CN104518287B - Varifocal reflection surface system based on ring rib post cable net structure - Google Patents
Varifocal reflection surface system based on ring rib post cable net structure Download PDFInfo
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- CN104518287B CN104518287B CN201410819702.2A CN201410819702A CN104518287B CN 104518287 B CN104518287 B CN 104518287B CN 201410819702 A CN201410819702 A CN 201410819702A CN 104518287 B CN104518287 B CN 104518287B
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Abstract
The invention discloses a kind of varifocal reflection surface system based on ring rib post cable net structure, mainly solve existing reflecting surface cannot zoom, the problem that feed location is fixed.Which includes：Feed (1), reflection rope net (2), ribs bar structure (3), support cable mesh (4), vertical drag-line (5), the fixed truss structure (6) of annular, central strut (7), ring rib joint (9) and reflecting surface (10)；Varifocal sleeve (8) is cased with the outside of the central strut (7), the varifocal sleeve (8) is connected with reflection rope net (2) and support cable mesh (4)；By the position for adjusting varifocal sleeve (8), change the length of reflection rope net (2) and support cable mesh (4), realize the shape of reflecting surface (10) by parabolic towards plane transition large scale varifocal.Present configuration is easy flexibly, extends the focal range and reflection function of reflecting surface, can be used for the convergence or reflection of the electromagnetic wave or luminous energy on space, naval vessel or ground.
Description
Technical field
The invention belongs to communication-electronics field, specifically a kind of varifocal reflection surface system, can be used for space, warship
The convergence or reflection of the electromagnetic wave or luminous energy on ship or ground.
Background technology
Varifocal technology is widely used in optical system, such as in the camera lens of camera, can pass through rotating lens
Focusing ring suitably changes focal length, realizes the change of focusing distance, so as to complete the clear shooting of different far and near distance objects.
But in communication-electronics field in commonly used large-scale reflection surface system, the related report of zoom applications
Road is little.Analyze its reason to be summarized as follows：
Limited for undersized reflection surface system, the sphere of action of varifocal, operating power is limited, and application value is not
Greatly.
For the Large Deployable reflecting surface of too aerial applications, reliable due to Large Deployable reflecting surface is launched and accurate
Shaping itself has been the key core problem for being difficult effectively solving, and varifocal technology not yet brings into schedule.
For the large-scale reflecting surface applied on ground, it is contemplated that the guarantor's type under the effect such as gravity, wind and snow load needs,
The general reflecting surface form using fixed reality face, is difficult to realize varifocal function.In double-reflecting face system, minor face is suitably finely tuned
Position, it is possible to achieve the fine setting of reflection surface system focal length.But, the varifocal function of large scale is still difficult to realize.
Using the reflecting surface form in fixed reality face, as the feed location of its antenna is fixed, fixation can only be received or reflect
The feed of position, it is impossible to realize the shared same reflection face of feed of multiple positions, reflecting surface utilization ratio is low, especially cost into
This high large-scale solid face reflecting surface；Gu the feed location of face reflector antenna is fixed, its electromagnetic energy or luminous energy transmission range are limited,
Comprehensive covering of transmission range cannot be realized.
The content of the invention
Present invention aims to the deficiency of above-mentioned prior art, proposes a kind of change based on ring rib post cable net structure
Focal length reflection surface system, to change the paraboloidal radian of antenna, adjusts feed location, expands the transmission distance of electromagnetic energy or luminous energy
From raising reflecting surface efficiency.
