, ensuring the uniform distribution and stable connection of the conductive network inside the fiber membrane. Even if the vehicle runs for a long time in a complex environment with humidity, vibration or drastic temperature changes, it can maintain stable conductive performance, significantly improving the conductive stability and durability of the sensor electrode layer, thereby improving the monitoring accuracy of the flexible sensor;
[0068] Second, the materials used in the sensor electrode layer and the sensor dielectric layer have good air permeability, which can ensure the circulation of the internal microenvironment and the external air environment, and are conducive to long-term attachment to the surface of human skin for real-time monitoring of human health detection functions, etc., and are suitable for the production of wearable devices such as electronic skin, which can provide a novel and practical strategy for the large-scale production of fabric-based equipment or textiles;
[0069] Third, the fabric material used in the dielectric layer of the sensor can ensure that the dielectric layer has a low elastic modulus and a large dielectric constant; at the same time, the natural textile microstructure on the surface of the material can significantly increase the sensitivity of the sensor, greatly simplifying the preparation process of traditional microstructures, reducing costs, and greatly improving the ability to detect small strains, such as pulse detection, voice detection, etc.
[0070] Fourth, the sensor electrode layer is prepared by a simple dip-coating process, which is low-cost, high-efficiency, and convenient for large-scale industrial production.
[0071] The embodiment of the present disclosure also provides a flexible sensor, which is manufactured according to the above-mentioned manufacturing method.
[0072] Combination Figure 3 As shown, the sensor dielectric layer is made of fabric, and the sensor dielectric layer is covered with sensor electrode layers on both sides, wherein the sensor electrode layer includes a first electrode layer and a second electrode layer; the first electrode layer and the second electrode layer are arranged opposite to each other, and the load surface of the first electrode layer and the load surface of the second electrode layer respectively contact the sensor dielectric layer, wherein the load surface carries conductive nanoparticles; the sensor electrode layer and the sensor dielectric layer are encapsulated by an adhesive to protect the sensor from the external environment; wires are connected to the first electrode layer and the second electrode layer respectively, and the wires are fixed by conductive glue.
[0073] In some embodiments, when the sensor is loaded with external force, the sensor dielectric layer is compressed, the distance between the two plates decreases, and the output capacitance of the sensor increases; when the external force is released, the sensor dielectric layer rebounds, the distance between the two plates increases, and the sensor capacitance returns to its initial value.
[0074] In some embodiments, the capacitance change of the flexible sensor under different pressures is measured by a digital multimeter to obtain a change curve between capacitance and pressure; after measurement, the pressure measurement range of the flexible sensor includes 0-30kPa (kilopascals), and the sensitivity of the flexible sensor within this pressure measurement range is 1.5kPa-1.
[0075] In some embodiments, the pulse vibration at the human wrist is measured based on the flexible sensor. Figure 4 shown.
[0076] The embodiment of the present disclosure also provides a vehicle terminal, comprising the above-mentioned flexible sensor.
[0077] In some embodiments, the vehicle terminal is a special vehicle, such as a police car, a fire truck, an ambulance, an engineering vehicle, a cleaning vehicle, a hazardous goods transport vehicle, a refrigerated truck, an armored car, a trailer, a postal vehicle, a power engineering vehicle, a road maintenance vehicle, etc.
[0078] In some embodiments, flexible sensors are integrated into components such as seats and steering wheels. These sensors can monitor the driver's sitting posture, body temperature, heart rate and other physiological data in real time. Through data analysis, the system can intelligently adjust the angle and support of the seat to provide a more ergonomic and comfortable experience. At the same time, combined with the temperature sensing function, the flexible sensor can also realize the heating and ventilation functions of the seat, further improving the driver's comfort.
[0079] In some embodiments, flexible sensors can monitor the driver's physiological state, such as heart rate, breathing, etc. in real time. Once an abnormal situation (such as fatigue driving or sudden illness) is detected, the system can respond quickly to ensure the safety of the driver and the vehicle through voice prompts, automatic adjustment of the vehicle status, etc.
[0080] In some embodiments, flexible sensors can also be used in the interactive systems of special vehicles to achieve real-time gesture recognition and touch control functions. The driver can control various functions of the vehicle, such as audio, air conditioning, navigation, etc., simply by simple gestures or touching the sensor surface. This interactive method not only improves the convenience of driving, but also reduces the driver's distraction during driving and improves driving safety.
[0081] In some embodiments, the flexible sensor can also be used in the tire pressure monitoring system of special vehicles. By installing a flexible pressure sensor inside the tire, the pressure change of the tire can be monitored in real time, and an alarm can be issued in time when the pressure is abnormal. This helps to prevent safety hazards caused by insufficient or excessive tire pressure and improve the driving stability and safety of the vehicle.
[0082] In some embodiments, the flexible sensor can be used to monitor the vibration and impact of the vehicle. By analyzing the data collected by the sensor, the system can adjust the parameters of the suspension system in real time to cope with different road conditions and driving conditions, and improve the stability and comfort of the vehicle.
