CN205317624U - Photoelectric sensor that PM2. 5 used in detection air - Google Patents
Photoelectric sensor that PM2. 5 used in detection air Download PDFInfo
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- CN205317624U CN205317624U CN201521100798.3U CN201521100798U CN205317624U CN 205317624 U CN205317624 U CN 205317624U CN 201521100798 U CN201521100798 U CN 201521100798U CN 205317624 U CN205317624 U CN 205317624U
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- supporting body
- air
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- laser
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Abstract
The utility model provides a photoelectric sensor that PM2.5 used in detection air, photoelectric sensor includes: supporting body, supporting body are hollow box structure, and supporting body's top surface and bottom surface are equipped with air intake and air outlet, the laser beam subassembly, including laser instrument, lens and extinction optics spare, laser instrument and extinction optics spare are installed respectively on wherein two opposite flanks of supporting body, lens are located the laser of laser instrument jets out the place ahead of end, two measuring circuits set up respectively on two other opposite flanks of supporting body, and one of them measuring circuit is fixed with the reflector, just the reflector is located in the supporting body, and the coaxial fan that direction and air inlet direction are unanimous of airing exhaust, locate supporting body's bottom surface. The utility model discloses guarantee air mass flow and steadily guarantee measurement accuracy when passing through.
Description
Technical field
The utility model relates to PM2.5 detection field in air, particularly relates to a kind of photo-sensor detecting PM2.5 in air.
Background technology
PM2.5 detection also claims the size and number of dust granules in unit volume in detection air. Current PM2.5 test can adopt laser dust particle counter, laser dust particle counter ultimate principle is that the detection laser of optical sensing device is received by photosensor after dust particle scattering and produces pulse signal, this pulse signal is output and amplifies, then digital signal processing is carried out, by comparing with standard particle signal, by comparing result with different parametric representations out.
Existing laser dust counter is made up of gas path device, optical system and Circuits System etc. usually. Wherein, gas path device comprises air pump and strainer etc., and it is used for gathering gaseous sample to be measured and produces sampling flow (flow is generally between 2.83 liters/min～28.3 liters/min); Optical system, wherein light source is the space carrying out particulate observation for generation of laser, measurement chamber, and collected gaseous sample to be passed from measurement chamber, photodetector is the photoelectric commutator that scattered energy is converted to electrical signal; Circuits System has been exactly the circuit such as the amplification of pulse signals, examination, counting.
But its gas path device is owing to adopting air pump to aspirate, and it easily causes air flow quantity unstable, and existing its measuring accuracy of laser dust counter is lower, can ensure steady air current consequently, it is desirable to a kind of and PM2.5 detecting sensor that accuracy of detection is high.
Practical novel content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of photo-sensor detecting PM2.5 in air, for solving the problem that in prior art, PM2.5 accuracy of detection is not high.
For achieving the above object and other relevant objects, the utility model provides a kind of photo-sensor detecting PM2.5 in air, described photo-sensor comprises: supporting body, and supporting body is the body structure of hollow, and the end face of supporting body and bottom surface are provided with blast inlet and go out air port;Laser optical path assembly, comprises laser apparatus, lens and extinction optical part, and described laser apparatus is arranged on respectively with extinction optical part on wherein two relative sides of described supporting body, and described lens are positioned at the front of the laser ejecting end of described laser apparatus; Two metering circuits, are separately positioned on two other relative side of described supporting body, and one of them metering circuit and reflective mirror are fixed, and described reflective mirror is positioned at described supporting body; And the coaxial fan that air draft direction is consistent with air intake direction, it is located at the bottom surface of described supporting body.
Preferably, described coaxial fan is arranged on by fan permanent seat on the bottom surface of described supporting body, the surface place being positioned at described coaxial fan on described fan permanent seat is provided with air guide structure, and the center of described air guide structure is cone weatherseal, and the surrounding of cone weatherseal is air-guiding hole.
Preferably, described laser apparatus is arranged on described supporting body by laser apparatus permanent seat, the inboardend that described laser apparatus permanent seat comprises fixing described laser apparatus and the cylindrical long cylinder being connected with described inboardend, described lens are arranged on the end of described cylindrical long cylinder.
Preferably, the delustring face of described extinction optical part is coned face, and the front of the inherent described lens of described supporting body is provided with the shading hole filtering laser, and the pore size in described shading hole mates mutually with the refraction angle of described coned face.
Preferably, described reflective mirror is arc-shaped concave mirror.
Preferably, the side described supporting body being installed described metering circuit is provided with sealing-ring.
Preferably, described air inlet is connected with threaded pipe, and the internal diameter of described threaded pipe mates mutually with the exhaust air rate of length with described air draft mechanism.
As mentioned above, the photo-sensor of PM2.5 in detection air of the present utility model, there is following useful effect: air is circulated along the longitudinal direction of supporting body, metering circuit is arranged on two relative sides of supporting body, and coaxial fan is set in the bottom surface of supporting body, ensure steady air current circulation under improve accuracy of detection simultaneously.
Accompanying drawing explanation
Fig. 1 is shown as the photo-sensor schematic diagram of PM2.5 in detection air of the present utility model.
Fig. 2 is shown as laser apparatus permanent seat schematic diagram of the present utility model.
Element numbers explanation
1 threaded pipe
2 supporting bodies
3 laser apparatus
4 extinction optical parts
5 laser apparatus permanent seats
51 inboardends
52 cylindrical long cylinders
6 lens
7 coaxial fans
8 metering circuits
9 reflective mirrors
10 sealing-rings
11 fan permanent seats
111 cone weatherseals
12 shells
13 baffle plates
Embodiment
By particular specific embodiment, enforcement mode of the present utility model being described below, person skilled in the art scholar the content disclosed by this specification sheets can understand other advantages of the present utility model and effect easily.
Refer to Fig. 1 to Fig. 2. Notice, structure that this specification sheets institute accompanying drawings illustrates, ratio, size etc., all only content in order to coordinate specification sheets to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore do not have an essential meaning in technology, the adjustment of the modification of any structure, the change of proportionlity or size, do not affecting under effect that the utility model can produce and the object that can reach, all should still drop in the scope that the technology contents that the utility model discloses can be contained. Simultaneously, this specification sheets is quoted as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and it is not used to limit the enforceable scope of the utility model, the change of its relative relation or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
As shown in Figure 1, the utility model provides a kind of photo-sensor detecting PM2.5 in air, and described photo-sensor comprises: supporting body, and supporting body 2 is the body structure of hollow, and the end face of supporting body 2 and bottom surface are provided with blast inlet and go out air port; Laser optical path assembly, comprises laser apparatus 3, lens 6 and extinction optical part 4, and described laser apparatus 3 is arranged on respectively with extinction optical part 4 on wherein two relative sides of described supporting body 2, and described lens 6 are positioned at the front of the laser ejecting end of described laser apparatus 3; Two metering circuits 8, are separately positioned on two other relative side of described supporting body 2, and one of them metering circuit and reflective mirror 9 are fixed, and described reflective mirror 9 is positioned at described supporting body 2; And the coaxial fan 7 that air draft direction is consistent with air intake direction, it is located at the bottom surface of described supporting body 2. The utility model adopts the installation body of supporting body as each parts of casing shape, the longitudinal direction of supporting body is as the air circulation direction of photo-sensor, two groups of relative sides of supporting body install laser optical path assembly and metering circuit respectively, can guarantee like this air large discharge by time precisely detect PM2.5, reduce measuring error.