For achieving the above object, the present invention provides the following two kinds technical scheme, including：
Technical scheme one
A kind of ring rib post cable net structure reflection surface system, including：Feed, reflection rope net, ribs bar structure, supporting cables
Net, regulation drag-line, the fixed truss structure of annular, central strut, ring rib joint and reflecting surface；One end of ribs bar structure passes through
Ring rib joint is connected with the fixed truss structure of annular, constitutes a rigid overall structure；Reflection rope Netcom overregulates drag-line and props up
Support rope net is connected, and binding has reflecting surface to reflection rope on the net, constitutes whole cable mesh reflector structure；It is characterized in that：Central strut
Outside be cased with varifocal sleeve, for changing paraboloidal focal length；
The varifocal sleeve, including upper and lower two travelling nuts, upper and lower two pulleys, screw mandrel, spring, shell and flanges
Disk；Ring flange is connected with the other end of folding support rib bar structure；The two ends of spring respectively with shell and ribs bar structure
Middle part is connected；, for being oriented to reflecting rope net, lower sheave is for being oriented to support cable mesh for top sheave；Upper travelling nut
It is connected with the reflection rope net after guiding by screw mandrel, lower travelling nut is connected with the support cable mesh after guiding by screw mandrel, is passed through
Adjust the position of upper and lower two travelling nuts, change the length of reflection rope net and support cable mesh, realize the shape of reflecting surface by throwing
Large scale varifocal of the object plane to plane transition.
Technical scheme two
A kind of ring rib post cable net structure reflection surface system, including：Feed, reflection rope net, ribs bar, support cable mesh, tune
The fixed truss structure of section rope net, annular, central strut, ring rib joint and reflecting surface, one end of ribs bar structure passes through ring rib
Joint is connected with the fixed truss structure of annular, constitutes a rigid overall structure；Reflection rope Netcom overregulates drag-line and supporting cables
Net is connected, and reflecting surface is bundled in reflection rope on the net, constitutes whole cable mesh reflector structure；
It is characterized in that：Moving sleeve, lower moving sleeve and upper downhaul adjuster are cased with the outside of central strut；Under
Moving sleeve is connected with the other end of ribs bar structure；Rotation straight-bar is connected with the outside of upper moving sleeve, straight-bar is rotated
The other end is connected with the middle part of ribs bar structure；Reflection rope net is connected through upper moving sleeve with upper drag-line adjuster, is supported
Rope net is connected through lower moving sleeve with downhaul adjuster, is gone up between drag-line adjuster and upper moving sleeve by adjustment respectively
Distance and the distance between downhaul adjuster and lower moving sleeve change the length of reflection rope net and support cable mesh, realize anti-
Penetrate the shape in face by parabolic towards plane transition large scale varifocal.
It is of the invention to have the advantage that compared with existing correlation technique：
(1) present invention can realize the shape of reflecting surface by parabola as zoom lens are cased with outside centre strut
To the large scale varifocal of plane transition.
(2) zoom lens of the invention are due to reflecting rope net to change in the position for adopting upper and lower two travelling nuts of adjustment
With the length of support cable mesh, easily the focal length of reflecting surface can be adjusted.
(3) zoom lens of the invention due to adopt the distance between the upper drag-line adjuster of adjustment and upper moving sleeve and
The distance between downhaul adjuster and lower moving sleeve, can be more accurate changing the length of reflection rope net and support cable mesh
Realize to reflecting surface Focussing.
(4) present invention makes the folding triangle on reflecting surface same due to changing during the length of reflection rope net and support cable mesh
To folding, can guarantee that reflecting surface has high-profile precision after large scale varifocal.
(5) present invention be due to can carry out zoom to reflecting surface, and the focus of reflecting surface can be made to level off to infinity, therefore, it is possible to
Long-distance transmissions converge electromagnetic wave.
Description of the drawings
Fig. 1 is the overall structure diagram of technical solution of the present invention one；
Fig. 2 is the close-up schematic view of technical solution of the present invention one；
Fig. 3 is the overall structure diagram of technical solution of the present invention two；
Fig. 4 is the close-up schematic view of technical solution of the present invention two；
Fig. 5 is the schematic diagram that zoom back reflection face is changed into plane in the present invention；
Fig. 6 is the schematic diagram of the fixed truss structure of annular in the present invention；
Fig. 7 is the schematic diagram of ribs bar structure in the present invention；
Fig. 8 is the varifocal tube-in-tube structure schematic diagram in technical solution of the present invention one；
Fig. 9 is the upper drag-line adjuster structural representation in technical solution of the present invention two；
Figure 10 is the upper moving sleeve structural representation in technical solution of the present invention two；
Figure 11 is the downhaul adjuster structural representation in technical solution of the present invention two；
Figure 12 is the lower moving sleeve structural representation of technical scheme two in the present invention；
Figure 13 is reflecting surface folding schematic diagram in the present invention；
Figure 14 is that Fig. 1 configuration biases are installed on its reflecting surface of spacecraft for paraboloidal original state schematic diagram；
Figure 15 is the schematic diagram that Fig. 1 configuration biases are installed on that spacecraft its reflecting surface zooms to flat state；
It is paraboloidal original state schematic diagram that Figure 16 is Fig. 3 structures its reflecting surface when ground is runed；
Figure 17 is the schematic diagram that Fig. 3 structures its zoom back reflection face when ground is runed is changed into flat state.
