CN106769709A - A kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature - Google Patents
A kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature Download PDFInfo
- Publication number
- CN106769709A CN106769709A CN201611123394.5A CN201611123394A CN106769709A CN 106769709 A CN106769709 A CN 106769709A CN 201611123394 A CN201611123394 A CN 201611123394A CN 106769709 A CN106769709 A CN 106769709A
- Authority
- CN
- China
- Prior art keywords
- polarization
- degree
- scattering
- light
- particulate matter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000010287 polarization Effects 0.000 title claims abstract description 99
- 239000013618 particulate matter Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 26
- 241000229375 Palaemon Species 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 41
- 239000013598 vector Substances 0.000 claims abstract description 13
- 238000004458 analytical method Methods 0.000 claims abstract description 8
- 238000002356 laser light scattering Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 42
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 16
- 239000010408 film Substances 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- UYLYBEXRJGPQSH-UHFFFAOYSA-N sodium;oxido(dioxo)niobium Chemical compound [Na+].[O-][Nb](=O)=O UYLYBEXRJGPQSH-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- CGMRCMMOCQYHAD-UHFFFAOYSA-J dicalcium hydroxide phosphate Chemical compound [OH-].[Ca++].[Ca++].[O-]P([O-])([O-])=O CGMRCMMOCQYHAD-UHFFFAOYSA-J 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000006101 laboratory sample Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011192 particle characterization Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000000711 polarimetry Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001370 static light scattering Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- 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
- G01N15/0211—Investigating a scatter or diffraction pattern
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature, the method is comprised the following steps：Present granule thing is detected to the scattering light after laser light scattering, wherein being measured to the scattering polarization light under the specific scattering angle θ in the range of 70 110 degree；Extract the channel of polarization voltage of scattering light, calculate the Stokes vectors of scattering light, element a2 (θ), b1 (θ), a1 (θ), the b1 (θ) in Mueller matrixes M are obtained according to Stokes vectors, and by element a2 (θ), b1 (θ), a1 (θ), b1 (θ) calculating, obtain characteristic polarization parameter K2；Value analysis and determination particulate matter form according to K2.The present invention is simple and quick, and measurement range is wide, and limitation is small, reduces the quantity of detector, reduces cost.
Description
Technical field
The present invention relates to particulate matter detection technique field, particularly a kind of particulate matter form based on polarization scattering feature is surveyed
Amount method and apparatus.Way of reference is incorporated to this to the content of the earlier patent application publication number CN104089855A of applicant in full
Text.
Background technology
There is important function to particle characterization in cell classification, atmospheric optics and marine optics field in morphological analysis.For
Isotropism spheroid, Mie theories have been presented for scattering the detailed description of Muller matrix, but for cylinder or anisotropy
Globoid particle, Mie is theoretical to lack effective calculating.In recent years, some the Theory Constructions random uneven grain scattering
Solution, the element of the Muller matrix of scattering object can be used to characterize the shape (see formula (1)) of scattering object.It is found that public
A2/a1 can describe the shape of particulate matter in formula (1), but theoretical and experiment be inaccurate with it is satisfactory.
The content of the invention
The technical problems to be solved by the invention are exactly to overcome existing optical scatter object light property analysis method
Deficiency, there is provided a kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature.
To achieve the above object, the present invention uses following technical scheme：
A kind of particulate matter method for measuring shape of palaemon based on polarization scattering feature, comprises the following steps：
Particulate matter is detected to the scattering light after laser light scattering, wherein under the specific scattering angle θ in the range of 70-110 degree
Scattering polarization light measure；
The channel of polarization voltage of scattering light is extracted, the Stokes vectors of scattering light are calculated, is obtained according to Stokes vectors
Matrix element a2 (θ), b1 (θ) in Mueller matrixes M, a1 (θ), b1 (θ), and by element a2 (θ), b1 (θ), a1
The calculating of (θ), b1 (θ), obtains characteristic polarization parameter K2：
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ))；
Value analysis and determination particulate matter form according to K2.
Further：
The specific scattering angle θ is 85 degree.
The channel of polarization includes 0 degree of channel of polarization and 90 degree of channel of polarization.
The channel of polarization includes symmetrically arranged two 0 degree of channel of polarization and two 90 degree of channel of polarization.
