CN107462502A - Measuring concentration of granules in certain system - Google Patents
Measuring concentration of granules in certain system Download PDFInfo
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- CN107462502A CN107462502A CN201710653124.3A CN201710653124A CN107462502A CN 107462502 A CN107462502 A CN 107462502A CN 201710653124 A CN201710653124 A CN 201710653124A CN 107462502 A CN107462502 A CN 107462502A
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- 238000001914 filtration Methods 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000013618 particulate matter Substances 0.000 claims abstract description 20
- 230000003321 amplification Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 15
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G01N15/075—
Abstract
The invention provides a kind of measuring concentration of granules in certain system.Mainly include：Air transmission cavity, laser drive module, signal detection module, filtering and modular converter, high-pass filtering and amplification module and microprocessor；Laser drive module driving laser transmitting beam of laser, focuses the laser beam in the air by front lens and transmits in cavity a bit；Signal detection module receives particulate matter by laser beam focus points and caused scattering light, generation pulse signal；Filtering and modular converter pulse signals are converted to voltage signal, and filtering and modular converter filter out the flip-flop in voltage signal, be amplified processing to the alternating component in voltage signal, obtain valid data；Microprocessor carries out computing to valid data, obtains the particle concentration value in air transmission cavity.The present invention can effectively utilize particulate matter is by producing scattering light during laser beam focus points in cavity the characteristics of, quickly and efficiently calculate the particle concentration in air.
Description
Technical field
The present invention relates to particulate matter field of measuring technique, more particularly to a kind of measuring concentration of granules in certain system.
Background technology
Particulate matter, also known as dirt.Solid or liquid particles shape material in air.Particulate matter can be divided into primary particulate and two
Secondary particulate matter.Primary particulate is to be discharged into the atmosphere to directly contribute the particle of pollution by natural pollution source and man-made pollution source
Thing, such as soil particle, sea salt particle, combustion fumes etc..Secondary aerosol species be by some contaminating gaseous components in air (such as
Sulfur dioxide, nitrogen oxides, hydrocarbon etc.) between, or between normal components (such as oxygen) in these components and air
Reacted by photochemical oxidation, the particulate matter that catalytic oxidation or other chemical reactions are converted into, such as sulfur dioxide turns
Metaplasia is into sulfate.
With Particulate Pollution, particularly PM2.5 pollutions are increasingly severe, more next to the particle concentration collection in air
More attract people's attention.Therefore it provides a kind of equipment for effectively gathering the particle concentration in air is one and urgently solved
Certainly the problem of.
The content of the invention
The embodiment provides a kind of measuring concentration of granules in certain system, and air is effectively gathered and measure to realize
In particle concentration.
To achieve these goals, this invention takes following technical scheme.
A kind of measuring concentration of granules in certain system, including：Air transmission cavity, laser drive module, signal detection module,
Filtering and modular converter, high-pass filtering and amplification module and microprocessor；
Described laser drive module, for driving laser to launch beam of laser, by front lens laser beam
Focus in the air transmission cavity a bit, produced when particulate matter transmits the laser beam focus points in cavity by the air
Raw scattering light；
Described signal detection module, for receiving particulate matter by laser beam focus points and caused scattering light, according to
The scattering light produces pulse signal, by pulse signal transmission to filtering and modular converter；
Described filtering and modular converter, after being filtered processing to the pulse signal, voltage signal is converted to,
The voltage signal is transferred to high-pass filtering and amplification module；
Described filtering and modular converter, for filtering out the flip-flop in the voltage signal, to by the voltage
Alternating component in signal is amplified processing, obtains valid data, and the valid data are transferred into microprocessor；
Described microprocessor, computing is carried out to the valid data for the calculating process by setting, obtained described
Particle concentration value in air transmission cavity.
Further, described system also includes：
Connector, for connecting power module and microprocessor, 8 pins are provided to microprocessor, wherein：2 pins
For positive source and power cathode, steady dc voltage is provided to microprocessor；2 pins are that microprocessor program burning is drawn
Pin；1 pin is microprocessor reset pin RESET；1 pin is that sensor enables pin SET；TXD pins, RXD pins 2
Individual pin is microprocessor UART serial ports, and TXD pins are used for external transmission sensor data, and RXD pins are used to receive outside school
Quasi- data.
Further, described system also includes：
Fan-driving module, for being electrically connected with the microprocessor, include rotation speed of the fan feedback circuit, rotation speed of the fan
Controlling switch, filter capacitor and current-limiting resistance, during system worked well, microprocessor opens fan speed control switch, voltage
Fan is transferred to by filter capacitor and current-limiting resistance；Fan current operating state is fed back to Wei Chu by rotation speed of the fan feedback circuit
Device is managed, when rotation speed of the fan deviates rotating speed of target, microprocessor control rotation speed of the fan switch turns fan rotational speed regulation to target
Speed；Fan is pumped into outside air in the specific wind path of system, and causes air flow through air transmission cavity.
Further, described system also includes：
Power module, for connecting microprocessor, fan and laser starting module, to the microprocessor, fan and swash
Photopolymerization initiation module provides DC voltage.
Further, described signal detection module, to contain silicon photo diode and bleeder circuit, the bleeder circuit
Voltage is provided to the silicon photo diode, the silicon photo diode is placed in special angle in the air transmission cavity, with laser
Beam focus distance is setpoint distance, and the silicon photo diode receives particulate matter by laser beam focus points and caused scattering
Light, pulse signal is produced according to the scattering light, by pulse signal transmission to filtering and modular converter.
Further, described filtering and modular converter, to contain operational amplifier, filter capacitor, resistance and bypass
Electric capacity, the filter capacitor filter out the signal detection module be transmitted through come pulse signal in impurity, institute's operational amplifier,
The shift pulse signal that resistance and shunt capacitance export the filter capacitor is voltage signal, and the voltage signal is transferred to
High-pass filtering and amplification module.
Further, described high-pass filtering and amplification module, to contain high-pass filter and operational amplifier, high pass
Flip-flop in the voltage signal that wave filter transmits filtering and modular converter filters out, then passes through operational amplifier handle
Alternating component in the voltage signal is amplified to the valid data that microprocessor can collect, and the valid data are transmitted
To microprocessor.
Described microprocessor, for being driven respectively with the connector, power module, fan-driving module, laser
Module and high-pass filtering and amplification module electrical connection, control the fan-driving module, laser drive module unlatching and
Stop, and control the fan to maintain rotating speed of target according to the feedback information of the fan-driving module, in fan and laser lamp
After normal work, start the valid data that internal ADC gathers the high-pass filtering and amplification module transmits, pass through setting
Calculating process to the valid data carry out computing, initial operation values are obtained, by the calibration data base of storage inside to institute
State initial operation values to be modified, obtain the particle concentration value in the air transmission cavity.
Further, in a calibration process, host computer is sent the microprocessor by RXD pins to the microprocessor
Interrupt instruction, after the microprocessor receives the interrupt instruction, by current initial operation values deposit microprocessor internal
Calibration data base.
Further, equally distributed batch measuring concentration of granules in certain system is set in confined space, places a station symbol
Quasi- particle concentration tester device makees reference calibrations source, and pollution is manufactured in the confined space to predetermined concentration value, will be referred to
The data of calibration source are sent to the microprocessor portion of each particulate measurement system, and each microprocessor is drawn pair by internal arithmetic
The coefficient of rectifying deviation answered.
The embodiment of the present invention by laser by being driven it can be seen from the technical scheme provided by embodiments of the invention described above
The unit such as dynamic model block, signal detection module, filtering and modular converter, high-pass filtering and amplification module and microprocessor forms particle
Thing concentration measurement system, the spy that particulate matter scatters light by being produced during laser beam focus points in cavity can be effectively utilized
Point, wave filter, operational amplifier and microprocessor is recycled to carry out particulate matter that is accurate, quickly and to effectively calculating in air dense
Degree, using the correcting process of calibration data base, it can further improve the measurement accuracy of particle concentration.
The additional aspect of the present invention and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structure chart of measuring concentration of granules in certain system provided in an embodiment of the present invention；
Fig. 2 is a kind of working mechanism's schematic diagram of microprocessor provided in an embodiment of the present invention.
Embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is individual ", " described " and "the" may also comprise plural form.It is to be further understood that what is used in the specification of the present invention arranges
Diction " comprising " refer to the feature, integer, step, operation, element and/or component be present, but it is not excluded that in the presence of or addition
One or more other features, integer, step, operation, element, component and/or their groups.It should be understood that when we claim member
Part is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Wording used herein
"and/or" includes any cell of one or more associated list items and all combined.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology) with the general understanding identical meaning with the those of ordinary skill in art of the present invention.Should also
Understand, those terms defined in such as general dictionary, which should be understood that, to be had and the meaning in the context of prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or the implication of overly formal be explained.
