CN104677795A - Device for automatically monitoring concentration of PM2.5 in air - Google Patents
Device for automatically monitoring concentration of PM2.5 in air Download PDFInfo
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- CN104677795A CN104677795A CN201510099481.0A CN201510099481A CN104677795A CN 104677795 A CN104677795 A CN 104677795A CN 201510099481 A CN201510099481 A CN 201510099481A CN 104677795 A CN104677795 A CN 104677795A
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Abstract
The invention relates to the technical field of environmental protection, and discloses a device for automatically monitoring concentration of PM2.5 in air. The device comprises a light emission device, an air sampling tank, a light detector and a data monitoring center for monitoring changes of light beams detected by the detector, wherein the light emission device is used for emitting light beams; the air sampling tank comprises a container bottle, an air inlet port and an air exhaust port, an air pump capable of sucking air automatically is arranged at the air inlet port, and an exhaust fan for automatic exhausting, a PM2.5 detection device and a flow sensor are arranged at the air exhaust port; the light detector is arranged in the direction of the light beams passing the air sampling tank, and a Fourier lens is arranged between the light detector and the air sampling tank; the data monitoring center determines the concentration of PM2.5 in air at present through the light detected by the light detector. The technical problems that the concentration of PM2.5 is not monitored well and the detection accuracy is poor in the prior art are solved, and further, the technical effect of accurate monitoring for the concentration of PM2.5 in air can be realized.
Description
Technical field
The present invention relates to environmental technology field, particularly relate to the device of PM2.5 concentration in a kind of automatic monitoring air.
Background technology
Along with the develop rapidly of the high pollutions such as current electric power, oil, automobile, chemical industry, highly energy-consuming trade, the emissions such as increasing carbon dioxide, silicon dioxide, dust are injected in air, cause the sharply decline of air quality, current concern is maximum, what have the greatest impact is exactly the problem of PM2.5, PM2.5 refers to that diameter is less than or equal to the fine particle of 2.5 millimeters, its maximum feature is the alveolar cell that can enter human body, enter blood circulation, huge threat can be caused to health.What within nearest 2 years, have the greatest impact is exactly the problem of the PM2.5 on many ground such as Beijing, once once quick-fried table, huge negative effect is caused to the normal operation of the air quality in capital, traffic, industry-by-industry, each big city, the current whole nation none escape by luck, the threat problem that there is PM2.5 all more or less.
The domestic and international research for PM2.5 at present arises from the starting stage, a lot of concept and methodology is still in the middle of preliminary exploration, the history of every country industrial development is different, understanding for PM2.5 is to the greatest extent identical, enhancing that is healthy along with the common people and environmental consciousness is paid close attention to all the more air quality, PM2.5 topic rapid temperature increases.
Enough attention are not caused to PM2.5 in existing consciousness, meanwhile, also less to the monitoring of PM2.5.
Therefore, prior art exists the monitoring of PM2.5 and imperfection, the precision also inaccurate technical matters of monitoring.
Summary of the invention
The embodiment of the present invention, by providing the device of PM2.5 concentration in a kind of automatic monitoring air, solves in prior art and to exist PM2.5 concentration monitor and incomplete, the technical matters that accuracy of detection is inaccurate.
The technical scheme of the embodiment of the present invention is specially:
In automatic monitoring air, a device for PM2.5 concentration, comprising: light emitting devices, air sampling pond, photo-detector, and detects the data monitor center of light beam change to detector;
Wherein, light emitting devices is used for Emission Lasers bundle;
Air sampling pond comprises: container bottle, air intake opening, exhausr port, the air pump of automatic air-breathing is provided with at air intake opening, at exhausr port, self-bleeding exhaust fan is set, and being arranged on the pick-up unit of PM2.5 and the flow sensor of internal tank, the pick-up unit of PM2.5 connects exhaust fan, and flow sensor connects air pump; Described air sampling pond is arranged at the transmitting terminal of light emitting devices;
Photo-detector is arranged on the beam direction via the outgoing of air sampling pond, between photo-detector and air sampling pond, arrange fourier lense;
Data monitor center changes electric signal into the light signal detected by photo-detector, according to the relation that PM2.5 particulate matter light intensity is directly proportional to concentration, determines PM2.5 concentration in present air.
Further, described light emitting devices is specially generating laser.
Further, also comprise: be arranged at the lens between light emitting devices and air sampling pond, for focusing on the light beam launched by light emitting devices, filtering, beam-expanding collimation.
