CN106872325A - A kind of dust sensor - Google Patents
A kind of dust sensor Download PDFInfo
- Publication number
- CN106872325A CN106872325A CN201710221303.XA CN201710221303A CN106872325A CN 106872325 A CN106872325 A CN 106872325A CN 201710221303 A CN201710221303 A CN 201710221303A CN 106872325 A CN106872325 A CN 106872325A
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- Prior art keywords
- laser
- dust sensor
- sample detecting
- light path
- light
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000428 dust Substances 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 claims abstract description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000003466 welding Methods 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
-
- 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—Investigating concentration of particle suspensions by optical means
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The embodiment of the invention discloses a kind of dust sensor, including：The upper casing and lower casing being oppositely arranged, upper casing and lower casing form a receiving cavity；Laser, reflective mirror and sample detecting chamber in receiving cavity, reflective mirror are used to receive the laser beam of laser transmitting, and it is reflected, and form the reflected beams, inject sample detecting chamber；Light-sensitive element below sample detecting chamber, light-sensitive element is used for according to the reflected beams by the dust quantity or concentration in the beam detection air behind sample detecting chamber.As can be seen here, the dust sensor that the embodiment of the present invention is provided, can cause that the laser beam that the reflected beams formed after the mirror reflection are launched with laser forms an angle, so as in the case of each composition component size in not changing the dust sensor, reduce between the laser and the sample detecting chamber and distance, and then the overall dimensions of the reduction dust sensor, expand the range of application of the laser sensor.
Description
This application claims in submission Patent Office of the People's Republic of China, Application No. 201710184279.7, invention on 03 24th, 2017
A kind of priority of the Chinese patent application of entitled " dust sensor ", entire contents are hereby incorporated by reference the application
In.
Technical field
The present invention relates to sensor technical field, more particularly to a kind of dust sensor.
Background technology
Pm2.5 sensors, also known as dust sensor or dust sensor, for check dust in air concentration or
Number, wherein, the concentration or number of dust are represented with pm2.5 values, specifically, the concentration or number of dust are bigger, pm2.5 values are got over
Greatly；The concentration or number of dust are smaller, and pm2.5 values are smaller.
Existing pm2.5 sensors include two kinds of infrared sensor and laser sensor, wherein, the high precision of laser sensor
It is more promising in the precision of infrared sensor.But, the length of current laser sensor is more long, and overall dimensions are larger,
Limit the range of application of laser sensor.
The content of the invention
In order to solve the above technical problems, a kind of dust sensor is the embodiment of the invention provides, to reduce dust sensor
Length, so as to reduce the overall dimensions of the dust sensor, the use scope of expansion of laser light sensor.
To solve the above problems, following technical scheme is the embodiment of the invention provides：
A kind of dust sensor, including：
The upper casing and lower casing being oppositely arranged, the upper casing and lower casing form a receiving cavity；
Laser, reflective mirror and sample detecting chamber in the receiving cavity, wherein, the reflective mirror is used to receive
The laser beam of the laser transmitting, and it is reflected, the reflected beams are formed, inject the sample detecting chamber；
Light-sensitive element below the sample detecting chamber, the light-sensitive element is used to be passed through according to the reflected beams
Dust quantity or concentration in beam detection air behind the sample detecting chamber.
Optionally, light path pedestal is additionally provided with the receiving cavity, laser installation is provided with the light path pedestal
Hole, reflective mirror mounting hole, the first light path hole and the second light path hole；Wherein, the laser mounting hole is used to install the laser
Device, the reflective mirror mounting hole is used to install the reflective mirror, and the first light path hole is used to transmit the laser transmitting
Laser beam, the second light path hole is used to transmit the reflected beams of the mirror reflection.
Optionally, the light path pedestal includes first of the Laser beam propagation direction parallel to laser transmitting
Arm and the second support arm parallel to the reflected beams transmission direction, the first support arm and the second support arm into preset angle
Degree.
Optionally, the predetermined angle is more than or equal to 0 degree and less than 180 degree.
Optionally, the predetermined angle is 90 degree.
Optionally, also include：
Fan in the space that the first support arm and second support arm of the light path pedestal are formed, in the sampling
Air-flow is formed between test chamber and external environment.
Optionally, the fan is aerofoil fan, effluent fan or cross flow fan.
Optionally, also including the circuit board being fixedly connected with the light path pedestal, the circuit board is used to be the laser
Device, the light-sensitive element and the fan provide drive signal.
Optionally, the upper casing and the lower casing are metal shell.
Optionally, the upper casing and the lower casing are non-metal shell, and the dust sensor also includes：Positioned at upper casing and
The radome of the lower casing outer surface.
