CN202256377U - Single-camera three-dimensional stereo particle picture speed measuring system - Google Patents
Single-camera three-dimensional stereo particle picture speed measuring system Download PDFInfo
- Publication number
- CN202256377U CN202256377U CN2011203645768U CN201120364576U CN202256377U CN 202256377 U CN202256377 U CN 202256377U CN 2011203645768 U CN2011203645768 U CN 2011203645768U CN 201120364576 U CN201120364576 U CN 201120364576U CN 202256377 U CN202256377 U CN 202256377U
- Authority
- CN
- China
- Prior art keywords
- camera
- dimensional
- light source
- digital camera
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
A single-camera three-dimensional stereo particle picture speed measuring system comprises an optical system, a data sampling system and a data processing system. The optical system and the data sampling system form an experiment measuring platform. The optical system comprises a body light source adjusting optical portion, a laser generator, a multi-faceted special-effect prism which is also named multi-image mirror and a laser body. The laser generator is a system light source and adopts semiconductor continuous laser. The body light source adjusting optical portion is a group of lens combination arranged on a light path of the laser generator. The multi-faceted special-effect prism is a key part to achieve the effect of single camera three-dimensional imaging and is arranged on a light path between a digital camera and a measuring flow field. The data sampling system comprises a signal synchronizer, the digital camera, a microcomputer and a plane target. Particle imaging in the flow field in different angles can be achieved through a single camera, and three-dimensional location and tracking can be conducted on particles according to particles in different views to obtain a three-dimensional speed field in a three-dimensional space body.
Description
(1) technical field
The utility model relates to the stereoscopic particle image velocimetry of a kind of one camera three-dimensional system, belongs to the velocity measuring technique field of flowing.
(2) background technology
Particle image velocimetry (Particle Image Velocimetry is called for short PIV) is a kind of modern laser velocimeter technology, mainly applies to flow field velocity and measures.Obtain the flow field velocity field through following the trail of the motion of trace particle in the flow field.Traditional P IV technology uses a thickness to illuminate the particle in the flow field at the laser light sheet below 1 millimeter; Through single camera the position of particle in very short time followed the trail of, realize the two-dimension speed field measurement (representing with 2D2C usually) in the two dimensional surface.
Up-to-date three-dimensional stereoscopic PIV technology; Employing thickness is that the laser body light source of ten to tens millimeters thick illuminates the particle in the flow field; Carry out three-dimensional localization and tracking through a plurality of cameras (at least three) from the trace particle in the stream field of different visual angles, realize accurate measurement (representing with 3D3C usually) the 3D velocity field in the three dimensions.This new three-dimensional stereoscopic PIV technology can not only measure the 3D velocity field in the three dimensions, and can obtain velocity gradient tensor complete in the three dimensions.This makes becomes possibility through the vortex structure in the Research on experimental methods three-dimensional flow field, and therefore three-dimensional stereoscopic PIV technology has boundless application prospect in fields such as Aero-Space, the energy, chemical industry and medical treatment.
Yet present three-dimensional stereoscopic PIV technology also is in the full-fledged stage, also has a lot of concrete problems need go to solve in application facet.Wherein distinct issues are that experiment porch is relatively complicated the most.It is very complicated that set up and the synchro control of a plurality of cameras makes that experimentation becomes, also very high to the experiment manipulation request, is unfavorable for applying of this technology.If can adopt the simple relatively perhaps higher experimental facilities of integration to realize three-dimensional stereoscopic PIV technology, that will play great impetus to this The Application of Technology.The utility model has proposed the stereoscopic particle image velocimetry of a kind of one camera three-dimensional system just in view of this consideration.
(3) summary of the invention
The purpose of the utility model provides the stereoscopic particle image velocimetry of a kind of one camera three-dimensional system; Promptly set up an one camera and realize the experimental system of three-dimensional stereoscopic PIV technology; Through single camera three dimensional particles is formed images; Carry out particle and follow the trail of the 3D velocity field that obtains in the three dimensions body, promptly measure the velocity field in flow field 1.Here measure flow field 1 and be the flow region that is studied in the fluid mechanics field; To solve in the three-dimensional stereoscopic PIV technology, set up and the synchro control of a plurality of cameras makes experimentation very complicated, and be very high to the experiment manipulation request, is unfavorable for problems such as applying of this technology.
