CN205719880U - Concentration of dust detection device - Google Patents
Concentration of dust detection device Download PDFInfo
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- CN205719880U CN205719880U CN201620346222.3U CN201620346222U CN205719880U CN 205719880 U CN205719880 U CN 205719880U CN 201620346222 U CN201620346222 U CN 201620346222U CN 205719880 U CN205719880 U CN 205719880U
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Abstract
This utility model relates to a kind of concentration of dust detection device.Concentration of dust detection device can include field generator, for producing electric field in gas to be measured with by described gas ionization to be measured；Electric signal measurement module, is connected to described field generator, the change of the signal of telecommunication in the loop measuring described electric field place；And processor, receive the described signal of telecommunication, for analyzing the change of the signal of telecommunication, thus obtain the mass concentration value of dust in gas to be measured.
Description
Technical field
This utility model belongs to Detection of Air Quality technical field, relates more specifically to a kind of concentration of dust detection device.
Background technology
Concentration of dust in concentration of dust detection mainly detection surrounding air.Air pollution, is also called atmospheric pollution, presses
According to the definition of International Organization for Standardization (ISO), air pollution typically refers to owing to mankind's activity or natural process cause some thing
Matter enters in air, presents enough concentration, reaches time enough, and therefore compromise the comfortable, healthy of the mankind and good fortune
Profit or the phenomenon of environment.
PM2.5 is suspended in the diameter particulate matter less than 2.5 microns in air.Compared with thicker Atmospheric particulates,
PM2.5 particle diameter is little, and area is big, and activity is strong, the most incidentally poisonous and harmful substances, such as heavy metal, microorganism etc., and in an atmosphere
Time of staying length, fed distance remote, thus the impact on atmosphere quality is particularly evident.
The adhesive force of PM2.5 is very strong, and the physiological structure of human body does not has any filtration, obstruction ability to PM2.5, too high
The respiratory system of human body, cardiovascular system, reproductive system and blood system can be caused serious harm by PM2.5 concentration.Realize
Accurate, real-time, the easy detection of PM2.5 concentration, to remind the daily outdoor activity of the common people, is the people's livelihood work being significant
Make.
Summary of the invention
The dust hazard conditions to workers ' health in order to understand, in the air of evaluating operation place, research improves dust control technology
Measure and the effect of evaluation dust prevention.It is required for concentration of dust is measured.The method for expressing of concentration of dust has quality
Mensuration two kinds of method sum.Quality concentration of dust is the quality of dust in unit volumes of air, with mg/m3Represent.Quantity dust is dense
The method for expressing of degree is dust granules number in unit volumes of air, with n/m3Represent.
Before the sixties, the dust maximum permissible concentration of a lot of countries uses number concentration to represent, only China, the Soviet Union etc.
State uses mass concentration to represent.Later, because it is found that the progress of anthraco-silicosis is closely related with the mass concentration of suspended dust, 70 years
Dai Hou, English, U.S., Deng state enter number concentration and mass concentration and with the stage, and various countries are gradually to mass concentration development.Quantity
Concentration of dust is easier to record and the mensuration of quality concentration of dust is relatively difficult to achieve.
This application provides a kind of concentration of dust detection device, it is possible to measure the mass concentration value of dust in gas to be measured.
According to one side of the present utility model, it is provided that a kind of concentration of dust detection device, including field generator, it is used for
Electric field is produced with by described gas ionization to be measured in gas to be measured；Electric signal measurement module, is connected to described electric field and occurs
Device, the change of the signal of telecommunication in the loop measuring described electric field place；And processor, receive the described signal of telecommunication, for dividing
The change of the analysis signal of telecommunication, thus obtain the mass concentration value of dust in gas to be measured.
In one embodiment, this field generator includes high tension generator and the electricity being arranged in described gas to be measured
Pole, described electrode is connected with the two ends of high tension generator, and described field generator is used for discharging electronics.
In one embodiment, at least one during this signal of telecommunication includes electric current, voltage and electric capacity.
In one embodiment, this electric signal measurement module includes the resistance being connected in this loop.
In one embodiment, this field generator also include following at least one: filtration module, for described telecommunications
Number it is filtered filtering off the noise signal in the described signal of telecommunication；Amplification module, for amplifying the change of the described signal of telecommunication；A/D
Modular converter, for the described signal of telecommunication is converted into digital signal from analogue signal, wherein, described processor is to described numeral letter
Number it is analyzed.
In one embodiment, this field generator includes electrode spaced a predetermined distance, and the spacing of electrode is scalable
's.
In one embodiment, this concentration of dust detection device, it is additionally provided with filter course, is used for filtering described gas to be measured
The particulate matter of middle predetermined diameter scope.
In one embodiment, this concentration of dust detection device, it is additionally provided with insulating barrier and/or screen layer, this insulating barrier
For being insulated with the external world by described electric field, this screen layer is for shielding described electric field relative to the external world.
In one embodiment, this filter course is configured to the particulate matter filtering diameter more than 2.5 microns.
In one embodiment, this concentration of dust detection device, also include wireless communication module, this wireless communication module connects
Receive the mass concentration signal that drawn by described processor analysis, and this mass concentration signal is sent to long-range server or just
Take formula mobile client.
Detect device according to concentration of dust of the present utility model, can automatically gather and directly measure dust mass concentration, dress
Put that miniaturization is low in energy consumption, light weight is portable, more low cost, can be at civilian or commercial kitchen area use of large-scale production.
Accompanying drawing explanation
By feature and advantage of the present utility model can be more clearly understood from reference to accompanying drawing, accompanying drawing be schematic and not
It is interpreted as this utility model is carried out any restriction, in the accompanying drawings:
Fig. 1 illustrates the structured flowchart of an embodiment according to concentration of dust of the present utility model detection device；
Fig. 2 illustrates the flow chart of an embodiment according to concentration of dust detection method of the present utility model；
Fig. 3 illustrates the structural representation of an embodiment according to concentration of dust of the present utility model detection device；
Fig. 4 illustrates the signal of an embodiment according to charged particle of the present utility model movement locus in the electric field
Figure；
Fig. 5 illustrates the structure diagram of an embodiment according to field generator of the present utility model.
Detailed description of the invention
Feature and the exemplary embodiment of of the present utility model various aspects are described more fully below.Retouch in detail following
In stating, it is proposed that many details, in order to provide comprehensive understanding of the present utility model.But, for people in the art
It will be apparent that this utility model can be implemented in the case of some details in need not these details for Yuan.
Description to embodiment below be only used to by illustrate example of the present utility model provide to of the present utility model more preferably
Understanding.This utility model is never limited to any concrete configuration set forth below and method, but new without departing from this practicality
Cover any amendment of element, parts and algorithm on the premise of the spirit of type, replace and improve.In accompanying drawing and explained below
In, it is shown without known structure and technology, in order to avoid this utility model causes unnecessary obscuring.
Below in conjunction with the accompanying drawings, describe the concentration of dust according to this utility model embodiment in detail and detect device and concentration of dust
Detection method.
Fig. 1 shows according to a kind of embodiment, the structured flowchart of concentration of dust detection device.According to this embodiment, a kind of
Concentration of dust detection device can include field generator 110, for producing electric field in gas to be measured；Electric signal measurement module
120, it is connected to this field generator 110, the change of the signal of telecommunication in the loop measuring this electric field place；And processor
130, it is connected to this electric signal measurement module 120, for analyzing the change of the signal of telecommunication, thus obtains the matter of dust in gas to be measured
Amount concentration value.In one embodiment, field generator can be powered by 12V D/C power.
A kind of embodiment shown in Fig. 2, the flow chart of concentration of dust detection method.As in figure 2 it is shown, in step s201,
Gas to be measured produces electric field with by this gas ionization to be measured.In s202, measure the signal of telecommunication in the loop at electric field place
Change.At s203, analyze the change of the signal of telecommunication to obtain the mass concentration value of dust in gas to be measured.In one example,
The signal of telecommunication measured can be curtage.
In one embodiment, electric field can be produced by the electrode being connected with high tension generator, and high tension generator is by height
Pressure output is to electrode two ends, it is contemplated that safety can also arrange overvoltage protection and overcurrent protection electricity in high tension generator
Road.Electrode can use the materials such as carbon fiber, graphite, metal.In this application, " high pressure " refer to be enough to make gas to be measured from
The voltage of sonization (such as, gas ionization to be measured is produced a large amount of electronics), such as, can be 50V to 10, the electricity between 000V
Pressure.
In one embodiment, the method also includes the granule that gas to be measured filters to filter off predetermined diameter scope
Thing, such as, can filter off the diameter particulate matter more than 2.5 microns from gas to be measured, dense in order to detect the quality of such as PM2.5
Degree.
In one embodiment, signal can also be filtered by the step of the changing value measuring the signal of telecommunication in electric field loop
Ripple, crosses noise filtering, reduces noise jamming.For example with low-pass filtering, reject High-frequency Interference.According to noise level, it is also possible to no
Filter.
In one embodiment, the step of the changing value measuring the signal of telecommunication in electric field loop includes can be by the loop signal of telecommunication
Amplify, such as, can use bias pressure amplifying circuit, remove and affect without the raw electrical signal in measuring circuit in the case of dust,
Amplify the change in electric that dust mass concentration causes.
In one embodiment, the step of the changing value measuring the signal of telecommunication in electric field loop includes can be by the loop signal of telecommunication
Carry out A/D conversion.
In one embodiment, this loop includes being connected on resistance therein, measures the voltage at resistance two ends or by being somebody's turn to do
The electric current of resistance, is calculated the mass concentration of dust in air.
There is following functional relationship in the signal of telecommunication in loop and dust granules concentration value:
When there is not molecule, the quantity of electric charge Q at electrode two endsElectricityWith electric current ISurveyExpression formula be:
When there is molecule, electric current and voltage by resistance can be expressed as:
Wherein, QElectricityThe quantity of electric charge for electrode two ends；USurveyVoltage for resistance two ends；RSurveyFor series connection resistance in the loop
Value；U is electrode both end voltage；K is the empirical set, and can be set according to measured data；D is electrode distance；S is electricity
The area at two ends, pole；ε0For vacuum absolute dielectric constant；εElectricityChange for relative dielectric constant；Change for relative dielectric constant
Rate；ρ is gas density to be measured, and by atmospheric density table, can determine that Current standards air in conjunction with current gas pressure and temperature
Density value, can use gas density to be measured to deduct Current standards atmospheric density and draw the mass concentration of dust granules thing to be measured.
Fig. 3 shows according to a kind of embodiment, the signal of an embodiment of charged particle movement locus in the electric field
Figure.Fig. 4 shows according to a kind of embodiment, the structural representation of concentration of dust detection device.As shown in Figure 3 and Figure 4: electric field is sent out
Raw device includes high tension generator 301 and electrode, and this electrode is connected with high tension generator 301, and this field generator is for be measured
Gas discharges electronics, it is possible to discharging a large amount of electronics, a large amount of electronics to positive polar motion, can make described electricity from the negative pole of electrode
Field generator and electrode form the loop of a Guan Bi.The voltage range that this high tension generator 301 produces is for example, it can be set to be
50V-10000V.In one embodiment, high tension generator 301 can produce the negative voltage that size is 3800v.By closing back
Road, electronics will migrate to the electrode other end under electric field action.In transition process, electrons adsorbs aerial dust granules
On thing, so that the dust granules thing in air becomes charged particle, and migrate under the active force of electric field, cause
Electron transfer processes extra work, electron transfer increases the electric energy spent by dust granules migration, and contrast is without dust particulate matter feelings
Under condition, there is the situation of dust granules thing that dust granules thing can be caused to migrate the electric energy increased spent by electron transfer, and cause back
The change of the signal of telecommunication in road.This signal of telecommunication can include at least one in electric current, voltage and electric capacity.In gas the most to be measured
Dust mass concentration rising can cause current value in loop to reduce.
In one embodiment, this high voltage electric field can arrange two pole plates, and the gas to be measured between pole plate and pole plate is altogether
With defining an electric capacity, the change of the gas dust granules thing to be measured in this electric capacity can cause the change of the dielectric constant of this electric capacity
Change, by measuring capacitance, in conjunction with dielectric constant and gas concentration relation to be measured, can analyze that to obtain dust granules material amount dense
Degree.
In one embodiment, this electric signal measurement module 302 includes the resistance being connected in this loop, by this resistance
Loop current change can be converted to direct measurable change in voltage.By measuring the electric current of this resistance or resistance two ends
Voltage can calculate the density of gas to be measured, and then obtains the corresponding mass concentration of dust granules in gas to be measured.Close back
Road electric current declines, and the size of dust granules thing mass concentration affects loop current.By measuring loop current on closed-loop path
Change, thus obtain dust particle amount concentration value in air.Resistance value can be different according to the scope of voltage of electric field, in one
In embodiment, high tension generator 301 can produce the negative voltage that size is 3800v, and the resistance of precision resistance can be chosen as 1M
Ω。
In one embodiment, electric signal measurement module 302 can also include amplification module 304, amplifies by concentration of dust
The change in electric that change causes, such as, can use bias pressure amplifying circuit, removes without electric signal measurement in the case of dust
Raw electrical signal impact in module 302 circuit, amplifies the change in electric that dust mass concentration causes, thus improves device
Sensitivity.In one embodiment, high tension generator 301 can produce the negative voltage that size is 3800v, the resistance of precision resistance
Can be chosen as 1M Ω, the amplification of amplification module 304 can be chosen as 50 times.
In one embodiment, electric signal measurement module 302 can also include A/D modular converter 305, such as analogue signal
Can sample through A/D modular converter 305 and be converted to digital signal, digital signal input is analyzed meter to processor 306
Calculate.
In one embodiment, electric signal measurement module 302 can also include filtration module 303, can be at amplification module
Filtration module 303 was set before 304, crosses noise filtering, reduce noise jamming.For example with low-pass filtering, reject High-frequency Interference.?
In a kind of embodiment, high tension generator 301 can produce the negative voltage that size is 3800v, and the resistance of precision resistance can select
For 1M Ω, the amplification of amplification module 304 can be chosen as 50 times, and the sampling mould signal sampling frequency of A/D converter is permissible
During for 100Hz, filtration module 303 may be selected that the low pass filter rejecting more than 100Hz High-frequency Interference.According to noise water
Flat, it is also possible to not filter.
In one embodiment, processor is for the voltage U at the resistance two ends by recordingSurveyIt is calculated by this resistance
Electric current ISurvey, and quantity of electric charge Q based on electrode two endsElectricity, electrode both end voltage U, electrode distance d, the area S at electrode two ends, very
Empty absolute dielectric constant ε0, relative dielectric constant change εElectricity, relative dielectric constant rate of changeIt is calculated gas to be measured
Density, thus obtain the mass concentration of the dust of gas to be measured.
It will be understood by those skilled in the art that processor can realize in the way of using software, hardware and/or firmware.
Such as, in one embodiment, processor can be realized by programmed instruction in messaging device, these programmed instruction
Can be stored in the nonvolatile memory of this messaging device, and by the one of this messaging device or many
Individual processor makes this messaging device realize corresponding amplification module 304, filtration module 303, A/D modular converter when performing
305 and computing module.These programmed instruction can be contained in and exist with forms such as source code, object code, intermediate codes
And can be with in compiling or the executable file of interpretive mode execution or APP.In another kind of embodiment, processor can be by firmly
Wired circuit realizes, and amplification module 304 therein, filtration module 303, A/D modular converter 305 and processor can be each other
Circuit that is discrete and that connect, it is also possible to integrate.
In one embodiment, this concentration of dust detection device can include testing circuit and processor 306, this detection electricity
Road can include that high tension generator 301, electric signal measurement module 302, filtration module 303, amplification module 304 and A/D are changed
Module 305, the signal that this signal measurement module 302 records module 303 after filtering, amplification module 304 and A/D modular converter
305 process, and the treated device of digital signal 306 after process is analyzed thus obtained the mass concentration of dust.
According to an embodiment, concentration of dust detection device, it is additionally provided with filter course, for filtering predetermined diameter scope
Particulate matter, can make concentration of dust detection device only check the concentration of the particulate matter of special diameter scope.
