CN106950588B - Survey radon system based on semi-conductor dehumidifying technology - Google Patents
Survey radon system based on semi-conductor dehumidifying technology Download PDFInfo
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- CN106950588B CN106950588B CN201611223881.9A CN201611223881A CN106950588B CN 106950588 B CN106950588 B CN 106950588B CN 201611223881 A CN201611223881 A CN 201611223881A CN 106950588 B CN106950588 B CN 106950588B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/24—Measuring radiation intensity with semiconductor detectors
- G01T1/244—Auxiliary details, e.g. casings, cooling, damping or insulation against damage by, e.g. heat, pressure or the like
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Abstract
The invention belongs to emanometer technical fields, and in particular to a kind of survey radon system based on semi-conductor dehumidifying technology.Including filter membrane, sampling pump, heat dissipation cavity, the hot face of semiconductor refrigeration sheet, the huyashi-chuuka (cold chinese-style noodles) of semiconductor refrigeration sheet, condensation chamber, thermal insulation layer, water-storage pot, measuring system and radiator；Condensation chamber is mounted on the huyashi-chuuka (cold chinese-style noodles) of semiconductor refrigeration sheet, condensation chamber periphery is enclosed with thermal insulation layer, the hot face for being mounted on semiconductor refrigeration sheet on one side of heat dissipation cavity, the another side of heat dissipation cavity is pasted with radiator, sample gas enters condensation chamber by filter membrane under the action of sampling pump, water-storage pot is connect with condensation chamber, and heat dissipation cavity is connect with measuring system.The present invention can solve influence problem of the sample gas humidity to static collection emanometer, realize stable, higher collection efficiency without desiccant.
Description
Technical field
The invention belongs to emanometer technical fields, and in particular to a kind of survey radon system based on semi-conductor dehumidifying technology.
Background technique
Static collection is the current method using a kind of very extensive measurement radon consistence, and this method is to pass through collection
The first generation daughter Po-218 of radon is measured, it is desirable that instrument has high and stable collection efficiency.Just decayed generation
Po-218 be free state metallic atom, there are about 90% probability is positively charged, they are collected under the action of electric field
Detector surface.But during collection, positively charged Po-218 atom is easy to and polarized water vapour molecule phase
Effect becomes neutral particle, and electric field is to its ineffective power, to influence collection efficiency, so the influence for excluding humidity be using
The instrument of static collection needs the major issue solved, and perplexs a great problem of instrument development person for many years.
Influence of the sample gas humidity to static collection emanometer is solved, generally uses desiccant dryness sample gas at present
The method of body, such as the RAD7 electronics emanometer that is produced from the U.S., but this method can consume a large amount of desiccant, need often more
Desiccant is changed, it is all inconvenient to use and carry, and it is even more impossible to realize unattended continuous on-line operation.There is a method in which being exactly
Using temperature and humidity compensation algorithm, but the relationship of collection efficiency and temperature and humidity is complicated, while also by electric field strength, the body of collecting chamber
The influence of the factors such as long-pending and shape, and collection efficiency is very low when measurement high humility gaseous sample, so as to cause the sensitive of instrument
Degree substantially reduces, and measurement error is still very big after compensation, so almost can not find molding instrument in this way in the market.
Summary of the invention
The survey radon system based on semi-conductor dehumidifying technology that the purpose of the present invention is to provide a kind of, it is wet to solve sample gas
The influence problem to static collection emanometer is spent, realizes stable, higher collection efficiency without desiccant.
In order to achieve the above objectives, the technical solution used in the present invention are as follows:
A kind of survey radon system based on semi-conductor dehumidifying technology, including filter membrane, sampling pump, heat dissipation cavity, semiconductor refrigeration sheet
Hot face, semiconductor refrigeration sheet huyashi-chuuka (cold chinese-style noodles), condensation chamber, thermal insulation layer, water-storage pot, measuring system and radiator；Condensation chamber is mounted on
The huyashi-chuuka (cold chinese-style noodles) of semiconductor refrigeration sheet, condensation chamber periphery are enclosed with thermal insulation layer, the heat for being mounted on semiconductor refrigeration sheet on one side of heat dissipation cavity
Face, the another side of heat dissipation cavity are pasted with radiator, and sample gas enters condensation chamber, water storage by filter membrane under the action of sampling pump
Bottle is connect with condensation chamber, and heat dissipation cavity is connect with measuring system.
The sample gas enters temperature after condensation chamber and reduces rapidly and supersaturated, and institute's containing water vapor is in four wall of condensation chamber
Water is condensed into, water-storage pot or drainpipe are flowed into, moisture content substantially reduces in sample gas；The sample gas passes through heat dissipation
After chamber, for temperature recovery to 20 DEG C~40 DEG C, relative humidity drops to 15%, subsequently into the electrostatic collection room of measuring system, collects
The radon daughter that new decay generates.
The heat dissipation cavity is processed into aluminium alloy.
The condensation cavity material is aluminium alloy, and the temperature of condensation chamber is slightly above as low as possible while 0 DEG C.
The insulating layer material is polyurethane.
The water-storage pot can be replaced with drainpipe.
Fan is installed on the radiator.
Between the huyashi-chuuka (cold chinese-style noodles) of the condensation chamber and semiconductor refrigeration sheet, between the hot face and heat dissipation cavity of semiconductor refrigeration sheet,
Heat-conducting silicone grease is all smeared between heat dissipation cavity and radiator.
The measuring system includes electrostatic collection room, silicon semiconductor detector, amplifier and single track or multichannel analyzer,
Analytical calculation is carried out by single-chip microcontroller or microcomputer, obtains the concentration value of radon.
The Po-218 atom that radon decay generates is collected into silicon semiconductor detection under the action of the electric field of electrostatic collection room
The surface of device, Po-218 continue decay and generate signal on silicon semiconductor detector, by amplifier and multichannel analyzer, obtain
Alpha energy spectrum；Single-chip microcontroller calculates the corresponding energy spectral peak of α particle of 6MeV, is obtained by calculating peak area by analyzing α spectrum
The decay of Po-218 counts, and then calculates the radon consistence of sample gas.
It is obtained by the present invention to have the beneficial effect that
The present invention uses conductor refrigeration dehumidifying technology, removes the most of moisture in sample gas, realizes and stablizes
, efficient collection efficiency, to solve the problems, such as influence of the sample gas humidity to static collection emanometer.Without using drying
Agent avoids the desiccant of replacement failure, simplifies the operation of instrument, unattended continuous on-line operation may be implemented.Do not have to
A large amount of desiccant is carried, the portability of instrument can be improved.The technology can be applied to the electrostatic using semiconductor detector
Collecting method is also applied for the static collection using scintillator detector.
Detailed description of the invention
Fig. 1 is the survey radon system construction drawing of the present invention based on semi-conductor dehumidifying technology；
In figure: 1, filter membrane；2, sampling pump；3, heat dissipation cavity；4, the hot face of semiconductor refrigeration sheet；5, semiconductor refrigeration sheet is cold
Face；6, condensation chamber；7, thermal insulation layer；8, water-storage pot；9, measuring system；10, radiator.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the survey radon system of the present invention based on semi-conductor dehumidifying technology includes filter membrane 1, sampling pump 2, dissipates
Hot chamber 3, the hot face 4 of semiconductor refrigeration sheet, the huyashi-chuuka (cold chinese-style noodles) 5 of semiconductor refrigeration sheet, condensation chamber 6, thermal insulation layer 7, water-storage pot 8, measurement system
System 9 and radiator 10；Condensation chamber 6 is mounted on the huyashi-chuuka (cold chinese-style noodles) 5 of semiconductor refrigeration sheet, and 6 periphery of condensation chamber is enclosed with thermal insulation layer 7, heat dissipation
The hot face 4 for being mounted on semiconductor refrigeration sheet on one side of chamber 3, the another side of heat dissipation cavity 3 are pasted with radiator 10, and sample gas is being adopted
Condensation chamber 6 is entered by filter membrane 1 under the action of sample pump 2, water-storage pot 8 is connect with condensation chamber 6, and heat dissipation cavity 3 and measuring system 9 connect
It connects.
The condensation chamber 6 can use aluminium alloy or other intermetallic composite coatings, be mounted on the huyashi-chuuka (cold chinese-style noodles) 5 of semiconductor refrigeration sheet, outside
It encloses and is enclosed with thermal insulation layer 7,7 material of thermal insulation layer is polyurethane or other thermal insulation materials.After sample gas reaches condensation chamber 6, temperature
Rapidly reducing causes vapor supersaturated, and most of vapor condenses out.Water-storage pot 8 can be used to store condensation in the system
Water can also be expelled directly out with drainpipe.The temperature of condensation chamber 6 be slightly above it is as low as possible while 0 DEG C, such as 1 DEG C ± 0.5 DEG C
Or 2 DEG C ± 1 DEG C etc., range without being limited thereto.Sample gas enters temperature after condensation chamber 6 and reduces rapidly and supersaturated, and institute is aqueous
Steam condenses into water in 6 four wall of condensation chamber, flows into water-storage pot 8 or drainpipe.Moisture content substantially reduces in sample gas.
The heat dissipation cavity 3 can use aluminium alloy or other thermally conductive good intermetallic composite coatings, be mounted on semiconductor refrigeration sheet
Hot face 4.The another side of heat dissipation cavity 3 is pasted with radiator 10.If it is necessary, fan, forced heat radiation can be installed on radiator 10.
Between condensation chamber 6 and the huyashi-chuuka (cold chinese-style noodles) of semiconductor refrigeration sheet 5, between the hot face 4 and heat dissipation cavity 3 of semiconductor refrigeration sheet, dissipate
Heat-conducting silicone grease is all smeared between hot chamber 3 and radiator 10, to eliminate the air gap of contact surface, thermal resistance is reduced, enhances its heat
The ability of transmitting.
After sample gas passes through heat dissipation cavity 3, for temperature recovery to 20 DEG C~40 DEG C, relative humidity can drop to 15% or so.
Subsequently into the electrostatic collection room of measuring system, the radon daughter that new decay generates is collected.
Measuring system 9 includes amplifier and single track or multichannel analyzer, carries out analytical calculation by single-chip microcontroller or microcomputer, obtains
To the concentration value of radon.
All piping connections should use highdensity plastic flexible pipe, avoid using metal tube.
The semiconductor dehumidifying device of the system has used semiconductor refrigeration sheet.Conductor refrigeration is a kind of to generate negative thermal resistance
Refrigeration Technique: it when one piece of N-type semiconductor material and one piece of p-type semiconductor material are connected to galvanic couple clock synchronization, connects in this circuit
After logical DC current, the transfer of energy can be generated, electric current absorbs heat by the connector that N-type element flows to p-type element, becomes cold
End discharges heat by the connector that p-type element flows to N-type element, becomes hot end.There are many conductor refrigeration advantage: refrigeration speed is fast,
Its refrigeration speed can control by adjusting operating current；It is noiseless, without friction, without abrasion, it is reliable for operation, easy to maintain；Body
Product is small, light-weight；It is free from environmental pollution without using refrigerant；Two kinds of purposes of cooling and heating type can be reached by changing current direction,
Accurate temperature control may be implemented.
Embodiment one,
Sample gas is by filter membrane 1 under the action of sampling pump 2, and by condensation chamber 6, radiator 3 reaches measuring system 9
Electrostatic collection room, then emit.Measuring system 9 includes electrostatic collection room, silicon semiconductor detector, amplifying circuit, more
Channel analyzer, SCM system etc..
6 temperature of condensation chamber control in the range of 2 DEG C ± 1 DEG C, the rapid drop in temperature of sample gas and it is supersaturated, condense
Water flows into water-storage pot 8 (manually outwelling water after full).Sample gas enters heat dissipation cavity 3 after condensation chamber 6, and temperature, which rises, to be caused
40 DEG C, relative humidity can be reduced to 15% or less.Radiator 10 install fan, heat dissipation cavity 3 when the temperature is excessively high, using fan into
Row forced heat radiation.
The Po-218 atom that radon decay generates is collected into silicon semiconductor detection under the action of the electric field of electrostatic collection room
The surface of device, Po-218 continue decay and generate signal on semiconductor detector, by amplifying circuit and multichannel analyzer, obtain
Alpha energy spectrum.SCM system calculates the corresponding energy spectral peak of α particle of 6MeV, passes through and calculate peak area by analyzing α spectrum
The decay for obtaining Po-218 counts, and then calculates the radon consistence of sample gas.
Sampling pump 2 can be run always in entire measurement process, can also cooperate intermittent duty with semiconductor refrigeration sheet,
When the gas of electrostatic collection room is sufficiently changed to sample gas, diaphragm pump 2 and semiconductor chilling plate can be stopped
Work, to save electric energy.
Embodiment two,
Sample gas is by filter membrane 1 under the action of sampling pump 2, and by condensation chamber 6, radiator 3 reaches measuring system 9
Electrostatic collection room, then emit.Measuring system 9 includes electrostatic collection room, silicon semiconductor detector, amplifying circuit, more
Channel analyzer, SCM system etc..
6 temperature of condensation chamber control in the range of 1 DEG C ± 0.5 DEG C, the rapid drop in temperature of sample gas and it is supersaturated, it is cold
Condensate flows into drainpipe.
Because of the effect of sampling pump 2, the gas pressure in condensation chamber 6 is more slightly larger than the emanometer external world, the condensation in drainpipe
Emanometer can be discharged in water under the action of pressure difference.
Sample gas enters heat dissipation cavity 3 after condensation chamber 6, and temperature, which rises, causes 40 DEG C, and relative humidity can be reduced to
15% or less.Fan is installed, heat dissipation cavity 3 carries out forced heat radiation when the temperature is excessively high, using fan on radiator 10.
The Po-218 atom that radon decay generates is collected into silicon semiconductor detection under the action of the electric field of electrostatic collection room
The surface of device, Po-218 continue decay and generate signal on semiconductor detector, by amplifying circuit and multichannel analyzer, obtain
α spectrum.SCM system calculates the corresponding energy spectral peak of α particle of 6MeV, is obtained by calculating peak area by analyzing α spectrum
Decay to Po-218 counts, and then calculates the radon consistence of sample gas.
2 continuous operation of diaphragm pump, the indoor gas of electrostatic collection are continuously updated as newest sample gas, every
Single-chip microcontroller carries out a α spectrum analysis within 30 minutes, calculates a radon consistence, and measurement result and power spectrum are all stored in historical data
In.To realize the unattended continuous measurement of radon, and measurement result can be passed through into communication interface real-time transmission to number
Change and information system.
Claims (10)
1. a kind of survey radon system based on semi-conductor dehumidifying technology, it is characterised in that: including filter membrane (1), sampling pump (2), heat dissipation
Chamber (3), the hot face (4) of semiconductor refrigeration sheet, the huyashi-chuuka (cold chinese-style noodles) (5) of semiconductor refrigeration sheet, condensation chamber (6), thermal insulation layer (7), water-storage pot
(8), measuring system (9) and radiator (10)；Condensation chamber (6) is mounted on the huyashi-chuuka (cold chinese-style noodles) (5) of semiconductor refrigeration sheet, and condensation chamber (6) is outside
Enclose and be enclosed with thermal insulation layer (7), the hot face (4) for being mounted on semiconductor refrigeration sheet on one side of heat dissipation cavity (3), heat dissipation cavity (3) it is another
Face paste is equipped with radiator (10), and sample gas enters condensation chamber (6) by filter membrane (1) under the action of sampling pump (2), water-storage pot
(8) it is connect with condensation chamber (6), heat dissipation cavity (3) is connect with measuring system (9).
2. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the sample gas
Body enters condensation chamber (6), and temperature reduces rapidly and supersaturated afterwards, and institute's containing water vapor condenses into water in (6) four wall of condensation chamber, flows into
Water-storage pot (8) or drainpipe, moisture content substantially reduces in sample gas；After the sample gas passes through heat dissipation cavity (3), temperature
Degree goes back up to 20 DEG C~40 DEG C, and relative humidity drops to 15%, and subsequently into the electrostatic collection room of measuring system (9), collection newly declines
Sell of one's property raw radon daughter.
3. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the heat dissipation cavity
(3) it is processed into aluminium alloy.
4. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the condensation chamber
(6) material is aluminium alloy, and the temperature of condensation chamber (6) is slightly above as low as possible while 0 DEG C.
5. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the thermal insulation layer
(7) material is polyurethane.
6. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the water-storage pot
(8) it can be replaced with drainpipe.
7. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the radiator
(10) fan is installed on.
8. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the condensation chamber
(6) between the huyashi-chuuka (cold chinese-style noodles) of semiconductor refrigeration sheet (5), between the hot face (4) and heat dissipation cavity (3) of semiconductor refrigeration sheet, heat dissipation cavity (3)
Heat-conducting silicone grease is all smeared between radiator (10).
9. the survey radon system according to claim 1 based on semi-conductor dehumidifying technology, it is characterised in that: the measurement system
System (9) includes electrostatic collection room, silicon semiconductor detector, amplifier and single track or multichannel analyzer, passes through single-chip microcontroller or microcomputer
Analytical calculation is carried out, the concentration value of radon is obtained.
10. the survey radon system according to claim 9 based on semi-conductor dehumidifying technology, it is characterised in that: radon decay generates
Po-218 atom the surface of silicon semiconductor detector is collected under the action of the electric field of electrostatic collection room, Po-218 continues
Decay generates signal on silicon semiconductor detector, by amplifier and multichannel analyzer, obtains alpha energy spectrum；Single-chip microcontroller passes through to α
Spectrum is analyzed, and the corresponding energy spectral peak of α particle of 6MeV is calculated, and the decay that Po-218 is obtained by calculating peak area counts, so
The radon consistence of sample gas is calculated afterwards.
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| CN201611223881.9A CN106950588B (en) | 2016-12-27 | 2016-12-27 | Survey radon system based on semi-conductor dehumidifying technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10935472B2 (en) * | 2018-03-07 | 2021-03-02 | Honeywell International Inc. | Pumped cooling system in gas detector |
| CN109541666B (en) * | 2018-11-27 | 2023-09-05 | 衡阳师范学院 | Measurement of 222 Device and method for eliminating temperature and humidity effect during Rn average concentration |
| CN111337966B (en) * | 2020-03-19 | 2023-03-24 | 衡阳师范学院 | Device and method for measuring soil radon concentration |
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| KR101205412B1 (en) * | 2011-04-20 | 2012-11-27 | 한국지질자원연구원 | Field measurement system and methods of radon gas in groundwater bore hole |
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| CN203191565U (en) * | 2013-05-03 | 2013-09-11 | 贝谷科技股份有限公司 | Device for monitoring radon gas in underground water |
| CN105703244A (en) * | 2016-03-24 | 2016-06-22 | 四川中科源创科技有限公司 | Refrigerating intelligent dehumidification device and dehumidification method for power cabinet |
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