CN109273862B - Carbon fiber parabolic antenna and focusing assembly method thereof - Google Patents
Carbon fiber parabolic antenna and focusing assembly method thereof Download PDFInfo
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- CN109273862B CN109273862B CN201811013004.8A CN201811013004A CN109273862B CN 109273862 B CN109273862 B CN 109273862B CN 201811013004 A CN201811013004 A CN 201811013004A CN 109273862 B CN109273862 B CN 109273862B
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- reflecting surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
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- Aerials With Secondary Devices (AREA)
Abstract
The invention provides a focusing assembly method of a carbon fiber parabolic antenna, which comprises the following steps: coarse focusing step: carrying out initial focusing assembly on the main reflecting surface, the auxiliary reflecting surface, the feed source bracket and the support rod by adopting a focusing assembly tool; a precise focusing step: measuring the main reflecting surface and the auxiliary reflecting surface by using a laser tracker, and finely adjusting the main reflecting surface and the auxiliary reflecting surface according to the actual measurement result of the laser tracker; and (3) fastening and assembling: and (3) fastening and assembling the following parts by using the fastening piece: between the main reflecting surface and the supporting rod; between the sub-reflecting surface and the supporting rod; between the feed source support and the main reflecting surface. Correspondingly, the invention further provides the carbon fiber parabolic antenna. According to the invention, the focusing time can be greatly shortened by designing the focusing assembly tool for rough focusing, the production efficiency is improved, and accurate focusing is carried out by adopting the auxiliary measurement of the laser tracker, so that the processing precision of the assembly tool is greatly reduced, and the processing cost of the tool is reduced.
Description
Technical Field
The invention relates to antenna assembly, in particular to a carbon fiber parabolic antenna and a focusing assembly method thereof, and particularly relates to a high-precision carbon fiber parabolic antenna and a focusing assembly method thereof.
Background
Compared with metal materials, the carbon fiber composite material (CFC) has the characteristics of low density, extremely small linear expansion coefficient, high specific strength and specific modulus, good designability of physical and mechanical properties and the like, and is proved to be an ideal antenna structure material in the aerospace field.
The double-reflector curved antenna in the satellite-borne antenna is a common antenna structure and typically comprises a main reflecting surface, an auxiliary reflecting surface, a supporting rod and a feed source array. When the focal points of the main reflecting surface and the auxiliary reflecting surface are superposed, the structure can greatly enhance the electromagnetic wave signals and achieve an ideal reflecting effect. However, the carbon fiber reflecting surface has no reference, and focusing assembly of the main-auxiliary reflecting surface antenna is always a hotspot of research and is also a difficult point.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a carbon fiber parabolic antenna and a focusing assembly method thereof.
The invention provides a carbon fiber parabolic antenna focusing assembly method, which comprises the following steps:
coarse focusing step: carrying out initial focusing assembly on the main reflecting surface, the auxiliary reflecting surface, the feed source bracket and the support rod by adopting a focusing assembly tool;
a precise focusing step: measuring the main reflecting surface and the auxiliary reflecting surface by using a laser tracker, and finely adjusting the main reflecting surface and the auxiliary reflecting surface according to the actual measurement result of the laser tracker;
and (3) fastening and assembling: and (3) fastening and assembling the following parts by using the fastening piece:
-between the main reflecting surface and the supporting bar;
-between the subreflector and the support rods;
-between the feed support and the primary reflecting surface.
Preferably, the coarse focusing step comprises the steps of:
setting an initial reference of a reflecting surface: reserving a reference on the main reflecting surface and the auxiliary reflecting surface;
a tool setting step: designing a focusing assembly tool, and reserving a reference on one or more gluing assembly tools.
