CN212134962U - Portable intelligent radon-thorium analyzer - Google Patents
Portable intelligent radon-thorium analyzer Download PDFInfo
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- CN212134962U CN212134962U CN201921944213.4U CN201921944213U CN212134962U CN 212134962 U CN212134962 U CN 212134962U CN 201921944213 U CN201921944213 U CN 201921944213U CN 212134962 U CN212134962 U CN 212134962U
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Abstract
The utility model belongs to the technical field of nuclear radiation detects, concretely relates to portable intelligent radon thorium analysis appearance, including gas circuit system 50, nuclear detection system 51, embedded control system 52, power supply system 10, integrated in a suitcase structure. The utility model discloses technical scheme is not enough to traditional radon thorium analysis appearance existence, and the invention has designed novel portable intelligent radon thorium analysis appearance and has mainly integrated gas circuit system, nuclear detection system, embedded control system, power supply system in a suitcase, has realized the miniaturization of instrument, has integrated and the modularization. The automatic continuous measurement of the gas circuit is realized, the radioactive concentration of the emitted gas can be measured on line in real time, the human error in the traditional mode is reduced, and the measurement analysis capability and the automation level of the whole measurement system are improved.
Description
Technical Field
The utility model belongs to the technical field of nuclear radiation detects, concretely relates to portable intelligent radon thorium analysis appearance.
Background
The radon-thorium analyzer is a emanation measuring device for measuring the content of radioactive elements, namely radium and thorium, and can also be used for measuring the concentration of trace radon emanation in a water sample and a tunnel.
Traditional radon-thorium analysis appearance is bulky, and the structure is heavy, and it is inconvenient to carry, operates complicacy, the long-time outdoor operations of not being convenient for, generally need stand 1 ~ 3 hours after the radon gas sampling and just can measure, and the real-time ratio of measurement is relatively poor.
Meanwhile, a vacuum pump is often additionally arranged during sample collection, so that inconvenience of outdoor operation is increased.
The flow rate and the sampling time during gas sampling are often determined by the experience of an operator, and certain human errors are easily brought to the measurement result.
In addition, because the temperature, the humidity and the pressure of the environment have certain influence on the measurement result during sampling and measurement, the significance of recording related data on the analysis of the measurement result is great, and the existing radon-thorium analyzer does not have related functions and cannot meet the increasing requirements of customers.
Due to the defects, a portable intelligent radon-thorium analyzer needs to be developed, so that the problems are solved.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a small, easy operation, high, multi-functional portable intelligent radon thorium analysis appearance of stability to overcome the above-mentioned not enough that prior art exists.
In order to realize the purpose, the invention adopts the technical scheme that:
a portable intelligent radon-thorium analyzer comprises an air path system 50, a nuclear detection system 51, an embedded control system 52 and a power supply system 10 which are integrated in a suitcase structure;
The gas circuit system 50 is used for collecting sample gas and providing a sample source for measuring the radioactivity of the nuclear detection system;
the gas path system comprises a gas inlet nozzle 7, a filter 1, an inlet electromagnetic valve 2, a spherical scintillation chamber 3, an outlet electromagnetic valve 4, an electronic flow switch 5, a vacuum pump 30 and a gas outlet nozzle 6, and all the components are connected through silicone tubes;
the air inlet nozzle 7 is connected with an external sampling air path and is an inlet of the sample gas inlet device;
the filter 1 filters the sample gas to remove radon daughter in the sample gas;
the inlet electromagnetic valve 2 and the outlet electromagnetic valve 4 are respectively controlled by an ARM controller 26, and the on-off of the inlet electromagnetic valve 2 and the outlet electromagnetic valve 4 is controlled by the ARM controller 26 to control the on-off of the gas path system;
the sample gas enters the spherical scintillation chamber 3 through the inlet electromagnetic valve 2 and leaves the spherical scintillation chamber 3 through the outlet electromagnetic valve 4;
the electronic flow switch 5 is controlled by an ARM controller 26, monitors the flow of the gas path, and displays the flow on the liquid crystal display screen 11;
the vacuum pump 30 is controlled by the ARM controller 26, provides circulating power for the air path system, and controls the flow rate of the air path through the ARM controller 26;
the air outlet nozzle 6 is connected with an external air path;
second, nuclear detection system 51
The nuclear detection system 51 comprises a spherical scintillation chamber 3, a photomultiplier 8, a preamplifier 9, a main amplifier and phase inverter 23, a single-channel discriminator 24 and a forming circuit 25;
the nuclear detection system 51 is used for performing activity detection on alpha particle rays generated by the sample gas in the spherical scintillation chamber 3, radon daughter is filtered after the sample gas passes through the filter 1, the ratio of radon gas decaying into radon daughter along with time after the radon gas enters the scintillation chamber 3 is determined, and the activity of the radon gas is measured in real time on line within the set flow rate and measurement time;
an integrated scintillation detector consisting of a spherical scintillation chamber 3, a photomultiplier 8 and a preamplifier 9 which are connected in sequence converts the radioactivity of alpha particles in sample gas into voltage signals with different amplitudes;
the spherical scintillation chamber 3 is coupled and connected with a photocathode of a photomultiplier 8 of the nuclear detection system through an organic glass optical window to provide a measurement gas source for the nuclear detection system;
the signal output by the preamplifier 9 enters a main amplifier and phase inverter 23, and the signal output by the preamplifier 9 is amplified and inverted through the main amplifier and phase inverter 23 so as to meet the required requirements;
signals output by the main amplifier and phase inverter 23 enter a single-channel discriminator 24, dark current of a photomultiplier and interference of nuclear electronics noise are eliminated through the single-channel discriminator 24, and amplitude discrimination is carried out on the signals of the detector;
the signal output by the single channel discriminator 24 enters a forming circuit 25, and the forming circuit 25 outputs a monostable signal to meet the requirement of subsequent digital circuit signal processing;
the forming circuit 25 is connected with an embedded control system;
third, embedded control system 52
The embedded control system 52 comprises an ARM controller 26, an LCD liquid crystal display screen 11, an input keyboard 12, a serial port 13, a USB interface 14, a status display lamp 15, a power switch 16, a sensor input interface 18 and a high-voltage module 28;
the embedded control system 52 counts monostable signals output by the receiving nuclear measurement system forming circuit 25, and collects gas samples by controlling the inlet electromagnetic valve 2, the outlet electromagnetic valve 4, the electronic flow switch 5 and the vacuum pump 30;
the input keyboard 12 is used for parameter setting and function setting;
the serial port 13 performs the following functions: the printer is connected with an upper computer for communication and is connected with a printer for printing;
the USB interface 14 is connected with the USB flash disk and used for exporting data and reports;
the state display lamp 15 conducts red light flashing alarm on the working state of the whole device;
the sensor input interface 18 is connected with the environment sensor, and displays the detection value of the environment sensor on the liquid crystal display screen 11 in real time;
the high-voltage module 28 outputs 0V to-1500V high voltage to provide working negative high voltage for the photomultiplier of the nuclear detection system 8;
the power supply system 10 is connected with a nuclear detection system 51, an embedded control system 52 and a gas circuit system 50 by high-frequency cables, provides a proper low-voltage working power supply for the whole device, and has two working modes of alternating current and lithium batteries.
Further, in the portable intelligent radon-thorium analyzer as described above, the filter 1 is filled with 49# glass fiber paper.
Furthermore, as mentioned above, the spherical scintillation chamber 3 is composed of two organic glass hemispheres with the inner surfaces coated with ZnS scintillation materials, and two organic glass circular light guide partition plates which are perpendicular to each other and coated with ZnS coatings are arranged in the cavity of the scintillation chamber, so that the inside of the spherical scintillation chamber 3 is divided into four chambers.
Furthermore, as mentioned above, the flash chamber air outlet 35 and the flash chamber air inlet 36 are respectively communicated with two adjacent chambers, except that the partition plate between the two adjacent chambers has no air hole, in addition, air holes are arranged between the adjacent chambers and are respectively connected with the chambers at two sides, sample gas is controlled to pass through the four chambers and fully contact with the chambers, and then the flash chamber is discharged, so that the effective detection sensitive volume of alpha particles generated by radon and radon daughter is improved.
Further, in the portable intelligent radon-thorium analyzer, in the spherical scintillation chamber 3, two scintillation spheres formed by organic glass hemispheres coated with ZnS scintillation material on the inner surface are arranged in a metal protective shell, and the inner surface of the metal shell is a reflective layer for improving the collection efficiency of scintillation light.
Further, as mentioned above, in the spherical scintillation chamber 3 of the portable intelligent radon-thorium analyzer, ZnS scintillation material is coatedThe thickness of the layer was 10mg/cm2The detection efficiency of the alpha particles was 100%.
Further, in the portable intelligent radon-thorium analyzer as described above, the volume of the spherical scintillation chamber 3 is 0.5L.
Further, as for the portable intelligent radon-thorium analyzer, the state display lamp 15 gives a red light flashing alarm to the working state of the whole device, and gives an alarm when the system is in at least one of the following four states: when the gas circuit works, the flow value deviates from the normal set error range; the voltage value of the lithium battery is lower than a warning value; communication with an upper computer is abnormal; the activity exceeds a set threshold.
Further, a portable intelligent radon-thorium analyzer as described above, the environmental sensor comprising at least one of the following sensors: temperature sensor, humidity transducer, baroceptor.
The technical scheme of the invention has the beneficial effects that:
aiming at the defects of the traditional radon-thorium analyzer, the novel portable intelligent radon-thorium analyzer is designed, and a gas circuit system, a nuclear detection system, an embedded control system and a power supply system are mainly integrated in a suitcase, so that the miniaturization, integration and modularization of the analyzer are realized.
The automatic continuous measurement of the gas circuit is realized, the radioactive concentration of the emitted gas can be measured on line in real time, the human error in the traditional mode is reduced, and the measurement analysis capability and the automation level of the whole measurement system are improved.
An environment (temperature, humidity and pressure) sensor interface is provided, the environment condition can be measured in real time, and the environment sensor interface has important significance for analyzing the influence of the environment on the measurement result.
Drawings
FIG. 1 is a schematic diagram of the internal connection of a portable intelligent radon-thorium analyzer.
FIG. 2 is a top view of the internal structure of a spherical scintillation chamber of a portable intelligent radon-thorium analyzer.
FIG. 3 is a schematic view of an ARM control system operation interface of the portable intelligent radon-thorium analyzer.
In the figure: 1, a filter;
2 an inlet electromagnetic valve;
3, a spherical scintillation chamber;
4 an outlet electromagnetic valve;
5 an electronic flow switch;
6, an air outlet nozzle;
7, an air inlet nozzle;
8 photomultiplier tube;
9 a preamplifier;
10 a power supply system;
11 a liquid crystal display screen;
12 inputting a keyboard;
13 serial ports;
14 USB interface;
15 status display lights;
16 power switches;
18 a sensor input interface;
23 a main amplifier and an inverter;
a 24 single-pass analyzer;
25 shaping the circuit;
26 an ARM controller;
28 high voltage module;
30 vacuum pumps;
35 a gas outlet of the scintillation chamber;
36 scintillation chamber air inlet;
50 a gas path system;
51 a nuclear detection system;
52 an embedded control system.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the utility model relates to a portable intelligent radon-thorium analyzer, which comprises a gas circuit system 50, a nuclear detection system 51, an embedded control system 52 and a power supply system 10, which are integrated in a suitcase structure;
The gas circuit system 50 is used for collecting sample gas and providing a sample source for measuring the radioactivity of the nuclear detection system;
the gas path system comprises a gas inlet nozzle 7, a filter 1, an inlet electromagnetic valve 2, a spherical scintillation chamber 3, an outlet electromagnetic valve 4, an electronic flow switch 5, a vacuum pump 30 and a gas outlet nozzle 6, and all the components are connected through silicone tubes;
the air inlet nozzle 7 is connected with an external sampling air path and is an inlet of the sample gas inlet device;
49# glass fiber paper is arranged in the filter 1 to filter the sample gas and remove radon daughter in the sample gas;
the inlet electromagnetic valve 2 and the outlet electromagnetic valve 4 are respectively controlled by an ARM controller 26, and the on-off of the inlet electromagnetic valve 2 and the outlet electromagnetic valve 4 is controlled by the ARM controller 26 to control the on-off of the gas path system;
the sample gas enters the spherical scintillation chamber 3 through the inlet electromagnetic valve 2 and leaves the spherical scintillation chamber 3 through the outlet electromagnetic valve 4;
the electronic flow switch 5 is controlled by an ARM controller 26, monitors the flow of the gas path, and displays the flow on the liquid crystal display screen 11;
the vacuum pump 30 is controlled by the ARM controller 26, provides circulating power for the air path system, and controls the flow rate of the air path through the ARM controller 26;
the air outlet nozzle 6 is connected with an external air path;
second, nuclear detection system 51
The nuclear detection system 51 comprises a spherical scintillation chamber 3, a photomultiplier 8, a preamplifier 9, a main amplifier and phase inverter 23, a single-channel discriminator 24 and a forming circuit 25;
the nuclear detection system 51 is used for performing activity detection on alpha particle rays generated by the sample gas in the spherical scintillation chamber 3, radon daughter is filtered after the sample gas passes through the filter 1, the ratio of radon gas decaying into radon daughter along with time after the radon gas enters the scintillation chamber 3 is determined, and the activity of the radon gas is measured in real time on line within the set flow rate and measurement time;
an integrated scintillation detector consisting of a spherical scintillation chamber 3, a photomultiplier 8 and a preamplifier 9 which are connected in sequence converts the radioactivity of alpha particles in sample gas into voltage signals with different amplitudes;
the spherical scintillation chamber 3 is coupled and connected with a photocathode of a photomultiplier 8 of the nuclear detection system through an organic glass optical window to provide a measurement gas source for the nuclear detection system;
the spherical scintillation chamber 3 consists of two organic glass hemispheres with the inner surfaces coated with ZnS scintillation materials, two organic glass circular light guide clapboards which are perpendicular to each other and coated with ZnS coatings are arranged in the cavity of the scintillation chamber, and the interior of the spherical scintillation chamber 3 is divided into four chambers;
the gas outlet 35 and the gas inlet 36 of the scintillation chamber are respectively communicated with two adjacent chambers, except that the partition plate between the two adjacent chambers has no gas hole, gas holes are arranged between the other adjacent chambers and are respectively connected with the chambers on the two sides, sample gas is controlled to pass through the four chambers and fully contact, and then the sample gas is discharged out of the scintillation chamber, so that the effective detection sensitive volume of alpha particles generated by radon and radon daughter is improved;
in the spherical scintillation chamber 3, two scintillation spheres formed by organic glass hemispheres coated with ZnS scintillation materials on the inner surfaces are arranged in a metal protective shell, and the inner surface of the metal shell is a reflecting layer for improving the collection efficiency of scintillation light;
the thickness of the ZnS scintillation material coating in the spherical scintillation chamber 3 is 10mg/cm2The detection efficiency of alpha particles is 100%;
the volume of the spherical scintillation chamber 3 is 0.5L;
the signal output by the preamplifier 9 enters a main amplifier and phase inverter 23, and the signal output by the preamplifier 9 is amplified and inverted through the main amplifier and phase inverter 23 so as to meet the required requirements;
signals output by the main amplifier and phase inverter 23 enter a single-channel discriminator 24, dark current of a photomultiplier and interference of nuclear electronics noise are eliminated through the single-channel discriminator 24, and amplitude discrimination is carried out on the signals of the detector;
the signal output by the single channel discriminator 24 enters a forming circuit 25, and the forming circuit 25 outputs a monostable signal to meet the requirement of subsequent digital circuit signal processing;
the forming circuit 25 is connected with an embedded control system;
third, embedded control system 52
The embedded control system 52 comprises an ARM controller 26, an LCD liquid crystal display screen 11, an input keyboard 12, a serial port 13, a USB interface 14, a status display lamp 15, a power switch 16, a sensor input interface 18 and a high-voltage module 28;
the embedded control system 52 counts monostable signals output by the receiving nuclear measurement system forming circuit 25, and collects gas samples by controlling the inlet electromagnetic valve 2, the outlet electromagnetic valve 4, the electronic flow switch 5 and the vacuum pump 30;
the input keyboard 12 is used for parameter setting and function setting;
the serial port 13 performs the following functions: the printer is connected with an upper computer for communication and is connected with a printer for printing;
the USB interface 14 is connected with the USB flash disk and used for exporting data and reports;
the state display lamp 15 gives a red light flashing alarm to the working state of the whole device, and gives an alarm when the system is in at least one of the following four states: when the gas circuit works, the flow value deviates from the normal set error range; the voltage value of the lithium battery is lower than a warning value; communication with an upper computer is abnormal; the radioactivity exceeds a set threshold;
the sensor input interface 18 is connected with the environment sensor, and displays the detection value of the environment sensor on the liquid crystal display screen 11 in real time;
the environmental sensor includes at least one of the following sensors: temperature sensor, humidity transducer, baroceptor.
The high-voltage module 28 outputs 0V to-1500V high voltage to provide working negative high voltage for the photomultiplier of the nuclear detection system 8;
the power supply system 10 is connected with a nuclear detection system 51, an embedded control system 52 and a gas circuit system 50 by high-frequency cables, provides a proper low-voltage working power supply for the whole device, and has two working modes of alternating current and lithium batteries.
The working process is as follows: firstly, exhausting gas for 15-20 minutes in a spherical scintillation chamber 3, opening an inlet electromagnetic valve and an outlet electromagnetic valve 4 by an embedded control system 52, and adjusting the flow rate of a gas path by controlling a vacuum pump 30; then, sampling a gas sample source after adjusting the fixed flow rate, and filtering almost all sub-bodies in the sample gas by using a filter 1 before the gas enters a spherical scintillation chamber 3; generating daughter again in the scintillation chamber after the filtered gas emission; alpha particles generated in the disintegration process of the emitted gas and the daughter impact the ZnS crystal, the energy of the alpha particles is transferred to the ZnS crystal to cause the ZnS atom to be ionized and excited to flash and emit photons, the photons are directly received by a photomultiplier 8 in work through an optical window or the optical window after being reflected by a reflecting layer, and a negative pulse voltage is output on an anode load resistor after photoelectric conversion and multiplication; the negative pulse voltage signal is recorded by an ARM controller 26 after passing through an amplifying and phase inverter 23, a single-channel discriminator 24 and a forming circuit 25;
in the spherical scintillation chamber 3, the number of alpha particles is in direct proportion to the concentration of the emanation and the daughter, and the concentration of the emanation and the daughter in the scintillation chamber 3 can be known by recording the pulse frequency output by the photomultiplier tube 8, because the measured daughter is generated again after the emanation is filtered by the filter 1, the generation of the daughter is strictly carried out according to the radioactive decay rule, so that when the sampling flow rate and the measuring time are fixed, the emanation and the daughter have a definite proportional relation, and the concentration of the emanation can be obtained on line in real time according to the measuring count; the measurement method is a relative measurement method, and the calibration or calibration of the scintillation chamber is needed;
because the half-lives of radon emanation and thorium emanation are different, flow velocity curves need to be measured respectively so as to determine the optimal flow velocity, so that the sensitivity is high, the measurement error is small, and the analysis result is reliable;
after the measurement is finished, the scintillation chamber needs to be exhausted immediately so as to reduce the pollution of the scintillation chamber.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and equivalents and various changes may be made without departing from the scope of the present invention, which is intended to be encompassed by the present invention.
Claims (10)
1. The utility model provides a portable intelligent radon thorium analysis appearance which characterized in that: the system comprises a gas path system (50), a nuclear detection system (51), an embedded control system (52) and a power supply system (10), which are integrated in a suitcase structure;
gas path system (50)
The gas path system (50) is used for collecting sample gas and providing a sample source for the measurement of the radioactivity of the nuclear detection system;
the gas path system comprises a gas inlet nozzle (7), a filter (1), an inlet electromagnetic valve (2), a spherical scintillation chamber (3), an outlet electromagnetic valve (4), an electronic flow switch (5), a vacuum pump (30) and a gas outlet nozzle (6); the air inlet nozzle (7), the filter (1), the inlet electromagnetic valve (2), the spherical scintillation chamber (3), the outlet electromagnetic valve (4), the electronic flow switch (5), the vacuum pump (30) and the air outlet nozzle (6) are connected through a silicone tube;
the air inlet nozzle (7) is connected with an external sampling air path and is an inlet of the sample gas inlet device;
the filter (1) filters the sample gas to remove radon daughter in the sample gas;
the inlet electromagnetic valve (2) and the outlet electromagnetic valve (4) are respectively controlled by an ARM controller (26), and the on-off of the inlet electromagnetic valve (2) and the outlet electromagnetic valve (4) is controlled by the ARM controller (26) to control the on-off of the gas path system;
the sample gas enters the spherical scintillation chamber (3) through the inlet electromagnetic valve (2) and leaves the spherical scintillation chamber (3) through the outlet electromagnetic valve (4);
the electronic flow switch (5) is controlled by an ARM controller (26), monitors the flow of the gas circuit and displays the flow on a liquid crystal display screen (11);
the vacuum pump (30) is controlled by the ARM controller (26) to provide circulating power for the air path system, and the size of the air path flow is controlled by the ARM controller (26);
the air outlet nozzle (6) is connected with an external air path;
second, nuclear detection system (51)
The nuclear detection system (51) comprises a spherical scintillation chamber (3), a photomultiplier (8), a preamplifier (9), a main amplifier and phase inverter (23), a single-channel discriminator (24) and a shaping circuit (25);
the nuclear detection system (51) is used for carrying out activity detection on alpha particle rays generated by the sample gas in the spherical scintillation chamber (3), radon daughter is filtered after the sample gas passes through the filter (1), only the proportion of radon gas which decays into radon daughter along with time after entering the spherical scintillation chamber (3) is determined, and the activity of radon gas is measured in real time on line within the set flow rate and measurement time;
an integrated scintillation detector consisting of a spherical scintillation chamber (3), a photomultiplier (8) and a preamplifier (9) which are connected in sequence converts the alpha particle radioactivity in the sample gas into voltage signals with different amplitudes;
the spherical scintillation chamber (3) is coupled and connected with a photocathode of a photomultiplier (8) of the nuclear detection system through an organic glass optical window to provide a measurement gas source for the nuclear detection system;
the signal output by the preamplifier (9) enters a main amplifier and phase inverter (23), and the signal output by the preamplifier (9) is amplified and inverted through the main amplifier and phase inverter (23) so as to meet the required requirement;
signals output by the main amplifier and the phase inverter (23) enter a single-channel discriminator (24), dark current of a photomultiplier and nuclear electronics noise interference are eliminated through the single-channel discriminator (24), and amplitude discrimination is carried out on the signals of the detector;
the signal output by the single channel discriminator (24) enters a forming circuit (25), and the forming circuit (25) outputs a monostable signal to meet the requirement of subsequent digital circuit signal processing;
the forming circuit (25) is connected with the embedded control system;
three, embedded control system (52)
The embedded control system (52) comprises an ARM controller (26), an LCD (liquid crystal display) screen (11), an input keyboard (12), a serial port (13), a USB interface (14), a state display lamp (15), a power switch (16), a sensor input interface (18) and a high-voltage module (28);
the embedded control system (52) counts monostable signals output by the receiving nuclear measurement system forming circuit (25), and gas samples are collected by controlling the inlet electromagnetic valve (2), the outlet electromagnetic valve (4), the electronic flow switch (5) and the vacuum pump (30);
the input keyboard (12) is used for parameter setting and function setting;
the serial port (13) completes the following functions: the printer is connected with an upper computer for communication and is connected with a printer for printing;
the USB interface (14) is connected with the USB flash disk and used for exporting data and reports;
the state display lamp (15) conducts red light flashing alarm on the working state of the whole device;
the sensor input interface (18) is connected with the environment sensor and displays the detection value of the environment sensor on the liquid crystal display screen (11) in real time;
the high-voltage module (28) outputs 0V to-1500V high voltage to provide working negative high voltage for the photomultiplier of the nuclear detection system 8;
the power supply system (10) is connected with the nuclear detection system (51), the embedded control system (52) and the gas circuit system (50) through high-frequency cables, provides a low-voltage working power supply for the whole device, and has two working modes of an alternating current power supply and a lithium battery power supply.
2. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: the filter (1) is internally provided with No. 49 glass fiber paper.
3. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: the spherical scintillation chamber (3) is composed of two organic glass hemispheres with the inner surfaces coated with ZnS scintillation materials, two organic glass circular light guide clapboards which are perpendicular to each other and coated with ZnS coatings are arranged in the cavity of the scintillation chamber, and the interior of the spherical scintillation chamber (3) is divided into four chambers.
4. The portable intelligent radon-thorium analyzer as defined in claim 3 in which: the gas outlet (35) and the gas inlet (36) of the scintillation chamber are respectively communicated with two adjacent chambers, except that the partition plate between the two adjacent chambers is not provided with gas holes, the gas holes are arranged between the two adjacent chambers and are respectively connected with the chambers on two sides, sample gas is controlled to pass through the four chambers and fully contact the chambers, and then the sample gas is discharged out of the scintillation chamber, so that the effective detection sensitive volume of alpha particles generated by radon and radon daughters is improved.
5. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: in the spherical scintillation chamber (3), two scintillation spheres formed by organic glass hemispheres coated with ZnS scintillation materials on the inner surfaces are arranged in a metal protective shell, and the inner surface of the metal shell is a reflecting layer for improving the collection efficiency of scintillation light.
6. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: the thickness of the ZnS scintillation material coating in the spherical scintillation chamber (3) is 10mg/cm2The detection efficiency of the alpha particles was 100%.
7. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: the volume of the spherical scintillation chamber (3) is 0.5L.
8. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: the state display lamp (15) gives a red light flashing alarm to the working state of the whole device, and gives an alarm when the system is in at least one of the following four states: when the gas circuit works, the flow value deviates from the normal set error range; the voltage value of the lithium battery is lower than a warning value; communication with an upper computer is abnormal; the activity exceeds a set threshold.
9. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: the environmental sensor includes at least one of the following sensors: temperature sensor, humidity transducer, baroceptor.
10. The portable intelligent radon-thorium analyzer as defined in claim 1 in which: 49# glass fiber paper is arranged in the filter (1);
the spherical scintillation chamber (3) consists of two organic glass hemispheres with the inner surfaces coated with ZnS scintillation materials, two organic glass circular light guide clapboards which are perpendicular to each other and coated with ZnS coatings are arranged in a cavity of the scintillation chamber, and the interior of the spherical scintillation chamber (3) is divided into four chambers;
the gas outlet (35) and the gas inlet (36) of the scintillation chamber are respectively communicated with two adjacent chambers, except that the partition plate between the two adjacent chambers has no gas hole, gas holes are arranged between the other two adjacent chambers and are respectively connected with the chambers on the two sides, sample gas is controlled to pass through the four chambers and fully contact the chambers, and then the sample gas is discharged out of the scintillation chamber, so that the effective detection sensitive volume of alpha particles generated by radon and radon daughter is improved;
in the spherical scintillation chamber (3), two scintillation spheres formed by organic glass hemispheres coated with ZnS scintillation materials on the inner surfaces are arranged in a metal protective shell, and the inner surface of the metal shell is a reflecting layer for improving the collection efficiency of scintillation light;
the thickness of the ZnS scintillation material coating in the spherical scintillation chamber (3) is 10mg/cm2The detection efficiency of alpha particles is 100%;
the volume of the spherical scintillation chamber (3) is 0.5L;
the state display lamp (15) gives a red light flashing alarm to the working state of the whole device, and gives an alarm when the system is in at least one of the following four states: when the gas circuit works, the flow value deviates from the normal set error range; the voltage value of the lithium battery is lower than a warning value; communication with an upper computer is abnormal; the radioactivity exceeds a set threshold;
the environmental sensor includes at least one of the following sensors: temperature sensor, humidity transducer, baroceptor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921944213.4U CN212134962U (en) | 2019-11-12 | 2019-11-12 | Portable intelligent radon-thorium analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921944213.4U CN212134962U (en) | 2019-11-12 | 2019-11-12 | Portable intelligent radon-thorium analyzer |
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| Publication Number | Publication Date |
|---|---|
| CN212134962U true CN212134962U (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921944213.4U Active CN212134962U (en) | 2019-11-12 | 2019-11-12 | Portable intelligent radon-thorium analyzer |
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| Country | Link |
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2019
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