CN107167235A - Cellular board vibration detection device and method are hinged based on digital picture related algorithm - Google Patents
Cellular board vibration detection device and method are hinged based on digital picture related algorithm Download PDFInfo
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- CN107167235A CN107167235A CN201710457569.4A CN201710457569A CN107167235A CN 107167235 A CN107167235 A CN 107167235A CN 201710457569 A CN201710457569 A CN 201710457569A CN 107167235 A CN107167235 A CN 107167235A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
Cellular board vibration detection device and method be hinged based on digital picture related algorithm the invention discloses a kind of, described device includes being hinged cellular board body, cultellation device, industrial camera, vibrator and computer, cellular board body part is hinged to be made up of three pieces of honeycomb sandwich boards, pass through hinge connection between plate between every two pieces of honeycomb sandwich boards, it is hinged cellular board body one end to be mechanically connected in metal support by clamping plate and steelframe, the other end is free end；Cultellation device provides the characteristic area of traceable monitoring as structure light source for binocular vision system, and industrial camera is extracted and gathered to the three-dimensional coordinate information of cellular board body.Vibration using the related method of digital picture to cellular board body is detected so that measuring system precision is high, it is small that measurand is disturbed, can realize measurement of full field, and device can also be used for simulating and studying the vibration characteristics of solar energy sailboard in addition.
Description
Technical field
The present invention relates to the positioning of flexible structure and vibration detection field, and in particular to one kind is calculated based on digital picture correlation
Method is hinged cellular board vibration detection device and method.
Background technology
Spacecraft enters after target track, solar energy sailboard expansion, and hinge is in the lock state between plate, now between two plates
Position relationship is fixed, and solar energy sailboard can approx be seen as thin rectangular slab, due to now solar energy sailboard structure chi
Very little big, rigidity is low, flexible height, and strong and lasting vibration can be produced when being acted on by external disturbance, and vibration may cause boat
The unstability of its device or satellite body, therefore the research of solar energy sailboard vibration characteristics is significant.
Carbon fiber, Al honeycomb sandwich panels are with its specific strength height, big, lightweight specific stiffness, heat-insulated antivibration, thermal coefficient of expansion
It the excellent properties such as can design, be used widely in terms of the hardened structure of spacecraft module, equipment supporter, sun wing scale.It is compound
Material honeycomb sandwich structure is combined by three kinds of stocks, including upper and lower panel, sandwich layer and bonding sandwich layer and panel it
Between adhesive, upper and lower surface is made up of that there is provided bending stiffness, plane tension and compression and shearing rigidity thin panel；Intermediary cellular core compared with
Thickness, density is low, and it separates upper and lower panel, and bang path is provided for transverse shearing stress stream；Adhesive linkage connects honeycomb core and face
Plate, is easy to load transmission.
In large-size pliable structure vibration measurement and the research of active control, shaking for binocular vision system measurement structure is utilized
It is dynamic to have its unique advantage.Binocular vision photogrammetry is a kind of non-contact measurement, and it does not change the vibration characteristics of structure, therefore obtains
The measurement result arrived is more accurate.Digital Image Correlation Method is the hot spot according to body surface random distribution before and after vibration
Statistic correlation determines the vibration information of object, this method have in real time, noncontact, high accuracy, panorama type measurement, to tested
The advantages of object interference is small.Traditional two-dimensional digital image correlation technique can only measure two-dimension displacement and strain, and based on binocular
Principle of stereoscopic vision and Digital Image Correlation Method can realize the three-D displacement measurement to object.
The content of the invention
The purpose of the present invention is to be based on digital picture related algorithm there is provided one kind with deficiency in view of the shortcomings of the prior art
Be hinged cellular board vibration detection device, to realize noncontact, accurate measurement in real time to being hinged the vibration of cellular board body.
Another object of the present invention is to provide a kind of based on digital picture related algorithm to be hinged cellular board vibration detection
Method.
