CN209485926U - A kind of Atmospheric particulates on-Line Monitor Device based on β ray method - Google Patents
A kind of Atmospheric particulates on-Line Monitor Device based on β ray method Download PDFInfo
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- CN209485926U CN209485926U CN201822230041.6U CN201822230041U CN209485926U CN 209485926 U CN209485926 U CN 209485926U CN 201822230041 U CN201822230041 U CN 201822230041U CN 209485926 U CN209485926 U CN 209485926U
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Abstract
The utility model discloses 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, 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 utility model 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 utility model relates to atmosphere on-line checking fields, more particularly to the Atmospheric particulates based on β ray method to supervise online
Survey device.
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.
Utility model content
The purpose of this utility model is when solving using β ray method measurement particle concentration, the pressure of sampler chamber, temperature
Variation will affect the variation of the density of sampling room air, and the change of atmospheric density will affect the counting of detector, thus
The problem of influencing the accuracy of measuring concentration of granules in certain, provide a kind of Atmospheric particulates on-Line Monitor Device based on β ray method.
The technical solution adopted in the utility model is: a kind of Atmospheric particulates on-Line Monitor Device based on β ray method, packet
Sampler chamber and vacuum pump are included, described sampler chamber one end connects air inlet, and the other end connects gas outlet;The top of the sampler chamber
Detector is connected, its underpart connects beta ray source;Paper tape passes through sampler chamber, between detector and beta ray source, the 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 one
On straight line;The sampler chamber is also connected with pressure sensor and Temperature Humidity Sensor, and the pressure sensor and temperature and humidity pass
The probe of sensor is located in sampler chamber.
It is connected with bracket on the outside of the sampler chamber as a further improvement of the utility model, is pacified respectively on the bracket
Equipped with detector, beta ray source, Temperature Humidity Sensor and pressure sensor.
The beneficial effect that the utility model uses is: the utility model 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 standard of particle concentration on-line measurement
True property, has great importance to the On-line sampling system of atmosphere particle concentration.
Detailed description of the invention
Fig. 1 is utility model diagram.
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 utility model 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
The probe of sensor 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
Grain object carries 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
For the data that use the device of the utility model to acquire and hand dipping data carry out linear fit as a result, table two not use
The data and hand dipping data of the device acquisition of the utility model carry out the result of linear fit, it can be seen that practical using this
Novel data will substantially increase the standard of particle concentration on-line measurement far better than the modified data of temperature, pressure are not carried out
True property.
The utility model is changed by the temperature and pressure of monitoring sampler chamber, is counted respectively to the variation of temperature and pressure
Number compensating approach, so that the accuracy of particle concentration on-line measurement is greatly improved, to the online of atmosphere particle concentration
Real-time measurement has great importance.
Those skilled in the art should know the protection scheme of the utility model is not limited only to the above embodiments, may be used also
To carry out various permutation and combination and transformation on the basis of the above embodiments, without departing from the spirit of the present invention,
The various transformation carried out to the utility model are all fallen in the protection scope of the utility model.
Claims (2)
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).
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109540754A (en) * | 2018-12-28 | 2019-03-29 | 安徽蓝盾光电子股份有限公司 | A kind of Atmospheric particulates on-Line Monitor Device and method based on β ray method |
CN111024573A (en) * | 2019-12-30 | 2020-04-17 | 安徽安光环境科技有限公司 | Sampling and detecting device of β ray method atmospheric particulates monitor |
CN112730179A (en) * | 2020-12-23 | 2021-04-30 | 天津智易时代科技发展有限公司 | Portable beta-ray in-situ online monitor and monitoring method |
-
2018
- 2018-12-28 CN CN201822230041.6U patent/CN209485926U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109540754A (en) * | 2018-12-28 | 2019-03-29 | 安徽蓝盾光电子股份有限公司 | A kind of Atmospheric particulates on-Line Monitor Device and method based on β ray method |
CN109540754B (en) * | 2018-12-28 | 2024-06-14 | 安徽蓝盾光电子股份有限公司 | Atmospheric particulate on-line monitoring device and method based on beta-ray method |
CN111024573A (en) * | 2019-12-30 | 2020-04-17 | 安徽安光环境科技有限公司 | Sampling and detecting device of β ray method atmospheric particulates monitor |
CN112730179A (en) * | 2020-12-23 | 2021-04-30 | 天津智易时代科技发展有限公司 | Portable beta-ray in-situ online monitor and monitoring method |
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