CN107015022A - Particle image velocimetry device and particle image testing method - Google Patents
Particle image velocimetry device and particle image testing method Download PDFInfo
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- CN107015022A CN107015022A CN201710448061.8A CN201710448061A CN107015022A CN 107015022 A CN107015022 A CN 107015022A CN 201710448061 A CN201710448061 A CN 201710448061A CN 107015022 A CN107015022 A CN 107015022A
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- 239000002245 particle Substances 0.000 title claims abstract description 58
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000000917 particle-image velocimetry Methods 0.000 title claims description 40
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims abstract description 10
- 238000010998 test method Methods 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 2
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- 238000009826 distribution Methods 0.000 abstract description 2
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
- G01P5/20—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance using particles entrained by a fluid stream
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Abstract
The invention provides a particle image speed measuring device and a particle image testing method, and relates to the technical field of three-dimensional flow field testing. The particle image speed measuring device comprises a laser system, an acquisition system, a synchronization system and a data processing system. The laser system is used for generating two light sources with light wave vibration directions perpendicular to each other, and each light source irradiates one section. The acquisition system is connected with the data processing system and is used for acquiring the image data of the particles on the cross section and sending the image data to the data processing system. The synchronous system is respectively connected with the laser system and the acquisition system and is used for controlling the laser system and the acquisition system to be synchronously opened and closed. The data processing system is used for storing the image data and analyzing the three-dimensional flow field distribution according to the image data. The particle image velocimeter has convenient operation and control and accurate test result. The particle image testing method provided by the invention adopts the particle image velocimeter, and the analysis and test result is accurate and reliable.
Description
Technical field
The present invention relates to three-dimensional flow field technical field of measurement and test, in particular to a kind of particle image velocimetry device and grain
Subgraph method of testing.
Background technology
Flow field measurement technique moves important laboratory facilities as Study of Fluid, and the upgrading of its technology is for related discipline
Research has larger facilitation.Particle image velocimetry (Particle Image Velocimetry) PIV is 20th century 80
A kind of transient state that age grows up, contactless type, whole flow field quantitative measurement techniques.It combines spot measurement and FLOW VISUALIZATION
The advantage of technology, both with high accuracy and high-resolution, there is that to result in overall structure and transient state that Plane Fluid Field shows average
Image.
Three dimensional particles image speed measurement (abbreviation SPIV) system of foreign latest uses 3-D digital camera technique, i.e., using many
Platform camera records a section in illuminated flow field from different azimuth, according to two camera space position projection relations and regards
Difference, is the space three-dimensional coordinate of any by each two dimensional coordinate map of two cameras, by two twodimensional displacement fields of two cameras
The space 3-D displacement field of any is mapped as, so as to complete the reconstruction of particles spatial displacement field and velocity field.Finally, by prior
The algorithm of setting obtains the velocity field and pressure field in flow field etc..But its experiment porch is relative complex, the erection of multiple cameras and
The more difficult control of Synchronization Control, it is higher to experiment manipulation request, surveys as single section.
Incident laser is separated into different face by some domestic three dimensional particles image speed measurement systems using prism light-dividing device
The piece light irradiation of color installs before camera lens the optical filter of a certain particular color additional in test zone, so as to shoot not
With the speed flowing field information of section.This mode causes the light wave of a certain color of shooting area, and its luminous intensity not enough easily causes bat
Taking the photograph result has larger experimental error.Or other test systems pass through particle in single camera formation different visual angles Fluid field
Imaging, carries out three-dimensional localization and tracking to particle according to the particle imaging of different visual angles, obtains three dimensions flow field.This mode
The Three-dimensional Flow information in flow field can not be shot simultaneously, and test result error is larger.
In view of this, design and manufacture a kind of particle image velocimetry device, the sync pulse jamming of three-dimensional flow field can be realized, carried
Go out a kind of accurate, practical, two section synchro measures Particle Image Velocimetry in current three-dimensional flow field technical field of measurement and test
It is particularly important.
The content of the invention
It is an object of the invention to provide a kind of particle image velocimetry device, the sync pulse jamming of three-dimensional flow field can be realized,
The Cross shaft feature of particle is accurately obtained by way of two section synchro measures, practical, manipulation is convenient, surveys
Measure result accurate, advantage of lower cost.