Preferably, the reflecting surface initial reference setting step includes the steps of:
setting an initial reference of a main reflecting surface: arranging a centering pin in a threaded hole on a central carbon ring embedded in the main reflecting surface, and taking the centering pin as an initial reference of the main reflecting surface;
setting an initial reference of the subreflector: the bottom of the outer ring of the sub-reflecting surface is locally thickened by carbon cloth, the roundness of the outer ring of the sub-reflecting surface and the relation between the outer ring of the sub-reflecting surface and the axis of the sub-reflecting surface are guaranteed by machining, and the thickened outer ring of the sub-reflecting surface is used as the initial reference of the sub-reflecting surface.
Preferably, the tool setting step includes the steps of:
a bottom plate setting step: arranging a bottom plate, wherein the bottom plate can level the back rib of the main reflecting surface at an angle of 1.95 degrees;
the auxiliary reverse positioning plate setting step: and an auxiliary reverse positioning plate is arranged, and a standard block and a standard hole are reserved on the auxiliary reverse positioning plate.
Preferably, in the coarse focusing step, focusing is initially carried out until the deviation in the X direction is 0.3-5 mm and the deviation in the Y direction is 0.3-5 mm;
in the accurate focusing step, the X-direction deviation is 0.01-1 mm, and the Y-direction deviation is 0.01-1 mm.
Preferably, in the step of accurate focusing, the sub-reflecting surface is finely adjusted for multiple times by using an actual measurement result of the laser tracker, and accurate focusing assembly between the main reflecting surface and the sub-reflecting surface is completed by using an iteration method.
Preferably, in the fastening assembly step, the fastening members are connected by gluing, and glue is filled in gaps of the fastening members.
The invention also provides a carbon fiber parabolic antenna capable of realizing the steps in the carbon fiber parabolic antenna focusing assembly method, which comprises a main reflecting surface, an auxiliary reflecting surface, a feed source bracket and a supporting rod;
the main reflecting surface is connected with the auxiliary reflecting surface through one or more supporting rods, and the feed source support is arranged at a central carbon ring on the main reflecting surface.
Preferably, the main reflecting surface is a carbon skin honeycomb sandwich structure, and carbon fibers used by carbon skins contained in the carbon skin honeycomb sandwich structure are high-modulus carbon fibers; the main reflecting surface is manufactured by a method of heating, pressurizing, curing and molding by an autoclave;
the material of the auxiliary reflecting surface is a composite material of high-strength carbon fiber and resin, and the auxiliary reflecting surface is prepared by a mould pressing curing forming method;
the feed source support and the support rod are both made of high-strength carbon fiber and resin composite materials and are both manufactured by a hot-pressing tank heating, pressurizing, curing and molding method.
Compared with the prior art, the invention has the following beneficial effects:
1. the focusing assembly tool is designed to perform coarse focusing, so that the focusing time can be greatly shortened, and the production efficiency is improved;
2. the laser tracker is adopted for assisting in measurement to carry out accurate focusing, so that the machining precision of the assembly tool is greatly reduced, and the machining cost of the tool is reduced;
3. the fastener adopts a gluing mode, and the glue solution is used for filling the gap, so that the internal stress is reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of a carbon fiber parabolic antenna provided by the present invention.
Fig. 2 is a diagram of a positional relationship between the focusing assembly tool and the main/sub reflecting surface provided by the present invention.
The figures show that: a main reflection surface 1; a sub-reflecting surface 2; a feed source support 3; a support rod 4; a bottom plate 5; and a secondary back positioning plate 6.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, the carbon fiber parabolic antenna provided by the present invention includes a main reflective surface 1, an auxiliary reflective surface 2, a feed source support 3 and support rods 4, wherein the main reflective surface 1 and the auxiliary reflective surface 2 are connected through one or more support rods 4, and the feed source support 3 is installed at a central carbon ring on the main reflective surface 1. Preferably, the main reflecting surface 1 is a carbon skin honeycomb sandwich structure, and carbon fibers used by carbon skins contained in the carbon skin honeycomb sandwich structure are high-modulus carbon fibers; the main reflecting surface 1 is manufactured by a method of heating, pressurizing, curing and molding by an autoclave; the material of the auxiliary reflecting surface 2 is a composite material of high-strength carbon fiber and resin, and the auxiliary reflecting surface 2 is manufactured by a mould pressing curing forming method; the feed source support 3 and the support rod 4 are both made of high-strength carbon fiber and resin composite materials, and the feed source support 3 and the support rod 4 are both manufactured by a hot-pressing tank heating, pressurizing, curing and forming method.
