CN107121366A - Open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path - Google Patents
Open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path Download PDFInfo
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- CN107121366A CN107121366A CN201610103849.0A CN201610103849A CN107121366A CN 107121366 A CN107121366 A CN 107121366A CN 201610103849 A CN201610103849 A CN 201610103849A CN 107121366 A CN107121366 A CN 107121366A
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- 238000005259 measurement Methods 0.000 title claims abstract description 49
- 239000000428 dust Substances 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 230000008033 biological extinction Effects 0.000 title claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000000149 argon plasma sintering Methods 0.000 description 4
- 235000010094 aprium Nutrition 0.000 description 2
- 239000008277 atmospheric particulate matter Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000000790 scattering method Methods 0.000 description 2
- 230000005250 beta ray Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012538 light obscuration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000009897 systematic effect Effects 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
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
- G01N15/0625—Optical scan of the deposits
Abstract
The invention discloses a kind of open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path, include laser group successively from left to right, beam expanding lens, semi-transparent semi-reflecting lens and prism of corner cube, semi-transparent semi-reflecting lens upper and lower ends are provided with reference to receiving terminal and measurement receiving terminal, laser group is made up of four lasers, the focus alignment of the optical axis and prism of corner cube of No. four lasers, the focus of semi-transparent semi-reflecting lens is aligned with the optical axis of No. four lasers, the focus of semi-transparent semi-reflecting lens is aligned with the focus of reference input plus lens, the focus of semi-transparent semi-reflecting lens is aligned with measuring the focus of input plus lens, the focus of semi-transparent semi-reflecting lens is aligned with prism of corner cube focus, the angle of the optical axis of semi-transparent semi-reflecting lens and laser is 45 °.The present invention not only reduces the difficulty of light path alignment, strengthens the freedom from vibration of system so that measurement light passes twice through measured zone, and such light path adds one times so that the Measurement Resolution of system is doubled.
Description
Technical field
The present invention relates to open light scattering airborne dust detection field, and in particular to a kind of opening based on reflected light path
Put formula airborne dust on-line monitoring system extinction ratio measurement device.
Background technology
The Atmospheric Particulate Matter of Beijing-tianjin-hebei Region has caused a series of social concern, for Synthetic
Atmospheric Particulate Matter is managed, environmental administration takes a series of measure, atmosphere particle concentration on-line monitoring
It is the most important thing for administering Particulate Pollution, airborne dust is administered as Beijing-tianjin-hebei Region Atmospheric particulates gridding
Important component, is particularly important for the on-line monitoring of airborne dust.Traditional airborne dust detecting instrument is main
Using weight method, β ray methods, micro oscillation sedimentation balance method and light scattering method.In existing monitoring instrument, only
The instrument for having light scattering method can accomplish real time on-line monitoring.
Most of light scattering method detecting instrument on current domestic and international market uses angular scattering method, and small part instrument is used
Light extinction method (total scattering), their measurement accuracy is high, and real-time is good.But for airborne dust distributed areas it is wide,
The characteristics of randomness is strong, change in concentration is big, it is desirable to quickly monitor the concentration and diffusion property of airborne dust, just
Need many such equipment design collecting and distributing type measuring systems and then correlation is drawn according to complicated data analysis
Information.Based on this feature, the Chen Wenliang of Tianjin Tongyang Technology Development Co., Ltd, plumcot China et al. invention
Long light path open airborne dust on-line monitoring system (number of patent application 2015205359203,
201510434402.7), solve existing based on angular scattering method and the measurement of part total scattering extraction-type particulate matter
The problem of extraction gas of principle of instrument, poor real, small measured zone.But Chen Wenliang, plumcot China etc.
The open airborne dust on-line monitoring system of long light path that people proposes uses correlation extinction ratio measurement unit, causes
During field application periphery can not be overcome to vibrate the significant errors brought to measurement signal, due to reference light
Ionization meter uses the feedback signal that laser is carried, and does not accomplish and measure optical signal to keep symmetrical parameter,
Cause signal noise big.2 points of the above all causes huge interference to the measurement result of system, it is impossible to ensure
The measurement accuracy of system.
The content of the invention
To solve the above problems, the invention provides a kind of open airborne dust on-line monitoring based on reflected light path
Systematic absences add than measurement apparatus and symmetrically refer to measuring device of light intensity with measurement light, invented and be based on
The reflection type optical path of prism of corner cube.
To achieve the above object, the technical scheme taken of the present invention is：
Open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path, from left to right according to
It is secondary including laser group, beam expanding lens, semi-transparent semi-reflecting lens and prism of corner cube, on semi-transparent semi-reflecting lens
Lower two ends are provided with reference to receiving terminal and measurement receiving terminal, and laser group is not to be by four wavelength
435nm, 520nm, 635nm, 780nm laser are constituted, the optical axis of No. four lasers and angle
The focus alignment of cone prism, the focus of semi-transparent semi-reflecting lens is aligned with the optical axis of No. four lasers,
The focus of semi-transparent semi-reflecting lens is aligned with the focus of reference input plus lens, semi-transparent semi-reflecting lens
Focus with measure input plus lens focus be aligned, the focus of semi-transparent semi-reflecting lens and angle
Cone prism focus is aligned, and the angle of the optical axis of semi-transparent semi-reflecting lens and laser is 45 °, laser
The light that device group is sent is divided into reflected light and transmitted light after semi-transparent semi-reflecting lens, semi-transparent semi-reflecting lens with
Incident light angle at 45 °, reflected light is directly entered the reference receiving terminal vertical with emergent light,
Then exported after photoelectric conversion unit, transmitted light reaches pyramid directly through measured zone
Prism, half is reached because the reflex backtracking of prism of corner cube again passes by measured zone
Enter measurement receiving terminal after saturating semi-reflective mirror.
Preferably, the reference receiving terminal and measurement receiving terminal use symmetrical structure.
Preferably, the reference receiving terminal is made up of photocell and optical filter, photocell and optical filtering
The distance between piece is 20mm.
Preferably, the measurement receiving terminal is made up of photocell and optical filter, photocell and optical filtering
The distance between piece is 20mm.
Preferably, beam expanding lens is provided between the laser group and semi-transparent semi-reflecting lens.
The invention has the advantages that：
Use symmetrical structure with reference to receiving terminal and measurement receiving terminal, constitute extinction ratio measurement unit, prism of corner cube should
With the difficulty that light path is aligned not only is substantially reduced, the freedom from vibration of system is strengthened, also causes measurement light two
Secondary to pass through measured zone, such light path adds one times so that the Measurement Resolution of system is doubled.
Brief description of the drawings
Fig. 1 is the principle schematic of the embodiment of the present invention.
Fig. 2 is open airborne dust on-line monitoring system extinction ratio measurement of the embodiment of the present invention based on reflected light path
Light path schematic diagram in device.
Fig. 3 is open airborne dust on-line monitoring system extinction ratio measurement of the embodiment of the present invention based on reflected light path
Laser assembly in device.
Fig. 4 is open airborne dust on-line monitoring system extinction ratio measurement of the embodiment of the present invention based on reflected light path
Semi-transparent semi-reflecting lens in device.
Fig. 5 is open airborne dust on-line monitoring system extinction ratio measurement of the embodiment of the present invention based on reflected light path
Prism of corner cube reflection unit in device.
Fig. 6 is open airborne dust on-line monitoring system extinction ratio measurement of the embodiment of the present invention based on reflected light path
Reference and measurement receiving terminal in device.
Fig. 7 is open airborne dust on-line monitoring system extinction ratio measurement of the embodiment of the present invention based on reflected light path
The overall installation diagram of device.
Embodiment
In order that objects and advantages of the present invention are more clearly understood, with reference to embodiments to present invention progress
It is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
As shown in Fig. 1-Fig. 7, supervised online the embodiments of the invention provide a kind of open airborne dust based on reflected light path
Examining system extinction ratio measurement device, by laser group, semi-transparent semi-reflecting lens, with reference to receiving terminal, pyramid
Prism and measurement receiving terminal composition, laser group is not to be by four wavelength
435nm, 520nm, 635nm, 780nm laser are constituted, the optical axis of No. four lasers and angle
The focus alignment of cone prism, the focus of semi-transparent semi-reflecting lens is aligned with the optical axis of No. four lasers,
The focus of semi-transparent semi-reflecting lens is aligned with the focus of reference input plus lens, semi-transparent semi-reflecting lens
Focus with measure input plus lens focus be aligned, the focus of semi-transparent semi-reflecting lens and angle
Cone prism focus is aligned, and the angle of the optical axis of semi-transparent semi-reflecting lens and laser is 45 °, laser
The light that device group is sent is divided into reflected light and transmitted light after semi-transparent semi-reflecting lens, semi-transparent semi-reflecting lens with
Incident light angle at 45 °, reflected light is directly entered the reference receiving terminal vertical with emergent light,
Then exported after photoelectric conversion unit, transmitted light reaches pyramid directly through measured zone
Prism, half is reached because the reflex backtracking of prism of corner cube again passes by measured zone
Enter measurement receiving terminal after saturating semi-reflective mirror.
The reference receiving terminal and measurement receiving terminal use symmetrical structure.
The reference receiving terminal is made up of photocell and optical filter.
The measurement receiving terminal is made up of photocell and optical filter.
Beam expanding lens is provided between the laser group and semi-transparent semi-reflecting lens.
This specific implementation uses symmetrical structure with reference to receiving terminal and measurement receiving terminal, constitutes extinction ratio measurement unit.
