CN200941426Y - Multi-beam feedback source auto switching gear of large-scale flexible radio telescope antenna - Google Patents
Multi-beam feedback source auto switching gear of large-scale flexible radio telescope antenna Download PDFInfo
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- CN200941426Y CN200941426Y CN 200620079585 CN200620079585U CN200941426Y CN 200941426 Y CN200941426 Y CN 200941426Y CN 200620079585 CN200620079585 CN 200620079585 CN 200620079585 U CN200620079585 U CN 200620079585U CN 200941426 Y CN200941426 Y CN 200941426Y
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Abstract
The utility model which discloses an automatic multiple-beam feeder switching unit relating to a large-scale flexible antenna structure solves mainly the problem that the relatively wide frequency is needed in the large-scale flexible antenna in astronomical observation. The automatic multiple-beam feeder switching device 10 comprises mainly a rotating platform 14, a multiple-beam feeder 13 and a hollow supporting bearing 21. The multiple-beam feeder 13 which is distributed evenly on the rotating platform 14 can rotate comparing to a fine tuning platform 9 by the support of the hollow supporting bearing 21. The multiple-beam feeder controller switching the feeder of any band, the multiple-beam feeder 13 can be adjusted to the center of the fine tuning platform 9, thus obtaining the maximum radio signal reflection and achieving the radio signal receiving of the wider frequency band range on a signal focus. The utility model can be applied in the large-scale flexible antenna structure and the large-scale radio telescope system with the advantage of wider frequency range.
Description
Technical field
The utility model belongs to mechanical field, relates to flexible antenna structure, and specifically the multi-beam feed automatic switching control equipment of antenna can be used for large-scale flexible radio telescope system.
Background technology
Known in the industry, antenna feed is most important parts in the radio telescope system.During radio telescope work, by the parabolic antenna reflection, with the focus of radio signal gathering, by the antenna feed reception radio signal at this focus place, as Fig. 1 in parabolic antenna.The conventional rigidity radio telescope structural representation that this is shown in Figure 1 is made up of parabolic reflector 04, antenna feed 02, rigid structure support 03, and antenna feed 02 is installed in and receives the radio signal that parabolic reflector 04 reflection is converged on the focus of parabolic reflector 04.Because the bore 01 of parabolic reflector 04 is smaller, the radio source frequency range of observation is also with regard to relative narrower.
For the signal of the radio source of the signal that obtains faint radio source and wider frequency range, need to increase the bore of reflecting surface and the reception feed of the more broad frequency range installed at the focus place.But increase and the more reception of broad frequency range along with the bore of radio telescope reflecting surface make the structure of radio telescope that the change of essence take place, and the support of feed can not rely on rigid structure to realize; The reception feed of single frequency band can not satisfy the needs of observation.Thereby large-scale radio telescope is off the beaten track, must adopt flexible structure support feed and multiband wave beam feed to realize bigger reflecting surface bore and the more radio signal reception of broad frequency range.Fig. 2 has provided flexible structure supporting antenna feed structure schematic diagram, it is exactly around the reflecting surface 05 of antenna that this flexible structure supports feed, one group of high tower 06 of erect, use the cable wire 07 with the same quantity of support tower to be connected in feed cabin 09 again through the leading block 08 that supports on the cat head, the other end of cable wire 07 is connected on the cable wire driver 010, and multiband wave beam feed can be installed on the feed cabin 09 as required.Because the reflecting surface 05 of antenna can be designed as dynamic adjustment, so the reflector focus of reflecting surface 05 also is variable, thereby, can use cable wire 07 to drive the motion of feed cabin, adjust the feed cabin on the focus of reflecting surface.For position and the attitude of more accurately adjusting feed, in the feed cabin, fine tuning platform can also be installed, and will receive feed and be installed on the fine tuning platform.
Because it is to carry out in more among a small circle that the appearance motion is decided in general antenna feed space orientation, the frequency band relative narrower of its feed, thereby use single feed just can meet the demands.Though this single feed is simple in structure, reliable, maximum deficiency is the application that can not realize in the wider frequency range.At present, when carrying out the reception of broad frequency band, be feed, or use different radio telescopes to realize by the another kind of frequency range of artificial replacing.But for the astronomical observation of in very wide frequency range, carrying out, just must design big radio telescope of new generation.According to the requirement of astronomical observation etc., the important technological parameters and the index request of this big radio telescope are as follows:
1. the radius of curvature of spherical reflector is 300m, and the spherical crown subtended angle is 120 °, and opening diameter is 500m, effective lighting bore 300m.
2. the maximum of sky covering is observed zenith angle ψ
Max=60 °.
3. operating frequency 0.2GHz-8.8GHz, being divided into is nine frequency ranges.Be respectively:
0.20GHz--0.46GHz，0.46GHz--0.92GHz，0.92GHz--1.72GHz，
1.72GHz--2.15GHz，2.15GHz--2.35GHz，2.80GHz--3.30GHz，
4.50GHz--5.10GHz，5.70GHz--6.70GHz，8.00GHz--8.80GHz。
4. sensitivity: 9 * GBT, 5.4 * VLA.
5. the tracking accuracy of feed is 4 " (4mm).
6. the snap-action speed of feed is 10 °/min.
The technical scheme that realizes the big radio telescope of this a new generation is to adopt the large-scale flexible antenna structure, promptly adopts cable wire to realize the pose adjustment of feed, as shown in Figure 3.When carrying out astronomical observation, send the cable wire movement instruction by the control computer according to the observation of being carried out, the movement instruction of cable wire is by the carrier of hardware control as instruction, controlling the 1-6# motor driver, the 1-6# motor driver is then directly being controlled the 1-6# thermo-mechanical drive, and the 1-6# cable wire that is wound on the 1-6# thermo-mechanical drive is done scanning motion through leading block driving feed cabin on the support cat head in the space.
Because this telescopical bore is big, the operating frequency height relies on and adjusts rope length and be difficult to realize on a large scale that the accurate position of feed and attitude control.Thereby, in the feed cabin, six-degree-of-freedom parallel connection mechanism has been installed, and feed has been installed on the lower platform of six-degree-of-freedom parallel connection mechanism, with the dynamic tracking position error of six-degree-of-freedom parallel connection mechanism real-Time Compensation feed, realize that appearance is decided in the accurate location of feed.
Simultaneously because telescope can be subjected to the interference of multiple factor at work, the physical location of feed will inevitably depart from its theoretical position, for this reason, need arrange laser eyepiece pose detector on the ground, it is the tracking mode laser total station, detect and feed back the physical location and the attitude of feed in real time, after receiving the physical location and attitude information of the feed after processed, the control computer passes through to adjust rope length according to control algolithm, simultaneously, it also controls the electric controller of six-degree-of-freedom parallel connection mechanism, drives the motion of six-degree-of-freedom parallel connection mechanism, and the position of feed and attitude are in the error range of permission eventually.
Because the maximum operating frequency of this large-scale flexible antenna is up to 8.8GHz, the positioning accuracy of feed has been proposed very high requirement, only rely on and adjust rope length and be difficult to reach positioning accuracy.For this reason, two stage control methods that adopted coarse adjustment to combine with accurate adjustment are with the fine tuning platform of six-degree-of-freedom parallel connection mechanism as feed, the dynamic tracking position error of real-Time Compensation feed, its antenna structure such as Fig. 4.Wherein feed cabin 6 is suspended in the air by six roots of sensation suspension cable 1, is distributed on the circumference 5 of the about 500m of diameter, highly is about 250m, and this six roots of sensation suspension cable 1 alternately is arranged in the top, cabin and the edge, cabin in hemisphere feed cabin 6 successively equably; Six leading blocks 2 on the column 3 and ground pulley mechanism 11 are connected on separately the driver 4; The effect of downhaul 7 is in order to improve cable wire feed cabin system rigidity.In order to realize the hi-Fix of feed, six-degree-of-freedom parallel connection mechanism 8 is fixed on the feed cabin 6, on the lower platform 9 of six-degree-of-freedom parallel connection mechanism 8 the multi-beam point-source feed is installed, to realize the application in the wider frequency range.Therefore, in the large-scale flexible antenna structure, because the multiband of feed, simple unlike the single frequency band feed, need to use the special switching mechanism and the method for multi-beam point-source feed, and how to design the switching mechanism and the method for multi-beam point-source feed, the feed of this frequency range is adjusted on the reflector focus of antenna reflective face, obtaining maximum signal reflex, is the problem that existing large-scale flexible antenna will solve in a hurry.
The content of utility model
The purpose of this utility model is to use the large-scale flexible antenna to need the requirement of broad frequency at astronomical observation, a kind of multi-beam feed automatic switching control equipment is provided, multiband feed timesharing switching is adjusted on the reflector focus of antenna reflective face, obtain the maximum radio signal of each frequency range feed, make a signal focus, can carry out the astronomical observation in the wider frequency range.
The technical scheme that realizes the utility model purpose is that the single feed of tradition is improved, in large-scale or huge radio telescope, needs according to astronomical observation have adopted the feed of a plurality of frequency ranges to take turns to operate, and realize that the feed in the large-scale flexible antenna wider frequency range is used.Its key problem in technology is the special multi-beam feed automatic switching control equipment of design, to guarantee the reliably working of whole large-scale flexible antenna.
Multi-beam feed automatic switching control equipment of the present utility model is installed in the lower platform of six-degree-of-freedom parallel connection mechanism in the large-scale flexible antenna feed cabin, be on the fine tuning platform, this automatic switching control equipment comprises: rotation platform, the multiband feed, the hollow support bearing, multiband feed controller, this multiband feed is distributed on the rotation platform, support by the hollow support bearing, can rotate relative to fine tuning platform, switch the feed of any wave band by multiband feed controller, it is adjusted to the fine tuning platform center, can obtain maximum radio signal reflex, to be implemented on the signal focus to the astronomical observation in the wider frequency range.
Above-mentioned multiband feed is distributed on the rotation platform, is in 360 degree scopes, and per 40 degree are arranged the feed of a wave band, and the distribution center of circle of these wave band feeds overlaps with the center of circle of rotation platform, and this distribution radius of a circle is R.
The axle of above-mentioned rotation platform is gone up by the hollow support bearing, is connected with passive and synchronous belt wheel or gear, and this passive and synchronous belt wheel or gear are connected to servomotor and deceleration device through active synchronization belt wheel or gear, drives the rotation platform rotation.
The utility model is owing to adopt multi-beam feed mechanism for automatically switching, by control band feed controller, a plurality of frequency range feed timesharing are switched to be adjusted on the reflector focus of antenna reflective face, be about to required feed and adjust to the center of the lower platform of six-degree-of-freedom parallel connection mechanism, realized on a signal focus the astronomical observation in the wider frequency range.
Actual measurement shows that the utility model actual location precision reaches 4mm, realized feed in the space the accurate location on a large scale and decide appearance, satisfied predetermined positioning accuracy request.
Description of drawings
Fig. 1 is the radio telescope structural representation of conventional rigidity
Fig. 2 is the antenna structure view of flexible support
Fig. 3 is a large-scale flexible radio telescope antenna control principle block diagram
Fig. 4 is a large-scale flexible radio telescope antenna structure view
Fig. 5 is the utility model multi-beam feed mechanism for automatically switching master TV structure schematic diagram
Fig. 6 is the utility model multi-beam feed mechanism for automatically switching plan structure schematic diagram
Fig. 7 is the utility model feed switching controls functional-block diagram
Embodiment
Followingly the utility model is described in further detail with reference to accompanying drawing.
The utility model is used for large-scale flexible radio telescope antenna structure shown in Figure 4, and this antenna arrangement at diameter is on the circumference of 500m, highly be the cylinder scope of 250m.The utility model mainly solves the driving problems of multiband wave beam feed automatic switchover problem and cable wire in this flexible antenna structure, uses the large-scale flexible antenna to need the requirement of broad frequency to realize astronomical observation.Fig. 5, Fig. 6, multiband wave beam feed automatic switching control equipment shown in Figure 7 have been adopted for this reason.Multiband wave beam feed automatic switching control equipment 10 of the present utility model is installed on the lower platform of six-degree-of-freedom parallel connection mechanism shown in Figure 48, promptly on the fine tuning platform 9.
With reference to Fig. 5 and Fig. 6, multi-beam feed automatic switching control equipment 10 of the present utility model is made up of axle 16, feed holding wire 17, drive motors 18, passive and synchronous belt wheel or gear 19, deceleration device 20, hollow support bearing 21, active synchronization belt wheel or the gear 22 of multiband feed 13, rotation platform 14, rotation platform.This multiband feed 13 adopts the multi-beam point-source feed of nine different frequency ranges, its operating frequency is 0.2GHz-8.8GHz, the feed of these different frequency ranges is distributed on the circular rotation platform 14, promptly in 360 degree scopes, per 40 degree are arranged the feed 13 of a wave band, the distribution center of circle of nine wave band feeds 13 overlaps with the center of circle of rotation platform 14, and its distribution radius of a circle is R.This rotation platform 14 is connected on the fine tuning platform 9 by hollow support bearing 21, and the center of the centre-to-centre spacing fine tuning platform 9 of hollow support bearing 21 also is the distribution circle radius R of nine wave band feeds 13.Rotation platform 14 is owing to be subjected to the support of hollow support bearing 21, and fine tuning platform 9 rotates along both forward and reverse directions 12 around spools 16 of rotation platform relatively.This nine frequency ranges feed holding wire 17 is connected in the feed cabin 6 shown in Figure 4 by hollow support bearing 21.Be connected with passive and synchronous belt wheel or gear 19 on the axle 16 of this rotation platform 14, and be connected to deceleration device 20 and drive motors 18, be subjected to the driving of deceleration device 20 and drive motors 18, rotation platform 14 rotations through active synchronization belt wheel or gear 22.During rotation, according to the needs of astronomical observation, according to the Spin Control of 40 degree, switch different frequency range feeds 13, it is adjusted to the center of the lower platform 9 of six-degree-of-freedom parallel connection mechanism 8, and promptly this nine frequency ranges feed takes turns to operate according to the needs of astronomical observation, just can realize the application in the wide frequency range.The platform center of this six-degree-of-freedom parallel connection mechanism lower platform 9 is the reflector focus of large-scale flexible radio telescope antenna reflective face, no matter carry out the astronomical observation of which frequency range, all need the feed of this frequency range is adjusted to the center of this platform, be on the reflector focus of large-scale flexible antenna reflective face, could obtain maximum signal reflex, for this reason, nine feeds 13 of the frequency range that these are different are switched by timesharing to be adjusted on the reflector focus of antenna reflective face, then can obtain maximum radio signal reflex, to be implemented on the signal focus to the astronomical observation in the wider frequency range.
With reference to Fig. 7, when the utility model carries out the automatic switchover of multi-beam feed, at first send the instruction of adjusting the feed wave band by large-scale flexible radio telescope antenna master control computer; After wave band feed controller receives the instruction of master control machine, according to the control algolithm that designs, pass through electrical driver, control mechanical actuator motions, the motion that is motor in the electrical driver drives the rotation platform rotation on the hollow bearing through slowing down and active and passive synchronous pulley or gear; In the process of rotation platform rotation, use checkout gear to detect the physical location of feed in real time simultaneously, and after will detecting the actual position information processing of feed, pass wave band feed controller back, realize closed-loop control; Again feed corresponding on the rotation platform is rotated to the center of the lower platform of six-degree-of-freedom parallel connection mechanism, it is the target location of wave band feed, meanwhile, with the physical location of detected feed and the implementation progress and the state of wave band feed controller, feed back to large-scale flexible antenna master control computer, make main control computer can understand its slave computer, i.e. the physical location of wave band feed controller and wave band feed.
The multiband feed 13 of the utility model multi-beam feed automatic switching control equipment is not limited to nine frequency ranges among the embodiment; for those skilled in the art; after having understood content of the present utility model; all may be under the situation that does not deviate from technical solutions of the utility model; carry out various corrections and change on form and the details, but these are based on the correction of the utility model thought with change still within claim protection range of the present utility model.
Claims (3)
1. the multi-beam feed automatic switching control equipment of a large-scale flexible radio telescope antenna, be installed on the lower platform of six-degree-of-freedom parallel connection mechanism in the feed cabin, be on the fine tuning platform (9), it is characterized in that this switching device shifter comprises: rotation platform (14), multiband feed (13), hollow support bearing (21), wave band feed controller, this multiband feed (13) is distributed on the rotation platform (14), support by hollow support bearing (21), can rotate relative to fine tuning platform (9).
2. multi-beam feed automatic switching control equipment according to claim 1, it is characterized in that multiband feed (13) is distributed on the rotation platform (14), be in 360 degree scopes, per 40 degree are arranged the feed of a wave band, the distribution center of circle of these wave band feeds (13) overlaps with the center of circle of rotation platform (14), this distribution radius of a circle is R, i.e. distance between the center of hollow support bearing (21) and rotation platform (14) center.
3. multi-beam feed automatic switching control equipment according to claim 1, it is characterized in that on the central shaft (16) of rotation platform (14), be connected with passive and synchronous belt wheel or gear (19) by hollow support bearing (21), this passive and synchronous belt wheel or gear (19) are connected on deceleration device (20) and the drive motors (18) through active synchronization belt wheel or gear (22), drive rotation platform (14) rotation by drive motors (18).
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| CN 200620079585 CN200941426Y (en) | 2006-08-14 | 2006-08-14 | Multi-beam feedback source auto switching gear of large-scale flexible radio telescope antenna |
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| CN 200620079585 CN200941426Y (en) | 2006-08-14 | 2006-08-14 | Multi-beam feedback source auto switching gear of large-scale flexible radio telescope antenna |
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| CN103490140A (en) * | 2013-09-22 | 2014-01-01 | 中国科学院国家天文台 | Large radio telescope with reflective surface unit self-adaptation connecting interface |
| CN104049252A (en) * | 2014-03-18 | 2014-09-17 | 中国电子科技集团公司第十研究所 | Method for multichannel dynamic grouping switching of multi-beam parabolic antennas |
| CN105811111A (en) * | 2016-03-11 | 2016-07-27 | 中国科学院新疆天文台 | Multi-band radio telescope rapid feed source switching method based on movable minor face |
| CN106099364A (en) * | 2016-08-03 | 2016-11-09 | 成都锦江电子系统工程有限公司 | The many feeds of a kind of high accuracy automatically change feedback system |
| CN107565217A (en) * | 2017-07-31 | 2018-01-09 | 中国电子科技集团公司第三十九研究所 | One-dimensional pendulum model Huan Kui mechanisms |
| CN110112536A (en) * | 2019-06-11 | 2019-08-09 | 中国电子科技集团公司第五十四研究所 | A kind of integrated form Radio Telescope Antenna for sun imaging observation |
| CN111044801A (en) * | 2018-10-12 | 2020-04-21 | 安立股份有限公司 | Antenna device and measuring method |
| CN111244631A (en) * | 2018-11-29 | 2020-06-05 | 安立股份有限公司 | Antenna device and measuring method |
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Cited By (19)
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| CN103490140B (en) * | 2013-09-22 | 2015-07-15 | 中国科学院国家天文台 | Large radio telescope with reflective surface unit self-adaptation connecting interface |
| CN103490140A (en) * | 2013-09-22 | 2014-01-01 | 中国科学院国家天文台 | Large radio telescope with reflective surface unit self-adaptation connecting interface |
| CN104049252A (en) * | 2014-03-18 | 2014-09-17 | 中国电子科技集团公司第十研究所 | Method for multichannel dynamic grouping switching of multi-beam parabolic antennas |
| CN104049252B (en) * | 2014-03-18 | 2016-10-05 | 中国电子科技集团公司第十研究所 | Multibeam parabolic surface antenna multichannel Dynamic Packet changing method |
| CN105811111B (en) * | 2016-03-11 | 2018-05-11 | 中国科学院新疆天文台 | A kind of multiband feed telescope fast switch over method based on movable minor face |
| CN105811111A (en) * | 2016-03-11 | 2016-07-27 | 中国科学院新疆天文台 | Multi-band radio telescope rapid feed source switching method based on movable minor face |
| CN106099364A (en) * | 2016-08-03 | 2016-11-09 | 成都锦江电子系统工程有限公司 | The many feeds of a kind of high accuracy automatically change feedback system |
| CN107565217A (en) * | 2017-07-31 | 2018-01-09 | 中国电子科技集团公司第三十九研究所 | One-dimensional pendulum model Huan Kui mechanisms |
| CN111044801B (en) * | 2018-10-12 | 2022-06-21 | 安立股份有限公司 | Antenna device and measuring method |
| CN111044801A (en) * | 2018-10-12 | 2020-04-21 | 安立股份有限公司 | Antenna device and measuring method |
| US11462841B2 (en) * | 2018-10-12 | 2022-10-04 | Anritsu Corporation | Antenna apparatus and measurement method |
| CN111244631A (en) * | 2018-11-29 | 2020-06-05 | 安立股份有限公司 | Antenna device and measuring method |
| CN111244631B (en) * | 2018-11-29 | 2022-05-10 | 安立股份有限公司 | Antenna device and measuring method |
| CN111490329A (en) * | 2019-01-29 | 2020-08-04 | 安立股份有限公司 | Antenna device and measuring method |
| CN111490329B (en) * | 2019-01-29 | 2021-04-30 | 安立股份有限公司 | Antenna device and measuring method |
| CN110112536A (en) * | 2019-06-11 | 2019-08-09 | 中国电子科技集团公司第五十四研究所 | A kind of integrated form Radio Telescope Antenna for sun imaging observation |
| CN110112536B (en) * | 2019-06-11 | 2024-03-22 | 中国电子科技集团公司第五十四研究所 | Integrated radio telescope antenna for solar imaging observation |
| CN111487473B (en) * | 2020-04-16 | 2022-07-19 | 中国科学院新疆天文台 | Automatic detection system and method for rapid radio storm |
| CN111487473A (en) * | 2020-04-16 | 2020-08-04 | 中国科学院新疆天文台 | Automatic detection system and method for rapid radio storm |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20140814 |
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| EXPY | Termination of patent right or utility model |