Horizontal w-type continuous adjustable frequency micro selection unit structure based on memory alloy

Abstract

The application relates to a horizontal W-shaped memory alloy-based continuous frequency-selective microelement structure, which comprises a metal surface layer, a supporting seat, a W-shaped memory alloy deformation body, insulation isolation and an L-shaped metal sheet; a plurality of the metal sheets in an array can constitute a frequency-selective surface of electromagnetic waves; the W-shaped memory alloy deformation body is a W-shaped zigzag structure prepared from a memory alloy material. Through the structural design, the frequency-selective surface realizes the continuous frequency-selective function, thereby greatly improving the application range of the frequency-selective surface, providing a coping method for the complex electromagnetic environment faced by ground equipment or airplane radars, and expanding the practicability of the frequency-selective surface.

Description

Technical Field

[0001] This invention relates to the field of aircraft structural design technology, specifically to a horizontal W-shaped continuously tunable frequency-selective micro-unit structure based on shape memory alloy. Background Technology

[0002] Shape memory alloys: alloys that exhibit shape memory effects through thermoelasticity and martensitic phase transformation and its inverse. By changing the temperature, the internal crystal phase of the material can be controlled, thereby allowing the structural geometry to change between two states.

[0003] Frequency selective surface (FSS): A periodic array structure composed of a large number of passive resonant micro-units. By designing the planar geometry and shape of the resonant micro-units, it can exhibit total reflection or total transmission of electromagnetic waves in a specific frequency band. Micro-unit structure: The smallest periodic unit structure of a frequency selective surface.

[0004] Traditional frequency selective surfaces, whose total reflection or total transmission characteristics are limited by the state of the micro-unit structure before leaving the factory, cannot be adjusted during use, which limits their ability to cope with complex and ever-changing operating environments. Summary of the Invention

[0005] Purpose of the invention:

[0006] This invention proposes a vertical V-shaped continuously adjustable frequency-selective microcell structure based on shape memory alloy. Utilizing the geometric deformation characteristics of shape memory alloy with temperature changes, it achieves continuous and real-time adjustment of the operating frequency band of the frequency-selective surface without affecting filtering quality.

[0007] Technical solution:

[0008] A horizontal W-shaped continuously tunable frequency-selective micro-unit structure based on shape memory alloy is proposed, including a metal surface layer, a support base, a W-shaped shape memory alloy deformable body, an insulating barrier, and an L-shaped metal sheet; the array of multiple metal sheets can form a frequency-selective surface for electromagnetic waves; the W-shaped shape memory alloy deformable body is a W-shaped tortuous structure made of shape memory alloy material;

[0009] The metal surface layer is fixedly installed on the upper end face of the support base. The support base has a groove, and the metal surface layer corresponding to the groove has a window. One side of the W-shaped shape memory alloy deformable body is supported at the bottom of the groove. A fixing part is formed in the middle of the W-shaped shape memory alloy deformable body. The fixing part is fixedly connected to the bottom of the groove. Both ends of the W-shaped shape memory alloy deformable body can expand to both ends when heated.

[0010] Each L-shaped metal sheet is divided into a vertical support portion and a horizontal panel portion. The horizontal panel portions of two L-shaped metal sheets overlap and can slide against each other, so that the two L-shaped metal sheets form a metal cover structure that can linearly expand or contract. The W-shaped shape memory alloy deformable body is located inside the metal cover structure, and both ends of the W-shaped shape memory alloy deformable body are fixedly connected to the vertical support portion of one L-shaped metal sheet, so that the W-shaped shape memory alloy deformable body can provide support for the two L-shaped metal sheets. Insulating material is provided between the two ends of the W-shaped shape memory alloy deformable body and the L-shaped metal sheets.

[0011] Furthermore, the metal surface layer is made of the same material as the metal sheet.

[0012] Furthermore, the metal surface layer is made of a different material than the metal sheet.

[0013] Furthermore, the metal sheet is made of copper.

[0014] Furthermore, the support base has a fixed interface, and multiple support bases can be fixed as a whole, so that the metal surface layers on each support frame are arrayed to form a whole.