The three-dimensional stereoscopic particle image velocimetry system of a kind of one camera of the utility model (being called for short the stereoscopic PIV of one camera three-dimensional system), it comprises optical system, sampled-data system and data handling system three parts.Wherein optical system and sampled-data system have constituted the experiment measuring platform.
1. optical system
Optical system comprises: the body light source is regulated optic 2, laser generator 3, many faceted pebbles special efficacy prism 5 (claiming multi-picture mirror again) and laser body light source 9;
This laser generator 3 is the light source of the utility model PIV system; Be generally continuity laser or double-pulse laser, this optical system adopts 8 watts of green glow semiconductor continuous lasers, wavelength 532 nanometers; The output diameter is 5 millimeters column sources, the SM-SEMI-8W model that can select for use radium intelligence prestige company to produce.
It is one group of combination of lenses that this body light source is regulated optic 2, comprising two lump cokes apart from being that 500 millimeters convex lens, two lump cokes are apart from being respectively-75 and-100 millimeters concavees lens and two lump cokes apart from the plano-convex cylindrical mirror that is all 60 millimeters.The body light source is regulated optic 2 and is positioned on the light path of laser generator 3, has been extended to certain thickness laser body light source 9 (thickness is generally ten to tens millimeters) in order to the laser column source that laser generator 3 is penetrated.
This many faceted pebbles special efficacy prism 5 is the critical optical components that realize the one camera three-dimensional imaging, is positioned over digital camera 6 and measures on the light path between the flow field 1,62 millimeters Multivision 3F prisms can selecting for use Japanese HOYA company to produce.
2. sampled-data system
Sampled-data system comprises: signal Synchronization device 4, digital camera 6, microcomputer 7 and plane target 8; In sampled-data system, the connected mode of each parts is: microcomputer 7 adopts the usb data line to be connected with signal Synchronization device 4; Digital camera 6 passes through the IMAQ card connection with microcomputer 7; Signal Synchronization device 4 adopts the BNC signal wire to be connected with digital camera 6; Laser generator 3 adopts the BNC signal wire to be connected with model synchronizer 4.
The control flow of data sampling is: microcomputer 7 utilizes image capture software that control signal is transferred to signal Synchronization device 4 through the usb data line.Synchronizer is realized the exposure of digital camera 6 and the laser radiation of laser generator 3 synchronously after receiving control signal.After digital camera 6 is accomplished the exposure data collection, the data transmission of particle imaging is also stored to microcomputer 7.
This signal Synchronization device 4 is a system controller spare, can select 8 passage MicroPulse, 725 signal Synchronization devices for use, and main responsible control laser generator 3 is synchronous with digital camera 6.
This digital camera 6 is CCD or CMOS industrial camera, can select for use on request; The utility model is selected BOBCAT series camera ICL-B0620 for use, and resolution is 640 * 480 pixels, and the highest SF is 260 hertz, and 45 millimeters camera lenses of configuration Nikon.
This microcomputer 7 is a mini-computer, and the Z400 of Hewlett-Packard workstation is adopted in this test, and basic configuration is: Intel Core2 central processing unit; The 16GB internal memory, 1TB hard disk, NVIDIA 420 independent video cards; 20 cun LCD displays, WinXP Pro64 bit manipulation system.Microcomputer 7 is equipped with the CamLink interface high speed image acquisition board of EPIX company, directly connects digital camera 6 and accepts view data and preservation.Digital camera 6 and microcomputer 7 both control and IMAQ are realized through selecting existing P IV system software MicroVec 3.3.1 for use.
This plane target 8 is fixed in the body that can realize stereoscopic PIV in thousand minutes on the appearance and demarcates for the test the speed common target of usefulness of PIV.This plane target 8 is used for the body timing signal and is positioned in the measurement flow field 1, realizes that plane target 8 moves in the traversal of measuring on 1 thickness direction of flow field.
The implementation step of data sampling is:
(1) form measurement flow field 1, and selected measured zone;
(2) laser generator 3, signal Synchronization device 4 and microcomputer 7 are linked to each other, make microcomputer 7 can control the irradiation of laser generator 3.Regulate laser generator 3 and regulate optic 2 with the body light source, the organizator light source also shines measured zone;
(3) connect digital camera 6, signal Synchronization device 4 and microcomputer 7, make the exposure that microcomputer 7 can control figure cameras 6;
(4) in measuring flow field 1, throw in an amount of trace particle; At digital camera 6 with measure and to place many faceted pebbles special efficacy prism 5 between the flow field 1, cooperate the irradiation of laser generator 3, regulate the position of many faceted pebbles special efficacy prism 5 and the focal length of digital camera 6, make to form particle imaging clearly on the digital camera 6;
(5) will be fixed on the target imaging that the plane target 8 on the appearance was put into the measured zone perfect aspect demarcation of measuring flow field 1 in thousand minutes;
(6) from measure flow field 1, take out the data sampling that experimentizes behind the plane target 8.Data sampling divides following step again here:
A) start measurement flow field 1, form and flow;
B) open the laser generator 3, signal Synchronization device 4, digital camera 6 and the microcomputer 7 that have connected and carry out the flow field particle imaging;
C) record flow field in particle imaging and with data storage in microcomputer 7.
3. data handling system
Data handling system is the three-dimensional stereoscopic PIV data processing software of the applicant's exploitation, and the method step of its data processing is:
(1) the target image that one camera is formed is cut apart the one-tenth image that obtains each visual angle, and the punctuate in the image is discerned, and accomplishes the demarcation of three-dimensional measurement intracorporeal space coordinate;
(2) the three dimensional particles image that one camera is formed is cut apart acquisition each flow field, visual angle particle imaging figure, and particle imaging is carried out pre-treatment, the particle coordinate in the identification two-dimensional imaging plane;
(3) according to the particle coordinate in the two-dimensional imaging plane at calibration function and each visual angle, find the solution calibration function through the Levenberg-Marquardt algorithm and obtain the three dimensional particles volume coordinate, accomplish the location of particle space distribution in the flow field;
(4) the three dimensional particles space distribution is projected to three-dimensional gray matrix, realize the space intensity profile in the three-dimensional matrice;
(5) utilize the three-dimensional gray matrix of adjacent two time steps to carry out the analysis of body simple crosscorrelation, understand particle's velocity in the measuring body, thereby obtain the velocity field in the three-dimensional measurement body;
(6) velocity field is carried out aftertreatment, reject the bad velocity that the failure of body cross-correlation analysis obtains, and stream field shows.
Wherein in the analysis of the body simple crosscorrelation described in the step 5, its formula is following:
R in the formula
12Represent cross correlation function, I represents gray matrix, and σ represents variance, adjacent two time steps of following table 1,2 representative, i, j, k gray matrix coordinated indexing, n
x, n
y, n
zRepresent gray matrix at x, y, the size on the z direction.
The effect and the advantage of the stereoscopic PIV of the utility model one camera three-dimensional system are:
(1) through being positioned over the special efficacy imaging of measuring the many faceted pebbles special efficacy prism 5 between flow field 1 and the digital camera 6, can form the imaging of particle in the different visual angles Fluid field through single camera.Particle imaging according to different visual angles can carry out three-dimensional localization and tracking to particle, finally measures the 3D velocity field in the three dimensions body;
(2) regulate the adjusting of spacing between the lens in the optic 2 through the body light source, thickness that can free adjustment laser body light source satisfies different requirement of experiment;
(3) the experiment imaging moiety has only prism of faceted pebble special efficacy more than 5 and individual digit camera 6 to form, and simplifies the pattern that existing three-dimensional stereoscopic PIV measuring system adopts a plurality of (three or more than) camera imaging greatly, is convenient to applying of three-dimensional stereoscopic PIV technology;
(4) position between fixing many faceted pebbles special efficacy prism 5 and the digital camera 6 and distance (both are fixed on the same rigidity experiment porch); Only need do body space and demarcate and just can move experiment porch arbitrarily and be applied to the actual flow field measurement, the three-dimensional stereoscopic PIV technology of the existing complicacy of these characteristics has very large advantage.
