CN207559994U - A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus - Google Patents
A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus Download PDFInfo
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- CN207559994U CN207559994U CN201721415057.3U CN201721415057U CN207559994U CN 207559994 U CN207559994 U CN 207559994U CN 201721415057 U CN201721415057 U CN 201721415057U CN 207559994 U CN207559994 U CN 207559994U
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Abstract
The utility model proposes a kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus, including antenna sway platform, CCD camera assembly, calibration plate component and cross scale scoring ring；Tested antenna is mounted on antenna sway platform, and camera is mounted on tested antenna paraboloid top or bottom end, and camera optical axis is parallel with tested antenna paraboloid geometrical central axis；Calibration plate component includes tracking cross, calibration plate, beacon antenna, beacon antenna fixed frame and calibration plate adjustment frame；Calibration plate is mounted on calibration plate adjustment frame, and beacon antenna and tracking cross are mounted on calibration plate；Calibration plate is parallel with tested Antenna aperture；Beacon antenna center and tracking cross center are in same vertical direction, and distance is equal to camera optical axis and tested antenna paraboloid geometrical central axis distance；Cross scale scoring ring pastes on the computer screen.The utility model can carry out the small size antennas such as communication in moving electric axis calibration and tracking accuracy detect, substantially reduce calibration and testing cost by inexpensive device and simple and practicable method.
Description
Technical field
The utility model belongs to mobile tracking field of communication technology, is particularly suitable for small low-cost antenna measurement field,
Specially a kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus.
Background technology
Satellite communications system is mounted on mobile vehicle (such as automobile, train, aircraft, steamer etc.),
The system of real-time Communication for Power is realized in motion process by geosynchronous satellite, and to ensure the energy in the quick motion process of carrier
It reaches normal and communicates incessantly.
Can the antenna of satellite communications system keep being accurately aimed at satellite in carrier movement, be communication in moving satellite
The basic guarantee of communication system communication performance.Therefore it measures antenna for satellite communication in motion alignment target and tracks the precision of relative motion target
It is the important technology in the field.
At present, in this field for detecting there are mainly two types of the methods of satellite communications system antenna tracking accuracy.
It is a kind of by the use of the quality of image is transmitted as the judgement benchmark of tracking accuracy, operation principle is on mobile vehicle communication in moving station
Image is transmitted to base station with certain power and transmission bit rate, picture signal is received in base station, with the image received
The length of the quality of quality, the number of missing image or drop-out time distinguishes the quality of the communication in moving system tracking performance.The
Two kinds of methods are judged with the situation of change of spectrum analyzer record received signal level, and operation principle is in main website
The reception termination spectrum analyzer of (or movement station), the satellite beacon or mobile terminal obtained by spectrum analyzer measurement are sent out
The size of signal judge the quality of antenna tracking.
Above-mentioned first method simple, intuitive, but quantitative analysis cannot be made to antenna tracking system；Second method
Although communication quality can be gone out from the variation quantitative response of signal level, because signal level includes other errors on channel,
It cannot correctly reflect precision of the antenna tracking to satelloid, and the price of high-precision spectrum analyzer in itself is also fairly expensive.
In addition in production is assembled, the angle of the electrical boresight of antenna and horizontal reference, the needs such as the registration of electric axis and geometrical axis
It is demarcated.Calibration needs the calibration field with larger area and High-precision angle encoder, and calibration cost is high, the period is long, no
Suitable for batch production.
Invention content
It is of the existing technology to solve the problems, such as, the utility model proposes a kind of satellite communications system antenna with
Track accuracy detecting device conveniently can carry out the small size antennas such as communication in moving electric axis calibration and tracking accuracy detects, make
Achieve the purpose that be easy to implement, function is extensive, cost-effective, measurement effect is good.