The purpose of the present invention can be achieved through the following technical solutions：
It is a kind of that cellular board vibration detection device is hinged based on digital picture related algorithm, including it is hinged cellular board body
Point, projection measurement part, vibrational excitation part and computer, the cellular board body part that is hinged includes three block of material, size
Identical honeycomb sandwich board, respectively the first honeycomb sandwich board, the second honeycomb sandwich board and the 3rd honeycomb sandwich board, every two pieces of honeybees
Between sandwich panels by hinge connection between two plates of position symmetrical above and below together, be hinged cellular board body the of composition
One honeycomb sandwich board end is mechanically connected in metal support by clamping plate and steelframe, and metal support is vertically fixed on horizontal positioned
Test on pedestal, the other end for being hinged cellular board body is free end, and be hinged the horizontal plane of cellular board body and experiment pedestal
Vertically；The projection measurement part includes cultellation device and two industrial cameras, and cultellation device and two industrial cameras are all fixed on pin
On frame, the minute surface of cultellation device is just to being hinged cellular board body surface, and two industrial cameras are separately mounted to the both sides of cultellation device, protects
Demonstrate,prove its field range and fully include the second honeycomb sandwich board and the 3rd honeycomb sandwich board；The vibrational excitation part includes three together
The vibrator of model and matching used high-voltage amplifier, three vibrators are evenly distributed on the first honeycomb sandwich board close to metal
On the width of bearing, the position of two vibrators is symmetrical on width center line up and down, the vibrator position in centre position
In on width center line.
Further, the honeycomb sandwich board is made up of honeycomb core, tack coat and panel, tack coat two-layer panel by above and below
With honeycomb core is cementing turns into the rigid structure of an entirety.
Further, hinge is made up of male hinge, female hinge, wind spring, bearing pin, locking swing rod and eccentric screw between the plate, when
When hinge deploys between plate, male hinge and female hinge are relatively rotated in the presence of driving element wind spring around bearing pin, are locked in rotation process
The first expansion slideway along in public affairs hinge of pin on fixed pendulum bar is slided, a left side for the locking slot cut with scissors in the latter stage of expansion process along public affairs
Break away into and be finally stuck in locking trench bottom；In the locked state, the position relationship between honeycomb sandwich board is fixed, and is hinged cellular board
Body is sufficiently spread out, being hinged cellular board body and can be regarded as one block of Integral rectangular plate under this state.
Further, it is described based on digital picture related algorithm be hinged cellular board vibration detection device can be used for simulate
And study the vibration characteristics of its body after solar energy sailboard expansion.
Another object of the present invention can be achieved through the following technical solutions：
A kind of to be hinged cellular board method for detecting vibration based on digital picture related algorithm, methods described includes following step
Suddenly：
Step 1: the vibrational excitation signal that computer is sent is transmitted to high-voltage amplifier after being changed through A/D, signal is through high pressure
Three vibrators are transferred to after amplifier amplification, it is curved that vibrator is hinged cellular board body according to the excitation of the different combinations of signal
Bent or twisting vibration；
Step 2: opening cultellation device, hot spot is uniformly projected to the second honeycomb sandwich board and the 3rd cellular sandwich plate surface,
The hot spot with continuous characteristic area is formed, using the two CCD camera measure system of two industrial camera compositions to being hinged honeycomb
Panel vibration body gathers continuous image, is divided on image and chooses characteristic sub-areas interested, the corresponding numeral of operation
Image correlation algorithm, obtains the three-dimensional coordinate information of area-of-interest, so as to obtain being hinged the vibration letter of cellular board body indirectly
Breath；
Step 3: form, frequency, magnitude parameters by changing pumping signal, repetition test, obtain many experiments knot
Really, obtain being hinged the vibration characteristics of cellular board body.
Further, in step one, by the pumping signal to three vibrators transmission same frequencys, same-phase, it can swash
The excited flexural vibrations for being hinged cellular board body；Pass through vibrator transmission same frequency, the signal of antiphase to upper and lower ends, energy
Enough the twisting vibration for being hinged cellular board body is encouraged.
Further, in step 2, divided on the consecutive image of collection and choose characteristic sub-areas interested, with this
As the reference position of vibration detection, by matching the image for including the subregion before and after vibration, position vibration is analyzed front and rear
Statistic correlation determining, the vibration displacement information for being hinged honeycomb panel vibration body is extracted, by changing area-of-interest
Quantity and its can simultaneously be collected in the position being hinged on honeycomb panel vibration body, detection process and be hinged cellular board sheet
The vibration information of body different parts, can be used for measuring the multi-modes coupled vibrations for being hinged cellular board with this, realize vibration
Decoupling.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, on the one hand the present invention can be realized to being hinged honeybee using the mode of cultellation device projection index point combining camera detection
The complete heed contacted measure of nest panel vibration, measurement result has higher accuracy；On the other hand compared in vibration body
Surface applies spot, and the mode of projected spot is efficient, easy, and the light spot shape cast out is regular, inhibition is good, can
The operation of fully simplified follow-up graphical analysis and processing, good base is provided for the related method for detecting vibration of digital picture
Plinth.
2nd, being hinged cellular board vibration detection device and can be used for studying hinge based on digital picture related algorithm of the invention
Between influence of the nonlinear characteristic of chain junction to vibrational system, plate due to there is the non-thread such as friction in the parts junction of hinge
Sexual factor, can be to being hinged the shuttle belt of cellular board to influence, and second piece of detection is hinged cellular board and the 3rd piece simultaneously in the present apparatus
The Vibration Condition of cellular board is hinged, the data collected can be used for studying the dynamics of hinge in itself.Present apparatus mould
The vibration of the solar energy sailboard at hinge under the influence of nonlinear characteristic is intended, has been provided well to further investigate its vibration characteristics
Basis.
3rd, vibration detection device of the present invention is using being hinged cellular board and axial pin type hinge arrangement come analog solar sail
Hardened structure, can more realistically reduce its Vibration Condition in space, and obtained vibration characteristics is analyzed also to space flight by measuring
Design, the manufacture of device solar energy sailboard structure have directive function.
4th, when the present invention carries out vibration detection, image procossing and analysis to experimental subjects using the related method of digital picture
Vibration information is extracted according to the statistical property of area-of-interest, information extraction is carried out to single index point compared to traditional,
This process employs more image informations so that the vibration signal that measurement is obtained is more accurate.
Brief description of the drawings
Fig. 1 is that the embodiment of the present invention 1 is hinged cellular board vibration detection device totally knot based on digital picture related algorithm
Structure schematic diagram.
Fig. 2 is the structural representation of hinge between the plate of the embodiment of the present invention 1.
Fig. 3 is the structural representation of the honeycomb sandwich board of the embodiment of the present invention 1.
Fig. 4 is the hot spot schematic diagram that the incident point of the embodiment of the present invention 2 is formed.
Fig. 5 is that the principle comprising sub-district area image is shown before and after the digital picture related algorithm of the embodiment of the present invention 2 matches vibration
It is intended to.
Wherein, 1- foot stools, 2- industrial cameras, 3- cultellation devices, (4-1- honeycomb cores, 4-2- is bonded the honeycomb sandwich boards of 4- the 3rd
Layer, 4-3- panels), hinge (5-1- public affairs hinges, 5-2- wind springs, 5-3- slideways, 5-4- mother's hinges, 5-5- eccentric screws, 5-6- between 5- plates
Bearing pin, 5-7- locking swing rods, 5-8- pins), the honeycomb sandwich boards of 6- second, the honeycomb sandwich boards of 7- first, 8- vibrators, 9- steel
Frame, 10- metal supports, 11- experiment pedestals, 12- high-voltage amplifiers, 13- computers.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Embodiment 1：
A kind of cellular board vibration detection is hinged based on digital picture related algorithm as shown in figure 1, present embodiments providing
Device, including cellular board body part, projection measurement part, vibrational excitation part and computer (13) are hinged, it is described to be hinged honeybee
Nest plate body part includes three block of material, size identical honeycomb sandwich board, respectively the first honeycomb sandwich board (7), the second honeybee
By between two plates of position symmetrical above and below between sandwich panels (6) and the 3rd honeycomb sandwich board (4), every two pieces of honeycomb sandwich boards
Hinge (5) links together, and the first honeycomb sandwich board end for being hinged cellular board body of composition passes through clamping plate and steelframe (9) machinery
It is connected in metal support (10), metal support (10) is vertically fixed on the experiment pedestal (11) of horizontal positioned, is hinged honeycomb
The other end of plate body is free end, and is hinged the horizontal plane of cellular board body and experiment pedestal (11)；The projection is surveyed
Amount part includes cultellation device (3) and two industrial cameras (2), and cultellation device (3) and two industrial cameras (2) are all fixed on foot stool
(1) on, the minute surface of cultellation device (3) is just to being hinged cellular board body surface, and two industrial cameras (2) are separately mounted to cultellation device
(3) both sides, it is ensured that its field range fully includes the second honeycomb sandwich board (6) and the 3rd honeycomb sandwich board (4)；The vibration
Driver unit includes the vibrator (8) and matching used high-voltage amplifier (12) of three same models, and three vibrators (8) are uniform
The first honeycomb sandwich board (7) is distributed on the width of metal support (10), the position of two vibrators (8) is closed up and down
Symmetrical in width center line, the vibrator (8) in centre position is located on width center line.
The structure chart of the honeycomb sandwich board is as shown in figure 3, by honeycomb core (4-1), tack coat (4-2) and panel (4-3)
Composition, tack coat (4-2) will up and down two-layer panel (4-3) with honeycomb core (4-1) is cementing turns into the rigid structure of an entirety.Institute
The structure chart of hinge (5) between plate is stated as shown in Fig. 2 by male hinge (5-1), female hinge (5-4), wind spring (5-2), bearing pin (5-6), locking
Swing rod (5-7) and eccentric screw (5-5) composition, when hinge (5) deploys between plate, male hinge (5-1) and female hinge (5-4) are in driving member
Relatively rotated in the presence of part wind spring (5-2) around bearing pin (5-6), the pin (5-8) on swing rod (5-7) is locked in rotation process
The first expansion slideway (5-3) along in public affairs hinge (5-1) is slided, and the locking slot on (5-1) is cut with scissors along public affairs in the latter stage of expansion process
Left side is slipped into and is finally stuck in locking trench bottom；In the locked state, the position relationship between honeycomb sandwich board is fixed, and is hinged honeycomb
Plate body is sufficiently spread out, being hinged cellular board body and can be regarded as one block of Integral rectangular plate under this state.
It is described based on digital picture related algorithm be hinged cellular board vibration detection device can be used for simulate and study too
The vibration characteristics of its body after positive energy outspreading sailboard.
The size of the three blocks of cellular board sandwich plates used in the present embodiment is 500mm × 500mm × 16.3mm, wherein honeybee
The shape of each cell element of nest core is the regular hexagon of rule, length of side 6mm, wall thickness 0.07mm, high 15mm, and material trademark is
A3003-H19, plate thickness is 0.5mm, using epoxide resin material.The modulus of elasticity of epoxy resin is Ep=34.64Gpa,
Density is ρ=1840kg/m3.Industrial camera (1) is from the model acA1600-60gc's of Basler companies of Germany production
GIGE cameras, using CMOS sensitive chips, highest frame per second 60fps, resolution ratio is 1600 × 1200；From the mirror of company of Ricoh
Head, its model FL-HC0614-2M, focal length is 6mm, and size is Φ 32mm × 35.7mm.Cultellation device (3) selects Geodetic
The model PRO-SPOT/A of System companies production cultellation device, single can project 600-2300 point, and precision is up to 10 μm.
Under the vibrator for the model APA1000XL that vibrator (8) is produced from CedratTechnologies companies, no-load conditions
Its maximum displacement that can be produced is 1297um, and exciting force is 471.21N to the maximum, and precision is up to 10.99nm；High-voltage amplifier
(12) two-path amplifier of the model 2350 produced from Tegam companies, peak value maximum 400Vp-p.
Embodiment 2：
Present embodiments provide and a kind of cellular board method for detecting vibration, the side are hinged based on digital picture related algorithm
Method comprises the following steps：
Step 1: the vibrational excitation signal that computer (13) is sent is transmitted after being changed through A/D to high-voltage amplifier (12), letter
Three vibrators (8) are transferred to after number amplifying through high-voltage amplifier (12), and vibrator (8) swashs according to the different combinations of signal
Encourage and be hinged the bending of cellular board body or twisting vibration；
In this step, by the pumping signal to three vibrators (8) transmission same frequencys, same-phase, hinge can have been encouraged
Connect the flexural vibrations of cellular board body；, can by vibrator (8) transmission same frequency, the signal of antiphase to upper and lower ends
The twisting vibration for being hinged cellular board body is encouraged.
Step 2: opening cultellation device (3), hot spot is uniformly projected to the second honeycomb sandwich board (6) and the 3rd cellular sandwich
Plate (4) surface, the hot spot schematic diagram that incident point is formed is as shown in figure 4, the formation hot spot with continuous characteristic area, is utilized
The two CCD camera measure system of two industrial camera (2) compositions gathers continuous image to being hinged honeycomb panel vibration body, in figure
Divide as upper and choose characteristic sub-areas interested, run corresponding digital picture related algorithm, obtain area-of-interest
Three-dimensional coordinate information, so as to obtain being hinged the vibration information of cellular board body indirectly；
In this step, divided on the consecutive image of collection and choose characteristic sub-areas interested, in this, as vibration
The reference position of detection, by matching the image for including the subregion before and after vibration, analyzes the statistics phase before and after the vibration of the position
Closing property determining, extract the vibration displacement information for being hinged honeycomb panel vibration body, by change area-of-interest quantity and
It can be collected simultaneously in the position being hinged on honeycomb panel vibration body, detection process is hinged cellular board body difference portion
The vibration information of position, can be used for measuring the multi-modes coupled vibrations for being hinged cellular board with this, realize the decoupling of vibration.
Wherein, digital picture related algorithm matching vibration before and after comprising sub-district area image principle schematic as shown in figure 5,
Wherein piece image is expressed as f (x, y) as reference picture, and another width is expressed as g (x, y) as image to be matched, two dimension
Digital correlation method matches two images by related operation, obtains displacement field.One is selected in reference picture f (x, y) with M
(x0,y0) centered on (2n+1) × (2n+1) sub-district, using the half-tone information in sub-district, pass through certain relevant matches and calculate
Method, the region to be matched in image g (x, y) to be matched carries out progressive scan operation, finds with M ' (x0′,y0') centered on
Target image sub-district, image subsection voluntarily can be divided and selected according to the vibration information to be extracted.
Two-dimensional digital correlation technique is combined by 3-dimensional digital correlation technique with binocular stereo vision measurement, in 3-dimensional digital
Matching includes two links in the measurement process of correlation technique：Two dimension matching and Stereo matching.Two dimension matching refers to same camera and adopted
The matching of image before and after the object vibration of collection, Stereo matching refers to the matching of synchronization left images, wherein Stereo matching process
Also can be using the matching process shown in Fig. 5.
The similarity criterion used in the present embodiment is for normalized crosscorrelation (NCC), calculation formula：
The scope that the algorithm calculates the NCC (x, y) of obtained correlation matrix is [- 1,1], and coefficient is 1 position table
Show complete matching, -1 represents bad matching, and 0 represents non-correlation.In view of the influence of the factors such as interference noise, best match
The coefficient correlation of position generally takes 0.8.
