CN108375347A - A kind of FAST radio telescopes reflecting surface unit accuracy measurement system and method - Google Patents
A kind of FAST radio telescopes reflecting surface unit accuracy measurement system and method Download PDFInfo
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- CN108375347A CN108375347A CN201810162368.6A CN201810162368A CN108375347A CN 108375347 A CN108375347 A CN 108375347A CN 201810162368 A CN201810162368 A CN 201810162368A CN 108375347 A CN108375347 A CN 108375347A
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- reflecting surface
- surface unit
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- drive system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of FAST radio telescopes reflecting surface unit accuracy measurement system and methods, belong to engineering measuring technology field.Present system includes the first track, railcar and control unit；Railcar includes portal frame and the first drive system, and the first drive system is for driving the portal frame to be moved along first track；Crossbeam is equipped with camera car, is additionally provided with the second drive system for driving camera car along cross beam movement between camera car and crossbeam, sets by rotary platform that there are one cameras on camera car；First drive system, the second drive system and rotary platform are connect with control unit, and camera is also connect with control unit.Structure of the invention is ripe, easy to implement, greatly improves the working efficiency of the similar reflecting surface unit precision measure of big quantity shape, the technology towards monomer has been carried out to the realization of engineering batch by feasible method, be a kind of important improvement to the prior art.
Description
Technical field
The present invention relates to engineering measuring technology fields, are suitable for measurement object quantity mostly and the similar operating mode of shape, especially
It is the precision engineering survey situation for the Active Reflector unit in FAST radio telescope engineerings.
Background technology
FAST radio telescopes, i.e. 500 meters of bore spherical radio telescopes（Five-hundred-meter Aperture
Spherical radio Telescope）, it is using the hollow hole of Guizhou Karst Region as dressing table location of looking in the distance, the generation of construction
The first big single port diameter radio telescope of boundary, for national big science engineering.
The reflecting surface of FAST radio telescopes is the spherical surface of 500 meters of diameter, and area is up to 250,000 square metres, about 30 football pitchs
Size, entire reflecting surface are made of 4450 pieces of reflecting surface units.Whole reflecting surface units is according to specific in reflecting surface
The difference of position is divided into four types, respectively rope net centre type reflecting surface unit, rope net referring concurrently to respective structure type
Peripheral type reflecting surface unit measures foundation pier type reflecting surface unit and basic model reflecting surface unit.Wherein basic model reflecting surface list
First quantity is 4275 pieces, accounts for the 95% of sum, is the major part of reflecting surface unit.
Basic model reflecting surface unit is all the close and similar to each other triangular structure of size, side size range be 10m~
13m, area are generally the ㎡ of 55 ㎡~68.Telescope requires the root mean square precision in overall reflective face in use to reach 3 R.M.S
（Root Meam Square, root mean square）, the root mean square precision of every piece of reflecting surface unit is just needed to reach 2 according to precision decomposition
R.M.S。
In view of the design feature of reflecting surface unit and the execution conditions at scene, reflecting surface unit must be built in telescope
If scene is assembled, in order to ensure deliver reflecting surface unit qualification, it is necessary to after reflecting surface unit is completed to its into
Row precision measure can be delivered, and installed into telescope if precision is considered as qualification less than 2 R.M.S, if
Precision is exceeded, needs to readjust, until qualified.For measuring work generally, 4450 pieces of reflecting surface lists of FAST engineerings
Member, the workload that surface figure accuracy measures may be more than 6000 times（It is calculated with 1.5 times of element number）It is even more.Thus, instead
The important process that influences project performance of the precision measure work as telescope construction site of face unit is penetrated, workload is special
It is not huge.And in the industry in view of the works such as the construction period of project anxiety and the pre-production of reflecting surface unit and later stage lifting
Hold, by comprehensively measuring and calculating, then requires scene to must assure that at least 20 pieces daily of precision measure task, this means that at the scene
Need the measurement of 30 module units of completion daily.