The technical solution of the utility model is：
A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus, it is characterised in that：It is shaken including antenna
It sets a table, CCD camera assembly, calibration plate component and cross scale scoring ring；
Tested satellite communications system antenna can be mounted on antenna sway platform, and the antenna sway platform can
Tested satellite communications system antenna is driven to swing；
The CCD camera assembly includes camera, camera adjustment frame and display computer；Camera is mounted on camera
On adjustment frame, camera adjustment frame be mounted on tested satellite communications system antenna paraboloid on the top of vertical direction or
Person bottom end, and camera optical axis is parallel with tested satellite communications system antenna paraboloid geometrical central axis；Camera with
Display computer is connected, and can show the image of shooting on display computer screen；
The calibration plate component includes tracking cross, calibration plate, beacon antenna, beacon antenna fixed frame and the adjustment of calibration plate
Frame；Calibration plate be mounted on calibration plate adjustment frame on, beacon antenna be mounted on beacon antenna fixed frame on, beacon antenna fixed frame with
And tracking cross is mounted on calibration plate；Calibration plate can be adjusted to tested communication in moving by adjusting calibration plate adjustment frame and defended
Star communication system antenna mouth face is parallel；The beacon antenna center and tracking cross center are in same vertical direction, and beacon
Center of antenna is equal to camera optical axis with tracking cross centre distance and tested satellite communications system antenna paraboloid is several
What central shaft distance；
The cross scale scoring ring is attached on the screen of display computer, when tested satellite communications system antenna is thrown
When object plane geometrical central axis is directed at beacon antenna center, the cross intersection point of adjustment cross scale scoring ring makes itself and showing on display screen
The cross searching of the tracking cross picture shown overlaps, and fixed cross scale scoring ring.
Further preferred embodiment, a kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus are special
Sign is：Calibration plate and the distance of tested satellite communications system antenna are not less than S：
The receives frequency of wherein λ=300/f, f for antenna, unit MHz；D is antenna aperture, and unit m, S are calibration
The space length of plate and tested antenna, unit m.
Advantageous effect
The utility model proposes Dongzhongtong satellite communication system antenna tracking precision testing apparatus, low cost can be passed through
Device and simple and practicable method, electric axis calibration and tracking accuracy are carried out to small size antennas such as communication in moving and detected, is substantially reduced
Calibration and testing cost.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the antenna tracking signal source structure principle chart of the utility model embodiment；
Fig. 2 is the camera adjustment frame structure diagram of the utility model embodiment；
Fig. 3 is the cross scale scoring ring schematic diagram of the utility model embodiment；
Fig. 4 is the tracking error test equipment figure of the utility model embodiment；
In figure：1- tilters, 2- antennas, 3- antenna paraboloids, the 4- electrical boresight of antenna, 5- camera adjustment frames, 6- cameras,
7- tracking crosses, 8- calibration plates, 9- beacon antennas, 10- beacon antenna fixed frames, 11- calibration plate adjustment frames, 501- camera shooting head rests
Frame, 502- adjustment coupling tubes, 503- flanges adjustment pipe, 504- installing plates.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that the utility model
Limitation.
In the description of the present invention, it is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, be only for
Convenient for description the utility model and simplify description rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
As shown in Figure 1, the Dongzhongtong satellite communication system antenna tracking precision testing apparatus in the present embodiment, including antenna
Tilter, CCD camera assembly, calibration plate component and cross scale scoring ring.
Tested satellite communications system antenna can be mounted on antenna sway platform, and the antenna sway platform can
Tested satellite communications system antenna is driven to be swung according to sets requirement, simulates the movement of mobile vehicle.
The CCD camera assembly includes camera, camera adjustment frame and display computer；Camera is mounted on camera
On adjustment frame, camera adjustment frame be mounted on tested satellite communications system antenna paraboloid on the top of vertical direction or
Person bottom end, and camera optical axis is parallel with tested satellite communications system antenna paraboloid geometrical central axis；Camera with
Display computer is connected, and can show the image of shooting on display computer screen.It should be noted that camera should have
For enough multiple optical zoom multiples convenient for the measurement accuracy of enhancing optical axis, camera weight will be gently, it is impossible to produce antenna breadth
Change type.
