CN107728192A - The nuclide identifier system and method for multi-detector - Google Patents
The nuclide identifier system and method for multi-detector Download PDFInfo
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- CN107728192A CN107728192A CN201710914625.2A CN201710914625A CN107728192A CN 107728192 A CN107728192 A CN 107728192A CN 201710914625 A CN201710914625 A CN 201710914625A CN 107728192 A CN107728192 A CN 107728192A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/36—Measuring spectral distribution of X-rays or of nuclear radiation spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/36—Measuring spectral distribution of X-rays or of nuclear radiation spectrometry
- G01T1/361—Measuring spectral distribution of X-rays or of nuclear radiation spectrometry with a combination of detectors of different types, e.g. anti-Compton spectrometers
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- Spectroscopy & Molecular Physics (AREA)
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- High Energy & Nuclear Physics (AREA)
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Abstract
The present invention relates to radioactive source technical field, and in particular to the nuclide identifier system and method for a kind of multi-detector, the system include terminal and multiple detectors, and the terminal is all connected with multiple detectors, and each detector is used to detect radioactive sample.Each detector is used to receive the gamma-rays of the radioactive sample transmitting and produces pulse signal, and generates power spectrum according to the pulse signal, and each detector is analyzed to send to terminal after obtaining respective analytical parameters to the power spectrum of each self-generating.And then the terminal calculates the possible coefficient of presence of every kind of nucleic in the radioactive sample according to pre-defined algorithm according to multiple analytical parameters.This programme is analyzed by the analytical parameters of the radioactive sample gathered to multiple detectors, with nucleic present in the comprehensive descision radioactive sample, make it that testing result is more accurate.
Description
Technical field
The present invention relates to radioactive source technical field, nuclide identifier system and side in particular to a kind of multi-detector
Method.
Background technology
At present, Spectrum acquisition is carried out using gamma radiation detector, it is extensive so as to carry out the method for radionuclide analysis
With.This kind of method generally first carries out the collection of article gamma spectrum to be measured with gamma radiation detector, is believed according to the power spectrum collected
Breath, carry out the technologies such as characteristic peak analysis and draw nuclide identification conclusion.
System for needing enzyme rapidly and sensitively to identify gamma activity nucleic, often dispose multiple γ radiation detections simultaneously
Device, to detect the gamma-rays of diverse location, improve the accuracy of the final nuclide identification result of system.If system has been used multiple
Gamma radiation detector, multiple power spectrums may be produced for a sample detection, the Radionuclide analysis based on different power spectrums may
There are different conclusions.
When sample only it is of short duration be in detecting system or relatively low sample activity when, may only have segment detector can be according to collection
Power spectrum correctly identifies nucleic, and remaining detector the phenomenon of leak detection or misrecognition occurs because of power spectrum accumulation deficiency；When sample bag
During containing a variety of nucleic, identification difficulty rises, and presumable detector can identify whole nucleic, and some detectors can only identification division
Nucleic, some detectors can not identify nucleic completely, because power spectrum becomes complicated under more nucleic, even if having used special processing
Technology, nuclide identification precision may be still affected, and the nuclide identification degree of accuracy of single detector in this case is tested.
The collection power spectrum of multiple detectors how is reasonably used, accurate gamma activity Radionuclide analysis conclusion is drawn, is
One problem.It is primarily upon how lifting the Radionuclide analysis ability to single power spectrum in industry at present, but to multiple detectors
Shortcoming is compared in the research that multiple power spectrums carry out comprehensive analysis, and the advantage of more gamma radiation detector systems is not brought into play completely.
The content of the invention
It is an object of the invention to provide a kind of nuclide identifier system of multi-detector and method, by using multiple detections
Device detects to radioactive sample, to realize the classification for more accurately judging nucleic.
To achieve these goals, the technical scheme that the embodiment of the present invention uses is as follows：
In a first aspect, the embodiments of the invention provide a kind of nuclide identifier system of multi-detector, the system is included eventually
End and multiple detectors, the terminal are all connected with multiple detectors, and each detector is used to carry out radioactive sample
Detection, the system include：
Each detector is used for the pulse signal for receiving the radioactive sample transmitting, and according to the pulse signal
Generate power spectrum；
Each detector is analyzed to obtain respective analytical parameters to the power spectrum of each self-generating；
Each detector sends corresponding analytical parameters to the terminal；
The terminal calculates depositing for every kind of nucleic in the radioactive sample according to pre-defined algorithm according to multiple analytical parameters
In possible coefficient.
