CN109738936A - Substance detecting method, apparatus and system - Google Patents
Substance detecting method, apparatus and system Download PDFInfo
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- CN109738936A CN109738936A CN201910110218.5A CN201910110218A CN109738936A CN 109738936 A CN109738936 A CN 109738936A CN 201910110218 A CN201910110218 A CN 201910110218A CN 109738936 A CN109738936 A CN 109738936A
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- 239000000126 substance Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 143
- 239000000941 radioactive substance Substances 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims description 58
- 238000012806 monitoring device Methods 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000003595 spectral effect Effects 0.000 abstract description 5
- 230000015654 memory Effects 0.000 description 18
- 230000002285 radioactive effect Effects 0.000 description 14
- 238000001228 spectrum Methods 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 8
- 230000005251 gamma ray Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 235000013399 edible fruits Nutrition 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000004422 calculation algorithm Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
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- 239000012857 radioactive material Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The embodiment of the invention discloses a kind of substance detecting methods, apparatus and system.Wherein, substance detecting method includes: the modal data for acquiring the nucleic of detected object, wherein the modal data includes spectral shape；Object detection area corresponding with the detected object at least two object detection areas is determined according to the modal data；The detected object is detected according to the nucleic detection threshold value of the object detection area.The technical solution of the embodiment of the present invention, the corresponding object detection area of detected object can be quickly determined by the modal data of the nucleic of detected object, and then the nucleic detection threshold value based on the object detection area detects the detected object, can accurately identify to radioactive substance.
Description
Technical field
The present embodiments relate to substance detection technique field more particularly to a kind of substance detecting methods, apparatus and system.
Background technique
In daily life, when entering and leaving the important places such as subway station, airport, railway station and customs, it is often necessary to will
Article is placed on the detection that radioactive substance is carried out on object machine, to guarantee the safety of people.In general, object machine is having checking matter
When product pass through, X-ray generator can be opened, according to the X-ray doses change through object to be detected detected, be come
The information of object to be detected is obtained, is detected whether article is dangerous goods to confirm, when object machine does not have article to pass through, then
X-ray generator is closed.But the moment opened and closed in X-ray generator, the exit dose of X-ray can occur
Mutation, there are obvious step, the variation of randomness can occur for the collected spectral shape of multichannel analyzer.Therefore, detection device
It needs to carry out radioactive substance effectively identification alarm to false alarm when X-ray generator opens and closes, is also easy to produce.And
And X-ray belongs to radiation class ray, can have an impact to the detection of gamma gamma ray radiator, device software, hardware are required to consider
X-ray influence is effectively filtered out, to guarantee carrying out identification process to detected article, is not influenced by X-ray.
The energy spectrum diagram difference using X-ray and radioactive source is proposed in the prior art, is distinguished using spectral shape and is detected otherwise
The technology of radioactive source.Theoretically, the energy spectrum diagram under real-time energy spectrum diagram and X-ray machine normal operating conditions when radioactive source is close
Really variant, two parts of energy spectrum diagram coupling units can be filtered out, so that the effects of radiation of X ray be eliminated, reach radioactive source
The purpose of detection.
Be feasible in this technical know-how, but have been found that in practical operation: when X-ray machine quiescent operation, energy spectrum diagram is simultaneously
It is unstable, power spectrum diagram shape be it is continually changing, be not present evident regularity；When taking comparison null method, power spectrum coupling filters out effect
Fruit is undesirable, and there are many rate of false alarm, cannot effectively be detected to radioactive source.
Summary of the invention
The embodiment of the invention provides a kind of substance detecting methods, apparatus and system, accurate to radioactive substance to realize
Detection.
In a first aspect, the embodiment of the invention provides a kind of substance detecting methods, this method comprises:
Acquire the modal data of the nucleic of detected object；
Target inspection corresponding with the detected object at least two object detection areas is determined according to the modal data
Survey region；
The detected object is detected according to the nucleic detection threshold value of the object detection area.
Optionally, the substance detecting method further include:
X-ray detection range is detected into zoning by low energy detecting area to high energy detecting area or by high energy detecting area to low energy
It is divided at least two object detection areas, and determines the nucleic detection threshold value of each object detection area respectively.
Optionally, the substance detecting method further include:
The radiation feature that X-ray is determined according to the physical characteristic of at least two radioactive substances, according to X-ray radiation feature
Determine X-ray detection range.