The calibration plate component includes tracking cross, calibration plate, beacon antenna, beacon antenna fixed frame and the adjustment of calibration plate
Frame；Calibration plate be mounted on calibration plate adjustment frame on, beacon antenna be mounted on beacon antenna fixed frame on, beacon antenna fixed frame with
And tracking cross is mounted on calibration plate；Calibration plate can be adjusted to tested communication in moving by adjusting calibration plate adjustment frame and defended
Star communication system antenna mouth face is parallel；The beacon antenna center and tracking cross center are in same vertical direction, and beacon
Center of antenna is equal to camera optical axis with tracking cross centre distance and tested satellite communications system antenna paraboloid is several
What central shaft distance.
The cross scale scoring ring is attached on the screen of display computer, when tested satellite communications system antenna is thrown
When object plane geometrical central axis is directed at beacon antenna center, the cross intersection point of adjustment cross scale scoring ring makes itself and showing on display screen
The cross searching of the tracking cross picture shown overlaps, and fixed cross scale scoring ring.
Assembling camera adjustment frame 5 as shown in Figure 2 is fastened to adjustment coupling tube with screw by head bracket 501 is imaged first
502, then adjustment coupling tube 502 and flange adjustment pipe 503 are angularly pre-tightened with screw, it is convenient subsequently to the miniature tune of camera 6
It is whole, then flange adjustment pipe 503 is fixed to 2 top of antenna, preparation installation camera 6 with screw；Then beacon antenna is fixed
Frame 10 is connected firmly with beacon antenna 9, is installed to after connecting firmly on calibration plate 8.
During assembling, camera 6 is fixed on camera shooting head bracket 501 with screw first, ensures that camera optical axis is parallel to
Antenna 2 is then fixed to 1 face center of tilter by paraboloid geometrical central axis, and tilter 1 rises to centre position, and (preparation is shaken
Pendulum)；Secondly calibration plate adjustment frame 11 is fixed to vertical state at 20~30 meters of antenna and is parallel to 2 mouthfuls of antenna
Calibration plate 8 is fastened on calibration plate adjustment frame 11 by face with screw, when tracking cross 7 is mounted on calibration plate 8, with antenna parabolic
The principle that the distance of face geometrical central axis to 6 optical axis of camera is equal to 7 center of tracking cross to beacon antenna centre distance is installed,
Finally when antenna paraboloid geometrical central axis is directed at beacon antenna 9, by the cross intersection point and screen display of cross scale scoring ring
Tracking cross picture intersection point overlap after cross scale scoring ring is cemented on the computer screen, will adjustment coupling tube 502 fasten,
Complete assembling.
The method that satellite communications system antenna tracking accuracy detection is carried out using above device, including following step
Suddenly：
Step 1：Calibration plate adjustment frame is adjusted, makes calibration plate parallel with tested satellite communications system Antenna aperture；
By tested satellite communications system antenna paraboloid geometrical central axis alignment beacon antenna center, cross scale scoring ring is adjusted
Cross intersection point overlap the cross searching of its tracking cross picture with the display on display screen, and fixed cross scale scoring ring.
It should be noted that school plate has with the space length of tested antenna and the bore of tested antenna and antenna receives frequency
It closes.Its most short space length can pass through formula
It calculates, the receives frequency of 300/f, f for antenna, unit MHz；D is antenna aperture, and unit m, S are calibration plate
With the space length of tested antenna, unit m.
Minimum test distance can be calculated by above-mentioned formula in different antennas, with the validity of guarantee test and accurately
Property.Simultaneously to avoid the interference of signal ground return, during the beacon source installed on tested antenna alignment calibration plate, pitching angle is extremely
It should be greater than 6 ° less.
