CN107132164A - Dust concentration monitor - Google Patents
Dust concentration monitor Download PDFInfo
- Publication number
- CN107132164A CN107132164A CN201710407868.7A CN201710407868A CN107132164A CN 107132164 A CN107132164 A CN 107132164A CN 201710407868 A CN201710407868 A CN 201710407868A CN 107132164 A CN107132164 A CN 107132164A
- Authority
- CN
- China
- Prior art keywords
- feeler lever
- light
- dust concentration
- light intensity
- intensity sensor
- 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.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 13
- 239000004071 soot Substances 0.000 claims abstract description 7
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 230000004888 barrier function Effects 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 239000003500 flue dust Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004848 nephelometry Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000779 smoke Substances 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
-
- G01N15/075—
Abstract
The invention belongs to environment supervision instrument field, it is related to a kind of dust concentration monitor, solves the problem of existing dust concentration monitor sensitivity and measurement accuracy are influenceed larger by the change of size and variations in refractive index of soot dust granule thing.Dust concentration monitor also includes light path pipe, its feeler lever is divided into first paragraph and second segment, the first paragraph and second segment of feeler lever are coaxially separated, the light path pipe axially penetrates through the first paragraph and second segment of feeler lever along feeler lever, and be connected with window mirror, scattered light intensity sensor is sequentially provided with to the right along position level of the light path pipe on feeler lever axisymmetrical in the first paragraph of feeler lever, transmitted light intensity sensor and condenser lens, right-angle prism is provided with the second segment of the feeler lever, the right-angle prism is equilateral right-angle prism, the inclined-plane of right-angle prism is towards light source and parallel with the normal section of feeler lever, the output end connection signal processing module of scattered light intensity sensor and transmitted light intensity sensor.
Description
Technical field
The invention belongs to environment supervision instrument field, more particularly to a kind of dust concentration monitor.
Background technology
Raising with people to environmental quality requirement, the pollution of flue dust also result in the extensive attention of people, country
Formulated the relevant laws and regulations of the more minimum discharge of strict emission standards, soot emissions monitoring be environmental monitoring important content it
One.The detection of current dust concentration uses nephelometry or light back-scatteringme thod mostly.When nephelometry detects dust concentration, measurement spirit
Sensitivity is not high, and when being detected to low concentration flue dust, it may appear that larger error, at the same this metering system to optical path requirements compared with
Height, installs complicated；Light back-scatteringme thod installs simple, and accuracy of detection is higher, but by the change of size and folding of soot dust granule thing
The influence for penetrating rate change is larger, influences its sensitivity and measurement accuracy.
The content of the invention
It is an object of the invention to solve existing dust concentration monitor sensitivity and measurement accuracy by soot dust granule thing
The problem of influence of change of size and variations in refractive index is larger, and there is provided a kind of dust concentration monitor.
The technical scheme is that：
Dust concentration monitor, including host shell and feeler lever, feeler lever are connected with host shell, are set in the host shell
Have on light source and signal processing module, host shell with light source just to position set window mirror, it is characterised in that：Also include light
Lu Guan, the feeler lever is divided into first paragraph and second segment, and the first paragraph and second segment of feeler lever are coaxially separated, and the light path pipe is along feeler lever
The first paragraph and second segment of feeler lever are axially penetrated through, and is connected with window mirror,
Scattered light intensity is sequentially provided with to the right along position level of the light path pipe on feeler lever axisymmetrical in the first paragraph of feeler lever
Right-angle prism is provided with sensor, transmitted light intensity sensor and condenser lens, the second segment of the feeler lever, the right-angle prism is
Equilateral right-angle prism, the inclined-plane of right-angle prism is towards light source and parallel with the normal section of feeler lever, scattered light intensity sensor and transmission
The output end connection signal processing module of light intensity sensor；The light that light source is sent injects light path pipe, through the secondary reflection of right-angle prism two
Afterwards, soot dust granule is reversely injected, line focus lens focus is on scattered light intensity sensor and transmitted light intensity sensor.