Optionally, the substance detecting method further include:
Determine the X-ray sensitive region at least two object detection area, and to the X-ray sensitive region into
The processing of row data weighting.
Optionally, the substance detecting method further include:
To X-ray generator, in starting and closing, generated amount of radiation step signal is carried out at the filtering of background sliding window
Reason.
Second aspect, the embodiment of the invention also provides a kind of substance detecting apparatus, which includes:
Modal data acquisition module, the modal data of the nucleic for acquiring detected object；
Detection zone determining module, for according to the modal data determine at least two object detection areas with the quilt
The corresponding object detection area of test object；
Detection module, for being examined according to the nucleic detection threshold value of the object detection area to the detected object
It surveys.
The third aspect, the embodiment of the invention also provides a kind of substance detection system, which includes: detected object
Bogey, X-ray generator and radiation monitoring device；Wherein, the radiation monitoring device includes substance detecting apparatus,
The substance detecting apparatus is used to execute any substance detecting method in the embodiment of the present invention.
Optionally, the radiation monitoring device includes at least one shielding area, wherein the shielding area is by covering card
Calculation method determines.
Optionally, the shielding area is provided with screen, and the screen is for shielding X-ray, wherein the shielding
Object includes stereotype.
Optionally, stereotype is provided between the bogey of the detected object and the radiation monitoring device, it is described
Stereotype offers through-hole, and the diameter of the through-hole is more than or equal to the diameter of the probe of the radiation monitoring device.
Fourth aspect the embodiment of the invention also provides a kind of terminal, including memory, processor and is stored in memory
Computer program that is upper and can running on a processor, the processor are realized when executing described program as in the embodiment of the present invention
Any substance detecting method.
5th aspect, the embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer
Program realizes the substance detecting method as described in any in the embodiment of the present invention when computer program is executed by processor.
The technical solution of the embodiment of the present invention can be determined quickly by the modal data of the nucleic of detected object and is detected
The corresponding object detection area of object, so the nucleic detection threshold value based on the object detection area to the detected object into
Row detection, solves the high technical problem of existing radioactive source detection method rate of false alarm, can accurately carry out to radioactive substance
Identification.
Detailed description of the invention
In order to more clearly illustrate the technical scheme of the exemplary embodiment of the present invention, below to required in description embodiment
The attached drawing to be used does a simple introduction.Obviously, the attached drawing introduced is present invention a part of the embodiment to be described
Attached drawing, rather than whole attached drawings without creative efforts, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of flow chart of substance detecting method provided by the embodiment of the present invention one；
Fig. 2 is a kind of structure chart of substance detecting apparatus provided by the embodiment of the present invention two；
Fig. 3 is a kind of structure chart for substance detection system that the embodiment of the present invention three provides；
Fig. 3 a is the test knot of dimorphism wrong report experiment when a kind of X generating device that the embodiment of the present invention three provides is opened
Fruit figure；
Fig. 3 b is the test knot of dimorphism wrong report experiment when a kind of X generating device that the embodiment of the present invention three provides is closed
Fruit figure；
Fig. 3 c is the experiment tested under a kind of X generating device that the embodiment of the present invention three provides is opened the source Co60
Test result figure；
Fig. 4 is a kind of hardware structure diagram for terminal that the embodiment of the present invention four provides.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing to of the invention specific real
Example is applied to be described in further detail.It is understood that specific embodiment described herein is used only for explaining the present invention,
Rather than limitation of the invention.
It also should be noted that only the parts related to the present invention are shown for ease of description, in attached drawing rather than
Full content.It should be mentioned that some exemplary embodiments are described before exemplary embodiment is discussed in greater detail
At the processing or method described as flow chart.Although operations (or step) are described as the processing of sequence by flow chart,
It is that many of these operations can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of operations can be by again
It arranges.The processing can be terminated when its operations are completed, it is also possible to have the additional step being not included in attached drawing.
The processing can correspond to method, function, regulation, subroutine, subprogram etc..
Before introducing various embodiments of the present invention, first the application scenarios of the embodiment of the present invention are illustrated, due to X-ray
With very high penetration capacity, many substances opaque to visible light, such as black paper, timber can be penetrated, so that many solids
Visible fluorescence occurs for material, for the radiation monitoring device to work under safety check environment, it will usually by X-ray to detected pair
As being detected.(saying is incorrect, deletes)
Due to opening or closing moment in X-ray, equipment detects gross-count rate and sudden transformation, general radiation prison is presented
It surveys class equipment and relies only on counting rate is simple to judge whether radiation level is abnormal, be mutated in this counting rate but not necessarily have radiation
Under conditions of object passes through, traditional algorithm system is simultaneously not suitable for, and is often reported by mistake, if increasing counting rate alarm threshold value merely, is cut
Weak a part of device sensitivity, though can be effectively reduced to X-ray open or close moment wrong report generation, caused by consequence it is past
The sensitivity of detection of other nucleic classes is greatly reduced toward being, therefore generally requires that X is penetrated in other words to the coverage of X-ray
Beta radiation scope control it is extremely accurate.In addition, it is desirable to increase the sensitivity of X-ray regionally detecting.
Embodiment one
Fig. 1 is a kind of flow chart of substance detecting method provided by the embodiment of the present invention one, and the present embodiment is applicable to
Accurate detection to radioactive substance, this method can be executed by substance detecting apparatus, the device can by software and/or
Hardware is realized.
As shown in Figure 1, the method for the present embodiment is specific can include:
S110, acquire detected object nucleic modal data.
In embodiments of the present invention, detected object can be with radioactive substance, be also possible to do not have radiation
The substance of property.
Wherein, the detection of radioactive substance can be realized by the identification to radionuclide, to radionuclide
Identification specifically can be by obtain radionuclide gamma spectra, the gamma spectra is analyzed, so that it is determined that
The information such as type and content of radioactive substance component out.Therefore, the modal data of the nucleic of detected object can be acquired,
The radioactive substance of detected object is detected by the modal data of detected object.Wherein, the modal data may include
At least one of in the data such as spectral shape, characteristics of energy spectrum peak, frequency and amplitude.
S120, mesh corresponding with the detected object at least two object detection areas is determined according to the modal data
Mark detection zone.
Currently, when X-ray detection range detects detected object as a detection zone, into usually requiring
Judge that the type of nucleic, identification process are more slow one by one from most low energy detecting area.In embodiments of the present invention, X can be penetrated
Line investigative range divides at least two object detection areas, carries out subregion identification to detected object.Specifically, X can be penetrated
Line investigative range is divided at least two object detection areas to high energy detecting area by low energy detecting area, alternatively, by X-ray detection
Range is divided at least two object detection areas to low energy detecting area by high energy detecting area, in turn, goes out to determine each mesh respectively
Mark the nucleic detection threshold value of detection zone.
It is studied for X-ray feature, for X-ray compared with cobalt, caesium source, radiation energy area range concentrates on low energy region.
Illustratively, X-ray detection range can be divided by low energy detecting area to high energy detecting area by six targets according to modal data
Detection zone, to the threshold value different from of the identification nucleic of each object detection area, after collecting the modal data of nucleic,
The object detection area that detected object can be gone out according to the quick fixation and recognition of spectral shape, i.e., quickly orient the detected object
Identification section, relative to traditional recognizer, the arithmetic speed of the algorithm is fast, without judging one by one from most low energy radiation area
The type of nucleic.
As a kind of optinal plan of the embodiment of the present invention, can be determined according to the physical characteristic of at least two radioactive substances
The radiation feature of X-ray determines X-ray detection range according to X-ray radiation feature.In embodiments of the present invention, in conjunction with difference
The physical characteristic of type radioactive substance, such as wavelength, power spectrum and penetration power, data accumulation, X is penetrated through a large number of experiments
Beta radiation feature is clearly separated with other radiation substance radiation features, is controlled X-ray coverage extremely accurate.
On this basis, the technical solution of the embodiment of the present invention can further include: determine at least two mesh
The X-ray sensitive region in detection zone is marked, and data weighting processing is carried out to the X-ray sensitive region, to increase its spy
Survey inertia.Illustratively, the X-ray determined at least two object detection area can be tested by the joint debugging with equipment
Sensitizing range.It can be also filtered further directed to the X-ray sensitive region.
Optionally, by the energy range of X-ray with241Am carries out intelligent decision, meets241The intelligent decision of Am, Ke Yishi
Do not go out241The radioactive source of Am.It is allowed to the influence that can be effectively filtered out X-ray to equipment and the inspection to other radioactive substances
Survey impacts.
S130, the detected object is detected according to the nucleic detection threshold value of the object detection area.
It is examined behind the object detection area for determining the detected object, and then according to the nucleic of the object detection area
It surveys threshold value to detect the detected object, more accurate can rapidly provide testing result.
It is understood that being detected to detected object and often whether being had to detect in safety check environment
Active substance is guaranteed with the influence for avoiding people and object in radioactive material confrontation local environment that takes appropriate measures
Environmental security.It wherein, include detection to gamma ray radiator to the detection of the detected object.By taking gamma ray radiator as an example, work as γ
When the radiation of radioactive source generates, can enable automatically the nucleic detection threshold value of the object detection area to the detected object into
Row detection, according to the shape of the nucleic of the detected object composed in real time, radiation level, identifying automatically is gamma ray radiator,
And provide the data of radiation level.That is, pre-set subregion intelligent recognition algorithm through the embodiment of the present invention, it can foundation
The section for measuring spectrum, quickly recognizes the peculiar nucleic in the region, quickly provides the conclusion of identification.
In addition, the substance detecting method can also include: to X on the basis of the technical solution of the embodiment of the present invention
Ray generating device generated amount of radiation step signal in starting and closing carries out the filtering processing of background sliding window.The technical side
Case carries out the filtering processing of background sliding window by the amount of radiation step generated to X-ray generator start and stop, increases to X-ray
The inertia of detection makes no matter to open and be not turned on X-ray generator when equipment works and will not all generate false alarm, and not shadow
Ring the region except X-ray detection range.
It should be noted that after device power-on work, the modal data of automatic Acquisition Environment background, and in the normal work of equipment
Dynamic update is carried out in work, always to distinguish X-ray or the source γ in time.When the radiation of X-ray generates, pass through subregion intelligence
Energy recognizer, the influence of the automatic rejection X-ray, environmental exact details modal data timely update.
Wherein, the modal data of environmental exact details is that equipment is judged automatically according to previous test data, what automatic identification came out.If
It when the standby starting of power-up for the first time, needs to execute in the passive environment clean around, modal data caused by equipment can be automatic at this time
It is registered as default contexts background modal data, subsequent in equipment normal operation, which can automatically update.
The technical solution of the present embodiment can quickly determine detected object by the modal data of the nucleic of detected object
Corresponding object detection area, and then the nucleic detection threshold value based on the object detection area examines the detected object
It surveys, solves the high technical problem of existing radioactive source detection method rate of false alarm, accurately radioactive substance can be identified.
Embodiment two
Fig. 2 is a kind of structural schematic diagram of substance detecting apparatus provided by the embodiment of the present invention two, should as shown in Fig. 2
Substance detecting apparatus includes: modal data acquisition module 210, detection zone determining module 220 and detection module 230.
Wherein, modal data acquisition module 210, the modal data of the nucleic for acquiring detected object；Detection zone determines
Module 220, for determining mesh corresponding with the detected object at least two object detection areas according to the modal data
Mark detection zone；Detection module 230, for the nucleic detection threshold value according to the object detection area to the detected object
It is detected.
The technical solution of the present embodiment can quickly determine detected object by the modal data of the nucleic of detected object
Corresponding object detection area, and then the nucleic detection threshold value based on the object detection area examines the detected object
It surveys, solves the high technical problem of existing radioactive source detection method rate of false alarm, accurately radioactive substance can be identified.
On the basis of above-mentioned each technical solution, the substance detecting apparatus can also include:
Detection zone determining module is used for X-ray detection range by low energy detecting area to high energy detecting area or by height
Energy detecting area is divided at least two object detection areas to low energy detecting area, and determines the core of each object detection area respectively
Plain detection threshold value.
On the basis of above-mentioned each technical solution, the substance detecting apparatus can also include:
Investigative range determining module, for determining the radiation of X-ray according to the physical characteristic of at least two radioactive substances
Feature determines X-ray detection range according to X-ray radiation feature.
On the basis of above-mentioned each technical solution, the substance detecting apparatus can also include:
Sub-region right module, for determining the X-ray sensitive region at least two object detection area, and to institute
It states X-ray sensitive region and carries out data weighting processing.
On the basis of above-mentioned each technical solution, the substance detecting apparatus can also include:
Signal processing module, for X-ray generator in starting and closing generated amount of radiation step signal
Carry out the filtering processing of background sliding window.
Substance detecting method provided by any embodiment of the invention can be performed in above-mentioned substance detection device, has execution object
The corresponding functional module of quality detection method and beneficial effect.
Embodiment three
Fig. 3 is a kind of structural schematic diagram of substance detection system provided by the embodiment of the present invention three, the substance detection system
System includes: the bogey, X-ray generator and radiation monitoring device of detected object；Wherein, the Radiation monitoring is set
Standby includes substance detecting apparatus, and the substance detecting apparatus is used to execute any substance detection in the embodiment of the present invention
Method.Wherein, it can be found in the embodiment of the method in the present invention about the relevant explanation of substance detecting method, details are not described herein.
As shown in figure 3, the bogey of detected object can be transmission device, the transmission device include conveyer belt with
And the conveyor drive arrangement；The X-ray generator can be X-ray machine.
Substance detection system generates a large amount of X-rays at work, by X-ray generator, and radiation monitoring device is embedded
It in substance detection system, is often exposed in strong x-ray bombardment environment, if shielding measure equipment is not added by radiation agent
Amount can be very big, interferes to the detection of radiation monitoring device, be easy to cause and flood to small signal and weak signal, reduces
The sensitivity of equipment detection.Therefore, the radiation monitoring device may include at least one shielding area, wherein the blind zone
Domain is determined by covering card calculation method.
It is influenced on X-ray is eliminated, adopts the available calorimeter that covers and calculate, extrapolate the effective shielding area of substance detection system and face
Product.It is of course also possible to calculate the effective shielding area of radiation monitoring device.
Wherein, it covers calorimeter to calculate, i.e. Monte Carlo calculations method, the probability of some event can be directed to, pass through random experiment
Method obtains the frequency of event generation, replaces probability with frequency, reaches a solution of a problem.It can be with using Monte Carlo principle
Detection efficient, receptance function, full energy peak and other related amounts of calculating detector.
For the detection efficient of lower energy photon, can be obtained by experimental method；But the detection efficient of high-energy photon is logical
It crosses experimental method to be difficult to obtain, radionuclide as reality is limited, and especially high energy light component is more difficult to obtain.Cause
This, can be by card calculation method be covered, by the different shielding of theoretical calculation for the detection efficient of X ray and gamma ray radiator
It influences.
Illustratively, MCNP can be used, and (Monte Carlo Neutron and Photon Transport Code is covered
Special Caro neutron and optical transport code) program bag calculates experimental result by exponential transform method.It extrapolates effective
Shielding surface rationally designs the size of the shielding of the shielding area of radiation monitoring device, thickness.
On this basis, the shielding area may be provided with screen, and the screen is for shielding X-ray.Wherein, shield
Covering can not be made of heavy metal.Further, the heavy metal can be lead.Illustratively, the screen may include stereotype
And/or lead curtain etc..
It is understood that at least one shielding area includes one, two or more shielding areas.Difference screen
The screen for covering region can be the same or different.
By taking radiation monitoring device as an example, can top to bottom, left and right, front and rear to radiation monitoring device and detection radiation function without
The end face of pass carries out covering lead processing.
Item monitoring system is to meet radiation protection requirement, can also be on the outside of complete machine, and the whole body covers stereotype.
To avoid interference of the X-ray generator to radiation monitoring device, at the same guarantee radiation detecting apparatus detect by
The radiation level for the detected object that test object bogey is carried, optionally, the bogey of the detected object
It may be provided with stereotype between the radiation monitoring device, the stereotype offers through-hole, and the diameter of the through-hole is more than or equal to
The diameter of the probe of the radiation monitoring device.
It is understood that lesser bore size can accomplish good to the leakage of X-ray in substance detection system
Control.The diameter that the diameter of the through-hole of the embodiment of the present invention can pop one's head in is configured, for example, the bore size of the through-hole is to visit
The circular hole of head diameter.Optionally, the diameter of the through-hole is equal to the diameter of the probe.In view of actual hole opening technology
Precision be likely to result in through-hole aperture size it is inaccurate, the diameter of the through-hole and the difference of the diameter of the probe are in
In preset error range.Wherein, error range is the smaller the better, and the specific value of error range is it is not limited here.Such as it can
It is ± 1mm, ± 1.5mm or ± 2mm etc..Targeted design is not carried out by the structure design of existing equipment, will commonly be set merely
Standby to bring use, it is excessive to often result in substance detection system itself aperture, and substance detection system X-ray is brought to reveal exceeded wind
Danger.
