CN106124369A - 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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- CN106124369A CN106124369A CN201610405658.XA CN201610405658A CN106124369A CN 106124369 A CN106124369 A CN 106124369A CN 201610405658 A CN201610405658 A CN 201610405658A CN 106124369 A CN106124369 A CN 106124369A
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- lens
- whole audience
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- measuring probe
- ccd camera
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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, e.g. by light scattering, diffraction, holography or imaging
Abstract
The present invention relates to whole audience rainbow measurement technology, it is desirable to provide a kind of close-coupled whole audience rainbow measuring probe.This probe includes frontal lens, interior lens, rotary actuator and the perforate dividing plate being sequentially arranged along light path；Frontal lens and the focal length being smaller than the two lens of interior lens, and ensure that the equivalent image space focal plane of the two lens is between interior lens and interior lens focal plane；Rotary actuator is positioned on lens image space focal plane, and its center is fixed on perforate dividing plate and can be around central rotation；Equipped with zoom lens in CCD camera, the clear rainbow images at frontal lens and interior lens equivalent image space focal plane can be recorded.The present invention utilizes whole audience rainbow commercial measurement principle, can change operating distance by double lens, and band zoom lens CCD camera greatly reduces system length, it is simple to promotes 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, it is simple to carries in engineering reality and applies.
Description
Technical field
The present invention relates to whole audience rainbow measurement technology, particularly relate to a kind of based on double lens and band zoom lens CCD
Camera measures the distribution of spray droplet particle diameter, refractive index, the rainbow of temperature (or component) isoparametric close-coupled adjustable working distance
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, the most effectively and accurately measures that the multiparameter of spray droplet in complicated spray field 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., deposit
Be easily destroyed original flow field, cannot go deep into spray field internal measurement, cannot the shortcoming such as measurement in real time, and be not suitable with current
Measurement demand during high-precision real.The advanced measuring method of non-interfering type then breaches above-mentioned restriction, have do not disturb original
Flow field, precision is high, measure scope extensively, the advantage such as the rapidest.
According to measuring classification of type, the common methods measuring spray field size droplet diameter has: light scattering method, laser-induced fluorescence (LIF)
Method, Digital Holography, laser interference particle imaging technique (ILIDS), phase-Doppler particle analyzer (PDA)；Measure spray droplet
The common methods of refractive index has: V-arrangement prism method, glancing incidence method (Abbe refractometer), interference fringe (Newton's ring) method；Measure spraying
The measuring method of drop grain temperature mainly has fluorescence method；Measure the common method of spray field concentration to have: false-color method, shadowing method,
Chromatography imaging technique (CT).Wherein phase-Doppler particle analyzer, light scattering method belong to single-point measurement method, measure also known as zero dimension；Grain
Subimage 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 that one can measure the parameter 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 ultimate 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
Interfere mutually and form light and dark striped (referred to as single order rainbow)；Separately there is part light directly to be reflected by drop outer surface, reflect light
And interfere between the emergent light of an internal reflection, form the ripple (referred to as ripple structure) of a series of high frequency oscillation
Attached it is stacked on single order rainbow.Owing to single order rainbow contains required metrical information, and multiple high frequency bar in rainbow signal
Certainty of measurement can be impacted by stricture of vagina, it is therefore desirable to image filtering goes high frequency oscillation structure form smooth rainbow signal.Entirely
Field rainbow technology is then by prolonging exposure time and to expand clear aperature, records thousands of and has certain grain size distribution
The rainbow of drop, owing to the scattered light of multiple granules is overlapped mutually, the high frequency ripple letter being attached on individual particle single order rainbow
Number it is eliminated, rainbow signal can be smoothed；Sensitivity to non-spherical droplets is the highest simultaneously, therefore spherical to spray field drop
Degree no requirement (NR), and then the parameter such as the particle diameter of inverting spray liquid grain and distribution, mean refractive index, mean temperature.Whole audience rainbow technology
For liquid spray field measurement field in biphase gas and liquid flow provide a kind of noncontact, multiparameter, in high precision, real-time online measuring.
Although whole audience rainbow measurement commercial measurement is thousands of drops, but still belongs to single-point and determine operating distance survey
Amount.In actual application, need the diverse location of liquid spray field is measured.But the survey allowed as spray field in fixing container
Amount position is unique and fixing, and in laboratory, whole audience rainbow technological system entire length is long.These are all unfavorable in work
Rapid Popularization in Cheng Shiji and application.