Further, the air pump in described air sampling pond and flow sensor are all electrically connected to data monitor center; Vent fan and PM2.5 pick-up unit are all electrically connected to data monitor center.
The one or more technical schemes provided in the embodiment of the present invention, at least have following technique effect or advantage:
1, owing to being provided with light emitting devices in the device of automatically monitoring PM2.5 concentration in air, air sampling pond, photo-detector and to detector detect light beam change data monitor center, wherein, by light emitting devices transmitted beam, air sampling pond gathers automatically to air, automatic-discharging after detection, the light beam being transmitted through air sampling pond is detected by photo-detector, and transfer to data monitor center, this data monitor center changes electric signal into the light signal that photo-detector detects, according to the relation that PM2.5 particulate matter light intensity is directly proportional to concentration, determine the concentration of PM2.5 in present air, thus the PM2.5 concentration value in present air accurately detected, solve in prior art and to exist PM2.5 concentration monitor and incomplete, the technical matters that accuracy of detection is inaccurate, and then achieve the technique effect of the precise monitoring to PM2.5 in air.
2, owing to adopting, lens are set between light emitting devices and air sampling pond, the light beam that these lens are used for launching light emitting devices focuses on, filtering, beam-expanding collimation, make the light beam exposing to air sampling pond desirable, thus make the concentration of PM2.5 in the air recorded comparatively accurate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of automatically monitoring PM2.5 concentration in air in the embodiment of the present invention.
Embodiment
The embodiment of the present invention is by providing the device of PM2.5 concentration in a kind of automatic monitoring air, solve in prior art and to exist PM2.5 concentration monitor and incomplete, the technical matters that accuracy of detection is inaccurate, and then achieve and can carry out the technique effect of accurate measurements to PM2.5 concentration in air.
Existing PM2.5 Concentration Testing and imperfection to solve in above-mentioned prior art, the technical matters that accuracy of detection is inaccurate, below in conjunction with Figure of description and concrete embodiment, technique scheme being described in detail.
The embodiment of the present invention provides the device of PM2.5 concentration in a kind of automatic monitoring air, as shown in Figure 1, comprising: light emitting devices 101, air sampling pond 102, photo-detector 103, and light beam is detected to photo-detector 103 change the data monitor center 104 of monitoring.Wherein, light emitting devices 101 is for transmitted beam, air sampling pond 102 comprises: container bottle 1021, air intake opening 1022, exhausr port 1023, air intake opening 1022 and exhausr port 1023 are arranged on container bottle 1021 not by the place that light beam irradiation arrives, and such as, air intake opening 1022 and exhausr port 1023 can be arranged on container bottle 1021 top or bottom.Or air intake opening 1022 is arranged on container bottle 1021 top, and exhausr port 1023 is arranged on bottom container bottle 1021.Be provided with the air pump 1024 of automatic air-breathing at air intake opening 1022, exhausr port 1023 is provided with self-bleeding exhaust fan 1025, air pump 1024 is for automatically gathering air sample, and vent fan 1025 is for discharging the air sample in this air sampling pond.Concrete, the pick-up unit 1027 of flow sensor 1026 and PM2.5 is also provided with in this inside, air sampling pond 102, this flow sensor 1026 is connected with air pump 1024, the pick-up unit 1027 of this PM2.5 is connected with exhaust fan 1025, like this, air pump 1024 open automatically gather air time, when flow sensor 1026 monitor the gas passed through be greater than the volume in this air sampling pond 102 time, by connecting the data monitor center 104 of this flow sensor 1026, controlling this air pump and closing.Therefore, this data monitor center 104 also connects air pump; In like manner, the pick-up unit 1027 of exhaust fan 1025 and PM2.5 is also connected to data monitor center 104, and exhaust fan 1025 connects the pick-up unit of this PM2.5.When after the Concentration Testing of this PM2.5 is complete, need that this is collected the PM2.5 gathered to discharge, be convenient to gather and detect next time, therefore, can control to open vent fan 1025 by data monitor center 104, and detected by the pick-up unit being arranged on the PM2.5 in air sampling pond 102, detect also there is the particle of PM2.5 in this air sampling pond 102 time, controlled to continue to open exhaust fan 1025 by data monitor center 104, when detecting that the particle of PM2.5 in this air sampling pond 102 is got rid of clean, controlled to close vent fan 1025 by data monitor center 104.
