CN106932398A - A kind of shadowgraph imaging system for the spraying measurement of many spray orifices - Google Patents
A kind of shadowgraph imaging system for the spraying measurement of many spray orifices Download PDFInfo
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- CN106932398A CN106932398A CN201710146300.4A CN201710146300A CN106932398A CN 106932398 A CN106932398 A CN 106932398A CN 201710146300 A CN201710146300 A CN 201710146300A CN 106932398 A CN106932398 A CN 106932398A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B39/00—High-speed photography
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- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
A kind of visualization measurement field the invention belongs to be based on shadowing method imaging, and in particular to shadowgraph imaging system for the spraying measurement of many spray orifices.A kind of shadowgraph imaging system for the spraying measurement of many spray orifices；Light is exposed in combustion chamber through half-reflecting half mirror, is reflected through half-reflecting half mirror, and focusing mirror is exposed to perpendicular to former direction, and line focus speculum converges the reflection with the second level crossing, eventually enters into high-speed photography camera, and storage image file in a computer.By by multidirectional injector positioned on visualization window just to wall on, and mirror surface treatment is carried out to wall inwall of the combustion chamber equipped with fuel injector, with reference to the set direction of half-reflecting half mirror printing opacity, half-reflecting half mirror is put with horizontal direction in 45 °, multi beam spraying such that it is able to spray fuel injector carries out positive observation, therefore multidirectional injector is can apply to, reaches the purpose that observation simultaneously is carried out to the spraying of many spray orifices.
Description
Technical field
Visualization measurement field the invention belongs to be based on shadowing method imaging, and in particular to one kind is sprayed for many spray orifices and surveyed
The shadowgraph imaging system of amount.
Background technology
Diesel Spray Characteristics have important influence to the economy of diesel engine and discharge, therefore diesel spray grinds
Study carefully be diesel combustion research in a very active field.As the light of traditional Spray penetration distance and spray cone angle etc.
Method of testing is learned, existing shadow testing system there are reflective and two kinds of conventional light path arrangements of transmission-type.In transmission-type light path system
In system, light source, lens, combustion chamber, high-speed photography camera on the same line, become after the collimated lens of light sent from light source
Be parallel rays, through tested flow field, then line focus lens after enter high-speed photography camera.In reflection type optical path system, light
Source, level crossing, collimating mirror, combustion chamber, focusing mirror, level crossing, high-speed photography camera arrange that light source is sent out in Z-shaped
The light of injection reflexes to collimating mirror by level crossing, and parallel rays is changed into after collimated speculum, through after tested flow field
Focusing mirror convergence is propagated to, the light after convergence is reflected into high-speed photography camera through level crossing.The same conduct of schlieren method
Traditional spraying optical test method, and shadowing method is distinguished less in light path arrangement, and slit is only with the addition of after light source, is used
To make spot light, and the edge of a knife is with the addition of before screen is imaged, for cutting optical path.Existing shadowing method and schlieren method
Test system in, combustion chamber carry relative both sides visualization window, fuel injector positioned on combustion chamber top, the light that light source sends
Line passes through tested flow field after being changed into parallel rays through lens, then high-speed camera camera is injected into after lens.
Such as the paper of Rong Meixia《Diesel spray and fire behaviour experimental study》The measurement spray ignition characteristic of middle proposition
High speed shadow photography experimental rig, constant volume combustion bomb has the relative visualization quartz window in two sides, and sprayer is positioned on firebomb top,
The light that halogen lamp light source is projected is reflected by two sheets of mirrors, and tested flow field is penetrated perpendicular to quartz window, then through two sheets of mirrors
Reflection, into high-speed motion picture camera, so as to obtain the shadow image of spraying.For another example the paper of Luo Li《It is acidified the spray of oil biodiesel
Mist and combustion characteristics research》The high-speed schlieren photograph system of the research Spray Characteristics of Bio-Diesel Oil of middle proposition, constant volume combustion bomb has
Double-side visible quartz window, fuel injector becomes positioned on firebomb top, the light that light source sends by the reflection of speculum and collimating mirror
It is that collimated light beam enters tested flow field, through after flow field, then high-speed motion picture camera is reflected into through schlieren mirror and speculum, so that
The schlieren image sprayed.
