CN108169083A - A kind of highly sensitive Particle size analysis methods in light blockage method particle collector - Google Patents
A kind of highly sensitive Particle size analysis methods in light blockage method particle collector Download PDFInfo
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- CN108169083A CN108169083A CN201611117777.1A CN201611117777A CN108169083A CN 108169083 A CN108169083 A CN 108169083A CN 201611117777 A CN201611117777 A CN 201611117777A CN 108169083 A CN108169083 A CN 108169083A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002245 particle Substances 0.000 title claims abstract description 32
- 238000003921 particle size analysis Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000007689 inspection Methods 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 101700004678 SLIT3 Proteins 0.000 description 1
- 102100027339 Slit homolog 3 protein Human genes 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
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
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- 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)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to the highly sensitive Particle size analysis methods in a kind of light blockage method particle collector, include the following steps：The laser facula shape for being irradiated to detection zone is changed into thin slit-type or windowing is thin slit-type before the detectors；Gone out by theoretical modeling when different-grain diameter is by slit detection zone, the height for blocking signal and signal of generation is in relation to the relationship before, width and shape；Least square fitting after being normalized by theory signal and actually measured signal, the width of main fitted signal determine the size of particle with shape.Make granularmetric analysis result more accurate using the method for the present invention, avoid beam cross section light intensity it is uneven caused by same particle size particle signal height difference caused by error.
Description
Technical field
The present invention relates to a kind of Particle size analysis methods of particle collector, specifically a kind of light blockage method particle collector
In highly sensitive Particle size analysis methods.
Background technology
Light blockage method particle collector is a kind of grain diameter and the instrument of takeoff, some granule densities it is relatively low or
There are many applications in terms of cleannes measurement.
The method of previous light blockage method particle collector analysis grain size is that the projected area based on particle blocks measuring beam section
The ratio of area when particle covers irradiating and detecting area by light, causes to decay after blocking to original light intensity, the height of deamplification
It is directly proportional to the size of grain diameter.Only differentiate that the size of grain diameter has drawback by the height of deamplification, such as
Beam cross section light distribution is non-uniform, and the intensity distribution in cross-section of general laser is into Gaussian Profile, so, when identical
The particle of grain size detection zone different location by when, the height of light intensity attenuation is inconsistent, so the grain size analyzed
It is different during size, will measurement cause very big error.
Invention content
For light blockage method particle collector in the prior art analysis grain size method there are measurement error it is big the deficiencies of, this hair
Bright technical problems to be solved are to provide a kind of highly sensitive granularmetric analysis side measured in accurate light blockage method particle collector
Method.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
Highly sensitive Particle size analysis methods in a kind of light blockage method particle collector of the present invention, include the following steps：
The laser facula shape for being irradiated to detection zone is changed into thin slit-type or windowing is thin slit before the detectors
Type；
Gone out by theoretical modeling when different-grain diameter is by slit detection zone, the block signal and the height of signal of generation have
It closes, the relationship before width and shape；
Least square fitting after being normalized by theory signal and actually measured signal, main fitted signal
Width and shape determine the size of particle.
The condition of simulation is that light intensity is uniformly distributed in beam cross section, obtains the height of signal and the knot that grain size is directly proportional
By.
The thin slit-type laser facula of detection zone is that windowing before the detectors is thin slit-type.
Thin slit width is 10~100 microns.
Thin slit width is 35 microns.
The invention has the advantages that and advantage：
1. make granularmetric analysis result more accurate using the method for the present invention, avoid beam cross section light intensity it is uneven caused by
Error caused by the signal height difference of same particle size particle.
Description of the drawings
Fig. 1 is the signal condition curve graph of the different-grain diameter of theoretical calculation of the present invention；
Fig. 2 is particle collector structure diagram of the present invention.
Wherein, 1 is laser, and 2 be sample cell, and 3 be slit, and 4 be detector.
Specific embodiment
The present invention is further elaborated with reference to the accompanying drawings of the specification.
Highly sensitive Particle size analysis methods in a kind of light blockage method particle collector of the present invention, include the following steps：
The laser facula shape for being irradiated to detection zone is changed into thin slit-type or windowing is thin slit before the detectors
Type；
Gone out by theoretical modeling when different-grain diameter is by slit detection zone, the block signal and the height of signal of generation have
It closes, the relationship before width and shape；
Least square fitting after being normalized by theory signal and actually measured signal, main fitted signal
Width and shape determine the size of particle
The condition of simulation is that light intensity is uniformly distributed in beam cross section, obtains the height of signal and the knot that grain size is directly proportional
By.
As shown in Fig. 2, it is thin slit 3 that the method for the present invention opens a window before detector 4, it can obtain thin slit-type in detection zone and swash
Light hot spot.The present embodiment can be used flexibly, usually 10-100 microns using 35 microns of wide slits in actual use
It is wide.
The present invention obtains drawing a conclusion by theoretical modeling：When different-grain diameter is by slit detection zone, generation is blocked
Signal has outside the Pass in addition to the height with signal, also has relationship with the width of signal and shape, this conclusion provides a kind of new grain
Diameter size analysis method, width and shape based on signal.As shown in Figure 1, the signal condition of the different-grain diameter for theoretical calculation.
The condition of simulation is that the distribution of light intensity in beam cross section is uniform, so the height of signal very grain size is directly proportional, but real
It is difficult uniform that beam cross section light intensity, which is, in border, thus when same particle size particle is by beam cross section different location signal height
Degree is different, so it is difficult to accurately analyze particle size values with signal height, mainly passes through the width of signal in the present invention
It spends and analyzes particle size with shape.