Traditional measurement method includes mainly that laser tracker measures, the methods of total station survey and digital Photogrammetry, but
Be due to these measurement methods adapt to working site and severe field outdoor environmental conditions etc. inefficiency or not and
The requirement of FAST project progress cannot be met.And if measurement efficiency is low, necessarily there are two significant problems：One, scene is spelled
Dress, lifting cannot be implemented according to plan, and engineering is caused to drag phase and economic loss；Two, in order to compress the duration, measurement and adjustment process are not
Finely, reflecting surface unit surface figure accuracy is not high.As it can be seen that a large amount of and execution conditions at difficult task and scene form it is serious
Contradiction needs the methods of research and innovation to solve.
Invention content
In view of this, a kind of FAST radio telescopes reflecting surface unit accuracy measurement system of present invention proposition and method,
Can engineering precision measurement quickly, accurately and efficiently be carried out to a large amount of and similar reflecting surface units.
Based on above-mentioned purpose, technical solution provided by the invention is：
A kind of FAST radio telescopes reflecting surface unit accuracy measurement system comprising the first track, railcar and control unit；
First track includes two single tracks for being separated by a certain distance and being mutually parallel, and the railcar includes portal frame and
One drive system, the portal frame include two frame legs and the crossbeam that is arranged between two frame legs, and two frame legs are respectively about
On Shu Yi single track, first drive system is for driving the portal frame to be moved along first track；
The crossbeam is equipped with camera car, is additionally provided between the camera car and crossbeam for driving camera car along cross beam movement
Second drive system, sets by rotary platform that there are one cameras on the camera car；
First drive system, the second drive system and rotary platform connect with described control unit and by control lists
The control of member, the camera connect with described control unit and image data are transferred to described control unit.
Optionally, first drive system includes the rail wheel being arranged on two frame legs and for driving rail wheel
The motor of rotation, the portal frame are constrained in by rail wheel on first track.
Optionally, the crossbeam is equipped with the second track, and second drive system includes being arranged on the camera car
Motor and idler wheel, the idler wheel constrains in second track.
Optionally, described control unit is for executing following procedure：
（A1）The image under current camera position is obtained by the camera；
（A2）By the first drive system or the second drive system control the rotary platform be moved to according to both fixed tracks it is next
Camera position, controls the rotational action of rotary platform and controls camera and obtain new image at this location；Both the orbit determination
Mark is to be formed by sinuous coherent track, the adjacent crossbeam position in beam head or Liang Weichu connections by adjacent crossbeam position
Set refer to crossbeam when railcar is moved along the first track former and later two positions；
（A3）The image repeatedly obtained is summarized, therefrom identifies each reflecting surface unit；
（A4）Image information by acquiring the measurement markers object being arranged in reflecting surface unit in advance obtains each reflecting surface list
The measurement digital information of member, and melted the measurement digital information of the same reflecting surface unit in multiple images by approximating method
It is combined into the integrated digital information of the reflecting surface unit；The measurement markers object includes for providing the one of reference system group of coding mark
It will, multiple retro-reflective targets for providing measurement point position, the orientation stick for marking retro-reflective targets directional information and is used for
Station meter as full-length；
（A5）The integrated digital information is compared with reflecting surface unit master pattern, obtains the face type of the reflecting surface unit
Precision.
Optionally, the both ends of the station meter are equipped with refractive body, and the distance between described refractive body is micron accuracies
Preset length.
Optionally, the coding maker scattering device is between the retro-reflective targets of the reflecting surface unit.