(4) description of drawings
Fig. 1 is the three-dimensional stereoscopic PIV overall system synoptic diagram of one camera;
Fig. 2 a is that the body light source is regulated the optic side view;
Fig. 2 b is that the body light source is regulated the optic vertical view;
Fig. 3 is each space of parts location drawing of flow field imaging;
Fig. 4 is imaging device synoptic diagram and imaging effect figure;
Fig. 5 is flow chart of data processing figure;
Fig. 6 is an actual measurement flow field velocity polar plot;
Symbol among the figure:
1-tests the flow field; 2-body light source is regulated optic; The 3-laser generator;
4-signal Synchronization device; Many faceted pebbles of 5-special efficacy prism; The 6-digital camera;
The 7-microcomputer; 8-plane target; 9-laser body light source;
The 10-water vat; The 11-pipe;
The a-convex lens; The b-convex lens; The c-concavees lens;
The d-concavees lens; E-plano-convex cylindrical mirror; F-plano-convex cylindrical mirror;
(5) practical implementation method
The stereoscopic PIV of this one camera three-dimensional system mainly is divided into optical system, sampled-data system and data handling system three sub-systems.Wherein optical system and sampled-data system are hardware system, formed the platform of experiment measuring, and data handling system are software systems.
As shown in Figure 1, experimental subjects selects for use jet as the actual measurement flow field for measuring flow field 1, realizes the measurement of jet collar vortex through the stereoscopic PIV of this one camera three-dimensional system.The experiment hardware system that optical system and sampled-data system are formed comprises 8 major parts altogether: it is light sources with laser generator 3 that the body light source is regulated optic 2, mainly is to be used to generate laser body light source 9 to illuminate the test zone of measuring flow field 1.Laser generator 3 can be selected 8 watts of green glow semiconductor continuous lasers of the radium intelligence prestige SM-SEMI-8W of company model for use, wavelength 532 nanometers, and the output diameter is 5 millimeters column sources.Regulate the body light source that optic 2 is extended to laser column source 15 millimeters thick through the body light source.The optical lens that the body light source is regulated in the optic 2 makes up shown in Fig. 2 a and Fig. 2 b, and wherein black arrow is represented the laser incident direction; It is 500 millimeters convex lens that lens a adopts identical focal length with b, plays the effect of calibration laser column source; Lens c and d are respectively focal length-75 millimeter and-100 millimeters concavees lens, play the effect of expansion of laser light light beam diameter; Lens e and f are that focal length is all 60 millimeters plano-convex cylindrical mirror, play the collimation on the calibration laser column source horizontal direction.Change the body light source and regulate the distance between each optical lens in the optic 2, can change the thickness of laser body light source 9, range of adjustment is between ten to tens millimeters.Signal Synchronization device 4 can be selected 8 passage MicroPulse, the 725 signal Synchronization devices of Beijing cube world company limited for use.Many faceted pebbles special efficacy prism 5 can be selected Japanese 62 millimeters Multivision 3F of HOYA company prism for use.Digital camera 6 can be selected the BOBCAT series camera ICL-B0620 of IMPERX company for use, and resolution is 640 * 480 pixels, and the highest SF is 260 hertz, 45 millimeters camera lenses of configuration Nikon.The control signal of digital camera 6 is from signal Synchronization device 4.Microcomputer 7 can be selected general microcomputer at present for use, and the Z400 of Hewlett-Packard workstation is adopted in this test, and basic configuration is: Intel Core2 central processing unit; The 16GB internal memory, 1TB hard disk, NVIDIA 420 independent video cards; The 20LCD display, WinXP Pro64 bit manipulation system.Microcomputer 7 is equipped with the CamLink interface high speed image acquisition board of EPIX company, directly connects digital camera 6 and accepts view data and preservation.The control of experimental part and IMAQ, the PIV system software MicroVec 3.3.1 through cube world, Beijing realizes.Plane target 8 is to be fixed on thousand fens common PIV on the appearance base to test the speed and use target.Regulate moving of thousand fens appearance bases, can realize that the traversal of flow field survey body thickness direction accomplishes the body staking-out work of three-dimensional stereoscopic PIV.
The key step that the stereoscopic PIV experimental data of one camera is gathered is following:
(1) form measurement flow field 1, and selected measured zone.As shown in Figure 3, this thermometrically be the solid jet of 2 millimeters pipes 11 in the aqueous mediums in the water vat 10.Jet exit velocity is about 12 mm/second, measures the flow field and is positioned at 5 millimeters places, jet pipe 11 outlet downstream, and measured zone is the high generous flow field that is respectively 8.5,10.5 and 12 millimeters.Measure 40 millimeters of flow field 1 dried up cylinder 10 walls.
(2) connect main experimental facilities: laser generator 3 is connected through the BNC data line with signal Synchronization device 4; Digital camera 6 is connected through the BNC data line with signal Synchronization device 4; Digital camera 6 links to each other through the CamLink data line with microcomputer 7.
(3) through 3 irradiations of microcomputer 7 control laser generators.The laser body light source 9 of 15 millimeters thick is realized in the position of each optical lens in the control agent light source adjusting optic 2, and the stream field measured zone is shone.
(4) in measuring flow field 1, throw in an amount of trace particle.Between digital camera 6 and measurement flow field 1, place many faceted pebbles special efficacy prism 5.Many faceted pebbles special efficacy prism 5 dried up cylinder 11 outside wall surface and digital camera 6 are respectively 80 millimeters and 350 millimeters (as shown in Figure 3).Synchro control laser generator 3 and digital camera 6, and the focal length (aperture is made as 8) of adjusting digital camera 6 make it to form particle imaging clearly.As shown in Figure 4, the imaging through the measurement flow field 1 after many faceted pebbles special efficacy prism 5 has three zones, and this is owing to adopted the cause of the special efficacy prism of HOYA three faceted pebbles.For the ease of showing imaging effect, Fig. 4 has specially strengthened the background light intensity when imaging, make pipe 11 form stronger background in the drawings.The as can be seen from the figure various visual angles three-dimensional imaging effect of pipe 11.And actual tests is when measuring, have only in the measured zone 1 particle by 9 irradiations of laser body light source form clearly as, pipe 11 does not form images in image.
(5) will be fixed on thousand fens plane targets 8 on the appearance and put into the target imaging that the body demarcation is carried out in measurement flow field 1.Regulate thousand fens appearance and advance, make target 8 traversals in plane measure flow field 1 thickness direction towards a direction.On thickness direction, choose 7 positions and carry out the imaging of plane target 8, and preserve data.
(6) from measure flow field 1, take out the data sampling that experimentizes behind the plane target 8.Start earlier and measure flow field 1, form and flow, open the laser generator 3, signal Synchronization device 4, digital camera 6 and the microcomputer 7 that have connected then and carry out the flow field particle imaging, write down in the flow field particle imaging at last and with data storage in microcomputer 7.Laser generator 3 adopts the continuous mode operation when wherein testing, and digital camera adopts continuously equidistantly exposure mode, and each time shutter is 3 milliseconds, and frequency is 200 hertz.
So far, the experimental data sampling element is accomplished.
The data that experiment collects after accomplishing are handled the velocity field that obtains measured zone through microcomputer 7.Data processing can adopt the three-dimensional stereoscopic PIV data processing software of standard, and the three-dimensional stereoscopic PIV data processing software that this test adopts fluid mechanics research institute of BJ University of Aeronautics & Astronautics to develop voluntarily.
The main flow process of the stereoscopic PIV Data Processing in Experiment of one camera is (Fig. 5) as follows:
(1) the body uncalibrated image and the three-dimensional stereoscopic PIV particle picture of target are cut apart, formed the separate imaging in each visual angle, be about among Fig. 4 right-of-center in political views figure each visual angle imaging region and cut apart and save as a picture separately.
(2) the body calibration maps after will cutting apart calculates the body mapping function, and judges the precision of body mapping function.If the precision of mapping function does not meet the demands, promptly the error mean square difference of each punctuate identification is greater than half-pixel, and the body of then reforming is demarcated and satisfied accuracy requirement until mapping function.
(3) particle imaging after cutting apart is carried out the image pre-treatment and improve image effect, can adopt Gauss's low frequency filtering of 3 * 3 usually.The clear identification single particle of ability is thought that then image satisfies imaging requirements, and is carried out the identification of single particle in the two-dimentional particle picture after the image pre-treatment.
(4) the two dimensional image particle and the body demarcation mapping function that identification are obtained carry out finding the solution of Levenberg-Marquardt algorithm, obtain the three dimensional particles volume coordinate, accomplish the location of particle space distribution in the flow field.The result of three dimensional particles location can carry out the demonstration of three dimensional particles field.
(5) the three dimensional particles space distribution is projected to three-dimensional gray matrix, realize the space intensity profile in the three-dimensional matrice, particle diameter usually calculates by 7 individualities.
(6) particle's velocity in the measuring body is understood in the analysis that utilizes the three-dimensional gray matrix of adjacent two time steps to carry out the body simple crosscorrelation, thereby obtains the velocity field of three-dimensional measurement flow field 1 inner structureization.
(7) velocity field is carried out aftertreatment, reject the bad velocity that the failure of body cross-correlation analysis obtains.The velocity field that obtains is a The ultimate results, can be used for the demonstration and the analysis in flow field.
It is as shown in Figure 6 to obtain velocity field after measured data is handled, and wherein the negative direction of z is a jet direction; The velocity spacing all is 0.96 millimeter on all directions; What streamline showed is to flow in the zone, jet-core region; Xsect is positioned at measures jet direction 60% position, 1 thickness direction upper edge, flow field; Isoline has been represented the distribution of flowing velocity size projection amount size on xsect, and light expression speed is little, and dark expression speed is big.
Claims (6)
1. the three-dimensional stereoscopic particle image velocimetry of one camera system, it comprises optical system, sampled-data system and data handling system three parts; Optical system and sampled-data system have constituted the experiment measuring platform; It is characterized in that:
Described optical system comprises that body light source adjusting optic (2), laser generator (3), many faceted pebbles special efficacy prism are multi-picture mirror (5) and laser body light source (9); This laser generator (3) is the light source of system, adopts the semiconductor continuous laser; It is one group of combination of lenses that this body light source is regulated optic (2), is positioned on the light path of laser generator (3); This many faceted pebbles special efficacy prism (5) is positioned over digital camera (6) and measures on the light path between the flow field (1);
Described sampled-data system comprises signal Synchronization device (4), digital camera (6), microcomputer (7) and plane target (8); The connected mode of each parts is: microcomputer (7) adopts the usb data line to be connected with signal Synchronization device (4); Digital camera (6) and microcomputer (7) are through the IMAQ card connection; Signal Synchronization device (4) adopts the BNC signal wire to be connected with digital camera (6); Laser generator (3) adopts the BNC signal wire to be connected with model synchronizer (4); This signal Synchronization device (4) is selected 8 passage MicroPulse, 725 signal Synchronization devices for use; This digital camera (6) is CCD or CMOS industrial camera, selects for use on request; This microcomputer (7) is a mini-computer, and high speed image acquisition board is housed, and directly connects digital camera (6); This plane target (8) is used for the body timing signal and is positioned in the measurement flow field (1).
2. the stereoscopic particle image velocimetry of a kind of one camera three-dimensional according to claim 1 system, it is characterized in that: the semiconductor continuous laser that this optical system adopts is 8 watts of green glow semiconductor continuous lasers, wavelength 532 nanometers, the output diameter is 5 millimeters column sources.
3. the stereoscopic particle image velocimetry of a kind of one camera three-dimensional according to claim 1 system; It is characterized in that: described body light source is regulated optic (2), and its combination of lenses comprises that two lump cokes are apart from being that 500 millimeters convex lens, two lump cokes are apart from being respectively-75 and-100 millimeters concavees lens and two lump cokes apart from the plano-convex cylindrical mirror that is all 60 millimeters.
4. the stereoscopic particle image velocimetry of a kind of one camera three-dimensional according to claim 1 system, it is characterized in that: described laser body light source (9), its thickness are ten to 50 millimeters.
5. the stereoscopic particle image velocimetry of a kind of one camera three-dimensional according to claim 1 system; It is characterized in that: described digital camera (6) is selected BOBCAT series camera ICL-B0620 for use; Resolution is the 640x480 pixel, and the highest SF is 260 hertz, and 45 millimeters camera lenses of configuration Nikon.
6. the stereoscopic particle image velocimetry of a kind of one camera three-dimensional according to claim 1 system; It is characterized in that: this microcomputer (7) adopts the Z400 of Hewlett-Packard workstation, is configured to: Intel Core2 central processing unit, 16GB internal memory; The 1TB hard disk; NVIDIA 420 independent video cards, 20 cun LCD displays, WinXP Pro 64 bit manipulation systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203645768U CN202256377U (en) | 2011-09-27 | 2011-09-27 | Single-camera three-dimensional stereo particle picture speed measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203645768U CN202256377U (en) | 2011-09-27 | 2011-09-27 | Single-camera three-dimensional stereo particle picture speed measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256377U true CN202256377U (en) | 2012-05-30 |
Family
ID=46117596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203645768U Expired - Fee Related CN202256377U (en) | 2011-09-27 | 2011-09-27 | Single-camera three-dimensional stereo particle picture speed measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256377U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749475A (en) * | 2012-07-26 | 2012-10-24 | 中国航空工业集团公司沈阳发动机设计研究所 | Single CCD (charge coupled device) camera three-dimensional particle image velocity measuring method |
| CN103175760A (en) * | 2013-02-06 | 2013-06-26 | 清华大学 | System and method for observing micro-nano air bubbles in water body |
| CN109946478A (en) * | 2019-03-24 | 2019-06-28 | 北京工业大学 | A kind of detection system for the Aerostatic Spindle internal gas flow velocity |
| CN112378615A (en) * | 2020-11-02 | 2021-02-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Off-axis focusing device for 2D-3C PIV test |
| US11320449B2 (en) | 2019-11-01 | 2022-05-03 | Industrial Technology Research Institute | Visualization device and observation method for flow field |
-
2011
- 2011-09-27 CN CN2011203645768U patent/CN202256377U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749475A (en) * | 2012-07-26 | 2012-10-24 | 中国航空工业集团公司沈阳发动机设计研究所 | Single CCD (charge coupled device) camera three-dimensional particle image velocity measuring method |
| CN102749475B (en) * | 2012-07-26 | 2014-08-20 | 中国航空工业集团公司沈阳发动机设计研究所 | Single CCD (charge coupled device) camera three-dimensional particle image velocity measuring method |
| CN103175760A (en) * | 2013-02-06 | 2013-06-26 | 清华大学 | System and method for observing micro-nano air bubbles in water body |
| CN103175760B (en) * | 2013-02-06 | 2015-12-09 | 清华大学 | Micro-nano air-bubble observation system and method in water body |
| CN109946478A (en) * | 2019-03-24 | 2019-06-28 | 北京工业大学 | A kind of detection system for the Aerostatic Spindle internal gas flow velocity |
| US11320449B2 (en) | 2019-11-01 | 2022-05-03 | Industrial Technology Research Institute | Visualization device and observation method for flow field |
| CN112378615A (en) * | 2020-11-02 | 2021-02-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Off-axis focusing device for 2D-3C PIV test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102435770B (en) | Three-dimensional stereo particle image speed-measuring system for single camera | |
| CN106908622B (en) | A kind of chromatography PIV measuring device and method based on optical field imaging | |
| CN108828606B (en) | One kind being based on laser radar and binocular Visible Light Camera union measuring method | |
| CN101082561B (en) | Method and device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream | |
| Willert | Stereoscopic digital particle image velocimetry for application in wind tunnel flows | |
| Maas et al. | Particle tracking velocimetry in three-dimensional flows: Part 1. Photogrammetric determination of particle coordinates | |
| CN206541029U (en) | Based on the coaxial three anti-four wave beam laser three-dimensional imaging systems without burnt telescope | |
| CN202256377U (en) | Single-camera three-dimensional stereo particle picture speed measuring system | |
| CN103197095B (en) | Hierarchical synchronization three dimensional particles image speed measurement method and apparatus | |
| CN104019763B (en) | Fluid 3D velocity field and the synchronous measuring apparatus of deformable body three-dimensional appearance | |
| CN109544679A (en) | The three-dimensional rebuilding method of inner wall of the pipe | |
| US9961328B2 (en) | Method of and apparatus for optically determining positions and orientations of mirrors | |
| CN105115445A (en) | Three-dimensional imaging system and imaging method based on combination of depth camera and binocular vision | |
| CN108802043A (en) | Tunnel detector, detecting system and tunnel defect information extracting method | |
| CN102435411A (en) | Full field measuring system and method of reynolds stress of compressible turbulent flow | |
| CN103308715A (en) | Low power consumption particle picture velocity measurement system based on bicolor laser scanning technique | |
| CN105890544A (en) | Underwater stationary and high-speed moving target three-dimensional imaging method and system | |
| CN107014293A (en) | A kind of photogrammetric survey method of camera scanning imaging | |
| CN104296681B (en) | Dimensional topography method for sensing based on laser dot-matrix mark | |
| CN201072403Y (en) | Device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream | |
| Grant et al. | The application of an in-line, stereoscopic, PIV system to 3-component velocity measurements | |
| CN105387818A (en) | Large-scale three-dimensional shape measurement method based on one-dimensional image sequence | |
| TWM552589U (en) | Laser rangefinder with full-section scanning | |
| CN104236695A (en) | Dynamic system multi-physics field imaging detection system | |
| CN103697825B (en) | System and method of utilizing super-resolution 3D (three-dimensional) laser to measure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130927 |