Value according to K2 characterizes the specificity of particulate matter shape attribute divides into ball, post, ellipsoid.
The use of light source is the He-Ne lasers of output wavelength 632.8nm power outputs 75mW, by particle diameter in 100-300nm
Particulate matter with the flow velocity of 0.7L/min by measurement zone, and light scattered to it detect.
A kind of measurement apparatus for described particulate matter method for measuring shape of palaemon, including laser, diaphragm, linear polarization
Piece, one point of multi fiber beam, measurement optical cavity, nozzle and detector, one point of multi fiber beam are arranged in the range of 70-110 degree
On specific scattering angle, and polarization film is equipped with fibre bundle front end to form the channel of polarization of scattering light, preferably 0 degree partially
Shake passage and 90 degree of channel of polarization, the light that the laser sends is specific by being modulated to by the linear polarizer after diaphragm
Polarization state, by it is described measurement optical cavity during through the nozzle spray particulate matter scatter after, scattering polarization light passes through
One point of multi fiber beam enters the channel of polarization of scattering light, then is detected by the detector.
Further：
The specific scattering angle is 85 degree.
One point of multi fiber beam is one-to-two fibre bundle, and 0 degree of channel of polarization is formed on the one-to-two fibre bundle
With 90 degree of channel of polarization, or one point of multi fiber beam be one point of four fibre bundle, on one point of four fibre bundle formed
Symmetrically arranged two 0 degree of channel of polarization and two 90 degree of channel of polarization.
The specific polarization state is 0 degree of polarization state.
Beneficial effects of the present invention：
Measuring method proposed by the present invention can be based on the shape of the polarization scattering Characteristics Detection particulate matter of light, such as three kinds
Typical shape --- ball, ellipsoid and post.The form of particulate matter is not only reflected in scattering strength in variable grain thing scattering process,
More can sensitively polarisation-affecting optical signature, it is right that the measurement pattern of polarization scattering can effectively reduce traditional light scattering component analysis
The requirement of angle and wavelength information.The present invention inherits light scattering method compared with other method low costs, simple and quick, measures model
Enclose wide, the small advantage of limitation；On this basis, the quantity of detector is reduced again, cost is reduce further, and simplifies survey
Amount instrument structure.
Brief description of the drawings
A kind of Fig. 1 particulate matter configuration measurement mechanism schematic diagrames of embodiment of the present invention based on polarization scattering feature；
The schematic diagram of the one-to-two fibre bundle of Fig. 2 an embodiment of the present invention；
Fig. 3 assembles the front view of the local G of polarization film for the fibre bundle shown in Fig. 2；
A kind of Fig. 4 particulate matter method for measuring shape of palaemon flow charts of embodiment of the present invention based on polarization scattering feature；
Fig. 5 represents that three kinds of different shape particulate matters scatter angular measurement and obtain in 0 degree of linearly polarized photon incident scatter at 85 degree
K2 values.
Specific embodiment
Embodiments of the present invention are elaborated below.It is emphasized that what the description below was merely exemplary,
Rather than in order to limit the scope of the present invention and its application.
Refering to Fig. 1 to Fig. 4, in one embodiment, a kind of particulate matter method for measuring shape of palaemon based on polarization scattering feature,
Comprise the following steps：
Particulate matter is detected to the scattering light after laser light scattering, wherein under the specific scattering angle θ in the range of 70-110 degree
Scattering polarization light measure；
The channel of polarization voltage of scattering light is extracted, the Stokes vectors of scattering light are calculated, is obtained according to Stokes vectors
Matrix element a2 (θ), b1 (θ) in Mueller matrixes M, a1 (θ), b1 (θ), and by element a2 (θ), b1 (θ), a1
The calculating of (θ), b1 (θ), obtains characteristic polarization parameter K2：
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ))；
Value analysis and determination particulate matter form according to K2.
Refering to Fig. 1 to Fig. 4, in another embodiment, a kind of measurement for described particulate matter method for measuring shape of palaemon
Device, including laser LASER, diaphragm A, linear polarizer P, one point of multi fiber beam fb, measurement optical cavity MC, nozzle JET and spy
Device is surveyed, one point of multi fiber beam is arranged on the specific scattering angle in the range of 70-110 degree, and in the assembling of fibre bundle front end
There is polarization film to form the channel of polarization of scattering light, preferably 0 degree channel of polarization and 90 degree of channel of polarization, the laser hair
The light for going out is modulated to specific polarization state by after diaphragm by the linear polarizer, during by the measurement optical cavity
After the particulate matter sprayed through the nozzle is scattered, scattering polarization light is led to by the polarization that one point of multi fiber beam enters scattering light
Road, then detected by the detector.
