CN208860308U - A digital speckle deformation detection device for an elliptical cylindrical shell - Google Patents
A digital speckle deformation detection device for an elliptical cylindrical shell Download PDFInfo
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- CN208860308U CN208860308U CN201821612753.8U CN201821612753U CN208860308U CN 208860308 U CN208860308 U CN 208860308U CN 201821612753 U CN201821612753 U CN 201821612753U CN 208860308 U CN208860308 U CN 208860308U
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- elliptical cylinder
- digital speckle
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- shell
- shape shell
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Abstract
The utility model discloses a kind of digital speckle deformation detecting devices of elliptical cylinder-shape shell, including elliptical cylinder-shape housing parts, driver unit and detection part；The elliptical cylinder-shape housing parts include elliptical cylinder-shape shell and end cap, the driver unit includes vibration excitor, signal generator and power amplifier, and the detection part includes 3-dimensional digital speckle, laser displacement sensor, charge amplifier, A/D capture card, vision detection system, computer and accelerometer.
Description
Technical field
The utility model relates to vibration detection fields, and in particular to a kind of digital speckle shape changing detection of elliptical cylinder-shape shell
Device.
Background technique
Cylindrical shell structure has been widely used in many engineering fields, such as mechanical, civilian, ship field.With section
The development of technology, whole to be obviously improved to the consciousness of mechanical oscillatory structure, as a result, more and more scholars put forth effort on research
The dynamic response of shell.Compared to ring-shaped cylinder shell, elliptical cylinder-shape shell closed at both ends is arranged in bearing capacity and equipment etc.
Advantage is had more in engineer application.This is because Curvature varying of the elliptical cylinder-shape shell on cross section has diversity, ovality
Bigger elliptical cylinder-shape shell, to the sensitivity of error with regard to smaller, and their ultimate load is likely to be greater than buckling
Load.Elliptical cylinder-shape shell closed at both ends is frequently applied in such as pressure vessel, acoustic transducer, oil storage tank, underwater boat as a result,
Row device etc..Therefore, the static and dynamic c haracteristics for studying elliptical cylinder-shape shell closed at both ends have great importance.Currently,
In mainstream to elliptical cylinder-shape shell carry out shape changing detection mode research in, detection mode generally use piezoelectric transducer or
Accelerometer, this detection mode install it is more convenient, will certainly in detection process but as contact type measurement mode
There are load effects, to be artificially induced experimental error, are unfavorable for the raising of experimental precision.
Utility model content
In order to overcome shortcoming and deficiency of the existing technology, the number that the utility model provides a kind of oval-shaped shell dissipates
Spot deformation detecting device.
The utility model forms 3-dimensional digital speckle in elliptical cylinder-shape shell surface lacquer, and then vibration excitor motivates elliptical cylinder-shape
The three-dimensional whole field dynamic deformation detection system of shell, a pair of of high speed camera composition acquires 3-dimensional digital speckle on circular cylindrical shell surface
For the synchronous detection simultaneously of deformation data, laser displacement sensor and accelerometer to compare, the vibration information of acquisition is transferred to meter
Calculation machine, computer go out the deformed state of elliptical cylinder-shape shell by respective handling post analysis.
The utility model adopts the following technical solution:
A kind of digital speckle deformation detecting device of elliptical cylinder-shape shell, including elliptical cylinder-shape housing parts, driver unit
And detection part；
The elliptical cylinder-shape housing parts include elliptical cylinder-shape shell and end cap, and the end cap includes upper end cover and lower end
Lid, elliptical cylinder-shape shell are placed on experimental bench vertically, and upper and lower end caps pass through the upper end of spiral marking connection occluded ellipse cylindrical shell
And lower end；
The driver unit includes vibration excitor, signal generator and power amplifier, and the vibration excitor is arranged in vibration excitor
On pedestal, the appearance face contact of vibration excitor mandril and elliptical cylinder-shape shell, signal generator generates signal input power amplifier,
Power amplifier driving vibration excitor evokes the deformation of elliptical cylinder-shape shell；
The detection part includes 3-dimensional digital speckle, laser displacement sensor, charge amplifier, A/D capture card, vision
Detection system, computer and accelerometer, 3-dimensional digital speckle to be formed by painting in elliptical cylinder-shape housing outer surface, three dimensions
Word speckle vision detection system within sweep of the eye, the outer surface of elliptical cylinder-shape shell, vision-based detection is arranged in accelerometer
System is connect with computer, and accelerometer and laser displacement sensor detect the vibration signal of elliptical cylinder-shape shell by charge
Amplifier and A/D capture card are transferred to computer.