The present invention also aims to provide a kind of particle picture method of testing, filled using above-mentioned particle image velocimetry
Put, manipulation is convenient, measurement result is accurately reliable.
The present invention, which improves its technical problem, to be realized using following technical scheme.
A kind of particle image velocimetry device that the present invention is provided, the particle image velocimetry device includes laser system, adopted
Collecting system, synchronization system and data handling system.
The laser system is used to produce two orthogonal light sources of light wave direction of vibration, each light source irradiation one
Individual section.The acquisition system is connected with the data handling system, and the acquisition system is used to gather the grain on the section
The view data of son simultaneously sends described image data to the data handling system.The synchronization system swashs with described respectively
Photosystem, acquisition system connection, for controlling the laser system and the acquisition system synchronously unlatching, close synchronously.
The data handling system is used to preserve described image data, and goes out Cross shaft according to described image data analysis.
Further, the laser system includes first laser device and second laser, and the first laser device is used to send out
Go out the first light source, the second laser is used to send secondary light source, and the light wave of first light source and the secondary light source shakes
Dynamic direction is mutually perpendicular to.
Further, the laser system also includes the first polarizer and the second polarizer.First polarizer is installed
In on the first laser device, the direction of vibration for changing first light source.Second polarizer is installed on described
On dual-laser device, for changing the direction of vibration of the secondary light source, and make the light wave direction of vibration of the secondary light source with
The light wave direction of vibration of first light source is vertical.
Further, the acquisition system includes the first video camera and the second video camera, and first video camera is used to clap
The section of the first laser device irradiation is taken the photograph, second video camera is used for the section for shooting the second laser irradiation.
Further, the acquisition system also includes the 3rd polarizer and the 4th polarizer, and the 3rd polarizer is installed
In on first video camera, for filtering the light sent on the second laser, the 4th polarizer is installed on described
On second video camera, for filtering the light sent on the first laser device.
Further, first video camera includes the first camera lens, and second video camera includes the second camera lens, described the
Three polarizers are installed on before first camera lens, in order to which first video camera only photographs the first laser device irradiation
Section；4th polarizer is installed on before second camera lens, in order to which second video camera only photographs described second
The section of laser illumination.
Further, first video camera and second video camera use charge coupling device imaging sensor.
Further, the synchronization system is included with frequency device, the same frequency device respectively with the first laser device, described the
Dual-laser device is electrically connected, to control the first laser device, the second laser while opening and simultaneously closing off；The same frequency
Device images mechatronics with first video camera, described second respectively, to control first video camera, second shooting
Machine is shot simultaneously.
Further, the data handling system includes the first computer and second computer, first computer point
Not with the first laser device, it is described first shooting mechatronics, the second computer respectively with the second laser, institute
State the second shooting mechatronics；The same frequency device calculates mechatronics with described first.
A kind of particle picture method of testing that the present invention is provided, using above-mentioned particle image velocimetry device.Using with frequency
Device opens first laser device, second laser, the first video camera and the second video camera, and described first is observed on the first computer
The particle picture data that video camera is shot, adjust the first camera lens of first video camera, are allowed to shoot the first laser device
The section of irradiation.Adjust the second polarizer angle on the second laser, so that the first video camera can not shoot described
The section of dual-laser device irradiation.Adjust the first polarizer angle on first laser device, the first shooting function is shot completely
The section irradiated to the first laser device.
The particle picture data that second video camera is shot are observed on second computer, second video camera is adjusted
The second camera lens, be allowed to shoot the section of the second laser irradiation.Adjust the 4th polarizer angle of second video camera
Spend, cause the second shooting function to photograph the section of the second laser irradiation completely.
The first laser device, the second laser, first video camera and described are opened using the same frequency device
Second video camera, analyzes the particle picture data of shooting on first computer and the second computer respectively, and leads to
The synchronous flow field that particle picture technology draws different section is crossed, carrying out Conjoint Analysis finally by mobile test section obtains three-dimensional
Field Characteristics.
The particle image velocimetry device and particle picture method of testing that the present invention is provided have the beneficial of the following aspects
Effect：
The particle image velocimetry device that the present invention is provided, including laser system, acquisition system, synchronization system and data processing
System.Laser system is used to produce two orthogonal light sources of light wave direction of vibration, and each light source irradiates a section.Pass through
Acquisition system is connected with data handling system, the view data of the particle on collection section simultaneously sends view data to number
According to processing system.By the way that synchronization system is connected with laser system, acquisition system respectively, for controlling laser system and collection to be
The synchronous unlatching of system, close synchronously.Data handling system is used to preserve view data, and goes out three-dimensional flow field according to analysis of image data
Distribution.The particle image velocimetry device realizes two sections and shot simultaneously, and manipulation is convenient, and test result is accurate.
