CN210071599U - PM2.5 detection device - Google Patents
PM2.5 detection device Download PDFInfo
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- CN210071599U CN210071599U CN201920706785.2U CN201920706785U CN210071599U CN 210071599 U CN210071599 U CN 210071599U CN 201920706785 U CN201920706785 U CN 201920706785U CN 210071599 U CN210071599 U CN 210071599U
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 abstract description 7
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Abstract
A PM2.5 detection device comprises a shell, a Vertical-Cavity Surface-Emitting Laser (VCSEL) and a receiver. The shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively used for inputting and outputting air. The surface emitting laser and the receiver are arranged in the shell, and the surface emitting laser is a multiband laser and can be used for emitting laser with various wavelengths. The outside air can be introduced into the shell through the air inlet, the quantity of particles with different particle sizes is measured in an optical mode, and the mass concentration of the particles is converted into PM 2.5. Therefore, the accuracy of PM2.5 detection can be improved, the overall height can be reduced, the volume can be reduced, and the packaging and transportation cost can be reduced.
Description
Technical Field
The utility model relates to a detection device, in particular to PM2.5 detection device that can make the stability and the accuracy of detection promote.
Background
PM2.5 refers to ultrafine suspended particulate matter (particulate matter with a diameter of 2.5 microns) in the atmosphere, which is also called as pulmonary particles, because they can be suspended in the air or float around with the air flow, are liable to absorb and attach toxic and harmful substances such as heavy metals and microorganisms, have long retention time in the atmosphere and long delivery distance, and thus have great influence on human health and quality of the atmospheric environment.
There are many kinds of PM2.5 detection devices on the market, which can guide particles in the air into a sensing region based on the optical scattering principle, optically measure the number of particles with different particle sizes without particle size screening, and convert the number of particles into PM2.5 mass concentration. However, most of the conventional PM2.5 detection devices have problems of low stability and accuracy.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a not enough PM2.5 detection device that provides to prior art can make the stability and the accuracy that PM2.5 detected promote.
In order to solve the technical problem, the utility model discloses a technical scheme who adopts is, provides a PM2.5 detection device, includes: the air inlet and the air outlet are communicated with the accommodating space and are respectively used for inputting and outputting air; the surface emitting laser is arranged in the accommodating space of the shell, can emit laser and is vertical to one surface to emit, and is a multiband laser which can be used for emitting laser with at least two wavelengths; the receiver is arranged in the accommodating space of the shell; and when air enters the accommodating space of the shell, the surface emitting laser can be used for emitting laser to shoot air particles in the accommodating space, and the laser focuses the light in the receiver to detect PM 2.5.
Preferably, the air inlet and the air outlet are disposed at both sides of the housing.
Preferably, the housing has a first side and a second side, the first side and the second side are located at two opposite sides of the housing, and the air inlet and the air outlet are respectively disposed at the first side and the second side.
Preferably, the surface emitting laser is capable of emitting laser light waves having a wavelength of 400 nm to 1100 nm.
Preferably, the receiver is a photodiode.
In order to solve the technical problem, the utility model discloses a technical scheme is, still provides a PM2.5 detection device, include: the air inlet and the air outlet are communicated with the accommodating space and are respectively used for inputting and outputting air; the surface emitting laser is arranged in the accommodating space of the shell, can emit laser and is vertical to one surface to emit, is a multiband laser and can be used for emitting laser with at least two wavelengths, and can emit laser light waves with wavelengths of 400 nanometers to 1100 nanometers; the receiver is arranged in the accommodating space of the shell; and when air enters the accommodating space of the shell, the laser emitted by the surface emitting laser can be used for shooting air particles in the accommodating space and focusing the light in the receiver so as to detect PM 2.5.
Preferably, the housing has a first side and a second side, the first side and the second side are located at two opposite sides of the housing, and the air inlet and the air outlet are respectively disposed at the first side and the second side.
Preferably, the receiver is a photodiode.
The beneficial effects of the utility model reside in that, the utility model provides a PM2.5 detection device, including casing, face type laser instrument and receiver of penetrating, this face is penetrated the type laser instrument and is a multiband laser instrument, can emit the laser of two kind at least wavelengths, can make the stability and the accuracy that PM2.5 detected promote.
Moreover, the arrangement of the surface emitting laser can reduce the overall height and the volume, thereby reducing the cost of packaging and transportation.
For a further understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for reference and illustration purposes only and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic plan view of a PM2.5 detection device according to a first embodiment of the present invention.
Fig. 2 is a schematic view of a state of use of the PM2.5 detection apparatus according to the first embodiment of the present invention.
Fig. 3 is a schematic plan view of a PM2.5 detection device according to a second embodiment of the present invention.
Fig. 4 is a schematic view of a second embodiment of the present invention showing a usage status of the PM2.5 detection device.
Detailed Description
The embodiments disclosed in the present invention are described below with reference to specific embodiments, and those skilled in the art can understand the advantages and effects of the present invention from the disclosure in the present specification. The present invention may be practiced or carried out in other different embodiments, and various modifications and changes may be made in the details of this description based on the different points of view and applications without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not drawn to scale, but are described in advance. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
First embodiment
Referring to fig. 1, the present invention provides a PM2.5 detecting device, which includes a housing 1, a Vertical-Cavity Surface-Emitting Laser (VCSEL) 2, and a receiver 3.
The housing 1 is a hollow body, and the shape of the housing 1 is not limited and may be changed as needed. The housing 1 has a receiving space 11 formed therein for receiving the surface emitting laser 2 and the receiver 3. The housing 1 has an air inlet 12 and an air outlet 13, and the air inlet 12 and the air outlet 13 penetrate the inside and the outside of the housing 1. The air inlet 12 and the air outlet 13 are communicated with the accommodating space 11, and the air inlet 12 and the air outlet 13 are used for inputting and outputting air, respectively.
The air inlet 12 and the air outlet 13 can be disposed on two sides of the housing 1, in this embodiment, the air inlet 12 and the air outlet 13 are disposed on two opposite sides of the housing 1, that is, the housing 1 has a first side 14 and a second side 15, the first side 14 and the second side 15 are disposed on two opposite sides of the housing 1, and the air inlet 12 and the air outlet 13 are disposed on the first side 14 and the second side 15, respectively. However, the positions where the air inlet 12 and the air outlet 13 are provided are not limited and may be changed as needed.
Preferably, the PM2.5 detecting device of the present invention may further include a fan (not shown), which is used to pump air to flow, so that the air smoothly enters the accommodating space 11 through the air inlet 12 and is discharged from the air outlet 13.
The Surface Emitting Laser 2 is disposed in the accommodating space 11 of the housing 1, and the Surface Emitting Laser 2 is a Vertical-Cavity Surface-Emitting Laser (VCSEL), and Laser light of the VCSEL is emitted perpendicularly to a Surface. The surface emitting laser 2 is a multiband laser that can be used to emit laser light of a plurality of (at least two) wavelengths. In the present embodiment, the surface emitting laser 2 can emit laser light waves with at least two wavelengths, i.e., 650 nm, 660 nm, 675 nm, 730 nm, 750 nm, 780 nm, 830 nm, and 980 nm. Preferably, the surface emitting laser 2 is capable of emitting laser light having a wavelength of 400 nm to 1100 nm.
The receiver 3 is disposed in the accommodating space 11 of the housing 1, and the receiver 3 may be a photodiode (photodiode). The receiver 3 may be configured to receive laser light emitted from the surface emitting laser 2. The positions and angles at which the surface emitting laser 2 and the receiver 3 are arranged are not limited, and may be changed as needed. For example, the optical axes of the surface emitting laser 2 and the receiver 3 may be located on the same straight line or on the same straight line. The embodiment discloses a transmission type PM2.5 detection device, and the optical axes of the surface emitting laser 2 and the receiver 3 are located on the same straight line.
As shown in fig. 2, external air may be introduced into the accommodating space 11 of the case 1 through the air inlet 12 and discharged through the air outlet 13. When air enters the accommodating space 11 of the housing 1, laser emitted by the surface emitting laser 2 can be used for shooting air particles in the accommodating space 11, part of light penetrates through the air particles and is focused in the receiver 3, the number of the particles with different particle diameters is measured in an optical mode, and the light is converted into PM2.5 mass concentration to detect PM 2.5. In the present embodiment, the surface emitting laser 2 can emit laser light waves of three wavelengths, including a laser light a of a first wavelength, a laser light B of a second wavelength, and a laser light C of a third wavelength.
