CN206862836U - A kind of PM2.5 sensors - Google Patents
A kind of PM2.5 sensors Download PDFInfo
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- CN206862836U CN206862836U CN201720574144.7U CN201720574144U CN206862836U CN 206862836 U CN206862836 U CN 206862836U CN 201720574144 U CN201720574144 U CN 201720574144U CN 206862836 U CN206862836 U CN 206862836U
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- photoelectric sensor
- light emitter
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- tested gas
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Abstract
The utility model discloses a kind of PM2.5 sensors, lasing light emitter, concentration piece and photoelectric sensor are included；The lasing light emitter can produce laser；Laser caused by the collectable lasing light emitter of the concentration piece, 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 exports after amplified circuit amplifies again, obtains the pulse signal comprising airborne and particle diameter；The pulse signal is handled through data processing unit, and the PM2.5 of tested gas concentration is calculated.PM2.5 sensors cost described in the utility model is low, measurement accuracy is high.
Description
Technical field
It the utility model is related 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
The concentration of particulate in air is monitored.The method of current domestic external pelivimetry particle concentration is of all kinds, 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 fast development of sensor industry, the advantages of carrying out measurement of concetration using light scattering method in non-sampling method, have increasingly highlighted.
Concentration is monitored according to light scattering principle in non-sampling method, i.e. the illumination of some strength be mapped in particulate in air with
Afterwards, it can pass through to scattering light, scattering light light intensity and particle concentration proportion relation is scattered around it and collect scattering
Light, measurement scattering illumination are mapped to the size of caused electric signal on photoelectric sensor to weigh dust concentration.The utility model is just
It is to be developed according to this principle.Other existing PM2.5 detectors cost is very high, is difficult to realize in family to PM2.5
Detection, therefore there is an urgent need to a kind of low cost, the high PM2.5 sensors of measurement accuracy.
The content of the invention
The purpose of the utility model be for overcome the deficiencies in the prior art and provide it is a kind of low cost, measurement accuracy it is high
PM2.5 sensors.
To reach above-mentioned purpose, the technical solution adopted in the utility model is：A kind of PM2.5 sensors are provided, comprising sharp
Light source, concentration piece, measurement chamber, light trapping, photoelectric sensor and data processing unit；The lasing light emitter can produce monochromatic, stably
Spend high laser；Laser beam caused by the collectable lasing light emitter of the concentration piece, then projects it onto measurement intracavitary, forms light
Sensitizing range；The measurement chamber is externally provided with fan, and during the fan work, tested gas can be sucked to measurement intracavitary；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；Reflective mirror is provided between the measurement chamber and photoelectric sensor, the reflective mirror collects what is scattered out
Laser is simultaneously projected on photoelectric sensor；The laser projection scattered out is converted to electric signal to after on photoelectric sensor；
The electric signal exports after amplified circuit amplifies again, obtains the pulse signal comprising airborne and particle diameter；The pulse
Signal is handled through data processing unit, and the PM2.5 of tested gas concentration is calculated.
Preferably, the light trapping be arranged in parallel with laser beam caused by lasing light emitter.
Preferably, the reflective mirror is placed with the angle in 90 ° of laser beam caused by lasing light emitter.
Preferably, 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 utility model has following advantages compared with prior art：
Tested air-flow is sucked measurement intracavitary by PM2.5 sensors described in the utility model by the work of fan so that gas
Stream carries out quick forced convertion, had not only reduced cost but also had realized high-precision measurement, while can accurately measure tested gas
PM2.5 concentration；The utility model is additionally provided with communication interface simultaneously, can be by tested gas by the communication interface
PM2.5 concentration data reports user.
Brief description of the drawings
Technical solutions of the utility model are described further below in conjunction with the accompanying drawings：
Fig. 1 is the fundamental diagram of PM2.5 sensors described in the utility model;
Wherein：1st, lasing light emitter；2nd, concentration piece；3rd, chamber is measured；4th, light trapping；5th, fan；6 reflective mirrors；7th, photoelectric sensor；
8th, amplifying circuit；9th, data processing unit；10th, communication interface.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail.
