Large-span planar antenna housing containing foam supporting columns and manufacturing method of large-span planar antenna housing

Abstract

The invention provides a large-span planar antenna housing containing foam supporting columns and a manufacturing method thereof, and relates to the technical field of radar antennas. According to the antenna housing, the foam supporting column is additionally arranged in the middle of the housing body to serve as a supporting structure, the rigidity and strength of the antenna housing are improved, collapse and contraction of the antenna housing are reduced, the thickness of the housing body is reduced, the distance between the wall face of the antenna housing and an internal antenna unit is reduced, and therefore the overall section space is reduced, and the space utilization rate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of radar antennas, and in particular to a large-span flat antenna cover containing foam support columns and a manufacturing method thereof. Background Art

[0002] Ground vehicle-mounted electronic equipment is developing towards lightweight and low profile. As a part of radar electronics, the radar antenna cover is generally installed at the front end of the antenna to protect the antenna from natural attacks such as heavy rain, strong wind, ice and snow, dust, solar radiation, salt fog, etc. It is also an electromagnetic window for the antenna to receive and transmit electromagnetic waves.

[0003] Nowadays, the span of the radome is gradually increasing with the increase of the antenna transmission aperture, which can easily cause the radome to deform, causing the radome to collapse and shrink. Generally, the span of a large-span flat radome is 3-5m. In order to ensure that the radome works normally under a certain wind speed without being damaged, the design of the radome in the past often increases the thickness of the radome wall to ensure that the structural strength requirements are met, and increases the safety distance from the antenna unit to ensure that the radome does not contact the antenna unit when deformed.

[0004] However, in order to meet the strength requirements, the existing radome wall thickness is relatively thick and the safety distance from the antenna unit is too large, resulting in poor radar wave transmission performance, occupying more cross-sectional space and low space utilization. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a large-span flat-panel antenna cover containing foam support columns and a method for manufacturing the same, which solves the problem that the large-span flat-panel antenna cover will have poor radar wave transmission performance and low space utilization in order to meet the strength requirements.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A large-span flat-plate antenna cover containing foam support columns, the large-span flat-plate antenna cover comprising: a cover body;

[0008] A plurality of foam support columns are arranged in the middle of the cover body, and the bottom ends of the foam support columns are connected to the antenna base.

[0009] Preferably, the cover body comprises: an interlayer, an inner skin and an outer skin;

[0010] The inner skin and the outer skin are laid on the inner and outer walls of the sandwich respectively;

[0011] The interlayer comprises: a foam skeleton, a foam surrounding frame and a honeycomb layer;

[0012] The top of the foam support column is connected to the foam frame, the foam surrounding frame is arranged on both sides of the foam frame, and the remaining blank area of ​​the interlayer is filled with a honeycomb layer.

[0013] Preferably, the antenna base is provided with guide pins corresponding to the foam support columns one by one; a metal joint is pre-buried at the bottom end of the foam support column, and a trumpet-shaped interface is provided at the bottom end of the metal joint; the guide pin is plugged into the trumpet-shaped interface.

[0014] Preferably, the trumpet-shaped interface comprises: a flared section and a cylindrical section;

[0015] The guide pin is interference-connected with the cylindrical section after being offset-corrected with the flared section.

[0016] Preferably, the antenna base is provided with a connection groove, and the bottom end of the foam support column is accommodated in the connection groove.

[0017] Preferably, a flange is provided at the opening of the cover, and the antenna base is connected to the flange;

[0018] The flange flanging is provided with a lifting threaded hole, and the lifting threaded hole is used to connect the lifting device.

[0019] Preferably, a plurality of guide posts are arranged around the antenna base, and the outer walls of the guide posts are in contact with the inner walls of the cover body to guide the assembly of the cover body and the antenna base.

[0020] Preferably, a wedge-shaped surface is formed on the top end of the guide column.

[0021] Preferably, the guide column is made of tetrafluoroethylene; the foam support column, foam skeleton and foam frame are all made of polymethacrylimide foam.

[0022] A method for manufacturing a large-span flat antenna cover containing foam support columns, the manufacturing method comprising:

[0023] Design the number and position of foam support columns according to the size and stress distribution of the cover;

[0024] After the segmented foam raw materials are glued and formed, the foam skeleton and foam support column are machined into an integrated form according to the design, and a groove for installing the trumpet-shaped interface is machined at the bottom of the foam support column;

[0025] Lay the outer skin in the mold, glue the foam frame on both sides of the foam skeleton and put it into the mold, fill the blank area of ​​the interlayer with the honeycomb layer, and then lay the inner skin to form the cover body;

[0026] After the epoxy plate is glued to the cover body as the flange, the flange hole and the lifting thread hole are processed through the template;

[0027] Install the flared connector into the groove.

[0028] The present invention provides a large-span flat antenna cover with foam support columns and a manufacturing method thereof. Compared with the prior art, the present invention has the following beneficial effects:

[0029] In the present invention, a foam support column is added in the middle of the radome as a supporting structure, which improves the rigidity of the radome, reduces the collapse and shrinkage of the radome, reduces the thickness of the radome, and reduces the distance between the radome wall and the internal antenna unit, thereby reducing the overall cross-sectional space and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic structural diagram of a large-span flat antenna cover in an embodiment of the present invention.

[0032] Figure 2 It is a perspective view of the connection structure between the cover body and the antenna base in an embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of the structure of the foam support column, the foam skeleton and the foam surrounding frame in an embodiment of the present invention.

[0034] Figure 4 It is a schematic diagram of the structure during the assembly process of the cover body and the antenna base in an embodiment of the present invention.

[0035] Figure 5 It is a schematic diagram of the structure in which the cover body and the antenna base are assembled in an embodiment of the present invention.

[0036] Figure 6 It is a schematic diagram of the connection structure between the foam support column and the antenna base in an embodiment of the present invention.

[0037] Figure 7 It is a schematic diagram of the hoisting of a large-span flat antenna cover in an embodiment of the present invention.

[0038] The reference numerals in the figure are set as: cover body 10, foam skeleton 11, foam frame 12, honeycomb layer 13, flange flange 14, lifting threaded hole 15, foam support column 20, metal joint 21, trumpet-shaped interface 22, antenna base 30, guide pin 31, connecting groove 32, guide column 33, wedge surface 34. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The embodiment of the present application solves the problem that a large-span flat-panel antenna cover may have poor radar wave transmission performance and low space utilization due to the lack of strength requirements by providing a large-span flat-panel antenna cover containing foam support columns and a manufacturing method thereof.

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] Example:

[0043] like Figure 1-Figure 7 As shown, the present invention provides a large-span flat-plate antenna cover containing foam support columns, and the large-span flat-plate antenna cover comprises: a cover body 10;

[0044] A plurality of foam support columns 20 are disposed in the middle of the cover body 10 , and the bottom ends of the foam support columns 20 are connected to the antenna base 30 .

[0045] The cover body 10 comprises: an interlayer, an inner skin and an outer skin;

[0046] The inner skin and the outer skin are laid on the inner and outer walls of the sandwich respectively.

[0047] like Figure 1-Figure 3 As shown, the sandwich layer includes: a foam skeleton 11, a foam surrounding frame 12 and a honeycomb layer 13;

[0048] The top of the foam support column 20 is connected to the foam skeleton 11 , the foam surrounding frame 12 is arranged on both sides of the foam skeleton 11 , and the remaining blank area of ​​the interlayer is filled with a honeycomb layer 13 .

[0049] like Figure 6 As shown, the antenna base 30 is provided with guide pins 31 corresponding to the foam support columns 20 one by one; a metal joint 21 is pre-buried at the bottom end of the foam support column 20, and a trumpet-shaped interface 22 is provided at the bottom end of the metal joint 21; the guide pin 31 is plugged into the trumpet-shaped interface 22, which can automatically correct the deviation between the metal joint 21 and the guide pin 31 caused by the deformation of the antenna cover.

[0050] like Figure 6 As shown, the trumpet-shaped interface 22 includes: a flared section and a cylindrical section;

[0051] After the guide pin 31 is offset-corrected with the flared section, it is interference-connected with the cylindrical section, so that the guide pin 31 and the trumpet-shaped interface 22 are tightly plugged in.

[0052] like Figure 6 As shown, the antenna base 30 is provided with a receiving groove 32 , and the bottom end of the foam support column 20 is accommodated in the receiving groove 32 .

[0053] like Figure 1 As shown, a flange 14 is provided at the opening of the cover body 10 , and the antenna base 30 is flange-connected to the flange 14 .

[0054] like Figure 1 , Figure 7 As shown, the flange flange 14 is provided with a lifting threaded hole 15 , and the lifting threaded hole 15 is used to connect a lifting device to facilitate the lifting of the cover body 10 .

[0055] like Figure 2 , Figure 4 , Figure 5 As shown, a plurality of guide posts 33 are arranged around the antenna base 30 , and the outer walls of the guide posts 33 are in contact with the inner walls of the cover body 10 to guide the assembly of the cover body 10 and the antenna base 30 .

[0056] like Figure 2 , Figure 4 , Figure 5 As shown, a wedge-shaped surface 34 is provided at the top of the guide column 33 , which is beneficial to the assembly and traction of the cover body 10 .

[0057] The guide column 33 is made of tetrafluoroethylene, which has a low dielectric constant and has little effect on the antenna unit; and can reduce the wear on the inner wall of the cover body 10 during the assembly process; the foam support column 20, foam skeleton 11 and foam frame 12 are all made of polymethacrylimide foam material.

[0058] The present invention provides a method for manufacturing a large-span flat-plate antenna cover containing foam support columns, the manufacturing method comprising:

[0059] Design the number and position of the foam support columns 20 according to the size and stress distribution of the cover body 10;

[0060] After the segmented foam raw materials are glued and formed, the foam skeleton 11 and the foam support column 20 are machined into an integral shape according to the design, and a groove for installing the trumpet-shaped interface 22 is machined at the bottom end of the foam support column 20;

[0061] Lay the outer skin in the mold, glue the foam frame 12 on both sides of the foam skeleton 11 and put it into the mold, the foam skeleton 11 ensures the position of the foam skeleton 11 in the mold, fills the blank area of ​​the interlayer with the honeycomb layer 13, and then lays the inner skin to form the cover body 10;

[0062] After the epoxy plate is glued to the cover body 10 as the flange 14, the flange hole and the lifting thread hole 15 are processed through the template;

[0063] The flared interface 22 is installed in the groove.

[0064] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0065] 1. In the embodiment of the present invention, the radome has a foam support column 20 as a supporting structure in the middle of the cover body 10, which improves the rigidity of the radome, reduces the collapse and shrinkage of the radome, reduces the thickness of the cover body, and reduces the distance between the wall of the radome and the internal antenna unit, thereby reducing the overall cross-sectional space and improving space utilization.

[0066] 2. In the embodiment of the present invention, a method of integrally forming by foam gluing and then machining is adopted, which improves the processing accuracy of the position size and reduces the processing difficulty.

[0067] 3. In the embodiment of the present invention, during the assembly process of the radome, the auxiliary structural parts guide column 33, guide pin 31 and radome hanger can be used to quickly achieve accurate positioning of the interface size between the radome and the antenna base 30, making the assembly of the radome simpler, faster, safer and more efficient.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-span flat antenna cover with foam support columns, characterized in that: The large-span flat-plate antenna cover comprises: a cover body (10); A plurality of foam support columns (20) are arranged in the middle of the cover body (10), and the bottom ends of the foam support columns (20) are connected to the antenna base (30).

2. The large-span flat-panel antenna cover with foam support columns according to claim 1, characterized in that: The cover body (10) comprises: an interlayer, an inner skin and an outer skin; The inner skin and the outer skin are laid on the inner and outer walls of the sandwich respectively; The interlayer comprises: a foam skeleton (11), a foam surrounding frame (12) and a honeycomb layer (13); The top end of the foam support column (20) is connected to the foam skeleton (11), the foam surrounding frame (12) is arranged on both sides of the foam skeleton (11), and the remaining blank area of ​​the interlayer is filled with a honeycomb layer (13).

3. The large-span flat-panel radome with foam support columns according to claim 1, characterized in that: The antenna base (30) is provided with guide pins (31) corresponding to the foam support columns (20) one by one; a metal joint (21) is pre-buried at the bottom end of the foam support column (20); a trumpet-shaped interface (22) is provided at the bottom end of the metal joint (21); and the guide pins (31) are plugged into the trumpet-shaped interface (22).

4. The large-span flat-plate antenna cover with foam support columns according to claim 3, characterized in that: The trumpet-shaped interface (22) comprises: a flared section and a cylindrical section; The guide pin (31) is interference-connected with the cylindrical section after being offset-corrected with the flared section.

5. The large-span flat-panel radome with foam support columns according to claim 1, characterized in that: The antenna base (30) is provided with a connection groove (32), and the bottom end of the foam support column (20) is accommodated in the connection groove (32).

6. The large-span flat-panel radome with foam support columns according to claim 1, characterized in that: A flange (14) is provided at the opening of the cover body (10), and the antenna base (30) is flange-connected to the flange (14); The flange flange (14) is provided with a lifting threaded hole (15), and the lifting threaded hole (15) is used for connecting a lifting device.

7. The large-span flat-panel radome with foam support columns as claimed in claim 2, characterized in that: A plurality of guide columns (33) are arranged around the antenna base (30), and the outer walls of the guide columns (33) are in contact with the inner walls of the cover body (10) to guide the assembly of the cover body (10) and the antenna base (30).

8. The large-span flat-panel antenna cover with foam support columns according to claim 7, characterized in that: The top end of the guide column (33) is provided with a wedge-shaped surface (34).

9. The large-span flat-panel radome with foam support columns according to claim 7, characterized in that: The guide column (33) is made of tetrafluoroethylene; the foam support column (20), the foam skeleton (11) and the foam surrounding frame (12) are all made of polymethacrylimide foam.

10. A method for manufacturing a large-span flat antenna cover containing foam support columns, characterized in that: The manufacturing method comprises: Designing the number and position of the foam support columns (20) according to the size and stress distribution of the cover body (10); After the segmented foam raw materials are glued and formed, an integrally formed foam skeleton (11) and a foam support column (20) are machined according to the design, and a groove for installing a trumpet-shaped interface (22) is machined at the bottom end of the foam support column (20); Laying the outer skin in the mold, gluing the foam frame (12) on both sides of the foam skeleton (11) and placing it into the mold, filling the blank area of ​​the interlayer with a honeycomb layer (13), and then laying the inner skin to form a cover body (10); After the epoxy plate is used as a flange flange (14) and bonded to the cover body (10), the flange hole and the lifting threaded hole (15) are processed through the template; Install the flared connector (22) into the groove.

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