Specific embodiment
Embodiment 1：Using the ring rib post cable mesh reflector system of varifocal sleeve.
See figures.1.and.2, the present invention includes：It is feed 1, reflection rope net 2, ribs bar structure 3, support cable mesh 4, vertical
The fixed truss structure 6 of drag-line 5, annular, central strut 7, varifocal sleeve 8, ring rib joint 9 and reflecting surface 10.Wherein：Varifocal
Sleeve 8 is enclosed within outside central strut 7, and feed 1 is arranged on the top of central strut 7；One end of ribs bar structure 3 passes through ring rib
Joint 9 is connected with the fixed truss structure 6 of annular, and the other end is connected with the middle part of varifocal sleeve 8, is constituted a rigidity entirety and is tied
Structure；One end of reflection rope net 2 is connected with the upper end of the fixed truss structure 6 of annular, the upper end phase of the other end and varifocal sleeve 8
Even；One end of support cable mesh 4 is connected with the lower end of the fixed truss structure 6 of annular, the lower end phase of the other end and varifocal sleeve 8
Even；The upper end of vertical drag-line 5 is connected with reflection rope net 2, and lower end is connected with support cable mesh 4；Reflection rope net 2 is tied up with reflecting surface 10
It is fixed, constitute whole cable mesh reflector structure.
With reference to Fig. 6, the annular of the present invention fixes truss structure 6, including：A plurality of ring joints 602 and a plurality of fixed purlins
Frame 601, each two are fixed and are connected by a ring joint 602 between truss 601, by spring or rope driving ring joint
602 are deployed into locking behind fixed position, make entirely to fix the composition hoop truss structure of truss 601.Wherein, ring joint 602 and solid
The concrete structure and type of attachment of determinate truss 601 is identical with " fixed truss structure deployable surface device " patent of applicant, specially
Profit number is ZL201010573066.1.
Reference Fig. 7, the ribs bar structure 3 of the present invention, including：A plurality of rib bars 301 and a plurality of rib joints 302, often
Connected by a rib joint 302 between two rib bars 301, drive rib joint 301 to be deployed into fixation by spring or rope
Locking behind position, makes whole rib bar 301 constitute ribs bar structure.Its middle ring rib joint 9, concrete structure in rib joint 302 with
" reflection surface system capable of spacing expansion " patent of applicant is identical, Patent No. ZL200810017476.0.
Reference Fig. 8, the varifocal sleeve 8 of the present invention, including upper travelling nut 801, lower travelling nut 802, top sheave
803, lower sheave 808, screw mandrel 804, spring 805, shell 806 and ring flange 807；Ring flange 807, top sheave 803 and lower sheave
808 outsides for being fixed in shell 806, ring flange 807 are connected with one end of ribs bar structure 3；The two ends of spring 805 respectively with
Shell 806 is connected with the middle part of ribs bar structure 3；Reflection rope net 2 bypasses top sheave 803, is connected with upper travelling nut 801；
Support cable mesh 4 bypasses lower sheave 808, is connected with lower travelling nut 802；The upper travelling nut 801 of upper end connection of screw mandrel 804, under
The lower travelling nut 802 of end connection.
With reference to Figure 13, the reflecting surface 10 of the present invention, comprising N number of folding triangle, the folding angles of each triangle are α,
The auxiliary angle of adjacent triangle is β, and meets N (alpha+beta)=360 °；During the length of change reflection rope net 2 and support cable mesh 4,
Each triangle is made to fold in the same direction, it is ensured that reflecting surface 10 has high-profile precision, wherein N >=3 after large scale varifocal.
