Power transmission line magnetic field regulation and control module based on multilayer metamaterial structure and preparation method of power transmission line magnetic field regulation and control module

Abstract

The invention relates to the technical field of power transmission lines, in particular to a power transmission line magnetic field regulation and control module based on a multilayer metamaterial structure and a preparation method of the power transmission line magnetic field regulation and control module. The invention discloses a power transmission line magnetic field regulation and control module based on a multilayer metamaterial structure. The power transmission line magnetic field regulation and control module comprises a continuous metal layer, a continuous dielectric layer and a circular resonant ring array layer which are sequentially arranged from bottom to top, the continuous dielectric layer is a polyimide / graphene composite layer; the circular resonance ring array layer is composed of a plurality of circular resonance rings arranged on the continuous dielectric layer. According to the power transmission line magnetic field regulation and control module based on the multilayer metamaterial structure, the magnetic field around the power transmission line can be accurately regulated and controlled, so that the influence of external interference on magnetic field measurement is remarkably reduced. Through the structural design of the magnetic field regulation and control module, electromagnetic waves are reflected and absorbed for multiple times in the magnetic field regulation and control module, accurate regulation and control and efficient absorption of the magnetic field around the power transmission line are achieved, and the accuracy and stability of magnetic field measurement are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission lines, and in particular to a power transmission line magnetic field control module based on a multi-layer metamaterial structure and a preparation method thereof. Background Art

[0002] In the operation and maintenance of power systems, accurate magnetic field detection of transmission lines is crucial. Due to the complexity of the environment around transmission lines, such as nearby power facilities, wireless communication equipment, and lightning activities in the natural environment, electromagnetic waves of various frequencies and intensities are generated. These electromagnetic waves are superimposed on the magnetic field generated by the transmission line itself, forming a complex electromagnetic environment. In such an environment, traditional DC electromagnetic detection methods often have difficulty in accurately distinguishing the magnetic field of the transmission line itself from the magnetic field generated by the interference wave, which greatly reduces the accuracy of the detection results.

[0003] In order to improve the accuracy of transmission line magnetic field detection, effective measures must be taken to suppress or eliminate the influence of these interference waves. In recent years, with the rapid development of metamaterial technology, its application in the field of electromagnetic regulation has become increasingly widespread. Metamaterials can absorb and reflect specific interfering electromagnetic waves through their special structure and electromagnetic parameters, thereby retaining specific required and detectable electromagnetic waves, effectively improving the accuracy of transmission line magnetic field detection and providing more reliable data support for the operation and maintenance of power systems. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and to propose a transmission line magnetic field control module based on a multi-layer metamaterial structure and a preparation method thereof.

[0005] A power transmission line magnetic field control module based on a multi-layer metamaterial structure of the present invention comprises a continuous metal layer, a continuous dielectric layer, and a circular resonant ring array layer arranged in sequence from bottom to top;

[0006] The continuous medium layer is a polyimide / graphene composite layer;

[0007] The circular resonant ring array layer is composed of a plurality of circular resonant rings arranged on the continuous dielectric layer.

[0008] Furthermore, the continuous metal layer is made of one of aluminum, nickel, and aluminum-nickel alloy;

[0009] Furthermore, the circular resonant ring is made of one of aluminum, nickel, and aluminum-nickel alloy.

[0010] Furthermore, the outer diameter of the circular resonant ring is 15 mm, and the inner diameter is 8 mm.

[0011] Furthermore, the circular resonant rings are neatly arranged into n columns and m rows, and n and m are greater than or equal to 2.

[0012] Furthermore, the preparation method of the polyimide / graphene composite layer is to dissolve graphite oxide in an organic solvent system, fully exfoliate the graphite oxide through ultrasonic treatment, then add a polyamic acid solution for blending and stirring to obtain a precursor of the composite material, and finally obtain the graphene / polyimide composite layer through a thermal imidization method.

