CN108709632A - A kind of vibration detection device and method of guy rope connection flexible structure - Google Patents
A kind of vibration detection device and method of guy rope connection flexible structure Download PDFInfo
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- CN108709632A CN108709632A CN201810764952.9A CN201810764952A CN108709632A CN 108709632 A CN108709632 A CN 108709632A CN 201810764952 A CN201810764952 A CN 201810764952A CN 108709632 A CN108709632 A CN 108709632A
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- flexible structure
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- guy rope
- vibration
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 17
- 230000000996 additive effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007430 reference method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses vibration detection devices and method that a kind of guy rope connects flexible structure, including flexible structure part, detection part and vibrational excitation part；The flexible structure part includes flexible structure, flexible fixation, rigid plate and flexible guy rope, the flexible structure is connected and composed by N row M row rigid plates, the detection part includes guide rail, high speed camera, holder and sliding block, the vibrational excitation part includes computer, power amplifier, signal generator and vibrator, the present invention can carry out non-contact measurement to measuring ontology, additive effect will not be brought to system, so that the strong robustness of system, obtains the more accurate vibration information of guy rope connection compliant mechanism.
Description
Technical field
The present invention relates to flexible structure vibration measurement fields, and in particular to a kind of vibration detection of guy rope connection flexible structure
Device and method.
Background technology
The power generation dress that the solar cell piece group and its supporting structure that the solar cell wing is combined by series and parallel mode form
It sets, it is connected with space station section structure, and when transmitting collapses and is fixed on section structure side wall, according to mission program after entering the orbit
By instruction unlock release, expansion and the tracking sun.According to the development of the external space station solar cell wing and applicable cases, completely
The space station solar cell wing usually requires to include solar battery array mechanism structure, solar cell and circuit and the stretching, extension of the solar cell wing
Several parts such as mechanism.
Non-contact measurement compares traditional sensor contact measurement and has many good qualities.Non-contact measurement does not interfere with
The dynamic property of measurand will not influence its normal work because of on testee additional mass, to measurand without
Damage and strong antijamming capability.But the precision of non-contact measurement is generally lower than contact type measurement.Non-contact measurement is
A kind of simple and effective vibration measuring method, common are the methods of laser vibration measurer, laser sensor, binocular vision system,
In, the binocular vision system vibration measuring method that is made of two high speed cameras with image procossing and analytical technology mature,
Increasingly become a kind of simple and convenient vibration measuring method with very high use value.It is a kind of multiple spot that high speed camera, which measures vibration,
Measurement method, compared to the method for the spot measurement of some, high speed camera measures vibration and is measuring the Mode variation of multiple points
When have prodigious advantage, as long as the resolution ratio of high speed camera and filming frequency are sufficiently high, the range of shooting is sufficiently large, only need
To make several upper mark points inside tested range, it can accurately measure the vibration of multiple points inside a range, obtain
The modal information of multiple points is taken, finally, binocular vision system can decouple the multi-modes of the vibration of testee, can
Complicated multi-modes to be reduced to the superposition of multiple first-order modals, the information of vibration is more intuitively showed.
Invention content
In order to overcome shortcoming and deficiency of the existing technology, the present invention to provide a kind of vibration of guy rope connection flexible structure
Detection device and method.
The present invention adopts the following technical scheme that：
A kind of vibration detection device of guy rope connection flexible structure, including flexible structure part, detection part and vibration swash
Encourage part；
The flexible structure part includes flexible structure, flexible fixation, rigid plate and flexible guy rope, the flexible structure
It is made of N row M row rigid plates, adjacent rigid plate is connected by flexible guy rope, and the flexible structure is fixed on by flexible guy rope
In flexible fixation；
The detection part includes guide rail, high speed camera, holder and sliding block, and the high speed camera is two, flexible structure
In the field range of two high speed cameras, high speed camera is fixed on by holder on sliding block, and sliding block moves on guide rail；
The vibrational excitation part includes computer, power amplifier, signal generator and vibrator, the computer with
High speed camera connects, and the signal generator, power amplifier and vibrator are sequentially connected.
The initial position of the high speed camera：Camera lens is in the center of flexible structure.
Rigid plate is the square aluminium sheet of 300mm × 300mm.
The flexibility guy rope is stretchy nylon rope, length 50mm.
Flexible guy rope is fixed on the quartering point of left and right two on each side of rigid plate.