Above-mentioned coaxial fan 7 is arranged on the bottom surface of described supporting body 2 by fan permanent seat 11, owing to the center of coaxial fan is motor, air quantity there is stop, therefore on fan permanent seat, carried out leading wind design, the surface place being positioned at coaxial fan 7 in the present embodiment on fan permanent seat 11 is provided with air guide structure, the center of air guide structure is cone weatherseal 111, the surrounding of cone weatherseal 111 is air-guiding hole, utilize air guide structure front to the impact in dead band to eliminate coaxial fan, and avoid dust to fall into dead band and again blown afloat and carry out replicate measurement, improve measuring accuracy.
Baffle plate 13 also it is provided with in the lower section of fan permanent seat 11, baffle plate 13 is utilized to be fixed in fan permanent seat 11 by coaxial fan 7, baffle plate coordinates raising air flow quantity with fan permanent seat, and baffle plate also plays and blocks exterior light to the impact in this sensor, plays interception.
Above-mentioned laser apparatus 3 is arranged on supporting body 2 by laser apparatus permanent seat 5, as shown in Figure 2, the inboardend 51 that laser apparatus permanent seat 5 comprises fixed laser 3 and the cylindrical long cylinder 52 being connected with inboardend 51, lens 6 are arranged on the end of cylindrical long cylinder 52, the internal surface of cylindrical long cylinder has carried out delustring process, as being coated with Flat paint, the use of the cylindrical long cylinder in the present embodiment eliminates the stray light of laser.
The delustring face of the extinction optical part 4 in the present embodiment is coned face, and the front of the inherent lens 6 of supporting body 2 is provided with the shading hole filtering laser, and the pore size in shading hole mates mutually with the refraction angle of coned face. Its absorbing laser forward reflection light of extinction optical part in the present embodiment, and utilize and shading hole is set in supporting body, reach and better absorb reflecting effect.
Reflective mirror in the present embodiment is arc-shaped concave mirror, and the design of reflective mirror is mainly in order to collecting granules reflected light, and amplifies the particle reflected light signal entering metering circuit, it is to increase signal sensitivity.
For improving measuring accuracy, the side that above-mentioned supporting body 2 installs and measures circuit 8 is provided with sealing-ring 10.
Above-mentioned air inlet is connected with threaded pipe 1, and the internal diameter of threaded pipe 1 mates mutually with the exhaust air rate of length with air draft mechanism, and it can ensure that in air, particle smoothly passes measured zone.
For adapting to install above-mentioned each assembly, the structure that each side of above-mentioned supporting body 2 all adapts to each assembly self designs, after in each component assembling to supporting body, it is being made into an outside sheathed shell 12 again of body, it is to increase the firmness of whole photo-sensor and attractive in appearance.
In sum, the photo-sensor of PM2.5 in the utility model detection air, it adopts the supporting body of casing shape as the installation body of each parts, the longitudinal direction of supporting body is as the air circulation direction of photo-sensor, two groups of relative sides of supporting body install laser optical path assembly and metering circuit respectively, can guarantee like this air flow quantity stable by time precisely detect PM2.5, reduce measuring error. So, the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model. Above-described embodiment all not running counter under spirit of the present utility model and category, can be modified or change by any person skilled in the art scholar. Therefore, in art, tool usually intellectual modifies or changes not departing under the spirit and technological thought that the utility model discloses all equivalences completed such as, must be contained by claim of the present utility model.
Claims (7)
1. one kind is detected the photo-sensor of PM2.5 in air, it is characterised in that, described photo-sensor comprises:
Supporting body (2), supporting body is the body structure of hollow, and the end face of supporting body (2) and bottom surface are provided with blast inlet and go out air port;
Laser optical path assembly, comprise laser apparatus (3), lens (6) and extinction optical part (4), described laser apparatus (3) is arranged on wherein two relative sides of described supporting body (2) respectively with extinction optical part (4), and described lens (6) are positioned at the front of the laser ejecting end of described laser apparatus (3);
Two metering circuits (8), it is separately positioned on two other relative side of described supporting body (2), and one of them metering circuit (8) is fixing with reflective mirror (9), and described reflective mirror (9) is positioned at described supporting body;
And the coaxial fan (7) that air draft direction is consistent with air intake direction, it is located at the bottom surface of described supporting body (2).
2. the photo-sensor of PM2.5 in detection air according to claim 1, it is characterized in that: described coaxial fan (7) is arranged on the bottom surface of described supporting body (2) by fan permanent seat (11), the surface place being positioned at described coaxial fan (7) on described fan permanent seat (11) is provided with air guide structure, the center of described air guide structure is cone weatherseal (111), and the surrounding of cone weatherseal (111) is air-guiding hole.
3. the photo-sensor of PM2.5 in detection air according to claim 1, it is characterized in that: described laser apparatus (3) is arranged on described supporting body (2) by laser apparatus permanent seat (5), the inboardend (51) that described laser apparatus permanent seat (5) comprises fixing described laser apparatus (3) and the cylindrical long cylinder (52) being connected with described inboardend, described lens (6) are arranged on the end of described cylindrical long cylinder (52).
4. the photo-sensor of PM2.5 in detection air according to claim 3, it is characterized in that: the delustring face of described extinction optical part (4) is coned face, the front of the inherent described lens (6) of described supporting body (2) is provided with the shading hole filtering laser, and the pore size in described shading hole mates mutually with the refraction angle of described coned face.
5. the photo-sensor of PM2.5 in detection air according to claim 1, it is characterised in that: described reflective mirror (9) is arc-shaped concave mirror.
6. the photo-sensor of PM2.5 in detection air according to claim 1, it is characterised in that: the upper side installing described metering circuit (8) of described supporting body (2) is provided with sealing-ring (10).
7. the photo-sensor of PM2.5 in detection air according to claim 1, it is characterized in that: described air inlet is connected with threaded pipe (1), the internal diameter of described threaded pipe (1) mates mutually with the exhaust air rate of length with described air draft mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100798.3U CN205317624U (en) | 2015-12-25 | 2015-12-25 | Photoelectric sensor that PM2. 5 used in detection air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100798.3U CN205317624U (en) | 2015-12-25 | 2015-12-25 | Photoelectric sensor that PM2. 5 used in detection air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205317624U true CN205317624U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521100798.3U Expired - Fee Related CN205317624U (en) | 2015-12-25 | 2015-12-25 | Photoelectric sensor that PM2. 5 used in detection air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205317624U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106213623A (en) * | 2016-08-25 | 2016-12-14 | 上海泽罗电子科技有限公司 | A kind of cloud mask of band PM2.5 sensor |
| CN107764708A (en) * | 2017-11-24 | 2018-03-06 | 武汉市普瑞思高科技有限公司 | A kind of vehicle-mounted laser PM2.5 sensors |
| CN108169087A (en) * | 2017-12-28 | 2018-06-15 | 江苏久创电气科技有限公司 | Intelligent air detection device and system |
-
2015
- 2015-12-25 CN CN201521100798.3U patent/CN205317624U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106213623A (en) * | 2016-08-25 | 2016-12-14 | 上海泽罗电子科技有限公司 | A kind of cloud mask of band PM2.5 sensor |
| CN106213623B (en) * | 2016-08-25 | 2019-02-12 | 上海泽罗电子科技股份有限公司 | A kind of cloud mask of band PM2.5 sensor |
| CN107764708A (en) * | 2017-11-24 | 2018-03-06 | 武汉市普瑞思高科技有限公司 | A kind of vehicle-mounted laser PM2.5 sensors |
| CN107764708B (en) * | 2017-11-24 | 2024-01-02 | 武汉市普瑞思高科技有限公司 | Vehicle-mounted laser PM2.5 sensor |
| CN108169087A (en) * | 2017-12-28 | 2018-06-15 | 江苏久创电气科技有限公司 | Intelligent air detection device and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20181225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |