CN106990016A - A kind of dust sensor - Google Patents
A kind of dust sensor Download PDFInfo
- Publication number
- CN106990016A CN106990016A CN201710265097.2A CN201710265097A CN106990016A CN 106990016 A CN106990016 A CN 106990016A CN 201710265097 A CN201710265097 A CN 201710265097A CN 106990016 A CN106990016 A CN 106990016A
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- CN
- China
- Prior art keywords
- dust
- cavity
- box body
- fresh air
- air inlet
- Prior art date
- 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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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- 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
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0612—Optical scan of the deposits
Abstract
The invention discloses a kind of dust sensor, belong to air detection technical field.It includes upper lid, box body, also include dividing plate, blower fan, laser dust corpuscular counter, dust electrometer treasure, the dividing plate is located in the middle part of box body, box body is divided into counting cavity and weight calculation cavity, multiple fresh air inlets are offered on box body, part fresh air inlet, which is located at, to be counted in cavity, another part fresh air inlet is located in weight calculation cavity, laser dust corpuscular counter is provided with the counting cavity, blower fan is provided between laser dust corpuscular counter and fresh air inlet, dust electrometer treasure is provided with the weight calculation cavity, blower fan is provided between dust electrometer treasure and fresh air inlet.The quantity of dust in air particle and the volume of single particle are detected by laser dust corpuscular counter, the average weight of various powder dust particles in air is detected by dust electrometer treasure, excavating the inherent correlation between Various types of data for next step provides hardware foundation.
Description
Technical field
The present invention relates to a kind of dust sensor, belong to air detection technical field.
Background technology
Haze weather is happened occasionally, and air quality is increasingly paid close attention to by people, inhalable especially in air
Grain thing, either outdoor or indoor, people want to understand content, the composition of dust in air, and each composition is to human body
Harm.At present, for the detection of dust particle, more accurately data are all that authoritative institution is gone out by the apparatus measures of specialty
Come, people can not understand air pollution situation anywhere or anytime, this be due to specialty measuring instrument costly.At present
In the market also sells hand-held laser dust counter, but it can only measure the number of particles in general air in unit volume
And volume, data only have reference value, it is impossible to further appreciate that particle components.
The content of the invention
The technical problems to be solved by the invention are：A kind of dust sensor is provided, it solves current air detection
The problem of instrument is relatively simple to the Data Detection of dust.
The technical problems to be solved by the invention take following technical scheme to realize：
A kind of dust sensor, it includes upper lid, box body, and upper lid is sealed with box body and fixed, and forms cavity, in addition to dividing plate, wind
Machine, laser dust corpuscular counter, dust electrometer treasure, the dividing plate are located in the middle part of box body, and it is empty that box body is divided into counting
Multiple fresh air inlets are offered on chamber and weight calculation cavity, box body, part fresh air inlet, which is located at, to be counted in cavity, another part air intake hole position
In in weight calculation cavity, laser dust corpuscular counter is provided with the counting cavity, in laser dust corpuscular counter and air intake
It is provided between hole in blower fan, the weight calculation cavity and is provided with dust electrometer treasure, between dust electrometer treasure and fresh air inlet
Provided with blower fan.
As preferred embodiment, the upper lid, box body use plastic material, between the two provided with sealing ring, will by screw
Upper lid, sealing ring, box body three sealing are fixed.
The beneficial effects of the invention are as follows：The quantity and list of dust in air particle are detected by laser dust corpuscular counter
The volume of individual particle, the average weight of various powder dust particles in air is detected by dust electrometer treasure, can be simultaneously to sky
The quantity of powder dust particle, volume, weight data are collected in gas, are the inherent correlation between next step excavation Various types of data
Hardware foundation is provided.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structure principle chart of laser dust corpuscular counter；
Fig. 3 is the structure principle chart of dust electrometer treasure.
In figure：Box body 1, dividing plate 2, blower fan 3, laser dust corpuscular counter 4, dust electrometer treasure 5 counts cavity 6,
Count weight cavity 7, fresh air inlet 8, light source 41, lens 42, single seam shadow shield 43, light collecting lens 44, photodetector 45, ion generator
51, anode dust piece 52, pedestal 53, depression bar 54, force sensing resistance 55, cleaning device 56.
Embodiment
In order to which technological means, creation characteristic, reached purpose and effect to the present invention are easy to understand, with reference to tool
Body is illustrated, and the present invention is expanded on further.
As shown in Figure 1-Figure 3, a kind of dust sensor, it includes upper lid（It is not drawn into figure）, box body 1, it is upper lid with box body 1
Sealing is fixed, and forms cavity, in addition to dividing plate 2, blower fan 3, laser dust corpuscular counter 4, dust electrometer treasure 5, dividing plate 2
The middle part of box body 1 is located at, box body 1 is divided on counting cavity 6 and weight calculation cavity 7, box body 1 and offers multiple fresh air inlets 8, part
Fresh air inlet 8, which is located at, to be counted in cavity 6, and another part fresh air inlet 8 is located in weight calculation cavity 7, counts and laser dust is provided with cavity 6
Corpuscular counter 4, is provided with blower fan 3, weight calculation cavity 7 between laser dust corpuscular counter 4 and fresh air inlet 8 provided with dust electricity
Sub- weighing machine 5, is provided with blower fan 3 between dust electrometer treasure 5 and fresh air inlet 8.
Upper lid, box body 1 use plastic material, between the two provided with sealing ring, by screw by upper lid, sealing ring（In figure
It is not drawn into）, the three of box body 1 sealing fix.
At present, the laser dust corpuscular counter 4 that in the market is sold, its structure is as follows：Laser dust corpuscular counter 4
Constituted including light source 41, lens 42, single seam shadow shield 43, light collecting lens 44, photodetector 45, light source 41, lens 42, single seam hide
Tabula rasa 43 sets and point-blank forms a branch of parallel incident ray, and light collecting lens 44, photodetector 45 are arranged on and entered
Penetrate on light another straight line in 90 °, light source 41 pools parallel laser by lens 42, after single seam shadow shield 43,
It is radiated on powder dust particle and forms scattering, partial dispersion light is pooled in photodetector 45 by light collecting lens 44.
The operation principle of laser dust corpuscular counter 4：The general principle of laser dust corpuscular counter 4 is optical sensor
Exploring laser light scattered through dust particle after received by light-sensitive element and produce pulse signal, the pulse signal is output and put
Greatly, Digital Signal Processing is then carried out, by being compared with standard particle signal, comparing result is represented with different parameters
Out.Particulate in air can be scattered under the irradiation of light, and this phenomenon is light scattering.Light scattering and particle size, light
Ripple wavelength, particulate refractive index and particulate are relevant to factors such as the absorption characteristics of light.But with regard to scattered light intensity and particle size
Speech, there is a basic law, be exactly the intensity of Particle Scattering light increases and increased with the surface area of particulate.Dissipated as long as so determining
The size of particulate can be deduced by penetrating the intensity of light, in fact, the scattered light intensity that each particle is produced is very weak, it is a very little
Light pulse, it is necessary to by the amplification of optical-electrical converter, be converted into the larger electric pulse of signal amplitude, Ran Houzai by light pulse
By the further amplification and examination of electronic circuit, so as to complete the Counts to a large amount of electric pulses.Now, electric pulse quantity
Corresponding to the number of particulate, the amplitude of electric pulse corresponds to the size of particulate.Here it is light scattering formula laser dust particle counting
The general principle of device 4.And general measure is the number of particles in unit volume and the volume of each particle.
Dust electrometer treasure 5 includes anion generator 51, anode dust piece 52, pedestal 53, depression bar 54, force sensing resistance
55th, cleaning device 56, anode dust piece 52 is arranged on the side of anion generator 51, and anode dust piece 52 is lived by depression bar 54
On the base 53, force sensing resistance 55 is fixed on the base 53, positioned at the lower section of depression bar 54, is contacted with depression bar 54, the quick electricity of power for dynamic fixation
55 two ends detection circuit for access are hindered, the dust in air is blowed to anion generator 51 by blower fan 3, and dust ion passes through anion
Negative electricity is taken during generator 51, electronegative dust ion is adsorbed by the anode dust piece 52 of positively charged, now, in Action of Gravity Field
Under, depression bar 54 produces pressure to force sensing resistance 55, and the resistance value of force sensing resistance 55 changes, and detection circuit is according to resistance value
Change, by the piezoelectric property curve ratio with force sensing resistance 55 compared with, converse the weight of the particle adsorbed on anode dust piece 52,
The air quantity conversion of anion generator 51 is blown into blower fan 3 again, is drawn in unit volume, the average weight of the particle contained in air
Amount.Complete after one-time detection, the particle that cleaning device 56 will be removed on anode dust piece 52, to detect next time.Sanitizer cartridge
Put 56 and use high pressure nozzle cleaning device, the gases at high pressure that it sprays enable to particle to be come off from anode dust piece 52.
Thus, obtained number of particles in unit volume, the volume distributed median of particle, in unit volume particle average weight
Amount, these three extremely important and related data.For example, more heavy metal particles should not be contained in normal air, once
When containing more heavy metal particles in air, the average weight of particle will be above the average weight of normal air in unit volume
Numerical value, in conjunction with the volume distributed median of particle, the averag density of preresearch estimates particle, when averag density is substantially inclined to heavy metal density
When, it can determine substantially containing compared with multi-metal.Compared to general relatively simple measuring instrument, this sensor can be obtained more
The data of particle in many air, by Various types of data comprehensive analysis, can more accurately judge containing composition.
The quantity of dust in air particle and the volume of single particle are detected by laser dust corpuscular counter 4, is passed through
The average weight of various powder dust particles in the detection air of dust electrometer treasure 5, can be while to the number of dust in air particle
Amount, volume, weight data are collected, and excavating the inherent correlation between Various types of data for next step provides hardware foundation.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, without departing from the spirit and scope of the present invention, this hair
Bright also to have various changes and modifications, these changes and improvements are both fallen within the scope of protection of present invention.Application claims
Protection domain is by appended claims and its equivalent thereof.
Claims (2)
1. a kind of dust sensor, it includes upper lid, box body, and upper lid is sealed with box body and fixed, and forms cavity, it is characterised in that：
Also include dividing plate, blower fan, laser dust corpuscular counter, dust electrometer treasure, the dividing plate is located in the middle part of box body, by box body
It is divided on counting cavity and weight calculation cavity, box body and offers multiple fresh air inlets, part fresh air inlet, which is located at, is counted in cavity, another
Part fresh air inlet is located in weight calculation cavity, laser dust corpuscular counter is provided with the counting cavity, in laser dust particle
It is provided between counter and fresh air inlet in blower fan, the weight calculation cavity and is provided with dust electrometer treasure, in dust electrometer treasure
Blower fan is provided between fresh air inlet.
2. a kind of dust sensor according to claim 1, it is characterised in that：The upper lid, box body use plastic material, two
Sealing ring is provided between person, upper lid, sealing ring, box body three sealing is fixed by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265097.2A CN106990016A (en) | 2017-04-21 | 2017-04-21 | A kind of dust sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265097.2A CN106990016A (en) | 2017-04-21 | 2017-04-21 | A kind of dust sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106990016A true CN106990016A (en) | 2017-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710265097.2A Pending CN106990016A (en) | 2017-04-21 | 2017-04-21 | A kind of dust sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN106990016A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181215A (en) * | 2017-12-18 | 2018-06-19 | 广东美的制冷设备有限公司 | For the method for the remote controler and detection particle concentration of air cleaning facility |
| CN109580490A (en) * | 2018-11-06 | 2019-04-05 | 珠海格力电器股份有限公司 | Detection of Air Quality method, system, detection device and readable storage medium storing program for executing |
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Application publication date: 20170728 |
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