Further, the right-angle prism is made up of two equilateral right-angle prisms of identical, two equilateral right-angle prism edges
Feeler lever axisymmetrical is set.
Further, in addition to swivel becket, swivel becket is located in transmitting light path and positioned between light source and window mirror, described
Swivel becket includes attenuator and light barrier, and attenuator and light barrier are symmetricly set on transmitting light path both sides.
Further, in addition to luminosity compensation device, the luminosity compensation device is sensed by Amici prism and reference light intensity
Device is constituted, and the Amici prism is inclined in the front of light source, the angle a of Amici prism and horizontal direction, 90 °<a<It is 180 °, described
Reference light intensity sensor be fixed on the lower section of Amici prism, the light of reflection is transmitted to reference light intensity sensor by Amici prism, is joined
Output end than light intensity sensor connects signal processing module.
Further, the Amici prism and the angle a of horizontal direction are 135 °.
Further, the Amici prism is located in the region that swivel becket is surrounded.
Further, in addition to blow device, the blow device is made up of blower fan and flexible pipe, the air inlet and wind of flexible pipe
Machine is connected, and gas outlet is connected with host shell.
Further, an air admission hole, gas outlet of the air admission hole just to flexible pipe are provided with the light path pipe.
Further, a diameter of 12mm of the air admission hole.
Compared with prior art, the advantage of the invention is that：
1st, scattered light intensity sensor can detect scattered light intensity, and transmitted light intensity sensor can detect transmitted light intensity, by this
Two signals, which are calculated, can obtain tested soot dust granule thing concentration, and this detection method essentially eliminates the grain of particulate matter
Footpath changes the influence to apparatus measures result with variations in refractive index, improves sensitivity and the resolution ratio of instrument detection.
If the 2, the light intensity of light source changes, the light intensity that light source can be detected by reference light intensity sensor changes and carried out
Compensation.
3rd, light barrier can block the light beam that light source is sent, and light beam cannot be introduced into flue dust space, transmitted light intensity sensor and
Scattered light intensity sensor does not receive light intensity signal, realizes zero point correction；Attenuator can simulate certain dust concentration value, light source
The light beam sent is received after attenuator enters flue dust space by sensor, so as to realize range calibration.
4th, the blow device can form protection air curtain before window mirror and condenser lens, prevent flue dust to be stained with optics
On, cause apparatus measures error；The presence of blow device substantially reduces the maintenance of instrument simultaneously.
5th, air admission hole is opened up on light path pipe, blow device can be blown to gas in feeler lever second segment by light path pipe,
Air curtain protection is formed around right-angle prism.
Brief description of the drawings
Fig. 1 is the internal structure schematic diagram of dust concentration monitor of the embodiment of the present invention.
In figure：1st, host shell, 2, feeler lever, 3, light path pipe, 4, light source, 5, swivel becket, 6, window mirror, 7, equilateral right-angled edge
Mirror, 8, condenser lens, 9, transmitted light intensity sensor, 10, scattered light intensity sensor, 11, Amici prism, 12, reference light intensity sensing
Device, 13, signal processing module, 14, blower fan, 15, flexible pipe, 16, ring flange, 501, light barrier, 502, attenuator.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail：
As shown in figure 1, dust concentration monitor, including host shell 1 and feeler lever 2, feeler lever 2 is connected with host shell 1, institute
State and light source 4 and signal processing module 13 be provided with host shell 1, the inwall of host shell 1 and light source 4 just to position window is set
Mirror 6,2 points of the feeler lever is first paragraph and second segment, and the first paragraph and second segment of feeler lever 2 are coaxially separated, the dust concentration prison
Surveying instrument also includes light path pipe 3, and the light path pipe 3 axially penetrates through the first paragraph and second segment of feeler lever along feeler lever, and connects with window mirror 6
Connect, scattered light intensity sensing is set gradually to the right on the position level of feeler lever axisymmetrical along light path pipe 3 in the first paragraph of feeler lever 2
Provided with two equilateral right-angle prisms 7, two in device 10, transmitted light intensity sensor 9 and condenser lens 8, the second segment of the feeler lever
Equilateral right-angle prism 7 is set along feeler lever axisymmetrical, is combined into a new equilateral right-angle prism, the equilateral right-angle prism it is oblique
Face is towards light source and parallel with the normal section of feeler lever；
In measurement, for example：Light source 4 sends 650nm laser beam, reflects laggard by two equilateral right-angle prisms 7
Enter flue dust space, laser beam is with producing transmitted light and scattered light after smoke particle effect, transmitted light and forward scattering light are by poly-
Focus lens 8 reach transmitted light intensity sensor 9 and scattered light intensity sensor 10, scattered light intensity sensor 10 and transmitted light intensity sensor
9 output end connection signal processing module 13, signal processing module 13 will penetrate optical sensor 10 and transmitted light intensity sensor 9 is transmitted
The optical signal come is converted to electric signal, is closed according to the change of transmitted light intensity and scattered light intensity and dust concentration into certain ratio
System, you can obtain dust concentration.
