A lightweight low-scattering carrier

Abstract

The utility model provides a kind of lightweight low scattering carrier, belong to antenna carrier technical field.It includes basic frame and shell, mouth frame;Basic frame includes front frame, rear frame and middle frame, and front frame and rear frame are six prism platform structure;The bottom frame of front frame and the bottom frame of rear frame are opposite;Mouth frame is located in the upper half area of front frame and rear frame opposite;Middle frame is located in the lower half area of front frame and rear frame opposite;Middle frame is four prism structure, and mouth frame includes rectangular border matched with middle frame, and two trapezoidal frames matched with front frame and rear frame respectively;Trapezoidal frame is located above rectangular border, and is connected at the two ends of rectangular border respectively;Shell covers outside basic frame and covers mouth frame outside.The utility model has the characteristics of high matching precision, high surface smoothness, low weight, high maintainability, and has broad application prospect in airborne equipment stealth test field.

Description

Technical Field

[0001] This utility model relates to the field of antenna carrier technology, specifically a lightweight, low-scattering carrier for antenna RCS testing. Background Technology

[0002] With the development of radar technology, the stealth requirements for airborne antennas are becoming increasingly stringent. Low-scattering carriers are widely used in the stealth testing of airborne antennas, and high-precision low-scattering carriers are essential tools for accurately measuring the antenna's RCS. However, on the one hand, the high precision requirements for the surface of the low-scattering carrier increase processing costs; on the other hand, the carriers for large airborne antennas are generally heavy, which causes inconvenience in transportation and operation during testing. Utility Model Content

[0003] This invention closely addresses the application requirements of low-scattering carriers, providing a low-cost, high-precision, lightweight, and highly maintainable structural design scheme for low-scattering carriers. The aim is to offer a high-precision, lightweight low-scattering carrier structural solution, achieving comprehensive optimization of the carrier in terms of cost, precision, and weight through integrated improvements in structural design, materials, and processes.

[0004] To achieve the above-mentioned technical effects, the present invention adopts the following technical solution:

[0005] A lightweight, low-scattering carrier includes a base frame and an outer shell, and also includes an aperture frame; the base frame includes a front frame, a rear frame and a middle frame, and the front frame and the rear frame are both hexagonal frustum structures.

[0006] The bottom frames of the front frame and the rear frame are directly opposite each other; the opening frame is located in the upper half of the area directly opposite the front and rear frames; the middle frame is located in the lower half of the area directly opposite the front and rear frames.

[0007] The middle frame is a quadrangular prism structure, and the opening frame includes a rectangular border that matches the middle frame, and two trapezoidal frames that match the front frame and the rear frame respectively; the trapezoidal frames are all located above the rectangular border and are respectively connected to the two ends of the rectangular border.

[0008] The outer shell covers the outside of the base frame and encloses the mouth frame.

[0009] Furthermore, the outer shell is 3D printed and formed into multiple curved surfaces, each of which is installed in its corresponding frame position.

[0010] Furthermore, the mouth frame is machined from aluminum alloy.

[0011] Furthermore, the curved surface of the outer shell overlaps the frame and is fixed by adhesive.

[0012] Furthermore, the curved surface is recessed by a certain thickness compared to the theoretical curved surface, sanded and leveled with putty, and then a metal object is brushed onto the smooth curved surface.

[0013] Furthermore, it also includes the front edge and the rear edge of the carrier, which are positioned and glued to the corresponding front frame and rear frame by positioning bosses on them.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) This utility model uses a 3D printed outer shell to replace the metal shell, which significantly reduces the weight of the low-scattering carrier and facilitates testing and handling;

[0016] 2) This utility model adopts a split structure, which processes the antenna frame, the front edge of the carrier, and the rear edge of the carrier separately, thereby improving the maintainability of the low-scatter carrier;

[0017] 3) This utility model mechanically processes the antenna frame of the antenna overlap and grinds and shapes other non-metallic outer surfaces, which improves the smoothness of the overall curved surface while ensuring the surface accuracy of the overlap area.

[0018] This low-scattering carrier features high fitting precision, high surface smoothness, low weight, and high maintainability, and has broad application prospects in the field of stealth testing of airborne equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall low-scattering carrier.

[0020] Figure 2 This is a schematic diagram of the support frame for the low-scattering carrier.

[0021] Figure 3 This is a schematic diagram of the antenna frame.

[0022] Figure 4 This is a schematic diagram of the front frame.

