CN106769709B - 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
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- 230000010287 polarization Effects 0.000 title claims abstract description 97
- 239000013618 particulate matter Substances 0.000 title claims abstract description 46
- 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 39
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 238000002356 laser light scattering Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 42
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- 230000015572 biosynthetic process Effects 0.000 claims 1
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- 239000000523 sample Substances 0.000 description 16
- 239000010408 film Substances 0.000 description 11
- 238000002474 experimental method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000002360 preparation method Methods 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
- 238000004364 calculation method Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 229960000935 dehydrated alcohol Drugs 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 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
- 238000012545 processing Methods 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
- 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
- 229910052586 apatite Inorganic materials 0.000 description 1
- 238000000149 argon plasma sintering Methods 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
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- 238000010304 firing Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 239000003960 organic solvent Substances 0.000 description 1
- 238000011192 particle characterization Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[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 VSIIXMUUUJUKCM-UHFFFAOYSA-D 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
- 238000004080 punching Methods 0.000 description 1
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Classifications
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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
- G01N15/0211—Investigating a scatter or diffraction pattern
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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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Abstract
The invention discloses a kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature, method includes the following steps: detecting present granule object to the scattering light after laser light scattering, wherein measuring to the scattering polarization light under the specific scattering angle θ within the scope of 70-110 degree；Extract the channel of polarization voltage of scattering light, calculate the Stokes vector of scattering light, element a2 (θ), b1 (θ), a1 (θ), the b1 (θ) in Mueller matrix M are obtained according to Stokes vector, and by the calculating to element a2 (θ), b1 (θ), a1 (θ), b1 (θ), characteristic polarization parameter K2 is obtained；Particulate matter form is analyzed and determined according to the value of K2.Operation of the present invention is simple and fast, and measurement range is wide, and limitation is small, reduces the quantity of detector, reduces costs.
Description
Technical field
The present invention relates to particulate matter detection technique field, especially a kind of particulate matter form based on polarization scattering feature is surveyed
Measure method and apparatus.The content of the earlier patent application publication number CN104089855A of applicant is incorporated to this in a manner of being cited in full text
Text.
Background technique
Morphological analysis is in cell classification, and there are important function to particle characterization for atmospheric optics and marine optics field.For
Isotropism sphere, Mie theory have been presented for the detailed description of scattering Muller matrix, however for cylindrical body or anisotropy
Globoid particle, Mie theory lacks effective calculate.In recent years, some theories constructed random uneven grain scattering
Solution, the element of the Muller matrix of scatterer can be used to characterize the shape of scatterer (see formula (1)).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.
Summary 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, a kind of particulate matter method for measuring shape of palaemon and device based on polarization scattering feature is provided.
To achieve the above object, the invention adopts the following technical scheme:
A kind of particulate matter method for measuring shape of palaemon based on polarization scattering feature, comprising the following steps:
Particulate matter is detected to the scattering light after laser light scattering, wherein under the specific scattering angle θ within the scope of 70-110 degree
Scattering polarization light measure；
The channel of polarization voltage of scattering light is extracted, the Stokes vector of scattering light is calculated, is obtained according to Stokes vector
Matrix element a2 (θ), b1 (θ), a1 (θ), b1 (θ) in Mueller matrix M, and by element a2 (θ), b1 (θ), a1
The calculating of (θ), b1 (θ) obtain characteristic polarization parameter K2:
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ))；
Particulate matter form is analyzed and determined according to the value of 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.
The specificity characterization of particulate matter shape attribute is divided into ball, column, ellipsoid according to the value of K2.
The He-Ne laser for the use of light source being output wavelength 632.8nm output power 75mW, by partial size in 100-300nm
Particulate matter with the flow velocity of 0.7L/min by measurement zone, and light is scattered to it and is detected.
