CN104132863B - A kind of particulate matter continuous monitoring device and method - Google Patents
A kind of particulate matter continuous monitoring device and method Download PDFInfo
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- CN104132863B CN104132863B CN201410403117.4A CN201410403117A CN104132863B CN 104132863 B CN104132863 B CN 104132863B CN 201410403117 A CN201410403117 A CN 201410403117A CN 104132863 B CN104132863 B CN 104132863B
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Abstract
The present invention relates to a kind of fine particle monitor, belong to environmental monitoring, and in particular to the particulate matter continuous monitoring device that a kind of trace oscillating balance method is merged with light scattering method.The present invention is based on trace oscillating balance method, particle concentration is measured by increasing light scattering method, normal concentration real time correction light scattering concentration is wherein used as using the concentration that trace oscillating balance method is surveyed, and light scattering method surveys concentration as the real-time supplement of trace oscillating balance method data, and it is used as the whether abnormal basis for estimation of trace oscillating balance method measurement data.The present invention not only realizes the measurement of volatile particles thing concentration, and solves the problem of sampled data can not be continuously；Particularly solve influence of the environmental disturbances to concentration measurement data, it is ensured that the accuracy of instrument measurement of concetration, improve instrument stabilizer reliability of operation.
Description
Technical field
The present invention relates to a kind of fine particle monitor, belong to environmental monitoring, and in particular to a kind of micro oscillating balance
The particulate matter continuous monitoring device that method is merged with light scattering method.
Background technology
It is currently based on application of the Atmospheric particulates automonitor of trace oscillating balance method in the whole nation very universal, product
Mainly 1405F type instruments of U.S. ThermoScientific companies.The instrument is based on trace oscillating balance method, adds
FDMS devices.The device replaces Fundamentals of Measurement concentration and reference concentration using timesharing, then both are subtracted each other obtains ultimate density.Make
With the device can preferably reduce volatile materials and half volatile material to measure concentration influence, but in use by
Replace Fundamentals of Measurement concentration in timesharing and reference concentration generates the new problem that measurement is discontinuous and stabilization time is long.
Because trace oscillating balance method is that quality is detected by the frequency signal of vibration, and there is pumping in monitoring station
The vibration of pump, the activity of staff and the ground factor such as built on the sand, the irregular oscillation stress direct interference instrument of generation,
Often there are abnormal concentration values.
The content of the invention
Timesharing alternating Fundamentals of Measurement concentration in the presence of the present invention mainly solution prior art is produced with reference concentration
The irregular oscillation stress that the problem of raw measurement can not be continuously and instrument running are present is interfered and caused to instrument
The problem of abnormal concentrations data, not only realizes there is provided a kind of particulate matter continuous monitoring device and method, the apparatus and method
The measurement function of volatility concentration, and also solve the problem of data during volatility measurement of concetration can not be continuously, reduction
Influences of the environmental disturbances to concentration measurement data, improve the accuracy and reliability of apparatus measures data, extend instrument
The environmental suitability of operation.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：
A kind of particulate matter continuous monitoring device, including：Sample inlet, cutter for particles, drier, light scattering module,
Triple valve, trace oscillating balance method quality detection module, flow-control module, wherein：The sample inlet, particulate matter cutting
Device, drier are sequentially connected in series；The first port of the triple valve is communicated with light scattering module, second port and micro oscillating balance
The inlet end of method quality detection module is connected, and the 3rd port is connected by constant temperature filter with second port；
The drier point is inside and outside two layers, and internal layer is provided with sampling air flow passage, and outer layer is provided with dry gas stream passage, described to adopt
Sample gas channel is communicated with the gas channel of the cutter for particles, and the inlet end of the dry gas stream passage passes through air-flow stream
Dry gas stream control unit in amount control unit is communicated with the outlet side of the sedimentation balance method quality detection module, the dry gas
The outlet side of circulation road is connected with aspiration pump；Institute's light scattering module is located on the passage between drier and triple valve.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, in addition to shunting adapter, the shunting adapter
Inlet end is connected with the outlet side of the cutter for particles, the shunting main outlet side of adapter and the air inlet of the drier
End is connected, and the bypass outlet side of the shunting adapter passes through in auxiliary gas circuit grade one filter and air flow rate control unit
Auxiliary gas circuit flow controlling unit is connected with the aspiration pump.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, the gas flow of the sample inlet for 1~
16.67L/min, the gas flow of the main outlet side of the shunting adapter is 0.5~5L/min.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, the light scattering module is seal cavity, and it measures gas
Flow channel inlet is clear opening or taper hole, and a diameter of 2~15mm, the gas flow passed through is 0.5~5L/min.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, the light scattering module includes luminous component, acceptance division
Part, lens and circuit conditioning part, LED or laser tube that the luminous component is 650nm.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, the trace oscillating balance method quality detection module bag
Include：Cone-shaped glass oscillating tube in constant temperature cavity, for gather the sampling membrane of tested particulate matter adopt and driving coil with
Hall sensor, wherein, the constant temperature point of the constant temperature cavity is located between 10~50 DEG C, and its constant temperature stability is not less than 0.05
DEG C, stability of flow degree is not less than 0.01L/min.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, the blowback air of the dry gas stream passage of the drier
The vacuum of stream in more than 20kPa, and pass through the drier sampling air flow passage measurement air-flow dew point -2 DEG C with
Under, and constant humidity heater is provided with drier air inlet, the air-flow relative humidity into drier is less than 50%.
Optimization, a kind of above-mentioned particulate matter continuous monitoring device, the constant temperature filter is carried out using diode mode
Refrigeration is heated, and carries out thermostatic control using pid algorithm, and its refrigerated constant temperature temperature is 2~10 DEG C, and heating-up temperature is 30~70
℃。
A kind of method that particulate matter continuous monitoring is carried out using above-mentioned particulate matter continuous monitoring device, including：
Whether measuring state detecting step, detecting system is in effective measuring state, under effective measuring state, warp
The dew point for the measurement air-flow crossed after drier is in stable state, while the flow that flow controlling unit measurement measurement is obtained is located
In stable state, the constant temperature of trace oscillating balance method quality detection module is in stable state, and frequency signal is in stable state；
Relation function fit procedure, under effective measuring state, according to multigroup trace oscillating balance method quality detection module
The particle concentration fitting for measuring obtained particle concentration and being obtained with time light scattering module measurement obtains oscillating balance
Method particulate matter valid density and light dissipate the valid density relation function between color method particle concentration；
Non-steady state measuring process, in the state of flow controlling unit and drier steady operation, if micro vibration day
It is dense according to the particulate matter that light scattering module measurement is obtained when the temperature or quality testing signal of flat method quality detection module are not stablized
Degree and the valid density relation function calculate the valid density of trace oscillating balance method quality detection module measurement.
