CN207600892U - A kind of high-resolution aerosol grain size survey meter - Google Patents
A kind of high-resolution aerosol grain size survey meter Download PDFInfo
- Publication number
- CN207600892U CN207600892U CN201721813719.2U CN201721813719U CN207600892U CN 207600892 U CN207600892 U CN 207600892U CN 201721813719 U CN201721813719 U CN 201721813719U CN 207600892 U CN207600892 U CN 207600892U
- Authority
- CN
- China
- Prior art keywords
- laser
- grain size
- optical fiber
- light
- collimated
- 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.)
- Active
Links
Abstract
The utility model is related to a kind of high-resolution aerosol grain size survey meters, the output of high-capacity optical fiber laser is connect with optical fiber collimator input terminal, output terminal exports collimated laser beam, collimated laser beam injects Bao Weier prism and diverges to laser rays, laser rays is injected piano convex cylindrical lens and is collimated in diverging dimension, it is flat uniform focal beam spot that uniform laser line, which is collimated, through the convergence of aspherical focus lamp, focal beam spot is among two Mangin mirrors, particulate to be measured passes through focal beam spot to generate Mie scattering, scattering light, which enters in two Mangin mirrors, to be converged to respectively in two photodetectors, the electric impulse signal that the scattering light light intensity detected generates is respectively fed to handle in signal processing module, calculate aerosol grain size.The beneficial effects of the utility model：Light source power is high, and small particle aerosol also generates stronger scattered light signal；Light beam of light source quality is high, conducive to beam shaping；Converging beam uniform intensity distribution improves the resolution capability and counting efficiency of grain size.
Description
Technical field
The utility model is related to a kind of high-resolution aerosol grain size survey meters.
Background technology
There is Technical Sourcing Internation of the U.S. currently based on the aerosol grain size survey meter mainstream product of single-particle laser counting technology
3340 type laser aerosol grain size spectrometers and DMT companies of the U.S. passive chamber aerosol grain size spectrometer (PCASP-X2) and superelevation
Resolution ratio aerosol grain size spectrometer (UHSAS).The 3340 type laser aerosol grain size spectrometers that Technical Sourcing Internation of the U.S. produces measure 0.09
To the particulate matter of 7.5 μm of particle size ranges, in sampling flow 10cm3Maximum detection amount particle concentration 18000/cm during/min3, can survey
Amount 100 channel datas of output.The passive chamber aerosol grain size spectrometer PCASP-X2 of DMT companies of the U.S. measures particle size range
0.1-10 μm, sampling flow 1CC/sec, particle counting rate 10000/sec provides 40 data channel.DMT companies of the U.S.
Ultrahigh resolution aerosol grain size spectrometer UHSAS measures 0.06-1.0 μm, typical sampling flow 50CC/sec of particle size range, grain
Sub-count rate 3000/sec provides 99 data channel.
In order to measure small particle aerosol, frequently with the method for improving lasing light emitter irradiation power.TSI companies
Half intra cavity He-Ne laser technology of its patented technology is used in 3340 type laser aerosol grain size spectrometers, is swashed in resonator
Illumination is emanated sol particles, and when He-Ne laser output powers keep 5mW, irradiation luminous power has been increased to more than 1W.DMT
Company equally employs half intra-cavity He-Ne laser device illumination scheme in passive chamber aerosol grain size spectrometer PCASP-X2.
In order to measure more small particles in ultrahigh resolution aerosol grain size spectrometer UHSAS, irradiation power is further improved, is used
Half intracavity Nd3+ of 1054nm wavelength:YLiF4 solid state lasers, irradiation laser power density are more than 1kW/cm2.Using half
Intracavity laser has the advantages of irradiation power density big while less increase instrument cost, but half-intracavity laser is deposited
Debugging difficulty is big, engineer application is inconvenient the problem of.
Utility model content
Shortcoming present in regarding to the issue above, the utility model provide a kind of high-resolution aerosol grain size detection
Instrument improves the aerosol grain size Measurement Resolution of survey meter.
