CN107305179A - particle concentration detection method - Google Patents
particle concentration detection method Download PDFInfo
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- CN107305179A CN107305179A CN201610248232.8A CN201610248232A CN107305179A CN 107305179 A CN107305179 A CN 107305179A CN 201610248232 A CN201610248232 A CN 201610248232A CN 107305179 A CN107305179 A CN 107305179A
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- 239000002245 particle Substances 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000013618 particulate matter Substances 0.000 claims abstract description 86
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 24
- 238000005286 illumination Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 239000012491 analyte Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000001228 spectrum Methods 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
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
-
- G01N15/075—
Abstract
The present invention relates to particle concentration detection method, including：Illumination is mapped on the reference gas of at least one particulate matter comprising concentration known, produce light scattering effect, and scattering strength of the light at least one light scattering angle is detected using photodetector, be used as the reference value of at least one particulate matter；The illumination of same intensity is set to be mapped in the under test gas comprising the unknown at least one particulate matter of concentration, and the photodetector detects scattering strength of the light at least one described light scattering angle, is used as the measured value of at least one particulate matter；And according to particulate matter scattering principle, based on the reference value and the measured value, calculate the concentration of at least one particulate matter.It is relatively low according to the cost of the particle concentration detection method of the present invention, and particle concentration can be quickly detected.
Description
Technical field
, can be more more particularly, to one kind the present invention relates to particle concentration detection technique
Quickly detect the particle concentration detection method of particle concentration.
Background technology
With the sustainable development of China's economic, the standard of living of people also progressively improves.But,
Problem of environmental pollution becomes increasingly conspicuous.PM2.5 (diameter is less than 2.5um particulate matter) and people
It is healthy closely related.PM2.5 increase will cause the disease of various respiratory tracts.Due to air
Worse and worse, air purifying process and purification generation development are very fast for quality.Currently, small
The detection method of grain thing mainly has following several：
1) suction spectrum scan method, the precision of this measuring method is higher, and can distinguish not
With the concentration of diameter particle thing.But, the cost of this measuring method is higher, and is confined to
Special measuring apparatus.Therefore, the measuring method is not particularly suited for daily use.
2) simple light scattering principle and the dynamic (dynamical) principle of hot-air.By being added to air
Heat is to produce thermal convection current, and small particle flow to detection light region, so as to be detected.This inspection
The cost of survey method is relatively low, and is therefore widely adopted.But, the detection method can cause compared with
Big power consumption.In addition, larger equipment distinguishes desirable particle size usually using cutting equipment.
The cost of cutting equipment is generally higher and larger, therefore this detection method is not suitable for yet
Daily use.
Accordingly, it would be desirable to which a kind of can be suitable for for quickly detecting particle concentration of low cost
Grain thing concentration detection method.
The content of the invention
The present disclosure proposes a kind of particle concentration detection method, cost is relatively low and can be promptly
Detect particle concentration.
According to an aspect of the present invention, it is proposed that a kind of particle concentration detection method, including：
Illumination is mapped on the reference gas of at least one particulate matter comprising concentration known, produce light and dissipate
Effect is penetrated, and scattering of the light at least one light scattering angle is detected using photodetector
Intensity, is used as the reference value of at least one particulate matter；The illumination of same intensity is set to be mapped to bag
In the under test gas of unknown at least one particulate matter containing concentration, and the photodetector
Detect scattering strength of the light at least one described light scattering angle, as it is described at least
A kind of measured value of particulate matter；And according to particulate matter scattering principle, based on the reference value and
The measured value, calculates the concentration of at least one particulate matter.
According to embodiment, the quantity for the light scattering angle to be measured is equal to or more than described at least one
Plant the quantity of particulate matter.
According to embodiment, at least one particulate matter includes particulate matter X, and its concentration is DPMX,
And reference values of the particulate matter X that detect of photodetector A in a light scattering angle is
PA_PMX, for the particulate matter X that concentration is unknown, it is assumed that particulate matter X concentration is CPMX, institute
It is D to state the measured value that photodetector A detectsA, then have
Particulate matter X concentration C can be calculated according to above-mentioned formulaPMX。
According to embodiment, at least one particulate matter includes two kinds of particles thing X and Y, and its is dense
Degree is respectively DPMXAnd DPMY, and particulate matter X and Y that photodetector A and B are detected exist
Reference value in two light scattering angles is respectively PA_PMX、PA_PMY, PB_PMX, and PB_PMY,
For the particulate matter X and Y that concentration is unknown, it is assumed that particulate matter X and Y concentration is respectively
CPMXAnd CPMY, the measured value respectively D that the photodetector A and B is detectedAAnd DB,
Then have
Particulate matter X and Y concentration C can be calculated according to above-mentioned formulaPMXAnd CPMY。
According to embodiment, at least one particulate matter is bulky grain thing, its a diameter of about 10um.
