CN205317625U - Sensor that PM2. 5 used in detection air - Google Patents
Sensor that PM2. 5 used in detection air Download PDFInfo
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- CN205317625U CN205317625U CN201521100800.7U CN201521100800U CN205317625U CN 205317625 U CN205317625 U CN 205317625U CN 201521100800 U CN201521100800 U CN 201521100800U CN 205317625 U CN205317625 U CN 205317625U
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- supporting body
- air
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- laser
- laser apparatus
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 230000008033 biological extinction Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract 2
- 239000000428 dust Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a sensor that PM2.5 used in detection air, the 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, ventilation institution locates supporting body's bottom surface. The utility model discloses a ventilation institution is guaranteeing to improve the measuring precision under the stable circumstances of the amount of wind.
Description
Technical field
The utility model relates to PM2.5 detection field in air, particularly relates to a kind of 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 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 sensor detecting PM2.5 in air, described 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; Air draft mechanism, is located at the bottom surface of described supporting body.
Preferably, described air draft mechanism is side air draft fan, and the air-out direction of side air draft fan and the flow of air going out air port described in described blast inlet flow to are in 90 °.
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 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 air draft mechanism 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 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 side air draft fans
8 metering circuits
9 reflective mirrors
10 sealing-rings
11 fan bases
12 shells
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 sensor detecting PM2.5 in air, and described 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;Air draft mechanism, is located at the bottom surface of supporting body. 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 sensor, two groups of relative sides of supporting body install laser optical path assembly and metering circuit respectively, can guarantee that steady air current is by the accurate detection in more smart ground PM2.5, reduces measuring error like this.
Said exhaust mechanism is side air draft fan 7, and the air-out direction of side air draft fan 7 and the flow of air flowing to out air port by blast inlet are in 90 °. Air draft fan in side is arranged on the bottom surface of above-mentioned supporting body 2 by fan base 11, adopts air draft fan in side to make whole flow of air to formation L-shaped, ensures that flow of air is stable and pass through, it is to increase measuring accuracy.
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 sensor and attractive in appearance.
In sum, the 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 sensor, two groups of relative sides of supporting body install laser optical path assembly and metering circuit respectively, can guarantee like this air-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 sensor of PM2.5 in air, it is characterised in that, described 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;
Air draft mechanism, is located at the bottom surface of described supporting body (2).
2. the sensor of PM2.5 in detection air according to claim 1, it is characterized in that: described air draft mechanism is side air draft fan (7), the air-out direction of side air draft fan (7) and the flow of air going out air port described in described blast inlet flow to are in 90 °.
3. the 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 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 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 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 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 |
|---|---|---|---|
| CN201521100800.7U CN205317625U (en) | 2015-12-25 | 2015-12-25 | Sensor that PM2. 5 used in detection air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100800.7U CN205317625U (en) | 2015-12-25 | 2015-12-25 | Sensor that PM2. 5 used in detection air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205317625U true CN205317625U (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521100800.7U Expired - Fee Related CN205317625U (en) | 2015-12-25 | 2015-12-25 | Sensor that PM2. 5 used in detection air |
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| Country | Link |
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| CN (1) | CN205317625U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932320A (en) * | 2016-10-28 | 2017-07-07 | 杭州克霾环保科技有限公司 | Particulate matter detector |
| CN108398364A (en) * | 2017-01-10 | 2018-08-14 | 现代自动车株式会社 | Dust sensor with flow control function |
| CN109387462A (en) * | 2017-08-02 | 2019-02-26 | 天源华威集团有限公司 | Air detecting sensors |
| CN109596489A (en) * | 2018-11-29 | 2019-04-09 | 海拉（厦门）电气有限公司 | A kind of laser PM2.5 dust sensor of automatic focusing |
-
2015
- 2015-12-25 CN CN201521100800.7U patent/CN205317625U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932320A (en) * | 2016-10-28 | 2017-07-07 | 杭州克霾环保科技有限公司 | Particulate matter detector |
| CN108398364A (en) * | 2017-01-10 | 2018-08-14 | 现代自动车株式会社 | Dust sensor with flow control function |
| CN109387462A (en) * | 2017-08-02 | 2019-02-26 | 天源华威集团有限公司 | Air detecting sensors |
| CN109596489A (en) * | 2018-11-29 | 2019-04-09 | 海拉（厦门）电气有限公司 | A kind of laser PM2.5 dust sensor of automatic focusing |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20181225 |