When varifocal sleeve 8 is moved to 1 direction of feed on central strut 7, effect of the ribs bar 3 in spring 805
Lower folding, reflection rope net 2 and support cable mesh 4 occur lax；804 rotation of screw mandrel, makes 801 He of upper travelling nut by worm drive
Lower travelling nut 802 is axially moveable, and so as to change the position of upper travelling nut 801 and lower travelling nut 802, and then changes anti-
The length of rope net 2 and support cable mesh 4 is penetrated, each triangle on reflecting surface 10 is folded in the same direction, is realized the shape of reflecting surface 10
By parabolic towards plane transition large scale varifocal, and become it is defocused with high-profile precision.Ring rib post cable mesh reflector system
Zoom back reflection face is as shown in Figure 5 for the schematic diagram of plane.
Embodiment 2：Using the ring rib post cable mesh reflector system for moving up and down sleeve
With reference to Fig. 3 and Fig. 4, the present invention includes：It is feed 1, reflection rope net 2, ribs bar structure 3, support cable mesh 4, vertical
The fixed truss structure 6 of drag-line 5, annular, central strut 7, ring rib joint 9, reflecting surface 10, upper moving sleeve 11, lower moving sleeve
12nd, upper drag-line adjuster 13, downhaul adjuster 14 and rotation straight-bar 15；It is upper drag-line adjuster 13, upper moving sleeve 11, drop-down
Rope adjuster 14 and lower moving sleeve 12 are sequentially sleeved in the outside of central strut 7, and feed 1 is arranged on the top of central strut 7；
One end of stake rib bar structure 3 passes through ring rib joint 9 and the fixed truss structure 6 of annular is connected, the other end and lower 12 phase of moving sleeve
Even；The one end for rotating straight-bar 15 is connected with upper moving sleeve 11, and the other end is connected with the middle part of ribs bar structure 3；Reflection rope
One end of net 2 is connected with the upper end of the fixed truss structure 6 of annular, and the other end knots through upper moving sleeve 11 and terminates at drag-line
Adjuster 13；One end of support cable mesh 4 is connected with the lower end of the fixed truss structure 6 of annular, and the other end passes through lower moving sleeve 12
Knotting terminates at downhaul adjuster 14；The upper end of vertical drag-line 5 is connected with reflection rope net 2, and lower end is connected with support cable mesh 4,
Binding on reflection rope net 2 has reflecting surface 10, constitutes whole cable mesh reflector structure；
With reference to Fig. 9, the upper drag-line adjuster 13 of the present invention, comprising a plurality of through wires holes 1301, reflection rope net 2 passes through threading
Hole 1301 knots and terminates.
Reference Figure 10, the upper moving sleeve 11 of the present invention, including：A plurality of through wires holes 1101 and upper flange plate 1102, on
In the lower end of through wires hole 1101, such as shown in figure (10a), through wires hole 1101 is the through hole of circular arc to ring flange 1102, such as figure (10b)
Shown, reflection rope net 2 is connected through through wires hole 1101 with upper drag-line adjuster 13, upper flange plate 1102 and rotation 15 phase of straight-bar
Even.
With reference to Figure 11, the downhaul adjuster 14 of the present invention, comprising a plurality of through wires holes 1401, support cable mesh 4 is worn
String holes 1401 knots and terminates.
Reference Figure 12, the lower moving sleeve 12 of the present invention, including：A plurality of through wires holes 1201 and lower flange 1202, under
Outer middle side part of the ring flange 1202 in through wires hole 1201, such as shown in figure (12a), through hole of the through wires hole 1201 for circular arc is such as schemed
(12b) shown in, support cable mesh 4 is connected through through wires hole 1201 with downhaul adjuster 14, lower flange 1202 and ribs bar
Structure 3 is connected.
The fixed truss structure 6 of annular, ribs bar structure 3 and the folding scheme with reflecting surface 10 and enforcement in this example
Structure described in example 1 is identical.
When upper moving sleeve 11 is moved to 1 direction of feed along central strut 7, reflection rope net 2 relaxes, and rotates 15 turns of straight-bar
It is dynamic, make ribs bar structure 3 occur to fold, drive lower moving sleeve 13 to move along central strut 7, make support cable mesh 4 relax；On
Drag-line adjuster 13 is moved along central strut 7, between upper moving sleeve 11 produces range difference, by range difference between the two
To change the length of reflection rope net 2；Downhaul adjuster 14 is moved along central strut 7, produce between lower moving sleeve 12 away from
Deviation, changes the length of support cable mesh 4 by range difference between the two；By changing reflection rope net 2 and support cable mesh 4
Length, makes each triangle on reflecting surface 10 fold in the same direction, realizes the shape of reflecting surface 10 by parabolic towards plane transition
Large scale varifocal, and become defocused with high-profile precision.Ring rib post cable mesh reflector system zoom back reflection face is plane
Schematic diagram is as shown in Figure 5.
The effect of the present invention can be verified by following emulation experiment：
1. analogue system and structure
Present invention experiment system used is the ring rib post cable mesh reflector system for launching bore for 15m.
The system ring rib post cable net structure adopts 6 ribs bar structures, every 4 decile of ribs bar structure, outside rib bar
Footpath 0.014m, internal diameter 0.013m；24 decile of annulus of the fixed truss structure of annular, fixed truss depth 0.1m, ring bar external diameter
0.016m, internal diameter 0.015m, pole external diameter 0.014m, internal diameter 0.013m；The high 2.4m of central strut, diameter 0.03m；Ring rib post rope
The rigid backbone of web frame, in rounding state lower relative aperture 0.766m, height 1.958m；Bore after expansion is 15m, and reflecting surface is burnt
Footpath ratio is 0.6.The external diameter of the online drag-line of all ropes is 0.001 meter, and all rigid bars select carbon fibre materials, the choosing of flexible cable net
Select kevlar fiber material.
2. emulation content
Emulation 1, under space environment, to launching the reflection before ring rib post cable mesh reflector system zoom of the bore for 15m
Face is emulated.
Under space environment, ring rib post cable mesh reflector systemic bias of the gross mass less than 16Kg are installed on into spacecraft
On, some fixed constraints of the fixed truss structure of annular are made, standing balance solution is carried out to whole system, as a result as shown in figure 14.
It is seen from figure 14 that reflecting surface maximum distortion is 0.002m, surface density is less than 0.1Kg/m2, mirror surface is equal
Square error is less than 0.002m.These as shown by data, it is anti-before the ring rib post cable mesh reflector system zoom under space environment
The face of penetrating has outstanding integrated performance index.
Emulation 2, under space environment, to launching bore for the defocused reflection of the ring rib post cable mesh reflector system change of 15m
Face is emulated.
Using the scheme of embodiment 1, the varifocal sleeve in 1 structure of emulation is moved into 1.67m towards feed direction, by bullet
Ribs bar structure is bent to 7.492m by 7.676m by spring, is shorten to Suo Wangchang is reflected by 7.689m by upper travelling nut
Support cable mesh length is shorten to 7.501m by 7.676m by lower travelling nut by 7.479m, makes reflecting surface become flat by parabola
Face.Whole system to becoming defocused carries out standing balance solution, as a result as shown in figure 15.
It can be seen from fig. 15 that reflecting surface maximum distortion is 0.0030m, mirror surface root-mean-square error is less than
0.002m.These as shown by data, under space environment the ring rib post cable mesh reflector system after large scale varifocal, reflecting surface
Sufficiently high type face precision is still kept, expected varifocal target has been reached.
Emulation 3, under ground environment, to launching the reflection before ring rib post cable mesh reflector system zoom of the bore for 15m
Face is emulated.
Under ground environment, the rib bar external diameter of ring rib post cable mesh reflector system is changed into into 0.026m, internal diameter is changed into
0.022m；Ring bar external diameter is changed into 0.026m, and internal diameter is changed into 0.022m, and pole external diameter is changed into 0.018m, and internal diameter is changed into 0.016m.
Under ground environment, gross mass is less than into 60Kg, feed quality is 5.23Kg, and reflecting surface is in 45 degree of angles of pitch placements
Ring rib post cable mesh reflector system be installed in ground pedestal, centrosymmetric three solid point is adopted to the fixed truss structure of annular
Conclude a contract or treaty beam, standing balance solution is carried out to whole system, as a result as shown in figure 16.
As can be seen from Figure 16, the maximum distortion of reflecting surface is 0.0190m, and surface density is less than 0.35Kg/m2, reflecting surface table
Face root-mean-square error is less than 0.006m.These as shown by data, under ground environment before the ring rib post cable mesh reflector system zoom
Reflecting surface there is outstanding integrated performance index.
Emulation 4, under ground environment, to launching bore for the defocused reflection of the ring rib post cable mesh reflector system change of 15m
Face is emulated.
Using the scheme of embodiment 2, the upper moving sleeve on the centre strut in emulation 3 is moved towards feed direction
1.67m, makes ribs bar structure shorten to 7.492m by 7.676m by lower moving sleeve, makes reflection by upper drag-line adjuster
Rope net length shorten to 7.479m by 7.689m, makes support cable mesh length shorten to 7.501m by 7.676m by downhaul adjuster,
Reflecting surface is made by parabola complanation.Whole system to becoming defocused carries out standing balance solution, as a result as shown in figure 17.
As can be seen from Figure 17, the maximum distortion of reflecting surface is 0.0121m, and surface Root Mean Square error is less than 0.005m.This
A little as shown by data, under ground environment, after large scale varifocal, reflecting surface still keeps foot to the ring rib post cable mesh reflector system
Enough high type face precision, have reached expected varifocal target.
The varifocal reflection surface system based on ring rib post cable net structure that the above-mentioned simulation result explanation present invention is provided, structure
Succinctly, surface density is low, and before zoom and zoom rear profile face precision all meets expectation and requires, either in space or on ground
On, suffer from superperformance.
Claims (10)
1. a kind of ring rib post cable net structure reflection surface system, including：Feed (1), reflection rope net (2), ribs bar structure (3),
The fixed truss structure (6) of support cable mesh (4), vertical drag-line (5), annular, central strut (7), ring rib joint (9) and reflecting surface
(10)；Top of the feed (1) installed in central strut (7)；One end of ribs bar structure (3) passes through ring rib joint (9) and ring
Shape is fixed truss structure (6) and is connected, and constitutes a rigid overall structure；One end of reflection rope net (2) and the fixed truss knot of annular
The upper end of structure (6) is connected, and one end of support cable mesh (4) is connected with the lower end of the fixed truss structure (6) of annular, reflection rope net (2)
Upper binding has reflecting surface (10), constitutes whole cable mesh reflector structure；
It is characterized in that：Varifocal sleeve (8) is cased with the outside of central strut (7), upper end and the reflection of the varifocal sleeve (8)
The other end connection of rope net (2), lower end is connected with the other end of support cable mesh (4), for changing paraboloidal focal length；
The varifocal sleeve (8), including upper and lower two travelling nuts (801,802), upper and lower two pulleys (803,808), silk
Bar (804), spring (805), shell (806) and ring flange (807)；Ring flange (807) is another with folding support rib bar structure (3)
One end is connected；The two ends of spring (805) are connected with the middle part of shell (806) and ribs bar structure (3) respectively；Top sheave
(803) for being oriented to reflecting rope net (2), lower sheave (808) is for being oriented to support cable mesh (4)；Upper mobile spiral shell
Female (801) by screw mandrel (804) be oriented to after reflection rope net (2) be connected, lower travelling nut (802) by screw mandrel (804) and
Support cable mesh (4) after guiding is connected, and by the position for adjusting upper and lower two travelling nuts, changes reflection rope net (2) and supports
The length of rope net (4), realize the shape of reflecting surface (10) by parabolic towards plane transition large scale varifocal.
2. a kind of ring rib post cable net structure reflection surface system according to claim 1, it is characterised in that：The fixed truss of annular
Structure (6), including：A plurality of fixed truss (601) and a plurality of ring joints (602), each two are fixed
Ring joint (602) connection is crossed, circular gathering is constituted, is launched ring structure.
3. a kind of ring rib post cable net structure reflection surface system according to claim 1, it is characterised in that：Ribs bar structure
(3), including：A plurality of rib bars (301) and a plurality of rib joints (302), pass through a rib joint between each two rib bar (301)
(302) connect, constitute and draw in, launch rib structure.
4. a kind of ring rib post cable net structure reflection surface system according to claim 1, it is characterised in that：Reflection rope net (2)
The upper end of fixed truss (601), support cable mesh (4) are fixed on truss (601) lower end, adjustment drag-line (5) be vertically fixed on this two
Between layer rope net, reflecting curved surface structure is formed.
5. a kind of ring rib post cable net structure reflection surface system according to claim 1, it is characterised in that：Reflecting surface (10),
Comprising N number of folding triangle, the folding angles of each triangle are α, and the auxiliary angle of adjacent triangle is β, and meet N (α+
β)=360 °；During the length of change reflection rope net (2) and support cable mesh (4), each triangle is made to fold in the same direction, it is ensured that reflecting surface
(10) with high-profile precision, wherein N >=3 after large scale varifocal.
6. a kind of ring rib post cable net structure reflection surface system, including：Feed (1), reflection rope net (2), ribs bar (3), support
The fixed truss structure (6) of rope net (4), vertical drag-line (5), annular, central strut (7), ring rib joint (9) and reflecting surface (10)；
Feed (1) is fixed with annular by ring rib joint (9) installed in the top of central strut (7), one end of ribs bar structure (3)
Truss structure (6) is connected, and constitutes a rigid overall structure；One end of reflection rope net (2) and the fixed truss structure (6) of annular
Upper end is connected, and one end of support cable mesh 4 is connected with the lower end of the fixed truss structure (6) of annular, and reflecting surface (10) is bundled in reflection
On rope net (2), whole cable mesh reflector structure is constituted；
It is characterized in that：Moving sleeve (11) is cased with the outside of central strut (7), lower moving sleeve (12) and upper downhaul are adjusted
Whole device (13,14)；Lower moving sleeve (12) is connected with the other end of ribs bar structure (3)；The outside of upper moving sleeve (11)
Rotation straight-bar (15) is connected with, the other end for rotating straight-bar (15) is connected with the middle part of ribs bar structure (3)；Reflection rope net
(2) the other end is connected through upper moving sleeve (11) with upper drag-line adjuster (13), and the other end of support cable mesh (4) is passed through down
Moving sleeve (12) is connected with downhaul adjuster (14), respectively by upper drag-line adjuster (13) of adjustment and upper moving sleeve
The distance between (11) change reflection rope net (2) and prop up with the distance between downhaul adjuster (14) and lower moving sleeve (12)
The length of support rope net (4), realize the shape of reflecting surface by parabolic towards plane transition large scale varifocal.
7. a kind of ring rib post cable net structure reflection surface system according to claim 6, it is characterised in that：Upper moving sleeve
(11) have on a plurality of through wires holes (1101) and with upper flange plate (1102), reflection rope net (2) through through wires hole (1101) with it is upper
Drag-line adjuster (13) is connected, and upper flange plate (1102) is connected with straight-bar (15) is rotated.
8. a kind of ring rib post cable net structure reflection surface system according to claim 6, it is characterised in that：Upper drag-line adjuster
(13) there are a plurality of through wires holes (1301) on, reflection rope net (2) knots through through wires hole (1301) and terminates.
9. a kind of ring rib post cable net structure reflection surface system according to claim 6, it is characterised in that：Lower moving sleeve
(12) have a plurality of through wires holes (1201) and lower flange (1202) on, support cable mesh (4) through through wires hole (1201) with it is drop-down
Rope adjuster (14) is connected, and lower flange (1202) is connected with ribs bar structure (3).
10. a kind of ring rib post cable net structure reflection surface system according to claim 6, it is characterised in that：Downhaul is adjusted
There are a plurality of through wires holes (1401) on device (14), support cable mesh (4) knots through through wires hole (1401) and terminates.
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|---|---|---|---|---|
| CN106025568B (en) * | 2016-05-23 | 2018-08-31 | 西安电子科技大学 | A kind of inflating thin film reflecting surface device with shape adjustment function |
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