CN208366458U - A kind of vibration detection device of guy rope connection flexible structure - Google Patents
A kind of vibration detection device of guy rope connection flexible structure Download PDFInfo
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- CN208366458U CN208366458U CN201821110362.6U CN201821110362U CN208366458U CN 208366458 U CN208366458 U CN 208366458U CN 201821110362 U CN201821110362 U CN 201821110362U CN 208366458 U CN208366458 U CN 208366458U
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- flexible structure
- flexible
- vibration
- guy rope
- high speed
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Abstract
The utility model discloses a kind of vibration detection devices of guy rope connection 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 column rigid plate, the detection part includes guide rail, high speed camera, holder and sliding block, the vibrational excitation part includes computer, power amplifier, signal generator and vibration excitor, the utility model can carry out non-contact measurement to measurement 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 utility model relates to flexible structure vibration measurement fields, and in particular to a kind of vibration of guy rope connection flexible structure
Detection device.
Background technique
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 and applicable cases of the external space station solar cell wing, 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 will not influence
The dynamic property of measurand, will not because of influencing its normal work 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.High speed camera measurement vibration is a kind of multiple spot
Measurement method, compared to the method for some spot measurements, high speed camera measurement vibration is measuring the Mode variation of multiple points
When with very big 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 inside a range the multiple points of precise measurement vibration, obtain
The modal information of multiple points is taken, finally, binocular vision system can decouple the multi-modes of the vibration of testee, it can
Complicated multi-modes to be reduced to the superposition of multiple first-order modals, show the information of vibration is more intuitive.
Utility model content
In order to overcome shortcoming and deficiency of the existing technology, the utility model provides a kind of guy rope connection flexible structure
Vibration detection device.
The utility model adopts the following technical solution:
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 column rigid plate, adjacent rigid plate passes through flexible guy rope connection, 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 sliding block by holder, and sliding block moves on guide rail；
The vibrational excitation part includes computer, power amplifier, signal generator and vibration excitor, the computer with
High speed camera connection, the signal generator, power amplifier and vibration excitor 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 vibration excitor is two, is located at the two sides upper end of flexible structure, rack-mount by screw, institute
Bracket is stated to be fixed on experimental bench.
The course of work of the utility model:
Signal generator issues vibration signal, and vibration excitor is sent after power amplifier amplifies, and vibration excitor is swashed by mandril
Encourage the vibration that flexible structure generates different frequency；
The binocular vision system that two high speed cameras are constituted synchronizes height to vibration detection index point region in rigid plate
Frequency is shot, and is sent in computer；
Computer extracts shooting image beam pattern and obtains the coordinate of index point, obtains the vibration information of flexible structure.
The geometric center position of square aluminium sheet is arranged in the index point.
The utility model has the beneficial effects that
(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 carry out under various complicated and measurement accuracy is high.
(2) vibration monitoring can be carried out to the multiple whole audience of vibration ontology using high speed camera；The body of satellite antenna ontology
Product is larger and the high order mode vibration shape is complicated, economical, effectively can not be accurately measured to it using spot measurement instrument, and
Vibration monitoring can be carried out to all index points of spraying on the body using the binocular vision system of high speed camera composition, well
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 vibration excitors composition can motivate the vibration of the multi-modes of satellite antenna
It is dynamic, and vibrating is that multi-modes couple, 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.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the front view of the utility model.
Specific embodiment
Below with reference to examples and drawings, the utility model is described in further detail, but the reality of the utility model
It is without being limited thereto to apply mode.
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
By N row M arrange rigid plate 9 connect and compose, N, M be integer, the present embodiment by three rows, eight 24 pieces of same sizes of column rigidity
Plate passes through flexible guy rope 10 and is connected and fixed with 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 connection, flexible fixation pass through the fixation of flexible guy rope and adjacent rigid plate.Between every each item flexibility guy rope of a line away from
It respectively connects guy rope for the half of rigid board width from for 150mm and keeps axis consistent, to guarantee 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 aluminum profile and corner fittings, and is mounted on experimental bench by screw.
In the present embodiment, experimental bench is assembled by the aluminum profile that three kinds of length are respectively 3200mm, 1000mm, 500mm,
Table top is one piece of 3320mm × 1120mm × 8mm stainless steel plate, is connect by screw with profile, each junction of profile
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 positional relationships and camera such as the distance between camera shelf and experimental bench
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 middle 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 always in the field range of camera, ensure that the continuity of measurement, camera
Optical axis is vertical with the measuring surface of flexible structure, and camera front is enabled to shoot its surface.
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, so being not parallel placement model 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 method, when calibration, only needs a simple accurate calibration
Template, and stated accuracy is higher.
The present embodiment high speed camera selects in Wuhan the model Memrecam HX-3E for creating Lian Da Science and Technology Ltd.
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 vibration excitor, the computer 13
It is connect with high speed camera, the signal generator 15, power amplifier 14 and vibration excitor are sequentially connected.
Described two vibration excitors 11 are mounted on bracket 12 by screw, and the Position of Vibrating of vibration excitor is made to be located at flexible structure
Upper end, be connected by mandril with flexible fixation, the direction of excitation of mandril is horizontal direction.It is issued not by signal generator
It is transmitted to vibration excitor after power amplifier amplifies with corresponding signal is vibrated, flexible fixation is motivated by mandril, is made soft
Property structure generate vibration, the phase official post flexible structure for passing through the sinusoidal signal for changing vibration generates the vibration of various forms of modes
It is dynamic.
By issuing different accumulation signals to two vibration excitors, keep the sinusoidal signal phase of the vibration of vibration excitor different,
So that flexible structure ontology is generated different modal vibrations, such as swashs when vibration excitor receives the identical sinusoidal signal of mode of flexural vibration frequency
It encourages, vibration excitor presses the identical excitation of phase, then film deployed configuration is motivated to generate bending vibration；When two vibration excitors are received and turned round
When turning the identical sinusoidal signal excitation of modal frequency, two vibration excitors are motivated by identical signal and opposite in phase, then motivate production
The twisting vibration of raw film deployed configuration.
In the utility model, signal generator issues vibration signal, is sent to vibration excitor after power amplifier amplifies,
Vibration excitor motivates guy rope to connect the vibration that flexible structure generates different frequency by mandril；The binocular vision that two high speed cameras are constituted
Feel system synchronizes high frequency shooting to rigid plate, and acquisition image sequence is sent to computer.Computer extracts image spot and obtains
To the coordinate of index point, processing obtains the vibration information of flexible structure, carries out visualization processing, and index point is separately positioned on pros
An index point is arranged in the geometric center position of shape aluminium sheet, each square aluminium sheet center.
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.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by described
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (7)
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 column rigid plate is constituted, and adjacent rigid plate passes through flexible guy rope connection, 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 sliding block by holder, and sliding block moves on guide rail；
The vibrational excitation part includes computer, power amplifier, signal generator and vibration excitor, the computer and high speed
Camera connection, the signal generator, power amplifier and vibration excitor 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. vibration detection device according to claim 1-4, 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 vibration excitor is two, is located at soft
Property structure two sides upper end, by screw it is rack-mount, the bracket is fixed on experimental bench.
7. vibration detection device according to claim 3, which is characterized in that mark is arranged in the geometric center of square aluminium sheet
Point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821110362.6U CN208366458U (en) | 2018-07-12 | 2018-07-12 | A kind of vibration detection device of guy rope connection flexible structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821110362.6U CN208366458U (en) | 2018-07-12 | 2018-07-12 | A kind of vibration detection device of guy rope connection flexible structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709632A (en) * | 2018-07-12 | 2018-10-26 | 华南理工大学 | A kind of vibration detection device and method of guy rope connection flexible structure |
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2018
- 2018-07-12 CN CN201821110362.6U patent/CN208366458U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709632A (en) * | 2018-07-12 | 2018-10-26 | 华南理工大学 | A kind of vibration detection device and method of guy rope connection flexible structure |
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Granted publication date: 20190111 Termination date: 20210712 |
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| CF01 | Termination of patent right due to non-payment of annual fee |