The vision detection system includes a pair of of high speed camera, camera head and camera sliding rail, the pair of high speed camera
It is mounted on camera head, the camera head is mounted on camera sliding rail.
It is front with the face that 3-dimensional digital speckle is covered, the accelerometer is specially three, is respectively distributed in ellipse
Left side, right side and the rear side of housing outer surface, and it is distributed in the middle section of elliptical cylinder-shape shell.
The vibration excitor is two, is symmetricly set on the two sides of elliptical cylinder-shape shell.
The laser displacement sensor is two, is symmetricly set on elliptical cylinder-shape housing outer surface, launching position is located at
The middle position of shell vertical direction.
The area coverage of the 3-dimensional digital speckle accounts for the one third of elliptical cylinder-shape housing outer surface.
A kind of method of the digital speckle deformation detecting device of elliptical cylinder-shape shell, includes the following steps:
3-dimensional digital speckle is randomly formed in the spray painting of elliptical cylinder-shape housing outer surface；
Signal generator generates signal input power amplifier, and vibration excitor is further driven to evoke the vibration of elliptical cylinder-shape shell
It is dynamic, generate deformation；
High speed camera acquires the deformation data of elliptical cylinder-shape surface of shell 3-dimensional digital speckle, inputs computer；Laser position
Displacement sensor and accelerometer detect vibration signal simultaneously, which is calculated by charge amplifier, the input of A/D capture card
Machine, computer obtain the deformed state of elliptical cylinder-shape shell by analysis.
The utility model has the beneficial effects that
(1) the utility model places vibration excitors at different locations using two and carries out excitings, can carry out separate unit excitation,
Two are motivated simultaneously, enrich the deformation mode on elliptical cylinder-shape shell surface；Efficient, the distortionless feature of vibration excitor is conducive to improve
The feasibility of experimental provision；
(2) the utility model uses three-dimensional whole field dynamic deformation detection system as the vibration detecting part of the utility model
Point, its advantage is that: do not have to directly contact testee, so the dynamic property of testee is not influenced；3-dimensional digital speckle system
Facilitate, be sprayed on behind elliptical cylinder-shape shell surface be equivalent to tens of thousands of differ in size, the identification point that position is random, use three-dimensional whole field
Dynamic deformation detection system detects several speckle identification points simultaneously, can effectively improve experimental precision.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the main view of Fig. 1；
Fig. 3 is the left view of Fig. 1；
Fig. 4 is the top view of Fig. 1.
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 4, a kind of digital speckle deformation detecting device of elliptical cylinder-shape shell, including elliptical cylinder-shape shell
Partially, driver unit and detection part；
The elliptical cylinder-shape housing parts include elliptical cylinder-shape shell 4 and end cap 3, and the end cap includes upper end cover and lower end
Lid, elliptical cylinder-shape shell are placed on vertically on experimental bench 8, and upper and lower end caps are upper by spiral marking connection occluded ellipse cylindrical shell
End and lower end.The experimental bench is that aluminum profile seat plays a supportive role for placing elliptical cylinder-shape shell and driver unit.
The driver unit includes vibration excitor 5, signal generator 1 and power amplifier 2, and the vibration excitor is arranged in exciting
On device pedestal 6, the vibration excitor pedestal is arranged on experimental bench, the appearance face contact of vibration excitor mandril and elliptical cylinder-shape shell,
Position of Vibrating is selected in the middle section of the outer surface of elliptical cylinder-shape shell, and signal generator generates signal input power amplifier,
Power amplifier driving vibration excitor evokes the deformation of elliptical cylinder-shape shell.Using two place vibration excitor at different locations into
Row exciting can carry out separate unit excitation, two while motivate, and enrich the deformation mode on elliptical cylinder-shape shell surface；Vibration excitor it is efficient,
Distortionless feature is conducive to improve the feasibility of experimental provision.
The detection part includes 3-dimensional digital speckle 7, laser displacement sensor 14, computer 18, vision detection system
And accelerometer 13.
