CN107728192B - 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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- CN107728192B CN107728192B CN201710914625.2A CN201710914625A CN107728192B CN 107728192 B CN107728192 B CN 107728192B CN 201710914625 A CN201710914625 A CN 201710914625A CN 107728192 B CN107728192 B CN 107728192B
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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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Abstract
The present invention relates to radioactive source technical fields, and in particular to a kind of nuclide identifier system and method for multi-detector, the system comprises terminal and multiple detectors, the terminal is all connected with multiple detectors, and each detector is for detecting radioactive sample.Each detector is used to receive the gamma-rays of the radioactive sample transmitting and generates pulse signal, and generates power spectrum according to the pulse signal, and each detector analyzes the power spectrum of each self-generating to be sent to terminal after obtaining respective analysis parameter.In turn, the terminal may coefficient according to the presence that multiple analysis parameters calculate every kind of nucleic in the radioactive sample according to pre-defined algorithm.This programme is analyzed by the analysis parameter of the radioactive sample acquired to multiple detectors, with nucleic present in the comprehensive descision radioactive sample, so that testing result is more accurate.
Description
Technical field
The present invention relates to radioactive source technical fields, nuclide identifier system and side in particular to a kind of multi-detector
Method.
Background technique
Currently, Spectrum acquisition is carried out using gamma radiation detector, so that the method for carrying out radionuclide analysis is extensive
With.Such methods usually first carry out the acquisition of article gamma spectrum to be measured with gamma radiation detector, are believed according to collected power spectrum
Breath carries out the technologies such as characteristic peak analysis and obtains nuclide identification conclusion.
System for needing enzyme rapidly and sensitively to identify gamma activity nucleic often disposes multiple γ radiation detections simultaneously
Device improves the accuracy of the final nuclide identification result of system to detect the gamma-rays of different location.If system has been used multiple
Gamma radiation detector may generate multiple power spectrums for a sample detection, and the Radionuclide analysis based on different power spectrums may
There are different conclusions.
When sample only it is of short duration be in detection system or lower sample activity when, may only segment detector can be according to acquisition
The phenomenon that power spectrum correctly identifies nucleic, remaining detector leak detection or misrecognition occurs because of power spectrum accumulation deficiency；When sample packet
When containing a variety of nucleic, identification difficulty rises, and presumable detector can identify that whole nucleic, some detectors can only identification divisions
Nucleic, some detectors can not identify nucleic completely, because power spectrum becomes complicated under multicore element, even if having used special processing
Technology, nuclide identification precision may still be affected, and the nuclide identification accuracy of single detector is tested in this case.
The acquisition power spectrum for how reasonably using multiple detectors, obtains accurate gamma activity Radionuclide analysis conclusion, is
One problem.The Radionuclide analysis ability how promoted to single power spectrum is primarily upon 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.
Summary of the invention
The purpose of the present invention is to provide a kind of nuclide identifier system of multi-detector and methods, by using multiple detections
Device detects radioactive sample, to realize the classification for more accurately determining nucleic.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
In a first aspect, the system comprises ends the embodiment of the invention provides a kind of nuclide identifier system of multi-detector
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 comprises:
Each detector is used to receive the pulse signal of the radioactive sample transmitting, and according to the pulse signal
Generate power spectrum；
Each detector analyzes the power spectrum of each self-generating to obtain respective analysis parameter；
Corresponding analysis parameter is sent to the terminal by each detector；
The terminal calculates in the radioactive sample depositing for every kind of nucleic according to multiple analysis parameters according to pre-defined algorithm
In possible coefficient.
Second aspect, the embodiment of the invention also provides a kind of nuclide identification methods of multi-detector, are applied to terminal, institute
It states terminal to be all connected with multiple detectors, each detector is for detecting radioactive sample, which comprises
The analysis parameter that each detector is sent is received, the analysis parameter receives the radiation by the detector
Property electromagnetic radiation gamma-rays generate power spectrum and according to the energy spectrum analysis obtain；
May be according to the presence that multiple analysis parameters calculate every kind of nucleic in the radioactive sample according to pre-defined algorithm
Number.
The nuclide identifier system and method for a kind of multi-detector provided in an embodiment of the present invention, the system comprises terminal and
Multiple detectors, the terminal are all connected with multiple detectors, and each detector is for detecting radioactive sample.Each
The detector is used to receive the gamma-rays of the radioactive sample transmitting, and raw according to the pulse signal that the gamma-rays generates
At power spectrum, each detector analyzes the power spectrum of each self-generating to be sent to terminal after obtaining respective analysis parameter.Into
And the terminal may according to the presence that multiple analysis parameters calculate every kind of nucleic in the radioactive sample according to pre-defined algorithm
Coefficient.This programme is analyzed by the analysis parameter of the radioactive sample acquired to multiple detectors, and with comprehensive descision, this is put
Nucleic present in penetrating property sample, so that testing result is more accurate.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached 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 flow diagrams of the nuclide identification method of multi-detector provided in an embodiment of the present invention.
Fig. 3 shows the flow diagram of the nuclide identification method of another multi-detector provided in an embodiment of the present invention.
Diagram: 100- detector；200- network；300- terminal.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In the prior art, radioactive sample is detected usually using single detector, but some special
In the case of nucleic type in radioactive sample cannot be accurately detected using single detector.Such as: when radioactive sample
Since the time that detector can detecte is shorter, then it can may cause the feature energy peak of acquisition briefly in detection system
It is unobvious, so that nucleic classification cannot be accurately identified.When radioactive sample is low-activity radioactive sample, then may also lead to
The feature energy peak of detector acquisition is unobvious, therefore cannot accurately identify nucleic classification.When radioactive sample includes a variety of radiation
Property substance when, since the collected spectral information of single detector is complicated, identification difficulty is big, or even there is leakage identification, misrecognition
The case where, therefore, it cannot more clearly identify nucleic classification present in radioactive sample.Even if having in the prior art more
The case where a detector detects simultaneously, later data analyze handle when, and individually to the power spectrum of each detector into
Row analysis processing, cannot integrate and be analyzed using the detection result of each detector, in essence, or using single
Detector radioactive sample is detected, accuracy is lower.
The embodiment of the present invention provides a kind of nuclide identifier system of multi-detector as a result, by acquiring to multiple detectors
Power spectrum carry out comprehensive analysis, to accurately identify the nucleic classification in radioactive sample.
Fig. 1 is please referred to, is a kind of structural schematic diagram 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, which 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 for detecting gamma ray radiator, in other words
It says, which is gamma ray radiator.
When being detected to radioactive sample, multiple detectors 100 are distributed in around the radioactive sample, this is more
The specific placement location of a detector 100 can be arranged symmetrically according to the radioactive sample, it is readily appreciated that, multiple detector
100 position, which can according to need, to be configured.More preferably, the parameter of the multiple detectors 100 detected is consistent, such as multiple
100 type of detector is consistent, similar performance, high voltage parameter are close etc..Readily comprehensible, multiple detectors 100 are to radioactivity sample
The start and end time of the detection of product should also be set as the identical period.
Each detector 100 is the gamma-rays for receiving radioactive sample transmitting for detecting radioactive sample.The detection
The core component Digital Spectrometer of device 100 will generate power spectrum by gamma-rays based on the received, and to using background rejection technology, feature
Peak fitting technique obtains analysis parameter to energy spectrum analysis, which is net counting rate, nucleic classification, nucleic confidence level.Its
In, it analyzes to obtain net counting rate by background rejection technology, since, there are γ radioactive ray, therefore, it is necessary to pass through background in environment
Deduction technology deducts the influence of environmental factor in collected pulse signal, obtains of the pulse signal from radioactive sample
Number, as net counting rate.In addition, analyzing 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
It Wei not the first detector, the second detector and third detector.
The net counting rate that first detector is analyzed 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%, the confidence level of nucleic b is 80%.
The net counting rate that second detector is analyzed is 1000, wherein the nucleic classification detected is two kinds, respectively
Nucleic b and nucleic c, wherein the confidence level that analysis obtains nucleic b is 80%, the confidence level of nucleic c is 10%.
The net counting rate that third detector is analyzed is 500, wherein the nucleic classification detected is one kind, it is nucleic c,
Its confidence level is 60%.
The analysis parameter that multiple detector 100 will obtain energy spectrum analysis, including net counting rate, nucleic classification, nucleic
Confidence level is sent to terminal 300 together.
The terminal 300 analyzes received analysis parameter further progress, specifically includes: 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 set
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
It formulates by other means.Wherein, in embodiments of the present invention, mode is formulated are as follows: due to only having the first detector to detect
Nucleic a, and the corresponding net counting rate of nucleic a is 500, corresponding confidence level is 20%, then the net counting rate factor of nucleic a is 5,
Nucleic confidence factor is 0.2.In addition, the first detector also detects nucleic b, and the corresponding net counting rate of nucleic b is 500,
Corresponding confidence level is 80%, meanwhile, the second detector also detects nucleic b, and in the second detector, nucleic b is corresponding net
Counting rate is 1000, and corresponding confidence level is 80%, then integrate the first detector and the second detector as a result, nucleic b is corresponding
Net counting rate and be 1500, corresponding confidence level and be 160%, then the corresponding net counting rate factor of nucleic b be 15, nucleic is set
Belief factor is 1.6.It can similarly obtain, the net count factor of nucleic c is 15, and nucleic confidence factor is 0.7.
In addition, the terminal 300 analyzes the number that every kind of nucleic of parametric statistics is detected based on the received, and according to predetermined
Algorithm determines the nucleic number of repetition factor.Since the nucleic classification that the first detector detects is nucleic a and nucleic b, second is visited
Surveying the nucleic classification that device detects is nucleic b and nucleic c, and the nucleic classification that third detector detects is nucleic c.Therefore nucleic
A is detected once, then the corresponding nucleic number of repetition factor of 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 corresponding nucleic number of repetition factor of nucleic c be 2.
Further, the terminal 300 is by the determining net count factor, nucleic confidence factor and the nucleic number of repetition factor
Be multiplied to calculate separately every kind of nucleic presence may coefficient, to judge possibility that every kind of nucleic occurs in radioactive sample
Property.It is learnt by calculating, the net counting rate factor of nucleic a is 5, nucleic confidence factor is 0.2, the nucleic number of repetition factor is
1, then the possible coefficient of the presence of nucleic a is 1.The net counting rate factor of nucleic b is 15, nucleic confidence factor is 1.6, nucleic
The number of repetition factor is 2, then the possible coefficient of the presence of nucleic b is 48.The net counting rate factor of nucleic c is 15, nucleic confidence
The degree factor is 0.7, the nucleic number of repetition factor is 2, then the possible coefficient of the presence of nucleic c is 21.It is also pre-stored in the terminal 300
Predetermined threshold, if it exists may coefficient be less than the predetermined threshold, then by this exist may the corresponding nucleic of coefficient delete, be left
Nucleic be then nucleic that may be present in radioactive sample.If predetermined threshold is 5, since the presence of nucleic a may coefficient
It is 1, less than 5, shows that a possibility that there are nucleic a in radioactive sample is lower, then delete nucleic a, to obtain final sumbission,
A possibility that there are nucleic b and nucleic c i.e. in radioactive sample is larger.
It more intuitively shows for convenience as a result, being also stored with multiple existing probabilities, each existing probability in the terminal 300
Corresponding one has possible coefficient range, when the possible coefficient of the presence that terminal 300 obtains one of nucleic, judges the presence
The possible coefficient range of the presence that possible coefficient is fallen into, to determine existing probability of the nucleic in radioactive sample, with more intuitive
Ground allows user to understand.
In embodiments of the present invention, by taking three detectors detect same radioactive sample as an example, integration is disclosed
The processing method of the analysis data of three detectors, to show to carry out nuclide identification to radioactive sample using multiple detectors,
Compared to use single detector carry out nuclide identification it is more accurate, it is more efficient.
Referring to figure 2., be a kind of multi-detector provided in an embodiment of the present invention nuclide identification method flow diagram,
The nuclide identification method of the multi-detector is applied to terminal 300, this method comprises: step S110, receives each detector
The analysis parameter of transmission, the analysis parameter generate power spectrum by the gamma-rays that the detector receives the radioactive sample transmitting
And it is obtained according to the energy spectrum analysis.
Step S120 calculates in the radioactive sample depositing for every kind of nucleic according to multiple analysis parameters according to pre-defined algorithm
In possible coefficient.
Referring to figure 3., be another multi-detector provided in an embodiment of the present invention nuclide identification method process signal
The nuclide identification method of figure, the multi-detector is applied to terminal 300, this method comprises: step S210, receives each detection
The analysis parameter that device is sent, the analysis parameter generate energy by the gamma-rays that the detector receives the radioactive sample transmitting
It composes and is obtained according to the energy spectrum analysis.
Step S220 determines the net counting rate factor, nucleic confidence factor according to pre-defined rule respectively.
Step S230 counts the number of every kind of nucleic appearance according to the nucleic classification in the analysis parameter, and according to pre-
Set pattern then determines the nucleic number of repetition factor.
Step S240 calculates the net counting rate factor, nucleic confidence factor and the nucleic number of repetition factor
Presence to corresponding nucleic may coefficient.
Since the nuclide identifier system part in multi-detector has been described in, details are not described herein.
In conclusion 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, each detector be used for radioactive sample into
Row detection.The gamma-rays that each detector is used to receive the radioactive sample transmitting generates pulse signal, and according to institute
It states pulse signal and generates power spectrum, each detector is analyzed to send out after obtaining respective analysis parameter to the power spectrum of each self-generating
It send to terminal.In turn, the terminal calculates every seed nucleus in the radioactive sample according to multiple analysis parameters according to pre-defined algorithm
The presence of element may coefficient.This programme is analyzed by the analysis parameter of the radioactive sample acquired to multiple detectors, with
Nucleic present in the comprehensive descision radioactive sample, so that testing result is more accurate.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
Claims (4)
1. a kind of nuclide identifier system of multi-detector, which is characterized in that described the system comprises terminal and multiple detectors
Terminal is all connected with multiple detectors, and each detector is used to detect radioactive sample, the system comprises:
Each detector is used to receive the pulse signal that the gamma-rays of the radioactive sample transmitting generates, and according to described
Pulse signal generates power spectrum；
Each detector analyzes the power spectrum of each self-generating to obtain respective analysis parameter, the analysis parameter packet
Include net counting rate, nucleic classification and nucleic confidence level；
Corresponding analysis parameter is sent to the terminal by each detector；
The terminal can according to the presence that multiple analysis parameters calculate every kind of nucleic in the radioactive sample according to pre-defined algorithm
Energy coefficient, specifically includes: determining the net count factor, nucleic confidence factor of every kind of nucleic respectively, further, every kind described
The net count factor of nucleic is determining according to the sum of each described net counting rate, the nucleic confidence factor foundation of every kind of nucleic
The sum of each described nucleic confidence level determines；The number of every kind of nucleic appearance is counted according to the nucleic classification, and determines nucleic
The number of repetition factor；By the net counting rate factor, nucleic confidence factor and nucleic number of repetition fac-tor to be calculated
The presence of corresponding nucleic may coefficient.
2. the nuclide identifier system of multi-detector as described in claim 1, which is characterized in that the terminal is also by every kind of nucleic
Presence may coefficient be compared with predetermined threshold, if the presence of the nucleic may coefficient less than predetermined threshold, remove
The nucleic.
3. the nuclide identifier system of multi-detector as described in claim 1, which is characterized in that be pre-stored in the terminal more
A existing probability, each existing probability with one exist may coefficient range it is corresponding, the terminal is according to every kind of nucleic
Corresponding existing probability is obtained in the presence of possible coefficient.
4. a kind of nuclide identification method of multi-detector is applied to terminal, which is characterized in that the terminal and multiple detectors are equal
Connection, each detector is for detecting radioactive sample, which comprises
The analysis parameter that each detector is sent is received, the analysis parameter includes net counting rate, nucleic classification and core
Plain confidence level, the pulse signal that the analysis parameter is generated by the gamma-rays that the detector receives the radioactive sample transmitting
It generates power spectrum and is obtained according to the energy spectrum analysis；
According to the possible coefficient of presence that pre-defined algorithm calculates every kind of nucleic in the radioactive sample according to multiple analysis parameters, tool
Body includes: the net count factor, nucleic confidence factor of determining every kind of nucleic respectively, further, every kind of nucleic it is net
Count factor determines that the nucleic confidence factor of every kind of nucleic is according to each described according to the sum of each described net counting rate
The sum of nucleic confidence level determines；The number of every kind of nucleic appearance is counted according to the nucleic classification, and determines nucleic number of repetition
The factor；By the net counting rate factor, nucleic confidence factor and nucleic number of repetition fac-tor corresponding nucleic is calculated
Presence may coefficient.
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| CN108535768B (en) * | 2018-03-13 | 2021-08-20 | 江苏超敏科技有限公司 | Gamma camera based on double-detector technology |
| CN108646284B (en) * | 2018-05-15 | 2020-11-13 | 张金钊 | Gamma-spectrum combined detection system and gamma-spectrum measurement method |
| CN113466923B (en) * | 2020-03-31 | 2024-04-12 | 同方威视技术股份有限公司 | Method and apparatus for detecting radioactive substance |
| 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 |
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