A kind of measuring device for the 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 within the scope of 70-110 degree
On specific scattering angle, and polarization film is equipped with to form the channel of polarization of scattering light in fiber optic bundle front end, preferably 0 degree partially
Vibration channel and 90 degree of channel of polarization, the light that the laser issues are specific by being modulated to after diaphragm by the linear polarizer
Polarization state, by it is described measurement optical cavity during sprayed through the nozzle particulate matter scattering 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 fiber optic bundle, forms 0 degree of channel of polarization on the one-to-two fiber optic bundle
It is one point of four fiber optic bundle with 90 degree of channel of polarization or one point of multi fiber beam, is formed on one point of four fiber optic bundle
Symmetrically arranged two 0 degree of channel of polarization and two 90 degree of channel of polarization.
The polarization state that the specific polarization state is 0 degree.
Beneficial effects of the present invention:
Measurement 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 column.The form of particulate matter is not only reflected in scattering strength in variable grain object scattering process,
More sensitively polarisation-affecting optical signature, the measurement pattern of polarization scattering traditional light scattering component analysis pair can be effectively reduced
The requirement of angle and wavelength information.It is at low cost that the present invention inherits the more other methods of light scattering method, simple and quick, measures model
Enclose wide, the small advantage of limitation；On this basis, and reduce the quantity of detector, further reduce costs, simplify survey
Measure instrument structure.
Detailed description of the invention
The present invention is based on a kind of schematic diagrames of embodiment of the particulate matter configuration measurement mechanism of polarization scattering feature by Fig. 1；
The schematic diagram of the one-to-two fiber optic bundle of Fig. 2 an embodiment of the present invention；
Fig. 3 is the front view for the local G that fiber optic bundle shown in Fig. 2 assembles polarization film；
The present invention is based on a kind of flow charts of embodiment of the particulate matter method for measuring shape of palaemon of polarization scattering feature by Fig. 4；
Fig. 5 indicates that three kinds of different shape particulate matters are obtained in 0 degree of linearly polarized photon incident scatter in 85 degree of scattering angular measurements
K2 value.
Specific embodiment
It elaborates below to embodiments of the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention.
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,
The following steps are included:
Particulate matter is detected to the scattering light after laser light scattering, wherein under the specific scattering angle θ within the scope of 70-110 degree
Scattering polarization light measure；
The channel of polarization voltage of scattering light is extracted, the Stokes vector of scattering light is calculated, is obtained according to Stokes vector
Matrix element a2 (θ), b1 (θ), a1 (θ), b1 (θ) in Mueller matrix M, and by element a2 (θ), b1 (θ), a1
The calculating of (θ), b1 (θ) obtain characteristic polarization parameter K2:
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ))；
Particulate matter form is analyzed and determined according to the value of K2.
Refering to fig. 1 to Fig. 4, in another embodiment, a kind of measurement for the 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 within the scope of 70-110 degree, and assembles in fiber optic bundle front end
There is polarization film to form the channel of polarization of scattering light, preferably 0 degree of channel of polarization and 90 degree of channel of polarization, the laser hair
Light out is by being modulated to specific polarization state by the linear polarizer after diaphragm, during passing through the measurement optical cavity
After the particulate matter scattering sprayed through the nozzle, scattering polarization light is logical 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 an embodiment of the present invention, step 1: utilizing polarimetry special angle lower
The scattering polarization light of grain object measures；Step 2: extracting the channel of polarization voltage of scattering light, Stokes component is calculated, is obtained
Characteristic polarization parameter K2 can be obtained by the operation to Muller matrix element in element in Muller matrix.
