CN103712668A - Passive nuclear material level detector and detecting method - Google Patents
Passive nuclear material level detector and detecting method Download PDFInfo
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- CN103712668A CN103712668A CN201410028661.5A CN201410028661A CN103712668A CN 103712668 A CN103712668 A CN 103712668A CN 201410028661 A CN201410028661 A CN 201410028661A CN 103712668 A CN103712668 A CN 103712668A
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Abstract
The invention provides a passive nuclear material level detector and a detecting method, and belongs to the field of nuclear material level detection. The nuclear material level detector is used for solving the problem that as the existing nuclear material level detector comprises a radiation source, and the nuclear material level detector causes damage on personnel and environments. The nuclear material level detector provided by the invention is characterized in that a gamma radiation detector is used for acquiring gamma radiation signals in a material to be detected; the gamma radiation detector is connected to a linear pulse amplifier which is connected to a threshold value discriminator, and the threshold value discriminator is connected to a data processing module which is connected to an input unit. The passive nuclear material level detecting method provided by the invention comprises the following steps: measuring the energy of radiation rays released by the material to be measured in space environments by using the gamma radiation detector, obtaining the parameters of the material to be measured in the space according to energy change characteristics, and finally comparing the parameters with calibration parameters, thus determining whether the material level meets the standards. The massive nuclear material level detector and the detecting method provided by the invention are suitable for the detection of the level of mediums containing radionuclide.
Description
Technical field
The invention belongs to core thing position detection field.
Background technology
For many years; the core thing bit detector of domestic application is all comprised of detector, radiation source, secondary instrument three parts; what adopt mostly is active radiation source; radiation intensity is larger; user of service's safety and surrounding environment are had to certain harm; along with the development of national economy, the requirement of environmental protection is also stricter, and the thing followed is that thing position detection technique has been proposed to new more demand.
Summary of the invention
The present invention comprises radiation source in order to solve existing core thing bit detector, and the problem that personnel and environment are worked the mischief, now provides passive type core thing bit detector and detection method.
Passive type core thing bit detector, it comprises: gamma radiation detector, linear pulse amplifier, threshold value discriminator, data processing module and input block;
Gamma radiation detector is for gathering the γ radiation signal of material to be detected;
The pulse signal output end of gamma radiation detector connects the pulse signal input terminal of linear pulse amplifier, the signal input part of the amplifying signal output terminal connect threshold discriminator of linear pulse amplifier, the nucleic signal input part of the nucleic signal output part connection data processing module of threshold value discriminator, the threshold signal input end of data processing module connects the threshold signal output terminal of input block;
In described data processing module, embed the module that has software to realize, this module comprises: the unit that gathers discriminator signal; Gather the unit of threshold signal; The unit that discriminator signal and threshold signal are made comparisons; Obtain the unit of judged result.
Passive type core thing position detecting method, the method realizes based on following apparatus, and this device comprises: gamma radiation detector, linear pulse amplifier and threshold value discriminator;
The pulse signal output end of gamma radiation detector connects the pulse signal input terminal of linear pulse amplifier, the signal input part of the amplifying signal output terminal connect threshold discriminator of linear pulse amplifier;
Described passive type core thing position detecting method comprises the following steps:
Gamma radiation detector 1 is fixed on to the spacing height outside tank body to be measured, and makes gamma radiation detector 1 in the face of tank body to be measured; In described tank body to be measured, the medium containing radioactive nuclide is housed;
Step 1: the signal of detection threshold discriminator output repeatedly, until while signal output having been detected, execution step two;
Step 2: the thing position parameter of the material to be detected of receive threshold discriminator output, relatively whether this thing position parameter equates with calibrating parameters, is that the thing position that represents material in tank reaches spacing height, otherwise execution step one.
Passive type core thing bit detector of the present invention, by the radiation ray energy that in gamma radiation detector measurement space environment, substances to be measured self discharges, and whether reach calibration value according to the thing position of measured matter in its energy changing characteristics acquisition space, and then output measuring-signal.
Passive type core thing position detecting method of the present invention, by the radiation ray energy that in gamma radiation detector measurement space environment, substances to be measured self discharges, and obtain measured matter parameter in space according to its energy changing characteristics, finally this parameter and calibrating parameters are made comparisons, thereby determine whether thing position reaches standard.
Passive type core thing bit detector of the present invention and detection method, do not contact with measured object, and do not use radioactive source simultaneously, safe and reliable, can not work the mischief to personnel and environment.
Passive type core thing bit detector of the present invention and detection method, be applicable to the medium containing radioactive nuclide to carry out the detection of thing position.
Accompanying drawing explanation
Fig. 1 is the electrical structure schematic diagram of the passive type core thing bit detector described in embodiment one;
Fig. 2 is the physical construction schematic diagram of the passive type core thing bit detector described in embodiment eight;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the process flow diagram of the passive type core thing position detecting method described in embodiment ten.
Embodiment
Embodiment one: with reference to Fig. 1, illustrate present embodiment, the passive type core thing bit detector described in present embodiment, it comprises: gamma radiation detector 1, linear pulse amplifier 2, threshold value discriminator 3, data processing module 4 and input block 6;
Gamma radiation detector 1 is for gathering the γ radiation signal of material to be detected;
The pulse signal output end of gamma radiation detector 1 connects the pulse signal input terminal of linear pulse amplifier 2, the signal input part of the amplifying signal output terminal connect threshold discriminator 3 of linear pulse amplifier 2, the nucleic signal input part of the nucleic signal output part connection data processing module 4 of threshold value discriminator 3, the threshold signal input end of data processing module 4 connects the threshold signal output terminal of input block 6;
In described data processing module 4, embed the module that has software to realize, this module comprises: the unit that gathers discriminator signal; Gather the unit of threshold signal; The unit that discriminator signal and threshold signal are made comparisons; Obtain the unit of judged result.
In present embodiment, gamma radiation detector 1 comprises sodium iodide crystal and photomultiplier, gamma radiation detector 1 is caught γ particle, and convert the γ particle of catching to pulse signal, then this pulse signal is sent in linear pulse amplifier 2, linear pulse amplifier 2 amplifies this pulse signal and is sent in threshold value discriminator 3, the pulse signal that threshold value discriminator 3 amplifies linear pulse amplifier 2 carries out threshold value examination, obtain thing position parameter, and this thing position parameter is sent in data processing module 4, by input block 6, demarcate thing position parameter, data processing module 4 compares the thing position parameter of demarcating thing position parameter and 3 acquisitions of threshold value discriminator, judge whether actual thing position parameter conforms to calibrating parameters.
Embodiment two: present embodiment is that the passive type core thing bit detector described in embodiment one is described further, and in present embodiment, described detecting device also comprises: display unit 5 and output unit 7;
The display output terminal of data processing module 4 connects the display input end of display unit 5, and the switching value signal output part of data processing module 4 connects output unit 7.
Embodiment three: present embodiment is that the passive type core thing bit detector described in embodiment two is described further, and in present embodiment, described display unit 5 is group of four figures pipe.
In present embodiment, display unit shows calibrating parameters value, utilizes charactron to show numeral, more accurate and directly perceived.
Embodiment four: present embodiment is that the passive type core thing bit detector described in embodiment two is described further, and in present embodiment, output unit 7 is relay.
Embodiment five: illustrate present embodiment with reference to Fig. 2, present embodiment is that the passive type core thing bit detector described in embodiment two is described further, and in present embodiment, described detecting device also comprises: shell; This shell comprises: two end caps and housing (8);
The cylindrical structure that described housing (8) is both ends open, an end cap is opaque end cap, this opaque end cap is by one end sealing of housing (8); Another end cap is transparent end cap, and the other end of this transparent end cap and housing (8) is for removably connecting, and housing (8) is sealed;
Described gamma radiation detector 1, linear pulse amplifier 2, threshold value discriminator 3, data processing module 4, display unit 5, input block 6 and output unit 7 are all positioned at shell, described display unit 5 and transparent end cap over against.
Embodiment six: present embodiment is that the passive type core thing bit detector described in embodiment five is described further, and in present embodiment, the material of described housing (8) is aluminium.
Embodiment seven: present embodiment is that the passive type core thing bit detector described in embodiment five is described further, and in present embodiment, the material of described transparent end cap is glass.
Embodiment eight: illustrate present embodiment with reference to Fig. 2 and Fig. 3, present embodiment is that the passive type core thing bit detector described in embodiment five is described further, and in present embodiment, it also comprises: protective sleeve (9);
This protective sleeve (9) is drum type structure, in the barrel bottom center of this drum-shaped structure, has rectangular parallelepiped through hole (10), and shell inserts in protective sleeve (9) with one end of opaque end cap, and closely cooperates between the two.
Embodiment nine: present embodiment is that the passive type core thing bit detector described in embodiment eight is described further, in present embodiment, the material of described protective sleeve (9) is plumbous.
Embodiment ten: illustrate present embodiment with reference to Fig. 4, passive type core thing position detecting method described in present embodiment, the method realizes based on following apparatus, and this device comprises: gamma radiation detector 1, linear pulse amplifier 2 and threshold value discriminator 3;
The pulse signal output end of gamma radiation detector 1 connects the pulse signal input terminal of linear pulse amplifier 2, the signal input part of the amplifying signal output terminal connect threshold discriminator 3 of linear pulse amplifier 2;
Described passive type core thing position detecting method comprises the following steps:
Gamma radiation detector 1 is fixed on to the spacing height outside tank body to be measured, and makes gamma radiation detector 1 in the face of tank body to be measured; In described tank body to be measured, the medium containing radioactive nuclide is housed;
Step 1: the signal of detection threshold discriminator 3 output repeatedly, until while signal output having been detected, execution step two;
Step 2: the thing position parameter of the material to be detected of receive threshold discriminator 3 outputs, relatively whether this thing position parameter equates with calibrating parameters, is that the thing position that represents material in tank reaches spacing height, otherwise execution step one.
Claims (10)
1. passive type core thing bit detector, is characterized in that, it comprises: gamma radiation detector (1), linear pulse amplifier (2), threshold value discriminator (3), data processing module (4) and input block (6);
Gamma radiation detector (1) is for gathering the γ radiation signal of material to be detected;
The pulse signal output end of gamma radiation detector (1) connects the pulse signal input terminal of linear pulse amplifier (2), the signal input part of the amplifying signal output terminal connect threshold discriminator (3) of linear pulse amplifier (2), the nucleic signal input part of the nucleic signal output part connection data processing module (4) of threshold value discriminator (3), the threshold signal input end of data processing module (4) connects the threshold signal output terminal of input block (6);
In described data processing module (4), embed the module that has software to realize, this module comprises: the unit that gathers discriminator signal; Gather the unit of threshold signal; The unit that discriminator signal and threshold signal are made comparisons; Obtain the unit of judged result.
2. passive type core thing bit detector according to claim 1, is characterized in that, described detecting device also comprises: display unit (5) and output unit (7);
The display output terminal of data processing module (4) connects the display input end of display unit (5), and the switching value signal output part of data processing module (4) connects output unit (7).
3. passive type core thing bit detector according to claim 2, is characterized in that, described display unit (5) is group of four figures pipe.
4. passive type core thing bit detector according to claim 2, is characterized in that, output unit (7) is relay.
5. passive type core thing bit detector according to claim 2, is characterized in that, described detecting device also comprises: shell; This shell comprises: two end caps and housing (8);
The cylindrical structure that described housing (8) is both ends open, an end cap is opaque end cap, this opaque end cap is by one end sealing of housing (8); Another end cap is transparent end cap, and the other end of this transparent end cap and housing (8) is for removably connecting, and housing (8) is sealed;
Described gamma radiation detector (1), linear pulse amplifier (2), threshold value discriminator (3), data processing module (4), display unit (5), input block (6) and output unit (7) are all positioned at shell, described display unit (5) and transparent end cap over against.
6. passive type core thing bit detector according to claim 5, is characterized in that, the material of described housing (8) is aluminium.
7. passive type core thing bit detector according to claim 5, is characterized in that, the material of described transparent end cap is glass.
8. passive type core thing bit detector according to claim 5, is characterized in that, it also comprises: protective sleeve (9);
This protective sleeve (9) is drum type structure, in the barrel bottom center of this drum-shaped structure, has rectangular parallelepiped through hole (10), and shell inserts in protective sleeve (9) with one end of opaque end cap, and closely cooperates between the two.
9. passive type core thing bit detector according to claim 8, is characterized in that, the material of described protective sleeve (9) is plumbous.
10. passive type core thing position detecting method, is characterized in that, the method realizes based on following apparatus, and this device comprises: gamma radiation detector (1), linear pulse amplifier (2) and threshold value discriminator (3);
The pulse signal output end of gamma radiation detector (1) connects the pulse signal input terminal of linear pulse amplifier (2), the signal input part of the amplifying signal output terminal connect threshold discriminator (3) of linear pulse amplifier (2);
Described passive type core thing position detecting method comprises the following steps:
Gamma radiation detector (1) is fixed on to the spacing height outside tank body to be measured, and makes gamma radiation detector (1) in the face of tank body to be measured; In described tank body to be measured, the medium containing radioactive nuclide is housed;
Step 1: the signal of detection threshold discriminator (3) output repeatedly, until while signal output having been detected, execution step two;
Step 2: the thing position parameter of the material to be detected of receive threshold discriminator (3) output, relatively whether this thing position parameter equates with calibrating parameters, is that the thing position that represents material in tank reaches spacing height, otherwise execution step one.
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| CN201410028661.5A CN103712668B (en) | 2014-01-22 | 2014-01-22 | Passive type core material level detector and detection method |
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| CN104390677A (en) * | 2014-11-08 | 2015-03-04 | 胡桂标 | Background radiation correction measurement method and system of passive nuclear material level gauge |
| CN104614043A (en) * | 2015-02-09 | 2015-05-13 | 茂通科技（北京）有限公司 | Detection system and production line for detecting liquid level in sealing tank |
| CN105486379A (en) * | 2015-12-30 | 2016-04-13 | 黑龙江省科学院技术物理研究所 | Method for measuring material level through reflecting and scattering of adjustable high energy X-ray |
| CN105549063A (en) * | 2015-12-30 | 2016-05-04 | 黑龙江省中贝技术有限公司 | Detection method realized by use of plastic scintillator detector |
| CN105547409A (en) * | 2015-12-30 | 2016-05-04 | 黑龙江省科学院技术物理研究所 | Passive nuclear material level measurement device and method |
| CN106249271A (en) * | 2016-07-21 | 2016-12-21 | 福州智元仪器设备有限公司 | A kind of logging and radiation dose security audit method based on logging |
| CN109405926A (en) * | 2018-12-06 | 2019-03-01 | 北京金德创业测控技术有限公司 | Radioactive instrument measures material position, the method for density using Radioactive instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109405926A (en) * | 2018-12-06 | 2019-03-01 | 北京金德创业测控技术有限公司 | Radioactive instrument measures material position, the method for density using Radioactive instrument |
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Inventor after: Zhao Xiaowen Inventor after: Gao Yajuan Inventor after: Li Beicheng Inventor after: Wan Zhiwei Inventor after: Pan Zhikui Inventor before: Li Beicheng Inventor before: Zhao Xiaowen Inventor before: Wu Ke Inventor before: Gao Yajuan Inventor before: Qin Guohui Inventor before: Pan Zhikui |
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