CN109444946A - A kind of intelligence radon thorium analyzer - Google Patents
A kind of intelligence radon thorium analyzer Download PDFInfo
- Publication number
- CN109444946A CN109444946A CN201811599957.7A CN201811599957A CN109444946A CN 109444946 A CN109444946 A CN 109444946A CN 201811599957 A CN201811599957 A CN 201811599957A CN 109444946 A CN109444946 A CN 109444946A
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- China
- Prior art keywords
- scintillation chamber
- intelligence
- radon
- scintillation
- counting circuit
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Classifications
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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
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
-
- 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
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
-
- 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
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/208—Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/12—Provision for actuation of an alarm
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention belongs to technical field of nuclear radiation measurement, and in particular to a kind of intelligence radon thorium analyzer.Scintillation chamber is made of the hollow organic glass of upper and lower two hemisphericals, inside it is coated with zinc sulfide scintillator, there are two gas nozzles for installation at the top of the episphere of scintillation chamber, the crystal partition of two pieces of intersections is installed in scintillation chamber, two pieces of partitions separate two gas nozzles, it emanates by circling around scintillation chamber and being flowed out from another gas nozzle after a gas nozzle air inlet；Probe is provided with photomultiplier tube and divider；Probe output is sent into counting circuit processing, and counting circuit filtering screens interference signal and noise by a small margin, retains the biggish pulse of amplitude, is the calibration pulse with same pulse width by the signal shaping after examination, is counted；Counting circuit is interacted with host computer.The present invention is cheap, detection efficient is high, intelligent and portable.
Description
Technical field
The invention belongs to technical field of nuclear radiation measurement, and in particular to a kind of intelligence radon thorium analyzer.
Background technique
Radon thorium analyzer is the emanation measurement device for radioactive element radon radium thorium content, it is also possible to measure water sample
And in tunnel micro emanation radon concentration.Only one scintillation chamber of traditional radon thorium analyzer, needs pair in sample replacement process
Probe is protected from light, and is prevented probe from exposing, is influenced to measure.And it could be acquired again after needing to vacuumize scintillation chamber
Sample, process is relative complex, is readily incorporated human error.Equipment need with scaler be used cooperatively, need manual calculations concentration,
The deficiencies of no intelligent printing reports, has been unable to satisfy the increasing demand of client.
Summary of the invention
The purpose of the present invention is to provide it is a kind of it is easy to operate, detection efficient is high, the intelligent radon thorium analyzer of intelligent and portable,
To overcome the above shortcomings in the prior art.
In order to achieve the above objectives, the technical solution used in the present invention are as follows:
A kind of intelligence radon thorium analyzer, including scintillation chamber, probe, counting circuit, communication module, high-pressure modular, low pressure molding
Block and host computer；Scintillation chamber is made of the hollow organic glass of upper and lower two hemisphericals, is inside coated with zinc sulfide scintillator, scintillation chamber
Installation is equipped with the crystal partitions of two pieces of intersections, two pieces of partitions are two gas nozzles there are two gas nozzle in scintillation chamber at the top of episphere
It separates, emanates by circling around scintillation chamber and being flowed out from another gas nozzle after a gas nozzle air inlet；Probe be provided with photomultiplier tube and
The optical signal of scintillator is converted into electric signal by divider；Probe output is sent into counting circuit processing, counting circuit mistake
Filter screens interference signal and noise by a small margin, retains the biggish pulse of amplitude, is with identical by the signal shaping after examination
The calibration pulse of pulsewidth, is counted；Counting circuit is interacted by communication module and host computer；High-pressure modular is photoelectricity times
Increase pipe work and high pressure is provided；Low-voltage module provides stable low-voltage power supply for counting circuit and communication module.
The flashing building volume is 500ml.
Three scintillation chambers can be installed on disk, make disk rotational by handle to change the position of scintillation chamber, do not stopping
Scintillation chamber is replaced in the case where machine.
The probe is sealed construction, is fixed on the elastic support with retractility.
The host computer, which has, counts display, concentration calculation, alarm, storage, data export, report generation and printing function
Energy.
When work, generation when photoimpact is the circuit work combined by scintillation chamber, photomultiplier tube and its plate-load
, high pressure provides multistage pressure by divider for photomultiplier tube；When emanate introduce scintillation chamber after, emanate during transformation
On the α particle impacting to zinc sulfide crystal of generation, alpha-particle energy is transferred to zinc sulfide crystal, cause zinc sulphide atomic excitation and
Photon is released in flash of light, and after this photon is received by the photomultiplier tube in work, photoelectron is generated on its photocathode, completes light
Electricity conversion；Photoelectron acted on by electric field focus on photomultiplier tube beat take plate on, secondary electron is inspired, finally, two
Secondary electronics is accelerated to zoom into electron stream, and a pulsating current is formed on the anode load resistor of photomultiplier tube through high frequency cable
And export a negative pulse voltage；In scintillation chamber, the number of α particle is directly proportional to the concentration emanated, i.e., with the frequency of flash of light at
Direct ratio, therefore the pulse frequency for recording photomultiplier tube output has also been known that the indoor concentration of emanating of flashing, i.e. radon thorium contain
Amount or activity.
Survey radon when, emanate introduce scintillation chamber 1.5 hours after measure.
When surveying thorium, thorium emanation must be in flashing indoor moveable.
It is obtained by the present invention to have the beneficial effect that
For the deficiency on traditional radon thorium analyser function, the present invention devises rotary type disk, can pacify on disk
Three scintillation chambers at a distance of hexagonal angle are filled, it is tested scintillation chamber that one of scintillation chamber, which is located at the upper end of photomultiplier tube, other
The scintillation chamber Liang Ge is then in the state of being protected from light, and waits to be measured.It can make disk rotational by handle to change position and the guarantor of scintillation chamber
Card detector is protected from light, and can be replaced scintillation chamber in non-stop-machine situation in this way, saved time of measuring, reduce artificial mistake
Difference.Counting unit is devised, is fixed on instrument base, and is connect with host computer, counting, concentration calculation, number may be implemented
According to functions such as preservation, printings.The present invention has complete data processing function, may be implemented to count display, concentration calculation, report
The functions such as alert, storage, data export.According to the calculation formula of radium in radon in the water of national standard, water, may be implemented corresponding dense
Degree calculates, and combines the industry requirements such as geology, earthquake and made data sheet, provides a great convenience for user.
Detailed description of the invention
Fig. 1 is intelligent radon thorium analyzer structure chart；
In figure: 1, scintillation chamber；2, it pops one's head in；3, counting circuit；4, communication module；5, high-pressure modular；6, low-voltage module；7, on
Position machine.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, intelligence radon thorium analyzer of the present invention includes scintillation chamber 1, probe 2, counting circuit 3, communication mould
Block 4, high-pressure modular 5, low-voltage module 6 and host computer 7.
Scintillation chamber 1 is made of the hollow organic glass of upper and lower two hemisphericals, is inside coated with zinc sulfide scintillator, it be by means of
Outer packing reaches sealing.Installation is there are two gas nozzle at the top of the episphere of scintillation chamber 1, have in scintillation chamber 1 crystal of two pieces of intersections every
Plate, two pieces of partitions separate two gas nozzles, emanate by circling around scintillation chamber and flowing out from another gas nozzle after a gas nozzle air inlet.
When loading and unloading the outer packing of scintillation chamber 1, preferably scintillation chamber 1 is first evacuated, then with specific purpose tool on gland (dead ring)
Tightly or unscrew, to protect gland that will not damage.1 volume of scintillation chamber is 500ml.Three scintillation chambers 1 can be installed on disk.By
Handle can make disk rotational to change the position of scintillation chamber 1, can replace scintillation chamber 1 in non-stop-machine situation in this way.
The optical signal of scintillator is converted into electric signal by probe 2.Probe 2 is sealed construction, is provided with photomultiplier tube
And divider, they are all fixed on the elastic support with retractility, and after guaranteeing replacement photomultiplier tube, photocathode still may be used
Connect by ground with scintillation chamber 1.
2 output signals of popping one's head in are sent into counting circuit 3 and are handled, and the filtering of counting circuit 3 screens interference signal by a small margin and makes an uproar
Sound retains the biggish pulse of amplitude, is the calibration pulse with same pulse width by the signal shaping after examination, is counted.Meter
Number circuit 3 is interacted by communication module 4 with host computer 7.
High-pressure modular 5 provides high pressure for photomultiplier tube work.
Low-voltage module 6 is that counting circuit 3 and communication module 4 provide stable low-voltage power supply.
Host computer 7 has the function of to count display, concentration calculation, alarm, storage, data export, report generation and printing etc..
The course of work is as follows: this radon thorium analyzer work when, photoimpact be by scintillation chamber 1, photomultiplier tube and its
It is generated when the circuit work of plate-load combination, wherein high pressure provides multistage pressure by divider for photomultiplier tube.When
It emanates after introducing scintillation chamber 1, emanates on the α particle impacting to zinc sulfide crystal generated during transformation, alpha-particle energy transfer
To zinc sulfide crystal, cause zinc sulphide atomic excitation and glisten and release photon, this photon is received by the photomultiplier tube in work
Afterwards, photoelectron is generated on its photocathode, completes photoelectric conversion.Photoelectron is focused on photomultiplier tube by the effect of electric field
Beat and take on plate, secondary electron is inspired, finally, secondary electron is accelerated to zoom into electron stream, through high frequency cable in photoelectricity times
Increase and forms a pulse current on the anode load resistor of pipe and export a negative pulse voltage.
In scintillation chamber 1, the number of α particle is directly proportional to the concentration emanated, i.e., directly proportional to the frequency of flash of light.Therefore:
The pulse frequency of record photomultiplier tube output has also been known that the concentration of emanating in scintillation chamber 1, the i.e. content or activity of radium thorium.
For surveying radon (survey radium), due to the half-life period of emanation radon much longer than the daughter element half-life period of radon, so
The α particle that the daughter element in measurement process, not only having recorded the α particle of emanation radon generation, and having recorded radon is released.Cause
This, after introducing is emanated, the umber of pulse that counting circuit 3 is recorded in the same time is at any time and increased.According to experiment, penetrate
After gas introduces scintillation chamber 1-1.5 hours, the increase of intensity is just slower.Measurement accuracy just can satisfy analysis and require.Cause
This, using scintillation chamber 1 survey radium when, it is proposed that preferably emanate introduce scintillation chamber 1.5 hours after measure.
When surveying thorium, since the half-life period of thorium emanation is shorter, therefore in measurement, thorium emanation must flow in scintillation chamber 1,
Dynamic equilibrium state is kept, in order to which voltage drop method can be used using existing equipment in laboratory.
Claims (8)
1. a kind of intelligence radon thorium analyzer, it is characterised in that: including scintillation chamber, probe, counting circuit, communication module, high pressing mold
Block, low-voltage module and host computer；Scintillation chamber is made of the hollow organic glass of upper and lower two hemisphericals, is inside coated with vulcanization zinc flash
Body, installation is equipped with the crystal partitions of two pieces of intersections, two pieces of partitions there are two gas nozzle in scintillation chamber at the top of the episphere of scintillation chamber
Two gas nozzles are separated, are emanated by circling around scintillation chamber and being flowed out from another gas nozzle after a gas nozzle air inlet；Probe is provided with light
The optical signal of scintillator is converted into electric signal by electric multiplier tube and divider；Probe output is sent into counting circuit processing, meter
The filtering of number circuit screens interference signal and noise by a small margin, retains the biggish pulse of amplitude, is by the signal shaping after examination
Calibration pulse with same pulse width, is counted；Counting circuit is interacted by communication module and host computer；High-pressure modular
High pressure is provided for photomultiplier tube work；Low-voltage module provides stable low-voltage power supply for counting circuit and communication module.
2. intelligence radon thorium analyzer according to claim 1, it is characterised in that: the flashing building volume is 500ml.
3. intelligence radon thorium analyzer according to claim 1, it is characterised in that: three scintillation chambers can be installed on disk,
Make disk rotational by handle to change the position of scintillation chamber, replaces scintillation chamber in non-stop-machine situation.
4. intelligence radon thorium analyzer according to claim 1, it is characterised in that: the probe is sealed construction, Gu
It is scheduled on the elastic support with retractility.
5. intelligence radon thorium analyzer according to claim 1, it is characterised in that: the host computer have count display,
Concentration calculation, alarm, storage, data export, report generation and printing function.
6. intelligence radon thorium analyzer according to claim 1, it is characterised in that: when work, photoimpact be by scintillation chamber,
It is generated when the circuit work of photomultiplier tube and its plate-load combination, high pressure is provided by divider for photomultiplier tube more
Grade high pressure；When emanate introduce scintillation chamber after, emanate on the α particle impacting to zinc sulfide crystal generated during transformation, α particle
Energy transfer causes zinc sulphide atomic excitation and glistens and release photon to zinc sulfide crystal, this photon is by the photoelectricity times in work
After increasing pipe reception, photoelectron is generated on its photocathode, completes photoelectric conversion；Photoelectron is focused on light by the effect of electric field
Beating for electric multiplier tube is taken on plate, and secondary electron is inspired, finally, secondary electron is accelerated to zoom into electron stream, through high frequency cable
A pulsating current is formed on the anode load resistor of photomultiplier tube and exports a negative pulse voltage；In scintillation chamber, α particle
Number it is directly proportional to the concentration emanated, i.e., it is directly proportional to the frequency of flash of light, thus record photomultiplier tube output pulse frequency
Rate has also been known that the indoor concentration of emanating of flashing, the i.e. content or activity of radon thorium.
7. intelligence radon thorium analyzer according to claim 6, it is characterised in that: when surveying radon, introduce scintillation chamber 1.5 emanating
It is measured after hour.
8. intelligence radon thorium analyzer according to claim 6, it is characterised in that: when surveying thorium, thorium emanation must be in scintillation chamber
Interior flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811599957.7A CN109444946A (en) | 2018-12-26 | 2018-12-26 | A kind of intelligence radon thorium analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811599957.7A CN109444946A (en) | 2018-12-26 | 2018-12-26 | A kind of intelligence radon thorium analyzer |
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| Publication Number | Publication Date |
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| CN109444946A true CN109444946A (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811599957.7A Pending CN109444946A (en) | 2018-12-26 | 2018-12-26 | A kind of intelligence radon thorium analyzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082810A (en) * | 2019-05-09 | 2019-08-02 | 成都理工大学 | A kind of graduation apparatus being fitted scintillation chamber K value |
| CN111413726A (en) * | 2020-04-22 | 2020-07-14 | 湖北大秦维康检验测试认证有限公司 | Radon detector and calibration method thereof |
| CN113985469A (en) * | 2021-12-04 | 2022-01-28 | 南华大学 | Standard radon chamber222Rn concentration automatic constant value measurement system and method |
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Patent Citations (6)
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|---|---|---|---|---|
| GB1264186A (en) * | 1968-09-20 | 1972-02-16 | ||
| GB1380336A (en) * | 1971-05-11 | 1975-01-15 | Searle & Co | Multiple sample coincidence counter |
| CN2537986Y (en) * | 2002-04-27 | 2003-02-26 | 汤三星 | Radon-thorium analyzer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082810A (en) * | 2019-05-09 | 2019-08-02 | 成都理工大学 | A kind of graduation apparatus being fitted scintillation chamber K value |
| CN111413726A (en) * | 2020-04-22 | 2020-07-14 | 湖北大秦维康检验测试认证有限公司 | Radon detector and calibration method thereof |
| CN111413726B (en) * | 2020-04-22 | 2023-11-28 | 湖北大秦维康检验测试认证有限公司 | Radon measuring instrument and calibration method thereof |
| CN113985469A (en) * | 2021-12-04 | 2022-01-28 | 南华大学 | Standard radon chamber222Rn concentration automatic constant value measurement system and method |
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