CN106124369B - A kind of close-coupled whole audience rainbow measuring probe - Google Patents
A kind of close-coupled whole audience rainbow measuring probe Download PDFInfo
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- CN106124369B CN106124369B CN201610405658.XA CN201610405658A CN106124369B CN 106124369 B CN106124369 B CN 106124369B CN 201610405658 A CN201610405658 A CN 201610405658A CN 106124369 B CN106124369 B CN 106124369B
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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
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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
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Abstract
The present invention relates to whole audience rainbow measuring techniques, it is desirable to provide a kind of close-coupled whole audience rainbow measuring probe.The probe includes front lens, interior len, rotary regulator and the trepanning partition board being sequentially arranged along light path；Front lens and interior len are smaller than the focal length of the two lens, and ensure the equivalent image space focal plane of the two lens between interior len and interior len focal plane；Rotary regulator is located in interior len image space focal plane, and center is fixed on trepanning partition board and can be rotated around center；Zoom lens is housed in CCD camera, front lens and the clear rainbow images at the equivalent image space focal plane of interior len can be recorded.The present invention utilizes whole audience rainbow technology measuring principle, operating distance can be changed by double lens, band zoom lens CCD camera greatly reduces system length, convenient for popularization and practical application in industry, can realize good spray field measurement effect.Variable-operation range measurement of the present invention, single unit system is small and exquisite, carries and applies in practice convenient for engineering.
Description
Technical field
The present invention relates to whole audience rainbow measuring techniques, and in particular to be a kind of based on double lens and with zoom lens CCD
The rainbow of the close-coupled adjustable working distance of the parameters such as camera measurement spray droplet particle diameter distribution, refractive index, temperature (or component)
Scatterometry is popped one's head in.
Background technology
Liquid spray in biphase gas and liquid flow is universally present in fields such as the current energy, environment, chemical industry.In order to improve
Efficiency of combustion, by liquid fuel atomization combustion by evaporation；In station boiler desulphurization denitration equipment gas-liquid atomization blended absorbent be then for
Reduction pollutant emission, thus effectively and accurately measure spray droplet in complicated spray field multi-parameter is necessary and meaning
Justice.Traditional contact measurement method such as immersion method, tracing, sedimentation, freezing process, molten cured method and instantaneous sample method etc., is deposited
Be easily destroyed original flow field, spray field internal measurement can not be goed deep into, can not measure in real time the shortcomings of, and it is inadaptable current
Measurement demand when high-precision real.The advanced measuring method of non-interfering type then breaches above-mentioned limitation, original with not interfering
The advantages such as flow field, precision height, wide range of measurement, rapid in real time.
Classify according to measurement type, the common methods for measuring spray field size droplet diameter have：Light scattering method, laser induced fluorescence
Method, Digital Holography, laser interference particle imaging technique (ILIDS), phase-Doppler particle analyzer (PDA)；Measure spray droplet
The common methods of refractive index have：V-arrangement prism method, glancing incidence method (Abbe refractometer), interference fringe (Newton's ring) method；Measure spraying
The measurement method of drop grain temperature mainly has fluorescence method；Measuring the common method of spraying field concentration has：False-color method, shadowing method,
Chromatography imaging technique (CT).Wherein phase-Doppler particle analyzer, light scattering method belong to single-point measurement method, and also known as zero dimension measures；Grain
Subgraph velocity measuring technique (PIV), planar laser inductive technology (PLIF), laser interference particle imaging technique belong to two-dimensional measurement side
Method；Digital Holography, high-speed photography belong to method for three-dimensional measurement.
