CN107024419A - A kind of PM2.5 sensors - Google Patents
A kind of PM2.5 sensors Download PDFInfo
- Publication number
- CN107024419A CN107024419A CN201710363868.1A CN201710363868A CN107024419A CN 107024419 A CN107024419 A CN 107024419A CN 201710363868 A CN201710363868 A CN 201710363868A CN 107024419 A CN107024419 A CN 107024419A
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- China
- Prior art keywords
- laser
- photoelectric sensor
- light emitter
- sensors
- tested gas
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- 238000005259 measurement Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000005622 photoelectricity 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
Abstract
The invention discloses a kind of PM2.5 sensors, lasing light emitter, concentration piece and photoelectric sensor are included；The lasing light emitter can produce laser；The concentration piece collects the laser that lasing light emitter is produced, and then projects it onto measurement intracavitary, forms light sensitive area；The measurement chamber is externally provided with fan；When tested gas is by light sensitive area, laser can be irradiated on air particle, and to a part of laser is scattered around it, remaining laser is absorbed by light trapping；Reflective mirror is provided between the measurement chamber and photoelectric sensor, the reflective mirror collects the laser scattered out and projected on photoelectric sensor；The laser projection scattered out is converted to electric signal to after on photoelectric sensor；The electric signal is exported after amplified circuit amplifies again, obtains the pulse signal comprising airborne and particle diameter；The pulse signal is handled through data processing unit, calculates the PM2.5 of tested gas concentration.PM2.5 sensors cost of the present invention is low, measurement accuracy is high.
Description
Technical field
The present invention relates to PM2.5 sensors, the high PM2.5 sensors of especially a kind of low cost, measurement accuracy.
Background technology
With the quickening of China's process of industrialization, the discharge capacity of particulate in air also gradually increases, due in air
The problem of environmental pollution that Particulate Pollution is brought also becomes increasingly severe.In order to realize quantitative description air quality, it is necessary to
Concentration to particulate in air is monitored.The method of country's external pelivimetry particle concentration is of all kinds at present, from particulate matter
It is divided into two major classes on concentration sensing modality:Sampling method and non-sampling method.With the development of science and technology particularly in optical technology and biography
The advantage for carrying out measurement of concetration using light scattering method in the fast development of sensor industry, non-sampling method has increasingly been highlighted.
In non-sampling method according to light scattering principle monitor concentration, i.e. some strength illumination be mapped in particulate in air with
Afterwards, understand and scattered light is scattered to around it, scattered light light intensity and particle concentration proportion relation pass through and collect scattering
Light, measurement scattered light is irradiated to the size of the electric signal produced on photoelectric sensor to weigh dust concentration.The present invention is exactly root
Developed according to this principle.Other existing PM2.5 detectors cost is very high, is difficult to realize the inspection to PM2.5 in family
Survey, therefore in the urgent need to the high PM2.5 sensors of a kind of low cost, measurement accuracy.
The content of the invention
There is provided a kind of low cost, measurement accuracy high PM2.5 the invention aims to overcome the deficiencies in the prior art
Sensor.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of PM2.5 sensors are provided, comprising lasing light emitter,
Concentration piece, measurement chamber, light trapping, photoelectric sensor and data processing unit；It is high that the lasing light emitter can produce monochromatic, stability
Laser；The concentration piece collects the laser beam that lasing light emitter is produced, and then projects it onto measurement intracavitary, forms photaesthesia
Area；The measurement chamber is externally provided with fan, during the fan work, can be by tested gas suction measurement intracavitary；When tested gas warp
When crossing light sensitive area, laser can be irradiated on air particle, and to scattering a part of laser around it, remaining laser quilt
Light trapping absorbs；Reflective mirror is provided between the measurement chamber and photoelectric sensor, the reflective mirror collects the laser scattered out
And project on photoelectric sensor；The laser projection scattered out is converted to electric signal to after on photoelectric sensor；It is described
Electric signal is exported after amplified circuit amplifies again, obtains the pulse signal comprising airborne and particle diameter；The pulse signal
Handled through data processing unit, calculate the PM2.5 of tested gas concentration.
It is preferred that, the laser beam that the light trapping is produced with lasing light emitter be arranged in parallel.
It is preferred that, the reflective mirror is placed with the laser beam that lasing light emitter is produced angle in 90 °.
It is preferred that, the PM2.5 sensors, also comprising communication interface；The data processing unit is connected with communication interface,
The PM2.5 of tested gas concentration data can be reported by user by the communication interface.
Due to the utilization of above-mentioned technical proposal, the present invention has following advantages compared with prior art：
Tested air-flow suction is measured intracavitary by PM2.5 sensors of the present invention by the work of fan so that air-flow carries out fast
Fast forced convertion, had not only reduced cost but also had realized high-precision measurement, while the PM2.5 of tested gas can accurately be measured
Concentration；The present invention is additionally provided with communication interface simultaneously, can be by the PM2.5 of tested gas concentration data by the communication interface
Report user.