Step 3: form, frequency, magnitude parameters by changing pumping signal, repetition test, obtain many experiments knot
Really, obtain being hinged the vibration characteristics of cellular board body.
It is described above, it is only patent preferred embodiment of the present invention, but the protection domain of patent of the present invention is not limited to
This, any one skilled in the art is in the scope disclosed in patent of the present invention, according to the skill of patent of the present invention
Art scheme and its patent of invention design are subject to equivalent substitution or change, belong to the protection domain of patent of the present invention.
Claims (7)
1. a kind of be hinged cellular board vibration detection device based on digital picture related algorithm, it is characterised in that：Including being hinged honeybee
Nest plate body part, projection measurement part, vibrational excitation part and computer, the cellular board body part that is hinged is including three pieces
Material, size identical honeycomb sandwich board, respectively the first honeycomb sandwich board, the second honeycomb sandwich board and the 3rd cellular sandwich
Between plate, every two pieces of honeycomb sandwich boards by hinge connection between two plates of position symmetrical above and below together, composition is hinged honeybee
First honeycomb sandwich board end of nest plate body is mechanically connected in metal support by clamping plate and steelframe, and metal support is vertically fixed
On the experiment pedestal of horizontal positioned, the other end for being hinged cellular board body is free end, and is hinged cellular board body and experiment
The horizontal plane of pedestal；The projection measurement part includes cultellation device and two industrial cameras, cultellation device and two industrial phases
Machine is all fixed on foot stool, and the minute surface of cultellation device is just to being hinged cellular board body surface, and two industrial cameras are separately mounted to throw
The both sides of point device, it is ensured that its field range fully includes the second honeycomb sandwich board and the 3rd honeycomb sandwich board；The vibrational excitation
Part includes the vibrator and matching used high-voltage amplifier of three same models, and three vibrators are evenly distributed on the first honeycomb
Battenboard is on the width of metal support, and the position of two vibrators is symmetrical on width center line up and down, middle
The vibrator of position is located on width center line.
2. it is according to claim 1 it is a kind of cellular board vibration detection device is hinged based on digital picture related algorithm, its
It is characterised by：The honeycomb sandwich board is made up of honeycomb core, tack coat and panel, tack coat two-layer panel and honeycomb core by above and below
It is cementing to turn into the rigid structure of an entirety.
3. it is according to claim 1 it is a kind of cellular board vibration detection device is hinged based on digital picture related algorithm, its
It is characterised by：Hinge is made up of male hinge, female hinge, wind spring, bearing pin, locking swing rod and eccentric screw between the plate, when hinge between plate
During expansion, male hinge and female hinge are relatively rotated in the presence of driving element wind spring around bearing pin, are locked in rotation process on swing rod
Pin first slided along the expansion slideway in public hinge, slipped into simultaneously along on the left of the locking slot in public hinge in the latter stage of expansion process
Finally it is stuck in locking trench bottom；In the locked state, the position relationship between honeycomb sandwich board is fixed, and is hinged cellular board body abundant
Expansion, being hinged cellular board body and can be regarded as one block of Integral rectangular plate under this state.
4. it is according to claim 1 it is a kind of cellular board vibration detection device is hinged based on digital picture related algorithm, its
It is characterised by：It is described based on digital picture related algorithm be hinged cellular board vibration detection device can be used for simulate and study too
The vibration characteristics of its body after positive energy outspreading sailboard.