According to an embodiment, being additionally provided with insulating barrier and/or screen layer, this insulating barrier is for entering this electric field with the external world
Row insulation, this screen layer is for shielding this electric field with the external world.
Fig. 5 illustrates according to an embodiment, the structure diagram of field generator.This field generator includes electrode 501, electricity
Pole 501 is arranged in breathable housing.Extraneous air can be contacted with the electrode 501 of enclosure interior by housing,
Here electrode 501 can be carbon fibre material can also be metal needle etc..This housing is provided with insulating barrier 502 and/or screen layer
503, this insulating barrier is for insulating described electric field with the external world, and this screen layer is for shielding this electric field relative to the external world
Cover.Such as, insulating barrier 502 here and screen layer 503 can also be arranged in housing in can being arranged on housing, it is also possible to
Time arrange and can also be separately provided, this setup can be bonding, and the mode such as inlay card is arranged on housing, it is also possible to be
The mode such as extrude, wrapped is arranged on hull outside.
In one in embodiment, housing parts could be arranged to cylinder, and outermost layer can be copper product, as electromagnetic screen
Cover layer 503；Nexine can use plastic material, as insulating barrier 502；Can be distributed on the cylinder and stamp aperture, the least
Hole can be the small sircle hole of a diameter of 1.5mm, as air inlet passage.
In one embodiment, electrode 501 is provided with filter course, for filtering the particulate matter of predetermined diameter scope, such as
Filtering layer is configured to the particulate matter filtering out diameter more than 2.5 microns, and this fine particle is also known as PM2.5.Fine particle finger ring
The aerodynamic equivalent diameter particulate matter less than or equal to 2.5 microns in the air of border.It can be suspended in air the long period, its
Content concn is the highest in atmosphere, just represents air pollution the most serious.Although PM2.5 be in earth atmosphere composition content little
Component, but it has important impact to air quality and visibility etc..Compared with thicker Atmospheric particulates, PM2.5 particle diameter
Little, area is big, and activity is strong, the most incidentally poisonous and harmful substances, such as heavy metal, microorganism etc., and the time of staying in an atmosphere
Length, fed distance are remote, thus the impact on health and atmosphere quality is bigger.The most just can be used for detecting PM2.5's
Mass concentration value.Filter course can be the micro-filtration membrane etc. of filter paper, polystyrene.Filter course can also set in can being arranged on housing
Putting outside housing, this setup can be bonding, and the mode such as inlay card is arranged on housing, it is also possible to be extrude, wrapped etc.
Mode is arranged on hull outside.
In one embodiment, this field generator can include electrode spaced a predetermined distance, between electrode here
Away from being adjustable.Each electrode 501 can be provided with tip, and go-and-retum is away from there being certain requirement, must prevent from puncturing and protecting
Card sensitivity.
In one embodiment, electrode 501 is arranged on the two ends of housing, and electrode 501 tip separation can be by regulation portion
Part is adjusted, such as can be by the distance at screw thread adjustable electrode 501 tip.
In one embodiment, such as high tension generator 301 can produce the negative voltage that size is 3800v, precision resistance
Resistance can be chosen as 1M Ω, two electrode 501 tip separation could be arranged to 7mm.In one embodiment, concentration of dust
Detection device can pass through at least one communication module (can be wire communication module or wireless communication module) realize and extremely
Communication connection between few other network elements, this wireless communication module receives the mass concentration letter drawn by this processor analysis
Number, and this mass concentration signal is sent to long-range server or Portable movable client, such as can pass through bluetooth mould
Block, is uploaded to far-end server or Portable movable client in real time by the dust granules concentration value recorded, and display in real time is altogether
Enjoy data, equally use the wireless communication modules such as infrared, wireless network to play similar communication efficiency.
It should be noted that, in the claims, word " comprises " or " including " is not precluded from existing and does not arranges in the claims
Element or assembly.Article "a" or "an" before being positioned at element or assembly is also not precluded from there is multiple such element
Or the situation of assembly.
Furthermore, it should also be noted that the language used in this specification primarily to the readable and purpose of teaching and select
That select rather than select to explain or limit theme of the present utility model.Therefore, without departing from claims
In the case of the scope and spirit of book, for those skilled in the art many modifications and changes be all aobvious and
It is clear to.About scope of the present utility model, the description done in description is all illustrative and not restrictive, this reality
It is defined by the appended claims by novel scope.
Claims (10)
1. a concentration of dust detection device, is characterized in that, including:
Field generator, for producing electric field with by described gas ionization to be measured in gas to be measured；
Electric signal measurement module, is connected to described field generator, the signal of telecommunication in the loop measuring described electric field place
Change；And
Processor, receives the described signal of telecommunication, and for analyzing the change of the signal of telecommunication, thus it is dense to obtain the quality of dust in gas to be measured
Angle value.
2. concentration of dust detection device as claimed in claim 1, is characterized in that, described field generator includes:
Electrode, described electrode is arranged in described gas to be measured；And
High tension generator, described high tension generator is connected to described electrode,
Wherein, described electrode discharges electronics under the high pressure that described high tension generator provides.
3. concentration of dust detection device as claimed in claim 1, is characterized in that, the described signal of telecommunication include electric current, voltage and
At least one in electric capacity.
4. concentration of dust detection device as claimed in claim 1, is characterized in that, described electric signal measurement module includes being connected on
Resistance in described loop.
5. concentration of dust detection device as claimed in claim 1, is characterized in that, also include following at least one:
Filtration module, for being filtered filtering off the noise signal in the described signal of telecommunication to the described signal of telecommunication；
Amplification module, for amplifying the change of the described signal of telecommunication；
A/D modular converter, for the described signal of telecommunication is converted into digital signal from analogue signal,
Wherein, described digital signal is analyzed by described processor.
6. concentration of dust detection device as claimed in claim 1, is characterized in that, described field generator includes being spaced pre-spacing
From electrode, the spacing of described electrode is adjustable.
7. concentration of dust detection device as claimed in claim 1, is characterized in that, be additionally provided with filter course, is used for filtering described
The particulate matter of predetermined diameter scope in gas to be measured.
8. concentration of dust detection device as claimed in claim 1, is characterized in that, be additionally provided with insulating barrier and/or screen layer, institute
Stating insulating barrier for being insulated with the external world by described electric field, described screen layer is for shielding described electric field relative to the external world
Cover.
9. concentration of dust detection device as claimed in claim 7, is characterized in that, it is big that described filter course is configured to filter diameter
In the particulate matter of 2.5 microns.
10. concentration of dust detection device as claimed in claim 1, is characterized in that, also include wireless communication module, described wireless
Communication module receives the mass concentration signal drawn by described processor analysis, and is sent to remotely by described mass concentration signal
Server or Portable movable client.
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|---|---|---|---|
| CN201620346222.3U CN205719880U (en) | 2016-04-22 | 2016-04-22 | Concentration of dust detection device |
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| CN201620346222.3U CN205719880U (en) | 2016-04-22 | 2016-04-22 | Concentration of dust detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784555A (en) * | 2016-04-22 | 2016-07-20 | 西人马（厦门）科技有限公司 | Dust concentration detection device and dust concentration detection method |
| CN110214266A (en) * | 2017-01-26 | 2019-09-06 | 日本碍子株式会社 | Particle number detector |
| CN113358945A (en) * | 2021-07-01 | 2021-09-07 | 兰州空间技术物理研究所 | Multifunctional space high-speed dust characteristic detector |
-
2016
- 2016-04-22 CN CN201620346222.3U patent/CN205719880U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784555A (en) * | 2016-04-22 | 2016-07-20 | 西人马（厦门）科技有限公司 | Dust concentration detection device and dust concentration detection method |
| CN110214266A (en) * | 2017-01-26 | 2019-09-06 | 日本碍子株式会社 | Particle number detector |
| CN113358945A (en) * | 2021-07-01 | 2021-09-07 | 兰州空间技术物理研究所 | Multifunctional space high-speed dust characteristic detector |
| CN113358945B (en) * | 2021-07-01 | 2023-07-28 | 兰州空间技术物理研究所 | Multifunctional space high-speed dust characteristic detector |
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