The 3-dimensional digital speckle 7 be equivalent to it is tens of thousands of differ in size, the identification point that position is random, particular by shell
Body surface lacquer forms random 3-dimensional digital speckle, and area coverage accounts for the one third of elliptical cylinder-shape housing outer surface.With it
The position of covering is front.
The laser displacement sensor is two, is symmetrically disposed on experimental bench by sensor pedestal 15, the laser
The launching position of displacement sensor is arranged in behind elliptical cylinder-shape shell, and is located at middle section, and laser beam is perpendicular to projection
Tangent plane where point.
The accelerometer is three, is respectively distributed in the left side, the right side and back of elliptical cylinder-shape shell.
Vision detection system a pair of high speed camera 9, camera head 12, camera sliding rail 10；The high speed camera 9 is installed
On camera head 12；The camera head 12 is that fluid pressure type adjusts holder, heavier camera can be carried, by adjusting camera cloud
The adjusting knob of platform 12 can be finely adjusted the shooting angle of high speed camera 9；The camera head 12 is mounted on camera sliding rail 10
On, moving back and forth camera head 12 on the slide rail can be changed the camera site of camera；The three-dimensional whole field dynamic deformation detection
System is placed on phase machine worktable 11, and phase machine worktable 11 has certain distance away from experimental bench 8, guarantees that elliptical cylinder-shape shell is in height
In the field range of fast camera.
When work, three-dimensional whole field dynamic deformation detection system acquires the deformation of 3-dimensional digital speckle on elliptical cylinder-shape shell surface
Information, the vibration information of acquisition are transferred to computer, and computer goes out the deformation shape of elliptical cylinder-shape shell by respective handling post analysis
State；Laser displacement sensor and accelerometer synchronous detection simultaneously, the signal detected is by the amplification of charge amplifier 16, A/D
Capture card 17 is transferred to computer after acquiring to compare.3-dimensional digital is randomly formed in the spray painting of elliptical cylinder-shape housing outer surface to dissipate
Spot；
The detection process of the utility model are as follows:
Signal generator generates signal input power amplifier, and vibration excitor is further driven to evoke the vibration of elliptical cylinder-shape shell
It is dynamic, generate deformation；
High speed camera acquires the deformation data of elliptical cylinder-shape surface of shell 3-dimensional digital speckle, inputs computer；Laser position
Displacement sensor and accelerometer detect vibration signal simultaneously, which is calculated by charge amplifier, the input of A/D capture card
Machine, computer obtain the deformed state of elliptical cylinder-shape shell by analysis.
In the present embodiment, the major semiaxis of measurand elliptical cylinder-shape shell is 700mm, semi-minor axis 600mm, a height of
1200mm, with a thickness of 0.5mm, material selection aluminium alloy, density of material 2770kg/m3, Poisson's ratio 0.31, elasticity modulus is
193GPa。
Vibration excitor 5 selects the HEV series vibration excitor of Nanjing Fo Neng Scientific and Technical Industry Co., Ltd production, the series excitation element
Product is small, light-weight.The vibration excitor of model HEV-50 is selected, maximum exciting force is 50N, and bandwidth range is 0~3000Hz, most
Large amplitude ± 5mm has many advantages, such as that efficient, energy conservation and the distortion factor are small.
A/D capture card 17 selects ISLA222S12 type speedy carding process ADC, and resolution ratio is 12, maximum conversion ratio position
125MSPS, temperature range are -40 DEG C~85 DEG C.
The high-speed camera that high speed camera 11 selects Japanese NAC image technique Co., Ltd to produce, model HX-7S, HX-
7S high-speed camera is compact light and handy, and up to 2000fps when high definition resolution ratio, electronic shutter is differentiated up to 10 milliseconds to 1.1 microseconds
Rate is 2560x1920 pixel, has high-resolution, high sensitivity, independent and ultrafast imaging technique；Camera head 12 is selected
The fluid head of Fei Mansi company production, is used to verify the levelness of platform equipped with level meter thereon；Sliding rail selects Fei Mansi public
The model Famous F8 PRO photography sliding rail of department's production, sliding rail material is carbon fiber, and light-weight, tensile strength is high, mobile flat
Slip-stream is smooth.High speed camera is mounted on camera head, and the adjusting knob by adjusting camera head can be to the shooting angle of high speed camera
Degree is finely adjusted；Camera head is mounted on camera sliding rail, and moving back and forth camera head on the slide rail can be changed the shooting of camera
Position.