[0015] Furthermore, the W-shaped shape memory alloy deformable body is fixed to the bottom of the groove by adhesive or snap-fit.

[0016] A horizontal W-shaped continuously tunable frequency-selective microcell structure based on shape memory alloy is also proposed, including a metal surface layer, a support base, a W-shaped shape memory alloy deformable body, an insulating barrier, and an L-shaped metal sheet; the array of multiple said metal sheets can form a frequency-selective surface for electromagnetic waves; the W-shaped shape memory alloy deformable body is a W-shaped tortuous structure made of shape memory alloy material.

[0017] The metal surface layer is fixedly installed on the upper end face of the support base. The support base has multiple grooves arranged in an array, and the metal surface layer corresponding to each groove has a window. Each W-shaped shape memory alloy deformable body corresponds to a groove. One side of the W-shaped shape memory alloy deformable body is supported at the bottom of the groove. A fixing part is formed in the middle of the W-shaped shape memory alloy deformable body. The fixing part is fixedly connected to the bottom of the groove. Both ends of the W-shaped shape memory alloy deformable body can expand to both ends when heated.

[0018] Each L-shaped metal sheet is divided into a vertical support portion and a horizontal panel portion. The horizontal panel portions of each pair of L-shaped metal sheets overlap and can slide against each other, so that each pair of L-shaped metal sheets forms a metal cover structure that can linearly expand or contract. Each W-shaped shape memory alloy deformable body corresponds to a metal cover structure. The W-shaped shape memory alloy deformable body is located inside the metal cover structure, and its two ends are respectively fixedly connected to the vertical support portion of an L-shaped metal sheet, so that the W-shaped shape memory alloy deformable body can provide support for the two L-shaped metal sheets. Insulating material is provided between the two ends of the W-shaped shape memory alloy deformable body and the L-shaped metal sheet.

[0019] See Figure 1 Through repeated stretching training, its angle can be changed with temperature variations, thus enabling controllable deformation of the unit projected area of ​​the adjustable frequency-selective structure. By optimizing the insulation design between the two ends of the W-shaped unit and the metal sheet, the frequency coupling problem of this type of unit structure is eliminated, improving the filtering quality of the frequency-selective unit. The horizontal panel of the metal sheet does not contact the W-shaped wing alloy.

[0020] Shape memory alloys are prepared through high and low temperature cycling training to stabilize the state of the unit structure. The micro-unit structure is heated or cooled by a temperature control device (the flow channel in the support structure or the bottom covering heating plate) so that the continuously adjustable micro-unit structure changes between state 1 and state 2, thereby adjusting the filtering characteristics of the frequency-selective structure.

[0021] Technical effects:

[0022] This invention, through structural design, enables the frequency selective surface to achieve continuous adjustable functionality, thereby greatly improving the applicability of the frequency selective surface and providing a solution for the complex electromagnetic environment faced by ground equipment or aircraft radar, thus expanding the practicality of the frequency selective surface. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the deformation of the micro-unit structure (in the merged state).

[0024] Figure 2 A schematic diagram of the deformation of the micro-unit structure (open state);

[0025] Figure 3 Side view of a continuously adjustable micro-unit;

[0026] Figure 4 This is a schematic diagram of the structure of Example 2;

[0027] Among them: 1-metal sheet, 2-insulating material, 3-W-shaped shape memory alloy deformable body, 4-metal surface layer, 5-support frame. Detailed Implementation

[0028] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1, see appendix Figure 1-2 A horizontal W-shaped continuously tunable frequency-selective micro-unit structure based on shape memory alloy is proposed, comprising a metal surface layer, a support base, a W-shaped shape memory alloy deformable body, an insulating barrier, and an L-shaped metal sheet; the array of multiple metal sheets can form a frequency-selective surface for electromagnetic waves; the W-shaped shape memory alloy deformable body is a W-shaped tortuous structure made of shape memory alloy material.

