CN106053311B - A kind of dust sensor - Google Patents
A kind of dust sensor Download PDFInfo
- Publication number
- CN106053311B CN106053311B CN201610674439.1A CN201610674439A CN106053311B CN 106053311 B CN106053311 B CN 106053311B CN 201610674439 A CN201610674439 A CN 201610674439A CN 106053311 B CN106053311 B CN 106053311B
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- light
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- emitting tube
- dust sensor
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- 239000000428 dust Substances 0.000 title claims abstract description 90
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000009738 saturating Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G01N15/075—
Abstract
The present invention relates to dust detection fields, disclose a kind of dust detection sensor, and the dust sensor includes: air duct, and the air stream of dust content to be measured circulates in air duct；Light emission component, comprising: light-emitting tube irradiates the air stream to circulate in the air duct and lens subassembly for emitting light, in the optical path of the light, for converging the light of the light-emitting tube transmitting；Photosensitive element is located in the air duct, for receiving the scattering light generated after the light irradiation dust；And processing element, dust content is determined based on the scattering light, wherein the detecting distance for the lens for converging the light in the photosensitive element and the lens subassembly makes the resolution ratio highest of the dust sensor.So by considering influence of the detecting distance between photosensitive element and the lens of converged light to the resolution ratio of dust sensor, the resolution ratio of dust sensor is improved by the way that the detecting distance is arranged.
Description
Technical field
The present invention relates to dust detection fields, and in particular, to a kind of dust detection sensor.
Background technique
Dust sensor be using MIE scattering theory to suspended particulate in air carry out count or mass concentration measure
Mode.In general, dust sensor has an air duct, a light-emitting tube, lens and a photosensitive element.Air stream is in air duct
Middle flowing is generated scattering light by laser irradiation when air stream flows through above photosensitive element, and photosensitive element receives scattering light, leads to
Spend the case where dust in air stream is obtained to the analysis of scattering light.
In the prior art, the photosensitive element of dust sensor is located at the lower section of test point, and the position of test point is usual
Gas is set to flow freely over above test point, however in the prior art, the determination of test point, i.e. photosensitive element and converged light
The setting of detecting distance between lens is often unable to reach the highest resolution of dust sensor.
Summary of the invention
The object of the present invention is to provide a kind of dust sensor, which considers photosensitive element and converged light
The influence of detecting distance between lens to the resolution ratio of dust sensor, improves dust by the way that the detecting distance is arranged
The resolution ratio of sensor.
To achieve the goals above, the present invention provides a kind of dust sensor, and the dust sensor includes: air duct, to
The air stream for surveying dust content circulates in air duct；Light emission component, comprising: light-emitting tube irradiates described for emitting light
The air stream and lens subassembly to circulate in air duct, in the optical path of the light, for converging the light-emitting tube transmitting
Light；Photosensitive element is located in the air duct, for receiving the scattering light generated after the light irradiation dust；And processing element,
Dust content is determined based on the scattering light, wherein the lens of the light are converged in the photosensitive element and the lens subassembly
Detecting distance make the resolution ratio highest of the dust sensor.
Preferably, the lens subassembly includes a lens.
Preferably, in the range of the power of the light-emitting tube is located at 2.2mw to 2.8mw and the diameter of the lens is
In the case where 6mm, the detecting distance is 12mm；And it is located at the range of 3.2mw to 3.8mw in the power of the light-emitting tube
In the case that the diameter of the interior and described lens is 6mm, the detecting distance is 15mm.
Preferably, the lens subassembly includes: the first lens, for converging the light of the light-emitting tube transmitting；Second thoroughly
Mirror, between the light-emitting tube and first lens, for so that the light and described first that the light-emitting tube emits
The optical axis of lens is parallel.
Preferably, in the case where in the range of the power of the light-emitting tube is located at 2.2mw to 2.8mw, the detection
The focal length of distance and first lens is 8mm；And it is located at the range of 3.2mw to 3.8mw in the power of the light-emitting tube
In the case where interior, the focal length of the detecting distance and first lens is 12mm.
Preferably, the dust sensor further include: main cavity, the air duct, the light emission component, the photosensitive member
Part and the processing element are located in main chamber body, are wherein provided with air intake, main chamber on the antetheca of main chamber body
Gas outlet is provided on the rear wall of body.
Preferably, the dust sensor further include: air extractor is located at the gas outlet, is used for the air
Stream is introduced from the air intake, is flowed out by the air duct from gas outlet.