Accompanying drawing 1 is PM2.5 sensors described in the utility model, includes lasing light emitter 1, concentration piece 2, measurement chamber 3, light trapping
4th, fan 5, reflective mirror 6, photoelectric sensor 7, amplifying circuit 8, data processing unit 9 and communication interface 10；The energy of lasing light emitter 1
Produce laser monochromatic, that stability is high；The concentration piece 2 collect lasing light emitter 1 caused by laser beam, then project it onto
Measure in chamber 3, form light sensitive area；The measurement chamber 3 is externally provided with fan 5, when the fan 5 works, can inhale tested gas
Enter to measure in chamber 3, tested gas is carried out quick forced convertion, not only reduced cost but also realized high-precision measurement；Work as quilt
When surveying gas by light sensitive area, laser can be irradiated on air particle, and to scattering a part of laser around it, remaining
Laser absorbed by light trapping 4；The light trapping 4 be arranged in parallel with laser beam caused by lasing light emitter 1；The measurement He of chamber 3
Reflective mirror 6 is provided between photoelectric sensor 7, the reflective mirror 6 is placed with the angle in 90 ° of laser beam caused by lasing light emitter 1；It is described
Reflective mirror 6 collects the laser scattered out and projected on photoelectric sensor 7；The laser projection scattered out is to photoelectricity
Electric signal is converted to after on sensor 7；The electric signal exports after amplified circuit 8 amplifies again, obtains including airborne
With the pulse signal of particle diameter；The pulse signal is handled through data processing unit 9, be calculated tested gas PM2.5 it is dense
Degree；The data processing unit 9 is connected with communication interface 10, can be by the PM2.5's of tested gas by the communication interface 10
Concentration data reports user.
Tested air-flow is sucked measurement intracavitary by PM2.5 sensors described in the utility model by the work of fan so that gas
Stream carries out quick forced convertion, had not only reduced cost but also had realized high-precision measurement, while can accurately measure tested gas
PM2.5 concentration；The utility model is additionally provided with communication interface 10 simultaneously, can be by tested gas by the communication interface 10
PM2.5 concentration data report user.
It the above is only concrete application example of the present utility model, do not form any limit to the scope of protection of the utility model
System.All technical schemes formed using equivalent transformation or equivalent replacement, all fall within the utility model rights protection scope it
It is interior.
Claims (4)
- A kind of 1. 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 laser monochromatic, that stability is high；The concentration piece is collected caused by lasing light emitter Laser beam, measurement intracavitary is then projected it onto, form light sensitive area；The measurement chamber is externally provided with fan, the fan work When making, tested gas can be sucked to measurement intracavitary；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 exports after amplified circuit amplifies again, is wrapped Pulse signal containing airborne and particle diameter；The pulse signal is handled through data processing unit, and tested gas is calculated PM2.5 concentration.
- 2. PM2.5 sensors according to claim 1, it is characterised in that：The light trapping and laser caused by lasing light emitter Light beam be arranged in parallel.
- 3. PM2.5 sensors according to claim 1, it is characterised in that：The reflective mirror and laser caused by 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 |
|---|---|---|---|
| CN201720574144.7U CN206862836U (en) | 2017-05-22 | 2017-05-22 | A kind of PM2.5 sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720574144.7U CN206862836U (en) | 2017-05-22 | 2017-05-22 | A kind of PM2.5 sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206862836U true CN206862836U (en) | 2018-01-09 |
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ID=60824847
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720574144.7U Active CN206862836U (en) | 2017-05-22 | 2017-05-22 | A kind of PM2.5 sensors |
Country Status (1)
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| CN (1) | CN206862836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024419A (en) * | 2017-05-22 | 2017-08-08 | 苏州宏瑞净化科技有限公司 | A kind of PM2.5 sensors |
| CN108362616A (en) * | 2018-02-08 | 2018-08-03 | 芜湖美智空调设备有限公司 | Dust sensor and its calibration method, airhandling equipment |
-
2017
- 2017-05-22 CN CN201720574144.7U patent/CN206862836U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024419A (en) * | 2017-05-22 | 2017-08-08 | 苏州宏瑞净化科技有限公司 | A kind of PM2.5 sensors |
| CN108362616A (en) * | 2018-02-08 | 2018-08-03 | 芜湖美智空调设备有限公司 | Dust sensor and its calibration method, airhandling equipment |
| CN108362616B (en) * | 2018-02-08 | 2020-12-22 | 芜湖美智空调设备有限公司 | Dust sensor, calibration method thereof and air treatment equipment |
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