Step 2：Radio Beacon, signal source frequency ranging from 12.25~13.25GHz are opened, rotary antenna searches out antenna and connects
The position of signal maximum is received, and whether the cross searching for observing tracking cross picture on calibration plate captured by camera is carved with cross
It spends scoring ring center to overlap, if overlapping, shows the electrical boresight of antenna and antenna paraboloid geometric center overlapping of axles, otherwise adjust antenna electric
Axis, until the electrical boresight of antenna and antenna paraboloid geometric center overlapping of axles；
Step 3：Control antenna sway platform is swung according to sets requirement, is tested the entrance pair of satellite communications system antenna
The tracing mode of beacon antenna observes captured by camera the cross searching of tracking cross picture and cross scale scoring ring on calibration plate
The bias at center obtains tracking error value.
In order to read tracking error value directly from cross scale scoring ring, need to the scale on cross scale scoring ring
It is demarcated：
Antenna alignment beacon emissions source, camera focal length mix up rear fixed, the cross of calibration plate in computer screen
The cross searching of cursor picture is overlapped with cross scale scoring ring center on screen.Calibration is taken the photograph with calibration plate actual size and camera
The imaging size of plate on the computer screen is engineer's scale, is calculated according to geometrical principle, calculates cross light when antenna rotates 0.1 °
The theoretical offset distance at center deviation beacon antenna center, theoretical offset distance divided by engineer's scale are marked, obtains cross scale target
0.1 ° of calibration data calculates 0.2 ° to 1.5 ° of calibration data successively, and the graduation mark of cross scale scoring ring is drawn with this.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it is impossible to be construed as a limitation of the present invention, those of ordinary skill in the art are not departing from the utility model
Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and
Modification.
Claims (1)
1. a kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus, it is characterised in that：Including antenna sway platform, take the photograph
As head assembly, calibration plate component and cross scale scoring ring；
Tested satellite communications system antenna can be mounted on antenna sway platform, and the antenna sway platform can drive
Tested satellite communications system antenna is swung；
The CCD camera assembly includes camera, camera adjustment frame and display computer；Camera is adjusted mounted on camera
On frame, camera adjustment frame is mounted on tested satellite communications system antenna paraboloid at the top of vertical direction or bottom
End, and camera optical axis is parallel with tested satellite communications system antenna paraboloid geometrical central axis；Camera and display
Computer is connected, and can show the image of shooting on display computer screen；
The calibration plate component includes tracking cross, calibration plate, beacon antenna, beacon antenna fixed frame and calibration plate adjustment frame；
Calibration plate be mounted on calibration plate adjustment frame on, beacon antenna be mounted on beacon antenna fixed frame on, beacon antenna fixed frame and
Tracking cross is mounted on calibration plate；By adjust calibration plate adjustment frame calibration plate can be adjusted to tested communication in moving satellite
Communication system antenna mouth face is parallel；The beacon antenna center and tracking cross center are in same vertical direction, and beacon day
Line center is equal to camera optical axis and tested satellite communications system antenna paraboloid geometry with tracking cross centre distance
Central shaft distance；
The cross scale scoring ring is attached on the screen of display computer, when tested satellite communications system antenna paraboloid
When geometrical central axis is directed at beacon antenna center, the cross intersection point of adjustment cross scale scoring ring makes itself and the display on display screen
The cross searching of tracking cross picture overlaps, and fixed cross scale scoring ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721415057.3U CN207559994U (en) | 2017-10-30 | 2017-10-30 | A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus |
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| CN201721415057.3U CN207559994U (en) | 2017-10-30 | 2017-10-30 | A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707296A (en) * | 2017-10-30 | 2018-02-16 | 西安坤蓝电子技术有限公司 | A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus and method |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707296A (en) * | 2017-10-30 | 2018-02-16 | 西安坤蓝电子技术有限公司 | A kind of Dongzhongtong satellite communication system antenna tracking precision testing apparatus and method |
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