But the shadowing systems and schlieren system of above-mentioned measurement spraying, are all to the fuel injector spray at the top of combustion chamber
The spraying penetrated carries out side observation, therefore is only used for the measurement that single spraying hole is sprayed, when being sprayed using multiple orifice nozzle, system
The spraying for observing occurs the phenomenon for overlapping or covering, and causes observed result unintelligible.Therefore, traditional shade and schlieren
System is not particularly suited for the observation of many spray orifice sprayings.And used in actual diesel engine is all multidirectional injector, many spray orifices
The spray characteristics that fuel injector is formed are the basic factors for determining diesel engine performance, so needing the visualization measurement of many spray orifice sprayings
Method and system provides more accurately and effectively research technique for the research of diesel spray characteristic, supports Diesel Engine Optimizing.
The content of the invention
Shadowgraph imaging system it is an object of the invention to be directed to existing spraying measurement can only observe lacking for single hole spraying
A kind of point, it is proposed that shadowing method imaging system of many spray orifice sprayings of measurement.
The object of the present invention is achieved like this：
A kind of shadowgraph imaging system for the spraying measurement of many spray orifices, including light source, for exporting optical signal；And along institute
State the first level crossing, collimating mirror, half-reflecting half mirror, combustion chamber that light source output optical signal path is sequentially arranged, focus on it is anti-
Penetrate mirror, the second level crossing, high-speed photography camera, computer；The light that light source sends is irradiated to standard after being reflected through the first level crossing
Straight speculum, becomes parallel rays after collimated speculum, light is exposed in combustion chamber through half-reflecting half mirror, through combustion chamber
Backtracking reflects to half-reflecting half mirror through half-reflecting half mirror after the inwall reflection of mirror surface treatment, is exposed to perpendicular to former direction
Focusing mirror, line focus speculum converges the reflection with the second level crossing, eventually enters into high-speed photography camera, and in computer
Middle storage image file.
Described half-reflecting half mirror and combustion chamber is located between collimating mirror and focus lamp along light propagation path；For will be through
The directional light that collimating mirror is reflected is passed through, anti-through half into tested flow field, and after the treated inwall reflection in burned hysteroscope face
Pellicle mirror reflects, and exposes to focus lamp.
Described half-reflecting half mirror is located between collimating mirror and combustion chamber, combustion chamber and focusing mirror, and and water
Square put in 45 °, for through the parallel emergent light of collimating mirror, and the directional light that the cavity wall that burns is reflected
Perpendicular to the reflection of former direction.
Described combustion chamber carry one side visualization window, its fuel injector positioned on visualization window just to wall just
In；The inwall wall of the installing plate of combustion chamber fuel injector has carried out mirror surface treatment, and burning is injected for will transmit through half-reflecting half mirror
The directional light in chamber is reflected back half-reflecting half mirror along former road.
The invention has the advantages that：
By by multidirectional injector positioned on visualization window just to wall on, and to combustion chamber equipped with fuel injector
Wall inwall carries out mirror surface treatment, with reference to the set direction of half-reflecting half mirror printing opacity, is in horizontal direction by half-reflecting half mirror
45 ° are put, and the multi beam spraying such that it is able to spray fuel injector carries out positive observation, therefore can apply to many spray orifice oil spouts
Device, reaches the purpose that observation simultaneously is carried out to the spraying of many spray orifices.
Brief description of the drawings
Fig. 1 is the structural representation of the shadowgraph imaging system that the preferred embodiment of the present invention is used for the spraying measurement of many spray orifices.
Wherein：Light source 1；First level crossing 2；Collimating mirror 3；Half-reflecting half mirror 4；Combustion chamber 5；Focusing mirror 6；The
Two level crossings 7；High-speed photography camera 8；Computer 9.
Specific embodiment
It should be noted that in the case where not conflicting, the embodiment in the application can phase with the feature in embodiment
Mutually it is combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The present invention provides a kind of shadowgraph imaging system for the spraying measurement of many spray orifices, including light source along light path arrangement,
First level crossing, collimating mirror, half-reflecting half mirror, combustion chamber, focusing mirror, the second level crossing, high-speed photography camera and
Computer.Wherein, half-reflecting half mirror is located between collimating mirror and combustion chamber, combustion chamber and focusing mirror.
