Magnetic levitation structure based on double-sided superconducting thin film, control method, system and application

Abstract

The application provides a magnetic levitation structure based on double-sided superconducting film, a control method, a system and an application, relates to the technical field of magnetic levitation, and comprises the magnetic levitation structure based on double-sided superconducting film provided by the application, which comprises a suspension force regulation and control unit, a permanent magnet array and a refrigeration unit. The suspension force regulation and control unit comprises double-sided high-temperature superconducting film, a conductive pattern, a printed circuit board and terminal wires. The double-sided high-temperature superconducting film is etched with the conductive pattern on both sides. At least one pair of terminal wires is connected to each side of the double-sided high-temperature superconducting film. The lead of the terminal wire is connected to the conductive pattern, and the lead terminal of the terminal wire is connected to the printed circuit board. The suspension force regulation and control unit is arranged in the magnetic field of the permanent magnet array. The refrigeration unit comprises a container and a cooling medium contained in the container, and the suspension force regulation and control unit is immersed in the cooling medium. The application realizes effective regulation and control of the suspension force of the magnetic levitation structure.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation technology, and more specifically, to a magnetic levitation structure, control method, system, and application based on a double-sided superconducting thin film. Background Technology

[0002] Current magnetic levitation structures primarily employ the stacking of superconducting bulk materials and superconducting tapes to capture magnetic flux, which interacts with permanent magnets to achieve stable levitation. However, the application of superconducting bulk materials in levitation within a unit volume is limited due to factors such as low critical current density, poor thermal stability, low mechanical strength, and limitations in mass and volume. Stacking superconducting tapes achieves levitation force superposition by cutting long tapes, which disrupts the tape's microstructure and may affect levitation performance. Furthermore, current levitation methods using superconducting bulk materials and superconducting tapes lack control over the levitation force, meaning effective levitation force control is not possible. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetic levitation structure, control method, system, and application based on a double-sided superconducting thin film, in order to improve the aforementioned problems. To achieve the above objective, the technical solution adopted by this invention is as follows:

[0004] This application provides a magnetic levitation structure based on a double-sided superconducting thin film, comprising:

[0005] A levitation force control unit includes a double-sided high-temperature superconducting thin film, a conductive pattern, a printed circuit board, and terminal lines. The conductive pattern is etched on both sides of the double-sided high-temperature superconducting thin film. At least one pair of terminal lines are connected to both sides of the double-sided high-temperature superconducting thin film. The leads of the terminal lines are connected to the conductive pattern, and the leads of the terminal lines are connected to the printed circuit board.

[0006] A permanent magnet array, wherein the levitation force control unit is disposed within the magnetic field of the permanent magnet array;

[0007] A refrigeration unit includes a container and a cooling medium contained in the container, wherein the levitation force regulating unit is immersed in the cooling medium.

[0008] Furthermore, the double-sided high-temperature superconducting thin film comprises, from top to bottom, an upper Au layer, an upper CeO2 layer, an upper superconducting layer, a substrate layer, a lower superconducting layer, a lower CeO2 layer, and a lower Au layer.

[0009] Furthermore, the conductive pattern is a flat spiral conductive pattern.

[0010] Furthermore, the double-sided high-temperature superconducting thin film has at least two pairs of terminal lines connected to its front and back sides, wherein at least one pair of terminal lines is connected to the beginning and end of the corresponding conductive pattern, and at least one pair of terminal lines is connected to the parts of the corresponding conductive pattern other than the beginning and end.

[0011] Furthermore, the printed circuit board has a hollowed-out mounting hole, the double-sided high-temperature superconducting thin film is embedded in the mounting hole, and the double-sided high-temperature superconducting thin film is fixed on the printed circuit board by a mounting structure.

[0012] Furthermore, the mounting structure includes mounting nuts and limiting plates. Both sides of the double-sided high-temperature superconducting thin film are limited by the limiting plates, and the two ends of the limiting plates are mounted on the printed circuit board by mounting nuts.

[0013] Furthermore, the lead terminals of the terminal wires are all mounted on the printed circuit board using nuts.