Rainbow technology is one kind can measure the parameters such as size droplet diameter or particle diameter distribution, refractive index, temperature (or component) simultaneously
Light scattering method, be divided into standard rainbow technology (SRT) and whole audience rainbow technology (GRT).The basic principle of standard rainbow is sharp
Light light beam is irradiated in spherical droplets, and part anaclasis to drop internal reflects away after drop inner surface primary event, phase
Mutually interference forms light and dark striped (being known as single order rainbow)；Separately there is part light directly to be reflected by drop outer surface, reflected light
It is interfered between the emergent light of an internal reflection, forms the ripple (being known as ripple structures) of a series of high frequency oscillation
It is attached to be stacked on single order rainbow.Since single order rainbow contains required metrical information, and a variety of high frequency items in rainbow signal
Line can impact measurement accuracy, it is therefore desirable to go high frequency oscillation structure to form smooth rainbow signal image filtering.Entirely
Field rainbow technology is then by prolonging exposure time and to expand clear aperature, and recording thousands of has certain grain size distribution
The rainbow of drop, since the scattering light of multiple particles is overlapped mutually, the high frequency ripple being attached on individual particle single order rainbow is believed
It number is eliminated, it can smooth rainbow signal；It is not high to the sensitivity of non-spherical droplets simultaneously, therefore to the spherical shape of spray field drop
Spend no requirement (NR), and then the parameters such as the grain size of inverting spray liquid grain and distribution, mean refractive index, mean temperature.Whole audience rainbow technology
Non-contact one kind, multi-parameter, high-precision, real-time online measuring are provided for liquid spray field measurement field in biphase gas and liquid flow.
Although what whole audience rainbow measuring technique measured is thousands of a drops, still belongs to single-point and determine operating distance survey
Amount.In practical application, the different location to liquid spray field is needed to measure.But as the survey that spray field allows in fixed container
It is unique and fixed to measure position, and whole audience rainbow technological system entire length is long in laboratory.These are all unfavorable in work
Journey Rapid Popularization in practice and application.
For this purpose, close-coupled whole audience rainbow measuring device of the present invention utilizes whole audience rainbow technology measuring principle, pass through
Operating distance can be changed in double lens, and band zoom lens CCD camera is as the very big reduction system length of image recorder, convenient for pushing away
Wide and practical application in industry, can realize good spray field measurement effect.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of close-coupled whole audience rainbow survey
Amount probe.The probe variable-operation range measurement, single unit system is small and exquisite, carries and applies in practice convenient for engineering.
To solve technical problem, the technical solution adopted by the present invention is：
A kind of close-coupled whole audience rainbow measuring probe, including light path system and CCD camera are provided；The light path system includes
Front lens, interior len, rotary regulator and the trepanning partition board being sequentially arranged along light path, the position relationship of each component are：Front lens
It is smaller than the focal length of the two lens with interior len, and ensures that the equivalent image space focal plane of the two lens is located at interior len
Between interior len focal plane；Rotary regulator is located in interior len image space focal plane, and center is fixed by screws in
It can rotate on trepanning partition board and around center；Zoom lens is housed, lens parameters are saturating before so that CCD camera is recorded in CCD camera
Mirror and the clear rainbow images at the equivalent image space focal plane of interior len.
In the present invention, the light path system and CCD camera are mounted in columnar main casing, and the both ends of main casing are set
Dismountable head cover；The front lens, interior len, trepanning partition board are screwed on a main housing, and CCD camera is by fixing filling
Block, which is realized, to be fixed.
In the present invention, it is also equipped with a leveling reflective mirror on the inside of the main casing, is equipped on its opposite main casing
One side opening to be opened/closed.
In the present invention, on the main casing at the zoom lens of CCD camera, if there are one for replacing being opened and closed for camera lens
Side door.
In the present invention, the rotary regulator tilts reflective mirror and a paster LED lamp group by 4 aperture diaphragms, one
At；The aperture of the aperture diaphragm is 2mm, 4mm, 10mm, 20mm respectively, and the inclination angle for tilting reflective mirror is fixed, patch
LED light is 0.5W, is powered by 3V button cells, and is equipped with Micro-touch switch.
