CN201072403Y - Device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream - Google Patents
Device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream Download PDFInfo
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- CN201072403Y CN201072403Y CNU2007201115135U CN200720111513U CN201072403Y CN 201072403 Y CN201072403 Y CN 201072403Y CN U2007201115135 U CNU2007201115135 U CN U2007201115135U CN 200720111513 U CN200720111513 U CN 200720111513U CN 201072403 Y CN201072403 Y CN 201072403Y
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- 239000002245 particle Substances 0.000 title claims abstract description 48
- 239000007787 solid Substances 0.000 title claims abstract description 10
- 230000000007 visual effect Effects 0.000 claims abstract description 11
- 208000003164 Diplopia Diseases 0.000 claims description 21
- 208000029444 double vision Diseases 0.000 claims description 21
- 230000004907 flux Effects 0.000 abstract description 5
- 238000003909 pattern recognition Methods 0.000 abstract description 3
- 230000001052 transient effect Effects 0.000 abstract description 2
- 230000002123 temporal effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 7
- 238000004422 calculation algorithm Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 238000000917 particle-image velocimetry Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
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Abstract
The utility model discloses a device used for measuring a three-dimensional concentration field and a velocity field of solid particles in dual-phrase distribution of gas and solid. A particle flux transmitting tube is arranged in front of a high speed stereo vision system formed by a double visual angle stereoscope and a high speed video camera. Jet particles are refracted by a mirror face of the double visual angle stereoscope and two particle flux images are obtained from different angles at the same time by a single target face of the high speed video camera. After the images are input into a computer, a particle stereo image is processed by a program module that is composed of a pattern recognition arithmetic program and a three-dimensional reverse projection arithmetic program to get a transient state three-dimensional concentration field of the particles, and a series of microsecond level temporal variation particle images are processed by the program module to get a three-dimensional moving track and the three-dimensional speed field of the particles. A single-camera system is used, which results in being stable and solves complicated structure and poor synchronism of a multiple camera system.
Description
Technical field
The utility model relates to Dual-Phrase Distribution of Gas olid body three-dimensional motion specificity analysis technology, is specifically related to a kind of device of measuring solid particle three-dimensional concentration field, velocity field in the Dual-Phrase Distribution of Gas olid.
Background technology
To the research of Dual-Phrase Distribution of Gas olid is the important and problem in forward position in the turbulent flow research field, at present a main direction of studying for solid grain movement of particles track in the Dual-Phrase Distribution of Gas olid is the two-phase flow measuring technology, and wherein particle image velocimetry PIV technology and DPIV technology are because noncontact measurement of full field, principle are simple, advantage such as realize making things convenient for be subjected to using widely and studying.But above technology generally all adopts sheet laser and single-lens camera chain, can only obtain the two-dimensional projection image of solids three-dimensional motion in the two-phase flow, lack stereoscopic sensation, thereby can only be used for the research of two-dimensional flow field or a certain section particle movement of three-dimensional flow field feature.In order to obtain real three-dimensional motion image, can adopt a plurality of cameras, take from different perspectives, this method problem is that system complex, equipment investment are big, synchronism is difficult to grasp between the different cameral, the multicamera system parameter can't be fixed, and the three-dimensional space motion track that adopting said method is rebuild particle has very big difficulty.
Summary of the invention
The purpose of this utility model is to provide a kind of high speed stereo visual system that uses double vision angle stereoscope and single high-speed camera to form to analyze, measure the method and apparatus of solid particle three-dimensional concentration field, velocity field in the Dual-Phrase Distribution of Gas olid.
The technical scheme that its technical matters that solves the utility model adopts is:
Be divided into two parts of hardware system and software systems, hardware system mainly comprises three parts: be fixed in the preceding double vision angle stereoscope of high-speed camera camera lens, be used for the high-speed camera of images acquired and the background computer that image is handled, described double vision angle stereoscope is placed arrangement as follows by four plate plane catoptrons, i.e. first level crossing, second level crossing, the 3rd level crossing and the 4th level crossing are arranged in order from left to right, first level crossing and second level crossing are arranged in parallel, the 3rd level crossing and the 4th level crossing are arranged in parallel, first level crossing and second level crossing and the 3rd level crossing and the 4th level crossing symmetry are placed, angle between second level crossing and the 3rd level crossing is 90 degree, four plate plane catoptron eyeglasses are fixed on the mirror holder, and double vision angle stereoscope overall fixed is on camera lens; Software systems adopt Visual Studio 6.0 and the exploitation of MATLAB programming software.
Before the particle flux power valve is placed on the high speed stereo visual system of being made up of double vision angle stereoscope and high-speed camera, the jet particle is through the stereoscope minute surface refraction of double vision angle, single high-speed camera target surface can obtain the particle flux image of two different angles simultaneously, behind the image input computing machine, by the program module that algorithm for pattern recognition program and three-dimensional reverse projection algorithm program are formed one width of cloth particle stereo-picture is handled, obtain the transient state three-dimensional concentration field of particle, the a series of microsecond level of program module handles timing variations particle picture obtains particle three-dimensional movement locus and 3D velocity field.
The beneficial effect that the utlity model has is:
Obtain simultaneously on the single high-speed camera target surface two different angles particle picture, to obtain the three-dimensional coordinate of particle in the flow field by particle mode identification technology and reverse projection algorithm be the preferred plan of analyzing Dual-Phrase Distribution of Gas olid.The method has following advantage:
1. use the one camera system to obtain different angles particle movement image simultaneously, overcome the problem of multicamera system complex structure, poor synchronization.
2. one camera system stability, the reconstruction of particle three-dimensional movement locus calculated provides stable parameter.
3. improved the accuracy of identification of corresponding two-phase particle in the different angles image based on the high precision particle algorithm for pattern recognition of inferior pixel match greatly,, can obtain the three-dimensional coordinate of particle in the image by crossing of two reverse projecting planes of different angles.
4. in conjunction with microsecond level sequential changes in coordinates, can analyze and research to 3D velocity field, the concentration field of particle in the two-phase flow.
Description of drawings
Fig. 1 is a high speed stereo visual system structural representation.
Fig. 2 is a double vision angle stereoscope index path.
Fig. 3 is a double vision angle stereoscope structural front view.
Fig. 4 is Fig. 3 upward view.
Fig. 5 is the image processing software system flowchart.
Among the figure: 1, particle flux power valve, 2, double vision angle stereoscope, 3, high-speed camera, 4, plane mirror, 5, plane mirror, 6, plane mirror, 7, plane mirror, 8, camera lens, 9, target surface, 10, mirror holder, 11, double vision angle stereoscope light hole.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the utility model is divided into hardware system and two parts of software systems, hardware system mainly comprises three parts: be fixed in the preceding double vision angle stereoscope 2 of high-speed camera camera lens, be used for the high-speed camera 3 of images acquired and the background computer that image is handled, described double vision angle stereoscope 2 is placed arrangement as follows by four plate plane catoptrons, i.e. first level crossing 4, second level crossing 5, the 3rd level crossing 6 and the 4th level crossing 7 are arranged in order from left to right, first level crossing 4 and second level crossing 5 are arranged in parallel, the 3rd level crossing 6 and the 4th level crossing 7 are arranged in parallel, first level crossing 4 and second level crossing 5 and the 3rd level crossing 6 and the 4th level crossing 7 both symmetries are placed, angle between second level crossing 5 and the 3rd level crossing 6 is 90 degree, four plate plane catoptron eyeglasses are fixed on the mirror holder 10, and double vision angle stereoscope overall fixed is on camera lens; Software systems adopt Visual Studio 6.0 and the exploitation of MATLAB programming software.
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, use stereo visual system and take the particle jet, before double vision angle stereoscope 2 is horizontally fixed on high-speed camera 3 camera lenses.The software systems process flow diagram of high speed stereo visual system as shown in Figure 5.At first use the standard network table images and set up CCD imaging optical path model, obtain CCD optical projection matrix based on the CCD parameter calibration algorithm of MATLAB platform development.Afterwards, use the high speed stereo visual system to take the particle jet, double vision angle stereoscope 2 light paths that the jet particle is formed through four plane mirrors 4,5,6,7 shown in Figure 2, by stereoscopic light hole 11 in the double vision angle on the mirror holder 10 and camera lens 8, to obtain the stereo-picture of two different angles be double vision angle particle movement image in projection on video camera CCD target surface 9, image imports computing machine into, on the basis that obtains CCD optical projection matrix, single-view particle movement image is handled, can be obtained the two dimensional image normalization coordinate of particle.Use is handled double vision angle particle movement image based on the sub-pix algorithm for pattern recognition of VisualStudio 6.0 platform developments, and the three-dimensional footpath that goes out particle in conjunction with the optical projection Model Calculation that has obtained is the depth information of particle in three dimensions deeply.After breath is deeply convinced in the three-dimensional footpath of the two dimensional image normalization coordinate that obtains particle and its, use reverse projection algorithm based on VisualStudio 6.0 platform developments, calculate the particle three-dimensional coordinate.In conjunction with microsecond level particle picture sequence, can rebuild the 3 D motion trace of particle, obtain the 3D velocity field of particle, and the concentration field of particle cluster changes.