[0013] Furthermore, the graphene doping mass fraction is 0.1 to 0.5 wt %.

[0014] A method for preparing a power transmission line magnetic field control module based on a multi-layer metamaterial structure as described above comprises the following steps:

[0015] S1. Preparing a continuous metal layer: cleaning the metal sheet and obtaining a uniform and continuous metal layer by electroplating;

[0016] S2, preparing a continuous dielectric layer: selecting a predetermined proportion of graphene and dispersing it in a chloroform organic solvent, ultrasonicating for 15 to 20 minutes to fully exfoliate the graphene, then adding a polyamic acid solution, stirring and mixing fully, coating the solution on the continuous metal layer by a spraying method, and drying to obtain a graphene / polyimide composite layer as a continuous dielectric layer;

[0017] S3. Preparation of a circular resonant ring array layer: First, a stainless steel template with the desired circular pattern is prepared by laser etching technology and is tightly fixed on the continuous dielectric layer; then, an electrochemical deposition method is used to deposit circular metal wires; finally, the stainless steel template is removed by immersion in a dilute hydrochloric acid solution to obtain a circular resonant ring array layer.

[0018] The transmission line magnetic field control module based on the multi-layer metamaterial structure of the present invention can accurately control the magnetic field around the transmission line, thereby significantly reducing the impact of external interference on magnetic field measurement. The structural design of the magnetic field control module enables electromagnetic waves to be reflected and absorbed multiple times inside the magnetic field control module, achieving accurate control and efficient absorption of the magnetic field around the transmission line, and improving the accuracy and stability of magnetic field measurement.

[0019] In the present invention, the bottom continuous metal layer has excellent electrical conductivity, which not only provides a good electromagnetic shielding effect, but also serves as a bottom reflective surface, which helps to enhance the multiple reflections and absorption of electromagnetic waves in the continuous dielectric layer. This design enables the present invention to maintain a high measurement accuracy in a complex electromagnetic environment and enhances electromagnetic compatibility.

[0020] The middle continuous dielectric layer adopts a flexible polyimide / graphene composite material, and the propagation path of the electromagnetic wave is optimized by doping with graphene, thereby improving the wave absorption efficiency. The polyimide material has good mechanical strength and stability, and the addition of graphene further optimizes the propagation path of the electromagnetic wave inside the magnetic field control module, thereby improving the wave absorption efficiency. In order to further improve the wave absorption performance, the present invention can finely adjust the thickness and dielectric constant of the continuous dielectric layer. For example, a multilayer structure design can be adopted, and by superimposing dielectric layers of different thicknesses and dielectric constants, more efficient electromagnetic wave absorption in different frequency bands can be achieved.

[0021] The circular resonant ring array on the top layer has a specific size, shape and arrangement, and can strongly resonate with electromagnetic waves of a specific frequency, thereby effectively absorbing electromagnetic wave energy. The present invention can achieve flexible absorption of electromagnetic waves of different frequencies by adjusting the size, shape and arrangement of the circular resonant ring. This enables the present invention to measure magnetic fields in a wider frequency range and is suitable for different types of transmission lines and electromagnetic environments.

[0022] The invention adopts the method of electrodeposition to prepare the circular resonant ring array, so that the precision is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of magnetic field control of a power transmission line magnetic field control module based on a multi-layer metamaterial structure of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a power transmission line magnetic field control module based on a multi-layer metamaterial structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of a circular resonant ring;

[0026] Figure 4 The broadband absorption performance RL (-dB) and narrowband reflection performance of the magnetic field control module prepared in Example 1;

[0027] Figure 5 The broadband absorption performance RL (-dB) and narrowband reflection performance of the magnetic field control module prepared in Example 2;

[0028] 1. Continuous metal layer; 2. Continuous dielectric layer; 3. Circular resonant ring array layer. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] Example 1

[0031] Preparation of a transmission line magnetic field control module based on a multi-layer metamaterial structure specifically includes the following steps:

[0032] S1. Preparation of continuous metal layer: Aluminum metal sheet (aluminum conductivity is 3.8×10 7 S / m) for cleaning pretreatment, and the aluminum electroplating process is used to obtain a uniform and continuous metal aluminum layer; the electroplating solution is aluminum sulfate 60g / L, and the current density is 1.5A / dm 2 , electroplating time is 8min;

[0033] S2, preparing a continuous dielectric layer: selecting a predetermined proportion of graphene and dispersing it in a chloroform organic solvent, ultrasonicating for 15 to 20 minutes to fully exfoliate the graphene, then adding a polyamic acid solution, stirring and mixing fully, coating the solution on the continuous metal layer by a spraying method, and drying to obtain a graphene / polyimide composite layer as a continuous dielectric layer;

[0034] S3. Preparation of circular resonant ring array layer: Prepare a metal copper wire template with a circular resonant ring array by electrochemical deposition. Specifically, prepare a stainless steel template with the required circular pattern by laser etching technology, and fix it tightly on the continuous dielectric layer, put it into the electrolytic cell, select aluminum sulfate as the electrolyte solution, turn on the power, and the current density is 120mA / cm 2 The deposition time is 15 minutes, and a circular resonant ring is obtained. One side of the circular resonant ring array layer is immersed in 2% dilute hydrochloric acid, and the immersion is repeated for 25 to 30 minutes, and the stainless steel template is removed, thereby obtaining a metal aluminum material layer with a circular resonant ring array layer.

[0035] Get as Figure 2 A transmission line magnetic field control module based on a multi-layer metamaterial structure is shown, with circular resonant rings in 2 columns and 4 rows.

[0036] Among them, the thickness of the continuous metal layer is 5mm

[0037] Among them, Figure 3 As shown, the circular resonant ring is a circular ring, and its outer diameter D1 is 15 mm, and its inner diameter D2 is 8 mm. The thickness of the circular resonant ring array layer is 5 mm.

[0038] The graphene doping mass fraction is 0.1-0.5wt%, the thickness of the continuous dielectric layer is 5mm, and the relative dielectric constant εr is 2.7.

[0039] The applied magnetic field is 0, 50mT, and 120mT. The broadband absorption performance RL (-dB) and narrowband reflection performance of this implementation case are as follows: Figure 4 shown.

[0040] Example 2

[0041] Preparation of a transmission line magnetic field control module based on a multi-layer metamaterial structure specifically includes the following steps:

[0042] S1. Preparation of continuous metal layer: nickel metal sheet (nickel conductivity σ = 1.4 × 10 7 S / m) for cleaning pretreatment, and a uniform and continuous metal nickel layer is obtained by nickel electroplating process; the electroplating solution is 85g / L nickel sulfate and the current density is 1.2A / dm 2 , electroplating time is 8min;

[0043] S2, preparing a continuous dielectric layer: selecting a predetermined proportion of graphene and dispersing it in a chloroform organic solvent, ultrasonicating for 15 to 20 minutes to fully exfoliate the graphene, then adding a polyamic acid solution, stirring and mixing fully, coating the solution on the continuous metal layer by a spraying method, and drying to obtain a graphene / polyimide composite layer as a continuous dielectric layer;

[0044] S3. Preparation of circular resonant ring array layer: Prepare a metal copper wire template with a circular resonant ring array by electrochemical deposition. Specifically, a stainless steel template with the required circular pattern is prepared by laser etching technology, and it is tightly fixed on the continuous dielectric layer, placed in an electrolytic cell, and nickel sulfate is selected as the electrolyte solution. The power is turned on, and the current density is 120mA / cm 2 The deposition time is 15 minutes, and a circular resonant ring is obtained at the circular opening. One side of the circular resonant ring array layer is immersed in 2% dilute hydrochloric acid for 25 to 30 minutes, and the stainless steel template is removed to obtain a metal nickel material layer with a circular resonant ring array layer.

[0045] Among them, the thickness of the continuous metal layer is 10mm

[0046] Among them, Figure 3 As shown, the circular resonant ring is a circular ring, and its outer diameter D1 is 15 mm, and its inner diameter D2 is 8 mm. The thickness of the circular resonant ring array layer is 10 mm.

[0047] The graphene doping mass fraction is 0.1-0.5wt%, the thickness of the continuous dielectric layer is 10mm, and the relative dielectric constant εr is 2.7.

[0048] The applied magnetic field is 0, 50mT, and 120mT. The broadband absorption performance RL (-dB) and narrowband reflection performance of this implementation case are as follows: Figure 5 shown.

[0049] from Figure 4 and Figure 5It can be seen that the transmission line magnetic field control module of the multi-layer metamaterial structure prepared by the present invention has a significant response capability to different magnetic field intensities and has frequency selectivity, and can efficiently control the magnetic field within a specific frequency range.

[0050] For matters not mentioned above, the prior art applies.

[0051] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art to which the present invention belongs may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the present invention or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission line magnetic field control module based on a multi-layer metamaterial structure, characterized in that: It includes a continuous metal layer, a continuous dielectric layer, and a circular resonant ring array layer arranged in sequence from bottom to top; The continuous medium layer is a polyimide / graphene composite layer; The circular resonant ring array layer is composed of a plurality of circular resonant rings arranged on the continuous dielectric layer.

2. A power transmission line magnetic field control module based on a multi-layer metamaterial structure according to claim 1, characterized in that: The continuous metal layer is made of one of aluminum, nickel, and aluminum-nickel alloy.

3. A power transmission line magnetic field control module based on a multi-layer metamaterial structure according to claim 1, characterized in that: The circular resonant ring is made of one of aluminum, nickel, and aluminum-nickel alloy.

4. A power transmission line magnetic field control module based on a multi-layer metamaterial structure as claimed in claim 1, characterized in that: The outer diameter of the circular resonance ring is 15 mm, and the inner diameter is 8 mm.

5. A power transmission line magnetic field control module based on a multi-layer metamaterial structure as claimed in claim 1, characterized in that: The circular resonant rings are neatly arranged into n columns and m rows, where n and m are greater than or equal to 2.

6. A power transmission line magnetic field control module based on a multi-layer metamaterial structure according to claim 1, characterized in that: A transmission line magnetic field control module based on a multilayer metamaterial structure, characterized in that: the preparation method of the polyimide / graphene composite layer is to dissolve graphene in an organic solvent system, fully exfoliate the graphene through ultrasonic treatment, then add a polyamic acid solution for blending and stirring to obtain a precursor of the composite material, and finally obtain the graphene / polyimide composite layer through a thermal imidization method.

7. A power transmission line magnetic field control module based on a multi-layer metamaterial structure according to claim 1, characterized in that: The graphene doping mass fraction is 0.1-0.5wt%.

8. A method for preparing a power transmission line magnetic field control module based on a multi-layer metamaterial structure according to any one of claims 1 to 7, characterized in that: The steps include: S1. Preparing a continuous metal layer: cleaning the metal sheet and obtaining a uniform and continuous metal layer by electroplating; S2, preparing a continuous dielectric layer: selecting a predetermined proportion of graphene and dispersing it in a chloroform organic solvent, ultrasonicating for 15 to 20 minutes to fully exfoliate the graphene, then adding a polyamic acid solution, stirring and mixing fully, coating the solution on the continuous metal layer by a spraying method, and drying to obtain a graphene / polyimide composite layer as a continuous dielectric layer; S3. Preparation of a circular resonant ring array layer: First, a stainless steel template with the desired circular pattern is prepared by laser etching technology and is tightly fixed on the continuous dielectric layer; then, an electrochemical deposition method is used to deposit circular metal wires; finally, the stainless steel template is removed by immersion in a dilute hydrochloric acid solution to obtain a circular resonant ring array layer.

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