Second embodiment
Referring to fig. 3 and 4, in the embodiment, a reflective PM2.5 detection apparatus is disclosed, and the optical axes of the surface emitting laser 2 and the receiver 3 are located on different straight lines. When air enters the accommodating space 11 of the shell 1, laser emitted by the surface emitting laser 2 can be used for shooting air particles in the accommodating space 11, part of light is reflected and focused in the receiver 3, the number of particles with different particle diameters is measured in an optical mode, and the particles are converted into PM2.5 mass concentration to detect the PM 2.5. In the present embodiment, the surface emitting laser 2 can emit laser light waves of three wavelengths, including a laser light a of a first wavelength, a laser light B of a second wavelength, and a laser light C of a third wavelength.
The beneficial effects of the utility model
The beneficial effects of the utility model reside in that, the utility model discloses a surface-emitting type laser instrument is a multiband laser instrument, can launch the laser of two kind at least wavelengths to average the measuring result, can make stability, the accuracy that PM2.5 detected promote.
Furthermore, the surface emitting laser of the present invention can reduce the overall height and the volume, thereby reducing the cost of packaging and transportation.
However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that all equivalent changes and modifications of the present invention, which are made by the contents of the specification and the drawings, are equally encompassed by the scope of the present invention, and it is well known that the present invention is also applicable.
Claims (8)
1. A PM2.5 detection device, comprising:
the air inlet and the air outlet are communicated with the accommodating space and are respectively used for inputting and outputting air;
the surface emitting laser is arranged in the accommodating space of the shell, can emit laser and is vertical to one surface to emit, and is a multiband laser which can be used for emitting laser with at least two wavelengths;
the receiver is arranged in the accommodating space of the shell; and
when air enters the accommodating space of the shell, the surface emitting laser can be used for emitting laser to shoot air particles in the accommodating space, and the light is focused in the receiver to detect PM 2.5.
2. The apparatus according to claim 1, wherein the air inlet and the air outlet are disposed on two sides of the housing.
3. The apparatus according to claim 2, wherein the housing has a first side and a second side, the first side and the second side are located at two opposite sides of the housing, and the air inlet and the air outlet are respectively disposed at the first side and the second side.
4. The apparatus according to claim 1, wherein the surface emitting laser emits laser light having a wavelength of 400 nm to 1100 nm.
5. The PM2.5 detection device as claimed in claim 1, wherein the receiver is a photodiode.
6. A PM2.5 detection device, comprising:
the air inlet and the air outlet are communicated with the accommodating space and are respectively used for inputting and outputting air;
the surface emitting laser is arranged in the accommodating space of the shell, can emit laser and is vertical to one surface to emit, is a multiband laser and can be used for emitting laser with at least two wavelengths, and can emit laser light waves with wavelengths of 400 nanometers to 1100 nanometers;
the receiver is arranged in the accommodating space of the shell; and
when air enters the accommodating space of the shell, the laser emitted by the surface emitting laser can be used for shooting air particles in the accommodating space and focusing the light in the receiver to detect PM 2.5.
7. The apparatus according to claim 6, wherein the housing has a first side and a second side, the first side and the second side are disposed on opposite sides of the housing, and the air inlet and the air outlet are disposed on the first side and the second side, respectively.
8. The PM2.5 detection device of claim 6, wherein the receiver is a photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920706785.2U CN210071599U (en) | 2019-05-16 | 2019-05-16 | PM2.5 detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920706785.2U CN210071599U (en) | 2019-05-16 | 2019-05-16 | PM2.5 detection device |
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| Publication Number | Publication Date |
|---|---|
| CN210071599U true CN210071599U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920706785.2U Expired - Fee Related CN210071599U (en) | 2019-05-16 | 2019-05-16 | PM2.5 detection device |
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| CN (1) | CN210071599U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112326518A (en) * | 2020-09-19 | 2021-02-05 | 宁波爱立德汽车部件有限公司 | PM2.5 sensor device |
| CN112362546A (en) * | 2020-11-09 | 2021-02-12 | 中国南方电网有限责任公司超高压输电公司柳州局 | High-precision multiband portable particulate matter mass concentration measuring instrument |
-
2019
- 2019-05-16 CN CN201920706785.2U patent/CN210071599U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112326518A (en) * | 2020-09-19 | 2021-02-05 | 宁波爱立德汽车部件有限公司 | PM2.5 sensor device |
| CN112362546A (en) * | 2020-11-09 | 2021-02-12 | 中国南方电网有限责任公司超高压输电公司柳州局 | High-precision multiband portable particulate matter mass concentration measuring instrument |
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Granted publication date: 20200214 |