CN103760079A - dust tester calibration method and system - Google Patents
dust tester calibration method and system Download PDFInfo
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- CN103760079A CN103760079A CN201410035645.9A CN201410035645A CN103760079A CN 103760079 A CN103760079 A CN 103760079A CN 201410035645 A CN201410035645 A CN 201410035645A CN 103760079 A CN103760079 A CN 103760079A
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- 239000000428 dust Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 128
- 238000005070 sampling Methods 0.000 claims abstract description 111
- 238000002156 mixing Methods 0.000 claims abstract description 31
- 238000004364 calculation method Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 73
- 238000004164 analytical calibration Methods 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000013618 particulate matter Substances 0.000 abstract 4
- 239000000203 mixture Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
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Abstract
The invention discloses a calibration method and a calibration system for a dust tester, wherein the calibration system for the dust tester comprises the following steps: the dust mixing device is used for obtaining mixed gas with uniformly distributed particles; and the sampling calibration device is used for carrying out sampling calculation on the mixed gas to obtain first particulate matter concentration, and carrying out operation processing on the first particulate matter concentration and the second particulate matter concentration detected and displayed by the mixed gas according to the first particulate matter concentration and the to-be-calibrated dust tester to obtain the relative error of the to-be-calibrated dust tester. The invention can ensure the accuracy and traceability of the tested dust tester.
Description
Technical field
The present invention relates to measuring technique, relate in particular to a kind of Dust Testing Instrument calibration steps and system.
Background technology
Dust Testing Instrument is for detection of the instrument and equipment of the particle concentration in air ambient, the accuracy of Dust Testing Instrument and traceability have material impact to the evaluation level of quality of air environment, traceability can guarantee that the precision of measuring can follow the trail of to generally acknowledged witness mark source, for Dust Testing Instrument, the test data that refers to Dust Testing Instrument is to be traceable to the most basic weight method.Owing to clearly not stipulating in prior art that how Dust Testing Instrument is carried out to assay calibration, make Dust Testing Instrument accomplish that magnitude tracing has certain difficulty accurately, therefore, for strengthening accuracy and the traceability of Dust Testing Instrument, be necessary to provide a kind of Dust Testing Instrument calibration system, so that Dust Testing Instrument is demarcated and to be calibrated.
Summary of the invention
The invention provides a kind of Dust Testing Instrument calibration steps and system, to guarantee accuracy and the traceability of tested Dust Testing Instrument.
One aspect of the present invention provides a kind of Dust Testing Instrument calibration steps, comprising:
Obtain the uniform mixed gas of Particle distribution;
Utilize sampling apparatus to sample to described mixed gas, obtain the first particle concentration that sampling apparatus measures, and within the sampling time identical with described sampling apparatus, utilize Dust Testing Instrument to be calibrated to detect described mixed gas, obtain the second particle concentration that Dust Testing Instrument to be calibrated shows;
Described the first particle concentration and the second particle concentration are carried out to calculation process, obtain the relative error of Dust Testing Instrument to be calibrated.
The present invention provides a kind of Dust Testing Instrument calibration system on the other hand, comprising:
Mix dust device, for obtaining the uniform mixed gas of Particle distribution;
Sampling calibrating installation, for the first particle concentration that described mixed gas is sampled and calculated, and carry out calculation process according to the second particle concentration that described the first particle concentration and Dust Testing Instrument to be calibrated are carried out to detection display to described mixed gas, obtain the relative error of Dust Testing Instrument to be calibrated.
The present invention, by obtain the equally distributed mixed gas of particle by mix dust device, makes particle diameter and the concentration homogeneity of tested particle, has guaranteed the accuracy of calibration; The weight method that in sampling calibrating installation, sampling apparatus adopts is obtained the concentration of particle, guaranteed the traceability of Dust Testing Instrument calibration to be calibrated, accuracy and the traceability of the relative error of the Dust Testing Instrument that therefore, the present embodiment calculating is obtained can access effective assurance.
Accompanying drawing explanation
Fig. 1 is the structural representation of Dust Testing Instrument calibration system embodiment of the present invention;
Fig. 2 is the vertical view of blending bin in Fig. 1;
Fig. 3 is the structural representation of Calibration Box in Fig. 1;
Fig. 4 is the process flow diagram of Dust Testing Instrument calibration steps embodiment provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
Fig. 1 is the structural representation of Dust Testing Instrument calibration system embodiment provided by the invention, as shown in Figure 1, and the system of the present embodiment, comprise: mix dust device 100 and sampling calibrating installation 200, wherein, mix dust device 100, for obtaining the uniform mixed gas of Particle distribution; Sampling calibrating installation 200, for the first particle concentration that described mixed gas is sampled and calculated, and carry out calculation process according to the second particle concentration that described the first particle concentration and Dust Testing Instrument to be calibrated are carried out to detection display to described mixed gas, obtain the relative error of Dust Testing Instrument to be calibrated.
In the present embodiment, mix dust device 100 can produce the uniform mixed gas of Particle distribution, for sampling calibrating installation 200 and Dust Testing Instrument to be calibrated to this mixed gas concentration of particle tested thing of sampling, thereby calculate the relative error of Dust Testing Instrument to be calibrated.
In the present embodiment, mix dust device 100 comprises: filtrator 1, the first variable valve 2, the second variable valve 3, flowmeter 4, particle generator 5 and blending bin 8, the second variable valve 3, flowmeter 4, particle generator 5 and blending bin 8 are connected successively, filtrator 1, for air is filtered, obtain fresh air; The first variable valve 2, is connected with blending bin 8 with filtrator 1 respectively, controls the amount of fresh air of injecting blending bin 8, the concentration of particle in mixed mixed gas in blending bin 8 is adjusted to the concentration range of Dust Testing Instrument to be calibrated for regulating; The second variable valve 3, controls for regulating the amount of fresh air of injecting particle generator 5; Flowmeter 4, for recording the amount of fresh air size of injecting particle generator 5; Particle generator 5, for generation of the particle gas that comprises predetermined concentration and particle diameter; In concrete application, predetermined concentration and particle diameter can be set according to the particle size range of Dust Testing Instrument to be calibrated and concentration range, this particle concentration is greater than the concentration range of Dust Testing Instrument to be calibrated conventionally, the particle diameter of this particle is generally positioned at the particle size range of Dust Testing Instrument to be calibrated, blending bin 8, for the particle gas of the fresh air injecting by the first variable valve 2 and particle generator 5 generations is carried out to even hybrid processing, obtain the uniform mixed gas of Particle distribution.In practical application, by regulating the second variable valve 3, can control concentration and particle diameter that particle generator 5 produces predetermined particle, by the first variable valve 2, control and enter the amount of fresh air in blending bin 8 again, to produce, meet the particle size range of Dust Testing Instrument to be calibrated and the equally distributed mixed gas of the particle of concentration range.Between above-mentioned the first variable valve 2 and blending bin 8, can be connected by conduit 6, conduit 6 can be plexi-glass tubular, also can be connecting hose, the body structure of blending bin 8 can adopt organic glass to make, particle generator 5 generations have certain density particle and also by conduit 7, inject blending bins 8 fully to mix with the fresh air injecting from conduit 6, and mixed mixed gas injects Calibration Boxes 10 by conduit 9.
Sampling calibrating installation 200 comprises: Calibration Box 10, sampling apparatus 16 and the sampling pipe 14 being connected with Dust Testing Instrument to be calibrated, Calibration Box 10 is communicated with described blending bin 8, can pass through conduit 9, as soft pipe connection in concrete application.Described sampling pipe 14, on being located at the bottom of the case of described Calibration Box 10, one end and described interior connection of Calibration Box 10, the other end is connected with Dust Testing Instrument 15 to be calibrated, for the mixed gas in Calibration Box 10 is sampled, so that the second particle concentration of mixed gas described in Dust Testing Instrument detection display to be calibrated.Described sampling apparatus 16, on being arranged at the bottom of the case of described Calibration Box 10, be used for by described mixed gas is sampled and calculated the first particle concentration, sampling apparatus 16 comprises sampling thief 13 and has the funnel-shaped structure unit of tapering part and tubular portion, described tapering part is positioned at described blending bin 8, on described tubular portion is located at the bottom of the case of described Calibration Box 10, and be connected with described sampling thief 13, described tapering part inner side sets sampling cutting head 11 and sampling membrane 12 downwards successively from the cone end, sampling cutting head 11, for the test particle diameter of particle being required to control the particle particle diameter passing through according to Dust Testing Instrument to be calibrated, described sampling membrane 12 is for catching by the particle of sampling cutting head, sampling thief 13, for setting sampling time and the sampling flow that described mixed gas is sampled, sampling thief 13 adopts constant current sampling thief, to guarantee accuracy and the precision of Dust Testing Instrument reference-calibrating to be calibrated, improves accuracy and the traceability of calibration.
Fig. 2 is the vertical view of blending bin in Fig. 1, in this figure, in the gas inject blending bin 8 of carrying particle that conduit 7 produces particle generator 5 by blending bin 8 top center, conduit 6 injects blending bin 8 by three entrances by fresh air, these three entrances are evenly distributed on the top of blending bin 8 sidewalls, thereby can make particle and air be uniformly mixed, conduit 9 is arranged on the bottom of blending bin 8 sidewalls, so that mixed uniformly mixed gas is derived to blending bin 8.
Fig. 3 is the structural representation of Calibration Box in Fig. 1, in this figure, conduit 9 injects the mixed gas of deriving from blending bin 8 by the top of Calibration Box 10, the bottom of Calibration Box 10 arranges sampling pipe 14 and sampling apparatus 16, during installation, make the top of infundibulate sampling apparatus and the sampling pipe mouth of pipe in sustained height, guarantee that in the mixed gas of the two sampling, particle concentration is consistent.
The present embodiment obtains the equally distributed mixed gas of particle by mix dust device, makes particle diameter and the concentration homogeneity of tested particle, has guaranteed the accuracy of calibration; The weight method that in sampling calibrating installation, sampling apparatus adopts is obtained the concentration of particle, guaranteed the traceability of Dust Testing Instrument calibration to be calibrated, accuracy and the traceability of the relative error of the Dust Testing Instrument that therefore, the present embodiment calculating is obtained can access effective assurance.
Fig. 4 is the process flow diagram of Dust Testing Instrument calibration steps embodiment provided by the invention, and as shown in Figure 4, the method for the present embodiment can be carried out by above-mentioned system embodiment illustrated in fig. 1, and its execution step comprises:
In this step, mix dust device is by air filtration is obtained to fresh air, and the particle with finite concentration and particle diameter producing with particle generator fully mixes, and obtains the uniform mixed gas of Particle distribution.
Wherein, obtain the process of the uniform mixed gas of Particle distribution, can comprise: utilize particle generator to produce the particle gas that comprises predetermined concentration and particle diameter; The particle gas that particle generator is produced and process filtered air inject blending bin and carry out hybrid processing, obtain the uniform mixed gas of Particle distribution.
For Dust Testing Instrument is calibrated, need to there is the higher reference calibration equipment of precision and accuracy, in the present embodiment, utilize sampling apparatus 16 and Dust Testing Instrument to be calibrated respectively mixed gas to be sampled, sampling apparatus 16 is the weight change count particles substrate concentration before and after sampling by sampling membrane, in the mixed gas of the collection of Dust Testing Instrument to be calibrated, the concentration of particle can directly be read from instrument, thereby by can be calculated the relative error of Dust Testing Instrument to be calibrated.Higher for the relative error accuracy that makes to calculate, in actual applications, conventionally make sampling apparatus 16 and Dust Testing Instrument to be calibrated sample simultaneously.
Wherein, obtain the first particle concentration that sampling apparatus 16 measures, specifically comprise: sampling time and the sampling flow of setting sampling apparatus 16; Calculate sampling volume according to sampling time and sampling flow; Obtain the sampling membrane of sampling apparatus 16 in the weight change value of sampling front and back; According to the weight change value of described sampling volume and sampling membrane, calculate the first particle concentration.
Obtain respectively after the second particle concentration of the first particle concentration that sampling apparatus 16 measures and Dust Testing Instrument detection display to be calibrated, can carry out calculation process according to following formula, obtain the relative error of Dust Testing Instrument to be calibrated.
Wherein, Δ---relative error number percent;
C
b---Dust Testing Instrument records the mass concentration of the particle of demonstration, and unit is mg/m
3;
C
s---sampling apparatus records the mass concentration of particle, and unit is mg/m
3.
The mass concentration that records particle with sampling apparatus, computing formula is shown below.
Wherein, w
1---the quality of sampling membrane before sampling, unit is milligram (mg);
W
2---the quality of sampling post-sampling filter membrane, unit is milligram (mg);
V---gas production volume, unit is for rising (L).
In the embodiment of the present invention, for calculating the relative error of calibration different dusts tester, can be by adopting different sampling cutting heads to obtain, different-grain diameter dust to be gathered, therefore, utilize before 16 pairs of described mixed gass of sampling apparatus sample, can also comprise: according to Dust Testing Instrument to be calibrated, the test particle diameter of particle is required the sampling cutting head of configuration sampling apparatus, so that sampling membrane gathers the particle of described test particle diameter.
The method of the present embodiment can be carried out by above-mentioned system embodiment illustrated in fig. 1, and its principle of work and the technique effect reaching are similar, are no longer described in detail.
Claims (9)
1. a Dust Testing Instrument calibration steps, is characterized in that, comprising:
Obtain the uniform mixed gas of Particle distribution;
Utilize sampling apparatus to sample to described mixed gas, obtain the first particle concentration that sampling apparatus measures, and within the sampling time identical with described sampling apparatus, utilize Dust Testing Instrument to be calibrated to detect described mixed gas, obtain the second particle concentration that Dust Testing Instrument to be calibrated shows;
Described the first particle concentration and the second particle concentration are carried out to calculation process, obtain the relative error of Dust Testing Instrument to be calibrated.
2. method according to claim 1, is characterized in that, described in obtain the uniform mixed gas of Particle distribution, comprising:
Utilize particle generator to produce the particle gas that comprises predetermined concentration and particle diameter;
The particle gas that particle generator is produced and process filtered air inject blending bin and carry out hybrid processing, obtain the uniform mixed gas of Particle distribution.
3. method according to claim 1 and 2, is characterized in that, utilizes sampling apparatus to sample to described mixed gas, obtains the first particle concentration that sampling apparatus measures, and is specially:
Set sampling time and the sampling flow of sampling apparatus;
Calculate sampling volume according to sampling time and sampling flow;
Obtain the sampling membrane of sampling apparatus in the weight change value of sampling front and back;
According to the weight change value of described sampling volume and sampling membrane, calculate the first particle concentration.
4. method according to claim 3, is characterized in that, utilizes before sampling apparatus samples to described mixed gas, also comprises:
According to Dust Testing Instrument to be calibrated, the test particle diameter of particle is required the sampling cutting head of configuration sampling apparatus, so that sampling membrane gathers the particle of described test particle diameter.
5. a Dust Testing Instrument calibration system, is characterized in that, comprising:
Mix dust device, for obtaining the uniform mixed gas of Particle distribution;
Sampling calibrating installation, for the first particle concentration that described mixed gas is sampled and calculated, and carry out calculation process according to the second particle concentration that described the first particle concentration and Dust Testing Instrument to be calibrated are carried out to detection display to described mixed gas, obtain the relative error of Dust Testing Instrument to be calibrated.
6. system according to claim 5, it is characterized in that, described mix dust device comprises: filtrator, the first variable valve, the second variable valve, flowmeter, particle generator and blending bin, the second variable valve, flowmeter, particle generator and blending bin are connected successively
Described filtrator, for air is filtered, obtains fresh air;
The first variable valve, is connected with blending bin with filtrator respectively, for regulating, controls the amount of fresh air of injecting blending bin;
The second variable valve, controls for regulating the amount of fresh air of injecting particle generator;
Flowmeter, for recording the amount of fresh air size of injecting particle generator;
Particle generator, for generation of the particle gas that comprises predetermined concentration and particle diameter;
Described blending bin, for the particle gas of the fresh air injecting by the first variable valve and particle generator generation is carried out to even hybrid processing, obtains the uniform mixed gas of Particle distribution.
7. according to the system described in claim 5 or 6, it is characterized in that, described sampling calibrating installation comprises: Calibration Box, sampling apparatus and the sampling pipe being connected with Dust Testing Instrument to be calibrated,
Described Calibration Box, is communicated with described blending bin;
Described sampling apparatus, be arranged at the bottom of the case of described Calibration Box on, for by described mixed gas is sampled and is calculated the first particle concentration;
Described sampling pipe, on being located at the bottom of the case of described Calibration Box, one end is communicated with in described Calibration Box, and the other end is connected with Dust Testing Instrument to be calibrated, for the mixed gas in Calibration Box is sampled, so that the second particle concentration of mixed gas described in Dust Testing Instrument detection display to be calibrated.
8. system according to claim 7, it is characterized in that, described sampling apparatus comprises sampling thief and has the funnel-shaped structure unit of tapering part and tubular portion, described tapering part is positioned at described blending bin, on described tubular portion is located at the bottom of the case of described Calibration Box, and be connected with described sampling thief, described tapering part inner side sets sampling cutting head and sampling membrane downwards successively from the cone end, described sampling cutting head, for requiring to control to the test particle diameter of particle the particle particle diameter passing through according to Dust Testing Instrument to be calibrated; Described sampling membrane is for catching by the particle of sampling cutting head; Described sampling thief, for setting sampling time and the sampling flow that described mixed gas is sampled.
9. system according to claim 8, is characterized in that, described sampling thief is constant current sampling thief.
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| CN104111216A (en) * | 2014-06-18 | 2014-10-22 | 瑞曼博(北京)环保科技有限公司 | PM10/PM2.5 cutting head and filter membrane calibration system |
| CN104251809A (en) * | 2014-09-15 | 2014-12-31 | 天津开发区合普工贸有限公司 | High-precision steady calibration device for tiny solid particle aerosol |
| CN105043954A (en) * | 2015-08-27 | 2015-11-11 | 河南省计量科学研究院 | Calibration system and calibration method for digital dust meter |
| CN105299856A (en) * | 2014-07-23 | 2016-02-03 | 松下知识产权经营株式会社 | Air-conditioning equipment, method for using air-conditioning equipment , and dust detection method |
| CN105675461A (en) * | 2016-01-25 | 2016-06-15 | 上海滕维信息科技有限公司 | Calibration method of PM2.5 (particulate matter 2.5) detector |
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| CN107389515A (en) * | 2017-07-07 | 2017-11-24 | 深圳市建筑科学研究院股份有限公司 | Particulate matter sensors are demarcated and working characteristics parametric measurement device |
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| CN109142178A (en) * | 2018-10-26 | 2019-01-04 | 常熟市德虞矿山机电有限公司 | A kind of calibration method of direct-reading dust concentration detector |
| CN109765148A (en) * | 2018-11-16 | 2019-05-17 | 江苏日盈电子股份有限公司 | Test equipment, test macro and its test method |
| CN109444003A (en) * | 2018-11-16 | 2019-03-08 | 江苏日盈电子股份有限公司 | Test equipment and test method |
| CN109323968A (en) * | 2018-12-17 | 2019-02-12 | 北京理工大学 | A kind of calibration system and its method applied to dust cloud cluster distribution of concentration |
| CN109682731A (en) * | 2019-01-24 | 2019-04-26 | 珠海横琴博信能源建设有限公司 | A kind of thermal power plant dust concentration on-line monitoring system and method |
| CN109991138A (en) * | 2019-04-09 | 2019-07-09 | 上海北分科技股份有限公司 | It is a kind of to utilize dust wind tunnel system test method |
| CN109991138B (en) * | 2019-04-09 | 2021-06-11 | 上海北分科技股份有限公司 | Wind tunnel system testing method by using dust |
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| CN113237806B (en) * | 2021-07-12 | 2021-09-07 | 韦氏（苏州）医疗科技有限公司 | Medical environment logistics support monitoring system |
| CN113720738A (en) * | 2021-09-03 | 2021-11-30 | 上海交通大学 | Optimized calibration method for aerosol mass concentration |
| CN114813494A (en) * | 2022-06-24 | 2022-07-29 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Application of carbon nanospheres and calibration method of PM2.5 mass concentration determinator |
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