[0014] This application also provides a levitation mode control method for switching levitation modes of a magnetic levitation structure based on a double-sided superconducting thin film, wherein the magnetic levitation structure based on the double-sided superconducting thin film is the aforementioned magnetic levitation structure based on a double-sided superconducting thin film, and the control method includes:

[0015] Switch to zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array to the preset zero-field cold suspension height, and control the terminal wires to be de-energized;

[0016] Switch to field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array to the preset field-cooled levitation height, and de-energize the control terminal line;

[0017] Switch to active single-sided zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array to the preset zero-field cold suspension height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film, and adjust the magnitude of the energized DC current according to the suspension force requirements;

[0018] Switch to active single-sided field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array to the preset field-cooled levitation height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film, and adjust the magnitude of the energized DC current according to the levitation force requirements;

[0019] Switch to active double-sided zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array to the preset zero-field cold suspension height, control the simultaneous energization of a pair of terminal lines on both sides of the double-sided high-temperature superconducting film, and adjust the magnitude and direction of the energized DC current according to the suspension force requirements;

[0020] Switch to active double-sided field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array to the preset field-cooled levitation height, control the simultaneous energization of a pair of terminal lines on both sides of the double-sided high-temperature superconducting thin film, and adjust the magnitude and direction of the energized DC current according to the levitation force requirements.

[0021] This application also provides a magnetic levitation train system, including a track structure, a magnetic levitation train disposed above the track structure, and a magnetic levitation structure. The magnetic levitation structure is the aforementioned magnetic levitation structure based on a double-sided superconducting thin film. The cooling unit and levitation force control unit of the magnetic levitation structure are fixed to the bottom of the magnetic levitation train, and the permanent magnet array of the magnetic levitation structure is laid on the upper surface of the track structure along the track structure direction.

[0022] This application also provides applications of magnetic levitation structures based on double-sided superconducting thin films, which can be applied in the fields of magnetic levitation trains, microwave detection, and aerospace microgravity.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention adjusts the direction and magnitude of the levitation force by switching on and off the positive and negative terminal lines of the double-sided high-temperature superconducting thin film in the levitation force control unit and controlling the magnitude of the current, thereby achieving effective control of the levitation force of the magnetic levitation structure.

[0025] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the magnetic levitation structure based on a double-sided superconducting thin film in this invention.

[0028] Figure 2 This is a schematic diagram of the structure of the double-sided high-temperature superconducting thin film in this invention.

[0029] Figure 3 This is a top view of the levitation force control unit in this invention.

[0030] Figure 4This is a bottom view of the levitation force control unit in this invention.

[0031] The markings in the diagram are as follows: 1. Double-sided high-temperature superconducting thin film; 1-1. Conductive pattern; 2. Upper Au layer; 3. Upper CeO2 layer; 4. Upper superconducting layer; 5. Substrate layer; 6. Lower superconducting layer; 7. Lower CeO2 layer; 8. Lower Au layer; 9. Container; 10. Cooling medium; 11. Permanent magnet array; 12. Printed circuit board; 13. Lead terminal; 14. Lead; 15. Mounting nut; 16. Limiting plate; C1. First input terminal; C2. First output terminal; C3. Second input terminal; C4. Second output terminal. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] This embodiment provides a magnetic levitation structure based on a double-sided superconducting thin film, including:

[0035] A levitation force control unit includes a double-sided high-temperature superconducting thin film 1, a conductive pattern 1-1, a printed circuit board 12, and terminal wires. The conductive pattern 1-1 is etched on both sides of the double-sided high-temperature superconducting thin film 1. At least one pair of terminal wires are connected to both sides of the double-sided high-temperature superconducting thin film 1. The lead wire 14 of the terminal wire is connected to the conductive pattern 1-1, and the lead terminal 13 of the terminal wire is connected to the printed circuit board 12.

[0036] Permanent magnet array 11, wherein the levitation force control unit is disposed within the magnetic field of the permanent magnet array 11;

[0037] The refrigeration unit includes a container 9 and a cooling medium 10 contained in the container 9, and the levitation force regulating unit is immersed in the cooling medium 10.