To achieve the above object, the utility model provides a kind of high-resolution aerosol grain size survey meter, including：High power
Optical fiber laser, optical fiber collimator, Bao Weier prism, piano convex cylindrical lens, aspherical focus lamp, Mangin mirror, the first photoelectricity are visited
Survey device, the second photodetector and signal processing module；
The output single mode optical fiber of the high-capacity optical fiber laser is connect with the input terminal of the optical fiber collimator, the light
The output terminal output collimated laser beam of fine collimator, collimated laser beam inject diverging one pen of generation after the Bao Weier prism
Directly, uniform laser rays, laser rays collimate after injecting the piano convex cylindrical lens in diverging dimension, collimation, uniform laser
Line is flat, uniform focal beam spot through the aspherical focus lamp convergence, and it is graceful that focal beam spot is located at placed side by side two
Among Jin Jing, particulate to be measured passes through focal beam spot to generate Mie scattering effect, and laser is scattered by particulate, scatters
Light is respectively enterd in two Mangin mirrors, and the scattering light of all angles converges to first photoelectricity respectively by described two Mangin mirrors
In detector and second photodetector, first photodetector and second photodetector will detect
The electric impulse signal that scattering light light intensity generates is respectively fed to handle in the signal processing module, calculates the big of aerosol grain size
It is small.
It is further improved as the utility model, the wavelength of the high-capacity optical fiber laser is 1.0 micron wavebands, is exported
Continuous laser, single mode optical fiber output, beam quality factor are better than 1.1, and Output optical power is not less than 2W.
It is further improved as the utility model, the fan beam angle of the Bao Weier prism output is not less than 10 °, production
Raw laser rays central part intensity variation is less than 30%.
It is further improved as the utility model, the optical fiber collimator is aspherical convex lens.
It is further improved as the utility model, further includes the light monitoring detector for exploring laser light power, the light
Monitoring detector is connected with the signal processing module.
The beneficial effects of the utility model are：
1st, light source power is high, and small particle aerosol can also generate stronger scattered light signal；
2nd, light beam of light source quality is high, is conducive to beam shaping；
3rd, converging beam uniform intensity distribution improves the resolution capability and counting efficiency of grain size.
Description of the drawings
Fig. 1 is a kind of schematic diagram of high-resolution aerosol grain size survey meter of the utility model.
In figure：
1st, high-capacity optical fiber laser；2nd, optical fiber collimator；3rd, Bao Weier prism；4th, piano convex cylindrical lens；5；It is aspherical
Focus lamp；6th, Mangin mirror；7th, the first photodetector；8th, the second photodetector；9th, light monitoring detector；10th, signal processing
Module.
Specific embodiment
As shown in Figure 1, a kind of high-resolution aerosol grain size survey meter of the utility model embodiment, including：High power
Optical fiber laser 1, optical fiber collimator 2, Bao Weier prism 3, piano convex cylindrical lens 4, aspherical focus lamp 5, Mangin mirror 6, first
Photodetector 7, the second photodetector 8 and signal processing module 10.
The output single mode optical fiber of high-capacity optical fiber laser 1 is connect with the input terminal of optical fiber collimator 2, optical fiber collimator 2
Output terminal output collimated laser beam, collimated laser beam inject Bao Weier prism 3 after diverging generate a straight, uniform laser
Line, laser rays collimate after injecting piano convex cylindrical lens 4 in diverging dimension, and collimation, uniform laser rays are through aspherical focus lamp 5
It converges as flat, uniform focal beam spot, focal beam spot is located among two Mangin mirrors 6 placed side by side, aerosol to be measured
Particle passes through focal beam spot to generate Mie scattering effect, and laser is scattered by particulate, and scattering light respectively enters two graceful gold
In mirror 6, the scattering light of all angles converges to the first photodetector 7 and the second photodetector 8 respectively by two Mangin mirrors 6
In, the first photodetector 7 and the second photodetector 8 send the electric impulse signal that the scattering light light intensity detected generates respectively
Enter and handled in signal processing module 10, calculate the size of aerosol grain size.Since scattering light light intensity is proportional to aerosol grain size
Diameter, therefore to receive the electric impulse signal amplitude that scattering light light intensity generates straight also proportional to aerosol grain size for photodetector
Diameter, signal processing module 10 can be calculated the size of aerosol grain size by the electric impulse signal amplitude that scattering light light intensity generates.