According to embodiment, at least one particulate matter is small particle, its a diameter of about 2.5um.
According to embodiment, the photodetector is photodiode.
According to embodiment, in the ginseng for making illumination be mapped at least one particulate matter comprising concentration known
Before examining on particulate matter, in addition to：Reference gas is filled with region to be measured.
According to embodiment, the illumination for making same intensity be mapped to comprising concentration it is unknown described at least
Before in a kind of under test gas of particulate matter, in addition to：Area filling to be measured is set to have described treat
Survey gas.
Unlike the prior art, particle concentration detection method according to embodiments of the present invention improves
The performance of particle analyte detection, at least includes：
1. the particulate matter of different-diameter is optically distinguished, therefore cost is relatively low；
2. the concentration of particulate matter is calculated by using reference value and measured value, therefore can be rapid
Detect particle concentration in ground.
Brief description of the drawings
By illustrating the preferred embodiments of the present invention below in conjunction with the accompanying drawings, it will make the present invention's above-mentioned
And other objects, features and advantages are clearer, wherein：
Fig. 1 is the flow chart for showing particle concentration detection method according to embodiments of the present invention；
Fig. 2 is to show that particle concentration detection method according to embodiments of the present invention can be used
Instrument schematic diagram.
Embodiment
Referring to the drawings, the example embodiment to the present invention is described in detail.Retouched following
In stating, some specific embodiments are only used for describing purpose, and should not be construed has to the present invention
Any limitation, and the simply example of the present invention.Cause to mix the understanding of the present invention may be caused
When confusing, conventional structure or construction will be omitted.
Fig. 1 is the stream for showing particle concentration detection method 100 according to embodiments of the present invention
Cheng Tu.Particle concentration detection method according to embodiments of the present invention using light scattering principle and
Grain thing scattering principle.When needing the concentration of the unknown particle of detectable concentration, this method starts.
First, at step S110, measurement obtains the reference value of the particulate matter of concentration known.Specifically
Ground, makes illumination be mapped on the reference gas of at least one particulate matter comprising concentration known, and make
Scattering strength of the light at least one light scattering angle is detected with photodetector, institute is used as
State the reference value of at least one particulate matter.Then, at step S120, measurement obtains unknown
The measured value of the particulate matter of concentration.Specifically, the illumination of same intensity is made to be mapped to comprising concentration not
In the under test gas at least one particulate matter known, and photodetector detection is described
Scattering strength of the light at least one described light scattering angle, is used as at least one particle
The measured value of thing.Then, at step S130, unknown concentration is calculated.Specifically, root
According to particulate matter scattering principle, based on the reference value and the measured value, calculate described at least one
Plant the concentration of particulate matter.
, can will in order to accurately detect the particulate matter of the various diameters included in gas
The quantity configuration of the light scattering angle of measurement is the number equal to or more than at least one particulate matter
Amount.
If for example, to measure the concentration of the two kinds of particles thing included in air, ginseng can be caused
Both particulate matters that gas includes concentration known are examined, and are arranged at least two angle of scatterings
Photodetector detects the light scatter intensity of both particulate matters.
In one example, at least one particulate matter includes particulate matter X, and its concentration is
DPMX, and light detection slits references of the particulate matter X that detect of A in a light scattering angle
It is worth for PA_PMX, for the particulate matter X that concentration is unknown, it is assumed that particulate matter X concentration is CPMX,
The measured value that the photodetector A is detected is DA, then have
Particulate matter X concentration C can be calculated according to above-mentioned formulaPMX。
In another example, at least one particulate matter includes two kinds of particles thing X and Y,
Its concentration is respectively DPMXAnd DPMY, and the particulate matter X that detects of photodetector A and B and
Reference values of the Y in two light scattering angles is respectively PA_PMX、
PA_PMY, PB_PMX, and PB_PMY, for the particulate matter X and Y that concentration is unknown, it is assumed that particle
Thing X and Y concentration are respectively CPMXAnd CPMY, what the photodetector A and B was detected
Measured value is respectively DAAnd DB, then have
Particulate matter X and Y concentration C can be calculated according to above-mentioned formulaPMXAnd CPMY。
Particle concentration detection method according to embodiments of the present invention, can detect bulky grain thing
Concentration, such as a diameter of about 10um particulate matter.
Particle concentration detection method according to embodiments of the present invention, can also detect small particle
Concentration, such as a diameter of about 2.5um particulate matter.
Embodiments in accordance with the present invention, photodetector can be photodiode or other detectors.
Fig. 2 is to show that particle concentration detection method according to embodiments of the present invention can be used
Instrument schematic diagram.As illustrated, the instrument includes a through hole (being illustrated as circle),
As the entrance for receiving reference gas or under test gas；One light source, for lighting；And two
Individual photodetector, is arranged on two light scattering angles.At work, first, by reference gas
Region to be measured is filled with by through hole.Then, light source sends light, is irradiated on region to be measured.
The reference value of the particulate matter of concentration known in two photodetector detection reference gases.Then, make
Area filling to be measured has the under test gas for including the unknown particulate matter of concentration.Use same intensity
Light irradiation region to be measured, and the survey of the unknown particulate matter of two photodetector detectable concentrations
Value.Then, the open-minded processing of the instrument slit (not shown) can according to particulate matter scattering principle,
Based on the reference value and the measured value, the concentration of the particulate matter is calculated.
As an example, assuming the concentration for needing to measure two kinds of particles thing X and Y.In reference gas
In, particulate matter X concentration is DPMX=20mg/m3, particulate matter Y concentration is DPMX=20
mg/m3.Two photodetectors A and B detect particulate matter X and particulate matter Y light scattering respectively
Intensity, the particulate matter X and Y that photodetector A and B are detected is in two light scattering angles
Reference value be respectively PA_PMX、PA_PMY, PB_PMX, and PB_PMY, wherein PA_PMY=0.6
MV, PA_PMX=5mV, PB_PM2Y=0.5mV, PB_PMX=4.75mV.Now, such as
Under test gas with concentration unknown particulate matter X and Y is filled with region to be measured by fruit, and
The measured value that photodetector is detected respectively DAAnd DB.Then basis
Reference value and measured value are substituted into above-mentioned formula has
132=0.6xCPMY+5xCPMX
121=0.5xCPMY+4.75xCPMX
Calculating obtains particulate matter X and particulate matter Y concentration is respectively
CPMX=18.86mg/m3
CPMY=62.86mg/m3
It should be understood that strictly, embodiments of the invention can be implemented as in computer equipment
Software program, software and hardware or single software and/or single circuit.
It should be noted that in the above description, only in an illustrative manner, showing this hair
Bright technical scheme, but it is not intended that the invention be limited to above-mentioned steps and cellular construction.
In the case of possible, step and cellular construction can be adjusted and accepted or rejected as needed.Cause
This, some steps and unit not implement element necessary to the overall invention thought of the present invention.
Therefore, technical characteristic essential to the invention, which is limited solely by, can realize the overall invention of the present invention
The minimum requirements of thought, without being limited by above instantiation.
So far combined preferred embodiment invention has been described.It should be understood that ability
Field technique personnel without departing from the spirit and scope of the present invention, can carry out it is various its
Its change, replacement and addition.Therefore, the scope of the present invention is not limited to above-mentioned particular implementation
Example, and should be defined by the appended claims.
Claims (9)
1. a kind of particle concentration detection method, including：
Illumination is mapped on the reference gas of at least one particulate matter comprising concentration known, produce
Light scattering effect, and detect the light at least one light scattering angle using photodetector
Scattering strength, is used as the reference value of at least one particulate matter；
The illumination of same intensity is set to be mapped to treating comprising the unknown at least one particulate matter of concentration
Survey on gas, and the photodetector detects the light at least one described light scattering angle
On scattering strength, be used as the measured value of at least one particulate matter；And
According to particulate matter scattering principle, based on the reference value and the measured value, calculate described
The concentration of at least one particulate matter.
2. particle concentration detection method according to claim 1, wherein, to be measured
The quantity of light scattering angle is equal to or more than the quantity of at least one particulate matter.
3. particle concentration detection method according to claim 2, wherein, it is described at least
A kind of particulate matter includes particulate matter X, and its concentration is DPMX, and that photodetector A is detected
Reference values of the grain thing X in a light scattering angle is PA_PMX, for the particle that concentration is unknown
Thing X, it is assumed that particulate matter X concentration is CPMX, the measurement that the photodetector A is detected
It is worth for DA, then have
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Particulate matter X concentration C can be calculated according to above-mentioned formulaPMX。
4. particle concentration detection method according to claim 2, wherein, it is described at least
A kind of particulate matter includes two kinds of particles thing X and Y, and its concentration is respectively DPMXAnd DPMY, and
References of the particulate matter X and Y that photodetector A and B are detected in two light scattering angles
Value is respectively PA_PMX、PA_PMY, PB_PMX, and PB_PMY, for the particulate matter X that concentration is unknown
And Y, it is assumed that particulate matter X and Y concentration are respectively CPMXAnd CPMY, the photodetector
The measured value that A and B are detected respectively DAAnd DB, then have
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Particulate matter X and Y concentration C can be calculated according to above-mentioned formulaPMXAnd CPMY。
5. the particle concentration detection method according to one of claim 3-4, wherein, institute
It is bulky grain thing to state at least one particulate matter, its a diameter of about 10um.
6. the particle concentration detection method according to one of claim 3-4, wherein, institute
It is small particle to state at least one particulate matter, its a diameter of about 2.5um.
7. the particle concentration detection method according to one of claim 1-4, wherein, institute
It is photodiode to state photodetector.
8. particle concentration detection method according to claim 1, bag is mapped to making illumination
Before on the reference particles thing of at least one particulate matter containing concentration known, in addition to：
Reference gas is filled with region to be measured.
9. particle concentration detection method according to claim 1, makes same intensity
Before illumination is mapped in the under test gas comprising the unknown at least one particulate matter of concentration, also
Including：
Area filling to be measured is set to have the under test gas.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610248232.8A CN107305179A (en) | 2016-04-20 | 2016-04-20 | particle concentration detection method |
| PCT/CN2017/073967 WO2017181762A1 (en) | 2016-04-20 | 2017-02-17 | Particle concentration measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610248232.8A CN107305179A (en) | 2016-04-20 | 2016-04-20 | particle concentration detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107305179A true CN107305179A (en) | 2017-10-31 |
Family
ID=60115628
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610248232.8A Pending CN107305179A (en) | 2016-04-20 | 2016-04-20 | particle concentration detection method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107305179A (en) |
| WO (1) | WO2017181762A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504870A (en) * | 2020-05-15 | 2020-08-07 | 中国计量科学研究院 | Non-labeling method for detecting concentration of aggregate particles in sample at target particle size |
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| US6791691B2 (en) * | 2001-10-19 | 2004-09-14 | Fuji Photo Film Co., Ltd. | Measuring method and apparatus using attenuation in total internal reflection |
| FR3017952B1 (en) * | 2014-02-25 | 2016-05-06 | Commissariat Energie Atomique | METHOD FOR DETERMINING A LIPID CONCENTRATION IN A MICROORGANISM |
| CN104263837B (en) * | 2014-10-13 | 2016-03-23 | 江南大学 | The trimerical surface enhanced Raman scattering effect of golden nanometer particle modified based on triple beacon detects Hg in the aqueous solution 2+and/or Ag +method |
| CN204479442U (en) * | 2015-04-10 | 2015-07-15 | 中国石油大学(北京) | The on-line measuring device of gas pipe line endoparticle and drop |
| CN105486617A (en) * | 2015-11-27 | 2016-04-13 | 易轩 | Fine particle fast detector |
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2016
- 2016-04-20 CN CN201610248232.8A patent/CN107305179A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504870A (en) * | 2020-05-15 | 2020-08-07 | 中国计量科学研究院 | Non-labeling method for detecting concentration of aggregate particles in sample at target particle size |
| CN111504870B (en) * | 2020-05-15 | 2021-01-29 | 中国计量科学研究院 | Non-labeling method for detecting concentration of aggregate particles in sample at target particle size |
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| WO2017181762A1 (en) | 2017-10-26 |
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Application publication date: 20171031 |