The invention provides a focusing assembly method of a carbon fiber parabolic antenna, which comprises the following steps:
coarse focusing step: carrying out initial focusing assembly on the main reflecting surface 1, the auxiliary reflecting surface 2, the feed source support 3 and the support rod 4 by adopting a focusing assembly tool; a precise focusing step: measuring the main reflecting surface 1 and the auxiliary reflecting surface 2 by using a laser tracker, and finely adjusting the main reflecting surface 1 and the auxiliary reflecting surface 2 according to the actual measurement result of the laser tracker; and (3) fastening and assembling: and (3) fastening and assembling the following parts by using the fastening piece: between the main reflecting surface 1 and the supporting rod 4; between the sub-reflecting surface 2 and the supporting rod 4; between the feed source support 3 and the main reflecting surface 1.
Preferably, the coarse focusing step comprises the steps of: setting an initial reference of a reflecting surface: reserving a reference on the main reflecting surface 1 and the auxiliary reflecting surface 2; a tool setting step: designing a focusing assembly tool, and reserving a reference on one or more gluing assembly tools. The step of setting the initial reference of the reflecting surface comprises the following steps: setting an initial reference of a main reflecting surface: arranging a centering pin in a threaded hole on a central carbon ring embedded in the main reflecting surface 1, and taking the centering pin as an initial reference of the main reflecting surface 1; setting an initial reference of the subreflector: the bottom of the outer ring of the sub-reflecting surface 2 is locally thickened by carbon cloth, the roundness of the outer ring of the sub-reflecting surface 2 and the relation between the outer ring of the sub-reflecting surface 2 and the axis of the sub-reflecting surface 2 are ensured by machining, and the thickened outer ring of the sub-reflecting surface 2 is used as the initial reference of the sub-reflecting surface 2. The tool setting step comprises the following steps: a bottom plate setting step: a bottom plate 5 is arranged, and the bottom plate 5 can level the back rib of the main reflecting surface 1 at an angle of 1.95 degrees; the auxiliary reverse positioning plate setting step: an auxiliary reverse positioning plate 6 is arranged, and a standard block and a standard hole are reserved on the auxiliary reverse positioning plate 6.
Preferably, in the coarse focusing step, focusing is initially carried out until the deviation in the X direction is 0.3-5 mm and the deviation in the Y direction is 0.3-5 mm; in the accurate focusing step, the X-direction deviation is 0.01-1 mm, and the Y-direction deviation is 0.01-1 mm. In the accurate focusing step, the auxiliary reflecting surface 2 is finely adjusted for multiple times by adopting the actual measurement result of the laser tracker, and the accurate focusing assembly between the main reflecting surface 1 and the auxiliary reflecting surface 2 is completed by adopting a step-by-step iteration mode. Preferably, in the fastening assembly step, the fastening members are connected in an adhesive manner, and glue is filled in gaps of the fastening members to reduce internal stress.
Preferred embodiments:
the carbon fiber parabolic antenna focusing assembly method comprises the following steps:
step 1: designing a centering pin, and taking a threaded hole on an embedded central carbon ring on the main reflecting surface 1 as an initial reference of the main reflecting surface 1;
step 2: the bottom of the outer ring of the sub-reflecting surface 2 is locally thickened by carbon cloth, and the roundness of the outer ring and the relation with the axis of the sub-reflecting surface 2 are ensured by machining and serve as initial references;
and step 3: a bottom plate 5 designed by the glue joint assembly tool balances the 1.95-degree angle of a back rib of a main reflecting surface 1, and 3 reference blocks and 3 reference holes are reserved on an auxiliary reverse positioning plate 6 and are used as references for subsequent focusing assembly;
and 4, step 4: initially focusing the main-auxiliary reflecting surface 2 by using a glue joint assembly tool; the focus is initially adjusted to 0.5mm deviation in the X direction and 0.5mm deviation in the Y direction.
And 5: on the basis of initial focusing, a laser tracker is adopted to measure the main-auxiliary reflecting surface 2, the auxiliary reflecting surface 2 is finely adjusted according to actual measurement data, and finally the accurate focusing is carried out until the X-direction deviation is less than or equal to 0.05mm and the Y-direction deviation is less than or equal to 0.05 mm.
Step 6: after the precise focusing is finished, the main-auxiliary reflecting surface 2 is connected through the supporting rod 4 by adopting a fastener.
And 7: and a fastening piece is adopted to connect the feed source support 3 with the main reflecting surface 1.
The main reflecting surface 1 is a carbon skin honeycomb sandwich structure, the thickness of the main reflecting surface is 2-100 mm, the carbon fibers used by the skin are high-modulus carbon fibers (M40J, M55J, M60J and the like), and the main reflecting surface is formed by a hot-pressing tank heating, pressurizing and curing forming method. The auxiliary reflecting surface 2 is made of carbon fiber/resin composite materials, the fibers are high-strength carbon fibers (T700, T800 and the like), the thickness is 2-20 mm, and the auxiliary reflecting surface is formed by a mould pressing curing forming method. The feed source support 3 and the support rod 4 are made of carbon fiber/resin composite materials, the fibers are high-strength carbon fibers (T700, T800 and the like), the thickness of the fibers is 2-20 mm, and the forming method is completed through a hot-pressing tank heating and pressurizing curing forming method.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (7)
1. The carbon fiber parabolic antenna focusing assembly method is characterized in that the carbon fiber parabolic antenna comprises a main reflecting surface (1), an auxiliary reflecting surface (2), a feed source support (3) and a support rod (4), and the method comprises the following steps:
coarse focusing step: carrying out primary focusing assembly on the main reflecting surface (1), the auxiliary reflecting surface (2), the feed source support (3) and the support rod (4) by adopting a focusing assembly tool;
a precise focusing step: measuring the main reflecting surface (1) and the auxiliary reflecting surface (2) by using a laser tracker, and finely adjusting the main reflecting surface (1) and the auxiliary reflecting surface (2) according to the actual measurement result of the laser tracker;
and (3) fastening and assembling: the following parts are fastened and assembled through a fastener:
-between the main reflecting surface (1) and the supporting bar (4);
-between the sub-reflecting surface (2) and the supporting bar (4);
-between the feed source holder (3) and the main reflecting surface (1);
the coarse focusing step comprises the following steps:
setting an initial reference of a reflecting surface: reserving a reference on the main reflecting surface (1) and the auxiliary reflecting surface (2);
a tool setting step: designing a focusing assembly tool, and reserving a reference on one or more glue joint assembly tools;
the step of setting the initial reference of the reflecting surface comprises the following steps:
setting an initial reference of a main reflecting surface: arranging a centering pin in a threaded hole on a central carbon ring embedded in the main reflecting surface (1), and taking the centering pin as an initial reference of the main reflecting surface (1);
setting an initial reference of the subreflector: the bottom of the outer ring of the sub-reflecting surface (2) is locally thickened by carbon cloth, the roundness of the outer ring of the sub-reflecting surface (2) and the relation between the outer ring of the sub-reflecting surface (2) and the axis of the sub-reflecting surface (2) are guaranteed through machining, and the thickened outer ring of the sub-reflecting surface (2) is used as the initial reference of the sub-reflecting surface (2).
2. The carbon fiber parabolic antenna focusing assembly method according to claim 1, wherein the tool setting step comprises the steps of:
a bottom plate setting step: arranging a bottom plate (5), wherein the bottom plate (5) can be used for leveling the back rib of the main reflecting surface (1) at an angle of 1.95 degrees;
the auxiliary reverse positioning plate setting step: an auxiliary reverse positioning plate (6) is arranged, and a reference block and a reference hole are reserved on the auxiliary reverse positioning plate (6).
3. The carbon fiber parabolic antenna focusing assembly method according to claim 1, wherein in the coarse focusing step, focusing is initially carried out until an X-direction deviation is 0.3-5 mm and a Y-direction deviation is 0.3-5 mm;
in the accurate focusing step, the X-direction deviation is 0.01-1 mm, and the Y-direction deviation is 0.01-1 mm.
4. The carbon fiber parabolic antenna focusing assembly method according to claim 1, characterized in that in the precise focusing step, the sub-reflecting surface (2) is finely adjusted for a plurality of times by using an actual measurement result of a laser tracker, and precise focusing assembly between the main reflecting surface (1) and the sub-reflecting surface (2) is completed by using an iteration method.
5. The carbon fiber parabolic antenna focusing assembly method according to claim 1, characterized in that in the fastening assembly step, the fastening member is connected in an adhesive manner, and glue is filled in gaps of the fastening member.
6. A carbon fiber parabolic antenna for realizing the carbon fiber parabolic antenna focusing assembly method according to any one of claims 1 to 5, characterized by comprising a main reflecting surface (1), an auxiliary reflecting surface (2), a feed source bracket (3) and a support rod (4);
the main reflecting surface (1) is connected with the auxiliary reflecting surface (2) through one or more supporting rods (4), and the feed source support (3) is arranged at a central carbon ring on the main reflecting surface (1).
7. Carbon fiber parabolic antenna according to claim 6, characterised in that the main reflecting surface (1) is a carbon skin honeycomb sandwich structure, the carbon fibers used for the carbon skin comprised in the carbon skin honeycomb sandwich structure being high modulus carbon fibers; the main reflecting surface (1) is manufactured by a method of heating, pressurizing, curing and molding by an autoclave;
the material of the auxiliary reflecting surface (2) is a composite material of high-strength carbon fiber and resin, and the auxiliary reflecting surface (2) is manufactured by a mould pressing curing forming method;
the feed source support (3) and the support rod (4) are both made of high-strength carbon fiber and resin composite materials, and the feed source support (3) and the support rod (4) are both manufactured by an autoclave heating and pressurizing curing molding method.
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| CN103135616A (en) * | 2013-01-24 | 2013-06-05 | 北京航空航天大学 | Molded surface regulating device and regulating method of honeycomb sandwich structure high-accuracy panel |
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| CN103490173B (en) * | 2013-09-30 | 2015-11-18 | 无锡华信雷达工程有限责任公司 | Portable carbon fiber double reverse satellite communication antenna |
| CN204103047U (en) * | 2014-10-21 | 2015-01-14 | 中国工程物理研究院应用电子学研究所 | A kind of millimeter-wave near-field mechanical focusing dual reflector antenna |
| CN104690983A (en) * | 2015-02-10 | 2015-06-10 | 芜湖航飞科技股份有限公司 | Method for manufacturing multi-beam parabolic antenna |
| CN105609966B (en) * | 2015-09-25 | 2019-04-19 | 北京爱科迪通信技术股份有限公司 | Split-type antenna reflective face and its design method |
| CN204991951U (en) * | 2015-09-28 | 2016-01-20 | 北京星网卫通科技开发有限公司 | Antenna and feed -line system of exceedingly high line in moving |
| CN207408497U (en) * | 2017-10-31 | 2018-05-25 | 北京航空航天大学 | A kind of antenna feeder formula tightens field device |
| CN108375453B (en) * | 2018-04-27 | 2024-04-12 | 中国科学院西安光学精密机械研究所 | Vertical adjustment system and method for X-ray focusing lens |
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| CN103135616A (en) * | 2013-01-24 | 2013-06-05 | 北京航空航天大学 | Molded surface regulating device and regulating method of honeycomb sandwich structure high-accuracy panel |
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