CN209559708U - High time resolution realtime monitor device for granular articles based on β ray method - Google Patents
High time resolution realtime monitor device for granular articles based on β ray method Download PDFInfo
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- CN209559708U CN209559708U CN201822122069.8U CN201822122069U CN209559708U CN 209559708 U CN209559708 U CN 209559708U CN 201822122069 U CN201822122069 U CN 201822122069U CN 209559708 U CN209559708 U CN 209559708U
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Abstract
The utility model relates to gas-detecting device technical field more particularly to a kind of high time resolution realtime monitor device for granular articles based on β ray method, including particle sampling mechanism, filter paper tape transport and particulate matter acquisition testing mechanism；The particle sampling mechanism and particulate matter acquisition testing mechanism are in same cavity, the particle sampling mechanism includes sampling head and sampling pump, the filter paper tape transport includes driving wheel, follower, filter-paper-tape and platen lever, and particulate matter acquisition testing mechanism includes β ray scintillation detector, C14 radioactive source, movable holddown, fixed briquetting and sealing rubber ring.The present apparatus and method can realize real continuous real-time measurement, and stability with higher and accuracy.Real continuous real-time measurement, and stability with higher and accuracy.
Description
Technical field
The utility model relates to gas-detecting device technical field more particularly to a kind of high times based on β ray method point
Resolution realtime monitor device for granular articles.
Background technique
As the device of finely ground particles concentration in measurement atmosphere, β ray method particulate matter detection means are by certain flow
Atmosphere be continuously drawn into sampling head, cutting is carried out to gas by given cut device and filters out the particulate matters of target components.
Gas is arranged on the filter-paper-tape among chamber by particulate matter when sampling chamber and captures, and acquires particulate matter with β radiation exposure
Filter-paper-tape later, β ray can be led to Beta-ray decaying by particulate adsorbent.The matter of Beta-ray attenuation and its penetrating material
Proportion relation is measured, admittedly the concentration of particulate matter can be measured by measuring the amount of β ray attenuation.
Traditional is had the following deficiencies: based on β attenuation sensors particulate matter detection means first, cannot achieve real-time survey
Amount.Second, higher to paper tape rotation distance control accuracy requirement, extremely small range error will lead to the inclined of measurement result
Difference.Thirdly sampling interval more short data fluctuation is bigger.Traditional approach sampling section and measurement part are separately positioned on two chambers
Paper tape needs to move back and forth between sampling chamber and measurement chamber when room, sampling and measurement, so the data measured are to be spaced not
Continuous and period shorter movement frequency more high measurement fluctuation is bigger, and error is also bigger.
Utility model content
The main purpose of the utility model provides a kind of reflective filtering apparatus aiming at the above problem, can be continuous
Real-time measurement, and stability with higher and accuracy.
In order to achieve the above object, the utility model adopts the following technical solutions: a kind of high time resolution based on β ray method
Rate realtime monitor device for granular articles, it is characterised in that: adopted including particle sampling mechanism, filter paper tape transport and particulate matter
Collect testing agency；The particle sampling mechanism and particulate matter acquisition testing mechanism are in same cavity, the particle sampling
Mechanism includes sampling head and sampling pump, and the filter paper tape transport includes driving wheel, follower, filter-paper-tape and platen lever,
Particulate matter acquisition testing mechanism includes β ray scintillation detector, C14 radioactive source, movable holddown, fixed briquetting and sealant
Circle, the sampling head are connected to the inlet channel of the movable holddown, and the β ray scintillation detector is fixed on the activity pressure
The top of block, the C14 radioactive source is corresponding with the β ray scintillation detector and is mounted on fixed briquetting, the sampling pump
It being connected to the gas outlet of the fixed briquetting side, the driving wheel and follower are located at the two sides of the fixed briquetting,
Rate paper tape is wound on driving wheel and follower, and filter-paper-tape passes through between referring to from β ray scintillation detector, C14 radioactive source, the sealing
Cushion rubber is arranged between the fixed briquetting and movable holddown, and the platen lever is in movable holddown connection and and eccentric wheel
Cooperation.
Preferably, the inlet channel and the paper tape are at 20 ° of -30 ° of angles.
The beneficial effects of the utility model are: compared with the existing technology, the present apparatus and method can realize really it is continuous in real time
Measurement, and stability with higher and accuracy.Real continuous real-time measurement, and stability with higher and accuracy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
With reference to the accompanying drawing and specific embodiment of the present utility model is described in detail in preferred embodiment.As shown in Figure 1, one
High time resolution realtime monitor device for granular articles of the kind based on β ray method, including particle sampling mechanism, filter paper belt conveyor
Structure and particulate matter acquisition testing mechanism；The particle sampling mechanism and particulate matter acquisition testing mechanism in same cavity,
The particle sampling mechanism includes sampling head 7 and sampling pump 4, the filter paper tape transport include driving wheel 2, follower 3,
Filter-paper-tape 11 and platen lever 10, particulate matter acquisition testing mechanism include β ray scintillation detector 1, C14 radioactive source 5,8
Movable holddown, fixed briquetting 9 and sealing rubber ring 6, the sampling head are connected to the inlet channel of the movable holddown, and the β is penetrated
Line scintillation detector is fixed on the top of the movable holddown, and the C14 radioactive source and the β ray scintillation detector are corresponding simultaneously
It is mounted on fixed briquetting, the sampling pump is connected to the gas outlet of the fixed briquetting side, the driving wheel and follower
The two sides of the fixed briquetting are located at, the distance between paper tape and scintillation detector are small as far as possible, and β ray passes perpendicularly through paper
Band.C14 radioactive source and scintillation detector are placed in parallel in paper tape two sides and reduce as far as possible spacing, and inlet channel then with paper tape
Cavity is flowed into from side at 20 ° of angles, paper tape is passed through by deflector hole.Particulate matter in air is filtered to paper tape surface, with this
β-ray detector can record the attenuation that β ray passes through paper tape in real time simultaneously.Rate paper tape is wound on driving wheel and follower, filter
Paper tape passes through between referring to from β ray scintillation detector, C14 radioactive source, and the sealing rubber ring is arranged in the fixed briquetting and activity
Between briquetting, the platen lever connects in the movable holddown and cooperates with eccentric wheel.
Air enters system by sampling head, and particulate matter therein enters particle sampling with air-flow after cutter screens
Mechanism, whole system provide Pneumatic pressure by air pump, and when system operation is divided into two periods: sample detecting period and paper feed week
Phase.Air pump is constantly in suction condition in the sample detecting period, and particulate matter is by sampling head by continuously intake system.
Particulate matter is captured when by collecting and detecting device by filter-paper-tape, and the particulate matter quality acquired on filter-paper-tape constantly increases at any time
Add.Because the air transmission coefficient of paper tape reduces with the increase of particulate matter, adopting for gas will affect when reducing to a certain extent
Sample.At this moment the sampled point that just move paper tape more to renew enters the paper feed period at this time.Air pump stops sampling in the paper feed period；
Platen lever action above mentions movable holddown, and the paper tape compressed by movable holddown and fixed briquetting is made to be in relaxed state.Later
Driving wheel rotation, drives paper tape to move right.The previous paper tape region sampled is moved to other than sample region.After the completion of paper feed
Air pump unlatching after paper tape pressing guarantee sealing is restored sampling again and is again introduced into the sampling period by movable holddown and fixed briquetting.It adopts
In the sample period, β-ray detector is continuously detecting the β ray variable quantity across filter-paper-tape.Due to Beta-ray attenuation
There are certain relationships for the quality for passing through substance with it, therefore can be calculated on filter-paper-tape by the Beta-ray variable quantity detected
The mass change of particulate matter.The variation of particulate matter quality is detected with every second/time of frequency, but due to the β spoke of C14 radioactive source
The amount of penetrating can have larger make an uproar in real-time monitoring there are particulate matter variable quantity per second in unstability and paper tape is extremely small
Sound.Therefore it needs to introduce linear regression algorithm: particulate matter quality and detection time being subjected to linear fit, by experimental linearized time
When the time being returned to be greater than one hour, regression curve is more stable.With scanning mode in real time perhaps in one hour quality and time line
Variable quantity of the property fit slope as the particulate matter quality unit time.Again because sampling flow is that then the unit time samples fixed value
Volume of air it is found that finally can pass through the radiometer of particulate matter quality and volume of air calculate particulate matter real-time concentration.
The quality (mg) of M1-------- measurement of species for the first time
The quality (mg) of second of measurement of species of M2--------
The β value that N1-------- is measured for the first time counts (dimensionless)
Second of the N2-------- β value measured counts (dimensionless)
μ/ρ --- -- mass attentuation coefficient (dimensionless)
A--------- β ray crossing point area is defaulted as 2 (cm^2).
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (2)
1. a kind of high time resolution realtime monitor device for granular articles based on β ray method, it is characterised in that: adopted including particulate matter
Model machine structure, filter paper tape transport and particulate matter acquisition testing mechanism；The particle sampling mechanism and particulate matter acquisition inspection
Mechanism is surveyed in same cavity, the particle sampling mechanism includes sampling head and sampling pump, the filter paper tape transport packet
Include driving wheel, follower, filter-paper-tape and platen lever, particulate matter acquisition testing mechanism include β ray scintillation detector,
C14 radioactive source, movable holddown, fixed briquetting and sealing rubber ring, the sampling head are connected to the inlet channel of the movable holddown,
The β ray scintillation detector is fixed on the top of the movable holddown, and the C14 radioactive source and the β ray scintillation detect
Device is corresponding and is mounted on fixed briquetting, and the sampling pump is connected to the gas outlet of the fixed briquetting side, the driving wheel
The two sides of the fixed briquetting are located at follower, rate paper tape is wound on driving wheel and follower, and filter-paper-tape is dodged from β ray
Bright detector, C14 radioactive source pass through between referring to, the sealing rubber ring is arranged between the fixed briquetting and movable holddown, described
Platen lever connects in the movable holddown and cooperates with eccentric wheel.
2. the high time resolution realtime monitor device for granular articles according to claim 1 based on β ray method, feature exist
In: the inlet channel and the paper tape are at 20 ° of -30 ° of angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822122069.8U CN209559708U (en) | 2018-12-17 | 2018-12-17 | High time resolution realtime monitor device for granular articles based on β ray method |
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| CN201822122069.8U CN209559708U (en) | 2018-12-17 | 2018-12-17 | High time resolution realtime monitor device for granular articles based on β ray method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2018
- 2018-12-17 CN CN201822122069.8U patent/CN209559708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112730179B (en) * | 2020-12-23 | 2023-03-03 | 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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