CN109187296A - A kind of laser PM2.5 dust sensor with self-purifying system - Google Patents
A kind of laser PM2.5 dust sensor with self-purifying system Download PDFInfo
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- CN109187296A CN109187296A CN201811020853.6A CN201811020853A CN109187296A CN 109187296 A CN109187296 A CN 109187296A CN 201811020853 A CN201811020853 A CN 201811020853A CN 109187296 A CN109187296 A CN 109187296A
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- laser
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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
- G01N15/06—Investigating concentration of particle suspensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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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
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of laser PM2.5 dust sensor with self-purifying system, it includes sensor body, fan, detection system and purification system, the purification system is fixed in sensor body, the purification system includes purge pipe, purification cavity and filter assemblies, the purge pipe is equipped with inlet end and outlet side, the filter assemblies are installed in purify cavity body, and inlet end and outlet side are separated in the two sides of filter assemblies, the outlet side is connected to sensor body and towards the surface of detection system；The present invention is by being equipped with purification system; and it handles to obtain the purification gas of clean free from admixture using the purification system; one layer of protection air film is formed on detection system surface using purification gas; dust and particulate matter is set not to be deposited on detection system surface; to ensure that the detection accuracy of laser PM2.5 dust sensor, the service life of laser PM2.5 dust sensor is extended.
Description
Technical field
The present invention relates to laser PM2.5 dust sensor technical fields, more particularly to a kind of swashing with self-purifying system
Light PM2.5 dust sensor.
Background technique
PM2.5 dust is the component that content is seldom in earth atmosphere ingredient, but it has air quality and visibility etc.
Important influence.Compared with thicker Atmospheric particulates, PM2.5 grain diameter is small, rich in a large amount of poisonous and harmful substances and
Residence time length, conveying distance in atmosphere is remote, thus the influence to human health and atmosphere quality is bigger.In order to monitor
The quality of air environment generallys use the detection device with laser PM2.5 dust sensor, detects to air.
And existing laser PM2.5 dust sensor use environment is more complicated, it will usually be related to high temperature, high humidity or height
Dust etc. detects environment, and needs to keep long-term in the detection process to exchange with ambient atmos, in long-term use process
In because dust accumulation problem cause laser PM2.5 dust sensor detection accuracy decline, reduced service life the phenomenon that.
In view of this, the present inventor is perfect caused for not attaining in the design of above-mentioned laser PM2.5 dust sensor structure
Many missings and inconvenience, and deeply conceive, and actively research improvement has a fling at and develops and design the present invention.
Summary of the invention
The purpose of the present invention is to provide a kind of long service life, the high laser with self-purifying system of detection accuracy
PM2.5 dust sensor.
In order to achieve the above objectives, solution of the invention is:
A kind of laser PM2.5 dust sensor with self-purifying system comprising sensor body, fan and detection system,
The gas outlet that the sensor body is equipped with air inlet and is connected to air inlet, forms between the air inlet and gas outlet
Airflow channel, the fan are installed in airflow channel, and the inside of sensor body, the laser is arranged in the detection system
PM2.5 dust sensor further includes purification system, and the purification system is fixed in sensor body, and the purification system includes
Purge pipe, purification cavity and filter assemblies, the purge pipe are equipped with inlet end and outlet side, the purify cavity position
In in purge pipe, the filter assemblies are installed in purify cavity body, and inlet end and outlet side are separated in filter assemblies
Two sides, the outlet side is connected to sensor body and towards the surface of detection system.
The detection system includes laser diode, lens, photodiode and light absorbing element, the laser diode
The side of airflow channel is cooperatively connected and is installed in lens, and with matching, it is logical that the photodiode is installed in air-flow
In road, and it is located at the side for the detection laser that laser diode generates, light absorbing element is fixed in sensor body and sets
There are loophole and extinction chamber, extinction chamber is connected to by loophole with airflow channel, and the inspection that laser diode generates
Laser is surveyed to be threaded through in loophole.
The purge pipe is set there are two outlet side: the first outlet side and the second outlet side, the first outlet side and second go out
Gas end is connected to sensor body, and the first outlet side is towards the surface of photodiode, and the second outlet side is towards lens
Surface.
The inlet end of the purge pipe is connected to and is located at the air outlet of fan with airflow channel.
The filter assemblies include at least one layer of strainer, and the strainer is installed in purify cavity body.
After adopting the above scheme, a kind of laser PM2.5 dust sensor with self-purifying system of the present invention, it is net by being equipped with
Change system, and handle to obtain the purification gas of clean free from admixture using the purification system, on the detection system using purification gas
One layer of protection air film is formed, so that detection system not will receive the pollution of PM2.5 particle in gas to be detected, to guarantee
The detection accuracy of laser PM2.5 dust sensor, extends the service life of laser PM2.5 dust sensor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present pre-ferred embodiments；
Fig. 2 is the cross-sectional view in Fig. 1 at A-A；
Fig. 3 is the cross-sectional view in Fig. 1 at B-B.
Specific embodiment
In order to further explain the technical solution of the present invention, being explained in detail below by specific embodiment the present invention
It states.
It as shown in Figure 1 to Figure 3, is a kind of preferable reality of the laser PM2.5 dust sensor with self-purifying system of the present invention
Apply example comprising sensor body 1, fan 2 and detection system 3, sensor body 1 are equipped with air inlet 11 and and air inlet
The gas outlets 12 of 11 connection of mouth form airflow channel 13, are equipped with fan in airflow channel 13 between air inlet 11 and gas outlet 12
2, gas to be detected can be pumped into inside sensor body 1 by fan 2 from air inlet 11, and be discharged from gas outlet 12.
The inside of sensor body 1 is arranged in said detecting system 3, and detection system 3 includes laser diode 31, lens
32, photodiode 33 and light absorbing element 34, laser diode 31 and lens 32 are cooperatively connected and are installed in airflow channel 13
Side, with matching, photodiode 33 is installed in airflow channel 13, and be located at laser diode 31 generate
The side of laser is detected, light absorbing element 34 is fixed in sensor body 1 and is equipped with loophole 341 and extinction chamber 342,
Extinction chamber 342 is connected to by loophole 341 with airflow channel 13, and the detection laser that laser diode 31 generates is threaded through
In loophole 341.
In use, gas to be detected can be pumped into inside sensor body 1 by fan 2 from air inlet 11, to
Detection gas smoothly flow in airflow channel 13, meanwhile, laser diode 31 generates detection laser, and in the focusing of lens 32
Under effect, detection laser can pass through gas to be detected, and pass through gas to be detected when some light can be radiated at it is to be detected
On PM2.5 particle in gas, scattering phenomenon, scattering light meeting directive photodiode 33, at this point, photodiode are then generated
33 can receive scattering light and scattered light signal is converted to electric signal, be completed at the same time the detection work of gas to be detected.In addition,
The light not being radiated on PM2.5 particle can be injected into extinction chamber 342 by loophole 341, the quilt in extinction chamber 342
It absorbs, avoids the light not being radiated on PM2.5 particle and be radiated on the inner wall of sensor body 1 and in airflow channel 13
Scattering phenomenon is generated, to influence the detected value for treating detection gas of detection system 3.Gas to be detected is in airflow channel 13
After tested, it is discharged by airflow channel 13 by gas outlet 12 under the action of fan 2.
Above-mentioned laser PM2.5 dust sensor further includes purification system 4, and purification system 4 is fixed in sensor body 1,
Purification system 4 includes purge pipe 41, purification cavity 42 and filter assemblies 43, purge pipe 41 be equipped with inlet end 411 and
Outlet side 412, purification cavity 42 are located in purge pipe 41, and filter assemblies 43, which are installed in, to be purified in cavity 42, and by air inlet
End 411 separates with outlet side 412 in the two sides of filter assemblies 43, as shown in Figure 1, in the present embodiment, purge pipe 41 is equipped with
Two outlet sides, 412: the first outlet side 4121 and the second outlet side 4122, the first outlet side 4121 and the second outlet side 4122 are
It is connected to sensor body 1, and the first outlet side 4121 is towards the surface of photodiode 33,4122 direction of the second outlet side
The surface of lens 32.
In use, purification gas can flow to outlet side 412 from the inlet end 411 of purge pipe 41, and
During outlet side 412 is flowed to from inlet end 411, can by the purification cavity 42 that is located in purge pipe 41, and by
To the filtration of filter assemblies 43, the impurity in purification gas can be filtered out by filter assemblies 43, so that 412 row of outlet side
Purification gas out is clean free from admixture, and the purification gas of clean free from admixture is directly blown after being discharged from outlet side 412 in photoelectricity
On the surface of diode 33 and lens 32, it is equivalent to one layer of protection gas of formation on the surface of photodiode 33 and lens 32
Film, so that photodiode 33 and lens 32 not will receive the pollution of PM2.5 particle in gas to be detected, to improve
The detection accuracy of laser PM2.5 dust sensor, extends the service life of laser PM2.5 dust sensor.
The inlet end 411 of above-mentioned purge pipe 41 is connected to and is located at the air outlet of fan 2 with airflow channel 13, is using
In the process, gas to be detected can be pumped into inside sensor body 1 by fan 2 from air inlet 11, and be discharged from gas outlet 12,
Part gas to be detected can be blown into only by fan 2 while gas to be detected is discharged from gas outlet 12 from inlet end 411
Change in pipeline 41, so that part gas to be detected becomes purification gas.In this way, utilizing laser PM2.5 dust sensor itself
Component and gas to be detected realize protective effect of the purification system 4 to detection system 3, to reduce laser PM2.5 powder
The manufacturing cost and use cost of dust sensor.
Above-mentioned filter assemblies 43 include at least one layer of strainer 431, and strainer 431 is installed in purification cavity 42, pass through increase
The setting number of plies of strainer 431 can reinforce filtration of the filter assemblies 43 to purification gas, so that outlet side 412 was discharged
The cleaner free from admixture of purification gas；Also, it can also be selected not according to the partial size of the impurity in purification gas and flow
The strainer 431 of same specification, to guarantee filtration of the filter assemblies 43 to purification gas.
Above-described embodiment and schema and non-limiting product form and style of the invention, any technical field it is common
The appropriate changes or modifications that technical staff does it all should be regarded as not departing from patent category of the invention.
Claims (5)
1. a kind of laser PM2.5 dust sensor with self-purifying system comprising sensor body, fan and detection system
System, the gas outlet that the sensor body is equipped with air inlet and is connected to air inlet, between the air inlet and gas outlet
Airflow channel is formed, the fan is installed in airflow channel, and the inside of sensor body is arranged in the detection system, special
Sign is: the laser PM2.5 dust sensor further includes purification system, and the purification system is fixed in sensor body,
The purification system includes purge pipe, purification cavity and filter assemblies, and the purge pipe is equipped with inlet end and outlet
End, the purify cavity body is located in purge pipe, and the filter assemblies are installed in purify cavity body, and by inlet end and outlet
End separates in the two sides of filter assemblies, and the outlet side is connected to sensor body and towards the surface of detection system.
2. a kind of laser PM2.5 dust sensor with self-purifying system as described in claim 1, it is characterised in that: described
Detection system includes laser diode, lens, photodiode and light absorbing element, and the laser diode and lens cooperation connect
The side of airflow channel is connect and is installed in, with matching, the photodiode is installed in airflow channel, and is located at
The side for the detection laser that laser diode generates, light absorbing element are fixed in sensor body and are equipped with loophole and suction
Optical cavity room, extinction chamber are connected to by loophole with airflow channel, and the detection laser that laser diode generates is threaded through
In unthreaded hole.
3. a kind of laser PM2.5 dust sensor with self-purifying system as claimed in claim 2, it is characterised in that: described
Purge pipe is set there are two outlet side: the first outlet side and the second outlet side, the first outlet side and the second outlet side with sensing
Device ontology connection, and the first outlet side is towards the surface of photodiode, the second outlet side is towards the surface of lens.
4. a kind of laser PM2.5 dust sensor with self-purifying system as described in claim 1, it is characterised in that: described
The inlet end of purge pipe is connected to and is located at the air outlet of fan with airflow channel.
5. a kind of laser PM2.5 dust sensor with self-purifying system as described in claim 1, it is characterised in that: described
Filter assemblies include at least one layer of strainer, and the strainer is installed in purify cavity body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811020853.6A CN109187296A (en) | 2018-09-03 | 2018-09-03 | A kind of laser PM2.5 dust sensor with self-purifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811020853.6A CN109187296A (en) | 2018-09-03 | 2018-09-03 | A kind of laser PM2.5 dust sensor with self-purifying system |
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| CN109187296A true CN109187296A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811020853.6A Pending CN109187296A (en) | 2018-09-03 | 2018-09-03 | A kind of laser PM2.5 dust sensor with self-purifying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN113390767A (en) * | 2021-05-28 | 2021-09-14 | 江苏日盈电子股份有限公司 | Dust detection device and dust detection method |
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| CN2562181Y (en) * | 2002-05-08 | 2003-07-23 | 北京宾达绿创科技有限公司 | Laser dust instrument |
| CN2692660Y (en) * | 2004-03-31 | 2005-04-13 | 朱一川 | Laser dust meter |
| CN205120537U (en) * | 2015-11-24 | 2016-03-30 | 上海迪勤传感技术有限公司 | Microparticle thing detects sensor and check out test set |
| CN105865997A (en) * | 2016-06-07 | 2016-08-17 | 中国科学院合肥物质科学研究院 | Atmospheric raise dust concentration measuring device and method based on forward scattering principle |
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| CN206258345U (en) * | 2016-11-08 | 2017-06-16 | 北京汉王蓝天科技有限公司 | There is module and its device for detecting particles in a kind of laser |
| CN207318295U (en) * | 2017-09-26 | 2018-05-04 | 湖北科谱瑞环境资源科技有限公司 | A kind of PM2.5 monitoring devices |
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Patent Citations (9)
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| CN2562181Y (en) * | 2002-05-08 | 2003-07-23 | 北京宾达绿创科技有限公司 | Laser dust instrument |
| CN2692660Y (en) * | 2004-03-31 | 2005-04-13 | 朱一川 | Laser dust meter |
| CN205120537U (en) * | 2015-11-24 | 2016-03-30 | 上海迪勤传感技术有限公司 | Microparticle thing detects sensor and check out test set |
| CN105865997A (en) * | 2016-06-07 | 2016-08-17 | 中国科学院合肥物质科学研究院 | Atmospheric raise dust concentration measuring device and method based on forward scattering principle |
| CN205982006U (en) * | 2016-08-16 | 2017-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
| CN206114476U (en) * | 2016-08-29 | 2017-04-19 | 郭成杰 | Measure sensor of fine particles concentration |
| CN106644862A (en) * | 2016-09-12 | 2017-05-10 | 济南诺方电子技术有限公司 | Sensor, monitoring station based on sensor and monitoring method of monitoring station |
| CN206258345U (en) * | 2016-11-08 | 2017-06-16 | 北京汉王蓝天科技有限公司 | There is module and its device for detecting particles in a kind of laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN113390767A (en) * | 2021-05-28 | 2021-09-14 | 江苏日盈电子股份有限公司 | Dust detection device and dust detection method |
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Application publication date: 20190111 |