The particle picture method of testing that the present invention is provided, it is same using same frequency device using above-mentioned particle image velocimetry device
Step opens first laser device, second laser, the first video camera and the second video camera, and the first video camera and first are calculated into electromechanical
Connection, adjusts the first camera lens of the first video camera, is allowed to only shoot the particle on the section of first laser device irradiation；Second is taken the photograph
Camera is electrically connected with second computer, is adjusted the second camera lens of the second video camera, is allowed to only shoot cutting for second laser irradiation
Particle on face.So can analysis is shot simultaneously on the first computer and second computer respectively two different cross sections
Particle picture data, and the synchronous flow field of different section is drawn by particle picture technology, enter finally by mobile test section
Row Conjoint Analysis obtains three-dimensional flow field feature.Particle picture method of testing manipulation is simple and convenient, and test result is accurately reliable, surveys
Advantage of lower cost is tried, with great application value.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
The composition frame chart for the particle image velocimetry device that Fig. 1 provides for the specific embodiment of the invention；
The concrete composition block diagram for the particle image velocimetry device that Fig. 2 provides for the specific embodiment of the invention；
The application scenarios schematic diagram for the particle image velocimetry device that Fig. 3 provides for the specific embodiment of the invention；
The operating procedure flow chart for the particle picture method of testing that Fig. 4 provides for the specific embodiment of the invention.
Icon：100- particle image velocimetry devices；101- test zones；The sections of 102- first；The sections of 103- second；104-
Trace particle；110- laser systems；111- first laser devices；113- second lasers；The polarizers of 1111- first；1131- second
Polarizer；120- acquisition systems；The video cameras of 121- first；The video cameras of 123- second；The polarizers of 1211- the 3rd；1231- the 4th is inclined
Shake piece；130- synchronization systems；131- is with frequency device；140- data handling systems；The computers of 141- first；143- second computers.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
In the description of the invention, it is to be understood that the orientation or position relationship of the instruction such as term " on ", " under " are base
The orientation or position relationship usually put when orientation shown in the drawings or position relationship, or product of the present invention are used, or
Person is the orientation or position relationship that those skilled in the art usually understand, is for only for ease of the description present invention and simplifies description,
Rather than indicate or imply that signified equipment or element must have specific orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
" first ", " second " of the present invention etc., is used only for being distinguish between in description, not special implication.
In the description of the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can be
It is joined directly together, can also be indirectly connected to by intermediary.For the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
The composition frame chart for the particle image velocimetry device 100 that Fig. 1 provides for the specific embodiment of the invention, refer to Fig. 1.
A kind of particle image velocimetry device 100 that the present invention is provided, particle image velocimetry device 100 includes laser system
110th, acquisition system 120, synchronization system 130 and data handling system 140.
Laser system 110 is used to produce two orthogonal light sources of light wave direction of vibration, and each light source irradiates one and cut
Face.Acquisition system 120 is connected with data handling system 140, and acquisition system 120 is used for the picture number for gathering the particle on section
Sent according to and by view data to data handling system 140.Synchronization system 130 respectively with laser system 110, acquisition system 120
Connection, for controlling laser system 110 and the synchronous unlatching of acquisition system 120, close synchronously.Data handling system 140 is used to protect
View data is deposited, and Cross shaft is gone out according to analysis of image data.
The concrete composition block diagram for the particle image velocimetry device 100 that Fig. 2 provides for the specific embodiment of the invention, Fig. 3 is this
The application scenarios schematic diagram for the particle image velocimetry device 100 that invention specific embodiment is provided, refer to Fig. 2 and Fig. 3.In Fig. 3
Direction shown in arrow represents flowing mostly in flow field.
Specifically, in the present embodiment, laser system 110 includes first laser device 111, second laser 113, first and polarized
The polarizer 1131 of piece 1111 and second, first laser device 111 is used to send the first light source, and the first polarizer 1111 is installed on first
On laser 111, the direction of vibration for changing the first light source.Second laser 113 is used to send secondary light source, the second polarization
Piece 1131 is installed on second laser 113, for changing the direction of vibration of secondary light source, and makes the first light source and the second light
The light wave direction of vibration in source is mutually perpendicular to, and the light wave reflected for the trace particle 104 being illuminated on different cross section is in vibration side
To being also mutually perpendicular to.
Acquisition system 120 includes the first video camera 121, the second video camera 123, the 3rd polarizer 1211 and the 4th polarizer
1231, the first video camera 121 includes the first camera lens, and the second video camera 123 includes the second camera lens.
3rd polarizer 1211 is installed on the first video camera 121, specifically, is installed on before the first camera lens, for filtering
The light sent on second laser 113 so that the first video camera 121 is only used for shooting the section of the irradiation of first laser device 111, and
The section of the irradiation of second laser 113 can not be photographed, while also not influenceed by the light source that second laser 113 is sent.
4th polarizer 1231 is installed on the second video camera 123, specifically, is installed on before the second camera lens, for filtering
The light that first laser device 111 is sent so that the second video camera 123 only photographs the section of the irradiation of second laser 113, and can not
The section of the irradiation of first laser device 111 is photographed, while also not influenceed by the light source that first laser device 111 is sent.
So because the effect of polarizer causes the sheet laser of different cross section to be mutually perpendicular on the direction of vibration of light wave, and
Placement with video camera upper polarizer cooperates, and effectively prevent the influence of light between different cross section, can realize to difference
The flow field in section synchronizes measurement.Meanwhile, by adjust first laser device 111 and second laser 113 placement angle and
Spacing, can three-dimensionally observe the change procedure in flow field, and analysis calculates accurate flow field characteristic.It should be noted that in Fig. 3
Shown the first section 102 and the second section 103 is parallel to each other, it is not limited to this, two sections can be without parallel, only
The sheet laser in two sections is needed to be mutually perpendicular on the direction of vibration of light wave.
Alternatively, the first video camera 121 and the second video camera 123 are using CCD (Charge-coupled Device, electricity
Lotus coupled apparatus) video camera, i.e. charge coupling device imaging sensor, to improve the precision of particle picture shooting and clear
Degree.
Synchronization system 130 is included with frequency device 131, electric with first laser device 111, second laser 113 respectively with frequency device 131
Connection, to realize first laser device 111, second laser 113 while opening and simultaneously closing off.With frequency device 131 respectively with first
Video camera 121, the second video camera 123 are electrically connected, to realize that the first video camera 121, the second video camera 123 are shot simultaneously, it is ensured that
Synchronism.
Data handling system 140 includes the first computer 141 and second computer 143, and the first computer 141 is respectively with the
One laser 111, the first video camera 121 are electrically connected, second computer 143 respectively with second laser 113, the second video camera
123 electrical connections.Alternatively, electrically connected with frequency device 131 with the first computer 141, the first computer 141 is controlled by same frequency device 131
First laser device 111 processed, second laser 113 are opened and simultaneously closed off simultaneously, control the first video camera 121, the second video camera
123 shoot simultaneously.
The particle image velocimetry device 100 that the present invention is provided, its operation principle is as follows：
The first light source is provided using first laser device 111, the first section 102 is irradiated, second laser 113 provides the second light
The second section 103 is irradiated in source.By adjusting the first polarizer 1111 and the second polarizer 1131 so that the first light source and the second light
The light wave direction of vibration in source is mutually perpendicular to, and the light wave reflected for the trace particle 104 being illuminated on different section is in vibration side
To being also mutually perpendicular to.Two high speed CCD cameras are installed in test zone 101, installed respectively before the camera lens of every video camera
One piece of polarizer, the setting angle of adjustment polarizer causes two video cameras only to shoot wherein beam of laser section respectively, due to
Employ polarised light principle so that two shooting functions photographed the flow field of different cross section simultaneously respectively, i.e. the first video camera 121 is only
The first section 102 is shot, the second video camera 123 only shoots the second section 103.By same frequency device 131 make first laser device 111,
Second laser 113 is opened simultaneously, the first video camera 121 and the second video camera 123 are shot simultaneously, the first computer 141 and the
Two computers 143 carry out Conjoint Analysis the flow field of different cross section, obtain section correlation properties and three-dimensional flow field structure.
A kind of particle picture method of testing that the present invention is provided, using above-mentioned particle image velocimetry device 100.Using same
Frequency device 131 is synchronous to open first laser device 111, second laser 113, the first video camera 121 and the second video camera 123, by the
One video camera 121 is electrically connected with the first computer 141, adjust the first video camera 121 the first camera lens, be allowed to only shoot first swash
The particle on section that light device 111 irradiates；Second video camera 123 is electrically connected with second computer 143, the second video camera is adjusted
123 the second camera lens, the particle being allowed on the section that only shooting second laser 113 irradiates.So can be respectively in the first meter
The particle picture data for two different cross sections that analysis is shot simultaneously on calculation machine 141 and second computer 143, and pass through particle figure
As technology draws the synchronous flow field of different section, Conjoint Analysis acquisition three-dimensional flow field spy is carried out finally by mobile test section
Levy.Specific method is as follows：
The operating procedure flow chart for the particle picture method of testing that Fig. 4 provides for the specific embodiment of the invention, refer to figure
4。
S1：The focal length of the first video camera 121 is adjusted on the first section 102 that first laser device 111 irradiates.
First computer 141 opens first laser device 111, the video camera of second laser 113 and first by same frequency device 131
121, the particle picture result of the first video camera 121 shooting is observed on the image capture software of the first computer 141；Pass through
One computer 141 adjusts the focal length of the first video camera 121 on the first section 102 that first laser device 111 irradiates, that is, adjusts the
First camera lens of one video camera 121, the section for being allowed to shoot the irradiation of first laser device 111.
S11：Adjust the angle of the second polarizer 1131.Adjust the second polarizer 1131 on second laser 113 manually again
Angle, cause the first video camera 121 can not shoot second laser 113 irradiation section.
S12：Adjust the angle of the first polarizer 1111.Finally adjust 1111 jiaos of the first polarizer on first laser device 111
The section spent, enable the first video camera 121 to photograph the irradiation of first laser device 111 completely.
S2：The focal length of the second video camera 123 is adjusted on the first section 102 that second laser 113 irradiates.
First computer 141 opens first laser device 111, the video camera of second laser 113 and second by same frequency device 131
123, the particle picture result of the second video camera 123 shooting is observed on the image capture software of second computer 143；Pass through
One computer 141 adjusts the focal length of the second video camera 123 on the first section 102 that second laser 113 irradiates, that is, adjusts the
Second camera lens of two video cameras 123, the section for being allowed to shoot the irradiation of second laser 113.
S21：Adjust the angle of the 4th polarizer 1231.The angle of the 4th polarizer 1231 of the second video camera 123 of manual regulation,
The second video camera 123 is enabled to photograph the section of the irradiation of second laser 113 completely.
S3：Analysis particle picture data simultaneously obtain three-dimensional flow field feature.
First computer 141 opens first laser device 111, second laser 113, the first video camera by same frequency device 131
121 and second video camera 123, the particle picture knot photographed is observed on the first computer 141 and second computer 143 respectively
Really, the particle picture data shot are analyzed, and the synchronous flow field of different section is drawn by particle picture technology, finally by shifting
Dynamic test section carries out Conjoint Analysis and obtains three-dimensional flow field feature.
In summary, the particle image velocimetry device 100 and particle picture method of testing that the present invention is provided have following several
The beneficial effect of individual aspect：
Particle image velocimetry device 100 and particle picture method of testing that the present invention is provided, because the effect of polarizer makes
Obtain first laser device 111 and second laser 113 is mutually perpendicular in the sheet laser of different cross section on the direction of vibration of light wave, and
The light wave reflected for the trace particle 104 being illuminated on different cross section is also mutually perpendicular in direction of vibration.Meanwhile, first laser
First polarizer 1111 of device 111, the second polarization of second laser 113, the first video camera 121 the 3rd polarizer 1211 with
And second video camera 123 the 4th polarizer 1231 riding position and angle cooperate, effectively prevent between different cross section
The influence of light.Thus measurement can be synchronized to the flow field of different cross section, and by adjust the placement angle of laser with
Spacing can three-dimensionally observe the change procedure in flow field.Test equipment advantage of lower cost, test result is accurately reliable.In addition,
The simple to operate of particle picture method of testing, reliability are high, and related experiment personnel can grasp faster, it is not necessary to professional technique
Personnel's test manipulation, strong adaptability, with great application value.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various changes, combination and change.Within the spirit and principles of the invention, made
Any modification, equivalent substitution and improvements etc., should be included in the scope of the protection.
Claims (10)
1. a kind of particle image velocimetry device, it is characterised in that the particle image velocimetry device includes laser system, collection system
System, synchronization system and data handling system；
The laser system is used to produce two orthogonal light sources of light wave direction of vibration, and each light source irradiates one and cut
Face；The acquisition system is connected with the data handling system, and the acquisition system is used to gather the particle on the section
View data simultaneously sends described image data to the data handling system；The synchronization system respectively with the laser system
System, acquisition system connection, for controlling the laser system and the acquisition system synchronously unlatching, close synchronously；
The data handling system is used to preserve described image data, and goes out three-dimensional flow field point according to described image data analysis
Cloth.
2. particle image velocimetry device according to claim 1, it is characterised in that the laser system includes first laser
Device and second laser, the first laser device are used to send the first light source, and the second laser is used to send secondary light source,
The light wave direction of vibration of first light source and the secondary light source is mutually perpendicular to.
3. particle image velocimetry device according to claim 2, it is characterised in that it is inclined that the laser system also includes first
Shake piece and the second polarizer；First polarizer is installed on the first laser device, for changing first light source
Direction of vibration；Second polarizer is installed on the second laser, the direction of vibration for changing the secondary light source,
And make the light wave direction of vibration of the secondary light source vertical with the light wave direction of vibration of first light source.
4. particle image velocimetry device according to claim 2, it is characterised in that the acquisition system includes the first shooting
Machine and the second video camera, first video camera are used for the section for shooting the first laser device irradiation, second video camera
Section for shooting the second laser irradiation.
5. particle image velocimetry device according to claim 4, it is characterised in that it is inclined that the acquisition system also includes the 3rd
Shaken piece and the 4th polarizer, and the 3rd polarizer is installed on first video camera, for filtering the second laser
On the light that sends, the 4th polarizer is installed on second video camera, sent for filtering on the first laser device
Light.
6. particle image velocimetry device according to claim 5, it is characterised in that first video camera includes the first mirror
Head, second video camera includes the second camera lens, and the 3rd polarizer is installed on before first camera lens, in order to described the
One video camera only photographs the section of the first laser device irradiation；4th polarizer is installed on before second camera lens,
In order to which second video camera only photographs the section of the second laser irradiation.
7. particle image velocimetry device according to claim 4, it is characterised in that first video camera and described second
Video camera uses charge coupling device imaging sensor.
8. particle image velocimetry device according to claim 4, it is characterised in that the synchronization system is included with frequency device,
The same frequency device is electrically connected with the first laser device, the second laser respectively, to control the first laser device, described
Second laser is opened and simultaneously closed off simultaneously；The same frequency device is electromechanical with first video camera, second shooting respectively
Connection, to control first video camera, second video camera to shoot simultaneously.
9. particle image velocimetry device according to claim 8, it is characterised in that the data handling system includes first
Computer and second computer, first computer image mechatronics, institute with the first laser device, described first respectively
State second computer and image mechatronics with the second laser, described second respectively；The same frequency device and the described first meter
Calculate mechatronics.
10. a kind of particle picture method of testing, it is characterised in that using the particle picture any one of claim 1 to 9
Speed measuring device；
First laser device, second laser, the first video camera and the second video camera are opened using same frequency device, on the first computer
The particle picture data that first video camera is shot are observed, the first camera lens of first video camera is adjusted, is allowed to shoot institute
State the section of first laser device irradiation；Adjust the second polarizer angle on the second laser, cause the first video camera without
Method shoots the section of the second laser irradiation；Adjust the first polarizer angle on first laser device, cause the first shooting
Function photographs the section of the first laser device irradiation completely；
The particle picture data that second video camera is shot are observed on second computer, the of second video camera is adjusted
Two camera lenses, the section for being allowed to shoot the second laser irradiation；Adjust the 4th polarizer angle of second video camera, make
Obtain the section that the second shooting function photographs the second laser irradiation completely；
The first laser device, the second laser, first video camera and described second are opened using the same frequency device
Video camera, analyzes the particle picture data of shooting on first computer and the second computer respectively, and passes through grain
Subgraph technology draws the synchronous flow field of different section, and carrying out Conjoint Analysis finally by mobile test section obtains three-dimensional flow field
Feature.
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