5. a kind of be hinged cellular board method for detecting vibration based on digital picture related algorithm, it is characterised in that methods described bag
Include following steps：
Step 1: the vibrational excitation signal that computer is sent is transmitted to high-voltage amplifier after being changed through A/D, signal is through high voltage amplifier
Be transferred to three vibrators after device amplification, vibrator according to the excitation of the different combinations of signal be hinged the bending of cellular board body or
Twisting vibration；
Step 2: opening cultellation device, hot spot is uniformly projected to the second honeycomb sandwich board and the 3rd cellular sandwich plate surface, formed
Hot spot with continuous characteristic area, is shaken using the two CCD camera measure system of two industrial camera compositions to being hinged cellular board
Dynamic body gathers continuous image, is divided on image and chooses characteristic sub-areas interested, runs corresponding digital picture
Related algorithm, obtains the three-dimensional coordinate information of area-of-interest, so as to obtain being hinged the vibration information of cellular board body indirectly；
Step 3: form, frequency, magnitude parameters by changing pumping signal, repetition test, obtain many experiments result, obtain
To the vibration characteristics for being hinged cellular board body.
6. it is according to claim 5 it is a kind of cellular board method for detecting vibration is hinged based on digital picture related algorithm, its
It is characterised by：In step one, by the pumping signal to three vibrators transmission same frequencys, same-phase, it can encourage and be hinged
The flexural vibrations of cellular board body；By vibrator transmission same frequency, the signal of antiphase to upper and lower ends, it can encourage
It is hinged the twisting vibration of cellular board body.
7. it is according to claim 5 it is a kind of cellular board method for detecting vibration is hinged based on digital picture related algorithm, its
It is characterised by：In step 2, divided on the consecutive image of collection and choose characteristic sub-areas interested, in this, as vibration
The reference position of detection, by matching the image for including the subregion before and after vibration, analyzes the statistics phase before and after the vibration of the position
Closing property determining, extract the vibration displacement information for being hinged honeycomb panel vibration body, by change area-of-interest quantity and
It can be collected simultaneously in the position being hinged on honeycomb panel vibration body, detection process is hinged cellular board body difference portion
The vibration information of position, can be used for measuring the multi-modes coupled vibrations for being hinged cellular board with this, realize the decoupling of vibration.
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| CN108692900A (en) * | 2018-07-12 | 2018-10-23 | 华南理工大学 | More flexible hinged plate whirling vibration detection devices and method |
| CN108760025A (en) * | 2018-07-12 | 2018-11-06 | 华南理工大学 | More flexible board vibration detection devices and method |
| CN109060284A (en) * | 2018-08-07 | 2018-12-21 | 广东工业大学 | A kind of Experimental modal analysis method based on DIC technology |
| CN109067362A (en) * | 2018-09-03 | 2018-12-21 | 上海空间电源研究所 | The hot integrated environment simulator of the in-orbit electromechanics of flexible solar cell circuit and method |
| CN109115877A (en) * | 2018-08-07 | 2019-01-01 | 广东工业大学 | A kind of camber mode damnification recognition method based on DIC technology |
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| CN108692900A (en) * | 2018-07-12 | 2018-10-23 | 华南理工大学 | More flexible hinged plate whirling vibration detection devices and method |
| CN108760025A (en) * | 2018-07-12 | 2018-11-06 | 华南理工大学 | More flexible board vibration detection devices and method |
| CN108692900B (en) * | 2018-07-12 | 2023-06-20 | 华南理工大学 | Device and method for detecting rotation vibration of multiple flexible hinge plates |
| CN108760025B (en) * | 2018-07-12 | 2023-08-18 | 华南理工大学 | Vibration detection device and method for multiple flexible boards |
| CN109060284A (en) * | 2018-08-07 | 2018-12-21 | 广东工业大学 | A kind of Experimental modal analysis method based on DIC technology |
| CN109115877A (en) * | 2018-08-07 | 2019-01-01 | 广东工业大学 | A kind of camber mode damnification recognition method based on DIC technology |
| CN109067362A (en) * | 2018-09-03 | 2018-12-21 | 上海空间电源研究所 | The hot integrated environment simulator of the in-orbit electromechanics of flexible solar cell circuit and method |
| CN109067362B (en) * | 2018-09-03 | 2020-01-31 | 上海空间电源研究所 | Flexible solar cell circuit on-track machine electric heating comprehensive environment simulation device and method |
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