In addition, the present invention also provides a kind of FAST radio telescopes reflecting surface unit accuracy measurement methods comprising as follows
Step：
（B1）FAST radio telescopes reflecting surface unit accuracy measurement system as described above is set；
（B2）Reflecting surface list is arranged between two single tracks of the FAST radio telescopes reflecting surface unit accuracy measurement system
Member；The reflecting surface unit is equipped with measurement markers object, and the measurement markers object includes for providing the one of reference system group of coding
Mark, multiple retro-reflective targets for providing measurement point position, the orientation stick for marking retro-reflective targets directional information and use
In the station meter as full-length；
（B3）The coordinated movement of various economic factors of the first drive system, the second drive system and rotary platform is controlled by control unit so that institute
It states the camera of FAST radio telescope reflecting surface unit accuracy measurement systems to move with both fixed tracks, and in the more of both fixed tracks
The image of reflecting surface unit in a preset points acquisition visual field；Both the fixed track is by adjacent crossbeam position in Liang Shouhuo
Liang Weichu connections are formed by sinuous coherent track, when the adjacent crossbeam position refers to that railcar is moved along the first track
Former and later two positions of crossbeam；
（B4）The image that the camera obtains is summarized, therefrom identifies each reflecting surface unit；
（B5）Image information by acquiring the measurement markers object being arranged in reflecting surface unit in advance obtains each reflecting surface list
The measurement digital information of member, and melted the measurement digital information of the same reflecting surface unit in multiple images by approximating method
It is combined into the integrated digital information of the reflecting surface unit；
（B6）The integrated digital information is compared with reflecting surface unit master pattern, obtains the face type of the reflecting surface unit
Precision.
Optionally, the both ends of the station meter are equipped with refractive body, and the distance between described refractive body is micron accuracies
Preset length.
Optionally, the reflecting surface unit along first track extending direction linear arrangement in an orderly manner, it is adjacent
Spacing between two reflecting surface units is 1~1.5 meter.
Optionally, between retro-reflective targets of the coding maker scattering device in a reflecting surface unit.
From narration above as can be seen that the advantageous effect of technical solution of the present invention is：
1, the present invention realizes the automatic measurement of the similar reflecting surface unit of big quantity shape, improves measurement efficiency, saves significantly
Time of measuring is saved.
2, it needs measuring apparatus to be in eminence due to photogrammetric, is frequently necessary to worker in traditional method and climbs up climb down.
The climbing that the present invention does not need survey crew is ascended a height, to reduce security risk.
3, the present invention overcomes certain weather conditions, round-the-clock can implement, not by the environment shadow such as strong daylight, rainy
It rings.
4, it entirely measures and data handling procedure does not need manual intervention, automation, intelligent measuring may be implemented, save
Manpower, reduces the labor intensity of operating personnel.
In short, structure of the invention is ripe, and it is easy to implement, greatly improve the similar reflecting surface unit precision of big quantity shape
Technology towards monomer has been carried out the realization of engineering batch by the feasible method of science by the working efficiency of measurement, is to existing
There is a kind of important improvement of technology.
Description of the drawings
In order to clearly describe this patent, one or more attached drawing is provided below, these attached drawings are intended to this patent
Background technology, technical principle and/or certain specific embodiments make aid illustration.It should be noted that these attached drawings can
It can not also provide some to provide and have been described and belong to known in those of ordinary skill in the art often at this patent word segment
The detail of knowledge；Also, because those skilled in the art can combine the published word content of this patent completely
And/or accompanying drawing content, more attached drawings, therefore these attached drawings below are designed in the case where not paying any creative work
Can cover can not also cover all technical solutions that this patent word segment is described.In addition, these attached drawings is specific interior
Contain and the word content in conjunction with this patent is needed to be determined, when word content and some apparent knot in these attached drawings of this patent
When structure is not consistent, it is this to need the narration of common knowledge and this patent other parts in conjunction with this field to carry out comprehensive descision on earth
There are exist to draw mistake in clerical mistake or attached drawing for the word segment of patent.Particularly, the following drawings is the figure of exemplary in nature
Piece, it is not intended that imply the protection domain of this patent, those skilled in the art are by reference to the text disclosed in this patent
Word content and/or accompanying drawing content can design more attached drawings in the case where not paying any creative work, these are new
Technical solution representated by attached drawing is still within the protection domain of this patent.