Second aspect, the embodiment of the present invention additionally provide a kind of nuclide identification method of multi-detector, applied to terminal, institute
State terminal to be all connected with multiple detectors, each detector is used to detect radioactive sample, and methods described includes：
The analytical parameters that each detector is sent are received, the analytical parameters receive the radiation by the detector
Property electromagnetic radiation gamma-rays generation power spectrum and according to the energy spectrum analysis obtain；
Calculating the presence of every kind of nucleic in the radioactive sample according to multiple analytical parameters according to pre-defined algorithm may be
Number.
The nuclide identifier system and method for a kind of multi-detector provided in an embodiment of the present invention, the system include terminal and
Multiple detectors, the terminal are all connected with multiple detectors, and each detector is used to detect radioactive sample.Each
The detector is used for the gamma-rays for receiving the radioactive sample transmitting, and pulse signal is given birth to according to caused by the gamma-rays
Into power spectrum, each detector is analyzed to send to terminal after obtaining respective analytical parameters to the power spectrum of each self-generating.Enter
And the presence that the terminal calculates every kind of nucleic in the radioactive sample according to pre-defined algorithm according to multiple analytical parameters may
Coefficient.This programme is analyzed by the analytical parameters of the radioactive sample gathered to multiple detectors, and with comprehensive descision, this is put
Nucleic present in penetrating property sample, make it that testing result is more accurate.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows a kind of schematic diagram of the nuclide identifier system of multi-detector provided in an embodiment of the present invention.
Fig. 2 shows a kind of schematic flow sheet of the nuclide identification method of multi-detector provided in an embodiment of the present invention.
Fig. 3 shows the schematic flow sheet of the nuclide identification method of another multi-detector provided in an embodiment of the present invention.
Diagram：100- detectors；200- networks；300- terminals.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be configured to arrange and design with a variety of herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
In the prior art, radioactive sample is detected usually using single detector, but it is special at some
In the case of can not detect nucleic species in radioactive sample exactly using single detector.Such as：When radioactive sample
It can briefly be in detecting system, because the time that detector can detect is shorter, then may cause the feature energy peak of collection
Unobvious so that nucleic classification can not be accurately identified.When radioactive sample is low-activity radioactive sample, then may also cause
The feature energy peak unobvious of detector collection, therefore nucleic classification can not be identified exactly.When radioactive sample includes a variety of radiation
Property material when, the spectral information collected due to single detector is complicated, and identification difficulty is big, or even leakage identification, misrecognition be present
Situation, therefore, can not more clearly identify nucleic classification present in radioactive sample.Even if having in the prior art more
The situation that individual detector detects simultaneously, when later data analyzes and processes, and individually enters to the power spectrum of each detector
Row analyzing and processing, it is impossible to it is comprehensive to be analyzed using the result of detection of each detector, in essence, or using single
Detector radioactive sample is detected, accuracy is relatively low.
Thus, the embodiment of the present invention provides a kind of nuclide identifier system of multi-detector, by being gathered to multiple detectors
Power spectrum carry out comprehensive analysis, accurately to identify the nucleic classification in radioactive sample.
Fig. 1 is refer to, is a kind of structural representation of the nuclide identifier system of multi-detector provided in an embodiment of the present invention.
The nuclide identifier system of the multi-detector includes terminal 300 and multiple detectors 100, the terminal 300 by network 200 with it is multiple
Detector 100 is all connected with.In embodiments of the present invention, the terminal 300 may be, but not limited to, mobile phone, computer, processor or
Other Intelligent treatment equipment.The detector 100 is gamma radiation detector, is mainly used in detecting gamma ray radiator, in other words
Say, the radioactive sample is gamma ray radiator.
When being detected to radioactive sample, multiple detectors 100 are distributed in around the radioactive sample, this is more
Individual 100 specific placement location of detector can be arranged symmetrically according to the radioactive sample, it is readily appreciated that, the plurality of detector
100 position can be configured as needed.More preferably, the parameter of the multiple detectors 100 detected is consistent, such as multiple
The species of detector 100 is consistent, similar nature, high voltage parameter are close etc..It is readily appreciated that, multiple detectors 100 are to radioactivity sample
The start and end time of the detection of product should also be arranged to the identical period.
Each detector 100 is used to detect radioactive sample, is the gamma-rays for receiving radioactive sample transmitting.The detection
The core component Digital Spectrometer of device 100 will generate power spectrum according to the gamma-rays of reception, and to using background rejection technology, feature
Peak fitting technique obtains analytical parameters to energy spectrum analysis, and the analytical parameters are net counting rate, nucleic classification, nucleic confidence level.Its
In, net counting rate is obtained by background rejection technical Analysis, due to γ radioactive ray in environment be present, therefore, it is necessary to passes through background
Deduction technology deducts the influence of environmental factor in the pulse signal collected, obtains of the pulse signal from radioactive sample
Number, as net counting rate.In addition, analyze to obtain nucleic classification and nucleic confidence level by characteristic peak fitting technique.
The detection of same radioactive sample is illustrated with three detectors 100 below, these three detectors 100 divide
Wei not the first detector, the second detector and the 3rd detector.
The net counting rate that first detector is analyzed to obtain is 500, wherein the nucleic classification detected is two kinds, respectively core
Plain a and nucleic b, wherein the confidence level that analysis obtains nucleic a is 20%, nucleic b confidence level is 80%.
The net counting rate that second detector is analyzed to obtain is 1000, wherein the nucleic classification detected is two kinds, is respectively
Nucleic b and nucleic c, wherein the confidence level that analysis obtains nucleic b is 80%, nucleic c confidence level is 10%.
The net counting rate that 3rd detector is analyzed to obtain is 500, wherein the nucleic classification detected is one kind, it is nucleic c,
Its confidence level is 60%.
The analytical parameters that the plurality of detector 100 will obtain to energy spectrum analysis, including net counting rate, nucleic classification, nucleic
Confidence level, send in the lump to terminal 300.
The terminal 300 is further analyzed the analytical parameters of reception, is specifically included：The terminal 300 is according to pre- set pattern
The net counting rate factor, nucleic confidence factor are then determined respectively, and in embodiments of the present invention, the net counting rate factor and nucleic are put
Belief factor is determined by the rule of thumb, it is readily appreciated that, the net counting rate factor and nucleic confidence factor can be with
Formulate by other means.Wherein, in embodiments of the present invention, its formulation mode is：Due to only having the first detector to detect
Nucleic a, and net counting rate corresponding to nucleic a is 500, corresponding confidence level is 20%, then the nucleic a net counting rate factor is 5,
Nucleic confidence factor is 0.2.In addition, the first detector also detects nucleic b, and net counting rate corresponding to nucleic b is 500,
Corresponding confidence level is 80%, meanwhile, the second detector also detects nucleic b, net corresponding to nucleic b in the second detector
Counting rate is 1000, and corresponding confidence level is 80%, then integrates the result of the first detector and the second detector, and nucleic b is corresponding
Net counting rate and for 1500, corresponding confidence level and be 160%, then the net counting rate factor corresponding to nucleic b is 15, and nucleic is put
Belief factor is 1.6.It can similarly obtain, the nucleic c net count factor is 15, and nucleic confidence factor is 0.7.
In addition, the number that the terminal 300 is detected according to the every kind of nucleic of the analytical parameters of reception statistics, and according to predetermined
Algorithm determines the nucleic number of repetition factor.Because the nucleic classification that the first detector detects is nucleic a and nucleic b, second visits
It is nucleic b and nucleic c to survey the nucleic classification that device detects, and the nucleic classification that the 3rd detector detects is nucleic c.Therefore nucleic
A is detected once, then the nucleic number of repetition factor corresponding to nucleic a is 1, and nucleic b is detected twice, then nucleic b is corresponding
The nucleic number of repetition factor be 2, nucleic c is detected twice, then the nucleic number of repetition factor corresponding to nucleic c be 2.
Further, the terminal 300 is by the net count factor of determination, nucleic confidence factor and the nucleic number of repetition factor
Be multiplied to calculate respectively every kind of nucleic presence may coefficient, to judge possibility that every kind of nucleic occurs in radioactive sample
Property.Learnt by calculating, the nucleic a net counting rate factor is 5, nucleic confidence factor is 0.2, the nucleic number of repetition factor is
1, then the possible coefficient of nucleic a presence is 1.The nucleic b net counting rate factor is 15, nucleic confidence factor is 1.6, nucleic
The number of repetition factor is 2, then the possible coefficient of nucleic b presence is 48.The nucleic c net counting rate factor is 15, nucleic confidence
The degree factor is 0.7, the nucleic number of repetition factor is 2, then the possible coefficient of nucleic c presence is 21.It is also pre-stored in the terminal 300
Predetermined threshold, if exist may coefficient be less than the predetermined threshold, this, which is existed, to be deleted nucleic corresponding to coefficient, remaining
Nucleic then be radioactive sample in nucleic that may be present.If predetermined threshold is 5, because nucleic a presence may coefficient
For 1, less than 5, show there is that nucleic a is relatively low in radioactive sample, then delete nucleic a, to obtain final sumbission,
There is a possibility that nucleic b and nucleic c are larger in radioactive sample.
For convenience more intuitively show result, be also stored with the terminal 300 it is multiple probability be present, probability each be present
Corresponding one has possible coefficient range, when the possible coefficient of the presence of the acquisition one of which nucleic of terminal 300, judges the presence
The possible coefficient range of presence that possible coefficient is fallen into, to determine presence probability of the nucleic in radioactive sample, with more directly perceived
Ground allows user to understand.
In embodiments of the present invention, so that three detectors detect to same radioactive sample as an example, integration is disclosed
The processing method of the analyze data of three detectors, to show to carry out nuclide identification to radioactive sample using multiple detectors,
It is more accurate compared to using single detector progress nuclide identification, it is more efficient.
Fig. 2 is refer to, is a kind of schematic flow sheet of the nuclide identification method of multi-detector provided in an embodiment of the present invention,
The nuclide identification method of the multi-detector is applied to terminal 300, and this method includes：Step S110, receive each detector
The analytical parameters of transmission, the gamma-rays that the analytical parameters are received the radioactive sample transmitting by the detector generate power spectrum
And obtained according to the energy spectrum analysis.
Step S120, depositing for every kind of nucleic in the radioactive sample is calculated according to multiple analytical parameters according to pre-defined algorithm
In possible coefficient.
Fig. 3 is refer to, is the flow signal of the nuclide identification method of another multi-detector provided in an embodiment of the present invention
Figure, the nuclide identification method of the multi-detector are applied to terminal 300, and this method includes：Step S210, receive each detection
The analytical parameters that device is sent, the gamma-rays that the analytical parameters are received the radioactive sample transmitting by the detector generate energy
Compose and obtained according to the energy spectrum analysis.
Step S220, determine the net counting rate factor, nucleic confidence factor respectively according to pre-defined rule.
Step S230, the number of every kind of nucleic appearance is counted according to the nucleic classification in the analytical parameters, and according to pre-
Set pattern then determines the nucleic number of repetition factor.
Step S240, the net counting rate factor, nucleic confidence factor and the nucleic number of repetition factor are calculated
Presence to corresponding nucleic may coefficient.
Because the nuclide identifier system part in multi-detector has been described in, will not be repeated here.
In summary, the nuclide identifier system and method for a kind of multi-detector provided in an embodiment of the present invention, the system
Including terminal and multiple detectors, the terminal is all connected with multiple detectors, and each detector is used to enter radioactive sample
Row detection.The gamma-rays that each detector is used to receive the radioactive sample transmitting produces pulse signal, and according to institute
Pulse signal generation power spectrum is stated, each detector is analyzed to send out after obtaining respective analytical parameters to the power spectrum of each self-generating
Deliver to terminal.And then the terminal is calculated in the radioactive sample per seed nucleus according to pre-defined algorithm according to multiple analytical parameters
The presence of element may coefficient.This programme is analyzed by the analytical parameters of the radioactive sample gathered to multiple detectors, with
Nucleic present in the comprehensive descision radioactive sample, make it that testing result is more accurate.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.It should be noted that：Similar label and letter exists
Similar terms is represented in following accompanying drawing, therefore, once being defined in a certain Xiang Yi accompanying drawing, is then not required in subsequent accompanying drawing
It is further defined and explained.
Claims (10)
1. a kind of nuclide identifier system of multi-detector, it is characterised in that the system includes terminal and multiple detectors, described
Terminal is all connected with multiple detectors, and each detector is used to detect radioactive sample, and the system includes：
Each detector is used to receive pulse signal caused by the gamma-rays of the radioactive sample transmitting, and according to described
Pulse signal generates power spectrum；
Each detector is analyzed to obtain respective analytical parameters to the power spectrum of each self-generating；
Each detector sends corresponding analytical parameters to the terminal；
The presence that the terminal calculates every kind of nucleic in the radioactive sample according to pre-defined algorithm according to multiple analytical parameters can
Can coefficient.
2. the nuclide identifier system of multi-detector as claimed in claim 1, it is characterised in that the analytical parameters include net meter
Digit rate, nucleic classification and nucleic confidence level.
3. the nuclide identifier system of multi-detector as claimed in claim 2, it is characterised in that the terminal is predetermined according to first
Rule determines the net counting rate factor, nucleic confidence factor respectively,
The terminal is additionally operable to the number for counting every kind of nucleic according to the nucleic classification in the analytical parameters and occurring, and according to the
Two pre-defined rules determine the nucleic number of repetition factor.
4. the nuclide identifier system of multi-detector as claimed in claim 3, it is characterised in that the terminal by net counting rate because
The presence that corresponding nucleic is calculated in son, nucleic confidence factor and the nucleic number of repetition factor may coefficient.
5. the nuclide identifier system of multi-detector as claimed in claim 1, it is characterised in that the terminal is also by every kind of nucleic
Presence may coefficient with predetermined threshold compared with, if the nucleic presence possibility coefficient be less than predetermined threshold, remove
The nucleic.
6. the nuclide identifier system of multi-detector as claimed in claim 1, it is characterised in that be pre-stored with the terminal more
Individual probability to be present, each described have probability and have that possibility coefficient range is corresponding, and the terminal is according to every kind of nucleic with one
In the presence of may coefficient obtain corresponding to probability be present.
7. a kind of nuclide identification method of multi-detector, applied to terminal, it is characterised in that the terminal and multiple detectors are equal
Connection, each detector are used to detect radioactive sample, and methods described includes：
The analytical parameters that each detector is sent are received, the analytical parameters receive the radioactivity sample by the detector
Pulse signal generation power spectrum caused by the gamma-rays of product transmitting simultaneously obtains according to the energy spectrum analysis；
The presence for calculating every kind of nucleic in the radioactive sample according to multiple analytical parameters according to pre-defined algorithm may coefficient.
8. the nuclide identification method of multi-detector as claimed in claim 7, it is characterised in that the analytical parameters include net meter
Digit rate, nucleic classification and nucleic confidence level.
9. the nuclide identification method of multi-detector as claimed in claim 8, it is characterised in that methods described also includes：
The net counting rate factor, nucleic confidence factor are determined respectively according to the first pre-defined rule；
The number of every kind of nucleic appearance is counted according to the nucleic classification in the analytical parameters, and is determined according to the second pre-defined rule
The nucleic number of repetition factor.
10. the nuclide identification method of multi-detector as claimed in claim 9, it is characterised in that described according to pre-defined algorithm root
The presence of every kind of nucleic in the radioactive sample is calculated according to multiple analytical parameters to be included the step of coefficient：
Depositing for corresponding nucleic is calculated in the net counting rate factor, nucleic confidence factor and the nucleic number of repetition factor
In possible coefficient.
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| CN117250651A (en) * | 2023-11-07 | 2023-12-19 | 中国科学技术大学 | Planet element detection device based on pixel type tellurium-zinc-cadmium detector |
| CN117421570A (en) * | 2023-09-21 | 2024-01-19 | 清华大学 | Nuclide identification method, device, equipment and medium without energy scale |
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