Claims (1)
1. measure solid particle three-dimensional concentration field in the Dual-Phrase Distribution of Gas olid for one kind, the device of velocity field, it is characterized in that: be divided into two parts of hardware system and software systems, hardware system mainly comprises three parts: be fixed in the preceding double vision angle stereoscope (2) of high-speed camera camera lens, be used for the high-speed camera (3) of images acquired and the background computer that image is handled, described double vision angle stereoscope (2) is placed arrangement as follows by four plate plane catoptrons, i.e. first level crossing (4), second level crossing (5), the 3rd level crossing (6) and the 4th level crossing (7) are arranged in order from left to right, first level crossing (4) and second level crossing (5) are arranged in parallel, the 3rd level crossing (6) and the 4th level crossing (7) are arranged in parallel, first level crossing (4) and second level crossing (5) are placed with the 3rd level crossing (6) and both symmetries of the 4th level crossing (7), angle between second level crossing (5) and the 3rd level crossing (6) is 90 degree, four plate plane catoptron eyeglasses are fixed on the mirror holder (10), and double vision angle stereoscope overall fixed is on camera lens; Software systems adopt Visual Studio 6.0 and the exploitation of MATLAB programming software.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201115135U CN201072403Y (en) | 2007-07-03 | 2007-07-03 | Device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201115135U CN201072403Y (en) | 2007-07-03 | 2007-07-03 | Device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream |
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| CN201072403Y true CN201072403Y (en) | 2008-06-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620904A (en) * | 2012-03-27 | 2012-08-01 | 中国矿业大学 | Experimental device for flow field display |
| CN103197095A (en) * | 2013-04-08 | 2013-07-10 | 天津大学 | Lamination synchronous three-dimensional particle picture speed measuring method and device |
| CN103791891A (en) * | 2014-03-07 | 2014-05-14 | 福州大学 | Device and method for testing electric appliance three-dimensional dynamic characteristics based on one camera |
| CN105264340A (en) * | 2013-06-08 | 2016-01-20 | 德尔格安全股份两合公司 | Reaction support, measuring method and measuring method for determining gas and particle concentrations, and optical flow sensor |
| CN107091796A (en) * | 2017-06-14 | 2017-08-25 | 中央民族大学 | The optical system that across particle diameter size granule level is matched somebody with somebody and its is distributed in a kind of measurement pipe stream |
-
2007
- 2007-07-03 CN CNU2007201115135U patent/CN201072403Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620904A (en) * | 2012-03-27 | 2012-08-01 | 中国矿业大学 | Experimental device for flow field display |
| CN102620904B (en) * | 2012-03-27 | 2014-08-20 | 中国矿业大学 | Experimental device for flow field display |
| CN103197095A (en) * | 2013-04-08 | 2013-07-10 | 天津大学 | Lamination synchronous three-dimensional particle picture speed measuring method and device |
| CN103197095B (en) * | 2013-04-08 | 2015-08-12 | 天津大学 | Hierarchical synchronization three dimensional particles image speed measurement method and apparatus |
| CN105264340A (en) * | 2013-06-08 | 2016-01-20 | 德尔格安全股份两合公司 | Reaction support, measuring method and measuring method for determining gas and particle concentrations, and optical flow sensor |
| CN105264340B (en) * | 2013-06-08 | 2018-06-29 | 德尔格安全股份两合公司 | Reaction pedestal, for determining the measuring system of gas and granule density and measuring method and optical flow-sensint unit |
| CN103791891A (en) * | 2014-03-07 | 2014-05-14 | 福州大学 | Device and method for testing electric appliance three-dimensional dynamic characteristics based on one camera |
| CN103791891B (en) * | 2014-03-07 | 2015-11-18 | 福州大学 | A kind of electrical equipment Three-Dimensional Dynamic characteristic test device based on one camera and method |
| CN107091796A (en) * | 2017-06-14 | 2017-08-25 | 中央民族大学 | The optical system that across particle diameter size granule level is matched somebody with somebody and its is distributed in a kind of measurement pipe stream |
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Granted publication date: 20080611 Termination date: 20120703 |