CN105842197A - Luminous flow field diagnostic system and structure display and parameter measurement method - Google Patents
Luminous flow field diagnostic system and structure display and parameter measurement method Download PDFInfo
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- CN105842197A CN105842197A CN201610160869.1A CN201610160869A CN105842197A CN 105842197 A CN105842197 A CN 105842197A CN 201610160869 A CN201610160869 A CN 201610160869A CN 105842197 A CN105842197 A CN 105842197A
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- Prior art keywords
- flow field
- luminous flow
- luminous
- moire fringe
- diagnostic system
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
Abstract
The invention provides a luminous flow field diagnostic system which includes a detection light source, a luminous flow field and a moire fringe generation device which are in linear arrangement along an optical axis in turn, and also includes a first image sensor and a second image sensor which are in communication connection with a computer; a light beam provided by the detection light source passes through the luminous flow field and then forms moire fringes in the moire fringe generation device; the first image sensor records brightness distribution of the luminous flow field, and the second image sensor records the moire fringes formed in the moire fringe generation device; stereo structure display of the luminous flow field is obtained according to the brightness distribution, and the stereo refraction rate distribution of the luminous flow field is obtained according the moire fringes. The invention also provides a structure display and parameter measurement method for the luminous flow field.
Description
[technical field]
The invention belongs to optical detector technology field, more particularly to the diagnostic system in a kind of luminous flow field
And structure shows and measurement method of parameters.
[background technology]
The mechanism phenomenon in high temperature luminescence flow field and the 3-D whole audience of structure shows, temperature and gas component
And the accurate of electron number densitiy measures the design to aircraft and development, material selection, observing and controlling, system
Lead, alert and and ground between Communication etc. all seem particularly basis and crucial.Except in the modern times
Aeronautics and Astronautics and military affairs have outside universality, are also widely present at industrial and civilian aspect,
As: energy project, high-temperature machining, process, weld, surface processes and smelting etc..
But, this type of temperature is up to thousands of degree degree the most up to ten thousand, astable on the time, spatial distribution is non-
The 3-D whole audience in uniform luminous flow field shows and key parameter (such as: temperature etc.) is measured the most not yet
It is well solved.And, the light that the most this kind of field sends itself is also possible to affect experiment
Measure.
Therefore, it is necessary to provide examining of a kind of luminous flow field combining Moire effect and transmitting chromatographic technique
Disconnected system, and 3-D structure based on described diagnostic system shows and crucial parameter measurement method.
[summary of the invention]
It is an object of the invention to provide the diagnostic system in a kind of luminous flow field and structure shows and parameter is surveyed
Metering method.
Technical scheme is as follows: the diagnostic system in a kind of luminous flow field, including along optical axis successively
The probe source of linear array, luminous flow field and Moire fringe generating means, and respectively with computer
First imageing sensor of communication connection and the second imageing sensor；The light beam that described probe source provides
Through described luminous flow field, and in described Moire fringe generating means, form Moire fringe, described the
The Luminance Distribution in luminous flow field, described second image recording sensor institute described in one image recording sensor
State the Moire fringe formed in Moire fringe generating means, and obtain described sending out according to described Luminance Distribution
The stereochemical structure of optical flow field shows and obtains the three-dimensional refraction in described luminous flow field according to described Moire fringe
Rate is distributed.
In the diagnostic system in the luminous flow field that the embodiment of the present invention provides, according to described Luminance Distribution and
The spatial match of described three-dimensional index distribution carries out Reconstruction to described luminous flow field.
In the diagnostic system in the luminous flow field that the embodiment of the present invention provides, according in described luminous flow field
The spatial distribution in portion carries out partitioned parameters reconstruction to described luminous flow field.
In the diagnostic system in the luminous flow field that the embodiment of the present invention provides, in described probe source and institute
State and between luminous flow field, be additionally provided with beam-expanding collimation device, described beam-expanding collimation device and described detection light
Source and described luminous flow field are arranged with optical axis.
In the diagnostic system in the luminous flow field that the embodiment of the present invention provides, described Moire fringe generates dress
Put grating assembly, imaging lens arrangement and the Moire fringe included along described optical axis successively linear array to connect
Receive screen.
In the diagnostic system in the luminous flow field that the embodiment of the present invention provides, described imaging lens arrangement bag
Include the first lens and the second lens that relative spacing is arranged, and at described first lens and described second saturating
Being additionally provided with wave filter between mirror, described wave filter is shared the same light with described first lens and described second lens
Axle is arranged.
In the diagnostic system in the luminous flow field that the embodiment of the present invention provides, at described first image sensing
The attenuator for protecting described first imageing sensor is added before the camera lens of device.
A kind of structure according to the luminous flow field of the diagnostic system in the luminous flow field described in foregoing shows
And measurement method of parameters, comprise the steps:
Gather the Luminance Distribution in luminous flow field, and obtain described luminous flow field according to described Luminance Distribution
Stereochemical structure shows；And
Gather the Moire fringe that light beam is formed in described Moire fringe generating means, and according to described More
Striped obtains the three-dimensional index distribution in described luminous flow field.
Structure in the luminous flow field that the embodiment of the present invention provides shows and in measurement method of parameters, to institute
State Luminance Distribution and described three-dimensional index distribution carries out spatial match operation, and to described luminous flow field
Carry out Reconstruction.
Structure in the luminous flow field that the embodiment of the present invention provides shows and in measurement method of parameters, according to
Described luminous spatial distribution within flow field carries out partitioned parameters reconstruction to described luminous flow field.
The beneficial effects of the present invention is: the diagnostic system in described luminous flow field and structure shows and parameter
In measuring method, the Luminance Distribution and the described Moire fringe generating means that gather luminous flow field respectively are formed
Moire fringe, and obtain the stereochemical structure in described luminous flow field according to described Luminance Distribution and show and root
Obtain the three-dimensional index distribution in described luminous flow field according to described Moire fringe, take full advantage of emission layer
Analysis diagnostic techniques and More's deflection tomography technology carry out the structure in described luminous flow field and shows and examine with parameter
Disconnected, thus for can preferably solve each display in type high temp luminescence flow field and the measurement of key parameter carries
For theoretical basis and experimental basis.
Additionally, during described luminous flow field is carried out Reconstruction, use partitioned parameters to rebuild
Mode, can improve the accuracy and precision that described luminous flow field parameter is rebuild further.
[accompanying drawing explanation]
The structural representation of the diagnostic system in the luminous flow field that Fig. 1 provides for the embodiment of the present invention；
The structure in the luminous flow field that Fig. 2 provides for embodiments of the invention shows and measurement method of parameters
FB(flow block)；
Fig. 3 is the three-dimensional Luminance Distribution schematic diagram of Propane-air Combustion Flow Field；
Fig. 4 is the three-dimensional index distribution schematic diagram of Propane-air Combustion Flow Field；
Fig. 5 is the coupling signal of three-dimensional index distribution shown in three-dimensional Luminance Distribution shown in Fig. 3 and Fig. 4
Figure；
Fig. 6 is the Propane-air burning that the spatial match according to brightness shown in Fig. 5 and refractive index obtains
The Temperature Distribution schematic diagram in flow field.
[detailed description of the invention]
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, the present invention is further elaborated.The retouching of specific distinct unless the context otherwise
State, the element in the present invention and assembly, quantity both can single presented in, it is also possible to multiple
Form exists, and this is not defined by the present invention.Although the label of the step in the present invention is carried out
Arrangement, but be not used to limit the precedence of step, unless expressly stated step order or
Based on the execution of certain step needs other steps, otherwise the relative rank of step is adjustable in.
It is appreciated that term "and/or" used herein relates to and contains in the Listed Items being associated
One or more of any and all possible combination.
The description of specific distinct unless the context otherwise, the element in the present invention and assembly, quantity both may be used
Presented in single, it is also possible to presented in multiple, this is not defined by the present invention.
Diagnosis please refer to the luminous flow field that Fig. 1 and Fig. 2, Fig. 1 provide for the embodiment of the present invention
The structural representation in system front；The diagnosis system in the luminous flow field that Fig. 2 provides for embodiments of the invention
The structural representation of system reverse side.
The diagnostic system 100 in the luminous flow field that the present invention provides is suitable for the high temperature luminescence stream to certain scale
Field carries out structure and shows and parameter diagnosis.The diagnostic system 100 in described luminous flow field includes depending on along optical axis
The probe source 10 of secondary linear array, beam-expanding collimation device 20, luminous flow field 30 and Moire fringe are raw
Become device 40, and the first imageing sensor 50 and the second image being connected respectively with compunication
Sensor 60.Wherein, described luminous flow field 30 is the complicated luminous flow field, such as propane-sky of high temperature
The compressible high temperature flow fields such as gas firing flow field.And, the light beam that described probe source 10 provides is successively
By described beam-expanding collimation device 20, described luminous flow field 30 and described Moire fringe generating means 40.
Described probe source 10 provides the excitation beam of the diagnostic system 100 in described luminous flow field, preferably
Ground, described probe source 10 is to provide the laser acquisition light source 10 of laser beam.Selectively, institute
Stating probe source 10 and can also is that offer infrared ray or the probe source of other proper beam, this needs root
Determining according to the requirement of diagnostic system 100 in described luminous flow field, this is not limited by the present invention.
Described beam-expanding collimation device 20 can provide the circular light spot that the depth of parallelism is higher over long distances
Light beam, and when distance changes, spot size keeps being basically unchanged.In the present embodiment,
Described beam-expanding collimation device 20 is adjusted for the light beam providing described probe source 10, and protects
The light beam demonstrate,proved in described luminous flow field 30 has the high depth of parallelism and the feature of low divergence.
Described Moire fringe generating means 40 can utilize the light beam by described luminous flow field 30 to generate
Moire fringe.In the present embodiment, described Moire fringe generating means 40 includes along described optical axis successively
The grating assembly 41 of linear array, imaging lens arrangement 42 and Moire fringe receiving screen 43.Wherein,
Described grating assembly 41 includes the first grating 411 and the second grating 412 that relative spacing is arranged, described
Imaging lens arrangement 42 includes the first imaging len 421 and the second imaging len that relative spacing is arranged
422.Preferably, cleaning Moire fringe distribution accurately in order to obtain, described Moire fringe generates
Device 40 is typical 4-f system.
And, in described Moire fringe generating means 40, in order to remove veiling glare to Moire fringe
Impact, is additionally provided with for eliminating between described first imaging len 421 and the second imaging len 422
The wave filter 44 of veiling glare, described wave filter 44 and described first lens 421 and described second lens
422 are arranged with optical axis.
The corresponding described luminous flow field 30 of described first imageing sensor 50 is arranged, and is used for recording described sending out
The Luminance Distribution of optical flow field 30；The described second corresponding described Moire fringe of imageing sensor 60 generates dress
Put 40, for recording the Moire fringe formed in described Moire fringe generating means 40.In this enforcement
In example, described first imageing sensor 50 and described second imageing sensor 60 are all that ccd image passes
Sensor.It is additionally, since described luminous flow field 30 and may send high light, in order to protect described first figure
As sensor 50, add for protecting described first before the camera lens of described first imageing sensor 50
The attenuator (not shown) of imageing sensor.
In the diagnostic system 100 in described luminous flow field, send out owing to described luminous flow field 30 has itself
The characteristic of light, the most described first imageing sensor 50 can record the brightness in described luminous flow field 30 and divide
Cloth, and the described Luminance Distribution transmission recorded is to described computer, and profit in described computer
Realize the stereochemical structure in described luminous flow field 30 is shown with launching chromatography diagnostic techniques.And, described
Second imageing sensor 60 records the Moire fringe on described Moire fringe receiving screen 43, and is remembered
The described Moire fringe of record sends to described computer, and utilizes More's deviation layer in described computer
Analysis technology obtains the three-dimensional index distribution in described luminous flow field 30.
Further, also divide according to described Luminance Distribution and described three-dimensional refractive index in described computer
The spatial match of cloth carries out Reconstruction to described luminous flow field 30.Such as, according to described luminous flow field
Spatial distribution within 30 is different, and described luminous flow field 30 is carried out partitioned parameters reconstruction, then
The whole audience Reconstruction in described luminous flow field 30 is constituted in combination.
The luminous flow field of the diagnostic system 100 based on described luminous flow field that the embodiment of the present invention provides
Structure shows and measurement method of parameters 200, and it comprises the steps:
Step S1, the Luminance Distribution in the luminous flow field of collection, and obtain described sending out according to described Luminance Distribution
The stereochemical structure of optical flow field shows；
The Moire fringe that step S2, collection light beam are formed in described Moire fringe generating means, and according to
Described Moire fringe obtains the three-dimensional index distribution in described luminous flow field；And
Step S3, described Luminance Distribution and described three-dimensional index distribution are carried out spatial match operation,
And described luminous flow field is carried out Reconstruction.
Wherein, the structure in described luminous flow field shows and in measurement method of parameters 200, in order to quickly
Obtaining the Reconstruction in described luminous flow field, described step S1 and described step S2 are carried out simultaneously.When
So, it is not limited to the present embodiment, described step S1 and described step S2 can also carry out step by step.
The composition kind being additionally, since described luminous flow field 30 is different with the spatial distribution of composition, therefore
Can be different according to the spatial distribution within described luminous flow field 30, and described luminous flow field 30 is entered
Row partitioned parameters is rebuild, and then constitutes the whole audience Reconstruction in described luminous flow field 30 in combination.
As a example by Propane-air Combustion Flow Field, the structure in described luminous flow field is shown and parameter measurement side
Method 200 is described.
First, as it is shown on figure 3, gather the three-dimensional Luminance Distribution of described Propane-air Combustion Flow Field, and
Show according to the stereochemical structure that described three-dimensional Luminance Distribution obtains described Propane-air Combustion Flow Field.
Then, as shown in Figure 4, More's bar that light beam is formed is gathered in described Moire fringe generating means
Stricture of vagina, and the three-dimensional index distribution of described Propane-air Combustion Flow Field is obtained according to described Moire fringe.
Finally, as shown in Figure 5 and Figure 6, described Luminance Distribution and described three-dimensional index distribution are entered
Row space matching operation, and described Propane-air Combustion Flow Field is carried out Reconstruction, thus obtain institute
State the Temperature Distribution of Propane-air Combustion Flow Field.
Compared to prior art, diagnostic system 100 and the structure in the luminous flow field that the present invention provides show
With in measurement method of parameters 200, gather the Luminance Distribution in luminous flow field 30 and described Moire fringe respectively
The Moire fringe that generating means 40 is formed, and obtain described luminous flow field 30 according to described Luminance Distribution
Stereochemical structure show and obtain the three-dimensional refractive index in described luminous flow field 30 according to described Moire fringe
Distribution, takes full advantage of transmitting chromatography diagnostic techniques and More's deflection tomography technology carries out described luminous stream
The structure of field 30 shows and parameter diagnosis, thus for can preferably solve each type high temp luminescence flow field
The measurement of display and key parameter is provided fundamental basis and experimental basis.
Additionally, during described luminous flow field 30 is carried out Reconstruction, use partitioned parameters to rebuild
Mode, the accuracy and precision of described luminous flow field 30 Reconstruction can be improved further.
It is obvious to a person skilled in the art that the invention is not restricted to the thin of above-mentioned one exemplary embodiment
Joint, and without departing from the spirit or essential characteristics of the present invention, it is possible to concrete with other
Form realizes the present invention.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary
, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above
It is fixed, it is intended that all changes fallen in the implication of equivalency and scope of claim are included
In the present invention.Any reference in claim should not be considered as limit involved right want
Ask.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, but the most each
Embodiment only comprises an independent technical scheme, and this narrating mode of description is only is clear
Chu Qijian, those skilled in the art should be using description as an entirety, the technology in each embodiment
Scheme can also form, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that.
Claims (10)
1. the diagnostic system in a luminous flow field, it is characterised in that include along optical axis successively linear array
Probe source, luminous flow field and Moire fringe generating means, and be connected with compunication respectively
The first imageing sensor and the second imageing sensor；The light beam that described probe source provides is through described
Luminous flow field, and in described Moire fringe generating means, form Moire fringe, described first image passes
The Luminance Distribution in luminous flow field described in sensor record, More's bar described in described second image recording sensor
The Moire fringe formed in stricture of vagina generating means, and obtain described luminous flow field according to described Luminance Distribution
Stereochemical structure shows and obtains the three-dimensional index distribution in described luminous flow field according to described Moire fringe.
The diagnostic system in luminous flow field the most according to claim 1, it is characterised in that: according to institute
The spatial match stating Luminance Distribution and described three-dimensional index distribution carries out parameter weight to described luminous flow field
Build.
The diagnostic system in luminous flow field the most according to claim 3, it is characterised in that: according to institute
State luminous spatial distribution within flow field and described luminous flow field is carried out partitioned parameters reconstruction.
The diagnostic system in luminous flow field the most according to claim 1, it is characterised in that: described
It is additionally provided with beam-expanding collimation device, described beam-expanding collimation device between probe source and described luminous flow field
Arrange with optical axis with described probe source and described luminous flow field.
The diagnostic system in luminous flow field the most according to claim 1, it is characterised in that: described not
You include the grating assembly along described optical axis successively linear array, imaging lens arrangement at striped generating means
With Moire fringe receiving screen.
The diagnostic system in luminous flow field the most according to claim 5, it is characterised in that: described one-tenth
As lens subassembly includes the first lens and the second lens that relative spacing arranges, and at described first lens
And between described second lens, it is additionally provided with wave filter, described wave filter and described first lens and described
Second lens are arranged with optical axis.
The diagnostic system in luminous flow field the most according to claim 1, it is characterised in that: described
The attenuator for protecting described first imageing sensor is added before the camera lens of the first imageing sensor.
8. the structure in the luminous flow field of the diagnostic system in a luminous flow field according to claim 1
Display and measurement method of parameters, it is characterised in that: comprise the steps:
Gather the Luminance Distribution in luminous flow field, and obtain described luminous flow field according to described Luminance Distribution
Stereochemical structure shows；And
Gather the Moire fringe that light beam is formed in described Moire fringe generating means, and according to described More
Striped obtains the three-dimensional index distribution in described luminous flow field.
The structure in luminous flow field the most according to claim 8 shows and measurement method of parameters, and it is special
Levy and be: described Luminance Distribution and described three-dimensional index distribution are carried out spatial match operation, and right
Described luminous flow field carries out Reconstruction.
The structure in luminous flow field the most according to claim 9 shows and measurement method of parameters, its
It is characterised by: according to the spatial distribution within described luminous flow field, described luminous flow field is carried out subregion ginseng
Number is rebuild.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610160869.1A CN105842197A (en) | 2016-03-21 | 2016-03-21 | Luminous flow field diagnostic system and structure display and parameter measurement method |
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| CN201610160869.1A CN105842197A (en) | 2016-03-21 | 2016-03-21 | Luminous flow field diagnostic system and structure display and parameter measurement method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279115A (en) * | 2018-04-28 | 2018-07-13 | 中国空气动力研究与发展中心超高速空气动力研究所 | Superb thin flow field temporal-spatial evolution diagnostic device based on pulsed discharge and method |
| CN110360954A (en) * | 2019-08-14 | 2019-10-22 | 山东师范大学 | A kind of surface shape measurement method and system based on spatial coordinates calculation |
| CN111397845A (en) * | 2020-04-27 | 2020-07-10 | 南京信息工程大学 | Method for judging influence of non-collimated light on Moire measurement result |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279115A (en) * | 2018-04-28 | 2018-07-13 | 中国空气动力研究与发展中心超高速空气动力研究所 | Superb thin flow field temporal-spatial evolution diagnostic device based on pulsed discharge and method |
| CN108279115B (en) * | 2018-04-28 | 2023-09-05 | 中国空气动力研究与发展中心超高速空气动力研究所 | Pulse discharge-based high ultra-thin flow field space-time evolution diagnosis device and method |
| CN110360954A (en) * | 2019-08-14 | 2019-10-22 | 山东师范大学 | A kind of surface shape measurement method and system based on spatial coordinates calculation |
| CN111397845A (en) * | 2020-04-27 | 2020-07-10 | 南京信息工程大学 | Method for judging influence of non-collimated light on Moire measurement result |
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