Its principle is, using Mie scattering theory, can establish expression by the scattering light to incident polarised light and analyzing
The Stokes vector of its light intensity and polarization state, available scatterer Muller matrix.Wherein, Mueller matrix and Stokes arrow
The mathematical expression form of amount is respectively following formula (1) and (2):
Sout=MSin (2)
In above formula (2), SinIndicate the Stokes vector of incident light, SoutIndicate the Stokes vector of emergent light.Stokes arrow
I in amount represents the overall strength or the sum of 0 ° and 90 ° light intensity of light；Q represents the difference of 0 ° and 90 ° light intensity；U represents 0 ° and 90 ° of light intensity
Difference；V represents the poor I of dextrorotation and left-handed rotatory polarization by force as total light intensity, therefore other than resolving into the sum of 0 ° and 90 ° light intensity,
It can also be write as the sum of 0 ° and -0 ° or left-handed and dextrorotation light intensity.Q indicates that detection light becomes the tendency of 0 ° or 90 °, if Q > 0
Show that emergent light is easier to become 0 ° of polarization direction.U indicates that detection light becomes the tendency of 0 ° or -0 °, and emergent light more holds if U > 0
Mutability is at 0 ° of polarization direction.V indicates that detection light becomes the tendency of dextrorotation or Left-hand circular polarization, and emergent light is easier to become if V > 0
At right-hand circular polarization.We utilize the element of Muller matrix, directly obtain the polarization parameter that the present invention provides using following formula (3)
K2:
K2=(a2 (θ)+b1 (θ))/(a1 (θ)+b1 (θ)) (3)
Inventors have found that the K2 of scattering light is obtained by the stokes vector after measurement scattering, with K2 to particulate matter shape
The specificity characterization of attribute can distinguish ball, column, ellipsoid, and inventor also found, K2 is influenced by particulate matter variations in refractive index
It is smaller, and there is the specificity characterization in small particle.
Polarization parameter shows differential responses to variable grain object ingredient, and this characterization of polarization parameter is by length
Short axle has obvious characterization in 1.7-4.7 than range, and compared with (partial size is in 100-300nm) under small particle not with the change of partial size
Change and great change occurs.Particulate matter can be made to pass through measurement zone, but the dispersion of particulate matter with certain speed by designing gas circuit
Property decisive role played to measurement, the dispersion of measurement preparation stage sample is crucial one of step.At 85 degree of measurement angle
Under obtain scatter light polarization parameter, to measuring signal carry out processing calculate identification, thus obtain characterization particulate matter shape polarization ginseng
The value of amount.
In use, first adjusting to system calibration to signal acquiring system, backscatter luminous intensity is eliminated, and eliminate other
Electromagnetic interference guarantees the accuracy of collected data.Dispersion dehumidifying is carried out to sample, it (can in the present invention using organic solvent
Using dehydrated alcohol) and ultrasonic case sample is dispersed it is uniform.Then the laboratory sample of preparation is pumped into measurement by air pump again
In chamber, drying tube and 40 degrees Celsius of injection ports guarantee solvent volatilization.To guarantee that sample can be transported by the direction perpendicular to optical path
Row processes the nozzle at sample entrance port, allows air-flow to attenuate, the air-flow for being tapered sample passes through measurement zone.Finally by photoelectricity
Multiplication is in control scattered light intensity, stores measurement data by capture card and data storage device, polarization parameter is finally calculated
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, polarizing film,
Diaphragm surface is vertical with laser, and inclination is avoided to lead to the polarization state for obtaining inaccuracy and non-planar light.
Second step, the sample of preparation are drawn into measurement chamber by air pump, the polarizing film direction of incidence end be 0 degree (with
Laboratory coordinate is referential), 85 degree of receiving end polarizing films are realized using one-to-two fiber optic bundle, diagonal at fiber optic bundle set end
The polarizing coating of the same direction is assembled before the fiber optic bundle of line, direction is respectively 0 degree and 90 degree, can obtain scattering light 0 simultaneously in this way
The voltage pulse value of degree and 90 degree of channel of polarization.
Third step, measurement have obtained electric pulse of the particulate matter under four channel of polarization, have utilized certain Filtering system and arteries and veins
Punching handles to obtain corresponding Q component and I component, and K2 value is calculated, and is analyzed and characterized to carbon black pellet object.
It below will be by example come the present invention is described in detail.
Measuring system: the He-Ne laser that this measuring system is output wavelength 632.8nm output power 75mW using light source
Device, green light pass through.
Example one:
Sample: polystyrene microsphere (200nm, refractive index 1.59), hydroxyapatite (ellipsoid, etc. small particles 200nm, folding
Penetrate rate 1.64), sodium niobate (threadiness, 100nm, refractive index 2.2).
Identify step:
(1) for particulate matter with the flow velocity of 0.7L/min by measurement zone, dispersion quality is that 1g sample negative pressure sucks and disperses
In the cabinet of 10 × 10 × 10cm, measurement zone is then entered by nozzle again.Determining incident polarization light measurement is obtained
The voltage value in 0 degree and 90 degree channel after scattering has chosen 85 degree of scattering angle of Stokes vector analysis here.
(2) voltage value measured is handled and is screened, to standard compliant pulse integration, by 0 degree of channel and 90 degree
Path computation obtains Q component and I component obtains K2.
It (3) is the reliability for guaranteeing experiment, primary experiment carries out more than ten times effectively experiment to the sample of a component, right
Each experimental calculation obtains as a result, then calculating average value and variance of the K2 under each component, the reliability of confirmatory experiment.
Fig. 5 indicates that three kinds of different shape particulate matters used in example one are dissipated in 0 degree of linearly polarized photon incident scatter at 85 degree
The K2 value that firing angle measurement obtains.Wherein horizontal axis is three kinds of different particulate matters, is from left to right polystyrene microsphere, hydroxyl respectively
Apatite, sodium niobate, blue cylindricality calculated value, brown cylindricality correspond to laboratory mean values, and 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 characterizes the specificity of particulate matter form.
Because photomultiplier tube is sensitivity to optrode, if slightly light leakage will result in measurement greatly misalignment, so surveying
Measure it is intracavitary do Darkening process, and it is coarse as far as possible, allow stray light to be absorbed or be reflected by cavity, do not reach in fiber optic bundle, simultaneously
Increase by 85 degree of Measurement channels, reduces the reception of other angle scattering light.Under measured result, when only opening laser, photomultiplier tube
Reception voltage in 20mv level, measurement is in 1v level, therefore background noise and stray light are controlled well.
To guarantee the particle concentration under the true ambient enviroment of sample simulation, sample is diluted, and is measured entering
Guarantee that concentration is lower when chamber, so nozzle does downsizing processing；Divide four fiber optic bundles and polarization pad pasting to assembly one, designs special
The fixed fiber optic bundle of component and polarization pad pasting, Fig. 2 is fiber optic bundle trim designs, and one point of four fiber optic bundle is fixed on a cylinder in Fig. 2
In, it is fixed with pin, polarization pad pasting is placed in card slot, is compressed with screw, guarantees the relatively solid of polarization direction and fiber optic 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 analysis data, this reduces the dependence to angle compared with common scattering method.
System structure such as Fig. 1, wherein light source is He-Ne laser LASER (output wavelength 6328nm output power
75mW), A indicates that diaphragm, P indicate linear polarizer (THORLABS, QSA, extinction ratio 20000:1), and fb indicates one-to-two optical fiber
One of branch of beam, mc indicate measurement optical cavity, are represented by dashed line that Jet indicates that nozzle, particulate matter are reached by nozzle and measured
Area, ot indicate ligh trap, absorb the laser that optical path is not scattered, and D1 and D2 indicate photomultiplier tube.Wherein, diaphragm A can stop
Extra light passes through, and guarantees hot spot to a very small extent, and linear polarizer P is specific polarization state Laser Modulation, at this
In a example, we are 0 degree Laser Modulation.Measurement zone is reached by nozzle, is scattered by light, is being surveyed on 85 degree of scattering angles
Amount chamber has corresponding Measurement channel connection to pass light beam, is that detector receives dissipating by polarization film modulation in the tail end for passing light beam
Penetrate light.
Detector is not direct to be contacted with measurement chamber, is avoided a possibility that detector chip is by Particulate Pollution, is polarized thin
Film and one point of four fiber optic bundle equipment part can be with disassembly, cleaning, and it is convenient to maintain.One point of four fiber optic bundle assembles retaining element, Fig. 3
It is the front view for assembling the fiber optic bundle of polarization film, wherein pf is polarization film, and dotted line indicates polarization direction, and fb is optical fiber
Beam, fbf are the part of fixed fiber optic bundle, while assembling polarization film, and fiber optic bundle is surrounded by the black packet for avoiding light leakage
Skin, fbi are a ferrules of integrated four fiber optic bundles.
It in experimentation, first prepared by sample, sample is dispersed with dehydrated alcohol first, then is extracted with vacuum pump
, can be by drying tube and temperature is higher evaporates solvent into specimen port when sample, obtain the preferable sample of dispersibility.Measurement
When, light source passes through diaphragm and linear polarizer, then by diaphragm, can effectively control spot size, and pass through linear polarizer
Modulation obtains 0 degree of linearly polarized photon, and light is allowed to be incident on measurement zone with thinner diameter, and nozzle, which is responsible for reducing, assembles air-flow, when
When grain object flies over measurement zone, the polarization film modulation that scattering light is assembled first is received by subsequent fiber optic bundle immediately after,
Then it is received by a detector by fiber optic conduction and is converted into electric signal, finally stored in data storage device.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (9)
1. a kind of particulate matter method for measuring shape of palaemon based on polarization scattering feature, which comprises the following steps:
Particulate matter is detected to the scattering light after laser light scattering, wherein to dissipating under the specific scattering angle θ within the scope of 70-110 degree
Polarised light is penetrated to measure；
The channel of polarization voltage of scattering light is extracted, the Stokes vector of scattering light is calculated, Mueller is obtained according to Stokes vector
Matrix element a2 (θ), b1 (θ), a1 (θ), b1 (θ) in matrix M, 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))；
Particulate matter form is analyzed and determined according to the value of K2.
2. particulate matter method for measuring shape of palaemon as described in claim 1, which is characterized in that the specific scattering angle θ is 85 degree.
3. particulate matter method for measuring shape of palaemon as described in claim 1, which is characterized in that the channel of polarization includes 0 degree of polarization
Channel and 90 degree of channel of polarization.
4. particulate matter method for measuring shape of palaemon as claimed in claim 3, which is characterized 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. such as the described in any item particulate matter method for measuring shape of palaemon of Claims 1-4, which is characterized in that according to the value of K2 general
The specificity characterization of grain object shape attribute divides into ball, column, ellipsoid.
6. such as the described in any item particulate matter method for measuring shape of palaemon of Claims 1-4, which is characterized in that using light source is output
The He-Ne laser of wavelength 632.8nm output power 75mW, by partial size 100-300nm particulate matter with the stream of 0.7L/min
Speed is scattered light to it and is detected by measurement zone.
7. a kind of measuring device for particulate matter method for measuring shape of palaemon such as claimed in any one of claims 1 to 6, feature exist
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 within the scope of 70-110 degree, and it is scattered to be formed in fiber optic bundle front end to be equipped with polarization film
The channel of polarization of light is penetrated, the light that the laser issues by the linear polarizer after diaphragm by being modulated to specifically polarize
State, after the particulate matter scattering sprayed during through the measurement optical cavity through the nozzle, scattering polarization light passes through described one
Point multi fiber beam enters the channel of polarization of scattering light, then is detected by the detector.
8. measuring device as claimed in claim 7, which is characterized in that one point of multi fiber beam is one-to-two fiber optic bundle, institute
Stating one 0 degree of channel of polarization of formation and 90 degree of channel of polarization or one point of multi fiber beam on one-to-two fiber optic bundle is
One point of four fiber optic bundle, forms symmetrically arranged two 0 degree of channel of polarization on one point of four fiber optic bundle and two 90 degree of polarizations are logical
Road.
9. measuring device as claimed in claim 7, which is characterized in that the polarization state that the specific polarization state is 0 degree.
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| 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 |
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| 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 |
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| CN106769709B true CN106769709B (en) | 2019-03-26 |
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| 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 |
| CN108287126B (en) * | 2018-03-23 | 2021-07-09 | 中国计量科学研究院 | Nanoparticle size measurement 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 |
| CN112229799B (en) * | 2020-09-21 | 2022-11-01 | 华南师范大学 | Polarized photoacoustic Mueller matrix imaging method and system |
| 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 |
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| 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 |
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| 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 |
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