Particulate matter method for measuring shape of palaemon according to embodiments of the present invention, the first step：Using lower of polarimetry special angle
The scattering polarization light of grain thing is measured；Second step：The channel of polarization voltage of scattering light is extracted, Stokes components are calculated, obtained
Element in Muller matrix, is that can obtain characteristic polarization parameter K2 by the computing to Muller matrix element.
Its principle is, using Mie scattering theories, expression can be set up by the scattering light to incident polarised light and analyzing
The Stokes vectors of its light intensity and polarization state, can obtain scattering object Muller matrix.Wherein, Mueller matrixes and Stokes are sweared
The mathematical expression form of amount is respectively following formula (1) and (2)：
Sout=MSin (2)
In above formula (2), SinRepresent the Stokes vectors of incident light, SoutRepresent the Stokes vectors of emergent light.Stokes is sweared
I in amount represents the overall strength or 0 ° and 90 ° of light intensity sums of light；Q represents the 0 ° and 90 ° difference of light intensity；U represents 0 ° and 90 ° of light intensity
Difference；It is total light intensity that V represents dextrorotation and the strong poor I of left-handed rotatory polarization, therefore in addition to resolving into 0 ° and 90 ° of light intensity sums,
Can also be write as 0 ° and -0 ° or left-handed and dextrorotation light intensity sum.Q represents that detection light is changed into the tendency of 0 ° or 90 °, if Q>0
Show that emergent light is easier to become 0 ° of polarization direction.U represents that detection light is changed into the tendency of 0 ° or -0 °, if U>0 emergent light more holds
It is variable into 0 ° of polarization direction.V represents that detection light is changed into the tendency of dextrorotation or Left-hand circular polarization, if V>0 emergent light is easier to become
Into right-hand circular polarization.We directly obtain the polarization parameter that the present invention is provided using the element of Muller matrix using following formula (3)
K2：
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ)) (3)
Inventor has found that the stokes vectors after measuring scattering obtain scattering the K2 of light, with K2 to particulate matter shape
The specificity of attribute is characterized and can distinguish ball, post, ellipsoid, and inventor also found, K2 is influenceed by particulate matter variations in refractive index
It is smaller, and characterized with the specificity in the case of small particle.
Polarization parameter shows differential responses to variable grain thing composition, and this sign of polarization parameter is subject in length
Short axle than scope have in 1.7-4.7 substantially sign, and under compared with small particle (particle diameter is in 100-300nm) not with the change of particle diameter
Change and great change occurs.Can make particulate matter with certain speed by measurement zone by designing gas circuit, but particulate matter dispersion
Property decisive role played to measurement, the dispersion for measuring preparatory stage sample is one of crucial step.In 85 degree of angle of measurement
Under obtain scatter light polarization parameter, treatment is carried out to measurement signal and calculates identification, so as to obtain sign particulate matter shape polarization ginseng
The value of amount.
When using, first to system calibration, signal acquiring system is adjusted, eliminate backscatter luminous intensity, and eliminate other
Electromagnetic interference, it is ensured that the accuracy of the data for collecting.Dispersion dehumidifying is carried out to sample, (can in the present invention using organic solvent
Using absolute ethyl alcohol) and ultrasonic case homogeneous is disperseed to sample.Then the laboratory sample for preparing is pumped into measurement by air pump again
In chamber, drying tube and 40 degrees Celsius of injection ports ensure solvent volatilization.To ensure that sample can be transported by perpendicular to the direction of optical path
OK, the nozzle at processing sample entrance port, allows air-flow to attenuate, and the air-flow for being tapered sample passes through measurement zone.Finally by photoelectricity
Multiplication is in control scattered light intensity, and measurement data is stored by capture card and data storage device, is finally calculated polarization parameter
Distinguish different shape particulate matter.
Specific measuring process is as follows：
The first step, system calibration, optical element and measurement chamber be all placed on on laser optical path straight line, polarizer,
Diaphragm surface and laser vertical, it is to avoid inclining causes to obtain inaccurate polarization state and on-plane surface light.
Second step, the sample of preparation is drawn into measurement chamber by air pump, the polarizer direction of incidence end be 0 degree (with
Laboratory coordinate is referential), 85 degree of receiving terminal polarizers are realized using one-to-two fibre bundle, diagonal at fibre bundle set end
The polarizing coating of equidirectional is assembled before the fibre bundle of line, direction is respectively 0 degree and 90 degree, can so obtain scattering light 0 simultaneously
Degree and 90 degree of voltage pulse values of channel of polarization.
3rd step, measurement has obtained electric pulse of the particulate matter under four channel of polarization, using certain Filtering system and arteries and veins
Punching treatment obtains corresponding Q component and I component, is calculated K2 values, and sign is analyzed to carbon black pellet thing.
The present invention will be described in detail by example below.
Measuring system：This measuring system is the He-Ne laser of output wavelength 632.8nm power outputs 75mW using light source
Device, green glow passes through.
Example one：
Sample：Polystyrene microsphere (200nm, refractive index 1.59), hydroxyapatite (ellipsoid, etc. small particle 200nm, folding
Penetrate rate 1.64), sodium niobate (threadiness, 100nm, refractive index 2.2).
Differentiate step：
(1) with the flow velocity of 0.7L/min by measurement zone, dust dispersion quality is sucked and disperseed particulate matter for 1g sample negative pressure
In the casing of 10 × 10 × 10cm, measurement zone is then entered into by nozzle again.Pair determine incident polarization photo measure obtain
The 0 degree and 90 degree magnitude of voltage of passage after scattering, have chosen the Stokes vector analyses of 85 degree of scattering angle here..
(2) magnitude of voltage for measuring is processed and is screened, to standard compliant pulse integration, by 0 degree of passage and 90 degree
Path computation obtains Q component and I component obtains K2.
(3) be ensure experiment reliability, once test a sample for component is carried out more than ten times effectively test, it is right
Each experimental calculation obtains result, then calculates average values and variance of the K2 under each component, the reliability of confirmatory experiment.
Fig. 5 represents that three kinds of different shape particulate matters used by example one dissipate in 0 degree of linearly polarized photon incident scatter at 85 degree
The K2 values that firing angle measurement is obtained.Wherein transverse axis is three kinds of different particulate matters, is respectively from left to right polystyrene microsphere, hydroxyl
Apatite, sodium niobate, blue cylindricality calculated value, brown cylindricality correspondence laboratory mean values, vertical line represents experimental standard variance.
Experiment and theoretical value are very close to and numerical value difference is obvious from each other, shows that K2 is characterized to the specificity of particulate matter form.
Because photomultiplier is extremely sensitive to light, if somewhat light leak will result in measurement greatly misalignment, so surveying
Amount does Darkening process in chamber, and as far as possible coarse, allows veiling glare to be absorbed or be reflected by cavity, in not reaching fibre bundle, while
Increase by 85 degree of Measurement channels, reduce the reception that other angles scatter light.Under measured result, when laser is only opened, photomultiplier
Receiving voltage in 20mv levels, measure in 1v levels, therefore background noise and veiling glare are controlled well.
To ensure the particle concentration under the true surrounding environment of sample simulation, sample is diluted, and is measured entering
Ensure that concentration is lower during chamber, so nozzle does downsizing treatment；To one point of four fibre bundle of assembling and polarization pad pasting, design special
Part fixes fibre bundle and polarization pad pasting, and Fig. 2 is fibre bundle trim designs, and one point of four fibre bundle is fixed on a cylinder in Fig. 2
In, it is fixed with pin, polarization pad pasting is placed in draw-in groove, is compressed with screw, it is ensured that polarization direction is relative solid with fibre bundle
It is fixed, finally it is assembled on measurement chamber entirely through outer nut.
Theoretical calculation is verified for PM2.5 even small particles as PM1, lateral scattering polarization light enough I
Extract data and analyze data, this reduces the dependence to angle compared with common scattering method.
System architecture such as Fig. 1, wherein, light source is He-Ne lasers LASER (output wavelength 6328nm power outputs
75mW), A represents diaphragm, and P represents linear polarizer (THORLABS, QSA, extinction ratio 20000：1), fb represents one-to-two optical fiber
One of branch of beam, mc represents measurement optical cavity, is represented by dashed line that Jet represents nozzle, and particulate matter is reached by nozzle and measured
Area, ot represents ligh trap, absorbs the laser that light path is not scattered, and D1 and D2 represent photomultiplier.Wherein, diaphragm A can stop
Unnecessary light passes through, it is ensured that in the range of very little, linear polarizer P is specific polarization state Laser Modulation to hot spot, at this
In individual example, we are 0 degree Laser Modulation.Measurement zone is reached by nozzle, by light scattering, is being surveyed on 85 degree of scattering angles
Amount chamber has corresponding Measurement channel UNICOM to pass light beam, is that detector is received by dissipating that polarization film is modulated in the tail end of biography light beam
Penetrate light.
Detector is not contacted directly with measurement chamber, it is to avoid possibility of the detector chip by Particulate Pollution, is polarized thin
Film and one point of four fibre bundle equipment part can be with disassembly, cleaning, and it is convenient to maintain.One point of four fibre bundle assembles retaining element, Fig. 3
It is the front view of the fibre bundle for assembling polarization film, wherein pf is polarization film, and dotted line represents polarization direction, and fb is optical fiber
Beam, fbf is the part for fixing fibre bundle, while assembling polarization film, fibre bundle is surrounded by the black bag for avoiding light leak
Skin, fbi is a ferrule of integrated four fibre bundles.
In experimentation, sample is prepared first, sample is disperseed with absolute ethyl alcohol first, then extracted with vavuum pump
During sample, can by drying tube and temperature it is higher enter specimen port, evaporate solvent, obtain dispersed preferably sample.Measurement
When, light source can effectively control spot size by diaphragm and linear polarizer, then by diaphragm, and by linear polarizer
Modulation obtains 0 degree of linearly polarized photon, allows light to incide measurement zone with thinner diameter, and nozzle is responsible for reducing and assembles air-flow, when
When grain thing flies over measurement zone, the polarization film modulation that scattering light is assembled first is received by fibre bundle below immediately after,
Then it is received by a detector by fiber optic conduction and is converted into electric signal, in finally stores data storage device.
Above content is to combine specific/preferred embodiment further description made for the present invention, it is impossible to recognized
Fixed specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, its implementation method that can also have been described to these makes some replacements or modification,
And these are substituted or variant should all be considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of particulate matter method for measuring shape of palaemon based on polarization scattering feature, it is characterised in that comprise the following steps：
Detection particulate matter is to the scattering light after laser light scattering, wherein dissipating under to the specific scattering angle θ in the range of 70-110 degree
Polarised light is penetrated to measure；
The channel of polarization voltage of scattering light is extracted, the Stokes vectors of scattering light are calculated, Mueller is obtained according to Stokes vectors
Matrix element a2 (θ), b1 (θ) in matrix M, a1 (θ), b1 (θ), and by element a2 (θ), b1 (θ), a1 (θ), b1 (θ)
Calculating, obtain characteristic polarization parameter K2：
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ))；
Value analysis and determination particulate matter form according to K2.
2. particulate matter method for measuring shape of palaemon as claimed in claim 1, it is characterised in that the specific scattering angle θ is 85 degree.
3. particulate matter method for measuring shape of palaemon as claimed in claim 1, it is characterised in that the channel of polarization includes that 0 degree polarizes
Passage and 90 degree of channel of polarization.
4. particulate matter method for measuring shape of palaemon as claimed in claim 3, it is characterised in that the channel of polarization includes being symmetrical arranged
Two 0 degree of channel of polarization and two 90 degree of channel of polarization.
5. the particulate matter method for measuring shape of palaemon as described in any one of Claims 1-4, it is characterised in that value according to K2 will
The specificity of grain thing shape attribute is characterized divides into ball, post, ellipsoid.
6. the particulate matter method for measuring shape of palaemon as described in any one of claim 1 to 5, it is characterised in that the use of light source is output
The He-Ne lasers of wavelength 632.8nm power outputs 75mW, by particle diameter 100-300nm particulate matter with the stream of 0.7L/min
Speed is scattered light and is detected by measurement zone to it.