[0030] The metal surface layer is fixedly installed on the upper end face of the support base. The support base has a groove, and the metal surface layer corresponding to the groove has a window. One side of the W-shaped shape memory alloy deformable body is supported at the bottom of the groove. A fixing part is formed in the middle of the W-shaped shape memory alloy deformable body. The fixing part is fixedly connected to the bottom of the groove. Both ends of the W-shaped shape memory alloy deformable body can expand to both ends when heated.

[0031] Each L-shaped metal sheet is divided into a vertical support portion and a horizontal panel portion. The horizontal panel portions of two L-shaped metal sheets overlap and can slide against each other, so that the two L-shaped metal sheets form a metal cover structure that can linearly expand or contract. The W-shaped shape memory alloy deformable body is located inside the metal cover structure, and both ends of the W-shaped shape memory alloy deformable body are fixedly connected to the vertical support portion of one L-shaped metal sheet, so that the W-shaped shape memory alloy deformable body can provide support for the two L-shaped metal sheets. Insulating material is provided between the two ends of the W-shaped shape memory alloy deformable body and the L-shaped metal sheets.

[0032] The metal surface layer is made of the same material as the metal sheet.

[0033] The metal sheet is made of copper.

[0034] The support base has a fixed interface, and multiple support bases can be fixed as a whole, so that the metal surface layers on each support frame are arrayed to form a whole.

[0035] The W-shaped shape memory alloy deformable body is fixed to the bottom of the tank by adhesive.

[0036] Example 2, see appendix Figure 1-3A horizontal W-shaped continuously tunable frequency-selective micro-unit structure based on shape memory alloy is proposed, comprising a metal surface layer, a support base, a W-shaped shape memory alloy deformable body, an insulating barrier, and an L-shaped metal sheet; the array of multiple metal sheets can form a frequency-selective surface for electromagnetic waves; the W-shaped shape memory alloy deformable body is a W-shaped tortuous structure made of shape memory alloy material.

[0037] The metal surface layer is fixedly installed on the upper end face of the support base. The support base has a groove, and the metal surface layer corresponding to the groove has a window. One side of the W-shaped shape memory alloy deformable body is supported at the bottom of the groove. A fixing part is formed in the middle of the W-shaped shape memory alloy deformable body. The fixing part is fixedly connected to the bottom of the groove. Both ends of the W-shaped shape memory alloy deformable body can expand to both ends when heated.

[0038] Each L-shaped metal sheet is divided into a vertical support portion and a horizontal panel portion. The horizontal panel portions of two L-shaped metal sheets overlap and can slide against each other, so that the two L-shaped metal sheets form a metal cover structure that can linearly expand or contract. The W-shaped shape memory alloy deformable body is located inside the metal cover structure, and both ends of the W-shaped shape memory alloy deformable body are fixedly connected to the vertical support portion of one L-shaped metal sheet, so that the W-shaped shape memory alloy deformable body can provide support for the two L-shaped metal sheets. Insulating material is provided between the two ends of the W-shaped shape memory alloy deformable body and the L-shaped metal sheets.

[0039] The metal surface layer is made of the same material as the metal sheet.

[0040] The metal sheet is made of copper.

[0041] The W-shaped shape memory alloy deformable body is fixed to the bottom of the tank by adhesive.

[0042] The above description is merely a specific embodiment of the present invention, providing a detailed description of the invention. Parts not covered herein are conventional techniques. However, 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 scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A memory alloy based horizontal W-type continuously adjustable frequency micro-separator unit structure, characterized in that: It includes a metal surface layer, a support base, a W-shaped shape memory alloy deformable body, an insulating barrier, and an L-shaped metal sheet; the array of multiple said metal sheets can form a frequency selective surface for electromagnetic waves; the W-shaped shape memory alloy deformable body is a W-shaped tortuous structure made of shape memory alloy material; The metal surface layer is fixedly installed on the upper end face of the support base. The support base has a groove, and the metal surface layer corresponding to the groove has a window. One side of the W-shaped shape memory alloy deformable body is supported at the bottom of the groove. A fixing part is formed in the middle of the W-shaped shape memory alloy deformable body. The fixing part is fixedly connected to the bottom of the groove. Both ends of the W-shaped shape memory alloy deformable body can expand to both ends when heated. Each L-shaped metal sheet includes a vertical support portion and a horizontal panel portion. The horizontal panel portions of two L-shaped metal sheets overlap and can slide against each other, so that the two L-shaped metal sheets form a metal cover structure that can linearly expand or contract. The W-shaped shape memory alloy deformable body is located inside the metal cover structure, and both ends of the W-shaped shape memory alloy deformable body are fixedly connected to the vertical support portion of one L-shaped metal sheet, so that the W-shaped shape memory alloy deformable body can provide support for the two L-shaped metal sheets. An insulating material is provided between the two ends of the W-shaped shape memory alloy deformable body and the L-shaped metal sheets.

2. The memory-shape-alloy-based horizontal W-type continuously adjustable frequency micro-separation unit structure according to claim 1, characterized in that: The metal surface layer is made of the same material as the metal sheet.

3. The horizontal W-type continuously tunable frequency-selective micro-unit structure based on shape memory alloy according to claim 1, characterized in that: The metal surface layer is made of a different material than the metal sheet.

4. The horizontal W-type continuously tunable frequency-selective micro-unit structure based on shape memory alloy according to claim 2 or 3, characterized in that: The metal sheet is made of copper.

5. The horizontal W-type continuously tunable frequency-selective micro-unit structure based on shape memory alloy according to claim 1, characterized in that: The support base has a fixed interface, and multiple support bases can be fixed as a whole, so that the metal surface layers on each support frame are arrayed to form a whole.

6. The horizontal W-type continuously tunable frequency-selective micro-unit structure based on shape memory alloy according to claim 1, characterized in that: The W-shaped shape memory alloy deformable body is fixed to the bottom of the groove by adhesive or clips.

7. A horizontal W-type continuously tunable frequency-selective micro-unit structure based on shape memory alloy, characterized in that: It includes a metal surface layer, a support base, a W-shaped shape memory alloy deformable body, an insulating barrier, and an L-shaped metal sheet; the array of multiple said metal sheets can form a frequency-selective surface for electromagnetic waves; the W-shaped shape memory alloy deformable body is a W-shaped tortuous structure made of shape memory alloy material. The metal surface layer is fixedly installed on the upper end face of the support base. The support base has multiple grooves arranged in an array, and the metal surface layer corresponding to each groove has a window. Each W-shaped shape memory alloy deformable body corresponds to a groove. One side of the W-shaped shape memory alloy deformable body is supported at the bottom of the groove. A fixing part is formed in the middle of the W-shaped shape memory alloy deformable body. The fixing part is fixedly connected to the bottom of the groove. Both ends of the W-shaped shape memory alloy deformable body can expand to both ends when heated. Each L-shaped metal sheet is divided into a vertical support portion and a horizontal panel portion. The horizontal panel portions of each pair of L-shaped metal sheets overlap and can slide against each other, so that each pair of L-shaped metal sheets forms a metal cover structure that can linearly expand or contract. Each W-shaped shape memory alloy deformable body corresponds to a metal cover structure. The W-shaped shape memory alloy deformable body is located inside the metal cover structure, and its two ends are respectively fixedly connected to the vertical support portion of an L-shaped metal sheet, so that the W-shaped shape memory alloy deformable body can provide support for the two L-shaped metal sheets. Insulating material is provided between the two ends of the W-shaped shape memory alloy deformable body and the L-shaped metal sheet.

8. The memory-shape alloy-based horizontal W-type continuously adjustable frequency micro-separator cell structure according to claim 7, characterized in that: The metal surface layer is made of the same material as the metal sheet.

9. The memory-shape alloy-based horizontal W-type continuously adjustable frequency micro-separator cell structure according to claim 7, characterized in that: The metal sheet is made of copper.

10. The memory-shape alloy-based horizontal W-type continuously adjustable frequency micro-separator cell structure according to claim 7, characterized in that: The W-shaped shape memory alloy deformable body is fixed to the bottom of the groove by adhesive or clips.

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