CN109540754A - A kind of Atmospheric particulates on-Line Monitor Device and method based on β ray method - Google Patents
A kind of Atmospheric particulates on-Line Monitor Device and method based on β ray method Download PDFInfo
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- CN109540754A CN109540754A CN201811619787.4A CN201811619787A CN109540754A CN 109540754 A CN109540754 A CN 109540754A CN 201811619787 A CN201811619787 A CN 201811619787A CN 109540754 A CN109540754 A CN 109540754A
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- 230000005250 beta ray Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 13
- 239000008187 granular material Substances 0.000 claims description 8
- 238000012937 correction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 239000013618 particulate matter Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of Atmospheric particulates on-Line Monitor Device and method based on β ray method, including sampler chamber and vacuum pump, described sampler chamber one end connects air inlet, and the other end connects gas outlet；The top of the sampler chamber connects detector, and its underpart connects beta ray source；Paper tape passes through sampler chamber, and between detector and beta ray source, described paper tape one end connects paper feed driving wheel, and the other end connects paper feed follower；The spot of the detector, beta ray source and paper tape is point-blank；The sampler chamber is also connected with pressure sensor and Temperature Humidity Sensor, and the probe of the pressure sensor and Temperature Humidity Sensor is located in sampler chamber.The present invention is changed by the temperature and pressure of monitoring sampler chamber, count compensation amendment is carried out to the variation of temperature and pressure respectively, to greatly improve the accuracy of particle concentration on-line measurement, have great importance to the On-line sampling system of atmosphere particle concentration.
Description
Technical field
The present invention relates to atmosphere on-line checking fields, more particularly to the Atmospheric particulates based on β ray method monitor dress on-line
It sets and method.
Background technique
The main reason for particulate matter in air is atmosphere pollution, especially PM10(diameter are less than or equal to 10 microns of
Grain object) and PM2.5(diameter less than or equal to 2.5 microns of particulate matter) pellet can impact the health of human body.
So the detection of Atmospheric Grains has important meaning to environmental improvement and protection human health.
β ray method is a kind of detection method based on attenuation.The energy when β ray, which passes through collection, the filter paper of particulate matter
Amount decaying, the probe value before and after energy attenuation is detected by detector, can calculate the concentration of particulate matter.With to particle
The requirement of object monitoring data real-time is higher and higher, needs while acquiring particulate matter, with β ray method to particle concentration into
Row measurement.However, Beta-ray energy is lower as civilian environment supervision instrument.Gas is situated between as Beta-ray absorption
Matter, when β ray energy is lower, the variation of gas density will affect detector to Beta-ray counting.However in sampling, root
According to the equation of gas state, the variation of room pressure and temperature is sampled, will affect the change of gas density in sampler chamber, and then influence
For detector to Beta-ray counting, this affects the accuracy of measuring concentration of granules in certain to a certain extent.
Summary of the invention
When present invention aim to address using β ray method measurement particle concentration, the variation of the pressure, temperature of sampler chamber
It will affect the variation of the density of sampling room air, and the change of atmospheric density will affect the counting of detector, to influence
The problem of accuracy of measuring concentration of granules in certain, provides a kind of based on the Atmospheric particulates on-Line Monitor Device of β ray method and side
Method.
The technical solution adopted by the present invention is that: a kind of Atmospheric particulates on-Line Monitor Device based on β ray method, including adopt
Specimen chamber and vacuum pump, described sampler chamber one end connect air inlet, and the other end connects gas outlet；The top of the sampler chamber connects
Detector, its underpart connect beta ray source；Paper tape passes through sampler chamber, between detector and beta ray source, described paper tape one end
Paper feed driving wheel is connected, the other end connects paper feed follower；The spot of the detector, beta ray source and paper tape is straight at one
On line；The sampler chamber is also connected with pressure sensor and Temperature Humidity Sensor, the pressure sensor and Temperature Humidity Sensor
Probe be located in sampler chamber.
A kind of method for monitoring atmospheric particles online based on β ray method, while including the following steps: 1) sampling, note
Record the temperature value T1 and pressure value P 1 of Current detector count value N1, sampler chamber；2) after interval of time, record detection again
Device count value N2, the temperature value T2 of sampler chamber and pressure value P 2；3) according to the variation of the temperature value of sampler chamber and pressure value, to spy
Device count value is surveyed to be modified；4) revised count value combination system parameter calculates the concentration of present granule object.
As a further improvement of the present invention, it is connected with bracket on the outside of the sampler chamber, is separately installed on the bracket
Detector, beta ray source, Temperature Humidity Sensor and pressure sensor.
As a further improvement of the present invention, the correction formula of the count value is N2+ (T1-T2) * X1+ (P1-P2) *
X2, wherein X1, X2 are respectively equipment factory test value.
As a further improvement of the present invention, the X1 is that sampling chamber pressure is constant, and temperature obtains change in count after changing
Value；The X2 is that sampler chamber is temperature-resistant, the change in count value obtained after pressure change.
The beneficial effect that the present invention uses is: the present invention is changed by the temperature and pressure of monitoring sampler chamber, respectively to temperature
The variation of degree and pressure carries out count compensation amendment, so that the accuracy of particle concentration on-line measurement is greatly improved, it is right
The On-line sampling system of atmosphere particle concentration has great importance.
Detailed description of the invention
Fig. 1 is schematic diagram of the present invention.
It is as shown in the figure: 1 air inlet, 2 detectors, 3 paper tapes, 4 paper feed driving wheels, 5 Temperature Humidity Sensors, 6 β radiation
Source, 7 gas outlets, 8 pressure sensors, 9 paper feed followers.
Specific embodiment
Below with reference to Fig. 1, the present invention is described further.
As shown in Figure 1, a kind of Atmospheric particulates on-Line Monitor Device based on β ray method, including sampler chamber and vacuum pump,
Described sampler chamber one end connects air inlet 1, and the other end connects gas outlet 7；The top of the sampler chamber connects detector 2,
Lower part connects beta ray source 6；Paper tape 3 passes through sampler chamber, between detector 2 and beta ray source 6,3 one end of paper tape connection
Paper feed driving wheel 4, the other end connect paper feed follower 9；The spot of the detector 2, beta ray source 6 and paper tape 3 is straight at one
On line；
The sampler chamber is also connected with pressure sensor 8 and Temperature Humidity Sensor 5, the pressure sensor 8 and temperature and humidity sensing
The probe of device 5 is located in sampler chamber.
Air is flowed into from the air inlet above paper tape, is flowed out from the gas outlet below paper tape, and the particulate matter in air is by mistake
It filters on paper tape, paper feed driving wheel and paper feed follower are used to drive paper tape paper feed, after a spot samples, paper feed master
Driving wheel drives paper tape paper feed to next spot, starts the new period.Pressure sensor is used to measure the pressure of sampler chamber, due to
Vacuum pump takes out sampler chamber for negative pressure, and the pressure of sampler chamber is less than ambient atmosphere pressure.Temperature Humidity Sensor is used to measure sampling
The temperature and humidity of room；
Above-mentioned particle concentration on-Line Monitor Device, can real-time online measuring.Whole system is evacuated on one side, on one side to particulate matter
Carry out explorer count.
According to the equation of gas state,,,, wherein P is gas pressure intensity, and M is gas
Body molal weight, ρ are gas density, and R is gas constant, and T is gas temperature.From formula as can be seen that sampling when sampler chamber
The variation of interior pressure and temperature will affect the change of gas density in sampler chamber, and the variation of gas density will affect detector
To Beta-ray counting, this will affect the accuracy of measuring concentration of granules in certain to a certain extent.
In the present apparatus, point-blank, sample gas is from recent mouth stream for detector, sampling spot, β ray irradiation source
Enter, the particulate matter in gas is filtered on paper tape, forms sampling spot.Detector measurement records before spot samples and after sampling
Count value, temperature and humidity detector and pressure detector record the temperature value and pressure value of sampling front and back respectively, thus to sampling
The variation of room temperature and pressure carries out count compensation amendment, can calculate present granule object concentration in conjunction with system parameter.
Above-mentioned particle concentration on-line monitoring method, it is characterised in that when temperature and pressure changes in sampler chamber, respectively
Count compensation amendment is carried out to the variation of temperature and pressure, to greatly improve the accurate of particle concentration on-line measurement
Property, have great importance to the On-line sampling system of atmosphere particle concentration.
Embodiment 1, under the action of vacuum pump, air flows into sampler chamber from air inlet 1, then is discharged from gas outlet 7, air
In particulate matter be filtered on paper tape 3；Paper tape 3 passes through sampler chamber, is mounted between detector 2 and beta ray source 6.Detector 2
It is rack-mount with beta ray source 6, and detector 2, beta ray source 6 and 3 spot of paper tape are point-blank；Temperature and humidity sensing
Device 5 and pressure sensor 8 are rack-mount, and probe is placed in inside sampler chamber, separately detect temperature and humidity inside sampler chamber and
Pressure.
As air constantly flows into, particulate matter is built up, and detector records current detector meter while sampling
Number N1, temperature sensor record current temperature value T1, and pressure sensor records current pressure value P 1；Interval of time
Afterwards, explorer count N2, temperature value T2, pressure value P 2 are recorded again.
When β ray energy is lower, gas will affect detector to β as Beta-ray absorbing medium, the variation of gas density
The counting of ray.If sampling room temperature to increase, gas density is to reduce, and explorer count at this time can become larger；If sampling
Chamber pressure becomes larger, and gas density becomes larger, and explorer count at this time can become smaller；It therefore must be to by sampling room temperature and pressure
The variation counted caused by power variation is modified.
Its correction formula of revised count value is N2+ (T1-T2) * X1+ (P1-P2) * X2, wherein sampling room temperature is drawn
Play the coefficient X1 of change in count, sampling chamber pressure causes the coefficient X2 of change in count to be obtained respectively by experiment.Specifically measure method
As follows: fixed sample chamber pressure first is constant, and temperature changes, and obtaining change in count is X1, and fixed sample room temperature is constant, pressure
Power changes, and obtaining change in count is X2.
According to N1 and revised N2, the concentration of present granule object can be calculated in conjunction with system parameter.By count value knot
Closing system parameter and calculating present granule object concentration is the prior art, does not do tired state herein.
The PM10 data that three are measured using the present apparatus, the PM10 data measured with manual method do linear fit.Table one
Data and hand dipping data to use the device of the invention to acquire carry out linear fit as a result, table two is not using this hair
The data and hand dipping data of bright device acquisition carry out the result of linear fit, it can be seen that are wanted using data of the invention
Far better than the modified data of temperature, pressure are not carried out, the accuracy of particle concentration on-line measurement is substantially increased.
The present invention is changed by the temperature and pressure of monitoring sampler chamber, carries out counting benefit to the variation of temperature and pressure respectively
Amendment is repaid, so that the accuracy of particle concentration on-line measurement is greatly improved, to the online real-time of atmosphere particle concentration
Measurement has great importance.
Those skilled in the art should know the protection scheme of the present invention is not limited only to the above embodiments, can also be
Various permutation and combination and transformation are carried out on the basis of above-described embodiment, on the premise of without prejudice to spirit of the invention, to the present invention
The various transformation carried out are fallen within the scope of protection of the present invention.
Claims (5)
1. a kind of Atmospheric particulates on-Line Monitor Device based on β ray method, including sampler chamber and vacuum pump, it is characterized in that described
Sampler chamber one end connects air inlet (1), and the other end connects gas outlet (7)；The top of the sampler chamber connects detector (2),
Its underpart connects beta ray source (6)；Paper tape (3) passes through sampler chamber, between detector (2) and beta ray source (6), the paper tape
(3) one end connection paper feed driving wheel (4), the other end connect paper feed follower (9)；The detector (2), beta ray source (6) and
The spot of paper tape (3) is point-blank；
The sampler chamber is also connected with pressure sensor (8) and Temperature Humidity Sensor (5), the pressure sensor (8) and warm and humid
The probe of degree sensor (5) is located in sampler chamber.
2. a kind of Atmospheric particulates on-Line Monitor Device based on β ray method according to claim 1, it is characterized in that described
It is connected with bracket on the outside of sampler chamber, detector (2), beta ray source (6), Temperature Humidity Sensor (5) are separately installed on the bracket
With pressure sensor (8).
3. a kind of method for monitoring atmospheric particles online based on β ray method, it is characterized in that including the following steps:
While sampling, the temperature value T1 and pressure value P 1 of record Current detector count value N1, sampler chamber；
After interval of time, the temperature value T2 and pressure value P 2 of explorer count value N2, sampler chamber are recorded again；
According to the variation of the temperature value of sampler chamber and pressure value, explorer count value is modified；
Revised count value combination system parameter calculates the concentration of present granule object.
4. a kind of method for monitoring atmospheric particles online based on β ray method according to claim 3, it is characterized in that described
The correction formula of count value is N2+ (T1-T2) * X1+ (P1-P2) * X2, wherein X1, and X2 is respectively equipment factory test value.
5. a kind of method for monitoring atmospheric particles online based on β ray method according to claim 4, it is characterized in that described
X1 is that sampling chamber pressure is constant, and temperature obtains change in count value after changing；The X2 is that sampler chamber is temperature-resistant, after pressure change
Obtained change in count value.
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| CN201811619787.4A CN109540754B (en) | 2018-12-28 | 2018-12-28 | Atmospheric particulate on-line monitoring device and method based on beta-ray method |
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| CN201811619787.4A CN109540754B (en) | 2018-12-28 | 2018-12-28 | Atmospheric particulate on-line monitoring device and method based on beta-ray method |
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| CN109540754B CN109540754B (en) | 2024-06-14 |
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Cited By (7)
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| CN110954455A (en) * | 2019-12-02 | 2020-04-03 | 深圳国技环保技术有限公司 | Damping paper feeding online environment atmosphere monitoring equipment and damping paper feeding adjusting method |
| CN112051193A (en) * | 2020-08-07 | 2020-12-08 | 广州亚美智造科技有限公司 | Gas particulate matter concentration detection device, system and method |
| CN112098285A (en) * | 2020-09-10 | 2020-12-18 | 天津同阳科技发展有限公司 | Volatile particulate matter compensation measuring device and method based on beta-ray method |
| CN113008745A (en) * | 2021-02-25 | 2021-06-22 | 德航（天津）智能科技有限公司 | Raise dust on-line monitoring device with binary channels beta ray |
| CN113670783A (en) * | 2021-03-22 | 2021-11-19 | 王庚 | Method and device for directly measuring and calculating concentration of particulate matters in gas based on beta-ray method |
| CN113670785A (en) * | 2021-09-27 | 2021-11-19 | 北京伟瑞迪科技有限公司 | Particulate matter concentration monitoring method, device, equipment and storage medium |
| CN115372220A (en) * | 2022-10-26 | 2022-11-22 | 杭州泽天春来科技有限公司 | Particulate matter concentration detection device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954455A (en) * | 2019-12-02 | 2020-04-03 | 深圳国技环保技术有限公司 | Damping paper feeding online environment atmosphere monitoring equipment and damping paper feeding adjusting method |
| CN112051193A (en) * | 2020-08-07 | 2020-12-08 | 广州亚美智造科技有限公司 | Gas particulate matter concentration detection device, system and method |
| CN112051193B (en) * | 2020-08-07 | 2024-05-31 | 亚美智联数据科技有限公司 | Gas particulate concentration detection device, system and method |
| CN112098285A (en) * | 2020-09-10 | 2020-12-18 | 天津同阳科技发展有限公司 | Volatile particulate matter compensation measuring device and method based on beta-ray method |
| CN112098285B (en) * | 2020-09-10 | 2021-04-06 | 天津同阳科技发展有限公司 | Volatile particulate matter compensation measuring device and method based on beta-ray method |
| CN113008745A (en) * | 2021-02-25 | 2021-06-22 | 德航（天津）智能科技有限公司 | Raise dust on-line monitoring device with binary channels beta ray |
| CN113670783A (en) * | 2021-03-22 | 2021-11-19 | 王庚 | Method and device for directly measuring and calculating concentration of particulate matters in gas based on beta-ray method |
| CN113670785A (en) * | 2021-09-27 | 2021-11-19 | 北京伟瑞迪科技有限公司 | Particulate matter concentration monitoring method, device, equipment and storage medium |
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| CN115372220A (en) * | 2022-10-26 | 2022-11-22 | 杭州泽天春来科技有限公司 | Particulate matter concentration detection device |
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