The light that light source sends is irradiated to the first level crossing, and collimating mirror is irradiated to after being reflected by level crossing, collimated
Become parallel rays after speculum, parallel rays is exposed in combustion chamber through half-reflecting half mirror, combustion chamber is equipped with fuel injector
Wall inwall has carried out mirror surface treatment, so parallel rays enters the inwall reflection of burned chamber mirror surface treatment after combustion chamber, it is former
Road is back to half-reflecting half mirror, and due to the set direction of half-reflecting half mirror printing opacity, parallel rays reflects through half-reflecting half mirror again,
Focusing mirror is exposed to perpendicular to former direction, line focus speculum is converged, then through the reflection of the second level crossing, eventually enters into height
Fast photographic camera, and imaging data is stored in computer.
Further, the first level crossing and the second level crossing are respectively used to the light reflection for sending light source, are irradiated to it
Collimating mirror and will converge speculum emergent light reflection, make it into high-speed photography camera.First level crossing and second flat
Face mirror changes the direction of light path by reflection light, makes the arrangement of whole system compacter.
Further, collimating mirror is located between the first level crossing and half-reflecting half mirror, for will be by the first level crossing
The emergent light of the diverging of reflection is transformed into exiting parallel light, into observation flow field；Focusing mirror is located at half-reflecting half mirror and the
Between two level crossings, for the emergent light of convergence is transformed into after being projected from flow field by the directional light that half-reflecting half mirror reflects.
In the case that arrangement site condition is allowed, the angle between collimating mirror and the incident ray and emergent ray of focusing mirror
Should be as small as possible, it is general in experiment to use 6 °.
Further, half-reflecting half mirror is located between collimating mirror and combustion chamber, combustion chamber and focusing mirror, with water
Square put in 45 °.Due to the set direction of half-reflecting half mirror printing opacity, the such ornaments of half-reflecting half mirror can make collimation
The emergent light of mirror parallel is passed through, and into observation flow field, and can make to project burning after the cavity wall mirror-reflection that burns
The directional light in chamber is reflected perpendicular to former direction.
Further, combustion chamber carry one side visualization window, its fuel injector positioned on visualization window just to wall
On, and the wall inwall equipped with fuel injector has carried out mirror surface treatment.Combustion chamber wall after mirror surface treatment can be through half instead
The parallel input light reflection that pellicle mirror is passed through, Shi Qiyanyuan roads are reflected back half-reflecting half mirror.
Reference picture 1, The embodiment provides a kind of shadowgraph imaging system for the spraying measurement of many spray orifices, including
Along the light source 1 of light path arrangement, the first level crossing 2, collimating mirror 3, half-reflecting half mirror 4, combustion chamber 5, focusing mirror 6,
Two level crossings 7, high-speed photography camera 8, computer 9, the burning cavity wall 10 of mirror surface treatment.Wherein, as shown in figure 1, half anti-half
Lens 4 are located between collimating mirror 3 and combustion chamber 5, combustion chamber 5 and focusing mirror 6.
The light that light source 1 sends is irradiated to collimating mirror 3 after being reflected through the first level crossing 2, becomes after collimated speculum 3
Into parallel rays, light is exposed in combustion chamber 5 through half-reflecting half mirror 4, after being reflected through the inwall 10 of the mirror surface treatment of combustion chamber 5
Backtracking is reflected to half-reflecting half mirror 4 through half-reflecting half mirror 4, and focusing mirror 6, line focus are exposed to perpendicular to former direction
Speculum 6 converges the reflection with the second level crossing 7, eventually enters into high-speed photography camera 8, and by image information storage in computer
In 9.
The present embodiment by by multidirectional injector positioned on visualization window just to wall on, and to combustion chamber 5
Wall inwall 10 equipped with fuel injector carries out mirror surface treatment, it is reflected the light for entering flow field, and combine half
The application of the set direction of the printing opacity of anti-pellicle mirror 4, the spraying such that it is able to spray fuel injector carries out positive observation, therefore
Multidirectional injector is can apply to, the purpose that observation simultaneously is carried out to the spraying of many spray orifices is reached.