[0038] The double-sided high-temperature superconducting thin film 1 includes, from top to bottom, an upper Au layer 2, an upper CeO2 layer 3, an upper superconducting layer 4, a substrate layer 5, a lower superconducting layer 6, a lower CeO2 layer 7, and a lower Au layer 8.

[0039] The conductive pattern 1-1 is a flat spiral conductive pattern 1-1.

[0040] The double-sided high-temperature superconducting thin film 1 has at least two pairs of terminal lines connected to its front and back sides, wherein at least one pair of terminal lines is connected to the beginning and end of the corresponding conductive pattern 1-1, and at least one pair of terminal lines is connected to the parts of the corresponding conductive pattern 1-1 other than the beginning and end.

[0041] The printed circuit board 12 has a hollowed-out mounting hole, and the double-sided high-temperature superconducting film 1 is embedded in the mounting hole. The double-sided high-temperature superconducting film 1 is fixed on the printed circuit board 12 by a mounting structure.

[0042] The mounting structure includes mounting nuts 15 and limiting plates 16. Both sides of the double-sided high-temperature superconducting thin film 1 are limited by the limiting plates 16, and the two ends of the limiting plates 16 are mounted on the printed circuit board 12 by mounting nuts 15.

[0043] The lead terminals 13 of the terminal lines are all mounted on the printed circuit board 12 by nuts.

[0044] This embodiment also provides a levitation mode control method for switching levitation modes of a magnetic levitation structure based on a double-sided superconducting thin film. The magnetic levitation structure based on the double-sided superconducting thin film is the aforementioned magnetic levitation structure based on a double-sided superconducting thin film. The control method includes:

[0045] Switch to zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset zero-field cold suspension height, and control the terminal line to be de-energized;

[0046] Switch to field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array 11 to the preset field-cooled levitation height, and control the terminal wires to be de-energized;

[0047] Switch to active single-sided zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset zero-field cold suspension height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film 1, and adjust the magnitude of the energized DC current according to the suspension force requirements.

[0048] Switch to active single-sided field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array 11 to the preset field-cooled levitation height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film 1, and adjust the magnitude of the energized DC current according to the levitation force requirements.

[0049] Switch to active double-sided zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset zero-field cold suspension height, control the two pairs of terminal lines on the front and back sides of the double-sided high-temperature superconducting film 1 to be energized simultaneously, and adjust the magnitude and direction of the energized DC current according to the suspension force requirements.

[0050] Switch to active double-sided field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array 11 to the preset field-cooled levitation height, control the simultaneous energization of a pair of terminal lines on both sides of the double-sided high-temperature superconducting thin film 1, and adjust the magnitude and direction of the energized DC current according to the levitation force requirements.

[0051] This embodiment also provides a magnetic levitation train system, including a magnetic levitation structure, a track structure, and a magnetic levitation train disposed above the track structure. The magnetic levitation structure is the aforementioned magnetic levitation structure based on a double-sided superconducting thin film. The cooling unit and levitation force control unit of the magnetic levitation structure are fixed at the bottom of the magnetic levitation train, and the permanent magnet array 11 of the magnetic levitation structure is laid on the upper surface of the track structure along the track structure direction.

[0052] Applications of magnetic levitation structures based on double-sided superconducting thin films include magnetic levitation trains, microwave detection, and aerospace microgravity.

[0053] like Figure 1 As shown, this embodiment discloses a magnetic levitation structure based on a double-sided superconducting thin film, comprising: a levitation force control unit, which includes a double-sided high-temperature superconducting thin film 1, a conductive pattern 1-1, a printed circuit board 12, and terminal wires. The conductive pattern 1-1 is etched on both sides of the double-sided high-temperature superconducting thin film 1, and at least one pair of terminal wires are connected to both sides of the double-sided high-temperature superconducting thin film 1. Leads 14 of the terminal wires are connected to the conductive pattern 1-1, and leads 13 of the terminal wires are connected to the printed circuit board 12; a permanent magnet array 11, in which the levitation force control unit is disposed; the magnetic field being the magnetic field on the side with the denser magnetic field lines; and a cooling unit, comprising a container 9 and a cooling medium 10 contained in the container 9, wherein the levitation force control unit is immersed in the cooling medium 10. The cooling unit is used to achieve the superconducting effect of the double-sided high-temperature superconducting thin film.

[0054] like Figure 2As shown, the double-sided high-temperature superconducting thin film 1 in this embodiment includes, from top to bottom, an upper Au layer 2, an upper CeO2 layer 3, an upper superconducting layer 4, a substrate layer 5, a lower superconducting layer 6, a lower CeO2 layer 7, and a lower Au layer 8. The substrate layer 5 is preferably made of sapphire, which is more durable and less prone to damage. The double-sided high-temperature superconducting thin film 1 used in this embodiment forms a symmetrical structure, which is beneficial for the stability of the magnetic levitation structure in this application.

[0055] like Figure 3 and Figure 4 As shown, the double-sided high-temperature superconducting thin film 1 has at least two pairs of terminal wires connected to its front and back sides. At least one pair of terminal wires is connected to the beginning and end of the corresponding conductive pattern 1-1, and at least one pair of terminal wires is connected to the portion of the corresponding conductive pattern 1-1 other than the beginning and end. The printed circuit board 12 has recessed mounting holes, and the double-sided high-temperature superconducting thin film 1 is embedded in these holes. The double-sided high-temperature superconducting thin film 1 is fixed to the printed circuit board 12 by a mounting structure. The mounting structure includes mounting nuts 15 and limiting plates 16. Both sides of the double-sided high-temperature superconducting thin film 1 are limited by the limiting plates 16, and both ends of the limiting plates 16 are mounted on the printed circuit board 12 by mounting nuts 15. The lead terminals 13 of the terminal wires are all mounted on the printed circuit board 12 by nuts.

[0056] The mounting hole is preferably located in the center of the printed circuit board 12.

[0057] For example, in this embodiment, a first conductive pattern is etched on the front side of the double-sided high-temperature superconducting thin film 1, and C1 and C2 terminal lines are provided on the front side of the double-sided high-temperature superconducting thin film 1. The leads 14 of the C1 and C2 terminal lines are both connected to the first conductive pattern. The first conductive pattern is a spiral conductive pattern. The lead 14 of C1 is connected to the first end of the outer circle of the first conductive pattern, and the lead 14 of C2 is connected to the tail end of the inner circle of the second conductive pattern. When the C1 and C2 terminal lines are energized, a stable magnetic field with high quality can be generated.

[0058] For example, in this embodiment, a second conductive pattern is etched on the reverse side of the double-sided high-temperature superconducting thin film 1, and C3 and C4 terminal lines are provided on the reverse side of the double-sided high-temperature superconducting thin film 1. The leads 14 of the C3 and C4 terminal lines are connected to the second conductive pattern. The second conductive pattern is a flat spiral conductive pattern. The lead 14 of C3 is connected to the first end of the outer circle of the second conductive pattern, and the lead 14 of C4 is connected to the tail end of the inner circle of the second conductive pattern. When the C3 and C4 terminal lines are in the state of direct current, a stable magnetic field with high quality can be generated.

[0059] The following description further illustrates the invention through the switching of the working mode of the magnetic levitation structure based on double-sided superconducting thin films:

[0060] This embodiment also provides a levitation mode control method for switching levitation modes of a magnetic levitation structure based on a double-sided superconducting thin film. The magnetic levitation structure based on the double-sided superconducting thin film is the aforementioned magnetic levitation structure based on a double-sided superconducting thin film. The control method includes:

[0061] Switch to zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset zero-field cold suspension height, and control all terminal lines to be de-energized. The preset zero-field cold suspension height is 60mm above the surface of the permanent magnet array.

[0062] Switch to field cooling suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset field cooling suspension height, and control all terminal lines to be de-energized. The preset field cooling suspension height is 30mm above the surface of the permanent magnet array.

[0063] Switch to active single-sided zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset zero-field cold suspension height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film 1, and adjust the magnitude of the energized DC current according to the suspension force requirements. The preset zero-field cold suspension height is 60mm above the surface of the permanent magnet array.

[0064] Switch to active single-sided field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array 11 to the preset field-cooled levitation height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film 1, and adjust the magnitude of the energized DC current according to the levitation force requirements. The preset field-cooled levitation height is 30mm above the surface of the permanent magnet array.

[0065] Switch to active double-sided zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array 11 to the preset zero-field cold suspension height, control the two pairs of terminal lines on the front and back sides of the double-sided high-temperature superconducting film 1 to be energized simultaneously, and adjust the magnitude and direction of the energized DC current according to the suspension force requirements. The preset zero-field cold suspension height is 60mm above the surface of the permanent magnet array.

[0066] Switch to active double-sided field-cooled levitation mode: Adjust the height of the levitation force control unit above the permanent magnet array 11 to the preset field-cooled levitation height, control the two pairs of terminal lines on the front and back sides of the double-sided high-temperature superconducting film 1 to be energized simultaneously, and adjust the magnitude and direction of the energized DC current according to the levitation force requirements. The preset field-cooled levitation height is 30mm above the surface of the permanent magnet array.

[0067] In addition, terminal lines can be added to connect to the printed circuit board and conductive patterns at positions other than the beginning and end. This allows for different magnetic field superposition effects to be achieved according to actual magnetic field requirements. When the terminal lines at both ends of the conductive pattern on the double-sided high-temperature superconducting thin film 1 are energized, the excitation magnetic field distributed along the entire flat spiral conductive pattern can be superimposed with the magnetic field generated by the double-sided high-temperature superconducting thin film itself. When only a segment of the conductive pattern's terminal lines on the double-sided high-temperature superconducting thin film 1 is energized, the generated magnetic field is the superposition of the excitation magnetic field distributed along that segment and the magnetic field generated by the double-sided high-temperature superconducting thin film itself. When all terminal lines are disconnected, only the double-sided high-temperature superconducting thin film itself generates a magnetic field. This further enriches the levitation modes.

[0068] In practical applications, the magnetic levitation structure based on double-sided superconducting thin films of this invention can be used on maglev trains. During installation, the cooling unit and levitation force control unit of the magnetic levitation structure are fixed to the bottom of the maglev train, and the permanent magnet array 11 of the magnetic levitation structure is laid along the track structure direction on the upper surface of the track structure, thereby adjusting the vertical force. The magnetic levitation structure based on double-sided superconducting thin films of this invention can also be used in other structures or fields requiring adjustment of the levitation force between two structures, such as magnetic levitation radial bearings and microgravity vibration isolation applications.

[0069] Compared with the prior art, the present invention has the following advantages:

[0070] 1. The critical current density of double-sided high-temperature superconducting thin films can reach MA / cm². 2 The magnitude is far greater than that of superconducting bulk materials and superconducting tapes, and it is lightweight and small in volume, which can generate a large levitation force per unit volume and mass.

[0071] 2. The double-sided high-temperature superconducting thin film does not damage the microstructure of the superconductor, thus ensuring stable suspension performance;

[0072] 3. By dynamically controlling the suspension working mode, the magnitude and direction of the current applied to the double-sided high-temperature superconducting thin film, it can operate in different modes to meet the needs of different suspension forces.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A magnetic levitation structure based on a double-sided superconducting thin film, characterized in that, include: The levitation force control unit includes a double-sided high-temperature superconducting thin film (1), a conductive pattern (1-1), a printed circuit board (12), and terminal wires. The conductive pattern (1-1) is etched on both sides of the double-sided high-temperature superconducting thin film (1). At least one pair of terminal wires are connected to both sides of the double-sided high-temperature superconducting thin film (1). The lead wire (14) of the terminal wire is connected to the conductive pattern (1-1), and the lead terminal (13) of the terminal wire is connected to the printed circuit board (12). A permanent magnet array (11), wherein the levitation force control unit is disposed within the magnetic field of the permanent magnet array (11); The refrigeration unit includes a container (9) and a cooling medium (10) contained in the container (9), and the levitation force regulating unit is immersed in the cooling medium (10); The double-sided high-temperature superconducting thin film (1) includes an upper Au layer (2), an upper CeO2 layer (3), an upper superconducting layer (4), a substrate layer (5), a lower superconducting layer (6), a lower CeO2 layer (7), and a lower Au layer (8) arranged sequentially from top to bottom. The conductive pattern (1-1) is a flat spiral conductive pattern; The double-sided high-temperature superconducting thin film (1) has at least two pairs of terminal lines on its front / back sides, wherein at least one pair of terminal lines is connected to the beginning and end of the corresponding conductive pattern (1-1), and at least one pair of terminal lines is connected to the parts of the corresponding conductive pattern (1-1) other than the beginning and end.

2. The magnetic levitation structure based on a double-sided superconducting thin film according to claim 1, characterized in that, The printed circuit board (12) has a hollowed-out mounting hole, and the double-sided high-temperature superconducting film (1) is embedded in the mounting hole. The double-sided high-temperature superconducting film (1) is fixed on the printed circuit board (12) by the mounting structure.

3. The magnetic levitation structure based on a double-sided superconducting thin film according to claim 2, characterized in that, The mounting structure includes mounting nuts (15) and limiting plates (16). Both sides of the double-sided high-temperature superconducting thin film (1) are limited by the limiting plates (16). The two ends of the limiting plates (16) are mounted on the printed circuit board (12) by mounting nuts (15).

4. The magnetic levitation structure based on a double-sided superconducting thin film according to claim 1, characterized in that, The lead terminals (13) of the terminal lines are all mounted on the printed circuit board (12) by nuts.

5. A suspension mode control method, characterized in that, A levitation mode switching control is performed on a magnetic levitation structure based on a double-sided superconducting thin film, wherein the magnetic levitation structure based on the double-sided superconducting thin film is the magnetic levitation structure based on a double-sided superconducting thin film as described in any one of claims 1-4, and the control method includes: Switch to zero-field cold suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array (11) to the preset zero-field cold suspension height, and control the terminal line to be de-energized; Switch to field cooling suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array (11) to the preset field cooling suspension height, and control the terminal wires to be de-energized; Switch to active single-sided zero-field cold suspension mode: adjust the height of the suspension force control unit above the permanent magnet array (11) to the preset zero-field cold suspension height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film (1), and adjust the magnitude of the energized DC current according to the suspension force requirements; Switch to active single-sided field-cooled suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array (11) to the preset field-cooled suspension height, control the energization of a pair of terminal lines on one side of the double-sided high-temperature superconducting thin film (1), and adjust the magnitude of the energized DC current according to the suspension force requirements; Switch to active double-sided zero-field cold suspension mode: adjust the height of the suspension force control unit above the permanent magnet array (11) to the preset zero-field cold suspension height, control the two pairs of terminal lines on the front and back sides of the double-sided high-temperature superconducting film (1) to be energized at the same time, and adjust the magnitude and direction of the energized DC current according to the suspension force requirements; Switch to active double-sided field-cooled suspension mode: Adjust the height of the suspension force control unit above the permanent magnet array (11) to the preset field-cooled suspension height, control the two pairs of terminal lines on the front and back sides of the double-sided high-temperature superconducting film (1) to be energized simultaneously, and adjust the magnitude and direction of the energized DC current according to the suspension force requirements.

6. A magnetic levitation train system, characterized in that, It includes a magnetic levitation structure, a track structure and a magnetic levitation train disposed above the track structure. The magnetic levitation structure is the magnetic levitation structure based on a double-sided superconducting thin film as described in any one of claims 1-4. The cooling unit and levitation force control unit of the magnetic levitation structure are fixed at the bottom of the magnetic levitation train. The permanent magnet array (11) of the magnetic levitation structure is laid on the upper surface of the track structure along the track structure direction.

7. Application of magnetic levitation structure based on double-sided superconducting thin film, characterized in that, The magnetic levitation structure based on double-sided superconducting thin film as described in any one of claims 1-4 can be applied in the fields of magnetic levitation trains, microwave detection, and aerospace microgravity.

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