[0023] Figure 5 This is a schematic diagram of the lower front section of the outer shell.

[0024] Figure 6 This is a schematic diagram of the leading edge of the carrier.

[0025] In the figure: 1, front frame; 2, rear frame; 3, antenna frame; 4, middle frame; 5, upper front segment of the outer casing; 6, lower front segment of the outer casing; 7, lower middle segment of the outer casing; 8, upper rear segment of the outer casing; 9, lower rear segment of the outer casing; 10, leading edge of the carrier; 11, trailing edge of the carrier; 12, carrier cover. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Combination Figures 1 to 6 The principle of low-scattering carrier design is as follows:

[0028] The front frame 1, rear frame 2, middle frame 4, and antenna frame 3 are fixed together by screws to form the overall antenna frame, ensuring the strength and rigidity of the carrier. Figure 2 As shown. The antenna frame is machined, with both end faces being the theoretical outer curved surfaces of the carrier, and the middle area being a slotted area for mounting the antenna and carrier cover 12, as shown. Figure 3 As shown;

[0029] The front frame 1, middle frame 2 and rear frame 4 of the carrier are all made of spliced ​​metal sheets.

[0030] The front edge 10 and rear edge 11 of the carrier have relatively complex shapes, require high surface precision, and are easily damaged by bumps during use. Therefore, they are machined separately and positioned by the cooperation of pin holes and positioning bosses with the frame structure.

[0031] The non-metallic outer shell consists of five parts: the upper front section 5, the lower front section 6, the lower middle section 7, the upper rear section 8, and the lower rear section 9. The outer surface of each section is recessed by 0.5mm from its theoretical position. The internal groove fits the shape of the metal frame and is fixed to the outer shell by adhesive.

[0032] After being filled with putty and painted with metallic paint, the non-metallic casing is flush with the outer surfaces of the carrier's leading edge 10, trailing edge 11, and antenna frame 3.

[0033] After the antenna is installed, it fits with the antenna frame 3, with the outer surface flush. The non-metallic areas are coated with metallic paint and then smoothly transition to the metallic areas.

[0034] For the purpose of simplifying the description, the disclosure of technical details in the above-described specific embodiments may only reach the level that a person skilled in the art can determine for themselves. That is, for the technical details not disclosed in the above-described specific embodiments, a person skilled in the art can complete them without any creative effort, with the full guidance of the patented technical solution and with the help of published documents such as textbooks, reference books, papers, patents, and audio-visual products. Alternatively, these details are content that a person skilled in the art can determine for themselves based on the actual situation, according to their common understanding. Therefore, even if these technical details are not disclosed, it will not affect the sufficiency of disclosure of the patented technical solution.

[0035] In summary, based on the interpretative role of the claims in this patent specification, any specific implementation that falls within the scope of the claims of this patent is within the protection scope of this patent.

Claims

1. A lightweight, low-scattering carrier, comprising a basic frame and a shell, characterized in that, It also includes a frame; the basic frame includes a front frame, a rear frame and a middle frame, and the front frame and the rear frame are both hexagonal frustum structures; The bottom frames of the front frame and the rear frame are directly opposite each other; the opening frame is located in the upper half of the area directly opposite the front and rear frames; the middle frame is located in the lower half of the area directly opposite the front and rear frames. The middle frame is a quadrangular prism structure, and the opening frame includes a rectangular border that matches the middle frame, and two trapezoidal frames that match the front frame and the rear frame respectively; the trapezoidal frames are all located above the rectangular border and are respectively connected to the two ends of the rectangular border. The outer shell covers the outside of the base frame and encloses the mouth frame.

2. The lightweight low-scattering carrier according to claim 1, characterized in that, The outer shell is 3D printed and formed into multiple curved surfaces, each of which is installed in its corresponding frame position.

3. The lightweight low-scattering carrier according to claim 1, characterized in that, The mouth frame is machined from aluminum alloy.

4. The lightweight low-scattering carrier according to claim 2, characterized in that, The curved surface of the outer shell overlaps the frame and is fixed by adhesive.

5. A lightweight, low-scattering carrier according to claim 2, characterized in that, The surface is recessed by a certain thickness compared to the theoretical surface, and is sanded and leveled with putty before applying metal to the smooth surface.

6. The lightweight low-scattering carrier according to claim 1, characterized in that, It also includes the front edge and the rear edge of the carrier, which are positioned and glued to the corresponding front and rear frames via positioning bosses.

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