The vibrator is two, is located at the both sides upper end of flexible structure, rack-mount by screw, institute
Holder is stated to be fixed on experimental bench.
A kind of method of the vibration detection device of guy rope connection flexible structure, includes the following steps：
The first step, signal generator send out vibration signal, and vibrator is sent after power amplifier amplifies, and vibrator passes through
Mandril encourages the vibration of flexible structure generation different frequency；
Second step is in vibration processes, and the binocular vision system that two high speed cameras are constituted is to vibration detection mark in rigid plate
Will point region synchronizes high frequency shooting, is sent in computer；
Third step computer extraction shooting image beam pattern obtains the coordinate of index point, obtains the vibration letter of flexible structure
Breath.
The index point is arranged in the geometric center position of square aluminium sheet.
Beneficial effects of the present invention：
(1) the drawbacks of being measured using binocular vision system, avoiding some traditional contact measurement methods, such as
It can cause additive effect, and to noise-sensitive, the precision of measurement is not high, the binocular vision system formed using two high speed cameras
Non-contact measurement is carried out to satellite antenna, robustness is relatively strong, can be carried out under various complicated and high certainty of measurement.
(2) use high speed camera that can carry out vibration monitoring to the multiple whole audience for vibrating ontology；The body of satellite antenna ontology
The product larger and high order mode vibration shape is complicated, using spot measurement instrument can not it is economical, effectively it is accurately measured, and
It can be to spraying all index points progress vibration monitoring on the body, well using the binocular vision system of high speed camera composition
Solves the above problem.
(3) measuring system is made of high speed camera, and the highest filming frequency of high speed camera is sufficiently large, can be to satellite antenna
Multi-modes measure；The excitation system of two vibrators composition can encourage shaking for the multi-modes of satellite antenna
It is dynamic, and it is that multi-modes couple to vibrate, by changing the quantity of index point and being marked on the distributing position on satellite antenna surface, this
The decoupling to former rank mode of oscillations of low frequency may be implemented in measuring system.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the front view of the present invention.
Specific implementation mode
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As Figure 1-Figure 2, a kind of vibration detection device of guy rope connection flexible structure, including flexible structure part, inspection
Survey part and vibrational excitation part.
The flexible structure part includes flexible structure, flexible fixation, rigid plate and flexible guy rope, the flexible structure
Connected and composed by the rigid plate 9 of N rows M row, N, M are integer, the present embodiment by three rows, eight 24 pieces of same sizes of row rigidity
Plate is connected and fixed by flexible guy rope 10 and flexible fixation 8, and specific mode is in every piece of rigid plate up and down each edge
Each two flexible guy ropes, two flexible guy ropes are located on the quartering point of left and right two on each side.Adjacent rigid plate passes through flexibility
Guy rope connects, the fixation that flexible fixation passes through flexible guy rope and adjacent rigid plate.Between per a line each item flexibility guy rope away from
It respectively connects guy rope for the half of rigid plate width from for 150mm and keeps axis consistent, to ensure the parallel of each ranks rigid plate
Degree and the verticality with experimental bench.
The flexible structure is fixedly connected by vertical square bar 7 with experimental bench 6, and connection guarantee predominantly detects region and reality
It is vertical to test platform, the experimental bench is made of aluminium section bar and corner fittings, and is mounted on experimental bench by screw.
In the present embodiment, experimental bench is assembled by the aluminium section bar that three kinds of length are respectively 3200mm, 1000mm, 500mm,
Table top is the stainless steel plate of one piece of 3320mm × 1120mm × 8mm, is connect with proximate matter by screw, each junction of proximate matter
There is angle bar to fix.The full-size that guy rope connects flexible structure is 2950mm × 1200mm, and rigid plate uses aluminium as material, soft
Property guy rope use nylon rope, flexible fixation uses the plastic material with certain elasticity, and when installation, which is tensioned flexible guy rope, to be made often
Capable rigid plate is maintained at sustained height, in same plane.
Detection part, including guide rail 2, high speed camera 3, holder 4 and sliding block 5, high speed camera have two, constitute binocular vision
System, high speed camera are connected to a fixed by holder and sliding block, and guide rail 2 is fixed on camera shelf 1, and sliding block 5 can be in guide rail 2
It is upper free to slide.By adjusting the mutual alignment between the position relationships such as the distance between camera shelf and experimental bench and camera
Relationship adapts to different shape and size of objects to be detected.The camera lens of the high speed camera 3 of the binocular vision system answers face soft
Property structure 9 plane of rigid plate, the distance of camera shelf and height should make the camera lens of binocular vision system be in flexible structure
Center makes binocular vision system take the whole of guy rope connection flexible structure.