Compared with prior art, above-mentioned technical proposal has advantages below：
The dust sensor that the embodiment of the present invention is provided, including：The upper casing and lower casing being oppositely arranged, the upper casing is with
Hull shape is into a receiving cavity；Laser, reflective mirror and sample detecting chamber in the receiving cavity, wherein, it is described reflective
Mirror is used to receive the laser beam of the laser transmitting, and it is reflected, and forms the reflected beams, injects the sampling inspection
Survey chamber；Light-sensitive element below the sample detecting chamber, the light-sensitive element is used for according to the reflected beams by institute
State the dust quantity or concentration in the beam detection air behind sample detecting chamber.As can be seen here, the embodiment of the present invention is provided
Dust sensor, can the laser transmitting laser beam directive described in reflective mirror when, thus it is possible to vary the laser
The transmission direction of light beam so that the reflected beams formed after the mirror reflection and the laser beam an into clamp
Angle, so as in the case of each composition component size in not changing the dust sensor, reduce the laser and be adopted with described
The distance between sample test chamber, and then reduce the overall dimensions of the dust sensor, expand the application of the laser sensor
Scope.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The structural blast schematic diagram of the dust sensor that Fig. 1 is provided by one embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Many details are elaborated in the following description in order to fully understand the present invention, but the present invention can be with
Other manner described here is different from using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As shown in figure 1, a kind of dust sensor is the embodiment of the invention provides, including：
The upper casing 1 and lower casing 2 being oppositely arranged, the upper casing 1 and lower casing 2 form a receiving cavity；
Laser 3, reflective mirror 4 and sample detecting chamber 5 in the receiving cavity, wherein, the reflective mirror 4 is used for
The laser beam of the transmitting of the laser 3 is received, and it is reflected, form the reflected beams, inject the sample detecting chamber
5；
Positioned at the light-sensitive element 6 of the lower section of the sample detecting chamber 5, the light-sensitive element 6 is used for according to the reflected beams
By dust quantity or concentration in the beam detection air behind the sample detecting chamber 5.
During specific works, the laser beam of the transmitting of the laser 3 reflects to form the reflected beams directive through the reflective mirror 4
Behind the sample detecting chamber 5, the reflected beams are interacted with the air-flow in the sample detecting chamber 5, and the light-sensitive element 6 is used for
When receiving the reflected beams in the sample detecting chamber 5 and running into the particulate matter in air-flow, produced scattered beam or transmission
Light beam, and intensity, pulse frequency according to the scattered beam or transmitted light beam etc., electric signal is exported, the electric signal is based on
The dust quantity in specific discharge is calculated, with dust concentration or number in this determination air.
As can be seen here, the dust sensor that the embodiment of the present invention is provided changes the laser 3 and launches by reflective mirror 4
Laser beam optical path direction, no longer always along linear transmission, so as in the dust sensor each component size it is constant
In the case of, the length of the reduction dust sensor, and then reduce the overall dimensions of the dust sensor, expansion of laser light device
The range of application of sensor.
On the basis of above-described embodiment, in one embodiment of the invention, light is additionally provided with the receiving cavity
Roadbed seat 7, is provided with laser mounting hole 71, reflective mirror mounting hole 72, the first light path hole (in figure not on the light path pedestal 7
Show) and the second light path hole (not shown), wherein, the laser mounting hole 71 is used to install the laser 3, described
Reflective mirror mounting hole 72 is used to install the reflective mirror 4, and the first light path hole is used to transmit the laser of the transmitting of the laser 3
Light beam, the second light path hole is used to transmit the reflected beams of the reflection of the reflective mirror 4.During specific works, the laser 3 is pacified
On the laser mounting hole 71, the reflective mirror 4 is arranged on the reflective mirror mounting hole 72, and the laser 3 is sent out
The laser beam penetrated reflects through reflective mirror 4 described in the first light path hole directive through the reflective mirror 4, after forming the reflected beams,
Again through sample detecting chamber 5 described in the second light path hole directive.
Specifically, on the basis of above-described embodiment, in one embodiment of the invention, the laser 3 includes swashing
Optical diode and condenser lens, accordingly, the laser mounting hole 71 on the light path pedestal 7 is also installed including laser diode
Hole and condenser lens mounting hole.But the present invention is not limited this, specifically depend on the circumstances.
On the basis of above-described embodiment, in one embodiment of the invention, the light path pedestal 7 is included parallel to institute
State laser 3 transmitting Laser beam propagation direction first support arm and second parallel to the reflected beams transmission direction
Arm, the first support arm and the second support arm into predetermined angle, so that the light of the laser beam of the transmitting of the laser 3
The reflected beams of road and the reflection of the reflective mirror 4 point-blank, are not constituted respectively with the dust sensor is not changed
On the premise of component size, reduce the air line distance between the laser 3 and the sample detecting chamber 5, reduce the dust
The length of sensor, and then reduce the overall dimensions of the dust sensor.Wherein, the predetermined angle is more than or equal to 0 degree
And less than 180 degree.
Optionally, on the basis of above-described embodiment, in one embodiment of the invention, the predetermined angle is 90
Spend, but the present invention is not limited this, is specifically depended on the circumstances.
On the basis of above-described embodiment, in one embodiment of the invention, the dust sensor also includes：It is located at
The fan 8 in space that the first support arm and second support arm of the light path pedestal 7 are formed, in the He of sample detecting chamber 5
Air-flow is formed between external environment, specifically, the fan 8 can be used for the air push-in sampling inspection in external environment
Chamber 5 is surveyed, or for the air in the sample detecting chamber 5 to be suctioned out into the external environment, so as in the sample detecting
Air flow is formed between chamber 5 and external environment.Optionally, in embodiments of the present invention, the fan 8 can be axle stream wind
Fan, or effluent fan, can also can drive the device of air flow, this hair for other arbitrary forms such as cross flow fans
It is bright that this is not limited, specifically depend on the circumstances.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the dust sensor also includes：
The circuit board 9 being fixedly connected with the light path pedestal 7, the circuit board 9 is used to be the laser 3, the and of the light-sensitive element 6
The grade of the fan 8 element provides drive signal.Specifically, in one embodiment of the invention, the light-sensitive element 6 is welded
It is connected on the circuit board 9, the light path pedestal 7 is fixed on the circuit board 9 by a fixed structure, and the fan 8 is welded
It is connected on the circuit board 9.
During specific assembling, first the light-sensitive element 6 is welded on the circuit board 9, the light path pedestal 7 is fixed on
On the circuit board 9, by the fan welding on the circuit board 9, then, by the light-sensitive element 6, the light path pedestal
7th, the overall structure of the circuit board 9 and the composition of the fan 8 is put into the lower casing 2, then covers upper casing 1, completes the powder
The assembling of dust sensor.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the upper casing 1 and the lower casing 2
It is metal shell, metal shell is being set by the both sides of the circuit board 9, the both sides to the circuit board shields.
In another embodiment of the present invention, the upper casing 1 and the lower casing 2 are non-metal shell, and the dust is passed
Sensor also includes：Positioned at the radome of upper casing 1 and the outer surface of the lower casing 2, to utilize the radome to the circuit board
Both sides are shielded.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the reflective mirror can be plane
Mirror, or prism, the present invention is not limited this, is specifically depended on the circumstances.
Additionally, the dust sensor that the embodiment of the present invention is provided also includes light trapping, absorbed with using the light trapping
The reflected beams pass through the light beam behind the sample detecting chamber, it is to avoid the reflected beams are reflecting after passing through sample detecting chamber
The sample detecting chamber is gone back to, the testing result of the light-sensitive element is influenceed.
To sum up shown, the dust sensor that the embodiment of the present invention is provided, the reflective mirror is launched with the laser
Laser beam forms an angle, so as in reflective mirror described in the laser beam directive of laser transmitting, thus it is possible to vary institute
State the transmission direction of laser beam so that the reflected beams and the laser beam formed after the mirror reflection into
Certain angle, so as in the case of each composition component size in not changing the dust sensor, reduce the laser with
Between the sample detecting chamber and distance, and then reduce the overall dimensions of the dust sensor, expand the laser sensing
The range of application of device, in can be applied not only to various traditional detection means, can also be applied to Intelligent worn device and its
In his volume requirement device higher.
Various pieces are described by the way of progressive in this specification, and what each some importance was illustrated is and other parts
Difference, between various pieces identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
Embodiment illustrated herein is not intended to be limited to, and is to fit to consistent with principles disclosed herein and features of novelty
Scope most wide.
Claims (10)
1. a kind of dust sensor, it is characterised in that including：
The upper casing and lower casing being oppositely arranged, the upper casing and lower casing form a receiving cavity；
Laser, reflective mirror and sample detecting chamber in the receiving cavity, wherein, the reflective mirror is used to receive described
The laser beam of laser transmitting, and it is reflected, the reflected beams are formed, inject the sample detecting chamber；
Light-sensitive element below the sample detecting chamber, the light-sensitive element is used for according to the reflected beams described in
Dust quantity or concentration in beam detection air behind sample detecting chamber.
2. dust sensor according to claim 1, it is characterised in that light roadbed is additionally provided with the receiving cavity
Seat, is provided with laser mounting hole, reflective mirror mounting hole, the first light path hole and the second light path hole on the light path pedestal；Wherein,
The laser mounting hole is used to install the laser, and the reflective mirror mounting hole is used to installing the reflective mirror, and described the
One light path hole is used to transmit the laser beam of the laser transmitting, and the second light path hole is used to transmit the mirror reflection
The reflected beams.
3. dust sensor according to claim 2, it is characterised in that the light path pedestal is included parallel to the laser
The first support arm and the second support arm parallel to the reflected beams transmission direction in the Laser beam propagation direction of device transmitting, it is described
First support arm and the second support arm into predetermined angle.
4. dust sensor according to claim 3, it is characterised in that the predetermined angle is more than or equal to 0 °, and small
In 180 °.
5. dust sensor according to claim 4, it is characterised in that the predetermined angle is 90 degree.
6. dust sensor according to claim 4, it is characterised in that also include：
Fan in the space that the first support arm and second support arm of the light path pedestal are formed, in the sample detecting
Air-flow is formed between chamber and external environment.
7. dust sensor according to claim 6, it is characterised in that the fan be aerofoil fan, effluent fan or
Cross flow fan.
8. the dust sensor according to claim any one of 1-7, it is characterised in that also including solid with the light path pedestal
The circuit board of fixed connection, the circuit board is used to provide drive signal for the laser, the light-sensitive element and the fan.
9. dust sensor according to claim 1, it is characterised in that the upper casing and the lower casing are metal shell.
10. dust sensor according to claim 1, it is characterised in that the upper casing and the lower casing are non-metal case
Body, the dust sensor also includes：Positioned at the radome of upper casing and the lower casing outer surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184279 | 2017-03-24 | ||
| CN2017101842797 | 2017-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106872325A true CN106872325A (en) | 2017-06-20 |
Family
ID=59160013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710221303.XA Pending CN106872325A (en) | 2017-03-24 | 2017-04-06 | A kind of dust sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106872325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098281A (en) * | 2020-08-12 | 2020-12-18 | 深圳市汇投智控科技有限公司 | Laser dust sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146819A (en) * | 1998-11-09 | 2000-05-26 | Mitsubishi Electric Corp | Optical system for optical dust sensor |
| CN201251547Y (en) * | 2008-06-23 | 2009-06-03 | 李少华 | Synchronous online monitor device of flue dust and special gas |
| CN201255720Y (en) * | 2008-07-17 | 2009-06-10 | 合肥百信机电科技有限公司 | Optical measurement device for bug dust |
| CN203616851U (en) * | 2013-12-31 | 2014-05-28 | 重庆梅安森科技股份有限公司 | Laser methane concentration sensor |
| CN204228597U (en) * | 2014-12-05 | 2015-03-25 | 郑州光力科技股份有限公司 | A kind of laser gas pick-up unit |
| CN204556452U (en) * | 2015-01-28 | 2015-08-12 | 武汉四方光电科技有限公司 | A kind of laser dust sensor adopting aerofoil fan |
| CN105486620A (en) * | 2016-02-02 | 2016-04-13 | 广东美的制冷设备有限公司 | Air purifier, laser dust concentration sensor and detection method thereof |
| CN205449796U (en) * | 2015-12-25 | 2016-08-10 | 埃尔创利有限公司 | Dust sensor |
| CN205538639U (en) * | 2016-03-30 | 2016-08-31 | 林康 | Gas analysis appearance air chamber device |
| CN205786214U (en) * | 2015-12-31 | 2016-12-07 | 郑州炜盛电子科技有限公司 | Laser dust sensor |
-
2017
- 2017-04-06 CN CN201710221303.XA patent/CN106872325A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146819A (en) * | 1998-11-09 | 2000-05-26 | Mitsubishi Electric Corp | Optical system for optical dust sensor |
| CN201251547Y (en) * | 2008-06-23 | 2009-06-03 | 李少华 | Synchronous online monitor device of flue dust and special gas |
| CN201255720Y (en) * | 2008-07-17 | 2009-06-10 | 合肥百信机电科技有限公司 | Optical measurement device for bug dust |
| CN203616851U (en) * | 2013-12-31 | 2014-05-28 | 重庆梅安森科技股份有限公司 | Laser methane concentration sensor |
| CN204228597U (en) * | 2014-12-05 | 2015-03-25 | 郑州光力科技股份有限公司 | A kind of laser gas pick-up unit |
| CN204556452U (en) * | 2015-01-28 | 2015-08-12 | 武汉四方光电科技有限公司 | A kind of laser dust sensor adopting aerofoil fan |
| CN205449796U (en) * | 2015-12-25 | 2016-08-10 | 埃尔创利有限公司 | Dust sensor |
| CN205786214U (en) * | 2015-12-31 | 2016-12-07 | 郑州炜盛电子科技有限公司 | Laser dust sensor |
| CN105486620A (en) * | 2016-02-02 | 2016-04-13 | 广东美的制冷设备有限公司 | Air purifier, laser dust concentration sensor and detection method thereof |
| CN205538639U (en) * | 2016-03-30 | 2016-08-31 | 林康 | Gas analysis appearance air chamber device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098281A (en) * | 2020-08-12 | 2020-12-18 | 深圳市汇投智控科技有限公司 | Laser dust sensor |
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Application publication date: 20170620 |
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