To this end, close-coupled whole audience rainbow measurement apparatus of the present invention utilizes whole audience rainbow commercial measurement principle, pass through
Double lens can change operating distance, and band zoom lens CCD camera is as image recorder very big reduction system length, it is simple to push away
Wide and practical application in industry, can realize good spray field measurement effect.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, it is provided that a kind of close-coupled whole audience rainbow is surveyed
Amount probe.This probe variable-operation range measurement, single unit system is small and exquisite, be easy in engineering reality carry and apply.
For solving technical problem, the technical solution used in the present invention is:
There is provided a kind of close-coupled whole audience rainbow measuring probe, including light path system and CCD camera；Described light path system includes
Frontal lens, interior lens, rotary actuator and the perforate dividing plate being sequentially arranged along light path, the position relationship of each parts is: frontal lens
With the focal length being smaller than the two lens of interior lens, and ensure that the equivalent image space focal plane of the two lens is positioned at lens
And between interior lens focal plane；Rotary actuator is positioned on lens image space focal plane, and its center is fixed by screws in
On perforate dividing plate and can be around central rotation；Equipped with zoom lens in CCD camera, its lens parameters is saturating before making CCD camera to record
Clear rainbow images at mirror and interior lens equivalent image space focal plane.
In the present invention, described light path system and CCD camera are mounted in columnar main casing, and the two ends of main casing set
Dismountable top cover；Described frontal lens, interior lens, perforate dividing plate are screwed on a main housing, and CCD camera is by fixing filling
Block realizes fixing.
In the present invention, the inner side of described main casing is also equipped with a leveling illuminator, its to main casing on be provided with
One side opening to be opened/closed.
In the present invention, on the main casing at the zoom lens of CCD camera, being provided with one can opening and closing for change camera lens
Side door.
In the present invention, described rotary actuator is by 4 aperture diaphragms, an inclination illuminator and a paster LED lamp group
Become；The aperture of described aperture diaphragm is 2mm, 4mm, 10mm, 20mm respectively, and the inclination angle tilting illuminator is fixing, paster
LED is 0.5W, 3V button cell power, and be provided with Micro-touch switch.
In the present invention, the described CCD camera with zoom lens, its CCD chip is frame frequency and the adjustable line of time of exposure
Property CCD, pixel coverage is 1～16M, and highest frequency is 30Hz, and detection rainbow angle adnexa scope is 10～20 °, angle of minimum resolution
Being 0.002 °, zoom lens amplification is 1/5～1/3.
In the present invention, on the top cover being positioned at CCD camera side, it is provided with power interface and data transmission interface perforate.
In the present invention, described frontal lens is interchangeable, its a diameter of 100mm, replaceable focal range be 100mm～
500mm；Described interior lens diameter is 100mm, and focal length is 160mm.
In the present invention, described containment vessel is the cylindrical structure that metal material is made.
In the present invention, on the main casing of rotary actuator position, being provided with an opening, the outer rim of rotary actuator is stretched
Go out opening for rotating regulation.
Compared with prior art, the beneficial effects of the present invention is:
1, the close-coupled whole audience rainbow measuring probe of the present invention make use of whole audience rainbow commercial measurement principle, passes through double lens
Can change operating distance, band zoom lens CCD camera is as image recorder very big reduction system length, it is simple to promote and real
Border commercial Application, can realize good spray field measurement effect.
2, the probe variable-operation range measurement of the present invention, single unit system is small and exquisite, it is simple to carries in engineering reality and applies.
Accompanying drawing explanation
Fig. 1 close-coupled whole audience rainbow measuring probe index path；
Fig. 2 close-coupled whole audience rainbow measuring probe STRUCTURE DECOMPOSITION figure.
1. frontal lens in figure；2. lens in；3. rotary actuator；4. perforate dividing plate；5.CCD camera；6. fix filling block；
7. back header；8. pretectum；9. side opening；10. leveling illuminator；11. screws；12. main casings.
Detailed description of the invention
The most further describe in detail:
Close-coupled whole audience rainbow measuring probe in the present invention, including light path system and CCD camera 5；Described light path system
Including the frontal lens 1 being sequentially arranged along light path, interior lens 2, rotary actuator 3 and perforate dividing plate 4, the position relationship of each parts
For: frontal lens 1 and the focal length being smaller than the two lens of interior lens 2, and ensure that equivalent image space Jiao of the two lens puts down
Face is between interior lens 2 and the focal plane of interior lens 2；Rotary actuator 3 is positioned on lens 2 image space focal plane, its center
Position is fixed by screws on perforate dividing plate 4 and can be around central rotation；Equipped with zoom lens in CCD camera 5, its lens parameters
Make CCD camera 5 can record the clear rainbow images at frontal lens 1 image space focal plane equivalent with interior lens 2；
Described light path system and CCD camera 5 are mounted on metal material and make in columnar main casing 12, main casing 12
Two ends set dismountable pretectum 8 and back header 7, pretectum 7, back header 8 are fixed on main casing 12 by screw 11.Before
Lens 1, interior lens 2, perforate dividing plate 4 screw 11 (in the present invention, screw 11 has multiple) respectively is fixed on main casing 12,
CCD camera 5 realizes fixing with zoom lens and by fixing filling block 6.
Be also equipped with a leveling illuminator 10 in the inner side of main casing 12, its to main casing 12 on be provided with one can
The side opening 9 of opening and closing.Leveling illuminator 10 is under leveling pattern, and regulation light path is to level, it is ensured that the central shaft of probe is with sharp
Light is in same level.Side opening 9 light path leveling pattern, determine measurement dot pattern under be open state, formally measuring mould
It is closed configuration under formula.
On main casing 12 at the camera lens of CCD camera 5, being provided with one can opening and closing side door for change camera lens.In place
On the back header 7 of CCD camera 5 side, it is provided with power interface and data transmission interface perforate.In rotary actuator 3 position
Main casing 12 on, be provided with an opening, the outer rim of rotary actuator 3 stretch out opening for rotate regulation to different operating mould
Formula.
Frontal lens 1 is interchangeable, its a diameter of 100mm, and replaceable focal range is 100mm～500mm；Described interior
The a diameter of 100mm of mirror, focal length is 160mm.Rotary actuator 3 is tilted illuminator, a paster by 4 aperture diaphragms and one
LED forms；The aperture of aperture diaphragm is 2mm, 4mm, 10mm, 20mm respectively, and the inclination angle tilting illuminator is fixing, patch
Sheet LED is 0.5W, 3V button cell power, and be provided 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, and highest frequency is 30Hz, and detection rainbow angle adnexa scope is 10～20 °,
Angle of minimum resolution is 0.002 °, and zoom lens amplification is 1/5～1/3.
Using method illustrates:
Close-coupled whole audience rainbow measuring probe has 3 kinds of mode of operations, is followed successively by light path leveling pattern, determines measurement point mould
Formula, formal measurement pattern.
Under light path leveling pattern, regulate rotary actuator 3, allow it tilt illuminator and rotate the tapping to perforate dividing plate 4
(measuring at optical axis), intersects through the regulation of external leveling laser, allows light path be in same plane.
Determine under measurement dot pattern, regulate rotary actuator 3, allow its LED rotate the tapping to perforate dividing plate 4, warp
Cross the regulation of external leveling laser, allow measurement point be positioned at the focal length of frontal lens 1, determine measurement point.
Under formal measurement pattern, regulate rotary actuator 3, allow sizeable aperture diaphragm rotate to perforate dividing plate 4
Tapping.
External laser beam is refracted into drop internal (this drop is positioned at the front replaceable focal length of lens), and through once
Again the light beam reflected after internal reflection, interferes formation interference fringe (single order rainbow), frontal lens 1, interior lens 2 receives
Collection；Aperture diaphragm at rotary actuator 3 may select measured zone size, and filters spatial interference light.With Varifocal zoom lens
CCD camera 5 by regulation zoom lens to CCD occur clear interference fringe rainbow figure.CCD power interface below is CCD
Power supply, rainbow figure is real-time transmitted in terminal process further by data transmission interface, utilizes relevant process software,
I.e. can get 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, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a close-coupled whole audience rainbow measuring probe, including light path system and CCD camera；It is characterized in that, described light path system
System includes frontal lens, interior lens, rotary actuator and the perforate dividing plate being sequentially arranged along light path, and the position relationship of each parts is:
Frontal lens and the focal length being smaller than the two lens of interior lens, and ensure that the equivalent image space focal plane of the two lens is positioned at
Between interior lens and interior lens focal plane；Rotary actuator is positioned on lens image space focal plane, and screw is passed through in its center
It is fixed on perforate dividing plate and can be around central rotation；Equipped with zoom lens in CCD camera, its lens parameters makes CCD camera to remember
Clear rainbow images at record frontal lens and interior lens equivalent image space focal plane.