7. a kind of measurement apparatus of particulate matter method for measuring shape of palaemon for as described in any one of claim 1 to 6, its feature exists
In, including laser, diaphragm, linear polarizer, one point of multi fiber beam, measurement optical cavity, nozzle and detector, the light more than one point
Fine beam is arranged on the specific scattering angle in the range of 70-110 degree, and it is scattered to be formed to be equipped with polarization film in fibre bundle front end
The channel of polarization of light, preferably 0 degree channel of polarization and 90 degree of channel of polarization are penetrated, after the light that the laser sends is by diaphragm
Specific polarization state is modulated to by the linear polarizer, by it is described measurement optical cavity during through the nozzle spray
After grain thing scattering, scattering polarization light enters the channel of polarization of scattering light by one point of multi fiber beam, then by the detector
Detection.
8. measurement apparatus as claimed in claim 7, it is characterised in that the specific scattering angle is 85 degree.
9. measurement apparatus as claimed in claim 7 or 8, it is characterised in that one point of multi fiber beam is one-to-two fibre bundle,
0 degree of channel of polarization and 90 degree of channel of polarization, or one point of multi fiber beam are formed on the one-to-two fibre bundle
It is one point of four fibre bundle, symmetrically arranged two 0 degree of channel of polarization and two 90 degree of polarizations is formed on one point of four fibre bundle
Passage.
10. measurement apparatus as described in any one of claim 7 to 9, it is characterised in that the specific polarization state is 0 degree
Polarization state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611123394.5A CN106769709B (en) | 2016-12-08 | 2016-12-08 | A kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611123394.5A CN106769709B (en) | 2016-12-08 | 2016-12-08 | A kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106769709A true CN106769709A (en) | 2017-05-31 |
| CN106769709B CN106769709B (en) | 2019-03-26 |
Family
ID=58881698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611123394.5A Active CN106769709B (en) | 2016-12-08 | 2016-12-08 | A kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106769709B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747911A (en) * | 2017-09-30 | 2018-03-02 | 中兴仪器（深圳）有限公司 | A kind of Atmospheric particulates special appearance identification device |
| CN108287126A (en) * | 2018-03-23 | 2018-07-17 | 中国计量科学研究院 | Nano particle diameter measuring system |
| CN108844865A (en) * | 2018-04-20 | 2018-11-20 | 清华大学深圳研究生院 | A kind of method and device of dual wavelength polarized light scatter measurement particulate matter |
| CN109883930A (en) * | 2019-03-25 | 2019-06-14 | 中兴仪器（深圳）有限公司 | A kind of aerosol particle refractive index measurement method based on polarized light scatter |
| CN109883902A (en) * | 2019-02-28 | 2019-06-14 | 西安理工大学 | Haze device for detecting particles and its detection method based on solar blind UV circular polarization |
| CN112229799A (en) * | 2020-09-21 | 2021-01-15 | 华南师范大学 | Polarized photoacoustic Mueller matrix imaging method and system |
| CN113720744A (en) * | 2021-11-04 | 2021-11-30 | 碧兴物联科技(深圳)股份有限公司 | Atmospheric particulate content real-time monitoring method based on polarization detection technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2431203A1 (en) * | 1973-07-02 | 1975-01-23 | Block Engineering | METHOD AND DEVICE FOR DETECTION OF VIRUSES |
| CN105092444A (en) * | 2015-07-24 | 2015-11-25 | 清华大学 | Measure method for combined distribution of nanometer particle concentration and geometrical characteristic quantity |
| US20160003727A1 (en) * | 2013-08-23 | 2016-01-07 | Sharp Kabushiki Kaisha | Photodetection device |
| CN205562386U (en) * | 2016-03-25 | 2016-09-07 | 中国人民解放军理工大学 | Nature atmospheric aerosol muller matrix automatic measuring device |
-
2016
- 2016-12-08 CN CN201611123394.5A patent/CN106769709B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2431203A1 (en) * | 1973-07-02 | 1975-01-23 | Block Engineering | METHOD AND DEVICE FOR DETECTION OF VIRUSES |
| US20160003727A1 (en) * | 2013-08-23 | 2016-01-07 | Sharp Kabushiki Kaisha | Photodetection device |
| CN105092444A (en) * | 2015-07-24 | 2015-11-25 | 清华大学 | Measure method for combined distribution of nanometer particle concentration and geometrical characteristic quantity |
| CN205562386U (en) * | 2016-03-25 | 2016-09-07 | 中国人民解放军理工大学 | Nature atmospheric aerosol muller matrix automatic measuring device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747911A (en) * | 2017-09-30 | 2018-03-02 | 中兴仪器（深圳）有限公司 | A kind of Atmospheric particulates special appearance identification device |
| CN108287126A (en) * | 2018-03-23 | 2018-07-17 | 中国计量科学研究院 | Nano particle diameter measuring system |
| CN108844865A (en) * | 2018-04-20 | 2018-11-20 | 清华大学深圳研究生院 | A kind of method and device of dual wavelength polarized light scatter measurement particulate matter |
| CN109883902A (en) * | 2019-02-28 | 2019-06-14 | 西安理工大学 | Haze device for detecting particles and its detection method based on solar blind UV circular polarization |
| CN109883930A (en) * | 2019-03-25 | 2019-06-14 | 中兴仪器（深圳）有限公司 | A kind of aerosol particle refractive index measurement method based on polarized light scatter |
| CN112229799A (en) * | 2020-09-21 | 2021-01-15 | 华南师范大学 | Polarized photoacoustic Mueller matrix imaging method and system |
| CN112229799B (en) * | 2020-09-21 | 2022-11-01 | 华南师范大学 | Polarized photoacoustic Mueller matrix imaging method and system |
| CN113720744A (en) * | 2021-11-04 | 2021-11-30 | 碧兴物联科技(深圳)股份有限公司 | Atmospheric particulate content real-time monitoring method based on polarization detection technology |
| CN113720744B (en) * | 2021-11-04 | 2022-01-25 | 碧兴物联科技(深圳)股份有限公司 | Atmospheric particulate content real-time monitoring method based on polarization detection technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106769709B (en) | 2019-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106769709B (en) | A kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature | |
| CN106769696B (en) | A kind of carbon black pellet object measurement method and device based on polarization scattering feature | |
| CN109900621B (en) | Multi-angle polarized light scattering PM2.5 single particle measuring device | |
| CN104089855B (en) | A kind of polarized light scatter measures the method and device of particulate matter | |
| EP2270449B1 (en) | Dynamic light-scattering measuring apparatus and method for measuring light-scattering intensity of particles in a medium | |
| CN207991998U (en) | A kind of airborne back scattering cloud particle survey meter and meteorological detecting devices | |
| DE69028588D1 (en) | PARTICLE SIZE ANALYSIS USING THE POLARIZED DIFFERENTIAL SCREEN INTENSITY | |
| US20220252497A1 (en) | Method and system for measuring refractive index of particle sample by using polarization difference of scattered light distribution | |
| US20190033191A1 (en) | Method and device for detection and/or morphologic analysis of individual fluid-borne particles | |
| CN108344671A (en) | A kind of airborne back scattering cloud particle survey meter, meteorological detection equipment and cloud particle detection method | |
| CN105785071A (en) | High-sensitivity light trap measuring device and measuring method thereof | |
| CN106018193A (en) | Light scattering measurement system and method for particulate matters | |
| US20120274925A1 (en) | Axial light loss sensor system for flow cytometery | |
| JP2004125602A (en) | Pollen sensor | |
| CN109883930A (en) | A kind of aerosol particle refractive index measurement method based on polarized light scatter | |
| CN106483052A (en) | A kind of PM2.5 detector based on light scattering method | |
| Soini et al. | A new design of the flow cuvette and optical set‐up for the scanning flow cytometer | |
| CN109883902A (en) | Haze device for detecting particles and its detection method based on solar blind UV circular polarization | |
| CN103499393A (en) | Spectrum measuring method | |
| CN102590092B (en) | Absorption optical path lengthening device and method for laser absorption spectroscopy technology | |
| CN108387504A (en) | Particle collector is closed in cohesion | |
| CN108844865A (en) | A kind of method and device of dual wavelength polarized light scatter measurement particulate matter | |
| CN208076357U (en) | Particle collector is closed in cohesion | |
| CN106053303A (en) | Laser forward scattering cloud droplet spectrum detection system | |
| CN110987736B (en) | Aerosol particle spectrum and concentration measuring device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |