CN106979914A - Dust concentration sensor based on light scattering principle - Google Patents
Dust concentration sensor based on light scattering principle Download PDFInfo
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- CN106979914A CN106979914A CN201710251566.5A CN201710251566A CN106979914A CN 106979914 A CN106979914 A CN 106979914A CN 201710251566 A CN201710251566 A CN 201710251566A CN 106979914 A CN106979914 A CN 106979914A
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- circuit board
- entry
- sensitive device
- gas port
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- 239000000428 dust Substances 0.000 title claims abstract description 30
- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 23
- 239000004065 semiconductor Substances 0.000 claims abstract description 38
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000746 purification 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 invention provides a dust concentration sensor based on a light scattering principle, which comprises: the fan module, the circuit board, the semiconductor light-emitting module and the photosensitive device are arranged in the cavity; an airflow channel is formed in the base, the upper cover is provided with a first air inlet/outlet and a second air inlet/outlet which are communicated, the fan module is arranged on the upper side of the circuit board and is opposite to the first air inlet/outlet, the semiconductor light-emitting module and the photosensitive device are arranged on the bottom side of the circuit board, the output of the photosensitive device is connected to the circuit board, and the circuit board is provided with a data output interface; the airflow channel is communicated with the first air inlet/outlet and the second air inlet/outlet. The invention avoids the influence of the air flow inside the purifying equipment or the purified air flow during air sampling, and improves the anti-interference capability and the working stability of the sensor.
Description
Technical field
The present invention relates to sensor application technical field, especially a kind of sensor of dust concentration based on light scattering.
Background technology
Requirement with people to air cleaning facility performance is constantly improved, and cleaning equipment is to its intelligent control precision
It is required that also more and more higher, thus miscellaneous dust sensor also arises at the historic moment.But existing dust concentration is passed on the market
Arrangement, the design of air flue and the design of interlock circuit of the air sampling import and export position of sensor all do not fully take into account sky
The behaviour in service of the special occasions such as gas cleaning equipment, the antijamming capability that result in sensor is weak, it is impossible to accurately reflects purification and sets
The drawback such as standby true clean-up effect and sensor response time length.
The content of the invention
The problem of for mentioned in background technology, the present invention proposes a kind of dust concentration sensing based on light scattering principle
Device, it is to avoid influenceed during air sampling by cleaning equipment internal gas flow or cleaned air-flow, improve the anti-interference of sensor
Ability and job stability, its particular technique content are as follows：
A kind of sensor of dust concentration based on light scattering principle, it includes：Upper lid, base, fan module, circuit board, partly lead
Body illuminating module and light-sensitive device, the accommodating fan module, circuit board, semiconductor are formed with after the upper lid and bottom seat combination
The inner chamber of illuminating module and light-sensitive device；Gas channel, upper first entry/exit of the lid with insertion are formed with the base
Gas port and the second entry/exit gas port, the fan module is located at the upside of circuit board and, institute relative with the first entry/exit gas port
State semiconductor light emitting module and light-sensitive device be located at circuit board bottom side, the output of the light-sensitive device is connected to the circuit board,
The circuit board has data output interface；The gas channel is communicated with the first entry/exit gas port, the second entry/exit gas port.
There is the air-flow window through plate body in one or more embodiments of the invention, on the circuit board, it is described
Gas channel is communicated via the air-flow window with the first entry/exit gas port of upper lid, and the circuit board is in the second entry/exit gas
Mouth and the relative place of gas channel have empty avoiding breach.
In one or more embodiments of the invention, the first entry/exit gas port and the second entry/exit gas port are positioned at described
The same table side of upper lid.
In one or more embodiments of the invention, the photosurface of the light-sensitive device and the semiconductor light emitting module
Light output direction into an angle of 90 degrees.
In one or more embodiments of the invention, the circuit board has pre-amplifying module, signal processing module
And data processing module, the signal of light-sensitive device feedback successively it is premenstrual put big, signal transacting and data processing after connect by data
Mouth output.
In one or more embodiments of the invention, the light-sensitive device is silicon photocell or photodiode.
In one or more embodiments of the invention, the luminescent device of the semiconductor light emitting module is semiconductor laser
Pipe or light emitting diode.