Fig. 1 is the structural schematic diagram of reflecting surface unit；
Fig. 2 is the placement schematic diagram of station meter and marker in reflecting surface unit；
Fig. 3 is a kind of use state reference chart of FAST radio telescope reflecting surface unit accuracy measurement systems；
Fig. 4 is the vertical view of Fig. 3；
Fig. 5 is a kind of structure and motion mode schematic diagram of FAST radio telescope reflecting surface unit accuracy measurement systems；
Fig. 6 is the partial enlarged view of camera car in Fig. 5；
Fig. 7 is the movement locus schematic diagram of camera in FAST radio telescope reflecting surface unit accuracy measurement systems.
Specific implementation mode
Understanding for the ease of those skilled in the art to the art of this patent scheme, meanwhile, in order to make the technology of this patent
Purpose, technical solution and advantageous effect are clearer, and the protection domain of claims is made fully to be supported, below with tool
The form of body case makes further, more detailed description to the technical solution of this patent.
As shown in Fig. 1~7, a kind of FAST radio telescopes reflecting surface unit accuracy measurement system comprising the first track,
Railcar and control unit；
First track includes two single tracks 10 for being separated by a certain distance and being mutually parallel, the railcar include portal frame and
First drive system, the portal frame include two frame legs 7 and the crossbeam 8 that is arranged between two frame legs, and two frame legs 7 divide
It does not constrain on a single track 10, first drive system is for driving the portal frame to be moved along first track；
The crossbeam 8 is equipped with camera car 9, is additionally provided between the camera car 9 and crossbeam 8 for driving camera car to be moved along crossbeam
The second dynamic drive system, sets by rotary platform 91 that there are one cameras 92 on the camera car 9；
First drive system, the second drive system and rotary platform connect with described control unit and by control lists
The control of member, the camera connect with described control unit and image data are transferred to described control unit.
Optionally, still see that Fig. 5, first drive system include the rail wheel 11 being arranged on two frame legs 7 and use
In the motor of driving rail wheel rotation（It is not shown）, the portal frame constrained in by rail wheel on first track.
Optionally, the crossbeam is equipped with the second track, and second drive system includes being arranged on the camera car
Motor and idler wheel, the idler wheel constrains in second track.
Optionally, described control unit is for executing following procedure：
（A1）The image under current camera position is obtained by the camera；
（A2）The camera, which is controlled, by the first drive system or the second drive system is moved to next take the photograph according to both fixed tracks
Image position, and new image is obtained at this location；Both the fixed track is by adjacent crossbeam position in beam head or Liang Weichu
Connection is formed by sinuous coherent track（As shown in fig. 7, the meander line in figure indicates that both fixed tracks, circle indicate both orbit determination
Several camera shooting positions on mark）, the adjacent crossbeam position refer to when railcar is moved along the first track crossbeam former and later two
Position；
（A3）The image repeatedly obtained is summarized, therefrom identifies each reflecting surface unit；
（A4）Image information by acquiring the measurement markers object being arranged in reflecting surface unit in advance obtains each reflecting surface list
The measurement digital information of member, and melted the measurement digital information of the same reflecting surface unit in multiple images by approximating method
It is combined into the integrated digital information of the reflecting surface unit；The measurement markers object includes for providing the one of reference system group of coding mark
It will, multiple retro-reflective targets for providing measurement point position, the orientation stick for marking retro-reflective targets directional information and is used for
Station meter as full-length；
（A5）The integrated digital information is compared with reflecting surface unit master pattern, obtains the face type of the reflecting surface unit
Precision.
In addition, still seeing shown in Fig. 1~7, the present invention also provides a kind of FAST radio telescopes reflecting surface unit precision measures
Method comprising following steps：
（B1）FAST radio telescopes reflecting surface unit accuracy measurement system 1 as described above is set；
（B2）Reflecting surface list is arranged between two single tracks of the FAST radio telescopes reflecting surface unit accuracy measurement system 1
Member 2；The reflecting surface unit 2 is equipped with the measurements such as one group of coding maker 3, multiple retro-reflective targets 4, station meter 5 and orientation stick 6
Marker；
（B3）The movement of the first drive system, the second drive system and rotary platform is controlled by control unit so that described
The camera of FAST radio telescope reflecting surface unit accuracy measurement systems is moved with both fixed tracks, and in the multiple of both fixed tracks
Preset points acquire the image of reflecting surface unit（As shown in Figure 7）；Both the fixed track is by adjacent crossbeam position in beam head
Or Liang Weichu connections are formed by sinuous coherent track, the adjacent crossbeam position refers to that railcar is moved along the first track
When crossbeam former and later two positions；
（B4）The image repeatedly obtained is summarized, therefrom identifies each reflecting surface unit 2；
（B5）Image information by acquiring the measurement markers object being arranged in reflecting surface unit in advance obtains each reflecting surface list
The measurement digital information of member, and melted the measurement digital information of the same reflecting surface unit in multiple images by approximating method
It is combined into the integrated digital information of the reflecting surface unit；
（B6）The integrated digital information is compared with reflecting surface unit master pattern, obtains the face type of the reflecting surface unit
Precision.
Optionally, the both ends of the station meter 5 are equipped with refractive body, and the distance between described refractive body is micron accuracies
Preset length.
Optionally, it still sees figures 3 and 4, extending direction in an orderly manner line of the reflecting surface unit 2 along first track
Property arrangement, the spacing between two neighboring reflecting surface unit is 1~1.5 meter.
Optionally, still see that Fig. 2, the coding maker 3 are uniformly arranged between the retro-reflective targets 4 in reflecting surface unit 2.
In above-described embodiment, 2 main body of reflecting surface unit is that triangle is actually answered since the size of reflecting surface unit is larger
In a reflecting surface unit be also by several small triangulars at.The present invention measuring method be：It is adopted first from camera
The location information that measurement markers object is identified in the image of collection is fitted to an entirety by software, then passes through orientation
Stick identifies direction and establishes the position that reference system precise marking goes out each retro-reflective targets by coding maker, then with station meter
Length in physical length calibration image so that other each information element response variations, it is accurate anti-under actual conditions to obtain
Location information between light target mark compares the master pattern of these information and reflecting surface unit, to be finally completed reflection
The precision of face unit is calculated.
In the above-described embodiments, FAST radio telescopes reflecting surface unit accuracy measurement system includes mainly that longitudinal walking fills
It sets, horizontal walking device and rotary platform, so that camera can carry out two dimensional surface movement and Three dimensional rotation.Wherein,
Longitudinal running gear allows camera to be moved in the orientation of reflecting surface unit, and horizontal walking device makes camera
Forward or backward action can be completed in the vertical direction of reflecting surface unit orientation, and rotary platform makes camera can
To carry out angular turn in the original location.
In addition, in above-mentioned measuring process, reflecting surface unit is preferably able to regularly put, and is given birth to not only for specification
Production, it is also possible that measuring system can more easily distinguish unit individual, to improve the reliability of system.
Similarly, the suggestion of the measurement markers object such as coding maker, retro-reflective targets and station meter also carry out it is regular put, and it is corresponding
It is put into close positions as possible in each unit；Meanwhile in order to ensure that every image as much as possible can be matched to remaining image,
Coding maker is preferably evenly placed upon the marginal position of reflecting surface unit as possible.
In measurement process, on the one hand control unit receives the image of camera acquisition, on the other hand the first driving of control system
The movement of system, the second drive system and rotary platform, wherein certain algorithm may be used so that control unit can be according to shadow
As information adjusts motion control instruction in real time, so that the adjacent image acquired twice of camera has redundancy appropriate, it is convenient for
Acquire the fusion in image later stage.
In short, structure of the invention is ripe, and it is easy to implement, greatly improve the similar reflecting surface unit precision of big quantity shape
Technology towards monomer has been carried out the realization of engineering batch by the feasible method of science by the working efficiency of measurement, is to existing
There is a kind of important improvement of technology.