In the present invention, the CCD camera with zoom lens, CCD chip is frame frequency and time for exposure adjustable line
Property CCD, pixel coverage is 1~16M, highest frequency 30Hz, ranging from 10~20 ° of detection rainbow angle attachment, angle of minimum resolution
It it is 0.002 °, zoom lens amplification factor is 1/5~1/3.
In the present invention, on the head cover positioned at CCD camera side, it is equipped with power interface and data transmission interface trepanning.
In the present invention, the front lens is interchangeable, a diameter of 100mm, replaceable focal range be 100mm~
500mm；The a diameter of 100mm of interior len, focal length 160mm.
In the present invention, the protective shell is cylindrical structure made of metal material.
In the present invention, on the main casing at rotary regulator position, if there are one opening, the outer rim of rotary regulator is stretched
Go out opening to adjust for rotation.
Compared with prior art, the beneficial effects of the present invention are：
1, whole audience rainbow technology measuring principle is utilized in close-coupled whole audience rainbow measuring probe of the invention, passes through double lens
Changeable operating distance, band zoom lens CCD camera is as the very big reduction system length of image recorder, convenient for popularization and in fact
Border commercial Application can realize good spray field measurement effect.
2, probe variable-operation range measurement of the invention, single unit system is small and exquisite, carries and applies in practice convenient for engineering.
Description of the drawings
Fig. 1 close-coupled whole audience rainbow measuring probe index paths；
Fig. 2 close-coupled whole audience rainbow measuring probe structural exploded views.
1. front lens in figure；2. interior len；3. rotary regulator；4. trepanning partition board；5.CCD cameras；6. fixing filling block；
7. back header；8. pretectum；9. side opening；10. leveling reflective mirror；11. screw；12. main casing.
Specific implementation mode
It is further described in detail below in conjunction with the accompanying drawings：
Close-coupled whole audience rainbow measuring probe in the present invention, including light path system and CCD camera 5；The light path system
Include front lens 1, interior len 2, rotary regulator 3 and the trepanning partition board 4 being sequentially arranged along light path, the position relationship of each component
For：Front lens 1 is smaller than the focal length of the two lens with interior len 2, and ensures that the equivalent image space coke of the two lens is flat
Face is between interior len 2 and the focal plane of interior len 2；Rotary regulator 3 is located in 2 image space focal plane of interior len, center
Position is fixed by screws on trepanning partition board 4 and can be rotated around center；Zoom lens, lens parameters are housed in CCD camera 5
CCD camera 5 is set to record front lens 1 and the clear rainbow images at 2 equivalent image space focal plane of interior len；
The light path system and CCD camera 5 are mounted on metal material and are made in columnar main casing 12, main casing 12
Both ends set dismountable pretectum 8 and back header 7, pretectum 7, back header 8 are fixed on by screw 11 on main casing 12.Before
Lens 1, interior len 2, trepanning partition board 4 are fixed on screw 11 respectively (in the present invention, screw 11 has multiple) on main casing 12,
CCD camera 5 realizes fixation with zoom lens and by fixed filling block 6.
It is also equipped with a leveling reflective mirror 10 in the inside of main casing 12, sets that there are one can on its opposite main casing 12
The side opening 9 of opening and closing.Leveling reflective mirror 10 is used under leveling pattern, is adjusted light path to level, is ensured the central shaft of probe and swash
Light is in same level.Side opening 9 is open state under light path leveling pattern, determining measurement dot pattern, is formally measuring mould
It is closed configuration under formula.
On main casing 12 at the camera lens of CCD camera 5, if there are one be opened and closed side door for replace camera lens.In place
In on the back header 7 of 5 side of CCD camera, it is equipped with power interface and data transmission interface trepanning.At 3 position of rotary regulator
Main casing 12 on, if there are one opening, the outer rim of rotary regulator 3 stretches out opening and is adjusted to different operating mould for rotation
Formula.