Laser displacement sensor selects the LJ-G5000 series high-precision 2D laser displacement sensor of Keyemce company production,
Its precision is up to+- 0.1%F.S., and sampling rate is up to 3.8ms；
Accelerometer selects the universal accelerometer of the model 8704-B500 of Kistler company production, sensitivity
It is ± 5%, frequency response range is 1~10000Hz.
Computer selects the IPC610 cabinet of Taiwan Advantech company production, PCA-6006 mainboard, Pentium IV
2.4G Intel CPU。
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 (6)
1. a kind of digital speckle deformation detecting device of elliptical cylinder-shape shell, which is characterized in that including elliptical cylinder-shape housing parts,
Driver unit and detection part；
The elliptical cylinder-shape housing parts include elliptical cylinder-shape shell and end cap, and the end cap includes upper end cover and lower cover, ellipse
Cylindrical housings are placed on experimental bench vertically, upper and lower end caps by the upper end of spiral marking connection occluded ellipse cylindrical shell and under
End；
The driver unit includes vibration excitor, signal generator and power amplifier, and the vibration excitor is arranged in vibration excitor pedestal
On, the appearance face contact of vibration excitor mandril and elliptical cylinder-shape shell, signal generator generates signal input power amplifier, power
Amplifier driving vibration excitor evokes the deformation of elliptical cylinder-shape shell；
The detection part includes 3-dimensional digital speckle, laser displacement sensor, charge amplifier, A/D capture card, vision-based detection
System, computer and accelerometer, 3-dimensional digital speckle to be formed by painting in elliptical cylinder-shape housing outer surface, and 3-dimensional digital dissipates
Spot vision detection system within sweep of the eye, the outer surface of elliptical cylinder-shape shell, vision detection system is arranged in accelerometer
It is connect with computer, accelerometer and laser displacement sensor detect that the vibration signal of elliptical cylinder-shape shell amplifies by charge
Device and A/D capture card are transferred to computer.
2. digital speckle deformation detecting device according to claim 1, which is characterized in that the vision detection system includes
A pair of of high speed camera, camera head and camera sliding rail, the pair of high speed camera are mounted on camera head, the camera head
It is mounted on camera sliding rail.
3. digital speckle deformation detecting device according to claim 1, which is characterized in that covered with 3-dimensional digital speckle
Face be front, the accelerometer is specially three, be respectively distributed in the left side, right side and rear side of oblong shell external surface,
And it is distributed in the middle section of elliptical cylinder-shape shell.
4. digital speckle deformation detecting device according to claim 1, which is characterized in that the vibration excitor is two, right
Claim the two sides that elliptical cylinder-shape shell is set.
5. digital speckle deformation detecting device according to claim 1, which is characterized in that the laser displacement sensor is
Two, it is symmetricly set on elliptical cylinder-shape housing outer surface, launching position is located at the middle position of shell vertical direction.
6. digital speckle deformation detecting device according to claim 1, which is characterized in that the 3-dimensional digital speckle covers
Capping product accounts for the one third of elliptical cylinder-shape housing outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821612753.8U CN208860308U (en) | 2018-09-30 | 2018-09-30 | A digital speckle deformation detection device for an elliptical cylindrical shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821612753.8U CN208860308U (en) | 2018-09-30 | 2018-09-30 | A digital speckle deformation detection device for an elliptical cylindrical shell |
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| Publication Number | Publication Date |
|---|---|
| CN208860308U true CN208860308U (en) | 2019-05-14 |
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ID=66420053
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821612753.8U Expired - Fee Related CN208860308U (en) | 2018-09-30 | 2018-09-30 | A digital speckle deformation detection device for an elliptical cylindrical shell |
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Cited By (2)
| 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 |
| CN111947598A (en) * | 2020-07-24 | 2020-11-17 | 南京理工大学 | 360° three-dimensional head measurement method based on flat mirror |
-
2018
- 2018-09-30 CN CN201821612753.8U patent/CN208860308U/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 |
| CN111947598A (en) * | 2020-07-24 | 2020-11-17 | 南京理工大学 | 360° three-dimensional head measurement method based on flat mirror |
| CN111947598B (en) * | 2020-07-24 | 2022-04-01 | 南京理工大学 | 360-degree three-dimensional human head measuring method based on plane reflector |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190514 Termination date: 20210930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |