CN104132863A - Continuous monitoring device and continuous monitoring method for particulate matters - Google Patents
Continuous monitoring device and continuous monitoring method for particulate matters Download PDFInfo
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- CN104132863A CN104132863A CN201410403117.4A CN201410403117A CN104132863A CN 104132863 A CN104132863 A CN 104132863A CN 201410403117 A CN201410403117 A CN 201410403117A CN 104132863 A CN104132863 A CN 104132863A
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Abstract
The invention relates to a fine particle monitor, belongs to the field of environment monitoring, and particularly relates to a continuous monitoring device for particulate matters by fusing a tapered element oscillating microbalance method and a light scattering method. Based on the tapered element oscillating microbalance method, the light scattering method is used for measuring the concentration of particulate matters; the concentration measured by the tapered element oscillating microbalance method is used as a standard concentration to correct scattering concentration in real time; the concentration measured by the light scattering method is used as real-time supplementation of data of the tapered element oscillating microbalance method and is used as an evidence for judging whether measurement data of the tapered element oscillating microbalance method is abnormal or not. According to the continuous monitoring device, the measurement of the concentration of volatile particulate matters is realized and the problem that the data cannot be continuously sampled is solved; particularly, the influences of environmental interferences on the concentration measurement data are avoided, the accuracy of the concentration measurement of an instrument is guaranteed, and the reliability of stable operation of the instrument is improved.
Description
Technical field
The present invention relates to a kind of fine particle monitor, belong to environmental monitoring field, be specifically related to the particle continuous monitoring device that a kind of micro-oscillating balance method and light scattering method merge.
Background technology
Atmospheric particulates automonitor based on micro-oscillating balance method is very general in national application at present, and product is mainly the 1405F type instrument of U.S. ThermoScientific company.This instrument, based on micro-oscillating balance method, has increased FDMS device.This device is used timesharing to replace Fundamentals of Measurement concentration and reference concentration, then both are subtracted each other and obtain ultimate density.Use this device can reduce preferably volatile matter and half volatile material to measuring the impact of concentration, but in use because timesharing replaces Fundamentals of Measurement concentration and reference concentration, produced and measure discontinuous and long new problem stabilization time.
Due to micro-oscillating balance method be by vibration frequency signal detect quality, and in monitoring station, there is the vibration of aspiration pump, staff's activity and the ground factor such as built on the sand,, often there is abnormal concentration numerical value in the irregular oscillation stress direct interference instrument producing.
Summary of the invention
The present invention solves that existing timesharing in prior art replaces that irregular oscillation stress that problem that measurement that Fundamentals of Measurement concentration and reference concentration produce can not be continuous and instrument operational process exist causes interference to instrument and the problem that causes abnormal concentrations data, a kind of particle continuous monitoring device and method are provided, these apparatus and method have not only realized the measurement function of volatility concentration, but also solved the problem that in volatility measurement of concetration process, data can not be continuous, reduced the impact of environmental interference on concentration measurement data, accuracy and the reliability of apparatus measures data have been improved, expanded the environmental suitability of instrument operation.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals:
A kind of particle continuous monitoring device, comprise: sampling entrance, cutter for particles, exsiccator, light scattering module, T-valve, micro-oscillating balance method quality detection module, flow-control module, wherein: described sampling entrance, cutter for particles, exsiccator are connected successively; The first port of described T-valve communicates with light scattering module, and the second port is connected with the inlet end of micro-oscillating balance method quality detection module, and the 3rd port is connected with the second port by constant temperature filter;
Described exsiccator divides inside and outside two-layer, internal layer is provided with sampling air flow passage, skin is provided with dry gas stream passage, described sampling air flow passage communicates with the gas channel of described cutter for particles, the inlet end of described dry gas stream passage communicates with the outlet side of described sedimentation balance method quality detection module by the dry gas stream control module in air flow rate control module, and the outlet side of described dry gas stream passage is connected with aspiration pump; Institute's light scattering module is on the passage between exsiccator and T-valve.
Optimize, above-mentioned a kind of particle continuous monitoring device, also comprise a minute flow adapter, the inlet end of described minute flow adapter is connected with the outlet side of described cutter for particles, within described minute, the main outlet side of flow adapter is connected with the inlet end of described exsiccator, and the bypass outlet side of described minute flow adapter is connected with described aspiration pump by the auxiliary gas circuit flow controlling unit in auxiliary gas circuit grade one filter and air flow rate control module.
Optimize, above-mentioned a kind of particle continuous monitoring device, the gas flow of described sampling entrance is 1～16.67L/min, the gas flow of the main outlet side of described minute flow adapter is 0.5～5L/min.
Optimize, above-mentioned a kind of particle continuous monitoring device, described light scattering module is seal chamber, and it measures gas channel entrance is clear opening or taper hole, and diameter is 2～15mm, and the gas flow passing through is 0.5～5L/min.
Optimize, above-mentioned a kind of particle continuous monitoring device, described light scattering module comprises luminous component, receiving-member, lens and circuit conditioning part, LED lamp or laser tube that described luminous component is 650nm.
Optimize, above-mentioned a kind of particle continuous monitoring device, described micro-oscillating balance method quality detection module comprises: the cone-shaped glass oscillating tube that is arranged in constant temperature cavity, for gathering the sampling membrane of tested particle, adopt and drive coil and Hall element, wherein, the constant temperature of described constant temperature cavity is o'clock between 10～50 ℃, and its constant temperature degree of stability is not less than 0.05 ℃, and stability of flow degree is not less than 0.01L/min.
Optimize, above-mentioned a kind of particle continuous monitoring device, the vacuum tightness of the blowback air-flow of the dry gas stream passage of described exsiccator is more than 20kPa, and the dew point of the measurement air-flow by described exsiccator sampling air flow passage is below-2 ℃, and at exsiccator air intake opening, be provided with constant humidity well heater, make the air-flow relative humidity that enters exsiccator lower than 50%.
Optimize, above-mentioned a kind of particle continuous monitoring device, described constant temperature filter is used diode mode freeze or heat, and utilizes pid algorithm to carry out thermostatic control, and its refrigerated constant temperature temperature is 2～10 ℃, and heating-up temperature is 30～70 ℃.
Utilize above-mentioned particle continuous monitoring device to carry out a particle method for monitoring continuously, comprising:
Measuring state detecting step, whether detection system is in effective measuring state, under described effective measuring state, the dew point of the measurement air-flow after exsiccator is in steady state (SS), the flow that flow controlling unit measurement measures is simultaneously all in steady state (SS), the constant temperature of trace oscillating balance method quality detection module is in steady state (SS), and frequency signal is in steady state (SS);
Relation function matching step, under effective measuring state, the particle concentration measuring according to many groups of micro-oscillating balance method quality detection module and the particle concentration matching measuring with time light scattering module obtain the effective concentration relation function between oscillating balance method particle effective concentration and the loose color method particle concentration of light;
Non-steady state measuring process, under the state of flow controlling unit and exsiccator steady operation, when if the temperature of micro-oscillating balance method quality detection module or quality testing signal are not stablized, the particle concentration measuring according to light scattering module and described effective concentration relation function calculate the effective concentration that micro-oscillating balance method quality detection module is measured.
Optimize, above-mentioned a kind of particle is the method for monitoring continuously, and described relation function matching step further comprises:
Base concentration is measured sub-step, opens the first port and second port of T-valve, closes the 3rd port, makes T-valve work in A condition, and now, the particle concentration that light scattering module measures is light scattering base concentration CL
base, the particle concentration that micro-oscillating balance method quality detection module measures is oscillating balance base concentration C
base;
Reference concentration is measured sub-step, opens the first port and the 3rd port of T-valve, closes the second port, makes T-valve work in B state now, and now, the particle concentration that light scattering module measures is light scattering reference concentration CL
ref, the particle concentration that micro-oscillating balance method quality detection module measures is oscillating balance reference concentration C
ref;
Correction data obtains sub-step, based on formula C
a=C
base-C
refcalculate the effective concentration C of oscillating balance when A condition
a, wherein: C
basefor oscillating balance Fundamentals of Measurement concentration, C
reffor oscillating balance reference concentration, according to light scattering base concentration CL
base, oscillating balance effective concentration C
abuild a plurality of effective correction datas to { CL
base, C
a;
Relation function matching sub-step, repeats that basic measurement of concetration sub-step, reference concentration are measured sub-step, correction data obtains sub-step, obtains a plurality of effective correction datas to { CL
base, C
a, and according to effective correction data, matching is obtained reflecting the effective concentration C of oscillating balance when the A condition
awith light scattering base concentration CL
basethe effective concentration relation function C of relation
a=F (CL
base);
Optimize, above-mentioned a kind of particle is the method for monitoring continuously, also comprises:
Effectively reference concentration calculates sub-step, by described effective concentration relation function, calculates the effective concentration C of micro-oscillating balance method quality detection module (12) when the T-valve B state
b=F (CL
ref).
Optimize, above-mentioned a kind of particle is the method for monitoring continuously, in described non-steady state measuring process based on formula C
a=F (CL
base) calculate the effective concentration of micro-oscillating balance method quality detection module (12) when A condition, wherein CL
basethe particle concentration measuring for light scattering module (7).
Therefore, tool of the present invention has the following advantages: 1. realize continuous coverage, not only realized the measurement function of volatility concentration, also solved the problem that in volatility measurement of concetration process, data can not be continuous; 2. data are more reliable, solved the impact of environmental interference on concentration measurement data, improved accuracy and the reliability of apparatus measures data; 3. range of application is wider, has expanded the environmental suitability of instrument operation.
Accompanying drawing explanation
Accompanying drawing 1 is structural drawing of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.In figure, sampling entrance 1, cutter for particles 2, divide flow adapter 3, measure air-flow 4, auxiliary air-flow 5, exsiccator 6, light scattering module 7, T-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 grade one filter 13, air flow rate control module 14, aspiration pump 15, dry gas stream control module 16, auxiliary gas circuit flow controlling unit 17.
Embodiment:
As shown in Figure 1, a kind of particle continuous monitoring device, comprising: sampling entrance 1, cutter for particles 2, minute flow adapter 3, exsiccator 6, light scattering module 7, T-valve 8, constant temperature filter 9, trace oscillating balance method quality detection module 12, auxiliary gas circuit grade one filter 13, air flow rate control module 14, aspiration pump 15, dry gas stream control module 16, auxiliary gas circuit flow controlling unit 17.
Sampling entrance 1 is connected with cutter for particles 2.Divide the inlet end of flow adapter 3 to be connected with the outlet side of cutter for particles 2, divide the main outlet side of flow adapter 3 to be connected with the inlet end of exsiccator 6, the bypass outlet side of minute flow adapter 3 is connected with piston type or rotary vane type aspiration pump 15 by the auxiliary gas circuit flow controlling unit 17 in auxiliary gas circuit grade one filter 13 and air flow rate control module 14.
Wherein, the gas flow of sampling entrance 1 is designed to 1～16.67L/min, and the gas flow of the main outlet side of minute flow adapter 3 is designed to 0.5～5L/min; Flow controlling unit 14 service property (quality) flow sensors detect respectively measures air-flow 4 and auxiliary air-flow 5, and usage ratio valve is controlled flow respectively, and wherein auxiliary air-flow 5 also can be used turbine type or plate hole formula gas flow sensor to carry out flow detection.
T-valve 8 is the electrical ball valve that reducing motor drives or pushes away valve, also can use pneumatic ball valve or push away valve.Its first port communicates with exsiccator 6, and the second port is connected with the inlet end of micro-oscillating balance method quality detection module 12, and the 3rd port is connected with the second port by constant temperature filter 9.Wherein, constant temperature filter 9 is used diode mode freeze or heat, and utilizes pid algorithm to carry out thermostatic control, and its refrigerated constant temperature temperature is 2～10 ℃, and heating-up temperature is 30～70 ℃.
Exsiccator 6 uses the isolation of Nafion diaphragm inside and outside two-layer, is board-like or tube designs.Internal layer is provided with sampling air flow passage, and skin is provided with dry gas stream passage, and tow channel gas flow path direction is contrary or vertical; Sampling air flow passage communicates with the gas channel of cutter for particles 2, the inlet end of dry gas stream passage communicates with the outlet side of sedimentation balance method quality detection module 12 by the dry gas stream control module 16 in air flow rate control module 14, and the outlet side of dry gas stream passage is connected with aspiration pump 15.
Adopt after said structure, measure air-flow 4 and as blowback inlet air flow 10, enter exsiccator 6 with flow controlling unit 14 is rear by micro-oscillating balance method quality testing unit 12, from exsiccator 6, as blowback, go out gas circuit 11 out, finally import aspiration pump 15.Wherein: the blowback air-flow 10 of the dry gas stream passage by exsiccator 6 and 11 vacuum tightness are more than 20kPa, and the dew point of the measurement air-flow 4 by exsiccator 6 sampling air flow passages is below-2 ℃.
Trace oscillating balance method quality detection module 12 comprises: the cone-shaped glass oscillating tube that is arranged in constant temperature cavity, for gathering the sampling membrane of tested particle, adopt, wherein, the constant temperature of constant temperature cavity is o'clock between 10～50 ℃, its constant temperature degree of stability is not less than 0.05 ℃, and stability of flow degree is not less than 0.01L/min.
Diffuse transmission module 7 is on the circulation road between exsiccator 6 and T-valve 8.This light scattering module 7 is seal chamber and comprises: luminous component, receiving-member, lens and circuit conditioning part, LED lamp or laser tube that wherein luminous component is 650nm, it measures gas channel entrance is clear opening or taper hole, diameter is 2～15mm, and the gas flow passing through is 0.5～5L/min.
In the present embodiment, continuously the method for monitoring is as follows to carry out particle:
First judge that whether detection system is in effective measuring state, under effective measuring state, the dew point of the measurement air-flow 4 after exsiccator 6 is in steady state (SS), control simultaneously measurement air-flow 4 that control module 14 measures with the flow of auxiliary air-flow 5 in steady state (SS).
Under effective measuring state, if micro-oscillating balance method quality detection module 12 is in stablizing work state, the particle concentration measuring according to the micro-oscillating balance method quality detection module 12 of many groups and the particle concentration matching measuring with time light scattering module 7 obtain the effective concentration relation function between oscillating balance method particle effective concentration and the loose color method particle concentration of light, specifically comprise:
Base concentration is measured sub-step, opens the first port and second port of T-valve 8, closes the 3rd port, makes T-valve 8 work in A condition, and now, the particle concentration that light scattering module 7 measures is the loose color base plinth concentration C L of light
base, the particle concentration that micro-oscillating balance method quality detection module 12 measures is oscillating balance base concentration C
base;
Reference concentration is measured sub-step, opens the first port and the 3rd port of T-valve 8, closes the second port, makes T-valve 8 work in B state now, and now, the particle concentration that light scattering module 7 measures is the loose look reference concentration CL of light
ref, the particle concentration that micro-oscillating balance method quality detection module 12 measures is oscillating balance reference concentration C
ref;
Correction data obtains sub-step, based on formula C
a=C
base-C
refcalculate the effective concentration C of oscillating balance when A condition
a, wherein: C
basefor oscillating balance Fundamentals of Measurement concentration, C
reffor oscillating balance reference concentration, according to the loose color base plinth concentration C L of light
base, oscillating balance effective concentration C
abuild a plurality of effective correction datas to { CL
base, C
a;
Relation function matching sub-step, repeats that basic measurement of concetration sub-step, reference concentration are measured sub-step, correction data obtains sub-step, obtains a plurality of effective correction datas to { CL
base, C
a, and according to effective correction data, matching is obtained reflecting the effective concentration C of oscillating balance when the A condition
awith the loose color base plinth concentration C L of light
basethe effective concentration relation function C of relation
a=F (CL
base);
Effectively reference concentration calculates sub-step, by effective concentration relation function, calculates the effective concentration C of micro-oscillating balance method quality detection module 12 when the T-valve B state
b=F (CL
ref).
By above-mentioned steps, realized the continuity of sampled concentrations data: when T-valve works in A condition, the effective concentration in the time of can obtaining B state according to function F; Same, when T-valve works in B state, the effective concentration in the time of can obtaining A condition according to function F.
Under effective measuring state, if when the temperature of micro-oscillating balance method quality detection module 12 or quality testing signal are not stablized, micro-oscillating balance method quality testing unit 12 concentration C of surveying
ainvalid, available last time, gained funtcional relationship was by light scattering module 7 concentration C L
basetry to achieve C
a=F (CL
base).Because the stabilized speed of flow and dew point is very fast, constant temperature and quality testing signal stabilization speed are very slow, by the method, supplemented the concentration data of micro-oscillating balance method quality testing unit 12, the method also can be when instrument be disturbed by external vibration, temperature stress trace oscillating balance method quality testing unit 12 break down or use when abnormal, also can be by C
a=F (CL
base) as micro-oscillating balance method quality testing unit 12 measured C
athe foundation of abnormal judgement.
Utilize the present embodiment to carry out particle concentration when monitoring, the concentration that the micro-oscillating balance method of usining is surveyed is as normal concentration, real time correction light scattering concentration; Can utilize simultaneously concentration that light scattering method is surveyed as micro-oscillating balance method the data filling in instrument preheating, while measuring intermittence and fault, and as the whether abnormal basis for estimation of micro-oscillating balance method measurement data.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used sampling entrance 1 herein, cutter for particles 2, minute flow adapter 3, measure air-flow 4, auxiliary air-flow 5, exsiccator 6, light scattering module 7, T-valve 8, constant temperature filter 9, blowback air-flow 10,11, micro-oscillating balance method quality detection module 12, auxiliary gas circuit grade one filter 13, air flow rate control module 14, aspiration pump 15, dry gas stream control module 16, auxiliary gas circuit flow controlling unit 17 terms such as grade, but do not get rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (12)
1. a particle continuous monitoring device, it is characterized in that, comprise: sampling entrance (1), cutter for particles (2), exsiccator (6), light scattering module (7), T-valve (8), micro-oscillating balance method quality detection module (12), flow-control module (14), wherein:
Described sampling entrance (1), cutter for particles (2), exsiccator (6) are connected successively;
The first port of described T-valve (8) communicates with light scattering module (7), and the second port is connected with the inlet end of micro-oscillating balance method quality detection module (12), and the 3rd port is connected with the second port by constant temperature filter (9);
Described exsiccator (6) divides inside and outside two-layer, internal layer is provided with sampling air flow passage, skin is provided with dry gas stream passage, described sampling air flow passage communicates with the gas channel of described cutter for particles (2), the inlet end of described dry gas stream passage communicates with the outlet side of described sedimentation balance method quality detection module (12) by the dry gas stream control module (16) in air flow rate control module (14), and the outlet side of described dry gas stream passage is connected with aspiration pump (15);
Institute's light scattering module (7) is positioned on the passage between exsiccator (6) and T-valve (8).
2. a kind of particle continuous monitoring device according to claim 1, it is characterized in that, also comprise a minute flow adapter (3), described minute flow adapter (3) inlet end be connected with the outlet side of described cutter for particles (2), within described minute, the main outlet side of flow adapter (3) is connected with the inlet end of described exsiccator (6), described minute flow adapter (3) bypass outlet side by the auxiliary gas circuit flow controlling unit (17) in auxiliary gas circuit grade one filter (13) and air flow rate control module (14), be connected with described aspiration pump (15).
3. a kind of particle continuous monitoring device according to claim 2, is characterized in that, the gas flow of described sampling entrance (1) is 1～16.67L/min, described minute flow adapter (3) the gas flow of main outlet side be 0.5～5L/min.
4. a kind of particle continuous monitoring device according to claim 1, it is characterized in that, described light scattering module (7) is seal chamber, and it measures gas channel entrance is clear opening or taper hole, diameter is 2～15mm, and the gas flow passing through is 0.5～5L/min.
5. a kind of particle continuous monitoring device according to claim 1, is characterized in that, described light scattering module (7) comprises luminous component, receiving-member, lens and circuit conditioning part, LED lamp or laser tube that described luminous component is 650nm.
6. a kind of particle continuous monitoring device according to claim 1, it is characterized in that, described micro-oscillating balance method quality detection module (12) comprising: the cone-shaped glass oscillating tube that is arranged in constant temperature cavity, for gathering sampling membrane and drive coil and the Hall element of tested particle, wherein, the constant temperature of described constant temperature cavity is o'clock between 10～50 ℃, and its constant temperature degree of stability is not less than 0.05 ℃, and stability of flow degree is not less than 0.01L/min.
7. a kind of particle continuous monitoring device according to claim 1, it is characterized in that, the blowback air-flow (10 of the dry gas stream passage by described exsiccator (6), 11) vacuum tightness is more than 20kPa, the dew point of the measurement air-flow (4) by described exsiccator (6) sampling air flow passage is below-2 ℃, and at exsiccator (6) air intake opening, be provided with constant humidity well heater, make the air-flow relative humidity that enters exsiccator lower than 50%.
8. a kind of particle continuous monitoring device according to claim 1, it is characterized in that, described constant temperature filter (9) is used diode mode freeze or heat, and utilizes pid algorithm to carry out thermostatic control, its refrigerated constant temperature temperature is 2～10 ℃, and heating-up temperature is 30～70 ℃.
9. utilize the arbitrary particle continuous monitoring device described in claim 1-8 to carry out a particle method for monitoring continuously, it is characterized in that, comprising:
Measuring state detecting step, whether detection system is in effective measuring state, under described effective measuring state, the dew point of the measurement air-flow (4) after exsiccator (6) is in steady state (SS), the flow that flow controlling unit measurement (14) measures is simultaneously all in steady state (SS), the constant temperature of trace oscillating balance method quality detection module (12) is in steady state (SS), and frequency signal is in steady state (SS);
Relation function matching step, under effective measuring state, the particle concentration measuring according to many groups of micro-oscillating balance method quality detection module (12) and the particle concentration matching measuring with time light scattering module (7) obtain the effective concentration relation function between oscillating balance method particle effective concentration and the loose color method particle concentration of light;
Non-steady state measuring process, under the state of flow controlling unit (14) and exsiccator (6) steady operation, when if the temperature of micro-oscillating balance method quality detection module (12) or quality testing signal are not stablized, the particle concentration measuring according to light scattering module (7) and described effective concentration relation function calculate the effective concentration that micro-oscillating balance method quality detection module (12) is measured.
10. the method that a kind of particle according to claim 9 is monitored continuously, is characterized in that, described relation function matching step further comprises:
Base concentration is measured sub-step, open the first port and second port of T-valve (8), close the 3rd port, make T-valve (8) work in A condition, now, the particle concentration that light scattering module (7) measures is light scattering base concentration CL
base, the particle concentration that micro-oscillating balance method quality detection module (12) measures is oscillating balance base concentration C
base;
Reference concentration is measured sub-step, open the first port and the 3rd port of T-valve (8), close the second port, make T-valve (8) work in B state now, now, the particle concentration that light scattering module (7) measures is light scattering reference concentration CL
ref, the particle concentration that micro-oscillating balance method quality detection module (12) measures is oscillating balance reference concentration C
ref;
Correction data obtains sub-step, based on formula C
a=C
base-C
refcalculate the effective concentration C of oscillating balance when A condition
a, wherein: C
basefor oscillating balance Fundamentals of Measurement concentration, C
reffor oscillating balance reference concentration, according to light scattering base concentration CL
base, oscillating balance effective concentration C
abuild a plurality of effective correction datas to { CL
base, C
a;
Relation function matching sub-step, repeats that basic measurement of concetration sub-step, reference concentration are measured sub-step, correction data obtains sub-step, obtains a plurality of effective correction datas to { CL
base, C
a, and according to effective correction data, matching is obtained reflecting the effective concentration C of oscillating balance when the A condition
awith light scattering base concentration CL
basethe effective concentration relation function C of relation
a=F (CL
base).
11. a kind of particles according to claim 10 are the method for monitoring continuously, it is characterized in that, also comprises:
Effectively reference concentration calculates sub-step, by described effective concentration relation function, calculates the effective concentration C of micro-oscillating balance method quality detection module (12) when the T-valve B state
b=F (CL
ref).
12. a kind of particles according to claim 10 are the method for monitoring continuously, it is characterized in that, in described non-steady state measuring process based on formula C
a=F (CL
base) calculate the effective concentration of micro-oscillating balance method quality detection module (12) when A condition, wherein CL
basethe particle concentration measuring for light scattering module (7).
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| 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 |
| CN109406133A (en) * | 2018-12-11 | 2019-03-01 | 九川真空科技成都有限公司 | Particle falls off the method for quantity during a kind of detection valve working |
| US10571446B2 (en) | 2017-04-27 | 2020-02-25 | International Business Machines Corporation | Data quality control using a correlated sensor group |
| CN113324885A (en) * | 2021-05-21 | 2021-08-31 | 河南建筑职业技术学院 | Gardens greenery patches air particulate matter detects and early warning device |
| 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 |
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