The centre position that end face is located substantially at viewing field of camera is detected when high speed camera position should make flexible structure static, to protect
When demonstrate,proving flexible structure vibration, flexible structure ontology is in the field range of camera always, ensure that the continuity of measurement, camera
Optical axis is vertical with the measuring surface of flexible structure so that camera being capable of front its surface of shooting.
Two CCD camera measure system is divided into two kinds according to placement form：One is the reasons of two absolute parallel placements of camera
Think measurement model；One is the measurement models of two not parallel placements of camera optical axis.In practical applications, flat in absolute sense
Row is not present, and is not parallel placement model so in the application of Binocular vision photogrammetry.Industry level calculation at present
The scaling method of machine vision measurement it is multi-purpose be Zhang Zhengyou plane reference methods, when calibration, only needs a simple accurate calibration
Template, and stated accuracy is higher.
The present embodiment high speed camera selects the model Memrecam HX-3E of wound Lian Da Science and Technology Ltd.s in Wuhan
High speed camera, possess 5,000,000 pixels, and frame speed is up to 2000 frames/second under the full resolution, frame speed reaches under full HD pixel
4670 frames/second, 1,000,000 pixels assign 9220 frames/second, inside save as 64GB, and operating temperature range is 0-40 degrees Celsius, and weight is about
5.9 kilograms, the power supply needed is 100-240V AC-1.5A, 50-60Hz.
The vibrational excitation part includes computer, power amplifier, signal generator and vibrator, the computer 13
It is connect with high speed camera, the signal generator 15, power amplifier 14 and vibrator are sequentially connected.
Described two vibrators 11 are mounted on by screw on holder 12, and the Position of Vibrating of vibrator is made to be located at flexible structure
Upper end, be connected with flexible fixation by mandril, the direction of excitation of mandril is horizontal direction.It is sent out not by signal generator
It is transmitted to vibrator after power amplifier amplifies with corresponding signal is vibrated, flexible fixation is encouraged by mandril, is made soft
Property structure generate vibration, generating various forms of patterns by changing the phase official post flexible structure of sinusoidal signal of vibration shakes
It is dynamic.
By sending out different accumulation signals to two vibrators, keep the sinusoidal signal phase of the vibration of vibrator different,
So that flexible structure ontology is generated different modal vibrations, such as swashs when vibrator receives the identical sinusoidal signal of mode of flexural vibration frequency
It encourages, vibrator presses the identical excitation of phase, then film deployed configuration is encouraged to generate bending vibration；When two vibrators are received and turned round
When turning the identical sinusoidal signal excitation of modal frequency, two vibrators are encouraged by identical signal and opposite in phase, then encourage production
The twisting vibration of raw film deployed configuration.
In the present invention, signal generator sends out vibration signal, and vibrator, exciting are sent to after power amplifier amplifies
Device encourages guy rope to connect the vibration that flexible structure generates different frequency by mandril；The binocular vision system that two high speed cameras are constituted
System synchronizes high frequency shooting to rigid plate, and acquisition image sequence is sent to computer.Computer extraction image spot is marked
The coordinate of will point, processing obtain the vibration information of flexible structure, carry out visualization processing, and index point is separately positioned on square aluminium
The geometric center position of plate, the centrally disposed index point of each square aluminium sheet.
Dotted line in Fig. 1 indicates the line relationship between each equipment, and direction arrow, which is shown, detects and controls signal
The direction of transfer of stream.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (8)
1. a kind of vibration detection device of guy rope connection flexible structure, which is characterized in that including flexible structure part, detection part
And vibrational excitation part；
The flexible structure part includes flexible structure, flexible fixation, rigid plate and flexible guy rope, and the flexible structure is by N
Row M row rigid plates are constituted, and adjacent rigid plate is connected by flexible guy rope, and the flexible structure is fixed on flexibility by flexible guy rope
On fixed frame；
The detection part includes guide rail, high speed camera, holder and sliding block, and the high speed camera is two, and flexible structure is two
In the field range of platform high speed camera, high speed camera is fixed on by holder on sliding block, and sliding block moves on guide rail；
The vibrational excitation part includes computer, power amplifier, signal generator and vibrator, the computer and high speed
Camera connects, and the signal generator, power amplifier and vibrator are sequentially connected.
2. vibration detection device according to claim 1, which is characterized in that the initial position of the high speed camera：Camera lens
Center in flexible structure.
3. vibration detection device according to claim 1, which is characterized in that rigid plate is the square of 300mm × 300mm
Aluminium sheet.
4. vibration detection device according to claim 1, which is characterized in that the flexibility guy rope is stretchy nylon rope, long
Degree is 50mm.
5. according to claim 1-4 any one of them vibration detection devices, which is characterized in that flexible guy rope is fixed on rigid plate
On the quartering point of left and right two on each side.
6. vibration detection device according to claim 1, which is characterized in that the vibrator is two, is located at soft
The both sides upper end of property structure, rack-mount by screw, the holder is fixed on experimental bench.
7. the method that the vibration detection device of flexible structure is connected according to a kind of guy rope of claim 1-6 any one of them,
It is characterized in that, includes the following steps：
The first step, signal generator send out vibration signal, and vibrator is sent after power amplifier amplifies, and vibrator passes through mandril
Flexible structure is encouraged to generate the vibration of different frequency；
Second step is in vibration processes, and the binocular vision system that two high speed cameras are constituted is to vibration detection index point in rigid plate
Region synchronizes high frequency shooting, is sent in computer；
Third step computer extraction shooting image beam pattern obtains the coordinate of index point, obtains the vibration information of flexible structure.
8. the method according to the description of claim 7 is characterized in that the geometric center in square aluminium sheet is arranged in the index point
Position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764952.9A CN108709632B (en) | 2018-07-12 | 2018-07-12 | Vibration detection device and method for guy cable connection flexible structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764952.9A CN108709632B (en) | 2018-07-12 | 2018-07-12 | Vibration detection device and method for guy cable connection flexible structure |
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| Publication Number | Publication Date |
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| CN108709632A true CN108709632A (en) | 2018-10-26 |
| CN108709632B CN108709632B (en) | 2020-09-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110095242A (en) * | 2019-05-29 | 2019-08-06 | 华南理工大学 | A kind of the reflecting surface vibration detection device and method of umbrella antenna |
| CN110108347A (en) * | 2019-05-13 | 2019-08-09 | 安徽理工大学 | A kind of device and method of flexible cantilever vibration of beam non-contact measurement and Untouched control |
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| CN107168398A (en) * | 2017-06-16 | 2017-09-15 | 华南理工大学 | Flexible wing vibration detection and control device and method based on high speed camera |
| CN206892604U (en) * | 2017-06-16 | 2018-01-16 | 华南理工大学 | Flexible hinged plate vibration control apparatus based on Binocular vision photogrammetry |
| CN208366458U (en) * | 2018-07-12 | 2019-01-11 | 华南理工大学 | A kind of vibration detection device of guy rope connection flexible structure |
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2018
- 2018-07-12 CN CN201810764952.9A patent/CN108709632B/en not_active Expired - Fee Related
Patent Citations (4)
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| CN102519378A (en) * | 2011-11-30 | 2012-06-27 | 华南理工大学 | Device for measuring bending and torsional vibration of hinged plate of phase-sensitive detector (PSD) sensor and method for device |
| CN107168398A (en) * | 2017-06-16 | 2017-09-15 | 华南理工大学 | Flexible wing vibration detection and control device and method based on high speed camera |
| CN206892604U (en) * | 2017-06-16 | 2018-01-16 | 华南理工大学 | Flexible hinged plate vibration control apparatus based on Binocular vision photogrammetry |
| CN208366458U (en) * | 2018-07-12 | 2019-01-11 | 华南理工大学 | A kind of vibration detection device of guy rope connection flexible structure |
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| LINGBO XIE 等: "Vibration control of a flexible clamped-clamped plate based on an improved FULMS algorithm and laser displacement measurement", 《MECHANICAL SYSTEMS AND SIGNAL PROCESSING》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108347A (en) * | 2019-05-13 | 2019-08-09 | 安徽理工大学 | A kind of device and method of flexible cantilever vibration of beam non-contact measurement and Untouched control |
| CN110095242A (en) * | 2019-05-29 | 2019-08-06 | 华南理工大学 | A kind of the reflecting surface vibration detection device and method of umbrella antenna |
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