Sensor manufacturing method, sensor, and identification device
By using modified carbon nanofiber-doped elastomers and electrode layers in the sensor, the problem that existing sensors can only acquire a single signal is solved, realizing the acquisition of multimodal pressure signals, reducing energy consumption and maintenance costs, while improving data processing efficiency and environmental adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2023-06-27
- Publication Date
- 2026-04-24
AI Technical Summary
Existing pressure sensors can only acquire a single signal, which leads to the need for multiple sensors to acquire signals in complex environments, increasing energy consumption and equipment maintenance costs.
Modified carbon nanofibers are added to an elastomer to form a doped elastomer, and electrode layers are formed on its upper and lower surfaces. Finally, an encapsulation layer is formed on the surface of the electrode layer away from the doped elastomer to prepare a sensor capable of acquiring multimodal pressure signals.
It enables the acquisition of multi-modal pressure signals by a single sensor, reducing energy consumption and equipment maintenance costs, improving data processing efficiency, and exhibiting better adaptability in harsh environments.
Smart Images
Figure CN116858404B_ABST
Abstract
Description
[Technical Field]
[0001] This invention relates to the field of sensor technology, and in particular to a sensor manufacturing method, a sensor, and an identification device. [Background Technology]
[0002] Most existing pressure sensors acquire single signals. When applied to complex environments, multiple sensors are often needed for composite acquisition, increasing energy consumption and equipment maintenance costs. Therefore, there is an urgent need to develop a single sensor that can acquire multiple moduli, thereby reducing energy consumption and equipment maintenance costs. [Summary of the Invention]
[0003] To address the problem that existing pressure sensors can only acquire a single signal, this invention provides a sensor manufacturing method, a sensor, and an identification device.
[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a sensor fabrication method, comprising the following steps:
[0005] Modified carbon nanofibers were added to an elastomer to obtain a doped elastomer;
[0006] Electrode layers are formed on both the upper and lower surfaces of the doped elastomer.
[0007] A sensor is obtained by forming an encapsulation layer on the surface of the electrode layer away from the doped elastomer.
[0008] Preferably, the modified carbon nanofibers are obtained through the following steps:
[0009] A spinning solution was prepared by mixing polyacrylonitrile powder with N,N-dimethylformamide;
[0010] The spinning solution was subjected to spinning treatment to obtain polyacrylonitrile nanofibers;
[0011] Modified carbon nanofibers are obtained by pre-oxidizing and carbonizing the polyacrylonitrile nanofibers.
[0012] Preferably, the pre-oxidation temperature of the polyacrylonitrile nanofibers is 268-282℃, and the carbonization temperature is 700-1000℃.
[0013] Preferably, the modified carbon nanofibers have a density of 0.84-0.89 g / cm³. 3 .
[0014] Preferably, the doped elastomer is obtained through the following steps:
[0015] The modified carbon nanofibers and DCP are added to the elastomer;
[0016] The doped elastomer is obtained by mixing at a temperature of 60-100℃.
[0017] Preferably, the doped elastomer is obtained through the following steps:
[0018] The elastomer is dissolved using dichloromethane or trichloromethane;
[0019] The dissolved elastomer was mixed with the modified carbon nanofibers and DCP;
[0020] The dichloromethane or trichloromethane is vacuum filtered and then crosslinked and cured using a flat vulcanizing machine to obtain the doped elastomer.
[0021] Preferably, the electrode layer is formed on the doped elastomer using at least one of the processes of sputtering, spraying, printing, electroplating, or deposition.
[0022] Preferably, the encapsulation layer is made of an insulating material.
[0023] To solve the above-mentioned technical problems, the present invention provides another technical solution as follows: a sensor, which is prepared by any of the sensor preparation methods described above.
[0024] To solve the above-mentioned technical problems, the present invention provides another technical solution as follows: an identification device, comprising a display and a sensor as described in claim 9.
[0025] Compared with the prior art, the sensor manufacturing method, sensor, and identification device provided by the present invention have the following beneficial effects:
[0026] 1. A sensor fabrication method provided in this invention includes the following steps: adding modified carbon nanofibers to an elastomer to obtain a doped elastomer; forming electrode layers on both the upper and lower surfaces of the doped elastomer; and forming an encapsulation layer on the surface of the electrode layers away from the doped elastomer to obtain a sensor. The doping of the elastomer with modified carbon nanofibers can internally construct microcapacitors, enabling the sensor to acquire an additional pressure signal, reducing energy consumption and equipment maintenance costs, and improving data processing efficiency.
[0027] 2. The present invention provides a sensor fabrication method in which modified carbon nanofibers are obtained through the following steps: preparing a spinning solution by mixing polyacrylonitrile powder with N,N-dimethylformamide; spinning the spinning solution to obtain polyacrylonitrile nanofibers; and pre-oxidizing and carbonizing the polyacrylonitrile nanofibers to obtain modified carbon nanofibers. The surface of the modified carbon nanofiber material obtained after the above treatment undergoes oxidation, generating C=O functional groups. Furthermore, the originally orderly arranged graphite structure of the carbon fibers becomes disordered after the surface modification treatment, and the surface aggregated structure is destroyed.
[0028] 3. The sensor fabrication method provided in this embodiment of the invention involves obtaining the doped elastomer through the following steps: dissolving the elastomer in dichloromethane or trichloromethane; mixing the dissolved elastomer with modified carbon nanofibers and DCP; vacuum filtering the dichloromethane or trichloromethane; and then cross-linking and curing the mixture using a flat vulcanizing machine to obtain the doped elastomer. The doped elastomer enables integrated measurement of dynamic and static pressure, reducing production and maintenance costs and improving data processing efficiency; simultaneously, the use of elastomer materials allows the sensor to have superior adaptability in harsh environments.
[0029] 4. The sensor fabrication method provided in this embodiment of the invention involves obtaining a doped elastomer through the following steps: adding modified carbon nanofibers and DCP to an elastomer; and mixing them at a temperature of 60-100°C to obtain the doped elastomer. The doped elastomer enables integrated measurement of dynamic and static pressure, reducing production and maintenance costs and improving data processing efficiency; simultaneously, the use of elastomer materials allows the sensor to have better adaptability in harsh environments.
[0030] 5. The sensor fabrication method provided in this embodiment of the invention uses an encapsulation layer made of an insulating material. By using an insulating encapsulation layer to wrap the electrode layer and the doped elastomer, short circuits caused by contact between the electrode layer and external conductive media are prevented, thus avoiding damage to the sensor. This allows the fabricated sensor to adapt to various complex environments.
[0031] 6. The sensor provided in this embodiment of the invention is prepared using any of the sensor preparation methods described above, and has the beneficial effects described in any of the above-mentioned methods, which will not be repeated here.
[0032] 7. An identification device provided in this embodiment of the invention includes a display and a sensor as described above, and has the same beneficial effects as the sensor box described above, which will not be repeated here. [Attached Image Description]
[0033] Figure 1 This is a flowchart of the steps of a sensor fabrication method provided in the first embodiment of the present invention.
[0034] Figure 2 This is a schematic diagram of the sensor structure in a sensor fabrication method provided in the first embodiment of the present invention.
[0035] Figure 3 This is a schematic diagram of the internal structure of the doped elastomer in a sensor fabrication method provided in the first embodiment of the present invention.
[0036] Figure 4 This is a schematic diagram of the internal structure of the doped elastomer under stress in a sensor fabrication method provided in the first embodiment of the present invention.
[0037] Figure 5 This is a flowchart of the steps involved in preparing modified carbon nanofibers in a sensor fabrication method provided in the first embodiment of the present invention.
[0038] Figure 6 This is a flowchart of the steps in the first preparation method of the doped elastomer in a sensor preparation method provided in the first embodiment of the present invention.
[0039] Figure 7 This is a flowchart of the steps in the second preparation method of the doped elastomer in a sensor preparation method provided in the first embodiment of the present invention.
[0040] Figure 8 This is a comparison diagram of the O / C atomic ratio before and after modification of carbon nanofibers in a sensor preparation method provided in the first embodiment of the present invention.
[0041] Explanation of reference numerals in the attached diagram:
[0042] 100. Sensors;
[0043] 1. Encapsulation layer; 2. Electrode layer; 3. Doped elastomer; 31. Electric dipole; 32. Modified carbon nanofiber.
Detailed Implementation Methods
[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0045] In the embodiments provided by this invention, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.
[0046] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to the invention.
[0047] In various embodiments of the present invention, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
[0048] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. It is particularly important to note that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0049] Please see Figures 1 to 4 The first embodiment of the present invention provides a sensor fabrication method, which includes the following steps:
[0050] Step S1: Add modified carbon nanofibers to the elastomer to obtain a doped elastomer;
[0051] Step S2: Form electrode layers on both the upper and lower surfaces of the doped elastomer;
[0052] Step S3: Form an encapsulation layer on the surface of the electrode layer away from the doped elastomer to obtain the sensor.
[0053] Understandably, a doped elastomer 3 is obtained by doping a certain amount of modified carbon nanofibers 32 into a blank elastomer. The doped modified carbon nanofibers 32 construct a microcapacitor inside the elastomer. Specifically, the microcapacitor is composed of two adjacent modified carbon nanofibers 32. Under the action of external force, the electric dipoles 31 inside the doped elastomer 3 orient themselves to generate a piezoelectric signal for measuring dynamic force; at the same time, the doped elastomer 3 undergoes elastic deformation under force, thereby changing the density of its internal modified carbon nanofibers, that is, reducing the distance between adjacent modified carbon nanofibers, which in turn changes the distance between the parallel plates of the microcapacitor, causing a change in the piezoelectric signal for measuring static force.
[0054] Specifically, the elastomers used in step S1 include, but are not limited to, materials with elastic properties such as lactic acid-based elastomers, polyurethane elastomers, styrene elastomers, polyolefin elastomers, or polyamide elastomers. The specific choice can be made according to the actual situation, and no further restrictions are imposed here. It should be understood that elastomers with elastic properties can produce elastic deformation, thereby better reflecting changes in force and making the test results more accurate.
[0055] In a preferred embodiment, in step S1, a lactic acid-based elastomer and modified carbon nanofiber 32 are preferably used to prepare the doped elastomer 3. The sensor 100 made using the above-mentioned doped lactic acid-based piezoelectric elastomer can perform integrated measurement of dynamic and static pressure. When measuring the same modulus data, the number of sensors required can be reduced accordingly, thereby reducing production and maintenance costs and improving data processing efficiency. At the same time, the unique strain recovery properties of the elastomer material also give it better adaptability in harsh environments.
[0056] For further details, please refer to the following: Figure 6 The doped elastomer in step S1 can be obtained through the following steps:
[0057] Step SA11: Add modified carbon nanofibers and DCP to the elastomer;
[0058] Step SA12: Mix at a temperature of 60-100℃ to obtain a doped elastomer.
[0059] In one feasible implementation, the material mixing process in step SA12 employs high-temperature mechanical mixing. Specifically, a blank elastomer is mixed with an appropriate amount of modified carbon nanofiber 32 and 0.01% DCP, and the aforementioned materials are placed in an internal mixer for plasticizing and mixing. The temperature of the internal mixer is adjusted to 80°C and run for 30 minutes. The material processed by the internal mixer is then placed in a flat vulcanizing machine adjusted to 160°C and 10MPa for crosslinking and curing for 10 minutes, finally obtaining the doped elastomer 3.
[0060] For further details, please refer to the following: Figure 7 The doped elastomer in step S1 can be obtained through the following steps:
[0061] Step SB11: Dissolve the elastomer using dichloromethane or trichloromethane;
[0062] Step SB12: Mix the dissolved elastomer with modified carbon nanofibers and DCP;
[0063] Step SB13: Vacuum filter dichloromethane or trichloromethane, then crosslink and cure using a flat vulcanizing machine to obtain the doped elastomer.
[0064] In another feasible implementation, the modified carbon nanofibers 32 are mixed with the elastomer using chemical dissolution mixing. Specifically, a dichloromethane solution or a chloroform solution is used as a solvent to dissolve the blank elastomer. An appropriate amount of modified carbon nanofibers 32 and 0.01% DCP are added to the solution and mixed thoroughly. Then, the dichloromethane or chloroform in the mixed solution is filtered out using a vacuum filtration device. Finally, the mixed material after the dichloromethane or chloroform has been completely filtered out is crosslinked and cured using a flat vulcanizing machine to obtain the desired doped elastomer 3.
[0065] Please refer to the previous document. Figures 2-4 Furthermore, the electrode layer 2 is formed on the doped elastomer 3 using at least one of the following processes: sputtering, spraying, printing, electroplating, or deposition.
[0066] The electrode layer 2 forming process used in this invention is selected from at least one of sputtering, spraying, printing, electroplating, deposition, etc., and can be selected according to specific needs. Although the equipment and raw materials used in different electrode layer 2 forming processes are different, they all belong to conventional electrode layer 2 preparation processes. The equipment, raw materials, process parameters, etc. used in these processes are known to those skilled in the art and will not be described in detail here.
[0067] In one feasible embodiment, an ink is prepared using a doped elastomer 3 as a substrate and Ag as the ink material. This ink is then printed onto the outer surfaces of opposite sides of the doped elastomer 3 to form an electrode pattern. Finally, the printed electrode sample is dried and cured, resulting in a robust electrode layer 2 formed on the surface of the doped elastomer 3. The screen printing electrode fabrication process offers low manufacturing costs, high printing flexibility, and wide applicability, making it suitable for large-scale production. The electrode layer 2 formed using this process is relatively thick, has strong coverage, and good consistency.
[0068] Understandably, the material of electrode layer 2 can be one or more of Ag, Cu, Li, La, Ta, etc., or one or more of their corresponding oxides. The specific material can be selected according to actual needs.
[0069] Furthermore, the encapsulation layer 1 is made of insulating material.
[0070] It should be noted that the encapsulation layer 1 is formed on the outer surface of the electrode layer 2 away from the doped elastomer 3, encapsulating the doped elastomer 3 and the electrode layer 2 inside, so as to prevent the electrode layer 2 from contacting the external conductive medium and thus causing a short circuit that could damage the sensor 100.
[0071] Specifically, the material used for the encapsulation layer 1 can be plastic, PU tape, polyimide, polyethylene terephthalate, polycarbonate, silicone, rubber, etc., as long as it is an insulating material. The specific material can be selected according to the actual situation.
[0072] For further details, please refer to Figure 5 and Figure 8 The modified carbon nanofibers in step S1 can be obtained through the following steps:
[0073] Step S 100: Prepare a spinning solution by mixing polyacrylonitrile powder with N,N-dimethylformamide;
[0074] Step S 200: Spin the spinning solution to obtain polyacrylonitrile nanofibers;
[0075] Step S 300: Pre-oxidize and carbonize polyacrylonitrile nanofibers to obtain modified carbon nanofibers.
[0076] In step S100 above, after adding polyacrylonitrile powder to the N,N-dimethylformamide solution, it needs to be thoroughly stirred to ensure that the polyacrylonitrile powder is fully dissolved in the N,N-dimethylformamide solution to obtain the spinning solution. In this embodiment, the polyacrylonitrile and N,N-dimethylformamide mixed solution is stirred for 24 hours to ensure that it is fully dissolved and mixed, and finally the spinning solution is obtained.
[0077] It should be noted that the spinning process in step S 200 is not limited to electrospinning, meltblown spinning, wet-dry spinning, flash spinning, composite spinning, etc. The specific spinning process used in the actual operation is not too restricted here, as long as the spinning solution can be transformed into the corresponding fiber material.
[0078] In a preferred embodiment, the spinning solution obtained by mixing and stirring polyacrylonitrile powder and N,N-dimethylformamide solution is electrospinned to obtain polyacrylonitrile nanofibers. The obtained polyacrylonitrile nanofibers are then placed in an oven with openings at the top for pre-oxidation treatment. After pre-oxidation, the polyacrylonitrile nanofibers are placed in a tube furnace for carbonization treatment, and finally the modified carbon nanofibers 32 are obtained.
[0079] Specifically, the pre-oxidation temperature of polyacrylonitrile nanofibers is 268-282℃, and the carbonization temperature is 700-1000℃.
[0080] Optionally, the pre-oxidation temperature of polyacrylonitrile nanofibers can be 268℃, 270℃, 272℃, 274℃, 276℃, 278℃, 280℃, or 282℃; and the carbonization temperature can be 700℃, 750℃, 800℃, 850℃, 900℃, 950℃, or 1000℃.
[0081] In a preferred embodiment, it is understood that when the polyacrylonitrile nanofibers undergo pre-oxidation treatment in an oven, the oven temperature should be maintained at 278°C, and the treatment time is preferably 15 minutes. The temperature of the tube furnace should be maintained at 1000°C for carbonization treatment of the polyacrylonitrile nanofibers, and the treatment time is preferably 5 minutes.
[0082] For details, please refer to Figure 8 The density of the modified carbon nanofibers is 0.84-0.89 g / cm³. The density of the modified carbon nanofibers obtained after treatment at different carbonization temperatures remains essentially constant at 0.84-0.89 g / cm³. 3 Within the range of [specific parameters]. Compared to conventional carbon nanofibers, the modified carbon nanofiber material after the above modification treatment has a significantly increased oxygen atom content, i.e., oxidation has occurred, and C=O functional groups have been generated on the surface. Furthermore, the originally regular graphite structure of the carbon fibers becomes disordered with the surface modification treatment, and the surface aggregated structure is destroyed. Therefore, the modified carbon nanofibers provided in this embodiment are not prone to agglomeration. The doped elastomer prepared in this way has relatively dispersed modified carbon nanofibers that dope, without agglomeration, resulting in sensors constructed with this material exhibiting higher sensitivity and accuracy.
[0083] Please continue reading. Figure 2 The second embodiment of the present invention provides a sensor 100, which can be prepared by the sensor preparation method provided in the first embodiment of the present invention.
[0084] In one optional embodiment, the sensor 100 provided by the present invention has an elastomer specifically as a lactic acid-doped piezoelectric elastomer. Electrode layers are printed on the two opposite end faces of the lactic acid-doped piezoelectric elastomer, one end of which is a positive electrode layer and the other end is a negative electrode layer. The outer surface of the combination of the lactic acid-doped piezoelectric elastomer and the electrode layers is covered with insulating PU tape.
[0085] Understandably, the lactic acid-based piezoelectric elastomer is doped with modified carbon nanofiber 32, which is less prone to agglomeration after modification treatment. The sensor provided in this embodiment can measure both dynamic and static pressure in an integrated manner. A single sensor can measure multiple data moduli, reducing energy consumption and equipment production and maintenance costs, improving data processing efficiency, and exhibiting superior adaptability to complex environments.
[0086] A third embodiment of the present invention provides an identification device, which includes a display and a sensor 100 as provided in the second embodiment of the present invention. The display can show the type of data and data measured by the sensor 100, making it convenient for the user to understand and record intuitively. The identification device provided in this embodiment also has the same beneficial effects as the sensor 100 provided in the second embodiment of the present invention, which will not be described again here.
[0087] Compared with the prior art, the sensor manufacturing method, sensor, and identification device provided by the present invention have the following beneficial effects:
[0088] 1. A sensor fabrication method provided in this invention includes the following steps: adding modified carbon nanofibers to an elastomer to obtain a doped elastomer; forming electrode layers on both the upper and lower surfaces of the doped elastomer; and forming an encapsulation layer on the surface of the electrode layers away from the doped elastomer to obtain a sensor. The doping of the elastomer with modified carbon nanofibers can internally construct microcapacitors, enabling the sensor to acquire an additional pressure signal, reducing energy consumption and equipment maintenance costs, and improving data processing efficiency.
[0089] 2. The present invention provides a sensor fabrication method in which modified carbon nanofibers are obtained through the following steps: preparing a spinning solution by mixing polyacrylonitrile powder with N,N-dimethylformamide; spinning the spinning solution to obtain polyacrylonitrile nanofibers; and pre-oxidizing and carbonizing the polyacrylonitrile nanofibers to obtain modified carbon nanofibers. The surface of the modified carbon nanofiber material obtained after the above treatment undergoes oxidation, generating C=O functional groups. Furthermore, the originally orderly arranged graphite structure of the carbon fibers becomes disordered after the surface modification treatment, and the surface aggregated structure is destroyed.
