CN106324650A - Environmental radiation dose detector - Google Patents
Environmental radiation dose detector Download PDFInfo
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- CN106324650A CN106324650A CN201510372511.0A CN201510372511A CN106324650A CN 106324650 A CN106324650 A CN 106324650A CN 201510372511 A CN201510372511 A CN 201510372511A CN 106324650 A CN106324650 A CN 106324650A
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Abstract
The invention relates to an environmental radiation dose detector. The environmental radiation dose detector comprises a DC/DC converter module; the input end of the DC/DC converter module is connected with an external power source; the output ends of the DC/DC converter module are connected with the input end of a high-voltage power source module and the input end of a preamplifying unit respectively; the output end of the high-voltage power source module is connected with the input end of a radiation sensor; the output end of the radiation sensor is connected with the input end of the preamplifying unit; the output end of the preamplifying unit is connected with a shielded cable; the radiation sensor is a high-pressure spherical ionization chamber; the high-pressure spherical ionization chamber comprisess an outer spherical crown; the outer spherical crown is provided with a detector interface and an air inflation and exhaust pipe; at least three inner spherical crowns are arranged in the outer spherical crown, wherein one of the inner spherical crowns is connected with an electric conduction electrode in the detector interface through an electric conductive tube, and the other inner spherical crowns are connected with the inner spherical crown connected with the detector interface through electric conductive tubes; and the electric conduction electrode is surrounded by two ceramic triaxial sealing heads. The environmental radiation dose detector of the invention has the advantages of small size, high sensitivity, good energy response and high suitability for industrial field.
Description
Technical field
The present invention relates to a kind of radiation protection field, particularly relate to a kind of ambient level x radiation x Dose rate measurement that is applied to
Detector.
Background technology
One importance of environmental radiation dose rate monitoring room environmental monitoring, by monitoring atmospheric environment X-ray radiation quantity X in real time
Amount, the radiant intensity of radioactive substance in acquisition environment, the radiogical safety of monitoring of environmental, can for ensuring personal safety offer
By foundation.
Especially in special industry, such as hospital's CT Room, use uclear scale, belted electronic balance, nuclear level sensing device, nucleon
Online coal ash analyzer etc. has the environment of core radioactive element, it is necessary to the safety of personnel near ensureing, it is necessary to monitoring in real time
The middle roentgendosis of environment, if roentgendosis is excessive, will cause injury greatly to the person of neighbouring personnel.
Traditional environmental radiation dose rate detector mainly uses the ray detector of GM form of tubes and penetrating of NaI crystal form
Ray in environment is monitored by line detector in real time, but above two detector has the disadvantage in that penetrating of GM form of tubes
The detection efficient of line detector is low, typically just uses in the case of high dose rate；The ray detector of NaI crystal form
Using photomultiplier transit tubular construction, although its detection efficient is high, but its fearness is fallen, and is only applicable to the field that the vibratilities such as laboratory are less
Closing, the industry spot bigger for vibratility but cannot be suitable for.
Summary of the invention
It is an object of the invention to provide a kind of environmental radiation dose detector, it is high that it has sensitivity (detection efficient), energy
Respond, measurement lower limit can as little as 50keV, good linearity, the advantage that linearity measuring range improves more than 50 times.
For achieving the above object, the present invention is by the following technical solutions:
A kind of environmental radiation dose detector, including DC/DC modular converter, high-voltage power module, radiation transducers and front
Put big unit, the input of described DC/DC modular converter is connected with external power source, its outfan respectively with high voltage power supply mould
The input of block is connected with the input of pre-amplifier unit, the outfan of high-voltage power module and the input of radiation transducers
Being connected, the outfan of radiation transducers is connected with the input of pre-amplifier unit, the outfan of pre-amplifier unit and shielding
Cable is connected；Described radiation transducers is hyperbar spheric (ionization) chamber, and hyperbar spheric (ionization) chamber includes outer spherical crown, at ectosphere
Labeling and be provided with detector interface and inflation exhaustor, arrange spherical crown at least three outside in spherical crown, in one of them, spherical crown leads to
Crossing contact tube to be connected with the conductive electrode in prober interface, in other, spherical crown all by contact tube and is connected with prober interface
Interior spherical crown is connected, and described conductive electrode wraps around and is provided with double ceramic three co-axial seal heads.
Described interior spherical crown is hollow ball.
Described interior spherical crown is evenly distributed in inside outer spherical crown, and the centre of sphere of each interior spherical crown is the most equal to the distance of outer spherical crown inwall.
The number of described interior spherical crown is five, and the centre of sphere of five interior spherical crowns is the most equal to the distance of outer spherical crown inwall, five interior balls
Hat is respectively spherical crown in first, spherical crown in second, spherical crown in the 3rd, spherical crown, spherical crown in first in spherical crown and the 5th in the 4th
It is connected with the conductive electrode in prober interface by contact tube, spherical crown in second, spherical crown in the 3rd, spherical crown and the 5th in the 4th
Interior spherical crown is all connected by spherical crown in contact tube and first.
The material of described outer spherical crown and interior spherical crown is 1Cr18Ni9Ti rustless steel.
The stainless thickness of 1Cr18Ni9Ti is 0.8mm～2.2mm.
The stainless thickness of 1Cr18Ni9Ti is 1mm～2mm.
Internal institute of described hyperbar spheric (ionization) chamber inflatable body is high purity argon.
The internal diameter of described inflation exhaustor is at least 2mm, and the internal diameter of contact tube is at least 3.8mm.
Described outer spherical crown, inflation exhaustor and detection joint all use sealing welding, are means of spot welds between interior spherical crown.
In the prior art, most of hyperbar spheric (ionization) chamber, use rustless steel to make, but its measurement lower limit is high,
Ray ability could prepare to measure at more than 80keV, when needing the x radiation x measuring below 80keV, needs to use spy
Different material makes, and aluminum, aluminium alloy such as high-transmission rate just can complete, and the present invention is by inside to hyperbar spheric (ionization) chamber
The upgrading of structure changes, and uses common stainless steel and other rigidity material, can make measurement lower limit value as little as 50keV, i.e. adopt
Having sensitivity (detection efficient) by the present invention of such scheme high, energy response is good, the advantage of good linearity, and this
Bright volume is little, portable, it is adaptable to industry spot.
Accompanying drawing explanation
Fig. 1 is the composition structure chart of a kind of environmental radiation dose detector embodiment that the present invention provides.
The structural representation of Tu2Shi Tu1Zhong hyperbar spheric (ionization) chamber.
Fig. 3 is that the A-A of Fig. 2 is to sectional view.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly and completely
Describe, it is clear that described embodiment is only the embodiment of a present invention part rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
As shown in Figure 1, Figure 2 and Figure 3, a kind of environmental radiation dose detector embodiment that the present invention provides includes DC/DC
Modular converter, high-voltage power module, radiation transducers and pre-amplifier unit, the input of described DC/DC modular converter
Being connected with external power source, its outfan is connected with the input of high-voltage power module and the input of pre-amplifier unit respectively,
The outfan of high-voltage power module is connected with the input of radiation transducers, the outfan of radiation transducers and pre-amplifier unit
Input be connected, the outfan of pre-amplifier unit is connected with shielded cable；Described radiation transducers is the spherical electricity of hyperbar
From room, hyperbar spheric (ionization) chamber includes outer spherical crown 1, and spherical crown 1 is provided with detector interface and inflation exhaustor 2 outside,
The interior spherical crown arranged in spherical crown 1 outside, interior spherical crown is hollow ball, and the number of described interior spherical crown is 5, and five interior spherical crowns divide
It is not spherical crown 10 in spherical crown 9 and the 5th in spherical crown the 8, the 4th in spherical crown the 7, the 3rd in spherical crown 6, second in first, first
Interior spherical crown 6 is connected with the conductive electrode 4 in prober interface by contact tube 3, spherical crown 8 in spherical crown the 7, the 3rd in second,
In 4th, spherical crown 9 is all connected with spherical crown in first 6 by contact tube 3 with spherical crown 10 in the 5th, outside described conductive electrode 4
Side is surrounded with double ceramic three co-axial seal heads 5.About the number of interior spherical crown, designer can according to actual needs, will
The number of interior spherical crown is set to 3,4,6, or the number of interior spherical crown is set to not less than 3 arbitrarily the most whole
Several, as the distribution in interior spherical crown spherical crown outside, equiblibrium mass distribution is preferable, and the centre of sphere of each interior spherical crown is to outer spherical crown inwall
Distance is the most equal, and in one of them, spherical crown is connected with the conductive electrode 4 in prober interface by contact tube 3, spherical crown in other
All it is connected by contact tube 3 and the interior spherical crown being connected with prober interface；Internal institute of described hyperbar spheric (ionization) chamber inflatable body
For high purity argon, outer spherical crown 1, inflation exhaustor 2 and detection joint all use sealing welding, for spot welding between interior spherical crown
Connect.In the case of other condition is selected, because of the setting of spherical crown interior in the present embodiment, adds plate electrode size, and reduce
The distance of two interpolars, thus promote energy response performance of knowing clearly.
Improvement as the present invention: the material of described outer spherical crown 1 and interior spherical crown is 1Cr18Ni9Ti rustless steel, and generally
The aluminium material used is compared, and rustless steel is easy to make and low cost；Designer can be set to 2mm by stainless thickness, removes
Outside this, designer also according to be actually needed stainless thickness is set to 0.7mm, 0.8mm, 1mm, 1.2mm, 1.5mm,
1.8mm, 1.9mm, 2.1mm, 2.2mm, 2.3mm, certainly, designer is also dependent on being actually needed stainless thickness
Degree is arranged between 0.7mm～2.3mm.
The internal diameter of described inflation exhaustor 2 is 3mm, and in addition, designer will inflate exhaustor also according to being actually needed
The internal diameter of 2 is set to 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.5mm, 4mm, and certainly, designer also can root
It is set to not less than 2mm according to the internal diameter being actually needed inflation exhaustor 2；The internal diameter of contact tube 3 is 5mm, in addition,
Designer also according to be actually needed the internal diameter of contact tube 3 is set to 3.5mm, 3.8mm, 4.5mm, 4.8mm, 5.2mm,
5.5mm, certainly, designer is set to not less than 3.5mm also dependent on the internal diameter being actually needed contact tube 3.
The operation principle of the present invention is as follows: as it is shown in figure 1, a kind of environmental radiation dose detector embodiment that the present invention provides
Including DC/DC modular converter, high-voltage power module, radiation transducers and pre-amplifier unit, described DC/DC modulus of conversion
The input of block is connected with external power source, its outfan defeated with the input of high-voltage power module and pre-amplifier unit respectively
Entering end to be connected, the outfan of high-voltage power module is connected with the input of radiation transducers, and the outfan of radiation transducers is with front
The input putting big unit is connected, and the outfan of pre-amplifier unit is connected with shielded cable；External power source can use direct current
Voltage 12V (DC12V), it is possible to use DC8V, external power source gives the present embodiment internal electricity after DC/DC modular converter is changed
Road uses；Ionization signal is adjusted to DC-1V～DC5V voltage signal through the pre-amplification circuit that ultralow input is inclined, and this voltage is believed
The signal input part of ray measuring instrument number it is connected to by shielded cable.
The principle of the hyperbar spheric (ionization) chamber in the present invention is as follows: x radiation x gas in hyperbar spheric (ionization) chamber
In, with the medium interaction in gas, producing secondary electron, these electronics make the atom in gas on its movement locus
Ionization, produces a series of negative ions pair, and under electric field action, electronics, cation drift about to two-stage respectively, form ionization
Electric current, this electric current is proportional to the amount of radiation of outer rays.
In order to meet succinct requirement, the explanation of this specification each some importance is the difference with other parts, each portion
/ an identical similar portion can cross-reference.Described above to the disclosed embodiments, makes professional and technical personnel in the field
It is capable of or uses the present invention.
Claims (10)
1. an environmental radiation dose detector, it is characterised in that: include DC/DC modular converter, high-voltage power module, ray
Sensor and pre-amplifier unit, the input of described DC/DC modular converter is connected with external power source, its outfan
It is connected with the input of high-voltage power module and the input of pre-amplifier unit respectively, the outfan of high-voltage power module
Being connected with the input of radiation transducers, the outfan of radiation transducers is connected with the input of pre-amplifier unit, front
The outfan putting big unit is connected with shielded cable；Described radiation transducers is hyperbar spheric (ionization) chamber, hyperbar
Spheric (ionization) chamber includes outer spherical crown (1), and spherical crown (1) is provided with detector interface and inflation exhaustor (2) outside,
Arranging spherical crown at least three in spherical crown (1) outside, in one of them, spherical crown is connect with detector by contact tube (3)
Conductive electrode (4) in Kou is connected, and in other, spherical crown is all by contact tube (3) and the interior ball that is connected with prober interface
Hat is connected, and described conductive electrode (4) wraps around and is provided with double ceramic three co-axial seal heads (5).
Environmental radiation dose detector the most according to claim 1, it is characterised in that: described interior spherical crown is hollow ball.
Environmental radiation dose detector the most according to claim 2, it is characterised in that: described interior spherical crown equiblibrium mass distribution is outside
Spherical crown (1) is internal, and the centre of sphere of each interior spherical crown is the most equal to the distance of outer spherical crown inwall.
Environmental radiation dose detector the most according to claim 2, it is characterised in that: the number of described interior spherical crown is five,
The centre of sphere of five interior spherical crowns is the most equal to the distance of outer spherical crown inwall, five interior spherical crowns be respectively first in spherical crown (6),
Spherical crown (7) in second, spherical crown (8) in the 3rd, spherical crown (10) in spherical crown (9) and the 5th in the 4th, in first
Spherical crown (6) is connected with the conductive electrode (4) in prober interface by contact tube (3), spherical crown (7) in second,
Spherical crown (8) in 3rd, in the 4th in spherical crown (9) and the 5th spherical crown (10) all by contact tube (3) and first
Spherical crown (6) is connected.
Environmental radiation dose detector the most according to claim 1, it is characterised in that: described outer spherical crown (1) and interior spherical crown
Material be 1Cr18Ni9Ti rustless steel.
Environmental radiation dose detector the most according to claim 4, it is characterised in that: the stainless thickness of 1Cr18Ni9Ti
For 0.8mm～2.2mm.
Environmental radiation dose detector the most according to claim 5, it is characterised in that: the stainless thickness of 1Cr18Ni9Ti
For 1mm～2mm.
8. according to the arbitrary described environmental radiation dose detector of claim 1～6, it is characterised in that: the spherical electricity of described hyperbar
From chamber interior institute, inflatable body is high purity argon.
9. according to the arbitrary described environmental radiation dose detector of claim 1～6, it is characterised in that: described inflation exhaustor (2)
Internal diameter be at least 2mm, the internal diameter of contact tube (3) is at least 3.8mm.
10. according to the arbitrary described environmental radiation dose detector of claim 1～6, it is characterised in that: described outer spherical crown (1),
Inflation exhaustor (2) and detection joint all use sealing welding, are means of spot welds between interior spherical crown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510372511.0A CN106324650B (en) | 2015-06-30 | 2015-06-30 | A kind of environmental radiation dose detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510372511.0A CN106324650B (en) | 2015-06-30 | 2015-06-30 | A kind of environmental radiation dose detector |
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| Publication Number | Publication Date |
|---|---|
| CN106324650A true CN106324650A (en) | 2017-01-11 |
| CN106324650B CN106324650B (en) | 2019-07-19 |
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| CN201510372511.0A Expired - Fee Related CN106324650B (en) | 2015-06-30 | 2015-06-30 | A kind of environmental radiation dose detector |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873445A (en) * | 1985-04-29 | 1989-10-10 | Centre National De La Recherche Scientifique | Source of ions of the triode type with a single high frequency exitation ionization chamber and magnetic confinement of the multipole type |
| JP2008180585A (en) * | 2007-01-24 | 2008-08-07 | Toshiba Corp | Sphere-shaped ionization chamber detector |
| CN102608646A (en) * | 2008-03-05 | 2012-07-25 | 清华大学 | Detector device for radiation monitoring |
| CN103311086A (en) * | 2012-03-15 | 2013-09-18 | 中国原子能科学研究院 | Multi-layer cavity ionization chamber |
| CN103472476A (en) * | 2013-09-16 | 2013-12-25 | 中国船舶重工集团公司第七一九研究所 | Detector for monitoring environmental radiation dose rate |
| CN104319222A (en) * | 2014-10-29 | 2015-01-28 | 中国原子能科学研究院 | Standard high-pressure ionization chamber and manufacturing method thereof |
-
2015
- 2015-06-30 CN CN201510372511.0A patent/CN106324650B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873445A (en) * | 1985-04-29 | 1989-10-10 | Centre National De La Recherche Scientifique | Source of ions of the triode type with a single high frequency exitation ionization chamber and magnetic confinement of the multipole type |
| JP2008180585A (en) * | 2007-01-24 | 2008-08-07 | Toshiba Corp | Sphere-shaped ionization chamber detector |
| CN102608646A (en) * | 2008-03-05 | 2012-07-25 | 清华大学 | Detector device for radiation monitoring |
| CN103311086A (en) * | 2012-03-15 | 2013-09-18 | 中国原子能科学研究院 | Multi-layer cavity ionization chamber |
| CN103472476A (en) * | 2013-09-16 | 2013-12-25 | 中国船舶重工集团公司第七一九研究所 | Detector for monitoring environmental radiation dose rate |
| CN104319222A (en) * | 2014-10-29 | 2015-01-28 | 中国原子能科学研究院 | Standard high-pressure ionization chamber and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 梅雪松 等: "高气压电离室射线剂量探测器的设计", 《黑龙江科学》 * |
| 高飞 等: "高气压电离室陆地γ射线响应的蒙卡方法研究", 《2013无线电、电离辐射计量与检测学术交流会论文集》 * |
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