Optimization, a kind of method of above-mentioned particulate matter continuous monitoring, the relation function fit procedure further comprises：
Base concentration measures sub-step, opens the first port and second port of triple valve, closes the 3rd port, makes threeway
Valve works in A condition, now, and the particle concentration that light scattering module measurement is obtained is light scattering base concentration CLbase, it is micro to shake
It is oscillating balance base concentration C to swing the particle concentration that sedimentation balance method quality detection module measurement obtainsbase；
Reference concentration measures sub-step, opens first port and the 3rd port of triple valve, closes second port, make threeway
Valve works in B state now, now, and the particle concentration that light scattering module measurement is obtained is light scattering reference concentration CLref, it is micro-
The particle concentration that amount oscillating balance method quality detection module measurement is obtained is oscillating balance reference concentration Cref；
Correction data obtains sub-step, based on formula CA=Cbase-CrefCalculate valid density of the oscillating balance in A condition
CA, wherein：CbaseFor oscillating balance Fundamentals of Measurement concentration, CrefFor oscillating balance reference concentration, according to light scattering base concentration
CLbase, oscillating balance valid density CAMultiple effective correction datas are built to { CLbase, CA}；
Relation function is fitted sub-step, repeats basic measurement of concetration sub-step, reference concentration measurement sub-step, correction data
Sub-step is obtained, multiple effective correction datas are obtained to { CLbase, CA, and fitting is obtained by reflection shaken according to effective correction data
Swing valid density C of the balance in A conditionAWith light scattering base concentration CLbaseThe valid density relation function C of relationA=F
(CLbase)；
Optimization, a kind of method of above-mentioned particulate matter continuous monitoring, in addition to：
Effective reference concentration calculates sub-step, and trace oscillating balance method quality is calculated by the valid density relation function
Valid density C of the detection module (12) in triple valve B stateB=F (CLref)。
Optimize, a kind of above-mentioned method of particulate matter continuous monitoring, formula C is based in the non-steady state measuring processA
=F (CLbase) calculate valid density of the trace oscillating balance method quality detection module (12) in A condition, wherein CLbaseFor light
The particle concentration that scattering module (7) measurement is obtained.
Therefore, the invention has the advantages that：1. realizing continuous measurement, the measurement work(of volatility concentration is not only realized
Can, also solve the problem of data during volatility measurement of concetration can not be continuously；2. data are relatively reliable, solve environment and do
The influence to concentration measurement data is disturbed, the accuracy and reliability of apparatus measures data is improved；3. application is wider, extension
The environmental suitability of instrument operation.
Brief description of the drawings
Accompanying drawing 1 is the structure chart of the present invention.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.In figure,
Sample inlet 1, cutter for particles 2 shunts adapter 3, measures air-flow 4, auxiliary air-flow 5, drier 6, light scattering module 7, three
Port valve 8, constant temperature filter 9, blowback air-flow 10, blowback air-flow 11, trace oscillating balance method quality detection module 12, auxiliary gas circuit one
Level filter 13, air flow rate control module 14, aspiration pump 15, dry gas stream control unit 16, auxiliary gas circuit flow controlling unit
17。
Embodiment：
As shown in figure 1, a kind of particulate matter continuous monitoring device, including：Sample inlet 1, cutter for particles 2, shunting is suitable
Orchestration 3, drier 6, light scattering module 7, triple valve 8, constant temperature filter 9, trace oscillating balance method quality detection module 12 is auxiliary
Gas circuit grade one filter 13, air flow rate control module 14, aspiration pump 15, dry gas stream control unit 16, auxiliary gas circuit flow control
Unit 17 processed.
Sample inlet 1 is connected with cutter for particles 2.Shunt the inlet end of adapter 3 and the outlet of cutter for particles 2
End is connected, and shunting adapter 3 main outlet side is connected with the inlet end of drier 6, shunt adapter 3 bypass outlet side pass through it is auxiliary
Auxiliary gas circuit flow controlling unit 17 and piston type or blade in gas circuit grade one filter 13 and air flow rate control unit 14
Formula aspiration pump 15 is connected.
Wherein, the gas flow of sample inlet 1 is designed as 1~16.67L/min, shunts the gas of the main outlet side of adapter 3
Body flow design is 0.5~5L/min；The use quality flow sensor of flow controlling unit 14 detect respectively measurement air-flow 4 with it is auxiliary
Air-flow 5, use ratio valve controls flow respectively, wherein auxiliary air-flow 5 can also use turbine type or plate hole formula gas flow to sense
Device carries out flow detection.
Triple valve 8 is the electrical ball valve or push away valve that reducing motor drives, and can also use pneumatic ball valve or push away valve.Its
First port is communicated with drier 6, and second port is connected with the inlet end of trace oscillating balance method quality detection module 12, and the 3rd
Port is connected by constant temperature filter 9 with second port.Wherein, constant temperature filter 9 is freezed or added using diode mode
Heat, and thermostatic control is carried out using pid algorithm, its refrigerated constant temperature temperature is 2~10 DEG C, and heating-up temperature is 30~70 DEG C.
Drier 6 is inside and outside two layers using the isolation of Nafion membrane piece, is board-like or tube designs.Internal layer is logical provided with sampling air flow
Road, outer layer is provided with dry gas stream passage, and two-way air-flow is in opposite direction or vertical；Sampling air flow passage and cutter for particles
2 gas channel is communicated, and the inlet end of dry gas stream passage controls list by the dry gas stream in air flow rate control unit 14
Member 16 is communicated with the outlet side of sedimentation balance method quality detection module 12, and the outlet side of dry gas stream passage is connected with aspiration pump 15.
After said structure, measurement air-flow 4 is controlled single by trace oscillating balance method quality testing unit 12 and flow
Enter drier 6 as blowback inlet air flow 10 after member 14, as blowback gas circuit 11 is gone out after being come out from drier 6, finally import and take out
Air pump 15.Wherein：By the vacuum of the blowback air-flow 10 and 11 of the dry gas stream passage of drier 6 in more than 20kPa, and
By the dew point for measuring air-flow 4 of the sampling air flow passage of drier 6 below -2 DEG C.
Trace oscillating balance method quality detection module 12 includes：Cone-shaped glass oscillating tube in constant temperature cavity, is used for
The sampling membrane of the tested particulate matter of collection is adopted, wherein, the constant temperature point of constant temperature cavity is located between 10~50 DEG C, its constant temperature stability
It is not less than 0.05 DEG C, stability of flow degree is not less than 0.01L/min.
Scatter on the circulation road that module 7 is located between drier 6 and triple valve 8.The light scattering module 7 be seal cavity simultaneously
And including：Luminous component, receiving part, lens and circuit conditioning part, LED or laser that wherein luminous component is 650nm
Pipe, it is clear opening or taper hole that it, which measures gas channel entrance, and a diameter of 2~15mm, the gas flow passed through is 0.5~5L/
min。
In the present embodiment, the method for carrying out particulate matter continuous monitoring is as follows：
First determine whether whether detecting system is in effective measuring state, under effective measuring state, after drier 6
The dew point for measuring air-flow 4 is in stable state, while controlling control unit 14 to measure obtained measurement air-flow 4 and auxiliary air-flow 5
Flow is in stable state.
Under effective measuring state, if trace oscillating balance method quality detection module 12, which is in, stablizes work state, basis
Multigroup trace oscillating balance method quality detection module 12 measures obtained particle concentration and measured with time light scattering module 7
Obtained particle concentration fitting obtains having between oscillating balance method particulate matter valid density and the scattered color method particle concentration of light
Concentration relationship function is imitated, is specifically included：
Base concentration measures sub-step, opens the first port and second port of triple valve 8, closes the 3rd port, makes three
Port valve 8 works in A condition, now, and light scattering module 7 measures obtained particle concentration and dissipates color base plinth concentration C L for lightbase, it is micro-
The particle concentration that the measurement of amount oscillating balance method quality detection module 12 is obtained is oscillating balance base concentration Cbase；
Reference concentration measures sub-step, opens first port and the 3rd port of triple valve 8, closes second port, make three
Port valve 8 works in B state now, now, and light scattering module 7 measures obtained particle concentration and dissipates color reference concentration for light
CLref, it is oscillating balance reference concentration C that trace oscillating balance method quality detection module 12, which measures obtained particle concentration,ref；
Correction data obtains sub-step, based on formula CA=Cbase-CrefCalculate valid density of the oscillating balance in A condition
CA, wherein：CbaseFor oscillating balance Fundamentals of Measurement concentration, CrefFor oscillating balance reference concentration, color base concentration is dissipated according to light
CLbase, oscillating balance valid density CAMultiple effective correction datas are built to { CLbase, CA}；
Relation function is fitted sub-step, repeats basic measurement of concetration sub-step, reference concentration measurement sub-step, correction data
Sub-step is obtained, multiple effective correction datas are obtained to { CLbase, CA, and fitting is obtained by reflection shaken according to effective correction data
Swing valid density C of the balance in A conditionAColor base plinth concentration C L is dissipated with lightbaseThe valid density relation function C of relationA=F
(CLbase)；
Effective reference concentration calculates sub-step, and trace oscillating balance method quality testing is calculated by valid density relation function
Valid density C of the module 12 in triple valve B stateB=F (CLref)。
The continuity of sampled concentrations data is realized by above-mentioned steps：, can basis when triple valve works in A condition
Function F obtains valid density during B state；Likewise, when triple valve works in B state, A shapes can be obtained according to function F
Valid density during state.
Under effective measuring state, if the temperature or quality testing signal of trace oscillating balance method quality detection module 12 are not
When stable, trace oscillating balance method quality testing unit 12 surveys concentration CAIt is invalid, light can be passed through with functional relation obtained by last time
Scatter the concentration C L of module 7baseTry to achieve CA=F (CLbase).Because the stabilized speed of flow and dew point is quickly, constant temperature and quality testing
Signal stabilization speed is very slow, and the concentration data of trace oscillating balance method quality testing unit 12, the party are supplemented by this method
Method can also when instrument is disturbed by external vibration, temperature stress trace oscillating balance method quality testing unit 12 break down or
Used when abnormal, can also be by CA=F (CLbase) it is used as C measured by trace oscillating balance method quality testing unit 12AException is sentenced
Disconnected foundation.
It is dense as standard using the concentration that trace oscillating balance method is surveyed when carrying out particle concentration monitoring using the present embodiment
Degree, real time correction light scattering concentration；Concentration can be surveyed by the use of light scattering method simultaneously pre- in instrument as trace oscillating balance method
Heat, measurement interval and data filling during failure, and as trace oscillating balance method measurement data whether abnormal judgement
Foundation.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used sample inlet 1 herein, cutter for particles 2 shunts adapter 3, measures air-flow 4, auxiliary
Air-flow 5, drier 6, light scattering module 7, triple valve 8, constant temperature filter 9, blowback air-flow 10,11, trace oscillating balance method matter
Measure detection module 12, auxiliary gas circuit grade one filter 13, air flow rate control module 14, aspiration pump 15, dry gas stream control unit
16, the auxiliary grade of gas circuit flow controlling unit 17 term, but it is not precluded from the possibility using other terms.Using these terms only
Be in order to more easily describe and explain the present invention essence；Being construed as any additional limitation is all and this hair
What bright spirit was disagreed.
Claims (11)
1. a kind of method of particulate matter continuous monitoring, it is characterised in that based on following device, device includes：Sample inlet (1),
Cutter for particles (2), drier (6), light scattering module (7), triple valve (8), trace oscillating balance method quality detection module
(12), flow controlling unit (14), wherein：
The sample inlet (1), cutter for particles (2), drier (6) are sequentially connected in series；
The first port of the triple valve (8) is communicated with light scattering module (7), and second port is examined with trace oscillating balance method quality
The inlet end for surveying module (12) is connected, and the 3rd port is connected by constant temperature filter (9) with second port；
The drier (6) point is inside and outside two layers, and internal layer is provided with sampling air flow passage, and outer layer is provided with dry gas stream passage, described to adopt
Sample gas channel is communicated with the gas channel of the cutter for particles (2), and the inlet end of the dry gas stream passage passes through stream
Measure the dry gas stream control unit (16) and the outlet side phase of the sedimentation balance method quality detection module (12) in control unit (14)
Logical, the outlet side of the dry gas stream passage is connected with aspiration pump (15)；
Institute's light scattering module (7) is located on the passage between drier (6) and triple valve (8)；
Including：
Whether measuring state detecting step, detecting system is in effective measuring state, under effective measuring state, through overdrying
The dew point of measurement air-flow (4) after dry device (6) is in stable state, while the flow that flow controlling unit (14) measurement is obtained is equal
In stable state, the constant temperature of trace oscillating balance method quality detection module (12) is in stable state, and frequency signal is in steady
Determine state；
Relation function fit procedure, under effective measuring state, according to multigroup trace oscillating balance method quality detection module (12)
Measure obtained particle concentration and obtained particle concentration fitting is measured with time light scattering module (7) and obtain vibrating day
Flat method particulate matter valid density and light dissipate the valid density relation function between color method particle concentration；
Non-steady state measuring process, in the state of flow controlling unit (14) and drier (6) steady operation, if micro vibration
When the temperature or quality testing signal of sedimentation balance method quality detection module (12) are not stablized, obtained according to light scattering module (7) measurement
Particle concentration and the valid density relation function calculate trace oscillating balance method quality detection module (12) measurement
Valid density.
2. a kind of method of particulate matter continuous monitoring according to claim 1, it is characterised in that the relation function fitting
Step further comprises：
Base concentration measures sub-step, opens the first port and second port of triple valve (8), closes the 3rd port, makes threeway
Valve (8) works in A condition, now, and the particle concentration that light scattering module (7) measurement is obtained is light scattering base concentration CLbase,
The particle concentration that trace oscillating balance method quality detection module (12) measurement is obtained is oscillating balance base concentration Cbase；
Reference concentration measures sub-step, opens first port and the 3rd port of triple valve (8), closes second port, make threeway
Valve (8) works in B state now, now, and the particle concentration that light scattering module (7) measurement is obtained is light scattering reference concentration
CLref, the particle concentration that trace oscillating balance method quality detection module (12) measurement is obtained is oscillating balance reference concentration Cref；
Correction data obtains sub-step, based on formula CA=Cbase-CrefCalculate valid density C of the oscillating balance in A conditionA,
Wherein：CbaseFor oscillating balance Fundamentals of Measurement concentration, CrefFor oscillating balance reference concentration, according to light scattering base concentration CLbase、
Oscillating balance valid density CAMultiple effective correction datas are built to { CLbase, CA}；
Relation function is fitted sub-step, repeats basic measurement of concetration sub-step, reference concentration measurement sub-step, correction data and obtains
Sub-step, obtains multiple effective correction datas to { CLbase, CA, and reflection vibration day is obtained to fitting according to effective correction data
Put down the valid density C in A conditionAWith light scattering base concentration CLbaseThe valid density relation function C of relationA=F
(CLbase)。
3. the method for a kind of particulate matter continuous monitoring according to claim 2, it is characterised in that also include：
Effective reference concentration calculates sub-step, and trace oscillating balance method quality testing is calculated by the valid density relation function
Valid density C of the module (12) in triple valve B stateB=F(CLref)。
4. a kind of method of particulate matter continuous monitoring according to claim 3, it is characterised in that the non-steady state measurement
Formula C is based in stepA=F (CLbase) calculate trace oscillating balance method quality detection module (12) it is effective dense in A condition
Degree, wherein CLbaseObtained particle concentration is measured for light scattering module (7).
5. a kind of particulate matter continuous monitoring method according to claim 1, it is characterised in that also including shunting adapter
(3), the inlet end of the shunting adapter (3) is connected with the outlet side of the cutter for particles (2), the shunting adapter
(3) main outlet side is connected with the inlet end of the drier (6), and the bypass outlet side of the shunting adapter (3) passes through auxiliary gas
Auxiliary gas circuit flow controlling unit (17) and the aspiration pump in road grade one filter (13) and flow controlling unit (14)
(15) it is connected.
6. a kind of particulate matter continuous monitoring method according to claim 5, it is characterised in that the sample inlet (1)
Gas flow is 1~16.67L/min, and the gas flow of the main outlet side of the shunting adapter (3) is 0.5~5L/min.
7. a kind of particulate matter continuous monitoring method according to claim 1, it is characterised in that the light scattering module (7)
For seal cavity, it is clear opening or taper hole that it, which measures gas channel entrance, and a diameter of 2~15mm, the gas flow passed through is 0.5
~5L/min.
8. a kind of particulate matter continuous monitoring method according to claim 1, it is characterised in that the light scattering module (7)
Part, LED or laser tube that the luminous component is 650nm are nursed one's health including luminous component, receiving part, lens and circuit.
9. a kind of particulate matter continuous monitoring method according to claim 1, it is characterised in that the trace oscillating balance method
Quality detection module (12) includes：Cone-shaped glass oscillating tube in constant temperature cavity, the sampling for gathering tested particulate matter
Filter membrane and driving coil and Hall sensor, wherein, the constant temperature point of the constant temperature cavity is located between 10~50 DEG C, its constant temperature
Stability is not less than 0.05 DEG C, and stability of flow degree is not less than 0.01L/min.
10. a kind of particulate matter continuous monitoring method according to claim 1, it is characterised in that pass through the drier (6)
Dry gas stream passage blowback air-flow (10,11) vacuum in more than 20kPa, pass through the drier (6) sampling air flow
The dew point of the measurement air-flow (4) of passage is provided with constant humidity heater below -2 DEG C, and in drier (6) air inlet, makes entrance
The air-flow relative humidity of drier is less than 50%.
11. a kind of particulate matter continuous monitoring method according to claim 1, it is characterised in that the constant temperature filter (9)
Freezed using diode mode or heated, and thermostatic control is carried out using pid algorithm, its refrigerated constant temperature temperature is 2~10
DEG C, heating-up temperature is 30~70 DEG C.
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| US10571446B2 (en) | 2017-04-27 | 2020-02-25 | International Business Machines Corporation | Data quality control using a correlated sensor group |
| CN107607449A (en) * | 2017-08-21 | 2018-01-19 | 黑龙江科技大学 | A kind of device and method for detecting particulate matter quality concentration |
| CN107966332A (en) * | 2017-11-21 | 2018-04-27 | 宇星科技发展(深圳)有限公司 | Particulate matter detection means and its circuit |
| CN109406133B (en) * | 2018-12-11 | 2020-07-17 | 九川真空科技成都有限公司 | Method for detecting falling quantity of particles in valve working process |
| CN113324885B (en) * | 2021-05-21 | 2023-08-11 | 河南建筑职业技术学院 | Gardens greenery patches air particulate matter detects and early warning device |
| CN114018777B (en) * | 2021-11-05 | 2022-12-09 | 中国石油大学(北京) | Device for detecting concentration of particulate matters in high-temperature gas |
| CN114018776A (en) * | 2021-11-05 | 2022-02-08 | 中国石油大学(北京) | Detection apparatus for particulate matter in high-pressure gas pipeline |
| CN115728120A (en) * | 2022-11-11 | 2023-03-03 | 山东大学 | Dilution cooling device and particulate matter measurement system |
| CN117169070B (en) * | 2023-09-11 | 2024-04-05 | 中国矿业大学 | Self-calibration dust concentration online detector and working method |
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| CN201355339Y (en) * | 2008-07-18 | 2009-12-02 | 上海市计量测试技术研究院 | Calibration device of automatic atmospheric particulate matter monitoring system |
| DE102011002421A1 (en) * | 2011-01-04 | 2012-07-05 | Robert Bosch Gmbh | Measuring device for measuring particle concentrations by means of scattered light and method for monitoring the measuring device |
| CN202119689U (en) * | 2011-06-02 | 2012-01-18 | 广东省环境监测中心 | Quasi constant weight weighing device for monitoring mass concentration of atmospheric particulate matter in oscillation balance method |
| CN204008363U (en) * | 2014-08-15 | 2014-12-10 | 武汉市天虹仪表有限责任公司 | A kind of particle continuous monitoring device |
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