Dust concentration monitor also includes luminosity compensation device and the self-checking device being arranged in host shell 1.
Compensation device is made up of Amici prism 11 and reference light intensity sensor 12, if the light intensity of light source 4 changes, can be by reference
The light intensity that light intensity sensor 12 detects light source 4 changes and is transferred to signal processing module 13, then passes through signal processing module 13
Compensate.
The self-checking device is swivel becket 5, swivel becket 5 be located in transmitting light path and positioned at light source 4 and window mirror 6 it
Between, the swivel becket 5 includes attenuator 502 and light barrier 501, and attenuator 502 and light barrier 501 are symmetricly set on transmitting light path
Both sides, can drive Rotation With Changing to rotate to different positions, realize zero point, range calibration by motor.
Dust concentration detector also includes blow device, and blow device is made up of blower fan 14 and flexible pipe 15.Flexible pipe two ends point
Other connecting fan 14 and host shell 1, when blow device is opened, purging motor is in window mirror 6, condenser lens 8 and equilateral
Protection air curtain is formed before right-angle prism 7, prevents flue dust to be attached on optical element, substantially reduces the maintenance of instrument.
Claims (9)
1. dust concentration monitor, including host shell (1) and feeler lever (2), feeler lever (2) are connected with host shell, the main frame
Be provided with housing (1) on light source (4) and signal processing module (13), host shell (1) with light source (4) just to position setting window
Mouth mirror (6), it is characterised in that：Also include light path pipe (3), the feeler lever (2) is divided into first paragraph and second segment, the of feeler lever (2)
One section and second segment are coaxially separated, and the light path pipe (3) axially penetrates through the first paragraph and second segment of feeler lever along feeler lever (2), and with
Window mirror (6) is connected,
Scattered light is sequentially provided with to the right along position level of the light path pipe (3) on feeler lever axisymmetrical in the first paragraph of feeler lever (2)
Right-angled edge is provided with strong sensor (10), transmitted light intensity sensor (9) and condenser lens (8), the second segment of the feeler lever (2)
Mirror, the right-angle prism is equilateral right-angle prism, and the inclined-plane of right-angle prism is towards light source and parallel with the normal section of feeler lever, scattering
The output end connection signal processing module (13) of light intensity sensor (10) and transmitted light intensity sensor (9)；The light that light source (4) is sent
Light path pipe (3) is injected, after the secondary reflection of right-angle prism two, soot dust granule is reversely injected, line focus lens (8) focus on scattered light
On strong sensor (10) and transmitted light intensity sensor (9).
2. dust concentration monitor according to claim 1, it is characterised in that：The right-angle prism is by two identicals etc.
Side right-angle prism (7) is constituted, and two equilateral right-angle prisms (7) are set along feeler lever axisymmetrical.
3. dust concentration monitor according to claim 2, it is characterised in that：Also include swivel becket (5), swivel becket is located at
Launch in light path and positioned between light source (4) and window mirror (6), the swivel becket includes attenuator (502) and light barrier
(501), attenuator (502) and light barrier (501) are symmetricly set on transmitting light path both sides.
4. the dust concentration monitor according to claim 1 or 2 or 3, it is characterised in that：Also include luminosity compensation device,
The luminosity compensation device is made up of Amici prism (11) and reference light intensity sensor (12), and the Amici prism (11) is inclined in
The front of light source (4), the angle a of Amici prism (11) and horizontal direction, 90 °<a<180 °, described reference light intensity sensor
(12) lower section of Amici prism is fixed on, the light of reflection is transmitted to reference light intensity sensor (12), reference light by Amici prism (11)
The output end connection signal processing module (13) of strong sensor (12).
5. dust concentration monitor according to claim 4, it is characterised in that：The Amici prism (11) and horizontal direction
Angle a be 135 °.
6. dust concentration monitor according to claim 5, it is characterised in that：The Amici prism (11) is located at swivel becket
(5) in the region surrounded.
7. dust concentration monitor according to claim 6, it is characterised in that：Also include blow device, the purging dress
Put and be made up of blower fan (14) and flexible pipe (15), the air inlet of flexible pipe (15) is connected with blower fan (14), gas outlet and host shell (1)
It is connected.
8. dust concentration monitor according to claim 7, it is characterised in that：One is provided with the light path pipe (3) to enter
Stomata, gas outlet of the air admission hole just to flexible pipe (15).
9. dust concentration monitor according to claim 8, it is characterised in that：A diameter of 12mm of the air admission hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407868.7A CN107132164A (en) | 2017-06-02 | 2017-06-02 | Dust concentration monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407868.7A CN107132164A (en) | 2017-06-02 | 2017-06-02 | Dust concentration monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107132164A true CN107132164A (en) | 2017-09-05 |
Family
ID=59734390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710407868.7A Pending CN107132164A (en) | 2017-06-02 | 2017-06-02 | Dust concentration monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107132164A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631911A (en) * | 2017-10-23 | 2018-01-26 | 西安思坦科技有限公司 | A kind of nido multi-channel sampling device |
| CN107687962A (en) * | 2017-10-23 | 2018-02-13 | 西安思坦科技有限公司 | A kind of individual well undisturbed sampler |
| CN108760687A (en) * | 2018-04-08 | 2018-11-06 | 深圳市天环通科技有限公司 | Laser light scattering cooking fume instrument |
| CN108956407A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of optical path aggregation infrastructure |
| CN108956406A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of smoke intensity detection optical system and its method |
| CN109520903A (en) * | 2018-12-20 | 2019-03-26 | 南京波瑞自动化科技有限公司 | A kind of double light path laser forward scattering measuring concentration of granules in certain device |
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| CN2563570Y (en) * | 2002-08-28 | 2003-07-30 | 宝山钢铁股份有限公司 | Laser dust concentration detector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631911A (en) * | 2017-10-23 | 2018-01-26 | 西安思坦科技有限公司 | A kind of nido multi-channel sampling device |
| CN107687962A (en) * | 2017-10-23 | 2018-02-13 | 西安思坦科技有限公司 | A kind of individual well undisturbed sampler |
| CN108760687A (en) * | 2018-04-08 | 2018-11-06 | 深圳市天环通科技有限公司 | Laser light scattering cooking fume instrument |
| CN108956407A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of optical path aggregation infrastructure |
| CN108956406A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of smoke intensity detection optical system and its method |
| CN108956407B (en) * | 2018-09-21 | 2023-09-19 | 安徽农业大学 | Light path converging structure |
| CN108956406B (en) * | 2018-09-21 | 2023-09-19 | 安徽农业大学 | Smoke detection optical system and method thereof |
| CN109520903A (en) * | 2018-12-20 | 2019-03-26 | 南京波瑞自动化科技有限公司 | A kind of double light path laser forward scattering measuring concentration of granules in certain device |
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