It is to be appreciated that be intended merely to facilitate this field common for the above-mentioned narration for this patent specific implementation mode
Technical staff understands this patent scheme and the exemplary description enumerated, does not imply that the protection domain of this patent is limited solely to
In this few example, those of ordinary skill in the art completely can the art of this patent scheme is made fully understand under the premise of,
In the form of not paying any creative work, by taking combination technique feature to each example cited by this patent, replacing
More technical characteristics etc. mode is added in some technical characteristics, obtains more specific implementation modes, all these specific implementations
Mode is within the covering scope of patent claims book, and therefore, these new specific implementation modes also should be in this patent
Protection domain within.
In addition, for the purpose for simplifying narration, this patent may also not enumerate some ordinary specific embodiments, this
A little schemes are that those of ordinary skill in the art can expect naturally after understanding the art of this patent scheme, it is clear that this
A little schemes should also be included within the protection domain of this patent.
For the purpose for simplifying narration, above-mentioned each specific implementation mode may only up to for the extent of disclosure of technical detail
The degree that can voluntarily make a decision to those skilled in the art, that is, there is no disclosed technical detail for above-mentioned specific implementation mode,
Those of ordinary skill in the art completely can be in the case where not paying any creative work, in filling for the art of this patent scheme
Divide under prompt, by means of textbook, reference book, paper, patent, audio-visual product etc., open source literature is completed, alternatively, this
A little details are the contents that can voluntarily be maked decision according to actual conditions under being generally understood of those of ordinary skill in the art.
As it can be seen that even if these underground technical details, the open adequacy of the art of this patent scheme will not be impacted.
In short, on the basis of combining explanation effect of the patent specification to claims protection domain, it is any
Fall into the specific embodiment of patent claims book covering scope, within the protection domain of this patent..
Claims (10)
1. a kind of FAST radio telescopes reflecting surface unit accuracy measurement system, which is characterized in that including the first track, railcar
And control unit；
First track includes two single tracks for being separated by a certain distance and being mutually parallel, and the railcar includes portal frame and
One drive system, the portal frame include two frame legs and the crossbeam that is arranged between two frame legs, and two frame legs are respectively about
On Shu Yi single track, first drive system is for driving the portal frame to be moved along first track；
The crossbeam is equipped with camera car, is additionally provided between the camera car and crossbeam for driving camera car along cross beam movement
Second drive system, sets by rotary platform that there are one cameras on the camera car；
First drive system, the second drive system and rotary platform connect with described control unit and by control lists
The control of member, the camera connect with described control unit and image data are transferred to described control unit.
2. FAST radio telescopes reflecting surface unit accuracy measurement system according to claim 1, which is characterized in that described
First drive system includes the rail wheel being arranged on two frame legs and the motor for driving rail wheel to rotate, described gantry
Frame is constrained in by rail wheel on first track.
3. FAST radio telescopes reflecting surface unit accuracy measurement system according to claim 1, which is characterized in that described
Crossbeam is equipped with the second track, and second drive system includes the motor and idler wheel being arranged on the camera car, described
Idler wheel constrains in second track.
4. FAST radio telescopes reflecting surface unit accuracy measurement system according to claim 1, which is characterized in that described
Control unit is for executing following procedure：
（A1）The image under current camera position is obtained by the camera；
（A2）By the first drive system or the second drive system control the rotary platform be moved to according to both fixed tracks it is next
Camera position, controls the rotational action of rotary platform and controls camera and obtain new image at this location；Both the orbit determination
Mark is to be formed by sinuous coherent track, the adjacent crossbeam position in beam head or Liang Weichu connections by adjacent crossbeam position
Set refer to crossbeam when railcar is moved along the first track former and later two positions；
（A3）The image repeatedly obtained is summarized, therefrom identifies each reflecting surface unit；
（A4）Image information by acquiring the measurement markers object being arranged in reflecting surface unit in advance obtains each reflecting surface list
The measurement digital information of member, and melted the measurement digital information of the same reflecting surface unit in multiple images by approximating method
It is combined into the integrated digital information of the reflecting surface unit；The measurement markers object includes for providing the one of reference system group of coding mark
It will, multiple retro-reflective targets for providing measurement point position, the orientation stick for marking retro-reflective targets directional information and is used for
Station meter as full-length；
（A5）The integrated digital information is compared with reflecting surface unit master pattern, obtains the face type of the reflecting surface unit
Precision.
5. FAST radio telescopes reflecting surface unit accuracy measurement method according to claim 4, which is characterized in that described
The both ends of station meter are equipped with refractive body, and the distance between described refractive body is the preset length of micron accuracies.
6. FAST radio telescopes reflecting surface unit accuracy measurement method according to claim 4, which is characterized in that described
Coding maker scattering device is between the retro-reflective targets of the reflecting surface unit.
7. a kind of FAST radio telescopes reflecting surface unit accuracy measurement method, which is characterized in that include the following steps：
（B1）FAST radio telescopes reflecting surface unit accuracy measurement system as described in claim 1 is set；
（B2）Reflecting surface list is arranged between two single tracks of the FAST radio telescopes reflecting surface unit accuracy measurement system
Member；The reflecting surface unit is equipped with measurement markers object, and the measurement markers object includes for providing the one of reference system group of coding
Mark, multiple retro-reflective targets for providing measurement point position, the orientation stick for marking retro-reflective targets directional information and use
In the station meter as full-length；
（B3）The coordinated movement of various economic factors of the first drive system, the second drive system and rotary platform is controlled by control unit so that institute
It states the camera of FAST radio telescope reflecting surface unit accuracy measurement systems to move with both fixed tracks, and in the more of both fixed tracks
The image of reflecting surface unit in a preset points acquisition visual field；Both the fixed track is by adjacent crossbeam position in Liang Shouhuo
Liang Weichu connections are formed by sinuous coherent track, when the adjacent crossbeam position refers to that railcar is moved along the first track
Former and later two positions of crossbeam；
（B4）The image that the camera obtains is summarized, therefrom identifies each reflecting surface unit；
（B5）Image information by acquiring the measurement markers object being arranged in reflecting surface unit in advance obtains each reflecting surface list
The measurement digital information of member, and melted the measurement digital information of the same reflecting surface unit in multiple images by approximating method
It is combined into the integrated digital information of the reflecting surface unit；
（B6）The integrated digital information is compared with reflecting surface unit master pattern, obtains the face type of the reflecting surface unit
Precision.
8. FAST radio telescopes reflecting surface unit accuracy measurement method according to claim 7, which is characterized in that described
The both ends of station meter are equipped with refractive body, and the distance between described refractive body is the preset length of micron accuracies.
9. FAST radio telescopes reflecting surface unit accuracy measurement method according to claim 7, which is characterized in that described
Reflecting surface unit along first track extending direction linear arrangement in an orderly manner, between two neighboring reflecting surface unit
Spacing is 1~1.5 meter.
10. FAST radio telescopes reflecting surface unit accuracy measurement method according to claim 7, which is characterized in that institute
It states between retro-reflective targets of the coding maker scattering device in a reflecting surface unit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341631A (en) * | 2018-11-14 | 2019-02-15 | 中国科学院国家天文台 | A kind of telescope reflecting surface automatic calibration method |
| CN111256664A (en) * | 2020-01-20 | 2020-06-09 | 中国科学院国家天文台 | Spherical radio telescope reflecting surface measuring system and method |
| CN111649728A (en) * | 2020-04-26 | 2020-09-11 | 中国科学院国家天文台 | Spherical radio telescope reflecting surface node planning and measuring system and method |
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| CN109341631B (en) * | 2018-11-14 | 2020-05-26 | 中国科学院国家天文台 | Automatic calibration method for telescope reflecting surface |
| CN111256664A (en) * | 2020-01-20 | 2020-06-09 | 中国科学院国家天文台 | Spherical radio telescope reflecting surface measuring system and method |
| CN111649728A (en) * | 2020-04-26 | 2020-09-11 | 中国科学院国家天文台 | Spherical radio telescope reflecting surface node planning and measuring system and method |
| CN111649728B (en) * | 2020-04-26 | 2022-05-06 | 中国科学院国家天文台 | Spherical radio telescope reflecting surface node planning and measuring system and method |
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Application publication date: 20180807 |