CN207215414U - Satellite antenna structural vibration measurement apparatus based on non-contact measurement - Google Patents
Satellite antenna structural vibration measurement apparatus based on non-contact measurement Download PDFInfo
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- CN207215414U CN207215414U CN201720708249.7U CN201720708249U CN207215414U CN 207215414 U CN207215414 U CN 207215414U CN 201720708249 U CN201720708249 U CN 201720708249U CN 207215414 U CN207215414 U CN 207215414U
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- satellite antenna
- vibration
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- vibrational excitation
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Abstract
The utility model discloses a kind of satellite antenna structural vibration measurement apparatus based on non-contact measurement, described device includes satellite antenna body part, vibrational excitation part, vibration detecting part, signal processing module and computer, signal processing module is signaled to vibrational excitation part, vibrational excitation partial activation satellite antenna body part produces vibration, vibration detecting part synchronizes high frequency shooting to the vibration detection index point region of satellite antenna body part, collect image sequence, it is sent to computer, by image procossing and analysis, obtain the vibration information of satellite antenna.Satellite antenna structural vibration measurement apparatus of the present utility model forms binocular vision system by two high speed cameras, non-contact measurement can be carried out to vibration body well, additive effect will not be brought to system, so that the strong robustness of system, the measuring environment of Various Complex is can adapt to, therefore it is of a relatively high to measure the precision obtained.
Description
Technical field
It the utility model is related to flexible structure vibration measurement field, and in particular to a kind of satellite based on non-contact measurement
Antenna structure vibration measurement device.
Background technology
As the information age arrives, the interaction between information becomes a closely coupled important bridge of the world today
Beam.Information-based development promotes the quick increasing of the information services such as personal communication, express network, military communication and mobile communication
It is long.Satellite antenna also develops as a ring important in information exchange towards the direction of high-capacity and high-speed rate.In military field,
Large-scale satellite antenna be in detection, Reconnaissance system receive satellite-signal important device, in personal communication, satellite phone it is general
And the facility of TV signal is received with grapefruit satellite antenna so that the application of grapefruit satellite antenna becomes very universal.In general,
The bore of satellite antenna is bigger, and the quality of reception is higher, but due to the pot face of satellite antenna be made up of flexible material it is larger
Curved surface, when running into wind, by the percussion of wind, easily produce judder.During satellite antenna use, vibration is held
Satellite antenna is easily set to produce mechanical fatigue, under stress and strain effect, at one or some places produce damage, by one section
After time, when damage accumulation to a certain extent when, the surface of satellite antenna even support will be cracked or occurred prominent
The fracture of hair property.Vibration is not single to be only affected to the normal work of satellite antenna, reduces signal receiving quality, reduces making for it
With the life-span, in addition satellite antenna can be caused it is badly damaged cause it to scrap, cause unnecessary economic loss.Such a
Under background, suppress the vibration of satellite antenna, improve the antivibration of satellite antenna, wind loading rating turns into inside satellite antenna field one
Important problem.
Non-contact measurement contrasts traditional sensor contact measurement and had many good qualities.Its strong interference immunity, to quilt
It is lossless to survey object, does not influence the dynamic property of measurand, also will not influence it because of additional mass is increased on testee
Normal work.When in face of some special impalpable object (such as high temp objects), contact measurement just " nothing in a helpless situation
Plan ", and non-contact measurement can " an exhibition chief ".But the precision of non-contact measurement generally compares contact type measurement
It is low.In the field of measurement vibration, non-contact measurement is a kind of simple and effective vibration measuring method, common are vibration measurement with laser
The methods of instrument, laser sensor, binocular vision system, there is measurement accuracy height, fast response time.Wherein, by two
The binocular vision system vibration measuring method of high speed camera composition with image procossing and the technology of analysis development and it is ripe increasingly
As a kind of simple and convenient vibration measuring method with very high practical value.Binocular vision system vibration measuring method has much excellent
Point：First, this measuring method is simple in construction, it is not necessary to LASER Light Source and other servicing units；Secondly, high speed camera measurement
Vibration is a kind of multimetering method, and compared to the method for some spot measurements, high speed camera measurement vibration is multiple in measurement
With very big advantage when the Mode variation of point, as long as the resolution ratio of high speed camera and filming frequency are sufficiently high, shooting
Scope is sufficiently large, it is only necessary to which several mark points on making inside tested scope, it can accurately be measured inside a scope
The vibration of multiple points, obtain the modal information of multiple points；Finally, binocular vision system can be to the multistage of the vibration of testee
Mode is decoupled, and the multi-modes of complexity can be reduced to the superposition of multiple first-order modals, and the information of vibration is more straight
Show with seeing.