Above-mentioned is that 102 pairs, air sampling pond air gathers and the process of automatic-discharging automatically.The light beam launched by light emitting devices 101 is through lens 105 directive air sampling pond 102 again, wherein, lens 105 are arranged between light emitting devices 101 and air sampling pond 102, for focusing on the light beam launched by light emitting devices 101, filtering, beam-expanding collimation, thus make the light beam in directive air sampling pond 102 desirable, be convenient to detect.Concrete, this light emitting devices 101 specifically generating laser, when this laser beam is through air sampling pond 102, because light beam irradiation is on the particle of the suspension in this air sampling pond 102, produce scattered light, under the condition that particle character is certain, the scattered light intensity of particle is directly proportional to mass concentration, measure scattered light intensity, application conversion coefficient, tries to achieve particle mass concentration, specifically, because light beam by particulate matter is, the particle equal or larger with using optical wavelength to the order of magnitude, light scattering is the main formation of optical energy attenuation.
Therefore, light beam is detected by photo-detector 103 through air sampling pond 102, and transfer to data monitor center, fourier lense 106 is set between air sampling pond 102 and photo-detector 103, the scattered beam of air sampling pond 102 outgoing can be assembled by this fourier lense 106, be convenient to this photodetector 103 pairs of light beams detect, finally, this data monitor center 104 is transformed into electric signal to the light signal detected by photo-detector 103, according to the relation that PM2.5 particulate matter light is slightly directly proportional to concentration, determine the concentration of PM2.5 in present air.
Can be more accurate by the concentration of the above-mentioned whole PM2.5 recorded.When detecting that the concentration of PM2.5 is higher, should reduce vehicle exhaust, the behaviors such as firecracker of as far as possible setting off fireworks less, for the environmental protection cause of country contributes.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (4)
1. the automatic device of PM2.5 concentration in monitoring air, is characterized in that, comprising: light emitting devices, air sampling pond, photo-detector, and detects light beam to detector and change the data monitor center of monitoring;
Wherein, light emitting devices is used for transmitted beam;
Air sampling pond comprises: container bottle, air intake opening, exhausr port, the air pump of automatic air-breathing is provided with at air intake opening, at exhausr port, self-bleeding exhaust fan is set, and being arranged on the pick-up unit of PM2.5 and the flow sensor of internal tank, the pick-up unit of PM2.5 connects exhaust fan, and flow sensor connects air pump; Described air sampling pond is arranged at the transmitting terminal of light emitting devices;
Photo-detector is arranged on the beam direction via the outgoing of air sampling pond, between photo-detector and air sampling pond, arrange fourier lense;
Data monitor center changes electric signal into the light signal detected by photo-detector, according to the relation that PM2.5 particulate matter light intensity is directly proportional to concentration, determines PM2.5 concentration in present air.
2. the device of PM2.5 concentration in automatic monitoring air according to claim 1, it is characterized in that, described light emitting devices is specially generating laser.
3. the device of PM2.5 concentration in automatic monitoring air according to claim 1 and 2, it is characterized in that, also comprise: be arranged at the lens between light emitting devices and air sampling pond, for focusing on the light beam launched by light-emitting device, filtering, beam-expanding collimation.
4. the device of PM2.5 concentration in automatic monitoring air according to claim 1, it is characterized in that, the air pump in described air sampling pond and flow sensor are all electrically connected to data monitor center; Vent fan and PM2.5 pick-up unit are all electrically connected to data monitor center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510099481.0A CN104677795A (en) | 2015-03-06 | 2015-03-06 | Device for automatically monitoring concentration of PM2.5 in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510099481.0A CN104677795A (en) | 2015-03-06 | 2015-03-06 | Device for automatically monitoring concentration of PM2.5 in air |
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| CN104677795A true CN104677795A (en) | 2015-06-03 |
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| CN201510099481.0A Pending CN104677795A (en) | 2015-03-06 | 2015-03-06 | Device for automatically monitoring concentration of PM2.5 in air |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169082A (en) * | 2016-12-07 | 2018-06-15 | 董青云 | The laser particle analyzer that a kind of positive and negative Fourier's light path combines |
| CN109975186A (en) * | 2019-04-18 | 2019-07-05 | 无锡豪帮高科股份有限公司 | A kind of PM2.5 laser sensor |
-
2015
- 2015-03-06 CN CN201510099481.0A patent/CN104677795A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169082A (en) * | 2016-12-07 | 2018-06-15 | 董青云 | The laser particle analyzer that a kind of positive and negative Fourier's light path combines |
| CN109975186A (en) * | 2019-04-18 | 2019-07-05 | 无锡豪帮高科股份有限公司 | A kind of PM2.5 laser sensor |
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Application publication date: 20150603 |