Brief description of the drawings
Technical solution of the present invention is described further below in conjunction with the accompanying drawings：
Accompanying drawing 1 is the fundamental diagram of PM2.5 sensors of the present invention;
Wherein：1st, lasing light emitter；2nd, concentration piece；3rd, chamber is measured；4th, light trapping；5th, fan；6 reflective mirrors；7th, photoelectric sensor；8th, put
Big circuit；9th, data processing unit；10th, communication interface.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Accompanying drawing 1 is PM2.5 sensors of the present invention, includes lasing light emitter 1, concentration piece 2, measurement chamber 3, light trapping 4, wind
Fan 5, reflective mirror 6, photoelectric sensor 7, amplifying circuit 8, data processing unit 9 and communication interface 10；The lasing light emitter 1 can be produced
The high laser of monochromatic, stability；The concentration piece 2 collects the laser beam of the generation of lasing light emitter 1, then projects it onto measurement
In chamber 3, light sensitive area is formed；The measurement chamber 3 is externally provided with fan 5, when the fan 5 works, and can suck tested gas and survey
Measure in chamber 3, tested gas is carried out quick forced convertion, not only reduced cost but also realized high-precision measurement；When tested gas
When body is by light sensitive area, laser can be irradiated on air particle, and to a part of laser is scattered around it, remaining swashs
Light is absorbed by light trapping 4；The laser beam that the light trapping 4 is produced with lasing light emitter 1 be arranged in parallel；The measurement chamber 3 and photoelectricity
Reflective mirror 6 is provided between sensor 7, the reflective mirror 6 is placed with the laser beam that lasing light emitter 1 is produced angle in 90 °；It is described reflective
Mirror 6 collects the laser scattered out and projected on photoelectric sensor 7；The laser projection scattered out is to photoelectric sensing
Electric signal is converted to after on device 7；The electric signal is exported after amplified circuit 8 amplifies again, obtains including airborne and grain
The pulse signal in footpath；The pulse signal is handled through data processing unit 9, calculates the PM2.5 of tested gas concentration；Institute
Data processing unit 9 is stated to be connected with communication interface 10, can be by the PM2.5 of tested gas concentration numbers by the communication interface 10
According to reporting user.
Tested air-flow suction is measured intracavitary by PM2.5 sensors of the present invention by the work of fan so that air-flow enters
The quick forced convertion of row, had not only reduced cost but also had realized high-precision measurement, while tested gas can accurately be measured
PM2.5 concentration；The present invention is additionally provided with communication interface 10 simultaneously, can be by tested gas by the communication interface 10
PM2.5 concentration data reports user.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and be carried out, and it is not intended to limit the scope of the present invention, all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all cover within the scope of the present invention.
Claims (4)
1. a kind of PM2.5 sensors, it is characterised in that：Comprising lasing light emitter, concentration piece, measurement chamber, light trapping, photoelectric sensor and
Data processing unit；The lasing light emitter can produce the high laser of monochromatic, stability；The concentration piece collects what lasing light emitter was produced
Laser beam, then projects it onto measurement intracavitary, forms light sensitive area；The measurement chamber is externally provided with fan, the fan work
, can be by tested gas suction measurement intracavitary when making；When tested gas is by light sensitive area, laser can be irradiated to air particle
On, and to a part of laser is scattered around it, remaining laser is absorbed by light trapping；Between the measurement chamber and photoelectric sensor
Provided with reflective mirror, the reflective mirror collects the laser scattered out and projected on photoelectric sensor；It is described to scatter out
Laser projection is converted to electric signal to after on photoelectric sensor；The electric signal is exported after amplified circuit amplifies again, is wrapped
Pulse signal containing airborne and particle diameter；The pulse signal is handled through data processing unit, calculates tested gas
PM2.5 concentration.
2. PM2.5 sensors according to claim 1, it is characterised in that：The laser that the light trapping is produced with lasing light emitter
Light beam be arranged in parallel.
3. PM2.5 sensors according to claim 1, it is characterised in that：The laser that the reflective mirror is produced with lasing light emitter
Light beam angle in 90 ° is placed.
4. PM2.5 sensors according to claim 1, it is characterised in that：The PM2.5 sensors, also connect comprising communication
Mouthful；The data processing unit is connected with communication interface, can be by the PM2.5 of tested gas concentration numbers by the communication interface
According to reporting user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710363868.1A CN107024419A (en) | 2017-05-22 | 2017-05-22 | A kind of PM2.5 sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710363868.1A CN107024419A (en) | 2017-05-22 | 2017-05-22 | A kind of PM2.5 sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107024419A true CN107024419A (en) | 2017-08-08 |
Family
ID=59528355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710363868.1A Pending CN107024419A (en) | 2017-05-22 | 2017-05-22 | A kind of PM2.5 sensors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107024419A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324094A (en) * | 2021-12-30 | 2022-04-12 | 北京智米科技有限公司 | Laser particulate matter sensing device and method for measuring particulate matter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266948A (en) * | 2014-10-20 | 2015-01-07 | 崔海林 | Particulate matter sensor and particulate matter monitoring method |
| CN205958420U (en) * | 2016-08-04 | 2017-02-15 | 安徽蓝盾光电子股份有限公司 | Light scattering particulate matter concentration detection device |
| CN206114476U (en) * | 2016-08-29 | 2017-04-19 | 郭成杰 | Measure sensor of fine particles concentration |
| CN206862836U (en) * | 2017-05-22 | 2018-01-09 | 苏州宏瑞净化科技有限公司 | A kind of PM2.5 sensors |
-
2017
- 2017-05-22 CN CN201710363868.1A patent/CN107024419A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266948A (en) * | 2014-10-20 | 2015-01-07 | 崔海林 | Particulate matter sensor and particulate matter monitoring method |
| CN205958420U (en) * | 2016-08-04 | 2017-02-15 | 安徽蓝盾光电子股份有限公司 | Light scattering particulate matter concentration detection device |
| CN206114476U (en) * | 2016-08-29 | 2017-04-19 | 郭成杰 | Measure sensor of fine particles concentration |
| CN206862836U (en) * | 2017-05-22 | 2018-01-09 | 苏州宏瑞净化科技有限公司 | A kind of PM2.5 sensors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324094A (en) * | 2021-12-30 | 2022-04-12 | 北京智米科技有限公司 | Laser particulate matter sensing device and method for measuring particulate matter |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170808 |