CN106525671A - Combustion particle image acquisition device and method - Google Patents
Combustion particle image acquisition device and method Download PDFInfo
- Publication number
- CN106525671A CN106525671A CN201611113388.1A CN201611113388A CN106525671A CN 106525671 A CN106525671 A CN 106525671A CN 201611113388 A CN201611113388 A CN 201611113388A CN 106525671 A CN106525671 A CN 106525671A
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- Prior art keywords
- light source
- light
- burning
- burning particles
- particles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
- G01N15/0227—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging using imaging, e.g. a projected image of suspension; using holography
Abstract
The invention belongs to the field of optical imaging and particularly relates to a combustion particle image acquisition device and method, aiming at mainly solving the problem that a particle shape and a flame frontal surface cannot be distinguished in a combustion particle imaging process, and obtaining high-quality combustion particle and flame images. The device comprises a laser active light source, an expanded beam lens, a collimation lens, an attenuation sheet, a combustion particle placement platform, an optical filter and a camera. The laser active light source provided by the invention is used for illuminating, and the optical filter guarantees the passing of reflecting light of a wave band of the laser active light source and is used for an acquisition method of images photographed by the camera matched with the wave band of the laser active light source, so that a clear particle combustion image is obtained; the method is simple and easy to operate; the acquired image has high quality and less background noises; the difficulty that particles and flame form bright spots in a passive detection process is overcome; and in the obtained image, the particle shape and the flame frontal surface in the obtained image are clear and have a good distinction degree, and the success rate and accuracy of dividing the particles and flame can be improved.
Description
Technical field
The invention belongs to optical imaging field, and in particular to a kind of burning particles image acquiring device and method, emphasis solution
The problem that particle shape is cannot be distinguished by with flame front when burning particles of having determined are imaged, obtains high-quality burning particles with fire
Flame image.
Background technology
The change of size rule of the monitoring metallic particles combustion process such as Al, Mg, B, can be used for solid rocket ramjet,
The research of the engine solid propellant ignitions such as water punching engine, pulverized fuel punching engine and combustion mechanism.Using taking the photograph
When camera is continuously shot to metallic particles such as Al, Mg, the B in combustion process, because particle it is excessive with the light intensity that flame is produced,
Detector image planes saturation is caused, gained image is a very big speck, it is impossible to distinguish flame front and particle shape.Above-mentioned image
In acquisition method, the excessive bottleneck for becoming the technology of light intensity of particle and flame in combustion process.Therefore, explore a kind of solution
The image acquiring method that grain is cannot be distinguished by with flame, practical significance are notable.
The content of the invention
It is an object of the invention to provide a kind of burning particles image acquiring device and method, burned to improve metallic particles
The image quality of particle shape and flame front in journey.
In order to achieve the above object, the technical solution used in the present invention is as follows：
A kind of burning particles image acquiring device, the burning particles refer to the metallic particles such as Al, Mg, B, and particle diameter is
1mm～5mm, particle burning temperature are 1500K～3000K, and particle burning wavelength of transmitted light is 965nm～1931nm, and particle exists
Flame front and solid particle forms two parts are divided in combustion process.
It is characterized in that：Described device includes laser active light source, extender lens, collimation lens, attenuator, burning particles
Placement platform, optical filter and video camera；The laser active light source is continuous laser device, there is provided wave band is sent out with metallic particles burning
Penetrate the disjoint light source of optical band；The extender lens is expanded to the light that laser active light source is launched；The collimation lens
Laser after to expanding is collimated, and makes the light being radiated on burning particles be directional light；The attenuator is used to adjust irradiation
Laser intensity on burning particles；The burning particles placement platform is used to place the burning particles that need to be shot；The optical filtering
Piece is the bandpass filter matched with laser active light source spectrum, for filtering particle burning wavelength of transmitted light for 965nm-
The light of 1931nm wave bands；The video camera is used to shoot burning particles image, and the response spectrum of video camera can effectively cover sharp
The spectrum of light active light source；
The extender lens is arranged on the rear side of laser active light source outgoing light direction, and the collimation lens is arranged on and expands
On rear side of lens, the attenuator is arranged on rear side of collimation lens, and the burning particles placement platform is installed in declining through attenuator
In light beam range of exposures after subtracting, the optical filter is arranged in camera field of view before photosurface, the reflection of Jing burning particles
In laser active light source light range, the video camera is arranged on and can shoot in the range of burning particles.
Further, the adjustable attenuation of the attenuator, for changing the intensity of irradiation light.
Technical scheme also includes：A kind of burning particles image acquiring method, it is characterised in that：Laser active light
Source provides illumination light, forms directional light, then irradiate after attenuator decay after extender lens is expanded, collimation lens is collimated
On burning particles, the attenuator is adjustable attenuator, for changing the intensity of irradiation light, burning particles reflection laser master
The light of the launched laser wavelength of dynamic light source, due to burning particles it is different to the light degree of reflection of the wave band from flame, the figure of formation
As also different, the light of the laser active light source wave band of burning particles reflection is made to keep passing through using optical filter, using sense after optical filtering
The video camera that optical band is matched with laser active light source is taken pictures, and keeps burning particles in visual field.
Technical scheme has the advantage that or beneficial effect：
Laser active light source proposed by the present invention is used to illuminate, and optical filter ensures that the reflected light of laser active light source wave band is led to
Cross, the image acquiring method shot with the video camera matched with laser active light source wave band has obtained clearly particle burning
Image；The method is simple, easy to operate；Acquired picture quality is high, and ambient noise is few, particle and fire when overcoming passive detection
Flame forms a difficult problem for speck, particle shape and flame front is clear and discrimination is good in resulting image, is conducive to improving
Success rate and accuracy that grain is split with flame.
Description of the drawings
Fig. 1 is the structural representation of burning particles image acquiring device of the present invention；
Fig. 2 is burning particles image acquiring method flow chart of the present invention.
Label declaration：1- laser active light sources, 2- extender lenses, 3- collimation lenses, 4- attenuators, 5- burning particles are placed
Platform, 6- optical filters, 7- video cameras.
Specific embodiment
To make the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, to this
Invention is further elaborated.It should be appreciated that being exemplary below with reference to the embodiment of Description of Drawings, it is only limitted to
The present invention is explained, and is not considered as limiting the invention.
Fig. 1 is the burning particles image acquiring device structural representation that one embodiment of the invention is proposed, the device includes swashing
Light active light source 1, extender lens 2, collimation lens 3, attenuator 4, burning particles placement platform 5, optical filter 6 and video camera 7.
Laser active light source 1, there is provided wave band and the disjoint light source of particle burning transmitting optical band 965nm-1931nm, uses
The irradiation light when acquisition of burning particles image is provided；
Extender lens 2, installed in the rear side of laser active light source outgoing light direction, enters to the light of laser active light source transmitting
Row is expanded；
Collimation lens 3, on rear side of extender lens, to expanding after laser collimate, make to be radiated at burning particles
On light be directional light；
Attenuator 4, on rear side of collimation lens, attenuator is transmissibility of adjustable attenuation piece, is irradiated to burning particles for adjusting
On laser intensity；
Burning particles placement platform 5, in the light beam range of exposures after decaying through attenuator, needs to clap for placing
The burning particles taken the photograph；
Optical filter 6, before photosurface in camera field of view, the laser active light source light of Jing burning particles reflection
In the range of.The optical filter is the bandpass filter matched with laser active light source spectrum, for filtering particle burning launching light
Light of the wavelength for 965nm-1931nm wave bands；
Video camera 7, installed in shooting in the range of burning particles, for shooting burning particles image, the sound of video camera
Spectrum is answered effectively to cover the spectrum of laser active light source.
The present embodiment establishes a kind of structure of burning particles image acquiring device, and the installation to associated components and function
It is described, and the points for attention of the image acquiring device is illustrated.
Fig. 2 is burning particles image acquiring method flow chart proposed by the present invention, and the image acquisition procedures are as follows：By swashing
Light active light source irradiates, expands and provide after collimating irradiation light, adjusts the intensity that attenuator changes irradiation light, makes irradiation light irradiation
The metallic particles of burning, optical filter are passed through with laser active light source wave band identical light in making reflected light, for obtain particle and
Flame image.Video camera judges whether to need to adjust attenuator to improve image quality, obtains final metallic particles burned
Journey image.
The method provides the active light sources different from particle burning its own transmission optical band using laser, using particle and fire
The characteristics of flame is strong and weak to the reflection of the light of the active light source wave band different, using the video camera matched with laser active light source to
Image in grain combustion process is acquired.
A kind of method of burning particles image acquisition is present embodiments provided, the method operation is simple, effect is obvious, can
Good discrimination particle burning image Flame sharp side and solid particles surface form.
Claims (3)
1. a kind of burning particles image acquiring device, the burning particles refer to Al, Mg, B metallic particles, particle diameter be 1mm～
5mm, particle burning temperature are 1500K～3000K, and particle burning wavelength of transmitted light is 965nm～1931nm, and particle is burned
Flame front and solid particle forms two parts are divided in journey, it is characterised in that：Described device includes laser active light source, expands
Beam lens, collimation lens, attenuator, burning particles placement platform, optical filter and video camera；The laser active light source is lasting
Laser instrument, there is provided wave band and the disjoint light source of metallic particles burning transmitting optical band；The extender lens is to laser active light
The light of source transmitting is expanded；The collimation lens to expanding after laser collimate, make the light being radiated on burning particles
For directional light；The attenuator is irradiated to the laser intensity on burning particles for regulation；The burning particles placement platform is used
In the burning particles that placement need to shoot；The optical filter is the bandpass filter matched with laser active light source spectrum, is used for
Filter the light that particle burning wavelength of transmitted light is 965nm-1931nm wave bands；The video camera is used to shoot burning particles image,
The response spectrum of video camera can effectively cover the spectrum of laser active light source；
The extender lens is arranged on the rear side of laser active light source outgoing light direction, and the collimation lens is arranged on extender lens
Rear side, the attenuator are arranged on rear side of collimation lens, and the burning particles placement platform is after decaying through attenuator
Light beam range of exposures in, the optical filter is arranged in camera field of view before photosurface, the laser of Jing burning particles reflection
In active light source light range, the video camera is arranged on and can shoot in the range of burning particles.
2. burning particles image acquiring device according to claim 1, it is characterised in that：The adjustable decay of the attenuator
Amount, for changing the intensity of irradiation light.
3. a kind of method that employing claim 1 or 2 described devices obtain burning particles image, it is characterised in that：Laser is actively
Light source provides illumination light, forms directional light, then shine after attenuator decay after extender lens is expanded, collimation lens is collimated
Penetrate on burning particles, the attenuator is adjustable decay, for changing the intensity of irradiation light, burning particles reflection laser master
The light of the launched laser wavelength of dynamic light source, due to burning particles it is different to the light degree of reflection of the wave band from flame, the figure of formation
As also different, the light of the laser active light source wave band of burning particles reflection is made to keep passing through using optical filter, using sense after optical filtering
The video camera that optical band is matched with laser active light source is taken pictures, and keeps burning particles in camera field of view.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611113388.1A CN106525671A (en) | 2016-12-06 | 2016-12-06 | Combustion particle image acquisition device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611113388.1A CN106525671A (en) | 2016-12-06 | 2016-12-06 | Combustion particle image acquisition device and method |
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| Publication Number | Publication Date |
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| CN106525671A true CN106525671A (en) | 2017-03-22 |
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| CN201611113388.1A Pending CN106525671A (en) | 2016-12-06 | 2016-12-06 | Combustion particle image acquisition device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108968142A (en) * | 2018-04-17 | 2018-12-11 | 江苏瑞驰机电科技有限公司 | Laser cigarette paper or the monitoring device and differentiation detection method of cigarette punching |
| CN114459609A (en) * | 2022-04-12 | 2022-05-10 | 北京航空航天大学 | High-spatial-temporal-resolution full-field heat release rate measuring method and system |
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| JPH09268038A (en) * | 1996-01-31 | 1997-10-14 | Chichibu Onoda Cement Corp | Forecast and control of cement strength and production of cement clinker |
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| CN201867370U (en) * | 2010-11-17 | 2011-06-15 | 上海神明控制工程有限公司 | Hearth combustion laser detection system |
| CN102305757A (en) * | 2011-05-20 | 2012-01-04 | 西安电子科技大学 | Device and method for measuring concentration of high-pressure combustion carbon black particles |
| CN203465172U (en) * | 2013-08-22 | 2014-03-05 | 杭州电子科技大学 | Micro-combustion, gasified suspension, imaging and detection system for single particle fuel |
| CN105424558A (en) * | 2015-11-03 | 2016-03-23 | 上海理工大学 | Combustion particle multi-parameter measurement device and method adopting blue-ray back lighting |
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2016
- 2016-12-06 CN CN201611113388.1A patent/CN106525671A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4927267A (en) * | 1987-09-24 | 1990-05-22 | Universite Paris X - Nanterre | Method and apparatus for optically measuring, without contact, the granulometry of a cloud of particles or the roughness of a surface |
| JPH09268038A (en) * | 1996-01-31 | 1997-10-14 | Chichibu Onoda Cement Corp | Forecast and control of cement strength and production of cement clinker |
| CN2612943Y (en) * | 2003-03-14 | 2004-04-21 | 武汉大学 | Micro particle graininess laser imaging measuring apparatus |
| CN201867370U (en) * | 2010-11-17 | 2011-06-15 | 上海神明控制工程有限公司 | Hearth combustion laser detection system |
| CN102305757A (en) * | 2011-05-20 | 2012-01-04 | 西安电子科技大学 | Device and method for measuring concentration of high-pressure combustion carbon black particles |
| CN203465172U (en) * | 2013-08-22 | 2014-03-05 | 杭州电子科技大学 | Micro-combustion, gasified suspension, imaging and detection system for single particle fuel |
| CN105424558A (en) * | 2015-11-03 | 2016-03-23 | 上海理工大学 | Combustion particle multi-parameter measurement device and method adopting blue-ray back lighting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108968142A (en) * | 2018-04-17 | 2018-12-11 | 江苏瑞驰机电科技有限公司 | Laser cigarette paper or the monitoring device and differentiation detection method of cigarette punching |
| CN108968142B (en) * | 2018-04-17 | 2021-11-02 | 江苏瑞驰机电科技有限公司 | Monitoring device and distinguishing and detecting method for laser drilling of cigarette paper or cigarette |
| CN114459609A (en) * | 2022-04-12 | 2022-05-10 | 北京航空航天大学 | High-spatial-temporal-resolution full-field heat release rate measuring method and system |
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Application publication date: 20170322 |