In the particular embodiment, light source 1 is chosen as halogen tungsten lamp, and spectral region is wide, and luminous efficiency is high, uniform illumination.
In the present embodiment, the size of selected focusing mirror 3 and schlieren speculum 6 should meet, and it is parallel that it is reflected
Optical width can cover observation flow field.In system arrangement, light source 1 should be focusing mirror 3 to the distance of focusing mirror 3
Focal distance, also, schlieren speculum 6 should be the focal distance of schlieren speculum 6 to the distance of high-speed photography camera 8.
In the present embodiment, combustion chamber 5 carries one side visualization window, fuel injector positioned on its with visualization window just to wall
On face, and the wall inwall 10 equipped with fuel injector has carried out mirror surface treatment, and flow field is entered for will transmit through half-reflecting half mirror 4
Parallel input light is reflected back half-reflecting half mirror along former road.
In the present embodiment, reference picture 1, half-reflecting half mirror 4 is located at collimating mirror 3 and combustion chamber 5, combustion chamber 5 and focuses on
Between speculum 6, put in 45 ° with horizontal direction.Due to the set direction of half-reflecting half mirror printing opacity, half-reflecting half mirror 4
Ornaments can pass it through the directional light projected from collimating mirror, and the directional light that the cavity wall 10 that burns is reflected is vertical
In the reflection of former direction.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Anyway within the spirit and principles in the present invention, that is done is any
Modification, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (4)
1. it is a kind of for many spray orifices spraying measurement shadowgraph imaging system, it is characterised in that：Including light source, for output light letter
Number；And the first level crossing, collimating mirror, half-reflecting half mirror, the combustion being sequentially arranged along the light source output optical signal path
Burn chamber, focusing mirror, the second level crossing, high-speed photography camera, computer；The light that light source sends reflects through the first level crossing
After be irradiated to collimating mirror, parallel rays is become after collimated speculum, light exposes to combustion chamber through half-reflecting half mirror
Interior, backtracking reflects, perpendicular to original to half-reflecting half mirror through half-reflecting half mirror after being reflected through the inwall of combustion chamber mirror surface treatment
Direction exposes to focusing mirror, and line focus speculum converges the reflection with the second level crossing, eventually enters into high-speed photography camera,
And storage image file in a computer.
2. it is according to claim 1 it is a kind of for many spray orifices spraying measurement shadowgraph imaging system, it is characterised in that：It is described
Half-reflecting half mirror and combustion chamber along light propagation path be located between collimating mirror and focus lamp；For collimated mirror is reflected
Directional light pass through, into tested flow field, and after the treated inwall reflection in burned hysteroscope face, reflected through half-reflecting half mirror,
Expose to focus lamp.
3. it is according to claim 2 it is a kind of for many spray orifices spraying measurement shadowgraph imaging system, it is characterised in that：It is described
Half-reflecting half mirror be located between collimating mirror and combustion chamber, combustion chamber and focusing mirror, and with horizontal direction in 45 ° pendulum
Put, the emergent light parallel for passing through collimating mirror, and the directional light that the cavity wall that burns is reflected is perpendicular to former direction
Reflection.
4. it is according to claim 2 it is a kind of for many spray orifices spraying measurement shadowgraph imaging system, it is characterised in that：It is described
Combustion chamber carry one side visualization window, its fuel injector positioned on visualization window just to wall center；Combustion chamber sprays
The inwall wall of the installing plate of oily device has carried out mirror surface treatment, for will transmit through the directional light edge that half-reflecting half mirror injects combustion chamber
Former road is reflected back half-reflecting half mirror.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710146300.4A CN106932398A (en) | 2017-03-13 | 2017-03-13 | A kind of shadowgraph imaging system for the spraying measurement of many spray orifices |
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| CN201710146300.4A CN106932398A (en) | 2017-03-13 | 2017-03-13 | A kind of shadowgraph imaging system for the spraying measurement of many spray orifices |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226161A (en) * | 2018-01-15 | 2018-06-29 | 天津大学 | A kind of system and method for removing speckle phenomena in Laser Shadowgraphy experiment |
| CN108240968A (en) * | 2018-01-15 | 2018-07-03 | 天津大学 | A kind of shadowing method camera system that can realize ultrahigh speed high-resolution large-viewing-field and method |
| CN109124588A (en) * | 2018-09-25 | 2019-01-04 | 南开大学 | A kind of OCT probe for mouth disease inspection |
| CN109870453A (en) * | 2019-03-08 | 2019-06-11 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of measuring device and system |
| CN110443888A (en) * | 2019-08-15 | 2019-11-12 | 华南理工大学 | A kind of structural light three-dimensional reconstructing device and method forming multiple reflections imaging |
| CN110763479A (en) * | 2018-07-25 | 2020-02-07 | 清华大学 | Schlieren system based on quick compressor |
| CN110985256A (en) * | 2019-12-19 | 2020-04-10 | 哈尔滨工程大学 | Constant volume elastic reflector end cover and porous oil sprayer spraying test system applying same |
| CN111025663A (en) * | 2019-12-24 | 2020-04-17 | 哈尔滨工程大学 | LED array light source and porous spray test system applying same |
| CN111022228A (en) * | 2019-12-24 | 2020-04-17 | 哈尔滨工程大学 | Double-oil-sprayer series-connection injection system and porous spray test system applying same |
| CN111077046A (en) * | 2019-12-19 | 2020-04-28 | 哈尔滨工程大学 | Schlieren porous spray test system suitable for ultrahigh back pressure |
| CN113279886A (en) * | 2021-06-16 | 2021-08-20 | 哈尔滨工程大学 | Diesel engine high pressure common rail injector cleanliness detection device |
| CN115113456A (en) * | 2022-07-20 | 2022-09-27 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Rectangular light source and visualization device for high-speed impact shadow imaging of light gas gun |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240968A (en) * | 2018-01-15 | 2018-07-03 | 天津大学 | A kind of shadowing method camera system that can realize ultrahigh speed high-resolution large-viewing-field and method |
| CN108226161A (en) * | 2018-01-15 | 2018-06-29 | 天津大学 | A kind of system and method for removing speckle phenomena in Laser Shadowgraphy experiment |
| CN110763479A (en) * | 2018-07-25 | 2020-02-07 | 清华大学 | Schlieren system based on quick compressor |
| CN109124588A (en) * | 2018-09-25 | 2019-01-04 | 南开大学 | A kind of OCT probe for mouth disease inspection |
| CN109870453A (en) * | 2019-03-08 | 2019-06-11 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of measuring device and system |
| CN109870453B (en) * | 2019-03-08 | 2024-03-01 | 中国空气动力研究与发展中心高速空气动力研究所 | Measuring device and system |
| CN110443888A (en) * | 2019-08-15 | 2019-11-12 | 华南理工大学 | A kind of structural light three-dimensional reconstructing device and method forming multiple reflections imaging |
| CN111077046B (en) * | 2019-12-19 | 2022-11-18 | 哈尔滨工程大学 | Schlieren porous spray test system suitable for ultrahigh back pressure |
| CN110985256A (en) * | 2019-12-19 | 2020-04-10 | 哈尔滨工程大学 | Constant volume elastic reflector end cover and porous oil sprayer spraying test system applying same |
| CN111077046A (en) * | 2019-12-19 | 2020-04-28 | 哈尔滨工程大学 | Schlieren porous spray test system suitable for ultrahigh back pressure |
| CN110985256B (en) * | 2019-12-19 | 2021-05-14 | 哈尔滨工程大学 | Constant volume elastic reflector end cover and porous oil sprayer spraying test system applying same |
| CN111022228A (en) * | 2019-12-24 | 2020-04-17 | 哈尔滨工程大学 | Double-oil-sprayer series-connection injection system and porous spray test system applying same |
| CN111025663A (en) * | 2019-12-24 | 2020-04-17 | 哈尔滨工程大学 | LED array light source and porous spray test system applying same |
| CN113279886B (en) * | 2021-06-16 | 2022-11-04 | 哈尔滨工程大学 | Diesel engine high pressure common rail injector cleanliness detection device |
| CN113279886A (en) * | 2021-06-16 | 2021-08-20 | 哈尔滨工程大学 | Diesel engine high pressure common rail injector cleanliness detection device |
| CN115113456A (en) * | 2022-07-20 | 2022-09-27 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Rectangular light source and visualization device for high-speed impact shadow imaging of light gas gun |
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