The application of prism of corner cube not only substantially reduces the difficulty of light path alignment, strengthens the freedom from vibration of system, also
So that measurement light passes twice through measured zone, such light path adds one times so that the Measurement Resolution of system
It is doubled.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these
Improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. the open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path, it is characterized in that, include laser group successively from left to right, beam expanding lens, semi-transparent semi-reflecting lens and prism of corner cube, semi-transparent semi-reflecting lens upper and lower ends are provided with reference to receiving terminal and measurement receiving terminal, it is not 435nm that laser group is by four wavelength, 520nm, 635nm, 780nm laser is constituted, the focus alignment of the optical axis and prism of corner cube of No. four lasers, the focus of semi-transparent semi-reflecting lens is aligned with the optical axis of No. four lasers, the focus of semi-transparent semi-reflecting lens is aligned with the focus of reference input plus lens, the focus of semi-transparent semi-reflecting lens is aligned with measuring the focus of input plus lens, the focus of semi-transparent semi-reflecting lens is aligned with prism of corner cube focus, the angle of the optical axis of semi-transparent semi-reflecting lens and laser is 45 °, the light that laser group is sent is divided into reflected light and transmitted light after semi-transparent semi-reflecting lens, semi-transparent semi-reflecting lens and incident light angle at 45 °, reflected light is directly entered the reference receiving terminal vertical with emergent light, then exported after photoelectric conversion unit, transmitted light reaches prism of corner cube directly through measured zone, backtracking, which again passes by measured zone and reached, enters measurement receiving terminal after semi-transparent semi-reflecting lens.
2. the open airborne dust on-line monitoring system extinction ratio measurement device according to claim 1 based on reflected light path, it is characterised in that the reference receiving terminal and measurement receiving terminal use symmetrical structure.
3. the open airborne dust on-line monitoring system extinction ratio measurement device according to claim 1 based on reflected light path, it is characterised in that the reference receiving terminal is made up of photocell and optical filter, the distance between photocell and optical filter are 20mm.
4. the open airborne dust on-line monitoring system extinction ratio measurement device according to claim 1 based on reflected light path, it is characterised in that the measurement receiving terminal is made up of photocell and optical filter, the distance between photocell and optical filter are 20mm.
5. the open airborne dust on-line monitoring system extinction ratio measurement device according to claim 1 based on reflected light path, it is characterised in that beam expanding lens is provided between the laser group and semi-transparent semi-reflecting lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103849.0A CN107121366A (en) | 2016-02-25 | 2016-02-25 | Open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103849.0A CN107121366A (en) | 2016-02-25 | 2016-02-25 | Open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path |
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| Publication Number | Publication Date |
|---|---|
| CN107121366A true CN107121366A (en) | 2017-09-01 |
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| CN201610103849.0A Pending CN107121366A (en) | 2016-02-25 | 2016-02-25 | Open airborne dust on-line monitoring system extinction ratio measurement device based on reflected light path |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1424572A (en) * | 2003-01-10 | 2003-06-18 | 东南大学 | Laser light scattering dust concentration on line measuring method |
| CN2563570Y (en) * | 2002-08-28 | 2003-07-30 | 宝山钢铁股份有限公司 | Laser dust concentration detector |
| CN1873466A (en) * | 2005-05-30 | 2006-12-06 | 成序三 | Optical system for synthesizing multi laser beams and method |
| CN102564909A (en) * | 2011-11-29 | 2012-07-11 | 中国科学院安徽光学精密机械研究所 | Laser self-mixing multi-physical parameter measurement method and device for atmospheric particulate |
| CN203929036U (en) * | 2014-05-30 | 2014-11-05 | 湖北工业大学 | A kind of device that utilizes diffraction light-free to measure guide rail four-degree-of-freedom kinematic error |
| CN205374239U (en) * | 2016-02-25 | 2016-07-06 | 天津同阳科技发展有限公司 | Open raise dust on -line monitoring system extinction ratio measuring device based on reflected light path |
-
2016
- 2016-02-25 CN CN201610103849.0A patent/CN107121366A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563570Y (en) * | 2002-08-28 | 2003-07-30 | 宝山钢铁股份有限公司 | Laser dust concentration detector |
| CN1424572A (en) * | 2003-01-10 | 2003-06-18 | 东南大学 | Laser light scattering dust concentration on line measuring method |
| CN1873466A (en) * | 2005-05-30 | 2006-12-06 | 成序三 | Optical system for synthesizing multi laser beams and method |
| CN102564909A (en) * | 2011-11-29 | 2012-07-11 | 中国科学院安徽光学精密机械研究所 | Laser self-mixing multi-physical parameter measurement method and device for atmospheric particulate |
| CN203929036U (en) * | 2014-05-30 | 2014-11-05 | 湖北工业大学 | A kind of device that utilizes diffraction light-free to measure guide rail four-degree-of-freedom kinematic error |
| CN205374239U (en) * | 2016-02-25 | 2016-07-06 | 天津同阳科技发展有限公司 | Open raise dust on -line monitoring system extinction ratio measuring device based on reflected light path |
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Application publication date: 20170901 |
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