In one or more embodiments of the invention, the semiconductor light emitting module and light-sensitive device are fixedly arranged on electricity in the lump
Provided with the locating slot for coordinating the accommodating semiconductor light emitting module, the cell wall of the locating slot in the bottom side of road plate, the base
The upper light for allowing the semiconductor light emitting module to send with recess or perforation reaches gas channel, in the photosensitive of the light-sensitive device
Gas channel formation photosensitive area below face.
Under same design, the present invention also proposes a kind of sensor of dust concentration based on light scattering principle, with shell
And the main body being placed in one, the main body include upper lid, base, fan module, circuit board, semiconductor light emitting module and photosensor
Part, the accommodating fan module, circuit board, semiconductor light emitting module and light-sensitive device are formed with after the upper lid and bottom seat combination
Inner chamber；Gas channel, the upper first entry/exit gas port and second entry/exit gas of the lid with insertion are formed with the base
Mouthful, the fan module located at the upside of circuit board and relative with the first entry/exit gas port, the semiconductor light emitting module with
Light-sensitive device is located at circuit board bottom side, and the output of the light-sensitive device is connected to the circuit board, and the circuit board has data
Output interface；The gas channel is communicated with the first entry/exit gas port, the second entry/exit gas port；The light-sensitive device it is photosensitive
The light output direction of face and the semiconductor light emitting module is into an angle of 90 degrees, and the air-flow below the photosurface of the light-sensitive device leads to
Road formation photosensitive area.
In one or more embodiments of the invention, the housing includes upper casing and lower casing, the upper casing upper table mask
There are the first window relative to the first entry/exit gas port and second window relative with the second entry/exit gas port, it is described
Button hole is provided with the two side of upper casing, the two side of the lower casing is provided with the protuberance being engaged with the button hole of the upper casing
Block.
The beneficial effects of the invention are as follows：Fan is taken to enter（Go out）Wind face and gas channel go out（Enter）Mouth is in sensor
The design of same table side, it is to avoid influenceed during air sampling by cleaning equipment internal gas flow or cleaned air-flow, improve biography
The antijamming capability and job stability of sensor.Also so that under equal conditions, can select the fan of more Wind Volume so that tested
Air can flow through photosensitive area more quickly, the dust granules entrained by this air-flow, the light beam sent by luminescence unit
Irradiation, produces MIE scatterings and is perceived by photosensitive unit, after interlock circuit and onboard microprocessor processes, obtain air-borne dust
The particle diameter and concentration of particle.
Brief description of the drawings
Fig. 1 is the overall structure figure of the sensor of dust concentration based on light scattering principle of the present invention.
Fig. 2 is the detonation configuration figure one of the sensor of dust concentration based on light scattering principle of the present invention.
Fig. 3 is the detonation configuration figure two of the sensor of dust concentration based on light scattering principle of the present invention.
Fig. 4 is the plinth air flow access diagram of the sensor of dust concentration based on light scattering principle of the present invention.
Fig. 5 is the workflow diagram of the sensor of dust concentration based on light scattering principle of the present invention.
Embodiment
Below in conjunction with accompanying drawing, application scheme is further described：
Referring to accompanying drawing 1 to 4, a kind of sensor of dust concentration based on light scattering principle, including main body 1, the main body 1 it include
Upper lid 11, base 12, fan module 2, circuit board 3, semiconductor light emitting module 4 and light-sensitive device 5, the upper lid 11 and base 12
The inner chamber of the accommodating fan module 2, circuit board 3, semiconductor light emitting module 4 and light-sensitive device 5 is formed with after combination；The bottom
Gas channel 121 is formed with seat 12, the upper lid 11 has the first entry/exit gas port 111 and the second entry/exit gas port of insertion
112, the fan module 2 is located at the upside of circuit board 3 and relative with the first entry/exit gas port 111, the semiconductor light emitting
Module 4 and light-sensitive device 5 are located at the bottom side of circuit board 3, and the output of the light-sensitive device 5 is connected to the circuit board 3, the circuit
Plate 3 has data output interface 31；The gas channel 121 and the first entry/exit gas port 111, the second entry/exit gas port 112
Communicate；Also include the shell 6 for housing the main body 1, the shell 6 is metal shielding box, and it includes upper casing 61 and lower casing 62, institute
State the upper surface of upper casing 61 have the first window 611 relative to the first entry/exit gas port 111 and with the second entry/exit gas
It is provided with 112 the second relative windows 612 of mouth, the two side of the upper casing 61 on button hole 613, the two side of the lower casing 62
The bump 621 being engaged provided with the button hole 613 with the upper casing 61.
There is the air-flow window 30 through plate body, the gas channel 121 is via the air-flow window on the circuit board 3
30 communicate with the first entry/exit gas port 111 of upper lid 11, and the circuit board 3 is in the second entry/exit gas port 112 and gas channel
121 relative places have empty avoiding breach 32.
The first entry/exit gas port 111 and the second entry/exit gas port 112 are located at the same table side of the upper lid 11.
The light output direction of the photosurface of the light-sensitive device 5 and the semiconductor light emitting module 4 is into an angle of 90 degrees；Specifically
, the semiconductor light emitting module 4 and light-sensitive device 5 are fixedly arranged in the bottom side of circuit board 3, the base 12 provided with cooperation in the lump
The locating slot 122 of the semiconductor light emitting module 4 is housed, there is on the cell wall of the locating slot 122 recess or perforation 123 to allow institute
The light arrival gas channel 121 that semiconductor light emitting module 4 is sent is stated, the air-flow below the photosurface of the light-sensitive device 5 leads to
The formation photosensitive area of road 121.
The light-sensitive device 5 is silicon photocell or photodiode, and the luminescent device of the semiconductor light emitting module 4 is
Semiconductor laser tube or light emitting diode, its isolychn can be infrared, visible and ultraviolet light；The semiconductor light emitting module 4
Condenser lens containing one or many.
There is the opening 120 of the data-interface 31 of the correspondence circuit board 3, the two ends of the base 12 on the base 12
A pair of mounting ears 124 are symmetrically arranged with, the table side of the upper casing 61 is further opened with the corresponding data-interface 31 for exposing circuit board 3
Connecting has the first clearance position 622 passed for the mounting ear 124 on window 614, the lower casing 62, and the correspondence bottom
First clearance position 623 of the opening 120 of seat 12.
Referring to accompanying drawing 5, the circuit board 3 has pre-amplifying module, signal processing module and data processing module, photosensitive
The signal of device feedback successively it is premenstrual put big, signal transacting and data processing after exported by data-interface 31.
The present invention action principle be：Dust granules enter sensor gas circuit by fan first, during by photosensitive area,
The light beam that semiconductor luminous assembly is sent is so that dust granules are produced and light beam Mie scattered lights in 90 °, the light of forward direction
Due to being interference light, carry out eliminating design, the light-sensitive device being on 90 ° of directions with light beam will receive corresponding MIE
Scattered light signal, amplifies again after being changed by IV, is handled afterwards in signal feeding single-chip microcomputer, passes through corresponding algorithm meter
Calculate the concentration value of different-grain diameter dust granules in air.
It is that above-mentioned preferred embodiment should be regarded as application scheme embodiment for example, all with application scheme thunder
Deduce, replace with, technology that is approximate or making based on this, improving etc., it is regarded as the protection domain of this patent.
Claims (10)
1. a kind of sensor of dust concentration based on light scattering principle, it is characterised in that including：Upper lid, base, fan module,
Circuit board, semiconductor light emitting module and light-sensitive device, the accommodating fan module, electricity are formed with after the upper lid and bottom seat combination
The inner chamber of road plate, semiconductor light emitting module and light-sensitive device；Gas channel is formed with the base, the upper lid has insertion
The first entry/exit gas port and the second entry/exit gas port, the fan module located at circuit board upside and with first entry/exit
Gas port is relative, and the semiconductor light emitting module and light-sensitive device are located at circuit board bottom side, and the output of the light-sensitive device is connected to
The circuit board, the circuit board has data output interface；The gas channel and the first entry/exit gas port, second enter/
Gas outlet is communicated.
2. the sensor of dust concentration according to claim 1 based on light scattering principle, it is characterised in that：The circuit board
The upper air-flow window with through plate body, the gas channel via the air-flow window and upper lid the first entry/exit gas port phase
Logical, the circuit board has empty avoiding breach in the second entry/exit gas port and the relative place of gas channel.
3. the sensor of dust concentration according to claim 1 based on light scattering principle, it is characterised in that：Described first
Entry/exit gas port and the second entry/exit gas port are located at the same table side of the upper lid.
4. the sensor of dust concentration based on light scattering principle according to claim 1 or 2 or 3, it is characterised in that：It is described
The light output direction of the photosurface of light-sensitive device and the semiconductor light emitting module is into an angle of 90 degrees.
5. the sensor of dust concentration according to claim 4 based on light scattering principle, it is characterised in that：The circuit board
With pre-amplifying module, signal processing module and data processing module, the signal of light-sensitive device feedback successively it is premenstrual put it is big,
Exported after signal transacting and data processing by data-interface.
6. the sensor of dust concentration according to claim 4 based on light scattering principle, it is characterised in that：The photosensor
Part is silicon photocell or photodiode.
7. the sensor of dust concentration according to claim 4 based on light scattering principle, it is characterised in that：The semiconductor
The luminescent device of illuminating module is semiconductor laser tube or light emitting diode.
8. the sensor of dust concentration according to claim 4 based on light scattering principle, it is characterised in that：The semiconductor
Illuminating module and light-sensitive device are fixedly arranged in the bottom side of circuit board, the base in the lump houses the semiconductor light emitting provided with cooperation
The light that there is recess or perforation to allow the semiconductor light emitting module to send on the locating slot of module, the cell wall of the locating slot is reached
Gas channel, the gas channel formation photosensitive area below the photosurface of the light-sensitive device.
9. a kind of sensor of dust concentration based on light scattering principle, it is characterised in that：With shell and the main body being placed in one,
The main body includes upper lid, base, fan module, circuit board, semiconductor light emitting module and light-sensitive device, the upper lid and bottom seat
The inner chamber of the accommodating fan module, circuit board, semiconductor light emitting module and light-sensitive device is formed with after combination；In the base
Gas channel is formed with, the upper first entry/exit gas port and second entry/exit gas port of the lid with insertion, the fan module are set
In the upside of circuit board and relative with the first entry/exit gas port, the semiconductor light emitting module and light-sensitive device are located at circuit
Plate bottom side, the output of the light-sensitive device is connected to the circuit board, and the circuit board has data output interface；The air-flow
Passage is communicated with the first entry/exit gas port, the second entry/exit gas port；The photosurface of the light-sensitive device is sent out with the semiconductor
The light output direction of optical mode group is into an angle of 90 degrees, the gas channel formation photosensitive area below the photosurface of the light-sensitive device.
10. the sensor of dust concentration according to claim 9 based on light scattering principle, it is characterised in that：The housing
Including upper casing and lower casing, the upper casing upper surface has the first window relative to the first entry/exit gas port and with described the
Button hole is provided with the second relative window of two entry/exit gas ports, the two side of the upper casing, the two side of the lower casing is provided with
The bump being engaged with the button hole of the upper casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251566.5A CN106979914A (en) | 2017-04-18 | 2017-04-18 | Dust concentration sensor based on light scattering principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251566.5A CN106979914A (en) | 2017-04-18 | 2017-04-18 | Dust concentration sensor based on light scattering principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106979914A true CN106979914A (en) | 2017-07-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710251566.5A Pending CN106979914A (en) | 2017-04-18 | 2017-04-18 | Dust concentration sensor based on light scattering principle |
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| Country | Link |
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| CN (1) | CN106979914A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655802A (en) * | 2017-10-17 | 2018-02-02 | 电子科技大学中山学院 | Optical principle dust sensor with function of preventing dust from entering |
| CN109580442A (en) * | 2019-01-10 | 2019-04-05 | 中煤科工集团重庆研究院有限公司 | Maintenance-free laser dust concentration sensor |
| CN109765158A (en) * | 2019-03-13 | 2019-05-17 | 陈美香 | A kind of light scattering formula dust detector and regulating device |
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2017
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655802A (en) * | 2017-10-17 | 2018-02-02 | 电子科技大学中山学院 | Optical principle dust sensor with function of preventing dust from entering |
| CN109580442A (en) * | 2019-01-10 | 2019-04-05 | 中煤科工集团重庆研究院有限公司 | Maintenance-free laser dust concentration sensor |
| CN109765158A (en) * | 2019-03-13 | 2019-05-17 | 陈美香 | A kind of light scattering formula dust detector and regulating device |
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