Front lens 1 is interchangeable, a diameter of 100mm, and replaceable focal range is 100mm~500mm；It is described interior
Mirror a diameter of 100mm, focal length 160mm.Rotary regulator 3 tilts reflective mirror, a patch by 4 aperture diaphragms and one
LED light forms；The aperture of aperture diaphragm is 2mm, 4mm, 10mm, 20mm respectively, and the inclination angle for tilting reflective mirror is fixed, patch
Piece LED light is 0.5W, is powered by 3V button cells, and is equipped with Micro-touch switch.When the CCD chip of CCD camera 5 is frame frequency and exposure
Between adjustable linear CCD, pixel coverage is 1~16M, highest frequency 30Hz, ranging from 10~20 ° of detection rainbow angle attachment,
Angle of minimum resolution is 0.002 °, and zoom lens amplification factor is 1/5~1/3.
Application method explanation：
Close-coupled whole audience rainbow measuring probe shares 3 kinds of operating modes, is followed successively by light path leveling pattern, determines measurement point mould
Formula, formal measurement pattern.
Under light path leveling pattern, rotary regulator 3 is adjusted, allows it to tilt reflective mirror and rotates to the tapping of trepanning partition board 4
(measuring at optical axis), adjusts by external leveling laser and intersects, light path is allowed to be in same plane.
It determines and measures under dot pattern, adjust rotary regulator 3, its LED light is allowed to rotate to the tapping of trepanning partition board 4, warp
It crosses external leveling laser to adjust, allows measurement point position at the focal length of front lens 1, determine measurement point.
Under formal measurement pattern, rotary regulator 3 is adjusted, sizeable aperture diaphragm is allowed to rotate to trepanning partition board 4
Tapping.
External laser beam is refracted into drop internal (drop is located at the preceding replaceable focal length of lens), and by primary
The light beam reflected again after internal reflection is interfered to form interference fringe (single order rainbow), be received by front lens 1, interior len 2
Collection；Measured zone size may be selected in aperture diaphragm at rotary regulator 3, and filters out space interference light.With Varifocal zoom lens
CCD camera 5 pass through and adjust zoom lens and clear interference fringe rainbow figure occur to CCD.The subsequent power interfaces of CCD are CCD
Power supply, rainbow figure is real-time transmitted in terminal and is further processed by data transmission interface, using relevant processing software,
It can be obtained the information such as size droplet diameter, refractive index, temperature (component).
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of close-coupled whole audience rainbow measuring probe, including light path system and CCD camera；It is characterized in that, the light path system
System includes front lens, interior len, rotary regulator and the trepanning partition board being sequentially arranged along light path, and the position relationship of each component is：
Front lens and interior len are smaller than the focal length of the two lens, and ensure that the equivalent image space focal plane of the two lens is located at
Between interior len and interior len focal plane；Rotary regulator is located in interior len image space focal plane, and center passes through screw
It is fixed on trepanning partition board and can be rotated around center；Zoom lens is housed, lens parameters enable CCD camera to remember in CCD camera
Record front lens and the clear rainbow images at the equivalent image space focal plane of interior len.
2. close-coupled whole audience rainbow measuring probe according to claim 1, which is characterized in that the light path system and CCD
Camera is mounted in columnar main casing, and the both ends of main casing set dismountable head cover；The front lens, is opened interior len
Hole partition board is screwed on a main housing, and CCD camera realizes fixation by fixing filling block.
3. close-coupled whole audience rainbow measuring probe according to claim 2, which is characterized in that the inside of the main casing is also
Dress sets that there are one side openings to be opened/closed there are one leveling reflective mirror on its opposite main casing.
4. close-coupled whole audience rainbow measuring probe according to claim 2, which is characterized in that in the varifocal mirror of CCD camera
On the main casing at head place, if there are one be used to replace camera lens to be opened and closed side door.
5. the close-coupled whole audience rainbow measuring probe according to Claims 1-4 any one, which is characterized in that described
Rotary regulator by 4 aperture diaphragms, one tilt reflective mirror and a paster LED lamp group at；The aperture of the aperture diaphragm
It is 2mm, 4mm, 10mm, 20mm respectively, the inclination angle for tilting reflective mirror is fixed, and paster LED lamp is 0.5W, by 3V button electricity
Pond powers, and is equipped with Micro-touch switch.
6. the close-coupled whole audience rainbow measuring probe according to Claims 1-4 any one, which is characterized in that described
CCD camera with zoom lens, CCD chip be frame frequency and time for exposure adjustable linear CCD, pixel coverage be 1~
16M, highest frequency 30Hz, ranging from 10~20 ° of detection rainbow angle attachment, angle of minimum resolution is 0.002 °, and zoom lens is put
Big multiple is 1/5~1/3.
7. the close-coupled whole audience rainbow measuring probe according to Claims 1-4 any one, which is characterized in that described
Front lens is interchangeable, a diameter of 100mm, and replaceable focal range is 100mm~500mm；The interior len is a diameter of
100mm, focal length 160mm.
8. the close-coupled whole audience rainbow measuring probe according to claim 2 to 4 any one, which is characterized in that in place
In on the head cover of CCD camera side, it is equipped with power interface and data transmission interface trepanning.
9. the close-coupled whole audience rainbow measuring probe according to claim 2 to 4 any one, which is characterized in that described
Main casing is columnar structured made of metal material.
10. the close-coupled whole audience rainbow measuring probe according to claim 2 to 4 any one, which is characterized in that revolving
Turn on the main casing at adjuster position, if there are one opening, the outer rim of rotary regulator is stretched out opening and adjusted for rotation.
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| CN201610405658.XA CN106124369B (en) | 2016-06-08 | 2016-06-08 | A kind of close-coupled whole audience rainbow measuring probe |
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| CN201610405658.XA CN106124369B (en) | 2016-06-08 | 2016-06-08 | A kind of close-coupled whole audience rainbow measuring probe |
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| CN108414408B (en) * | 2018-03-21 | 2024-02-20 | 浙江大学 | Coaxial full-field rainbow liquid drop measuring probe with compact structure |
| CN114112994B (en) * | 2021-11-29 | 2023-10-20 | 广东电网有限责任公司广州供电局 | Portable refractive index measuring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003936A (en) * | 2010-09-14 | 2011-04-06 | 浙江大学 | Method and device for simultaneously measuring droplet position, particle sizes and complex refractive index |
| CN103698256A (en) * | 2013-12-25 | 2014-04-02 | 浙江大学 | Method and device for on-line measurement of liquid spraying through full-field rainbow |
| CN103842797A (en) * | 2013-05-10 | 2014-06-04 | 浙江大学 | One-dimensional full-field rainbow measurement device and measurement method |
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| EP1864180A2 (en) * | 2005-03-01 | 2007-12-12 | Cornell Research Foundation, Inc. | Simultaneous spatial and temporal focusing of femtosecond pulses |
| ITRM20110415A1 (en) * | 2011-08-01 | 2013-02-02 | Consiglio Nazionale Ricerche | OPTOELECTRONIC DEVICE OF THREE-DIMENSIONAL DIGITAL MICROSCOPY |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003936A (en) * | 2010-09-14 | 2011-04-06 | 浙江大学 | Method and device for simultaneously measuring droplet position, particle sizes and complex refractive index |
| CN103842797A (en) * | 2013-05-10 | 2014-06-04 | 浙江大学 | One-dimensional full-field rainbow measurement device and measurement method |
| CN103698256A (en) * | 2013-12-25 | 2014-04-02 | 浙江大学 | Method and device for on-line measurement of liquid spraying through full-field rainbow |
Non-Patent Citations (1)
| Title |
|---|
| 全场彩虹技术测量喷雾浓度及粒径分布;吴迎春 等;《物理学报》;20130930;第62卷(第9期);1-8 * |
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