Preferably, it is provided with light trapping in main chamber body, for absorbing the light of the light-emitting tube transmitting, the lens
Component is between the light trapping and the light-emitting tube.
Preferably, the dust sensor further includes thermistor, the temperature for environment where detecting dust to be measured.
Preferably, the light emission component further include: preposition diaphragm and postposition diaphragm include one in the lens subassembly
In the case where lens, along the path direction of the light of light-emitting tube transmitting, the postposition diaphragm is located under the lens
Trip, the preposition diaphragm are located at the downstream of the postposition diaphragm；Or in the case that the lens subassembly includes two lens, edge
The path direction of the light of light-emitting tube transmitting, the postposition diaphragm be located at second lens and first lens it
Between, the preposition diaphragm is located at the downstream of first lens.
Through the above technical solutions, the inspection for converging the lens of the light in the photosensitive element and the lens subassembly is arranged
Ranging from so that the dust sensor resolution ratio highest.So by considering between photosensitive element and the lens of converged light
Influence of the detecting distance to the resolution ratio of dust sensor, improve dust sensor by the way that the detecting distance is arranged
Resolution ratio.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the overview diagram of the dust sensor provided according to an embodiment of the present invention；
Fig. 2 is the top view of the main cavity of the dust sensor provided according to an embodiment of the present invention；
Fig. 3 is the diagram of air hole on the air duct of the dust sensor provided according to an embodiment of the present invention；
Fig. 4 is the assembly diagram of the dust sensor provided according to an embodiment of the present invention；
Fig. 5 is the assembly diagram of the Laser emission component and circuit board that provide according to an embodiment of the present invention；
Fig. 6 is the schematic diagram of the air flow direction by photosensitive element provided according to an embodiment of the present invention；
Fig. 7 is the diagram of the main cavity upper cover provided according to an embodiment of the present invention；
Fig. 8 is the schematic diagram of the metal shell of the dust sensor provided according to an embodiment of the present invention；
Fig. 9 a to 9c is the topology view of the Laser emission component provided according to an embodiment of the present invention；
Figure 10 is the Laser emission component that the lens subassembly provided according to an embodiment of the present invention includes a lens
Schematic diagram；
Figure 11 is that the lens subassembly provided according to an embodiment of the present invention includes that the emitting modules of lens cuts open
Face view；
Figure 12 is the Laser emission group that the lens subassembly provided according to an embodiment of the present invention includes two lens
The schematic diagram of part；And
Figure 13 is that the lens subassembly provided according to an embodiment of the present invention includes that the emitting modules of two lens cuts open
Face view.
Description of symbols
1 dust sensor, 2 main cavity
3 fan, 4 fan mounting bit is set
5 rear wall, 6 Laser emission component mounting groove
8 link slot, 10 air duct
11 photosensitive element, 12 light trapping
13 antetheca, 15 air intake
16 thermistor, 17 air inlet
18 upper cover, 20 baffle
21 circuit board, 22 air hole
The preposition diaphragm of 26 metal shell 27
28 detection hole, 29 postposition diaphragm
30 LASER Discharge Tube, 31 LASER Discharge Tube mounting groove
35 Laser emission component, 36,37,38 lens
40 test points
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Referring to figs. 1 to Fig. 5, it may include: air duct 10, dust content to be measured that the present invention, which provides a kind of dust sensor 1,
Air stream circulate in air duct 10；Light emission component (Laser emission component 35 as shown in the figure), comprising: light-emitting tube is (such as
LASER Discharge Tube 30 shown in figure), the air stream to circulate in the air duct 10 and lens subassembly, position are irradiated for emitting light
In the light in the optical path of the light, emitted for converging the light-emitting tube；Photosensitive element 11 is located in the air duct 10, uses
The scattering light generated after receiving the light irradiation dust；And processing element, dust content is determined based on the scattering light,
In, the detecting distance for the lens for converging the light in the photosensitive element 11 and the lens subassembly makes the dust sensor
1 resolution ratio highest.So by considering the detecting distance between photosensitive element and the lens of converged light to dust sensor
The influence of resolution ratio improves the resolution ratio of dust sensor by the way that the detecting distance is arranged.
Wherein, light-emitting tube for example can be but be not limited to LASER Discharge Tube, infrared transmitting tube, will hereinafter be sent out with laser
It penetrates for pipe 30 and describes the present invention.Processing element can be designed as the form of circuit board 21 as shown in Figure 4, Laser emission group
Part 35, photosensitive element 11 are connect with circuit board 21, and Fig. 5 gives the dress of Laser emission component and circuit board in a kind of embodiment
With diagram.
As shown in Figures 2 to 4, the dust sensor 1 can also include: main cavity 2, the air duct 10, light hair
Component 35, the photosensitive element 11 and the processing element (circuit board 21 as shown in the figure) is penetrated to be located in main chamber body 2, wherein
It is provided with air intake 15 on the antetheca 13 of main chamber body 2, is provided with gas outlet on the rear wall 5 of main chamber body 2.So as to be measured
The air stream of environment enters air duct 10 by air intake 15 and then flows out from gas outlet, is detected with realizing to dust.Wherein air duct
10 are connected between air intake 15 and gas outlet.
As shown, light trapping 12 can be set in main chamber body 2, for absorbing the light-emitting tube transmitting
Light, the lens subassembly is between the light trapping 12 and the light-emitting tube.Photosensitive element 11 is placed in air duct 10, laser
The laser that emitting module 35 issues can be parallel with photosensitive element 11.The laser emitted can by photosensitive element 11 just on
Side, is irradiated into the light trapping 12 in main cavity 2, and light trapping 12 absorbs the laser injected, to reduce the noise of reflected light.It is described
Light absorbent production can be used in light trapping 12, or carries out matt processing to non-light absorbent.
Due to temperature will affect it is detected as a result, thus in order to improve the accuracy of dust sensor, the dust passes
Sensor can also include thermistor 16, the temperature for environment where detecting dust to be measured.In order to which thermistor is detected
Temperature more accurately reflects environment temperature, and the thermistor can be installed on circuit board 21 in the following, being located at the wind of main cavity 2
Among road, for being modified according to environment temperature to dust sensor output result.
In order to guide the circulation of air stream, the dust sensor can also include: air extractor, be located at the gas outlet
Place is flowed out for introducing the air stream from the air intake, by the air duct from gas outlet.As shown in Fig. 2, the pumping
Device of air can be fan 3.Fan 3 is mounted on the rear wall 5 of main cavity 2 by fan mounting groove 4, wherein the position of fan 3
It can be gas outlet position.
The mode that fan 3 can use pumping forms negative pressure and air stream is introduced, from the air intake 15 by described
Air duct 10 is flowed out from gas outlet, as shown in Fig. 2, the air stream is flowed according to air flow direction shown in arrow.Wherein flow through sense
Optical element 11, Laser emission component 35 is mounted in main cavity 2 by Laser emission component mounting groove 6, so that Laser emission
The laser that pipe 30 emits can converge in the top of photosensitive element 11, so that photosensitive element 11 receives the scattering scattered through dust
Light.Air duct 10 can be L shape, and the intermediate angle with L shape air duct 10 can be obtuse angle, and such light will not shine from fan 3
It is mapped on photosensitive element 11, influences detection accuracy.Air hole 22 is opened in the tail portion in the air duct 10, so that air stream is from air hole 22
Outflow, air hole 22 can be as shown in Figure 3.
As shown in figure 4, main cavity 2 may include upper cover 18 and main body 25, wherein air intake 15 can be located in upper cover 18
Or in main body 25.Air stream enters main cavity 2 from blowhole 15, may then pass through air inlet 17 and then wind on circuit board 21
Road 10, Fig. 6 show the air flow direction of the air stream by photosensitive element 11.
As shown in fig. 7, upper cover 18 may include baffle 20, after air stream is stopped by baffle 20, by circuit board 21
Air inlet 17 enters in main cavity 2.Baffle 20 can stop large dust particle and sundries, avoid to specific in air stream
The detection of particle (such as PM2.5).
In addition, metal shell 26 is used by link slot 8 as shown in figure 8, main cavity 2 can be wrapped up by metal shell 26
Conductive material is connected with the GND of circuit board 21, to shield interference, improves the stability of sensor.In one embodiment,
Connecting material can be metal spring, and metal spring is assembled in link slot 8, and spring one end connects circuit board 21, other end connection
Metal shell 20.
Laser emission component 35 is described below with reference to Fig. 9 a to Fig. 9 c.LASER Discharge Tube 30 as shown in the figure is mounted on laser
On transmitting tube mounting groove 31；Laser emission component 35 has heat release hole on the wall of LASER Discharge Tube 30, to avoid temperature pair
30 power of LASER Discharge Tube has an impact.It is provided with detection hole 28 on Laser emission component 35, photosensitive element 11 can be installed pair
It should be located on circuit board 21 in the lower section of detection hole 28.
Wherein, the lens subassembly may include a lens or two lens, in the case where including two lens, the
One lens, for converging the light of the light-emitting tube transmitting；Second lens, be located at the light-emitting tube and first lens it
Between, for so that the light of light-emitting tube transmitting is parallel with the optical axis of first lens.
The light emission component 35 can also include: preposition diaphragm 27 and postposition diaphragm 29, to prevent light from reflecting.Described
In the case that lens subassembly includes a lens, along the path direction of the light of light-emitting tube transmitting, the postposition diaphragm
29 are located at the downstream of the lens 36, and the preposition diaphragm is located at the downstream of the postposition diaphragm 29, as shown in figure 11；Or institute
In the case where lens subassembly is stated including two lens, along the path direction of the light of light-emitting tube transmitting, the postposition light
For door screen 29 between second lens 38 and first lens 37, the preposition diaphragm 27 is located at first lens 37
Downstream, as shown in figure 13.
In the case where introducing lens subassembly including a lens by specific embodiment below with reference to Figure 10 and Figure 11
The determination of detecting distance.
Test point 40 is that laser passes through the point converged after lens 36 in figure, and photosensitive element 11 is located at 40 lower section of test point, sense
Optical element 11 is at a distance from detecting distance L, that is, test point 40 to lens 36 of lens 36.For with the Laser emission of certain power
Pipe 30, for same lens, if LASER Discharge Tube 30 is in different location, the test point 40 of 36 converged light of lens can also change
Become.In the case where lens subassembly includes a lens, along the path direction of laser, preposition diaphragm 27 and postposition diaphragm 29
In the downstream of lens 36.
In practice process, inventors have found that test point 40 is different, dust sensor 1 in the case where a lens
Resolution ratio is also different.Therefore, it is obtained by following experiment: being located at the range of 2.2mw to 2.8mw in the power of the light-emitting tube
In the case that the diameter of the interior and described lens is 6mm, dust sensor resolution ratio highest when the detecting distance L is 12mm；With
And in the range of the power of the light-emitting tube is located at 3.2mw to 3.8mw and in the case that the diameter of the lens is 6mm,
Dust sensor resolution ratio highest when the detecting distance L is 15mm.Certainly, those skilled in the art can be according to different light
The diameters of the power of transmitting tube and lens determines suitable detecting distance L.
Change detecting distance L at a distance from lens 36 by changing LASER Discharge Tube 30, records under different detecting distances
The testing result of dust sensor will test result and obtain error amount compared with the detected value of reference instrument, then will be different
The error amount of detecting distance L is compared, and the minimum corresponding detecting distance L of error amount is so that dust sensor 1 reaches most
High-resolution value.
The power that table 1 to table 4 gives LASER Discharge Tube be located in the range of 2.2mw to 2.8mw and the lens it is straight
Diameter be 6mm in the case where difference detecting distance L when dust sensor error.
Table 1
Table 2
Table 3
Table 4
By table 1 to table 4 it can be concluded that, in the range of the power of LASER Discharge Tube 30 is located at 2.2mw to 2.8mw and thoroughly
In the case that the diameter of mirror 36 is 6mm, when the detecting distance L is 12mm, the resolution ratio highest of dust sensor.In above-mentioned reality
650 wave band of laser transmitting tubes can be used in testing, and be certainly not limited to the wave band.
The power that table 5 to table 8 gives LASER Discharge Tube be located in the range of 3.2mw to 3.8mw and the lens it is straight
Diameter be 6mm in the case where difference detecting distance L when dust sensor error.
Table 5
Table 6
Table 7
Table 8
By table 5 to table 8 it can be concluded that, in the range of the power of LASER Discharge Tube 30 is located at 3.2mw to 3.8mw and thoroughly
In the case that the diameter of mirror 36 is 6mm, when the detecting distance L is 15mm, the resolution ratio highest of dust sensor.
In the case where introducing lens subassembly including two lens by specific embodiment below with reference to Figure 12 and Figure 13
The determination of detecting distance.
As shown in Figure 12 and Figure 13, the light of 38 collimation laser transmitting tube 30 of lens transmitting, makes it be parallel to lens 37, lens
37 converge to directional light test point 40 (i.e. the focuses of lens 37), the detecting distance L and detection of photosensitive element 11 and lens 37
Point 40 to lens 37 distance (i.e. the focal lengths of lens 37).For with the LASER Discharge Tube 30 of certain power, different convergences is saturating
Mirror (has different focal length), and the test point 40 of convergence also can be different.In the case where lens subassembly includes two lens, along sharp
The path direction of light is successively lens 38, postposition diaphragm 29, lens 37, preposition diaphragm 27.
In practice process, inventors have found that test point 40 is different, dust sensor 1 in the case where two lens
Resolution ratio is also different.Therefore, it is obtained by following experiment: being located at the range of 2.2mw to 2.8mw in the power of the light-emitting tube
In the case where interior, dust sensor resolution ratio highest when the detecting distance L is 8mm；And the power in the light-emitting tube
In the case where in the range of 3.2mw to 3.8mw, dust sensor resolution ratio highest when the detecting distance L is 12mm.When
So, those skilled in the art can determine suitable detecting distance L according to the power of different light-emitting tubes.
Change detecting distance L by changing lens 36 (focal length for changing lens 36), records under different detecting distances
The testing result of dust sensor will test result and obtain error amount compared with the detected value of reference instrument, then will be different
The error amount of detecting distance L is compared, and the minimum corresponding detecting distance L of error amount is so that dust sensor 1 reaches most
High-resolution value, and the lens that focal length is detecting distance L are then to enable to dust sensor to differentiate under the power condition
Rate reaches highest lens.
The power that table 9 to table 12 gives LASER Discharge Tube different inspections in the case where being located in the range of 2.2mw to 2.8mw
The error of dust sensor when ranging is from L (lens 37 with different focal length).
Table 9
Table 10
Table 11
Table 12
By table 9 to table 12 it can be concluded that, in the range of the power of LASER Discharge Tube 30 is located at 2.2mw to 2.8mw
In the case of, when the detecting distance L is 8mm (using focal length is the lens of 8mm as lens 37), the resolution of dust sensor
Rate highest.
The power that table 13 to table 16 gives LASER Discharge Tube is different in the case where being located in the range of 3.2mw to 3.8mw
The error of dust sensor when detecting distance L (lens 37 with different focal length).
Table 13
Table 14
Table 15
Table 16
By table 13 to table 16 it can be concluded that, in the range of the power of LASER Discharge Tube 30 is located at 3.2mw to 3.8mw
In the case of, when the detecting distance L is 12mm (using focal length is the lens of 12mm as lens 37), point of dust sensor
Resolution highest.
It should be noted that the present invention is not limited to the power of above-mentioned LASER Discharge Tube, thus be also not necessarily limited to above-mentioned detection away from
From L.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (6)
1. a kind of dust sensor, which is characterized in that the dust sensor includes:
The air stream in air duct, dust content to be measured circulates in the air duct；
Light emission component, comprising:
Light-emitting tube irradiates the air stream to circulate in the air duct for emitting light, and
Lens subassembly, in the optical path of the light, for converging the light of the light-emitting tube transmitting；
Photosensitive element is located in the air duct, for receiving the scattering light generated after the light irradiation dust；And
Processing element determines dust content based on the scattering light,
Wherein, the detecting distance for the lens for converging the light in the photosensitive element and the lens subassembly passes the dust
The resolution ratio highest of sensor,
The lens subassembly includes a lens or two lens, wherein described two lens are respectively that the first lens and second are saturating
Mirror,
In the case where the lens subassembly includes a lens,
In the range of the power of the light-emitting tube is located at 2.2mw to 2.8mw and the case where the diameter of the lens is 6mm
Under, the detecting distance is 12mm；And
In the range of the power of the light-emitting tube is located at 3.2mw to 3.8mw and the case where the diameter of the lens is 6mm
Under, the detecting distance is 15mm,
In the case where the lens subassembly includes two lens,
First lens are used to converge the light of the light-emitting tube transmitting；Second lens are located at the light-emitting tube and institute
State between the first lens, for so that the light-emitting tube transmitting light it is parallel with the optical axis of first lens,
In the case where in the range of the power of the light-emitting tube is located at 2.2mw to 2.8mw, the detecting distance and described
The focal length of one lens is 8mm；And
In the case where in the range of the power of the light-emitting tube is located at 3.2mw to 3.8mw, the detecting distance and described
The focal length of one lens is 12mm.
2. dust sensor according to claim 1, which is characterized in that the dust sensor further include: main cavity, institute
Air duct, the light emission component, the photosensitive element and the processing element is stated to be located in main chamber body,
It is wherein provided with air intake on the antetheca of main chamber body, is provided with gas outlet on the rear wall of main chamber body.
3. dust sensor according to claim 2, which is characterized in that the dust sensor further include: air extractor,
At the gas outlet, flowed out for introducing the air stream from the air intake, by the air duct from gas outlet.
4. dust sensor according to claim 2, which is characterized in that be provided with light trapping in main chamber body, be used for
The light of the light-emitting tube transmitting is absorbed, the lens subassembly is between the light trapping and the light-emitting tube.
5. dust sensor according to claim 1, which is characterized in that the dust sensor further includes thermistor,
Temperature for environment where detecting dust to be measured.
6. dust sensor according to any one of claims 1-5, which is characterized in that the light emission component also wraps
It includes: preposition diaphragm and postposition diaphragm,
In the case where the lens subassembly includes a lens, along the path direction of the light of light-emitting tube transmitting, institute
The downstream that postposition diaphragm is located at the lens is stated, the preposition diaphragm is located at the downstream of the postposition diaphragm；Or
It is described along the path direction of the light of light-emitting tube transmitting in the case that the lens subassembly includes two lens
Between second lens and first lens, the preposition diaphragm is located under first lens postposition diaphragm
Trip.
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| CN201610674439.1A CN106053311B (en) | 2016-08-16 | 2016-08-16 | A kind of dust sensor |
| PCT/CN2017/082953 WO2018032802A1 (en) | 2016-08-16 | 2017-05-03 | Dust sensor |
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| CN201610674439.1A CN106053311B (en) | 2016-08-16 | 2016-08-16 | A kind of dust sensor |
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| CN106053311B true CN106053311B (en) | 2019-04-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018032802A1 (en) * | 2016-08-16 | 2018-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
| KR20180082076A (en) * | 2017-01-10 | 2018-07-18 | 현대자동차주식회사 | Dust sensor having flow control function |
| CN106872326B (en) * | 2017-04-12 | 2020-05-05 | 广东美的制冷设备有限公司 | Automatic zero setting method of dust sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6337235A (en) * | 1986-07-31 | 1988-02-17 | Hitachi Electronics Eng Co Ltd | Apparatus for detecting fine particle in liquid |
| US4990795A (en) * | 1988-07-30 | 1991-02-05 | Horiba, Ltd. | Particle counter with photointensity compensation |
| CN105259086A (en) * | 2015-10-29 | 2016-01-20 | 广东美的制冷设备有限公司 | Detection method and system of dust concentration |
| CN205449751U (en) * | 2016-03-23 | 2016-08-10 | 广东美的制冷设备有限公司 | Dust concentration sensor |
| CN205982006U (en) * | 2016-08-16 | 2017-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100220315A1 (en) * | 2009-02-27 | 2010-09-02 | Beckman Coulter, Inc. | Stabilized Optical System for Flow Cytometry |
| CN103308432B (en) * | 2013-07-05 | 2015-06-24 | 河北工业大学 | Continuous spectrum scattering type particle measurement method |
| CN104374677B (en) * | 2014-10-09 | 2017-04-19 | 南京市计量监督检测院 | Measuring device and method for dust concentration |
-
2016
- 2016-08-16 CN CN201610674439.1A patent/CN106053311B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6337235A (en) * | 1986-07-31 | 1988-02-17 | Hitachi Electronics Eng Co Ltd | Apparatus for detecting fine particle in liquid |
| US4990795A (en) * | 1988-07-30 | 1991-02-05 | Horiba, Ltd. | Particle counter with photointensity compensation |
| CN105259086A (en) * | 2015-10-29 | 2016-01-20 | 广东美的制冷设备有限公司 | Detection method and system of dust concentration |
| CN205449751U (en) * | 2016-03-23 | 2016-08-10 | 广东美的制冷设备有限公司 | Dust concentration sensor |
| CN205982006U (en) * | 2016-08-16 | 2017-02-22 | 广东美的制冷设备有限公司 | Dust sensor |
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