Wherein, for detecting small particle aerosol, the second photodetector 8 is used to detect big grain the first photodetector 7
Diameter aerosol, with reference to use, can be detected with the aerosol for ensureing various grain sizes, improve grain size resolution capability and
Counting efficiency.
Further, the wavelength of high-capacity optical fiber laser 1 is 1.0 micron wavebands, exports continuous laser, and single mode optical fiber is defeated
Go out, beam quality factor is better than 1.1, and Output optical power is not less than 2W, ensures the characteristics of light beam of light source quality is high in this way, is conducive to
Beam shaping.
Further, in order to ensure that laser beam not dissipate excessively, so that the focal beam spot of convergence is too small, can not ensure
Mie scattering effect, the fan beam angle that Bao Weier prism 3 exports is not less than 10 °, the laser rays central part light intensity of generation
Degree variation is less than 30%.
Further, optical fiber collimator 2 is aspherical convex lens, has more preferably radius of curvature, can maintain good
Lens error correction, to obtain required performance.
Further, further include the light monitoring detector 9 for exploring laser light power, light monitoring detector 9 at signal
Module 10 is managed to be connected.With optical attenuation piece on light monitoring detector 9, for the power stability of exploring laser light, in luminous power not
Correction signal intensity is used for when stablizing.In this way, may further ensure that the quality of light source, the resolution ratio of detection is improved.It is at this point, non-
Spherical surface focusing mirror 5, the first Mangin mirror 6-1, the second Mangin mirror 6-2, the first photodetector 7, the second photodetector 8 and light prison
Control detector 9 collectively forms the sampling cavity of a closing in addition to gas channels.The form of closing also more ensures to use
Accuracy and sensitivity in journey improve the resolution ratio of detection.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of high-resolution aerosol grain size survey meter, which is characterized in that including：High-capacity optical fiber laser (1), optical fiber are accurate
Straight device (2), Bao Weier prism (3), piano convex cylindrical lens (4), aspherical focus lamp (5), Mangin mirror (6), the first photodetection
Device (7), the second photodetector (8) and signal processing module (10)；
The output single mode optical fiber of the high-capacity optical fiber laser (1) is connect with the input terminal of the optical fiber collimator (2), described
The output terminal output collimated laser beam of optical fiber collimator (2), collimated laser beam inject the Bao Weier prism (3) and dissipate generation afterwards
One straight, uniform laser rays, laser rays are collimated in diverging dimension after injecting the piano convex cylindrical lens (4), are collimated,
Even laser rays is flat, uniform focal beam spot through aspherical focus lamp (5) convergence, and focal beam spot is located at and discharges
Two Mangin mirrors (6) put are intermediate, and particulate to be measured passes through focal beam spot to generate Mie scattering effect, and laser is by aerosol
KPT Scatter, scattering light are respectively enterd in two Mangin mirrors (6), and the scattering light of all angles is by described two Mangin mirrors (6) point
It does not converge in first photodetector (7) and second photodetector (8), first photodetector (7)
The electric impulse signal that the scattering light light intensity detected generates is respectively fed at the signal with second photodetector (8)
It manages in module (10) and handles, calculate the size of aerosol grain size.
2. high-resolution aerosol grain size survey meter according to claim 1, which is characterized in that the high-power fiber swashs
The wavelength of light device (1) is 1.0 micron wavebands, exports continuous laser, single mode optical fiber output, and beam quality factor is better than 1.1, output
Luminous power is not less than 2W.
