CN108760234A - A kind of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies - Google Patents
A kind of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to flow field survey fields contactless in experimental fluid mechanics, and in particular to a kind of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies.The present invention couples particle image velocimetry (PIV) technology and particle picture tracking (PTV) technology, the fluid particle in simultaneously index liquid flow field is replaced with the minimum trace particle of scale, intersect boundary with liquid in solid to be marked using rhodamine reagent, under the irradiation of wavelength 532nm laser, with the object boundary movement locus of high speed camera record labeled fluid particle movement locus and label, the flowing information in flow field and the movable information of object can be obtained in primary experiment simultaneously, avoid the DATA REASONING error between repetition experiment, reduce test work load and cost.
Description
Technical field
The present invention relates to flow field survey fields contactless in experimental fluid mechanics, and in particular to one kind based on PIV and
Fluid flowing and solids movement synchronizing information test method and the device of PTV technologies.
Background technology
The presence of the complexity such as turbulent flow, vortex UNSTEADY FLOW makes the single-point of traditional Flow Visualization Technologies in hydrodynamics
Measure the demand for having been unable to meet the cognition of people's fluid flow.This just needs new measuring technique, realizes FLOW VISUALIZATION by list
Point is measured to multiple spot, flat space-oriented, stable state to transient state, single-phase to multiphase development, (Sheng Senzhi, Xu Yueting, Yuan Hui make tranquil last decades
To flow new development [J] mechanics and practice, 2002,24 (5) of measuring technique:1-14.).In the 1980s, particle picture
(Particle Image Velocimetry, the PIV) technology that tests the speed realizes a little flow field survey to face, with traditional test hand
Section is one of most important breakthrough of modern age Flow Visualization Technologies compared to having the advantages that the measurement of contactless, transient state, the overall situation.At this
Kind is carried out by trace particle image in the Flow Visualization Technologies of information of flow reduction, according to the size of trace particle density in flow field
Three kinds of forms are divided into, single trace particle, referred to as particle picture can be detected when trace particle density is relatively low in image
(Particle Tracking Velocimetry, the PTV) technology of tracking；System need to be used when trace particle density is medium in image
Meter standard carries out Particle evaluations, referred to as particle image velocimetry (Particle Image Velocimetry, PIV) technology；Work as figure
Particle overlapped formation spot when trace particle density is higher as in, referred to as LASER SPECKLE test the speed (Laser Speckle
Velocimetry, LSV) technology (Raffel M.Particle Image Velocimetry:A Practical Guide
[M]//Particle image velocimetry:a practical guide.2007:216-216.)。
PTV technologies are the movement locus for removing to analyze limited a fluid particle in flow field from the viewpoint of Lagrangian angle, and
PIV technologies and LSV technologies are that fluid micellar movement global in analysis flow field is gone from the viewpoint of Euler angle, are believed in flow field flow
Measurement in terms of breath has good precision compared to LSV, PIV and PTV and is widely used in experimental fluid mechanics.Usually
People are only used only above-mentioned a certain method and go to measure the movable information of fluid, i.e., only there was only liquid flow in observation area
Information, such as the trailing vortex region of cylinder, aerofoil profile tail region (Wang Yong, Hao Nansong, Geng Zihai, etc..
But people increasingly catch at the mechanism to interact between fluid and solid, observe new flow phenomenon, are carrying out at present
When testing experiment, carry out stream field information usually using PIV technologies first and measure, then carry out repeat test operating speed meter or
Image observation method is observed the movable information of solid, and this method can obtain the flowing information in flow field or obtain
The movable information of object is obtained, but is independently to carry out between testing twice, there is certain uncertainty, and operate in this way
Test work load can be made to be multiplied (Shams A, Jalalisendi M, Porfiri M.Experiments on the
water entry of asymmetric wedges using particle image velocimetry[J].Physics
of Fluids,2015,27(2):060803-612.).A kind of fluid flowing based on PIV and PTV technologies proposed by the present invention
With solids movement synchronizing information test method and device, the flowing information and object in flow field can be obtained simultaneously in primary experiment
Movable information, it is easy to operation and realize, avoid repetition experiment between systematic error, reduce test work load, improve
The efficiency that test data obtains.
Invention content
The present invention provides a kind of, and the fluid based on PIV and PTV technologies flows and solids movement synchronizing information test method
And device, the purpose is to obtain object in flow field using PTV technologies while application PIV technologies obtain flow field flow structure
Movable information avoids the systematic error between repetition experiment, reduces test work load.
The object of the present invention is achieved like this：
A kind of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies, it is specific to wrap
Include following steps：
1. cloth marks flow field sprinkled with the trace particle of even concentration in the flow field of test zone, the trace particle density
It is equal with fluid media (medium).
2. using the boundary part with liquid intersection in rhodamine reagent label solid, the outer of solid boundaries is recorded
Shape, the position of reagent label and the size of label.
3. when experimental test, the laser of wavelength 532nm and corresponding sheet laser are formed in laser sheet optical irradiation test zone
Flow field and solid, the trace particle in flow field can be activated under the irradiation of laser to be illuminated, and the light of wavelength 532nm is reflected,
These trace particles being illuminated represent the fluid particle in flow field, while what is be illuminated also has in solid side in flow field
Boundary, can reflect the solid boundaries part of no rhodamine reagent the light of 532nm under the irradiation of laser, and have rhodamine
The solid boundaries part of reagent can reflect the light of 625nm under the irradiation of 532nm laser, these solid boundaries being illuminated
Displacement information is similarly represented as the movable information of object.
4. the flowing in flow field and the movement of object in the high speed camera shooting test zone with 625nm low pass optical filterings,
The effect of 625nm low pass optical filterings is that light of the wavelength less than 625nm is only made to pass through filter, filters out the light of high wavelength, therefore,
High speed camera with filter can record the trace particle in liquid flow field by illuminated with laser light and be not coated with rhodamine reagent
Solid boundaries part, the part for being coated with rhodamine reagent are shown as black in high speed camera, are expressed as the missing of solid boundaries,
I.e. image pixel value is 0.
5. the calibration of test system, the process of calibration is actually that high speed camera is made to shoot the pixel letter in photo
Breath is corresponded with actual spatial position, and the size of trace particle image has reacted the sky of actual object in test zone
Between size.
6. application particle picture processing module to high speed camera shoot include solid boundaries information particle picture into
Row processing, using the stream for carrying trace particle in mean filter, Gauss low-pass filters, pattern mask algorithm extraction image
Field parts of images realizes background rejecting, image enhancement and the denoising of trace particle in flow field.
7. applying Canny edge detection operators, boundary image restores solid boundaries part in operator extraction image, according to real
The calibration information and rhodamine reagent label range size on border, will only be shown as black portions due to reagent in image
Solid boundaries restore.
8. the trace particle image of cross correlation algorithm analysis particle picture processing module extraction, obtains in application PIV technologies
Liquid flow field flowing information, the solid boundaries missing information restored using particles track Algorithm Analysis particle picture processing module
Image, the movable information of the missing point are then the movable information of object, the movable information in flow field of solid are obtained, to reach
To the flow field flow and solids movement information in a testing experiment simultaneously.
The realization principle of boundary image reduction operator is as follows among the above：
1. carrying out the calibration of high speed camera image, obtained calibration information is m pixel/mm, and rhodamine reagent marks
Size be n mm, detect the solid boundaries in the flow field using Canny edge detection operators, and by pixel image two-value
Change, due to the presence of rhodamine reagent and 625nm low pass optical filterings, rhodamine can be coated at the solid boundaries that are shown in image
It is discontinuous at reagent.
2. being in the picture the center of circle using the marginal point on boundary leads to loss of learning part in image because of rhodamine reagent
A certain marginal point is scanned for using length m*n pixel as radius, if the pixel value put on circle is 0, illustrates that the point is not belonging to
Solid boundaries illustrate that the point is because rhodamine reagent leads to loss of learning part in image if the pixel value put on circle is 1
Other edge point.
3. confirming in image after above-mentioned 2 points of location information, the pixel value of this point-to-point transmission is set as 1, is abandoned on image
Rest of pixels information only shows the location information being labeled on object boundary in this sampled images, and particle is carried out according to this image
Tracing algorithm obtains the movable information of solid.
The fluid flowing that the present invention also provides a kind of based on PIV and PTV technologies is filled with the test of solids movement synchronizing information
It sets, the purpose is to what is be achieved：
A kind of fluid flowing and solids movement synchronizing information test device based on PIV and PTV technologies, specifically include fluid
, wedge block, tracer module, laser supplying module, light processing module, tracer module includes trace particle, rhodamine examination
Agent, laser supplying module include high-energy laser, sheet laser, light processing module include high speed camera, camera lens,
625nm low pass optical filterings.
The trace particle is uniformly spread in a fluid, and trace particle density is equal with fluid media (medium), rhodamine reagent label
In solid with the boundary part of liquid intersection.
The high-energy laser is located at fluid field right front, faces fluid field, and sheet laser is located at high-energy laser
Between fluid field, sheet laser is made of a spherical lens and cylindrical lens, and spherical lens is located in front of cylindrical lens.
The high speed camera is just being shown in the test zone in flow field, and 625nm low pass optical filterings are installed on the camera lens of camera.
The beneficial effects of the present invention are：Particle image velocimetry (PIV) technology and particle picture are tracked into (PTV) technology coupling
It closes, innovatively proposes that flow field flow and solids movement synchronous detecting method, easy to operation and realization avoid repetition and test it
Between systematic error, reduce test work load, improve the efficiency that test data obtains.
Description of the drawings
Fig. 1 is the entirety of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies
Structural schematic diagram；
Fig. 2 is the vertical view of fluid flowing and solids movement synchronizing information test method and device；
Fig. 3 is the front view of fluid flowing and solids movement synchronizing information test method and device；
Fig. 4 is laser component details layout drawing；
Fig. 5 is high speed camera part details layout drawing；
Fig. 6 is the test zone original image presented in high speed camera；
Fig. 7 is the flow field regions image containing trace particle in test zone；
Fig. 8 is complete object boundary image in test zone；
Fig. 9 is the object boundary location information image marked by rhodamine reagent in test zone；
Figure 10 is that the fluid flowing based on PIV and PTV technologies works with solids movement synchronizing information test method and device
Flow chart.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Fig. 1,2,3,4,5, in figure：1. high speed camera, 2. camera lens, 3.625nm low pass optical filterings, 4. Luo Dan
Bright reagent, 5. test zones, 6. whereabouts sphenoid object blocks, 7. trace particles, 8. laser sheet opticals, 9. sheet lasers, 10. high-energy swash
Light device, 11. free surfaces, 12. laser point light sources, 13. spherical lenses, 14. cylindrical lenses, 15. object boundaries, 16. are coated with sieve
Red bright reagent sites boundary image lack part, 17. are coated with rhodamine reagent sites image restoring part.It is based in the present invention
Fluid flowing and the solids movement synchronizing information test method and device of PIV and PTV technologies include high speed camera 1, camera lens
2,625nm low passes optical filtering 3, rhodamine reagent 4, sphenoid object block 6, trace particle 7, sheet laser with certain falling speed
9, high-energy laser 10.All parts space layout is as follows in the device：High speed camera 1 is just being shown in the test section in flow field
Domain, 625nm low passes optical filtering 3 are installed on the camera lens 2 of camera, and the light of 625nm is less than for filtering camera entering light medium wavelength；
The laser point light source 12 that high-energy laser 10 projects is formed by sheet laser 9 has certain thickness laser sheet optical 8；Laser piece
Light source 9 is made of a spherical lens 13 and cylindrical lens 14, and the main function of spherical lens 13 is carried out to laser point light source
It focuses, control forms the thickness of piece light, and the main function of cylindrical lens 14 is that laser point light source is expanded into fan-shaped laser
Piece light 8；Laser sheet optical 8 irradiates upwards from the lower section of test zone, activates the trace particle 7 in flow field, and illuminate sphenoid object
6 boundary of block；Rhodamine reagent 4 is coated in the bottom end boundary of sphenoid object block 6 to be marked, sphenoid object block 6 is with certain first
Speed enters in water, attacks, high speed camera 1 to during attack information of flow and object of which movement information be acquired.
When carrying out fluid flowing with the test of solids movement synchronizing information, cloth is equal sprinkled with concentration in the flow field of test zone
Even trace particle marks flow field, and the trace particle density is equal with fluid media (medium).It is marked in solid using rhodamine reagent
With the boundary part of liquid intersection, the shape of solid boundaries, the position of reagent label and the size of label are recorded.Wavelength
The laser of 532nm and corresponding sheet laser form flow field and solid in laser sheet optical irradiation test zone, the tracer in flow field
Particle can be activated under the irradiation of laser to be illuminated, and reflects the light of wavelength 532nm, these trace particles being illuminated represent
Fluid particle in flow field, while what is be illuminated also has in solid boundaries in flow field, for the solid of no rhodamine reagent
Boundary part can reflect the light of 532nm under the irradiation of laser, and have the solid boundaries part of rhodamine reagent to swash in 532nm
The light of 625nm can be reflected under the irradiation of light, the displacement information of these solid boundaries being illuminated is similarly represented as the fortune of object
Dynamic information.The flowing in flow field and the movement of object in high speed camera shooting test zone with 625nm low pass optical filterings,
The effect of 625nm low pass optical filterings is that light of the wavelength less than 625nm is only made to pass through filter, filters out the light of high wavelength, therefore,
High speed camera with filter can record the trace particle in liquid flow field by illuminated with laser light and be not coated with rhodamine reagent
Solid boundaries part, the part for being coated with rhodamine reagent are shown as black in high speed camera, are expressed as the missing of solid boundaries,
I.e. image pixel value is 0.The calibration of test system, the process of calibration are actually that high speed camera is made to shoot in photo
Pixel Information is corresponded with actual spatial position, and the size of trace particle image has reacted practical object in test zone
The space size of body.Using particle picture processing module to high speed camera shoot include solid boundaries information particle picture
It is handled, is extracted using mean filter, Gauss low-pass filters, pattern mask algorithm and carry trace particle in image
Flow field portion image realizes background rejecting, image enhancement and the denoising of trace particle in flow field.It is calculated using Canny edge detections
Son, boundary image restore solid boundaries part in operator extraction image, are marked according to actual calibration information and rhodamine reagent
Range size is only restored the solid boundaries for being shown as black portions in image due to reagent.Using PIV technologies
The trace particle image of middle cross correlation algorithm analysis particle picture processing module extraction, obtains liquid flow field flowing information, uses
The solid boundaries missing information image that particles track Algorithm Analysis particle picture processing module restores, the movement letter of the missing point
Breath is then the movable information of object, obtains the movable information in flow field of solid, same in a testing experiment to reach
When flow field flow and solids movement information.
As shown in Fig. 6,7,10, Fig. 6 is the original of a certain moment in the sphenoid object block dropping process that high speed camera 1 is shot
Image, trace particle 7, free surface 11 and object boundary 15 can clearly indicate in the picture, and due to by rhodamine reagent
The light that the part of label 4 emits, high speed camera are captured less than therefore the part can be shown as blank in image.Using
Particle picture processing module divides the original image, the image for only including flow field trace particle is obtained, such as Fig. 7 institutes
Show, and flow field flow information when cross-correlation analysis obtains experimental test is carried out to trace particle image；Included simultaneously
The image of solid boundaries movable information, and will be restored due to boundary image lack part 16 caused by rhodamine reagent 4, it obtains
To the image restoring information 17 of labelled-moieties.The realization principle that boundary image restores operator is as follows：Carry out high speed camera image
Calibration, obtained calibration information be m pixel/mm, and rhodamine reagent label size be n mm, using the edges Canny
Detective operators are detected in solid boundaries in flow field, and by pixel image binaryzation, due to rhodamine reagent and 625nm low passes
The presence of optical filtering, at the solid boundaries shown in image can be coated with it is discontinuous at rhodamine reagent.In the picture with boundary
Marginal point to be the center of circle lead to a certain marginal point of loss of learning part in image because of rhodamine reagent, with length m*n
Pixel scans for for radius, if the pixel value put on circle is 0, illustrates that the point is not belonging to solid boundaries, if the picture put on circle
Element value is 1, then illustrates that the point is because rhodamine reagent leads to the other edge point of loss of learning part in image.Confirm in image
After above-mentioned 2 points of location information, the pixel value of this point-to-point transmission is set as 1, abandons rest of pixels information on image, this master drawing
The location information being labeled on object boundary is only shown as in, carrying out particles track algorithm according to this image obtains the fortune of solid
Dynamic information.
As shown in FIG. 8 and 9, will be regarded as with object of which movement by the part 17 that rhodamine reagent 4 marks on object boundary and
The particle of movement obtains the movable information of labeled point according to particle picture tracing algorithm, here it is the movable information of object,
To realize the flowing information in flow field and the movable information of object are obtained in a test experiments simultaneously.The present invention is by particle figure
As (PIV) technology and particle picture tracking (PTV) technology coupling of testing the speed, innovatively propose that flow field flow is synchronous with solids movement
Test method suitable for such as concussion cylinder experiment, swings overboard attacks of Airfoil Testing, object and tests etc. test zones and both included
The testing experiment of flow field flow and solids movement can obtain the flowing information in flow field and the fortune of object simultaneously in primary experiment
Dynamic information, it is easy to operation and realize, avoid the DATA REASONING error between repetition experiment, reduce test work load and at
This.
The present invention provides a kind of, and the fluid based on PIV and PTV technologies flows and solids movement synchronizing information test method
And device, the purpose is to obtain object in flow field using PTV technologies while application PIV technologies obtain flow field flow structure
Movable information avoids the systematic error between repetition experiment, reduces test work load.Test zone of the present invention is
The region of fluid and solid interaction, including liquid flow field and solid structure object.It was carrying out between fluid and solid mutually in the past
When Experiment on Function, the test that flow field flow is tested with solids movement is distinguished in the case of usual guarantee test operating mode is identical
Come, but the uncertainty of experimental system in this way can cause test result certain error.
The object of the present invention is achieved like this：Based on PIV (Particle Image Velocimetry, PIV) technology
Basic principle, using the minimum trace particle of scale come approximately replace and index liquid flow field in fluid particle, pass through
Wavelength 532nm lasers are shown and the trace particle at calibration fluid particle, using the labeled fluid of high speed camera record
The track of point movement is reappeared the velocity vector of fluid particle by the extremely short time interval of high speed camera, obtained in test zone
Flow field flow information, while based on PTV (Particle Tracking Velocimetry, PTV) technology basic principle,
It under the irradiation of wavelength 532nm laser, is marked using rhodamine reagent at solid boundaries, quilt is recorded using high speed camera
The object boundary movement locus of label obtains the solids movement information in test zone.Not only including flow field but also including solid
In test zone, the flowing in flow field can act on solid structure object, and works is made to move, while in structure in flow field
Object moves the fluidal texture that can change flow field, and the two influences each other, and generates a series of unsteady phenomenon.In order to realize fluid stream
The dynamic synchronism detection with solids movement information need to come cloth in the flow field of test zone sprinkled with the trace particle of even concentration first
Flow field is marked, the trace particle density is close with fluid media (medium), silver-plated hollow glass ball and polyamide grain for liquid water
Son etc. is all good selection, and solid carbon dioxide and polystyrene etc. are good selections for gas, and tracer
The concentration of particle is suitable, too low, is not enough to show the fluidal texture in entire flow field, excessively high, forms laser speckle, uses simultaneously
Rhodamine reagent removes the boundary part with liquid intersection in label solid, need to record the shape of solid boundaries, reagent label
Position and label size.Secondly when experimental test, the laser of wavelength 532nm and corresponding sheet laser form laser sheet optical
The flow field in test zone and solid are irradiated, the trace particle in flow field can be activated under the irradiation of laser to be illuminated, and is reflected
The light of wavelength 532nm, these trace particles being illuminated then represent the fluid particle in flow field, while what is be illuminated also has place
The solid boundaries in flow field can reflect 532nm for the solid boundaries part of no rhodamine reagent under the irradiation of laser
Light, and the light for having the solid boundaries part of rhodamine reagent that can reflect 625nm under the irradiation of 532nm laser, these quilts
The displacement information of the solid boundaries illuminated is similarly represented as the movable information of object.Later, the height of 625nm low pass optical filterings is carried
The flowing in flow field and the movement of object in fast camera shooting test zone, the effect of 625nm low pass optical filterings is only to make wavelength
Light less than 625nm filters out the light of high wavelength by filter.Therefore, the high speed camera with filter can record liquid
By the trace particle of illuminated with laser light and the solid boundaries part for being not coated with rhodamine reagent in flow field, it is coated with the portion of rhodamine reagent
Divide and be shown as black in high speed camera, be expressed as the missing of solid boundaries, is i.e. image pixel value is 0.Then experiment survey is carried out
The calibration of test system, the process of calibration are actually that high speed camera is made to shoot the Pixel Information in photo and actual space bit
It sets and is corresponded, the size of trace particle image reacts the space size of actual object in this test zone.Then, it applies
What particle picture processing module shot high speed camera includes that the particle picture of solid boundaries information is handled, using mean value
Filter, Gauss low-pass filters, pattern mask algorithm etc. extract the flow field portion image that trace particle is carried in image, real
Background rejecting, image enhancement and the denoising of trace particle in existing flow field, using Canny edge detection operators, boundary image reduction
Operator etc. extracts solid boundaries part in image, according to actual calibration information and rhodamine reagent label range size, only
The solid boundaries for being shown as black portions in image due to reagent are restored.Finally, using cross-correlation in PIV technologies
The trace particle image of Algorithm Analysis particle picture processing module extraction, obtains liquid flow field flowing information；Use particles track
The movable information of the solid boundaries missing information image that Algorithm Analysis particle picture processing module restores, the missing point is then object
The movable information of body obtains the movable information in flow field of solid, to reach the flow field in a testing experiment simultaneously
Flowing and solids movement information.
The realization principle of boundary image reduction operator is as follows among the above：Carry out the calibration of high speed camera image, obtained mark
It is m pixel/mm to determine information, and the size of rhodamine reagent label is n mm, and source is detected using Canny edge detection operators
The solid boundaries in flow field, and by pixel image binaryzation, due to the presence of rhodamine reagent and 625nm low pass optical filterings, figure
At solid boundaries shown in as in can be coated with it is discontinuous at rhodamine reagent.It is as the center of circle using the marginal point on boundary in the picture
Because rhodamine reagent leads to a certain marginal point of loss of learning part in image, scanned for using length m*n pixel as radius,
If the pixel value put on circle is 0, illustrate that the point is not belonging to solid boundaries, if the pixel value put on circle is 1, illustrates that the point is
Because rhodamine reagent leads to the other edge point of loss of learning part in image.Confirm in image after this 2 points location information,
The pixel value of this point-to-point transmission is set as 1, rest of pixels information on image is abandoned, is only shown on object boundary in this sampled images
Labeled location information carries out particles track algorithm according to this image and obtains the movable information of solid.
Claims (10)
1. a kind of fluid flowing and solids movement synchronizing information test method based on PIV and PTV technologies, which is characterized in that packet
Include following steps：
Step 1：Based on the basic principle of PIV technologies, the fluid particle in simultaneously marked fluid field is replaced with trace particle (7)；
Step 2：Pass through the trace particle (7) at wavelength 532nm lasers (10) display and calibration fluid particle；
Step 3：With the track of the labeled fluid particle movement of high speed camera (1) record, pass through the high speed camera extremely short time
Interval reappears the velocity vector of fluid particle, obtains the flow field flow information in test zone (5)；
Step 4：Based on the basic principle of PTV technologies, under the irradiation of wavelength 532nm laser, Luo Dan is used at solid boundaries
Bright reagent (4) is marked, and using the labeled object boundary movement locus of high speed camera record, obtains consolidating in test zone
Body movable information.
2. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：Cloth comes sprinkled with the trace particle (7) of even concentration in the flow field of test zone (5) in the step 3
Mark flow field, the trace particle density equal with fluid media (medium).
3. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：With the boundary part with liquid intersection in rhodamine reagent (4) label solid, sieve in the step 4
The width range that red bright reagent is smeared is in 1mm between 3mm.
4. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：The laser (10) and sheet laser (9) of the step 2 medium wavelength 532nm forms laser piece (8) illumination
The flow field in test zone and solid are penetrated, trace particle (7) reflects the light of wavelength 532nm, and trace particle represents in flow field
Fluid particle, the solid boundaries part of no rhodamine reagent (4) can reflect the light of 532nm under the irradiation of laser, there is sieve
The solid boundaries part of red bright reagent (4) can reflect the light of 625nm, the solid side being illuminated under the irradiation of 532nm laser
The displacement information on boundary represents the movable information of object.
5. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：The step 3 high speed camera (1) carries 625nm low passes optical filtering (3), high speed camera (1) shooting
The flowing in flow field and the movement of object in test zone (5), high speed camera (1) can be recorded in liquid flow field by illuminated with laser light
Trace particle (7) and the solid boundaries part (17) for being not coated with rhodamine reagent, are coated with the solid boundaries part of rhodamine reagent
(16) it is shown as black in high speed camera (1), is expressed as the missing of solid boundaries, is i.e. image pixel value is 0.
6. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：In the step 2 size of trace particle image reacted actual object in test zone space it is big
It is small, so that the Pixel Information that high speed camera is shot in photo is corresponded with actual spatial position.
7. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：What the high speed camera was shot includes the particle picture of solid boundaries (15) information, using particle figure
As processing module handles it, using in mean filter, Gauss low-pass filters, pattern mask algorithm extraction image
Flow field portion image with trace particle realizes background rejecting, image enhancement and the denoising of trace particle in flow field.
8. a kind of fluid flowing based on PIV and PTV technologies according to claim 1 is tested with solids movement synchronizing information
Method, it is characterised in that：What the high speed camera was shot includes the particle picture of solid boundaries (15) information, using Canny
Solid boundaries part in edge detection operator, boundary image reduction operator extraction image, according to actual calibration information and Luo Dan
Bright reagent (4) label range size, restores the solid boundaries for being shown as black portions in image due to reagent.
9. a kind of fluid flowing based on PIV and PTV technologies according to claim 7 is tested with solids movement synchronizing information
Method, it is characterised in that：The trace particle of the particle picture processing module extraction is analyzed using cross correlation algorithm in PIV technologies
Image obtains liquid flow field flowing information, is consolidated using what particle picture processing module described in particles track Algorithm Analysis restored
The movable information of body boundary missing information image, the missing point is exactly the movable information of object.
10. a kind of fluid flowing and solids movement synchronizing information test device based on PIV and PTV technologies, it is characterised in that：Packet
Include fluid field test zone (5), wedge block (6), tracer module, laser supplying module, light processing module, the tracer mould
Block includes trace particle (7), rhodamine reagent (4), and laser supplying module is located at fluid field right, including high-energy laser
(10), sheet laser (9), light processing module face fluid field, including high speed camera (1), camera lens (2), 625nm low passes
Optical filtering (3), the trace particle (7) are uniformly spread in a fluid, and trace particle density is equal with fluid media (medium), rhodamine reagent
(4) mark boundary part with liquid intersection in solid, sheet laser (9) be located at high-energy laser (10) and fluid field it
Between, sheet laser (9), high-energy laser (10) are located along the same line with fluid field three, and sheet laser is by a spherical lens
(13) it is located in front of cylindrical lens (14) with cylindrical lens (14) composition, spherical lens (13), the high speed camera (1) is just being shown in
Test zone (5) in flow field, 625nm low passes optical filtering (3) are installed on the camera lens (2) of camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810569678.XA CN108760234B (en) | 2018-06-05 | 2018-06-05 | Method and device for synchronously testing fluid flow and solid motion information based on PIV (particle image velocimetry) and PTV (particle beam velocimetry) technologies |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109580167A (en) * | 2018-12-24 | 2019-04-05 | 北京理工大学 | A kind of high-speed camera suitable for moving boundary flow field and PIV synchronized measurement system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281346A (en) * | 1997-10-10 | 2001-01-24 | 西托维亚公司 | Novel fluorescent reporter molecules and their applications, including assays for caspases |
| CN104696233A (en) * | 2015-03-10 | 2015-06-10 | 中国计量学院 | Method for calibrating numerical simulation results of inner flow field in centrifugal pump |
| CN107976154A (en) * | 2017-11-16 | 2018-05-01 | 北京工业大学 | A kind of measuring method of the passage up/down wall profile based on fluorescence intensity |
| CN108020168A (en) * | 2017-11-23 | 2018-05-11 | 哈尔滨工程大学 | Nearly free surface gas-liquid two-phase flow field three-dimension measuring system and measuring method based on particle image velocimetry |
-
2018
- 2018-06-05 CN CN201810569678.XA patent/CN108760234B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281346A (en) * | 1997-10-10 | 2001-01-24 | 西托维亚公司 | Novel fluorescent reporter molecules and their applications, including assays for caspases |
| CN104696233A (en) * | 2015-03-10 | 2015-06-10 | 中国计量学院 | Method for calibrating numerical simulation results of inner flow field in centrifugal pump |
| CN107976154A (en) * | 2017-11-16 | 2018-05-01 | 北京工业大学 | A kind of measuring method of the passage up/down wall profile based on fluorescence intensity |
| CN108020168A (en) * | 2017-11-23 | 2018-05-11 | 哈尔滨工程大学 | Nearly free surface gas-liquid two-phase flow field three-dimension measuring system and measuring method based on particle image velocimetry |
Cited By (21)
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