Close-coupled whole audience rainbow measuring probe the most according to claim 1, it is characterised in that described light path system and CCD
Camera is mounted in columnar main casing, and the two ends of main casing set dismountable top cover；Described frontal lens, interior lens, open
Hole dividing plate is screwed on a main housing, and CCD camera is realized fixing by fixing filling block.
Close-coupled whole audience rainbow measuring probe the most according to claim 2, it is characterised in that the inner side of described main casing is also
Equipped with a leveling illuminator, its to main casing on be provided with a side opening to be opened/closed.
Close-coupled whole audience rainbow measuring probe the most according to claim 2, it is characterised in that at the varifocal mirror of CCD camera
On main casing at Tou, being provided with one can opening and closing side door for change camera lens.
5. according to the close-coupled whole audience rainbow measuring probe described in Claims 1-4 any one, it is characterised in that described
Rotary actuator is made up of 4 aperture diaphragms, an inclination illuminator and a paster LED lamp；The aperture of described aperture diaphragm
Being 2mm, 4mm, 10mm, 20mm respectively, the inclination angle tilting illuminator is fixing, and paster LED lamp is 0.5W, by 3V button electricity
Pond powers, and is provided with Micro-touch switch.
6. according to the close-coupled whole audience rainbow measuring probe described in Claims 1-4 any one, it is characterised in that described
With the CCD camera of zoom lens, its CCD chip is frame frequency and the adjustable linear CCD of time of exposure, pixel coverage be 1～
16M, highest frequency is 30Hz, and detection rainbow angle adnexa scope is 10～20 °, and angle of minimum resolution is 0.002 °, and zoom lens is put
Big multiple is 1/5～1/3.
7. according to the close-coupled whole audience rainbow measuring probe described in Claims 1-4 any one, it is characterised in that described
Frontal lens is interchangeable, its a diameter of 100mm, and replaceable focal range is 100mm～500mm；Described interior lens diameter is
100mm, focal length is 160mm.
8. according to the close-coupled whole audience rainbow measuring probe described in claim 2 to 4 any one, it is characterised in that in place
On the top cover of CCD camera side, it is provided with power interface and data transmission interface perforate.
9. according to the close-coupled whole audience rainbow measuring probe described in claim 2 to 4 any one, it is characterised in that described
Containment vessel is the cylindrical structure that metal material is made.
10. according to the close-coupled whole audience rainbow measuring probe described in claim 2 to 4 any one, it is characterised in that in rotation
Turning on the main casing of actuator position, be provided with an opening, the outer rim of rotary actuator stretches out opening for rotating regulation.
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| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405658.XA CN106124369B (en) | 2016-06-08 | 2016-06-08 | A kind of close-coupled whole audience rainbow measuring probe |
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| CN106124369A true CN106124369A (en) | 2016-11-16 |
| CN106124369B CN106124369B (en) | 2018-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414408A (en) * | 2018-03-21 | 2018-08-17 | 浙江大学 | A kind of compact-sized coaxial-type whole audience rainbow drop measurement probe |
| CN114112994A (en) * | 2021-11-29 | 2022-03-01 | 广东电网有限责任公司广州供电局 | Portable refractive index measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414408A (en) * | 2018-03-21 | 2018-08-17 | 浙江大学 | A kind of compact-sized coaxial-type whole audience rainbow drop measurement probe |
| CN108414408B (en) * | 2018-03-21 | 2024-02-20 | 浙江大学 | Coaxial full-field rainbow liquid drop measuring probe with compact structure |
| CN114112994A (en) * | 2021-11-29 | 2022-03-01 | 广东电网有限责任公司广州供电局 | Portable refractive index measuring device |
| 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 |
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