[0090] 3. The sensor fabrication method provided in this embodiment of the invention involves obtaining the doped elastomer through the following steps: dissolving the elastomer in dichloromethane or trichloromethane; mixing the dissolved elastomer with modified carbon nanofibers and DCP; filtering the dichloromethane or trichloromethane under vacuum; and then cross-linking and curing the mixture using a flat vulcanizing machine to obtain the doped elastomer. The doped elastomer enables integrated measurement of dynamic and static pressure, reducing production and maintenance costs and improving data processing efficiency; simultaneously, the use of elastomer materials allows the sensor to have superior adaptability in harsh environments.
[0091] 4. The sensor fabrication method provided in this embodiment of the invention involves obtaining a doped elastomer through the following steps: adding modified carbon nanofibers and DCP to an elastomer; and mixing them at a temperature of 60-100°C to obtain the doped elastomer. The doped elastomer enables integrated measurement of dynamic and static pressure, reducing production and maintenance costs and improving data processing efficiency; simultaneously, the use of elastomer materials allows the sensor to have better adaptability in harsh environments.
[0092] 5. The sensor fabrication method provided in this embodiment of the invention uses an encapsulation layer made of an insulating material. By using an insulating encapsulation layer to wrap the electrode layer and the doped elastomer, short circuits caused by contact between the electrode layer and external conductive media are prevented, thus avoiding damage to the sensor. This allows the fabricated sensor to adapt to various complex environments.
[0093] 6. The sensor provided in this embodiment of the invention is prepared using any of the sensor preparation methods described above, and has the beneficial effects described in any of the above-mentioned methods, which will not be repeated here.
[0094] 7. An identification device provided in this embodiment of the invention includes a display and a sensor as described above, and has the same beneficial effects as the sensor box described above, which will not be repeated here.
[0095] The foregoing has provided a detailed description of a sensor fabrication method, sensor, and identification device disclosed in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention. Any modifications, equivalent substitutions, and improvements made within the principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method for fabricating a sensor, characterized in that: Includes the following steps: Modified carbon nanofibers are added to elastomers to obtain doped elastomers. The doped elastomer is obtained through the following steps: The elastomer is dissolved using dichloromethane or trichloromethane; The dissolved elastomer was mixed with the modified carbon nanofibers and DCP; The doped elastomer is obtained by vacuum filtration of dichloromethane or trichloromethane and then crosslinking and curing it using a flat vulcanizing machine. Electrode layers are formed on both the upper and lower surfaces of the doped elastomer. A sensor is obtained by forming an encapsulation layer on the surface of the electrode layer away from the doped elastomer.
2. The sensor fabrication method according to claim 1, characterized in that: The modified carbon nanofibers are obtained through the following steps: A spinning solution was prepared by mixing polyacrylonitrile powder with N,N-dimethylformamide; The spinning solution was subjected to spinning treatment to obtain polyacrylonitrile nanofibers; Modified carbon nanofibers are obtained by pre-oxidizing and carbonizing the polyacrylonitrile nanofibers.
3. The sensor fabrication method according to claim 2, characterized in that: The pre-oxidation temperature of the polyacrylonitrile nanofibers is 268-282℃, and the carbonization temperature is 700-1000℃.
4. The sensor fabrication method according to claim 1, characterized in that: The modified carbon nanofibers have a density of 0.84-0.89 g / cm³.
5. The sensor fabrication method according to claim 1, characterized in that: The doped elastomer is obtained through the following steps: The modified carbon nanofibers and DCP are added to the elastomer; The doped elastomer is obtained by mixing at a temperature of 60-100℃.
6. The sensor fabrication method according to claim 1, characterized in that: The electrode layer is formed on the doped elastomer using at least one of the following processes: sputtering, spraying, printing, electroplating, or deposition.
7. The sensor fabrication method according to claim 1, characterized in that: The encapsulation layer is made of insulating material.
8. A sensor, characterized in that: It is prepared using the sensor preparation method according to any one of claims 1-7.
9. An identification device, characterized in that: Includes a display and the sensor as described in claim 8.
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