It should be noted that the size of the through-hole can be configured according to the actual situation, including but can not be only limitted to
Above-mentioned technical proposal herein and is not specifically limited.The technical solution of the embodiment of the present invention can take reasonable shielding by complete machine,
The influence of radioactive ray is reduced to minimum by the strategy of the small aperture of detection probe.
In order to guarantee the detection accuracy of radiation monitoring device, optionally, the through-hole can be corresponding with X-ray sensitive region
Setting, accomplishes controllable to the directional reception and dosage of X-ray.Not only X-ray interference dynamics had been reduced, but also equipment itself will not be reduced
Sensitivity.
Detected object is checked for the ease of user, the substance detection system can also include image collector
It sets, for acquiring the image information of the detected object.Further, the substance detection system can also include display dress
It sets, for showing described image information.
In addition, the substance detection system can also include: warning device, detect that the detected article is for working as
It alarms when radioactive substance.Wherein, the warning device can be realized by way of software and/or hardware.
It has been carried out respectively based on substance detection system provided by the embodiment of the present invention when X generating device opens and closes
Radioactive source test experience under dimorphism wrong report experiment and X-ray open state.
Fig. 3 a is the test knot of dimorphism wrong report experiment when a kind of X generating device that the embodiment of the present invention three provides is opened
Fruit figure；Fig. 3 b is the test result of dimorphism wrong report experiment when a kind of X generating device that the embodiment of the present invention three provides is closed
Figure.As shown in Figure 3a and Figure 3b shows, substance detection system is under two kinds of normal operating conditions that X generating device opens or closes,
Do not generate alarm behavior.
Fig. 3 c is the experiment tested under a kind of X generating device that the embodiment of the present invention three provides is opened the source Co60
Test result figure.Equipment is tested when opening X-ray using the source Co60, and equipment can accurately identify alarm, spectrogram of alarming
Also radiant-energy spectrum distribution can completely be presented, top is X-ray, and two times peak is Co60 characteristic spectrum, and equipment can be penetrated in strong X
Identification alarm is carried out to radioactive source in thread environment.
The substance detection system of the embodiment of the present invention can be realized environmental exact details automatically updating data, not sent out by X ray
The influence of generating apparatus booting and shutdown.Stable equipment operation, rate of false alarm are not more than 0.1%.Have been carried out radioactive source60Co、137Cs、241The probability of success of monitoring, identification and alarm of Am etc., monitoring is up to 99.99% or more.
Example IV
As shown in figure 4, a kind of hardware structural diagram of the terminal provided for the embodiment of the present invention four, as shown in figure 4, should
Terminal includes: one or more processors 410, in Fig. 4 by taking a processor 410 as an example；Memory 420；The terminal may be used also
To include: input unit 430 and output device 440.Processor 410, memory 420,430 and of input unit in the equipment
Output device 440 can be connected by bus or other modes, in Fig. 4 for being connected by bus 450.
Memory 420 be used as a kind of non-transient computer readable storage medium, can be used for storing software program, computer can
Execute program and module, as the corresponding program instruction/module of one of embodiment of the present invention substance detecting method (for example,
Attached modal data acquisition module 210 shown in Fig. 2, detection zone determining module 220 and detection module 230).Processor 410 passes through
Software program, instruction and the module being stored in memory 420 are run, thereby executing the various function application and number of equipment
According to processing, that is, realize a kind of substance detecting method of above method embodiment.
Memory 420 may include storing program area and storage data area, wherein storing program area can store operation system
Application program required for system, at least one function；Storage data area, which can be stored, uses created data etc. according to equipment.
It can also include non-transitory memory in addition, memory 420 may include high-speed random access memory, for example, at least one
A disk memory, flush memory device or other non-transitory solid-state memories.In some embodiments, memory 420 can
Choosing includes the memory remotely located relative to processor 410, these remote memories can be set by network connection to terminal
It is standby.The example of above-mentioned network includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Input unit 430 can be used for receiving the number or character information of input, and generate with the user setting of terminal with
And the related key signals input of function control.Output device 440 may include that display screen etc. shows equipment.
Embodiment five
The embodiment of the present invention five also provides a kind of storage medium comprising computer executable instructions, and the computer can be held
Row instruction is used to execute a kind of substance detecting method when being executed by computer processor, this method comprises: detected pair of acquisition
The modal data of the nucleic of elephant；It is determined according to the modal data corresponding with the detected object at least two object detection areas
Object detection area；The detected object is detected according to the nucleic detection threshold value of the object detection area.
Certainly, a kind of storage medium comprising computer executable instructions, computer provided by the embodiment of the present invention
Substance detection provided by any embodiment of the invention can also be performed in the method operation that executable instruction is not limited to the described above
Relevant operation in method.
By the description above with respect to embodiment, it is apparent to those skilled in the art that, the present invention
It can be realized by software and required common hardware, naturally it is also possible to which by hardware realization, but in many cases, the former is more
Good embodiment.Based on this understanding, technical solution of the present invention substantially in other words contributes to the prior art
Part can be embodied in the form of software products, which can store in computer readable storage medium
In, floppy disk, read-only memory (Read-Only Memory, ROM), random access memory (Random such as computer
Access Memory, RAM), flash memory (FLASH), hard disk or CD etc., including some instructions are with so that a computer is set
Standby (can be personal computer, server or the network equipment etc.) executes substance detection side described in each embodiment of the present invention
Method.
It is worth noting that, included each unit and module are only pressed in the embodiment of above-mentioned substance detection device
It is divided, but is not limited to the above division according to function logic, as long as corresponding functions can be realized；In addition,
The specific name of each functional unit is also only for convenience of distinguishing each other, the protection scope being not intended to restrict the invention.
The above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that this hair
It is bright to be not limited to specific embodiment described here, be able to carry out for a person skilled in the art it is various it is apparent variation, again
Adjustment and substitution are without departing from protection scope of the present invention.Therefore, although by above embodiments to the present invention carried out compared with
For detailed description, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, can be with
Including more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of detection method of substance characterized by comprising
Acquire the modal data of the nucleic of detected object；
Target detection corresponding with detected object area at least two object detection areas is determined according to the modal data
Domain；
The detected object is detected according to the nucleic detection threshold value of the object detection area.
2. the method according to claim 1, wherein further include:
X-ray detection range is divided by low energy detecting area to high energy detecting area or by high energy detecting area to low energy detecting area
At least two object detection areas, and the nucleic detection threshold value of each object detection area is determined respectively.
3. according to the method described in claim 2, it is characterized by further comprising:
The radiation feature that X-ray is determined according to the physical characteristic of at least two radioactive substances is determined according to X-ray radiation feature
X-ray detection range.
4. according to the method described in claim 2, it is characterized by further comprising:
It determines the X-ray sensitive region at least two object detection area, and the X-ray sensitive region is counted
It is handled according to weighting.
5. the method according to claim 1, wherein further include:
To X-ray generator, in starting and closing, generated amount of radiation step signal carries out the filtering processing of background sliding window.
6. a kind of substance detecting apparatus characterized by comprising
Modal data acquisition module, the modal data of the nucleic for acquiring detected object；
Detection zone determining module is detected for being determined at least two object detection areas according to the modal data with described
The corresponding object detection area of object；
Detection module, for being detected according to the nucleic detection threshold value of the object detection area to the detected object.
7. a kind of substance detection system characterized by comprising the bogey of detected object, X-ray generator and
Radiation monitoring device；Wherein, the radiation monitoring device includes substance detecting apparatus, and the substance detecting apparatus is used for right of execution
Benefit requires the detection method of any substance of 1-5.
8. system according to claim 7, which is characterized in that the radiation monitoring device includes at least one blind zone
Domain, wherein the shielding area is determined by covering card calculation method.
9. system according to claim 8, which is characterized in that the shielding area is provided with screen, the screen
For shielding X-ray, wherein the screen includes stereotype.
10. system according to claim 7, which is characterized in that the bogey of the detected object and the radiation
Stereotype is provided between monitoring device, the stereotype offers through-hole, and the diameter of the through-hole is more than or equal to the Radiation monitoring
The diameter of the probe of equipment.
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