[0083] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent possible changes only. Unless explicitly required, separate components and functions are optional, and the order of operation can be changed. Parts and sub-samples of some embodiments may be included in or replace parts and sub-samples of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of a stated sub-sample, whole, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other sub-samples, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.
[0084] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. Technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. Technicians can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.
[0085] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some sub-samples can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.
[0086] The flowchart and block diagram in the accompanying drawings show the possible architecture, functions and operations of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and a part of the module, program segment or code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.
Claims
1. A method for preparing a flexible sensor, characterized in that: include: Taking a fiber membrane raw material and setting it in a stretching fixture, and stretching the fiber membrane raw material by the stretching fixture to obtain a stretched raw material, wherein the stretched raw material includes a load surface and an external surface; Dip-coating a conductive solution loaded with conductive particles onto the loading surface, using the stretched raw material loaded with the conductive particles as the loading raw material, and drying the loading raw material to obtain an electrode layer raw material; A sensor electrode layer is manufactured according to the electrode layer raw material, and a sensor dielectric layer is manufactured by using a fabric raw material; The sensor electrode layer and the sensor dielectric layer are assembled to obtain a flexible sensor, wherein the load surface of the sensor electrode layer contacts the sensor dielectric layer.
2. The method according to claim 1, characterized in that The fiber membrane raw material is prepared by the following method: Taking thermoplastic polyurethane particles and dissolving them in a preset solvent to form a fiber precursor solution; The fiber precursor solution is subjected to electrostatic spinning to obtain a fiber membrane raw material.
3. The method according to claim 2, characterized in that Thermoplastic polyurethane particles are dissolved in a preset solvent to form a fiber precursor solution, including: Taking thermoplastic polyurethane particles, and cleaning the oil and pollutants in the thermoplastic polyurethane particles; The thermoplastic polyurethane particles are rinsed with an ethanol solution; Washing the thermoplastic polyurethane particles with deionized water; Drying the thermoplastic polyurethane particles; The thermoplastic polyurethane particles are added to a preset solvent, and the preset solvent with the thermoplastic polyurethane particles added is magnetically stirred until the thermoplastic polyurethane particles are dissolved in the preset solvent to form a fiber precursor solution, wherein the preset solvent is a mixed solution of dimethylformamide and acetone.
4. The method according to claim 2, characterized in that: The fiber membrane raw material is stretched by the stretching fixture to obtain a stretched raw material, comprising: Obtaining the stress points of the fiber membrane raw material, and clamping each of the stress points respectively by the stretching clamp, wherein the stress points include rectangular vertices and / or rectangular sides of the fiber membrane raw material; The stretching fixture is used to apply tension to each stress point of the fiber membrane raw material to stretch the fiber membrane raw material to obtain a stretched raw material.
5. The method according to claim 4, characterized in that The method further comprises at least one of the following: The area ratio between the stretched raw material and the fiber membrane raw material before stretching is greater than or equal to a preset area ratio threshold; If the shape of the fiber membrane material is a rectangle, the side length of the stretched material on any rectangular side is greater than or equal to a preset length threshold, wherein the preset length threshold is determined based on the side length of the fiber membrane material on the rectangular side before stretching.
6. The method according to claim 4, characterized in that The loaded raw material is dried to obtain an electrode layer raw material, comprising: removing the stretching fixture disposed on the load material; Plane clamps are respectively arranged on the load surface and the outer surface of the load material, and the load material is clamped by the planar clamps, wherein the planar clamps are parallel to the load material; The loaded raw material is placed in an oven for drying to obtain an electrode layer raw material.
7. The method according to claim 1, characterized in that The sensor dielectric layer is made from textile raw materials, including: Taking a fabric material and soaking it in an alcohol solution, wherein the fabric material is formed by textile fibers being arranged in a directional or random manner; After a preset soaking time, the fabric material is cleaned by an ultrasonic oscillator; After a preset cleaning time, the fabric material is cleaned with deionized water; The cleaned fabric material is dried to obtain a sensor dielectric layer.
8. The method according to any one of claims 1 to 7, characterized in that: The sensor electrode layer and the sensor dielectric layer are assembled to obtain a flexible sensor, including: The sensor electrode layer includes a first electrode layer and a second electrode layer; The sensor dielectric layer is sandwiched between the first electrode layer and the second electrode layer, and the sensor dielectric layer contacts a first load surface and a second load surface respectively, wherein the first load surface is the load surface of the first electrode layer, and the second load surface is the load surface of the second electrode layer; Conductive wires are connected to each of the sensor electrode layers by means of conductive glue, and the sensor electrode layers and the sensor dielectric layers are packaged by means of adhesive to obtain a flexible sensor.
9. A flexible sensor, characterized in that: The flexible sensor is manufactured according to the manufacturing method according to any one of claims 1 to 8.
10. A vehicle terminal, characterized in that: Comprising the flexible sensor as claimed in claim 9.