Grain diameter is analyzed with the method for the present invention, 50% accuracy rate can be improved.
Claims (5)
1. the highly sensitive Particle size analysis methods in a kind of light blockage method particle collector, it is characterised in that include the following steps：
The laser facula shape for being irradiated to detection zone is changed into thin slit-type or windowing is thin slit-type before the detectors；
Gone out by theoretical modeling when different-grain diameter is by slit detection zone, generation block signal it is related with the height of signal,
Relationship before width and shape；
Least square fitting after being normalized by theory signal and actually measured signal, the width of main fitted signal
Degree determines the size of particle with shape.
2. the highly sensitive Particle size analysis methods in light blockage method particle collector as described in claim 1, it is characterised in that：Mould
The condition of plan is that light intensity is uniformly distributed in beam cross section, obtains the height of signal and the conclusion that grain size is directly proportional.
3. the highly sensitive Particle size analysis methods in light blockage method particle collector as described in claim 1, it is characterised in that：Inspection
The thin slit-type laser facula for surveying area is that windowing before the detectors is thin slit-type.
4. the highly sensitive Particle size analysis methods in light blockage method particle collector as described in claim 3, it is characterised in that：Carefully
Slit width is 10~100 microns.
5. the highly sensitive Particle size analysis methods in light blockage method particle collector as described in claim 4, it is characterised in that：Carefully
Slit width is 35 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117777.1A CN108169083A (en) | 2016-12-07 | 2016-12-07 | A kind of highly sensitive Particle size analysis methods in light blockage method particle collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117777.1A CN108169083A (en) | 2016-12-07 | 2016-12-07 | A kind of highly sensitive Particle size analysis methods in light blockage method particle collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108169083A true CN108169083A (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611117777.1A Pending CN108169083A (en) | 2016-12-07 | 2016-12-07 | A kind of highly sensitive Particle size analysis methods in light blockage method particle collector |
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Citations (10)
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|---|---|---|---|---|
| WO2004036192A1 (en) * | 2002-10-10 | 2004-04-29 | Hydac Filtertechnik Gmbh | Method for reducing flow dependence of measuring appliances and associated device |
| CN101029863A (en) * | 2007-03-29 | 2007-09-05 | 上海大学 | Method and apparatus for on-line measuring microparticle in water |
| CN200962086Y (en) * | 2006-09-22 | 2007-10-17 | 天津市天大天发科技有限公司 | Light resistance sensing detection device |
| CN102590051A (en) * | 2012-02-17 | 2012-07-18 | 丹东市百特仪器有限公司 | Oblique incident laser particle analyzer |
| CN202522502U (en) * | 2012-02-17 | 2012-11-07 | 丹东市百特仪器有限公司 | Oblique incidence laser particle analyzer |
| CN104406894A (en) * | 2014-11-26 | 2015-03-11 | 东北电力大学 | Detecting device and detecting method for pollution degree of transparent oil particles |
| CN205120812U (en) * | 2015-09-30 | 2016-03-30 | 丹东百特仪器有限公司 | Current potential polarity measuring device during optical method granule zeta potential measurement |
| CN105486614A (en) * | 2015-12-25 | 2016-04-13 | 北京蓝柯工贸有限公司 | Method for manufacturing check block of insoluble liquid particle detection device and optical sample reservoir |
| CN205229008U (en) * | 2015-12-25 | 2016-05-11 | 北京蓝柯工贸有限公司 | A optics sample cell that is used for liquid infusibility particle detector of photoresistance method |
| CN105973772A (en) * | 2016-07-01 | 2016-09-28 | 丹东百特仪器有限公司 | Laser granularity measurement instrument with combination of dynamic and static light scattering |
-
2016
- 2016-12-07 CN CN201611117777.1A patent/CN108169083A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004036192A1 (en) * | 2002-10-10 | 2004-04-29 | Hydac Filtertechnik Gmbh | Method for reducing flow dependence of measuring appliances and associated device |
| CN200962086Y (en) * | 2006-09-22 | 2007-10-17 | 天津市天大天发科技有限公司 | Light resistance sensing detection device |
| CN101029863A (en) * | 2007-03-29 | 2007-09-05 | 上海大学 | Method and apparatus for on-line measuring microparticle in water |
| CN102590051A (en) * | 2012-02-17 | 2012-07-18 | 丹东市百特仪器有限公司 | Oblique incident laser particle analyzer |
| CN202522502U (en) * | 2012-02-17 | 2012-11-07 | 丹东市百特仪器有限公司 | Oblique incidence laser particle analyzer |
| CN104406894A (en) * | 2014-11-26 | 2015-03-11 | 东北电力大学 | Detecting device and detecting method for pollution degree of transparent oil particles |
| CN205120812U (en) * | 2015-09-30 | 2016-03-30 | 丹东百特仪器有限公司 | Current potential polarity measuring device during optical method granule zeta potential measurement |
| CN105486614A (en) * | 2015-12-25 | 2016-04-13 | 北京蓝柯工贸有限公司 | Method for manufacturing check block of insoluble liquid particle detection device and optical sample reservoir |
| CN205229008U (en) * | 2015-12-25 | 2016-05-11 | 北京蓝柯工贸有限公司 | A optics sample cell that is used for liquid infusibility particle detector of photoresistance method |
| CN105973772A (en) * | 2016-07-01 | 2016-09-28 | 丹东百特仪器有限公司 | Laser granularity measurement instrument with combination of dynamic and static light scattering |
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