CN202362462U - Exhaust type continuous radon gas detector - Google Patents
Exhaust type continuous radon gas detector Download PDFInfo
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- CN202362462U CN202362462U CN 201120446989 CN201120446989U CN202362462U CN 202362462 U CN202362462 U CN 202362462U CN 201120446989 CN201120446989 CN 201120446989 CN 201120446989 U CN201120446989 U CN 201120446989U CN 202362462 U CN202362462 U CN 202362462U
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- scintillation chamber
- radon gas
- gas detector
- circuit module
- semisphere
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Abstract
The utility model relates to an exhaust type continuous radon gas detector mainly used for environmental monitoring and geological disaster monitoring. The exhaust type continuous radon gas detector comprises a hemispherical scintillation chamber and a cylinder shell, wherein the cylinder shell is arranged at the lower part of the hemispherical scintillation chamber; a zinc sulfide crystal layer is coated at the inner wall of the hemispherical scintillation chamber; a connecting gasket is connected between the hemispherical scintillation chamber and the cylinder shell; a cylinder base is connected below the cylinder shell; the connecting gasket is provided with a gas inlet and a gas outlet leading to the scintillation chamber; a photoelectric multiplier tube is fixed in the cylinder shell; and the cylinder base is internally provided with a signal processing circuit board for carrying out amplification and discrimination on electrons collected by an anode of the photoelectric multiplier tube, and the side wall of the cylinder base is provided with a data line for leading out a power supply and a ground line and connecting an output pulse signal of the signal processing circuit to a timer/counter of a single chip microcomputer. The exhaust type continuous radon gas detector has the advantages that the volume is large, the weight is light, the detecting space is enlarged, the detecting sensitivity is increased and the continuous monitoring for the concentration of radon gas in certain environment is realized.
Description
Technical field
The utility model relates to a kind of environmental monitoring that is mainly used in, the continuous radon gas detector of bleeder of geologic hazard monitoring.
Background technology
Radon gas is a kind of radioactivity inert gas that is prevalent in occurring in nature; The half life period of radon gas is grown (T=3.825 days); The distance of diffusion is far away, thereby can be healthy from underground effusion harm humans, and radon gas is one of 19 kinds of environmental carcinogens of the United Nations's health organization affirmation.Thereby radon gas and daughter thereof form the gasoloid contaminated air in air, and indoor radon gas mainly results from house foundation soil, contains in the radionuclide ratio higher building materials and finishing material.It mainly is the generation of bringing out lung cancer to the harm of human body.Therefore, the radon gas detection technique has vital role in geologic prospect and environmental monitoring field.
The radon gas detector mainly is the instrument that radon and radioactive daughter thereof are detected.According to measuring the occasion difference assay method of radon in the assay method of radon in the assay method of Soil Radon, the air, the water is arranged; Difference according to sample mode has bleeder and absorption type.The instrument that is applicable to radon mensuration in the air at present mainly is made up of emanometer main frame and coupongs, mainly is to measure radon and the daughter concentration thereof that coupongs collect.Precision and the sampler measured have very big relation, and each measurement all need be taken a sample earlier, is difficult to the radon gas concentration of certain point of continuous coverage.
Summary of the invention
The purpose of the utility model just is to provide a kind of continuous radon gas detector of environmental monitoring bleeder that can be used in; Its instrument volume is little, in light weight, has increased the detection space; Improved detection sensitivity, most critical is its radon gas concentration that has realized a certain environment of continuous monitoring.
The utility model adopts following technical scheme:
The inwall that the continuous radon gas detector of a kind of bleeder of the utility model comprises the semisphere scintillation chamber, be arranged on the cylindrical shell of bottom, semisphere scintillation chamber, semisphere scintillation chamber scribble be provided with between zinc sulfide crystal layer, semisphere scintillation chamber and the cylindrical shell be connected be connected with the right cylinder base below pad, the cylindrical shell, said connection pad is provided with air intake opening and the gas outlet of leading to the scintillation chamber; At the cylindrical shell internal fixation photomultiplier is arranged; Right cylinder base inside is equiped with the signal processing circuit board that the electron stream that the photomultiplier transit tube anode is collected amplifies examination, the data line of drawing power supply and ground wire and the output pulse signal of signal processing circuit board being connected to the Timer of single-chip microcomputer at the right cylinder base side wall.
The said signal processing circuit board of the utility model is made up of high-voltage power supply module, pulse amplifying circuit module and discriminator circuit module, and wherein a road of high-voltage power supply module output connects photomultiplier, and high-voltage power module is that photomultiplier provides 700V high pressure; The input end of pulse amplifying circuit module connects the signal of photoelectric tube multiplier tube output; The electron stream input pulse amplifying circuit module that photoelectric tube multiplier tube anode is collected is amplified; The output terminal of pulse amplifying circuit module connects the input end of discriminator circuit module; Give when signal surpasses a certain amplitude through, and will not pass through when being lower than this amplitude, the output terminal of discriminator circuit module is external to SCM system.
Said high-voltage power module model is GDB900, and said pulse amplifying circuit module and discriminator circuit module all are to adopt little power consumption operational amplifier ICL7641 as core devices.Said photomultiplier model is GDB-44D.
The utility model generally need connect a cover air filtration control device in use, its mainly be used for pilot-gas flow and guarantee the dry and clean of air.
The beneficial effect of the utility modelFor: the instrument of the utility model design is mainly used in the monitoring of atmospheric environment; Can satisfy the needs that the changes of contents of radon gas in the atmosphere in a certain area is carried out long-term monitoring; The design of the utility model has realized continuity of measurement; Intellectuality has the function that automatic measurement and data are preserved automatically.
The continuous radon gas detector of the utility model bleeder has than the advantage of other radon gas detecting instruments: 1. the scintillation chamber is a semisphere; Inwall is coated with full zinc sulfide crystal; Increase the collision area of sample gas and zinc sulfide crystal, improved reaction compartment greatly, improved detection sensitivity.2. can sample by continuous air extraction, can carry out long term monitoring a certain area surroundings radon gas changes of contents.3. signal sampling and treatment circuit power consumption are extremely low, are suitable for powered battery, and use for a long time in the field.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the utility model schematic block diagram;
Among the figure 1, zinc sulfide crystal layer 2, semisphere and cylindrical pad 3, cylindrical shell 4, right cylinder base 5, air intake opening 6, gas outlet 7, power lead 8, data line 9, semisphere scintillation chamber 10, the signal processing circuit board of being connected.
Embodiment
The utility model embodiment shown in accompanying drawing 1: the inwall that said radon gas detector comprises semisphere scintillation chamber 9, be arranged on the cylindrical shell 3 of 9 bottoms, semisphere scintillation chamber, semisphere scintillation chamber 9 scribble be provided with between zinc sulfide crystal layer 1, semisphere scintillation chamber 9 and the cylindrical shell 3 be connected be connected with right cylinder base 4 below pad 2, the cylindrical shell 3, said connection pad 2 is provided with air intake opening 5 and the gas outlet 6 of leading to scintillation chamber 9; At cylindrical shell 3 internal fixation photomultiplier is arranged; Right cylinder base 4 inside are equiped with the signal processing circuit board 10 that the electron stream that the photomultiplier transit tube anode is collected amplifies examination, the data line 8 of drawing power supply and ground wire 7 and the output pulse signal of signal processing circuit board 10 being connected to the Timer of single-chip microcomputer at right cylinder base 4 sidewalls.Signal processing circuit board 10 is made up of high-voltage power supply module, pulse amplifying circuit module and discriminator circuit module described in Fig. 1,2 illustrated embodiments; Wherein a road of high-voltage power supply module output connects photomultiplier; The input end of pulse amplifying circuit module connects the signal of photoelectric tube multiplier tube output; The output terminal of pulse amplifying circuit module connects the input end of discriminator circuit module, and the output terminal of discriminator circuit module is external to single-chip microcomputer.
High-tension electricity module described in the utility model embodiment provides the high pressure of 700V by 12v direct current supply to photomultiplier.The utility model design concept synoptic diagram such as accompanying drawing 2.The photomultiplier model is GDB-44D, and pulse amplifying circuit uses ICL7641 chip and resistance to form voltage negative reaction type amplifying circuit, output voltage stabilization, and the ICL7641 chip, power consumption hangs down extremely that to help adopting powered battery, the voltage gain of this circuit be 20dB.Discriminator utilizes operational amplifier ICL7641 to do voltage comparator and uses.Give when the signal that amplifier stage is sent here surpasses a certain amplitude through, and will not pass through when being lower than this amplitude.This amplitude is to change comparative voltage through regulator potentiometer, reaches the purpose of screening the different-energy pulse.
The utility model embodiment is positioned over detected space with draft tube in use; Connect direct supply, use minipump to bleed as power source, make by sample gas at the uniform velocity, equably through filtering and the dry scintillation chamber that gets into; Scintillation chamber's inwall is coated with full zinc sulphide (ZnS); After alpha radiation arrives zinc sulphide (ZnS) scintillation crystal, excite the molecule or the atom of scintillator, promptly radiate photon.The photon that scintillation crystal radiates projects the negative electrode of photomultiplier (GDB-44D), produces photoelectron.These photoelectrons are focused the back and under electric field action, project on the dynode; Produce secondary electron; First to the tenth one-level dynode interstage voltage is that successive increases identical voltage; Therefore these electronics are constantly quickened increment between dynode, produce electron stream in groups, and are collected by anode at last.On pull-up resistor, form the correspondent voltage negative pulse, this negative pulse is coupled to the input end of amplifying circuit through capacitance.Pulse amplifying circuit and discriminator circuit all are to adopt little power consumption operational amplifier ICL7641 to accomplish as core devices.Pulse amplifying circuit adopts the voltage negative feedback system, makes output voltage more stable, and this circuit voltage gain is 20dB.Discriminator utilizes operational amplifier TCL7641 to do voltage comparator and uses.Give when the signal that amplifier stage is sent here surpasses a certain amplitude through, and will not pass through when being lower than this amplitude.Send into the SCM system analysis of accounts through amplifying the signal of screening at last.
Claims (2)
1. continuous radon gas detector of bleeder is characterized in that: the inwall that said radon gas detector comprises semisphere scintillation chamber (9), be arranged on the cylindrical shell (3) of bottom, semisphere scintillation chamber (9), semisphere scintillation chamber (9) scribble be provided with between zinc sulfide crystal layer (1), semisphere scintillation chamber (9) and the cylindrical shell (3) be connected be connected with right cylinder base (4) below pad (2), the cylindrical shell (3), said connection pad (2) is provided with air intake opening (5) and gas outlet (6) of leading to scintillation chamber (9);
At cylindrical shell (3) internal fixation photomultiplier is arranged;
Right cylinder base (4) inside is equiped with the signal processing circuit board (10) that the electron stream that the photomultiplier transit tube anode is collected amplifies examination, the data line (8) of drawing power supply and ground wire (7) and the output pulse signal of signal processing circuit board (10) being connected to the Timer of single-chip microcomputer at right cylinder base (4) sidewall.
2. the continuous radon gas detector of a kind of bleeder according to claim 1; It is characterized in that: said signal processing circuit board (10) is made up of high-voltage power supply module, pulse amplifying circuit module and discriminator circuit module; Wherein a road of high-voltage power supply module output connects photomultiplier; The input end of pulse amplifying circuit module connects the signal of photoelectric tube multiplier tube output; The output terminal of pulse amplifying circuit module connects the input end of discriminator circuit module, and the output terminal of discriminator circuit module is external to SCM system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120446989 CN202362462U (en) | 2011-11-14 | 2011-11-14 | Exhaust type continuous radon gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120446989 CN202362462U (en) | 2011-11-14 | 2011-11-14 | Exhaust type continuous radon gas detector |
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| Publication Number | Publication Date |
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| CN202362462U true CN202362462U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120446989 Expired - Fee Related CN202362462U (en) | 2011-11-14 | 2011-11-14 | Exhaust type continuous radon gas detector |
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| CN (1) | CN202362462U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197339A (en) * | 2013-04-09 | 2013-07-10 | 安徽省安光环境光学工程技术研究中心有限公司 | High-precision photomultiplier signal processing circuit for scintillating medium detector |
| CN103234995A (en) * | 2013-05-03 | 2013-08-07 | 贝谷科技股份有限公司 | Method and device used for monitoring radon gas in underground water |
| CN103267975A (en) * | 2013-05-03 | 2013-08-28 | 贝谷科技股份有限公司 | Flicker-type emanometer with replaceable detector |
| CN103941275A (en) * | 2014-05-15 | 2014-07-23 | 长沙市宇驰检测技术有限公司 | Method for detecting radon in soil through scintillation chamber method |
| CN109655872A (en) * | 2019-01-29 | 2019-04-19 | 衡阳师范学院 | Fast measurement of radon device and method |
| CN109696701A (en) * | 2019-02-25 | 2019-04-30 | 衡阳师范学院 | Based on radon itself the decay quick detection device and method for inhibiting radon daughter |
| CN111638543A (en) * | 2020-05-28 | 2020-09-08 | 中国科学院近代物理研究所 | Manufacturing process of position-sensitive crystal array probe |
| EP3825735A1 (en) * | 2019-11-21 | 2021-05-26 | RadonTec GmbH | Alpha ray detector with an optical sensor for measuring radon concentration in ambient air |
| CN113341448A (en) * | 2021-05-31 | 2021-09-03 | 青海省核工业核地质研究院(青海省核工业检测试验中心) | Portable radon measuring instrument for detecting radon concentration in air of public place |
-
2011
- 2011-11-14 CN CN 201120446989 patent/CN202362462U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197339A (en) * | 2013-04-09 | 2013-07-10 | 安徽省安光环境光学工程技术研究中心有限公司 | High-precision photomultiplier signal processing circuit for scintillating medium detector |
| CN103234995A (en) * | 2013-05-03 | 2013-08-07 | 贝谷科技股份有限公司 | Method and device used for monitoring radon gas in underground water |
| CN103267975A (en) * | 2013-05-03 | 2013-08-28 | 贝谷科技股份有限公司 | Flicker-type emanometer with replaceable detector |
| CN103941275A (en) * | 2014-05-15 | 2014-07-23 | 长沙市宇驰检测技术有限公司 | Method for detecting radon in soil through scintillation chamber method |
| CN109655872A (en) * | 2019-01-29 | 2019-04-19 | 衡阳师范学院 | Fast measurement of radon device and method |
| CN109696701A (en) * | 2019-02-25 | 2019-04-30 | 衡阳师范学院 | Based on radon itself the decay quick detection device and method for inhibiting radon daughter |
| EP3825735A1 (en) * | 2019-11-21 | 2021-05-26 | RadonTec GmbH | Alpha ray detector with an optical sensor for measuring radon concentration in ambient air |
| WO2021099619A1 (en) | 2019-11-21 | 2021-05-27 | Radontec Gmbh | Alpha radiation detector having an optical sensor for measuring the radon concentration in the ambient air |
| CN111638543A (en) * | 2020-05-28 | 2020-09-08 | 中国科学院近代物理研究所 | Manufacturing process of position-sensitive crystal array probe |
| CN111638543B (en) * | 2020-05-28 | 2021-07-13 | 中国科学院近代物理研究所 | Manufacturing process of position-sensitive crystal array probe |
| CN113341448A (en) * | 2021-05-31 | 2021-09-03 | 青海省核工业核地质研究院(青海省核工业检测试验中心) | Portable radon measuring instrument for detecting radon concentration in air of public place |
| CN113341448B (en) * | 2021-05-31 | 2023-08-15 | 青海省核工业核地质研究院(青海省核工业检测试验中心) | Portable radon measuring instrument for detecting radon concentration in air in public place |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20161114 |