For ease of the understanding to the embodiment of the present invention, done further by taking several specific embodiments as an example below in conjunction with accompanying drawing
Explanation, and each embodiment does not form the restriction to the embodiment of the present invention.
The structure chart of measuring concentration of granules in certain system provided in an embodiment of the present invention is as shown in figure 1, including air transmission cavity
Road, connector, power module, fan-driving module, laser drive module, signal detection module, filtering and modular converter, height
Pass filter and amplification module and microprocessor.
Connector, for connecting power module and microprocessor, specification is the horizontal paster seat of 8P1.25mm spacing.Connector
Altogether 8 pins are provided to microprocessor.Wherein：
2 pins are positive source and power cathode, and steady dc voltage is provided to microprocessor；
2 pins are microprocessor program burning pin；
1 pin is that microprocessor reset pin RESET, RESET pin is defaulted as high level, and outside drags down, and resets whole
Individual microprocessor；
1 pin is that enabled pin SET, the SET pin of sensor is defaulted as low level, and microprocessor is not worked, and outside is drawn
High SET pins, then microprocessor normal work；
2 TXD pins, RXD pins pins are microprocessor UART serial ports, and TXD pins are used for external transmission sensor number
According to RXD pins are used to receive external calibration data.
Power module includes filter capacitor and low pressure difference linear voltage regulator, output multi-channel stable DC voltage, connects micro-
Processor, fan and laser starting module.Steady dc voltage VDD3 is provided to fan simultaneously, is provided to microprocessor stable
DC voltage VDD2, and give laser starting module to provide steady dc voltage VDD1.
Fan-driving module includes rotation speed of the fan feedback circuit, fan speed control switch, filter capacitor and current-limiting resistance.
During system worked well, microprocessor opens fan speed control switch, and voltage ensures wind by current-limiting resistance and filter capacitor
Fan the stabilization of power supply；Fan current operating state is fed back to microprocessor by rotation speed of the fan feedback circuit, when rotation speed of the fan deviates
During rotating speed of target, microprocessor control rotation speed of the fan switch is fan rotational speed regulation to rotating speed of target；Fan takes out outside air
Enter in the specific wind path of system, and cavity is transmitted by air with making steady air current, pass through sky with ensure particulate matter stable and uniform
Gas transmits cavity.
Laser drive module includes high-performance laser, lens, radiating tube and laser control switch；Microprocessor is beaten
Laser control switch is driven, laser normal work transmitting beam of laser, air is focused the laser beam in by front lens and passes
In defeated cavity a bit, scattering can be produced when particulate matter passes through laser beam focus points.Laser has hair after working long hours
Thermal phenomenon, radiating tube are enclosed on laser external, are radiated to laser, to ensure that laser long-time stable works.
Signal detection module includes silicon photo diode and bleeder circuit；Bleeder circuit provides stable electricity to silicon photo diode
Pressure；Silicon photo diode is placed in special angle in air transmission cavity, maximum with laser beam focus points distance about 1.5-2.0mm
Particle is received to degree by laser beam focus points and caused scattering light, silicon photo diode produces pulse after receiving scattering light
Signal, by the incoming filtering of pulse signal and modular converter.
Filtering and modular converter include operational amplifier, filter capacitor, precision resister and shunt capacitance；Signal detection mould
The pulse signal that block is transmitted through filters out impurity by filter capacitor, ensures the pure of pulse signal；Operational amplifier and height
Accuracy resistance and shunt capacitance are changed into pulse signal faint voltage signal, and voltage signal is transferred into high-pass filtering and put
Big module.
High-pass filtering and amplification module include high-pass filter and operational amplifier, and high-pass filter is filtering and modulus of conversion
Flip-flop in the voltage signal that block transmits is filtered out, then faint alternating component is amplified to by operational amplifier
The valid data that microprocessor can collect, valid data are transferred to microprocessor.
Microprocessor is the maincenter of whole system, is driven respectively with connector, power module, fan-driving module, laser
Dynamic model block and high-pass filtering and amplification module electrical connection.After power module is to microprocessor power supply, microprocessor starts work
Make, the working mechanism of microprocessor is as shown in Fig. 2 system initialization, including the initialization of microprocessor I/O pin, ADC
(Analog-to-Digital Converter, analog-digital converter) initializes, serial ports UART initialization, timer initialization etc.；
Fan is opened, outside air, which is pumped into special air, by fan transmits in cavity, judges whether fan operates, is weighed if without if
It is new to open, laser lamp is opened if working properly；After fan and laser lamp normal work, start the ADC gathered datas of inside, it is right
The valid data that ADC is collected carry out Fourier transform, the relation between time-domain and frequency-domain in valid data are obtained, further according to effective
Relation in data between time-domain and frequency-domain calculates the initial operation values of particulate matter by algorithm, and the initial operation values include
The particulate matter quantity of different-grain diameter in the equivalent grain size and unit volume of grain thing.
Initial operation values are again present air by the calibration data base amendment of microprocessor internal, revised data
Transmit the particle concentration value in cavity, that is, the particle concentration value in ambient atmosphere environment.Serial ports TXD mono- second is to outgoing
Send the concentration Value Data of particulate matter in a frame current environment.
In a calibration process, host computer can send interrupt instruction to microprocessor by RXD to microprocessor, and microprocessor connects
After the above-mentioned interrupt instruction for receiving serial ports, by the calibration data base of current initial operation values deposit microprocessor internal.Microprocessor
Device is repeatedly stored in initial operation values by repeatedly sending interrupt instruction in calibration data base.So as to construct calibration data base,
The data correction that the calibration data base is used for after normal work.
The Zero positioning method of above-mentioned measuring concentration of granules in certain system, this method are dispatched from the factory for measuring concentration of granules in certain system
When batch calibrate, including：Equally distributed batch measuring concentration of granules in certain system is set in confined space, while places one
Standard particle thing concentration determination instrument makees reference calibrations source, forms the calibration environment of standard.Then, made in above-mentioned confined space
Pollution is made to predetermined concentration value, the data (such as 100ug/m3) in reference calibrations source are sent to micro- place of each particulate measurement system
Device part is managed, microprocessor draws corresponding coefficient of rectifying deviation by internal arithmetic.
In summary, the embodiment of the present invention passes through by laser drive module, signal detection module, filtering and modulus of conversion
The unit such as block, high-pass filtering and amplification module and microprocessor forms measuring concentration of granules in certain system, can effectively utilize
Grain thing is by producing scattering light during laser beam focus points in cavity the characteristics of, recycles wave filter, operational amplifier and Wei Chu
Reason device is accurate, quickly and to effectively calculates particle concentration in air, can be with using the correcting process of calibration data base
Further improve the measurement accuracy of particle concentration.Signal input in existing signal processing can be overcome easily to be disturbed,
The technological deficiencies such as signal processing accuracy or handling process are unreasonable.Uniformity between measuring concentration of granules in certain system obtains
Very big raising is arrived.
One of ordinary skill in the art will appreciate that：Accompanying drawing is the schematic diagram of one embodiment, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
One of ordinary skill in the art will appreciate that：The part in device in embodiment can describe to divide according to embodiment
It is distributed in the device of embodiment, respective change can also be carried out and be disposed other than in one or more devices of the present embodiment.On
The part for stating embodiment can be merged into a part, can also be further split into multiple subassemblies.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.Especially for device or
For system embodiment, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method
The part explanation of embodiment.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates can be or may not be it is physically separate, can be as the part that unit is shown or
Person may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can root
Factually border needs to select some or all of module therein realize the purpose of this embodiment scheme.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (10)
- A kind of 1. measuring concentration of granules in certain system, it is characterised in that including：Air transmission cavity, laser drive module, signal Detection module, filtering and modular converter, high-pass filtering and amplification module and microprocessor；Described laser drive module, for driving laser to launch beam of laser, by front lens laser beam focus Transmitted in the air in cavity a bit, produce and dissipate when particulate matter transmits the laser beam focus points in cavity by the air Penetrate light；Described signal detection module, for receiving particulate matter by laser beam focus points and caused scattering light, according to described Scatter light and produce pulse signal, by pulse signal transmission to filtering and modular converter；Described filtering and modular converter, after being filtered processing to the pulse signal, voltage signal is converted to, by institute State voltage signal and be transferred to high-pass filtering and amplification module；Described filtering and modular converter, for filtering out the flip-flop in the voltage signal, to by the voltage signal In alternating component be amplified processing, obtain valid data, the valid data be transferred to microprocessor；Described microprocessor, computing is carried out to the valid data for the calculating process by setting, obtains the air Transmit the particle concentration value in cavity.
- 2. system according to claim 1, it is characterised in that described system also includes：Connector, for connecting power module and microprocessor, 8 pins are provided to microprocessor, wherein：2 pins are electricity Source positive pole and power cathode, steady dc voltage is provided to microprocessor；2 pins are microprocessor program burning pin；1 Individual pin is microprocessor reset pin RESET；1 pin is that sensor enables pin SET；TXD pins, RXD pins 2 draw Pin is microprocessor UART serial ports, and TXD pins are used for external transmission sensor data, and RXD pins are used to receive external calibration number According to.
- 3. system according to claim 2, it is characterised in that described system also includes：Fan-driving module, for being electrically connected with the microprocessor, controlled comprising rotation speed of the fan feedback circuit, rotation speed of the fan Switch, filter capacitor and current-limiting resistance, during system worked well, microprocessor opens fan speed control switch, and voltage passes through Filter capacitor and current-limiting resistance are transferred to fan；Fan current operating state is fed back to microprocessor by rotation speed of the fan feedback circuit Device, when rotation speed of the fan deviates rotating speed of target, microprocessor control rotation speed of the fan switch is fan rotational speed regulation to rotating speed of target； Fan is pumped into outside air in the specific wind path of system, and causes air flow through air transmission cavity.
- 4. system according to claim 2, it is characterised in that described system also includes：Power module, for connecting microprocessor, fan and laser starting module, opened to the microprocessor, fan and laser Dynamic model block provides DC voltage.
- 5. according to the system described in any one of Claims 1-4, it is characterised in that：Described signal detection module, to contain silicon photo diode and bleeder circuit, the bleeder circuit gives the silicon light two Pole pipe provides voltage, and the silicon photo diode is placed in special angle in the air transmission cavity, with laser beam focus points distance For setpoint distance, the silicon photo diode receives particulate matter by laser beam focus points and caused scattering light, is dissipated according to described Penetrate light and produce pulse signal, by pulse signal transmission to filtering and modular converter.
- 6. system according to claim 5, it is characterised in that：Described filtering and modular converter, to contain operational amplifier, filter capacitor, resistance and shunt capacitance, the filtering Electric capacity filters out the impurity that the signal detection module is transmitted through in next pulse signal, institute's operational amplifier, resistance and bypass electricity It is voltage signal to hold the shift pulse signal of filter capacitor output, and the voltage signal is transferred into high-pass filtering and put Big module.
- 7. system according to claim 6, it is characterised in that：Described high-pass filtering and amplification module, to contain high-pass filter and operational amplifier, high-pass filter is filtering And the flip-flop in the voltage signal that transmits of modular converter filters out, then by operational amplifier the voltage signal In alternating component be amplified to the valid data that microprocessor can collect, the valid data are transferred to microprocessor.
- 8. system according to claim 7, it is characterised in that：Described microprocessor, for respectively with the connector, power module, fan-driving module, laser drive module It is electrically connected with high-pass filtering and amplification module, controls the unlatching and stopping of the fan-driving module, laser drive module, And control the fan to maintain rotating speed of target according to the feedback information of the fan-driving module, in fan and the normal work of laser lamp After work, start the valid data that internal ADC gathers the high-pass filtering and amplification module transmits, pass through the calculating of setting Process carries out computing to the valid data, obtains initial operation values, by the calibration data base of storage inside to described initial Operation values are modified, and obtain the particle concentration value in the air transmission cavity.
- 9. system according to claim 8, it is characterised in that in a calibration process, host computer passes through the microprocessor RXD pins send interrupt instruction to the microprocessor, will be currently initial after the microprocessor receives the interrupt instruction Operation values are stored in the calibration data base of microprocessor internal.
- 10. system according to claim 1, it is characterised in that equally distributed batch particle is set in confined space Thing concentration measurement system, place a standard particle concentration tester device and make reference calibrations source, made in the confined space The microprocessor portion for polluting and the data in reference calibrations source to predetermined concentration value, being sent to each particulate measurement system is made, respectively Microprocessor draws corresponding coefficient of rectifying deviation by internal arithmetic.
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| CN201710653124.3A CN107462502A (en) | 2017-08-02 | 2017-08-02 | Measuring concentration of granules in certain system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287218A (en) * | 2018-01-02 | 2018-07-17 | 北京金茂绿建科技有限公司 | Indoor thermostat Detection of Air Quality method, electronic equipment and storage medium |
| CN108287217A (en) * | 2018-01-02 | 2018-07-17 | 北京金茂绿建科技有限公司 | Indoor thermostat Detection of Air Quality method, electronic equipment and storage medium |
| CN108844868A (en) * | 2018-06-05 | 2018-11-20 | 北京交通大学 | The granular material discharged detector of portable vehicle |
| CN109342285A (en) * | 2018-11-27 | 2019-02-15 | 广州勒夫迈智能科技有限公司 | A kind of particle detection technique of infrared emission |
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