Utility model content
The purpose of this utility model is the shortcomings that being directed to existing satellite antenna structural vibration e measurement technology and deficiency, there is provided
A kind of satellite antenna structural vibration measurement apparatus based on non-contact measurement, the binocular vision system formed using high speed camera
System carries out high frequency shooting to the index point of satellite antenna surface tested region, obtains image sequence, coordinates respective image processing, divides
Analysis, obtain the vibration information of satellite antenna.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of satellite antenna structural vibration measurement apparatus based on non-contact measurement, including satellite antenna body part,
Vibrational excitation part, vibration detecting part, signal processing module and computer, the satellite antenna body part include satellite day
Line and base, satellite antenna are fixedly connected on experimental bench I by base, and vibration detection is also coated with satellite antenna surface
Index point；The vibrational excitation part includes two vibrators, and two vibrators are symmetrically mounted on the two bottom sides of satellite antenna,
It is fixed on experimental bench I, and the support of satellite antenna is connected to by vibrator push rod；The vibration detecting part includes two
The binocular vision system of high speed camera composition, two high speed cameras are arranged on two sliding blocks by two support frames respectively, and two
Individual sliding block can be moved on guide rail, and guide rail is fixed on experimental bench II, the alignment lenses satellite antenna table of binocular vision system
The index point of surface vibration detection；Signal processing module is signaled to vibrational excitation part, vibrational excitation partial activation satellite day
Line body part produces vibration, and vibration detecting part synchronizes to the vibration detection index point region of satellite antenna body part
High frequency is shot, and is collected image sequence, is sent to computer, by image procossing and analysis, obtains the vibration letter of satellite antenna
Breath.
Further, the signal processing module includes power amplifier and signal generator.
Further, signal generator sends vibration signal, is sent to two vibrators after power amplifier amplifies, and two
Individual vibrator encourages satellite antenna to produce vibration by vibrator push rod respectively, during satellite antenna vibrates, by two
The binocular vision system of high speed camera composition synchronizes high frequency shooting, collection to the vibration detection index point region of satellite antenna
To image sequence, computer is sent to, by image procossing and analysis, obtains the vibration information of satellite antenna.
Further, the quantity of the vibration detection index point on the satellite antenna surface and position can be according to satellite antennas
Shape size and the vibration information of satellite antenna that goes for of gauger carry out designed, designed.
Further, described two vibrators encourage the vibration of satellite antenna mode of flexural vibration by vibrator push rod respectively and turned round
Turn modal vibration；When two vibrators are received with mode of flexural vibration frequency identical sinusoidal signal excitation, two vibrators are pressed
Identical signal and the identical excitation of phase, then excitation produce the flexural vibrations of satellite antenna；When two vibrators are received and reversed
During modal frequency identical sinusoidal signal excitation, two vibrators are encouraged by identical signal and opposite in phase, then encourage generation to defend
The twisting vibration of star antenna.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, satellite antenna structural vibration measurement apparatus of the present utility model forms binocular vision system by two high speed cameras,
Non-contact measurement can be carried out to vibration body well, additive effect will not be brought to system so that the robustness of system
By force, the measuring environment of Various Complex is can adapt to, therefore it is of a relatively high to measure the precision obtained.
2nd, satellite antenna because its volume it is big, the vibration shape is complicated, if can not be carried out with spot measurement mode to it economical, effectively
Ground measures, and satellite antenna structural vibration measurement apparatus of the present utility model is using the multimetering mode of binocular vision system to defending
Star antenna body is monitored, can be to satellite antenna by changing the quantity of index point and the position on satellite antenna
Multi-modes coupled vibrations is decoupled, accurately the Vibration Condition of reduction vibration body.
3rd, the utility model using guide rail, sliding block, support frame composition can horizontal displacement holder device, coordinate adjustable
The support of angle, composition one can horizontal displacement, the binocular vision system of adjustable angle, satellite antenna can be carried out polygonal
Degree, multi-faceted measurement, in many experiments, with the vibration of different angle and position measurement satellite antenna, can be obtained more smart
Accurate satellite antenna vibration characteristics.
Brief description of the drawings
Fig. 1 is that satellite antenna structural vibration measurement apparatus of the utility model embodiment 1 based on non-contact measurement is always shown
It is intended to.
Fig. 2 is that satellite antenna structural vibration measurement apparatus of the utility model embodiment 1 based on non-contact measurement is overlooked
Figure.
Fig. 3 is that satellite antenna structural vibration measurement apparatus of the utility model embodiment 1 based on non-contact measurement is faced
Figure.
Fig. 4 is to be shaken in satellite antenna structural vibration measurement apparatus of the utility model embodiment 1 based on non-contact measurement
The schematic diagram of dynamic detection part.
Wherein, 1- satellite antennas, 2- bases, 3- experimental benches I, 4- vibrators, 5- high speed cameras, 6- support frames, 7- guide rails,
8- sliding blocks, 9- experimental benches II, 10- computers, 11- power amplifiers, 12- signal generators.
Embodiment
The utility model is described in further detail with reference to embodiment and accompanying drawing, but implementation of the present utility model
Mode not limited to this.
Embodiment 1：
As shown in Figure 1-Figure 3, a kind of satellite antenna structural vibration based on non-contact measurement is present embodiments provided to survey
Measure device, including satellite antenna body part, vibrational excitation part, vibration detecting part, signal processing module and computer
(10), the satellite antenna body part includes satellite antenna (1) and base (2), and satellite antenna (1) is fixed by base (2)
It is connected on experimental bench I (3), axis and the horizontal plane of satellite antenna (1) form a general angle of 65 °, in satellite day
Line (1) surface is also coated with the index point of vibration detection；The vibrational excitation part includes two vibrators (4), two excitings
Device (4) is symmetrically mounted on the two bottom sides of satellite antenna (1), the distance between two vibrators (4) about 1000mm, fixed
On experimental bench I (3), and it is connected to by vibrator push rod the support of satellite antenna (1)；The signal of the vibration detecting part
For figure as shown in figure 4, including the binocular vision system of two high speed camera (5) compositions, two high speed cameras (5) pass through two respectively
Support frame (6) is arranged on two sliding blocks (8), and two sliding blocks (8) can move on guide rail (7), and guide rail (7) is fixed on experiment
On platform II (9), the index point of alignment lenses satellite antenna (1) surface vibration detection of binocular vision system；Signal processing module
Vibrational excitation part is signaled to, vibrational excitation partial activation satellite antenna body part produces vibration, vibration detecting part
High frequency shooting is synchronized to the vibration detection index point region of satellite antenna body part, image sequence is collected, is sent to
Computer (10), by image procossing and analysis, obtain the vibration information of satellite antenna (1).
Wherein, the signal processing module includes power amplifier (11) and signal generator (12).Signal generator
(12) vibration signal is sent, two vibrators (4) are sent to after power amplifier (11) amplification, two vibrators (4) are respectively
Satellite antenna (1) is encouraged to produce vibration by vibrator push rod, during satellite antenna (1) vibrates, by two high speed phases
The binocular vision system of machine (5) composition synchronizes high frequency shooting, collection to the vibration detection index point region of satellite antenna (1)
To image sequence, computer (10) is sent to, by image procossing and analysis, obtains the vibration information of satellite antenna (1).
Further, the quantity of the vibration detection index point on satellite antenna (1) surface and position can be according to satellites
The vibration information for the satellite antenna (1) that the shape size of antenna (1) and gauger go for carrys out designed, designed.It is described two
Vibrator (4) encourages the vibration of satellite antenna (1) mode of flexural vibration and torsion mode to vibrate by vibrator push rod respectively；Swash when two
When the device (4) that shakes is received with mode of flexural vibration frequency identical sinusoidal signal excitation, two vibrators (4) press identical signal and phase
Identical excitation, then excitation produce the flexural vibrations of satellite antenna (1)；When two vibrators (4) receive and Torsion mode frequency
During identical sinusoidal signal excitation, two vibrators (4) are encouraged by identical signal and opposite in phase, then excitation produces satellite antenna
(1) twisting vibration.
In the present embodiment, from the model JZK-50 of GST companies of U.S. production vibrator, this swashs vibrator (4)
Device maximum of shaking exciting force is 500N, and peak swing is ± 12.5mm, and peak acceleration 55g, maximum input current is 30Arms,
Frequency range is DC-2k, and appearance and size is Φ 240mm × 345mm, and the way of output is to transmit power to satellite day by vibrator push rod
On line bracket.The subsequent corrosion of satellite antenna (1) is 1800mm, and the section radius of " pot mouth " are 1500mm, are highly about
2000mm, support and satellite antenna pot are zinc-plated as material, surface by aluminium.High speed camera (5) selects Japanese Photron companies
Model FASTCAM-SA4 high-speed camera, speed of taking pictures can reach when image resolution ratio is 1024 × 1024 pixel
To 3600fps, 13500fps can be reached when image resolution ratio is 512 × 512 pixel, be 256 × 256 in image resolution ratio
45000fps can be reached during pixel, can reach 125000fps when image resolution ratio is 128 × 128 pixel, in image point
Resolution can reach 500000fps when being 128 × 16 pixel, inside save as 64GB, and operating temperature range is 0~40 degree Celsius, weight
Amount be about 5.9kg, it is necessary to power supply be 100V~240V AC~1.5A, 50~60Hz.Power amplifier (11) uses U.S. AR
The model 50WD1000 of company power amplifier, working frequency are DC~1000MHz.
Embodiment 2：
Present embodiments provide a kind of satellite antenna structural vibration measuring method based on non-contact measurement, methods described
Comprise the following steps：
Step 1: signal generator (12) sends vibration signal, being sent to two after power amplifier (11) amplification swashs
Shake device (4), and two vibrators (4) encourage satellite antenna (1) to produce vibration by vibrator push rod respectively；
Step 2: during satellite antenna (1) vibrates, the binocular vision system that is made up of two high speed cameras (5)
High frequency shooting is synchronized to the vibration detection index point region of satellite antenna (1), image sequence is collected, is sent to computer
(10), by image procossing and analysis, the vibration information of satellite antenna (1) is obtained.
By changing the parameter of exciting, test repeatedly, obtain many experiments result, it is possible to obtain satellite antenna (1)
Vibration characteristics.
It is described above, only the utility model patent preferred embodiment, but the protection domain of the utility model patent is simultaneously
This is not limited to, any one skilled in the art is in the scope disclosed in the utility model patent, according to this
The technical scheme of utility model patent and its inventive concept are subject to equivalent substitution or change, belong to the guarantor of the utility model patent
Protect scope.
Claims (1)
- A kind of 1. satellite antenna structural vibration measurement apparatus based on non-contact measurement, it is characterised in that：Including satellite antenna Body part, vibrational excitation part, vibration detecting part, signal processing module and computer, the satellite antenna body part Including satellite antenna and base, satellite antenna is fixedly connected on experimental bench I by base, is also coated with satellite antenna surface The index point of vibration detection；The vibrational excitation part includes two vibrators, and two vibrators are symmetrically mounted on satellite antenna Two bottom sides, be fixed on experimental bench I, and the support of satellite antenna is connected to by vibrator push rod；The vibration detection Part includes the binocular vision system of two high speed camera compositions, and two high speed cameras are arranged on two by two support frames respectively On individual sliding block, two sliding blocks can be moved on guide rail, and guide rail is fixed on experimental bench II, the alignment lenses of binocular vision system The index point of satellite antenna surface vibration detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720708249.7U CN207215414U (en) | 2017-06-16 | 2017-06-16 | Satellite antenna structural vibration measurement apparatus based on non-contact measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720708249.7U CN207215414U (en) | 2017-06-16 | 2017-06-16 | Satellite antenna structural vibration measurement apparatus based on non-contact measurement |
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| Publication Number | Publication Date |
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| CN207215414U true CN207215414U (en) | 2018-04-10 |
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ID=61811750
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186482A (en) * | 2018-09-30 | 2019-01-11 | 华南理工大学 | A kind of the digital speckle deformation detecting device and method of elliptical cylinder-shape shell |
| WO2021052020A1 (en) * | 2019-04-26 | 2021-03-25 | 深圳市豪视智能科技有限公司 | Vibration testing system |
| CN112928426A (en) * | 2021-02-25 | 2021-06-08 | 上海卫星工程研究所 | Large-scale deployable satellite antenna profile precision in-orbit active control device and method |
-
2017
- 2017-06-16 CN CN201720708249.7U patent/CN207215414U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186482A (en) * | 2018-09-30 | 2019-01-11 | 华南理工大学 | A kind of the digital speckle deformation detecting device and method of elliptical cylinder-shape shell |
| WO2021052020A1 (en) * | 2019-04-26 | 2021-03-25 | 深圳市豪视智能科技有限公司 | Vibration testing system |
| CN112928426A (en) * | 2021-02-25 | 2021-06-08 | 上海卫星工程研究所 | Large-scale deployable satellite antenna profile precision in-orbit active control device and method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180410 Termination date: 20200616 |
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| CF01 | Termination of patent right due to non-payment of annual fee |