3. high-resolution aerosol grain size survey meter according to claim 1, which is characterized in that the Bao Weier prism
(3) for the fan beam angle of output not less than 10 °, the laser rays central part intensity variation of generation is less than 30%.
4. high-resolution aerosol grain size survey meter according to claim 1, which is characterized in that the optical fiber collimator
(2) it is aspherical convex lens.
5. high-resolution aerosol grain size survey meter according to claim 1, which is characterized in that further include sharp for detecting
The light monitoring detector (9) of luminous power, the smooth monitoring detector (9) are connected with the signal processing module (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721813719.2U CN207600892U (en) | 2017-12-21 | 2017-12-21 | A kind of high-resolution aerosol grain size survey meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721813719.2U CN207600892U (en) | 2017-12-21 | 2017-12-21 | A kind of high-resolution aerosol grain size survey meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207600892U true CN207600892U (en) | 2018-07-10 |
Family
ID=62767001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721813719.2U Active CN207600892U (en) | 2017-12-21 | 2017-12-21 | A kind of high-resolution aerosol grain size survey meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207600892U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941665A (en) * | 2017-12-21 | 2018-04-20 | 北京厚力德仪器设备有限公司 | A kind of high-resolution aerosol particle diameter survey meter |
| CN112630127A (en) * | 2021-03-10 | 2021-04-09 | 中国科学院上海高等研究院 | Vacuum particle counter |
-
2017
- 2017-12-21 CN CN201721813719.2U patent/CN207600892U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941665A (en) * | 2017-12-21 | 2018-04-20 | 北京厚力德仪器设备有限公司 | A kind of high-resolution aerosol particle diameter survey meter |
| CN107941665B (en) * | 2017-12-21 | 2024-03-15 | 北京厚力德仪器设备有限公司 | High-resolution aerosol particle size detector |
| CN112630127A (en) * | 2021-03-10 | 2021-04-09 | 中国科学院上海高等研究院 | Vacuum particle counter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102564909B (en) | Laser self-mixing multi-physical parameter measurement method and device for atmospheric particulate | |
| CN106556556B (en) | The partial size of particle and the device and method of mass concentration in a kind of measurement flue dust | |
| CN207600892U (en) | A kind of high-resolution aerosol grain size survey meter | |
| JP4950314B2 (en) | Sensor and method for optically counting particles and determining particle size with high sensitivity | |
| CN104655539B (en) | Binary channels sensor of dust concentration and its dust concentration detecting method | |
| KR101857950B1 (en) | High accuracy real-time particle counter | |
| US9671325B2 (en) | Particle measuring device | |
| CN102033036B (en) | Light full-scattering type on-line granularity measurement device | |
| CN102680379B (en) | Device for classifying and counting white cells by using even high-order aspherical laser shaping system | |
| CN105651703A (en) | Method for measuring extinction coefficient of ring-down gas of optical cavity based on change of cavity length | |
| CN208459276U (en) | A kind of blood cell analysis device | |
| CN104007445A (en) | All-fiber laser radar aerosol detecting device | |
| CN102621063B (en) | Small-size oxygen measuring device based on porous material gas cell | |
| CN208206768U (en) | A kind of optical system | |
| CN107941665A (en) | A kind of high-resolution aerosol particle diameter survey meter | |
| CN205607812U (en) | Particle size detection device | |
| CN108181267B (en) | Small forward scattering visibility meter calibration system | |
| CN203101668U (en) | Dodging lens, dodging laser light source and optical system used for shaping semiconductor laser beam | |
| CN110441200B (en) | Laser measuring device | |
| CN115343256A (en) | Device and method for measuring gas concentration by sphere resonant cavity | |
| CN203909299U (en) | All-fiber laser radar aerosol detection device | |
| CN103779784B (en) | A kind of semiconductor laser for raman spectroscopy measurement | |
| CN108872100A (en) | A kind of multiple enhanced spectrum high-precision ammonia detection device and detection method | |
| CN208953128U (en) | Myriawatt power meter | |
| CN106290097B (en) | Dust concentration measuring device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |