CN205670194U - Detecting system based on back scattering imaging - Google Patents
Detecting system based on back scattering imaging Download PDFInfo
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- CN205670194U CN205670194U CN201620386682.9U CN201620386682U CN205670194U CN 205670194 U CN205670194 U CN 205670194U CN 201620386682 U CN201620386682 U CN 201620386682U CN 205670194 U CN205670194 U CN 205670194U
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- backscatter detector
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- radiographic source
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Abstract
The utility model discloses a kind of detecting system based on back scattering imaging, relate to backscattering technique field.Detecting system based on back scattering imaging should include radiographic source；Multipotency backscatter detector；Processing means, is connected with multipotency backscatter detector with radiographic source respectively；Wherein, radiographic source sends ray to checked object, and multipotency backscatter detector receives the ray through checked object scattering, and exports ray signal, processing means receives the ray signal from multipotency backscatter detector, processes ray signal to obtain the image rays source of checked object.Material based on checked object is different to the physical effect of the ray of different-energy, and this utility model can identify the density of checked object, atomic number and image more accurately, improves the material resolution capability of detecting system.
Description
Technical field
This utility model relates to backscattering technique field, particularly relates to a kind of detecting system based on back scattering imaging.
Background technology
In recent years, along with international community's attention to public safety, X-ray backscattering technique also obtains significant progress.X
Transmission of radiation technology can have an X-rayed inspected object, but the material discrimination ability to low atomic number, the most frivolous
Organic substance, as drugs, slim explosive etc. can not present well.Although X-ray backscattering technique penetration capacity is not so good as transmission,
But very sensitive to the material of low atomic number, the dangerous materials such as explosive, drugs can be able to be highlighted.It addition, it is green on highway
Agricultural product are also checked by backscattering technique intelligence in chrominance channel, it is to avoid wasting time and energy of hands inspection.
But current backscattering technique material resolution capability is extremely limited, the most a lot of non-violated Organic substances are with separated
Contraband goods drugs, explosive atomic number differences the least, existing backscattering technique be difficult to differentiate, significantly limit this technology should
With.The development of backscattering technique to be promoted, will promote the preferable resolution to low atomic number material, improve dividing of backscattering technique
The ability of distinguishing is a urgent need.
Along with more and more higher to checking system intellectuality demand, there is no the energy that the system intelligent of material resolution capability distinguishes
Power is the most limited, and rate of false alarm and rate of failing to report are the highest.The Back-scattering System with Object Classification ability just adapts to intelligentized requirement.
Utility model content
A technical problem to be solved in the utility model is to provide a kind of detecting system based on back scattering imaging, improves
The material resolution capability of detecting system.
According to utility model of the present invention on the one hand, a kind of detecting system based on back scattering imaging is proposed, including: ray
Source；Multipotency backscatter detector；Processing means, is connected with multipotency backscatter detector with radiographic source respectively；Wherein, radiographic source to
Checked object sends ray, and multipotency backscatter detector receives the ray through checked object scattering, and exports ray signal, place
Reason device receives the ray signal from multipotency backscatter detector, processes ray signal to obtain the image of checked object.
Further, multipotency backscatter detector is dual intensity backscatter detector；Dual intensity backscatter detector includes mental retardation
Backscatter detector and high energy backscatter detector.
Further, filter is also included；Filter is positioned at mental retardation backscatter detector and high energy back scattering detection
Between device.
Further, high energy backscatter detector includes multiple high energy back scattering probe unit, and multiple high energy back scatterings are visited
Survey unit to arrange at a predetermined interval.
Further, multipotency backscatter detector includes multiple backscatter detector mould being in diverse location and direction
Block.
Further, backscatter detector module is circular or oval ring-type, and the most each backscatter detector module is same
Axle is arranged；Or backscatter detector module is with rectangular array arrangement.
Further, radiographic source is multipotency radiographic source.
Further, radiographic source is dual intensity radiographic source.
Further, multipotency backscatter detector is planar array detector；And/or multipotency backscatter detector is by scintillator material
Material composition.
Further, scintillator material is organic scintillation crystal polystyrene.
According to another aspect of the present utility model, also provide for a kind of detecting system based on back scattering imaging, including: multipotency
Radiographic source；Backscatter detector；Processing means, is connected with backscatter detector with multipotency radiographic source respectively；Wherein, multipotency ray
Source generates the ray comprising multiple kinds of energy, and sends described ray to checked object, and backscatter detector receives through tested right
The ray that astigmatism is penetrated, and export ray signal, processing means receives the ray signal from backscatter detector, processes ray letter
Number with obtain checked object image.
Further, multipotency radiographic source is dual intensity radiographic source.
According to another aspect of the present utility model, also provide for a kind of detecting system based on many solid angles back scattering imaging,
Including: radiographic source；Backscatter detector；Processing means, is connected with backscatter detector with radiographic source respectively；Wherein, radiographic source
Sending ray to checked object, backscatter detector receives the ray of all directions through checked object scattering, and output is penetrated
Line signal, processing means receives the ray signal from backscatter detector, processes ray signal to obtain the figure of checked object
Picture, wherein backscatter detector includes multiple backscatter detector module being in diverse location and direction.
Further, backscatter detector module is ring-type, and the most each backscatter detector module is coaxially disposed；Or the back of the body dissipates
Penetrate detector module to arrange with rectangular array.
Compared with prior art, this utility model detecting system based on back scattering imaging includes that radiographic source, the multipotency back of the body dissipates
Penetrating detector and processing means, radiographic source sends ray to checked object, and multipotency backscatter detector receives through checked object
The ray of scattering, and export ray signal, processing means receives the ray signal from multipotency backscatter detector, processes ray
Signal is to obtain the image of checked object.Material based on checked object is different to the physical effect of the ray of different-energy, this
Utility model can identify density and the atomic number of checked object more accurately, and the material that improve detecting system differentiates energy
Power.
By detailed description to exemplary embodiment of the present utility model referring to the drawings, of the present utility model other
Feature and advantage thereof will be made apparent from.
Accompanying drawing explanation
The accompanying drawing of the part constituting description describes embodiment of the present utility model, and uses together with the description
In explaining principle of the present utility model.
Referring to the drawings, according to detailed description below, this utility model can be more clearly understood from, wherein:
Fig. 1 is the structural representation of first embodiment of this utility model detecting system based on back scattering imaging.
Fig. 2 is the structural representation of second embodiment of this utility model detecting system based on back scattering imaging.
Fig. 3 is the structural representation of the 3rd embodiment of this utility model detecting system based on back scattering imaging.
Fig. 4 is that the structure of the 4th embodiment of this utility model detecting system based on many solid angles back scattering imaging is shown
It is intended to.
Fig. 5 is that the structure of the 5th embodiment of this utility model detecting system based on many solid angles back scattering imaging is shown
It is intended to.
Fig. 6 is that the structure of the 6th embodiment of this utility model detecting system based on many solid angles back scattering imaging is shown
It is intended to.
Fig. 7 is the structural representation of the 7th embodiment of this utility model detecting system based on back scattering imaging.
Fig. 8 is the structural representation of the 8th embodiment of this utility model detecting system based on back scattering imaging.
Fig. 9 is that the flow process of an embodiment of the detection method of this utility model detecting system based on back scattering imaging is shown
It is intended to.
Figure 10 is that a demarcation of the detection method of this utility model detecting system based on back scattering imaging is intended to.
Figure 11 is the stream of another embodiment of the detection method of this utility model detecting system based on back scattering imaging
Journey schematic diagram.
Figure 12 is that another demarcation of the detection method of this utility model detecting system based on back scattering imaging is intended to.
Figure 13 is that another of the detection method of this utility model detecting system based on back scattering imaging demarcates intention.
Figure 14 is the stream of the further embodiment of the detection method of this utility model detecting system based on back scattering imaging
Journey schematic diagram.
Figure 15 is an enforcement of the detection method of this utility model detecting system based on many solid angles back scattering imaging
The schematic flow sheet of example.
Figure 16 is the schematic diagram of a concrete application of this utility model detecting system based on back scattering imaging.
Figure 17 is another schematic diagram specifically applied of this utility model detecting system based on back scattering imaging.
Detailed description of the invention
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should also be noted that it is unless another
Illustrating outward, the parts illustrated the most in these embodiments and positioned opposite, the numerical expression of step and numerical value do not limit
Make scope of the present utility model.
Simultaneously, it should be appreciated that for the ease of describing, the size of the various piece shown in accompanying drawing is not according to reality
Proportionate relationship draw.
Description only actually at least one exemplary embodiment is illustrative below, never as to this practicality
Any restriction that is novel and that apply or use.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of when, described technology, method and apparatus should be considered to authorize a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with specific embodiment, and
Referring to the drawings, this utility model is further described.
Fig. 1 is the structural representation of first embodiment of this utility model detecting system based on back scattering imaging.Should
Detecting system based on back scattering imaging includes radiographic source 110, multipotency backscatter detector 120 and processing means 130.Wherein locate
Reason device 130 is connected with multipotency backscatter detector 120 with radiographic source 110 respectively, is specifically as follows electrical connection.
Radiographic source 110 sends ray to checked object.Wherein, radiographic source 110 can produce flying spot X-ray, and it can be
General x-ray source adds specific collimator, it is also possible to be flying spot X-ray machine.
Multipotency backscatter detector 120 receives the ray through checked object scattering, and exports ray signal.
In one embodiment, multipotency backscatter detector 120 can be dual intensity backscatter detector, such as, comprises low
Can backscatter detector and high energy backscatter detector.Only it will be understood by those of skill in the art that dual intensity backscatter detector
Being for illustrating, multipotency backscatter detector can arrange multiple back scattering being able to receive that different-energy ray according to demand and visit
Survey device.
Processing means 130 receives the ray signal from multipotency backscatter detector 120, processes ray signal to obtain quilt
The image of inspection object.
Processing means 130 can be computer system, can control radiographic source and send ray, receives multipotency back scattering and visits
After surveying the ray signal of device 120 output, the physics of the ray backscatter signal of different-energy is imitated by material based on checked object
The difference answered, identifies density and the atomic number of checked object.Furthermore it is also possible to generate tested according to the ray signal received
The gray-scale map of object, and utilize multipotency back scattering recognition result to give pseudo-color to image, thus form the image of checked object.
In this embodiment, radiographic source sends ray to checked object, and multipotency backscatter detector receives through tested right
The ray that astigmatism is penetrated, and export ray signal, processing means receives the ray signal from multipotency backscatter detector, and process is penetrated
Line signal is to obtain the image of checked object.The material based on the checked object physics to the ray backscatter signal of different-energy
The difference of effect, this utility model takes multipotency backscatter detector to receive the ray through checked object scattering, it is possible to more
Identify checked object accurately, improve the material resolution capability of detecting system.
Fig. 2 is the structural representation of second embodiment of this utility model detecting system based on back scattering imaging.Should
Detecting system includes radiographic source 210, dual intensity backscatter detector 220 and processing means 230.
Radiographic source 210 sends ray to checked object.This radiographic source can only send the ray of a kind of energy, it is also possible to sends out
Send the ray of multiple kinds of energy.Such as, simultaneously or timesharing sends high-energy ray and low energy ray.
In one embodiment, as a example by the radiographic source only sending a kind of energy-ray, in order to improve detection efficiency, permissible
Two dual intensity backscatter detector 220 are set in radiogenic both sides, it is also possible to arrange one or more double as the case may be
Can backscatter detector 220.Dual intensity backscatter detector 220 can be visited by mental retardation backscatter detector 221 and high energy back scattering
Survey device 222 to form.Mental retardation backscatter detector 221 can receive the low energy ray through checked object scattering；High energy back scattering
Detector 222 can receive the high-energy ray through checked object scattering.
Mental retardation backscatter detector 221 and high energy backscatter detector 222 can be made up of same scintillator material, example
Such as organic scintillation crystal polystyrene, it is also possible to be made up of different scintillator materials.
In one embodiment, can also arrange between mental retardation backscatter detector 221 and high energy backscatter detector 222
Filter 223, is specifically as follows filter plate, constitutes the detector of sandwich structure.Filter plate can absorb a part of ray
Energy, with effectively pull open the energy difference of high mental retardation backscatter detector away from.The material of filter plate can be aluminum, ferrum, copper, silver or
Gold, or their alloy material.
Owing to backscatter signal Relative Transmission is weak, therefore detection mode and the method for analysis are the most different, the present embodiment
In the dual intensity backscatter detector of sandwich structure can be planar array detector, detect overall letter from corner effect and energy effect
Number, therefore, it is possible to preferably detect the faint ray of checked object scattering.
Processing means 230 receives high-energy ray signal and the low energy ray signal of dual intensity backscatter detector output, based on
The material difference to the physical effect of different-energy signal, tells density or the atomic number of checked object.
The ray signal of different-energy can also be generated the gray level image of checked object by processing means 230, carries on the back with dual intensity
Scattering recognition result gives pseudo-color to image.Send due to radiographic source is the ray of a kind of energy, therefore need not life
The image become registrates.
When identifying the material of checked object, the detecting system scanning known materials in this embodiment can be advanced with,
The sample of such as drugs, explosive or analogies, leatherware, medicated cigarette, metal etc., and record the output of dual intensity backscatter detector
High-energy ray signal and low energy ray signal, can be by known materials and high-energy ray signal and the mapping of low energy ray signal
Relation is saved in tables of data, it is also possible to demarcate by the mode of coordinate system.Such as, in coordinate system, each pixel can be right
Should known materials accordingly.When the detecting system utilizing this utility model back scattering imaging detects the checked object of unknown material
Time, know high-energy ray signal and low energy ray signal that dual intensity backscatter detector exports and to comparison in coordinate system, so that it may
Determine the material of checked object.In this embodiment, it is also possible to utilize the material of material classifier identification checked object, the most not
Describe in detail again.
In this embodiment, by arranging penetrating of different-energy that dual intensity backscatter detector detects that checked object scatters
Line signal, and then density and the atomic number of checked object can be identified, this detecting system is applied to safe examination system, permissible
Effectively identify drugs, explosive etc., improve the intelligence degree of detection, decrease the working strength of safety inspector.
Fig. 3 is the structural representation of the 3rd embodiment of this utility model detecting system based on back scattering imaging.Penetrate
Line source 310, mental retardation backscatter detector 320, filter 340 and processing means 350 respectively with the radiographic source 210 in Fig. 2, low
Energy backscatter detector 221, filter 223 are identical with processing means 230, and are introduced the most in the above-described embodiments,
The most no longer further spread out description.
High energy backscatter detector 330 can include multiple high energy back scattering probe unit, high energy back scattering probe unit
Can be strip, and arrange at a predetermined interval.Such as, each high energy back scattering probe unit enters with horizontal, vertical or other modes
Row arrangement.
Design in this embodiment, can reduce cost, and be obtained, by mental retardation backscatter detector, the ash that signal to noise ratio is high
Degree image, is obtained, by high energy backscatter detector, the material discrimination rate that cost performance is high, and gives pseudo-color for image, it is possible to be more accurate
True identifies whether checked object comprises prohibited items.
In another embodiment, as shown in Figure 4, the back of the body in detecting system 400 based on many solid angles back scattering imaging
Scattering detector 410 includes multiple backscatter detector module being in diverse location and direction, such as, A1, A2, B, location of C
Represent the backscatter detector module at four visual angles respectively.A1 and A2 is near radiographic source 420, B and C is away from radiographic source 420.One
In individual embodiment, backscatter detector 410 can be with multipotency backscatter detector, it is also possible to for common backscatter detector.Below
Illustrate as a example by common backscatter detector.
Back scattering effect and ray energy, angle of scattering, angle of reflection have more complicated relation, such as, scattered photon
Energy is:
ErIt is incident photon energy, Er'Being scattered photon energy, θ is angle of scattering, it can be seen that scattered signal and energy and
Angle is correlated with.
Different directions is penetrated by the detecting system based on many solid angles back scattering imaging in this embodiment by different material
The physical effect difference of line identifies material.When radiographic source 420 is after checked object 440 sends ray, and ray is through quilt
The scattering of inspection object, is received by backscatter detector 410.Backscatter detector modules A, backscatter detector module B, back scattering
The ray received is converted to ray signal and exports to processing means by detector module C and backscatter detector module D respectively
430.Processing means 430 identifies the material of checked object according to the characteristic of the ray signal of different directions.Processing means 430 is also
Backscatter signal can be utilized to obtain the gray-scale map of checked object, utilize material discrimination result to add pseudo-color to image, it is achieved
High-resolution and effective combination of high performance-price ratio material discrimination.
Such as, when detecting system flying spot source is just to the region between region i.e. checked object L1 and L2, the back of the body is dissipated
The ray penetrating detector module A1+A2 reception is output as the ray signal in a direction, by backscatter detector module B or C
The ray received is output as the ray signal in another direction.When scanning other regions, receive with backscatter detector module B
Ray be output as the ray signal in a direction, be output as another direction with the ray that backscatter detector module C receives
Ray signal.The difference relying on the ray signal detected in both direction just can identify the material of checked object.Existing
Having in technology, multi-view X ray technology mainly solves single-view image and blocks or stack-up issue, and of the present utility model based on many
The detecting system of solid angle back scattering imaging can solve the problem that the problem of Object Classification, has the biggest practicality.
In one embodiment, the detection system based on many solid angles back scattering imaging in the present embodiment can be used in advance
System scanning known materials, and then the ray signal of the different directions of record known materials scattering, can be by known materials from different
The mapping relations of the ray signal in direction are saved in tables of data, it is also possible to demarcate by the mode of coordinate system.Such as, coordinate
In system, each pixel can corresponding corresponding known materials.When utilizing the unknown material of detecting system based on back scattering imaging detection
During the checked object of material, know the ray signal of all directions that backscatter detector export and to comparison in coordinate system, so that it may true
Determine the material of checked object.In one embodiment, it is also possible to utilize the material of material classifier identification checked object, the most not
Describe in detail again.
It will be understood by those of skill in the art that backscatter detector 410 can be included as many according to practical situation setting
Kind of diverse location, backscatter detector module without direction.Such as, as it is shown in figure 5, different back scattering device modules is with rectangle
Array way is arranged.Such as backscatter detector 410 is divided into the back scattering at 8 visual angles such as A, B, C, D, E, F, G and H and visits
Survey device module.When identifying the material of inspected object, mathematically 8 dimensional space record nominal datas and test number can be used
According to, thus carry out the resolution of the material to measurand.
In another embodiment of the present utility model, utilizing geometrically symmetric feature, backscatter detector module is permissible
Being set to ring-type, the most circular or oval ring-type, as shown in Figure 6,620 is the first backscatter detector module, and 630 is
Two backscatter detector modules, two backscatter detector modules are coaxially disposed.Radiographic source 610 sends ray to checked object,
Ray is after checked object scatters, respectively by the first backscatter detector module 620 and the second backscatter detector module 630
From two angular acceptance, and exporting the ray signal of two angles to processing means 640, processing means 640 relies on two sides
The difference of the ray signal upwards detected can identify the material of checked object.
Such as, when identifying the material of checked object, the detecting system scanning in this embodiment can be advanced with known
The sample of material, such as drugs, explosive or analogies, leatherware, medicated cigarette, metal etc., and record the first back scattering detection
The first direction ray signal of device module 620 output and the second direction ray letter of the second backscatter detector module 630 output
Number, the mapping relations of known materials Yu both direction ray signal can be saved in tables of data, it is also possible to by coordinate system
Mode is demarcated.Such as, in coordinate system, each pixel can corresponding corresponding known materials.When utilizing in the present embodiment
When detecting system based on back scattering imaging detects the checked object of unknown material, know the first backscatter detector module 620
Output first direction ray signal and the second backscatter detector module 630 output second direction ray signal and arrive coordinate
Comparison in system, so that it may determine the material of checked object.In one embodiment, it is also possible to utilize material classifier identification tested right
The material of elephant, the most no longer describes in detail.
It will be understood by those of skill in the art that comprise in this embodiment two backscatter detector moulds being coaxially disposed
Block is only used for citing, it is also possible to be arranged as required to multiple backscatter detector module.
In a particular application, it is also possible to as it is shown in fig. 7, backscatter detector can only retain the part in dotted line frame or only
Part in retention point wire frame.It is adapted to feature and the restriction of equipment installation of test body, reduces the requirement to test site,
Provide cost savings simultaneously.
In this embodiment, by arranging circular or oval ring-type backscatter detector module, utilize geometrically symmetric
Feature, more succinct in follow-up signal processing, such as, algorithm process is simpler, reduce data answering of processing
Miscellaneous degree, it is possible to identify density and the atomic number of checked object more accurately.
Fig. 8 is the structural representation of the 8th embodiment of this utility model detecting system based on back scattering imaging.Should
Detecting system includes multipotency radiographic source 810, backscatter detector 820 and processing means 830, wherein processing means 830 respectively with
Dual intensity radiographic source 810 is connected with backscatter detector 820, is specifically as follows electrical connection.
Multipotency radiographic source 810 generates the ray comprising multiple kinds of energy, and sends ray to checked object.An embodiment
In, multipotency radiographic source is dual intensity radiographic source, can simultaneously or timesharing sends ray to checked object.Those skilled in the art should
Working as understanding, dual intensity radiographic source is only for citing, can arrange radiographic source according to demand and send the signal of multiple kinds of energy.
Backscatter detector 820 receives the ray through checked object scattering, and exports ray signal.Such as, multipotency is worked as
When radiographic source 810 is dual intensity radiographic source, backscatter detector 820 exports high-energy ray signal and low energy ray signal.Wherein, the back of the body
Scattering detector 820 can be multipotency backscatter detector, it is also possible to for common backscatter detector.
Processing means 830 receives the ray signal from backscatter detector 820, processes ray signal tested right to obtain
The image of elephant.When multipotency radiographic source 810 timesharing sends different-energy ray, the image to generating is needed to registrate, when many
When energy radiographic source 810 sends the ray of different-energy simultaneously, it is not necessary to the image generated is registrated.
After processing means 830 receives the ray signal of different-energy, based on the material ray back scattering to different-energy
The difference of the physical effect of signal, it is possible to tell density or the atomic number of checked object, it is tested right effectively to identify
The material of elephant.
In this embodiment, multipotency radiographic source is used, based on the material physics to the ray backscatter signal of different-energy
The difference of effect, can effectively identify image and the material of checked object, this detecting system is applied to safe examination system, permissible
Effectively identify drugs, explosive etc., improve the intelligence degree of detection, decrease the working strength of safety inspector.
Fig. 9 is that the flow process of an embodiment of the detection method of this utility model detecting system based on back scattering imaging is shown
It is intended to.The method comprises the following steps:
In step 910, control radiographic source and send ray to checked object.
Wherein, the ray of transmission can be the ray of a kind of energy, it is also possible to comprise the ray of multiple kinds of energy.
In step 920, obtain the ray signal of the different-energy of the checked object scattering that multipotency backscatter detector receives.
In one embodiment, multipotency backscatter detector is dual intensity backscatter detector, such as, comprises mental retardation back scattering
Detector and high energy backscatter detector.The low energy ray signal of the checked object scattering that mental retardation backscatter detector receives is high
The high-energy ray signal of the checked object scattering that energy backscatter detector receives.
In step 930, ray signal based on different-energy generates the image of checked object.
Can the material based on the checked object difference to the physical effect of the ray backscatter signal of different-energy, differentiate
Go out density or the atomic number of checked object.Furthermore it is also possible to generate the gray-scale map of checked object according to the ray signal received,
And utilize multipotency back scattering recognition result to give pseudo-color to image, thus form the image of checked object.
In one embodiment, formula computational methods can be used or identify the material of checked object by the method demarcated
Material.Such as, the sample of previously-scanned known materials, such as drugs, explosive or analogies, leatherware, medicated cigarette, metal etc., and
Record high-energy ray signal and the low energy ray signal of the output of dual intensity backscatter detector, known materials can be penetrated with high energy
The mapping relations of line signal and low energy ray signal are saved in tables of data, it is also possible to demarcate by the mode of coordinate system.As
Shown in Figure 10, the low energy ray signal detected with dual intensity backscatter detector is as abscissa, with the high-energy ray letter detected
Number being vertical coordinate, in coordinate system, (i, j) can corresponding corresponding known materials for each pixel.Detect not when utilizing detecting system
When knowing the checked object of material, know high-energy ray signal and low energy ray signal that dual intensity backscatter detector exports and to sitting
Comparison in mark system, so that it may determine the material of checked object.In another embodiment, it is also possible to utilize material classifier identification quilt
The material of inspection object, the most no longer describes in detail.
In this embodiment, detect that the ray of different-energy that checked object scatters is believed by multipotency backscatter detector
Number, and then density and the atomic number of checked object can be identified, and this detecting system is applied to safe examination system, can be effective
Identify drugs, explosive etc., improve the intelligence degree of detection, decrease the working strength of safety inspector.
Figure 11 is the stream of another embodiment of the detection method of this utility model detecting system based on back scattering imaging
Journey schematic diagram.The method can also include:
In step 1110, obtain the ray of the multiple directions scattered by checked object that multipotency backscatter detector receives
Signal.
Can as shown in Figure 4, backscatter detector includes multiple backscatter detector mould being in diverse location and direction
Block, A1, A2, B, location of C represent the backscatter detector module at four visual angles respectively, and each backscatter detector module receives each
The ray of direction scattering.Can also as shown in Figure 6, backscatter detector module could be arranged to circular or oval ring-type, the
One backscatter detector module and the second backscatter detector module receive the ray that checked object scatters from two angles respectively.
In step 1120, ray signal based on different directions generates the image of checked object.
In one embodiment, the detecting system scanning known materials in the present embodiment, and then record can be used in advance
The ray signal of the different directions of known materials scattering, can be by the mapping relations of known materials Yu the ray signal of different directions
It is saved in tables of data, it is also possible to demarcate by the mode of coordinate system.As shown in Figure 12 and Figure 13, each pixel in coordinate system
Point can corresponding corresponding known materials.When utilizing the checked object of detecting system detection unknown material, know that back scattering is visited
Survey the ray signal of all directions of device output and to comparison in coordinate system, so that it may determine the material of checked object.Real at another
Execute in example, it is also possible to utilize the material of material classifier identification checked object, the most no longer describe in detail.
Figure 14 is the stream of the further embodiment of the detection method of this utility model detecting system based on back scattering imaging
Journey schematic diagram.
In step 1410, control radiographic source and send the ray of different-energy to checked object.
In one embodiment, radiographic source is dual intensity radiographic source, can simultaneously or timesharing sends two kinds of energy to checked object
The ray of amount.
In step 1420, obtain the ray signal of the different-energy of the checked object scattering that backscatter detector receives.
When radiographic source is dual intensity radiographic source, backscatter detector output high-energy ray signal and low energy ray signal.
In step 1430, ray signal based on different-energy generates the image of checked object.
The material based on the checked object difference to the physical effect of the ray backscatter signal of different-energy, tell by
The density of inspection object or atomic number.Furthermore it is also possible to the ray signal of different-energy to be generated the gray level image of checked object,
Give pseudo-color with dual intensity back scattering recognition result to image, thus form the image of checked object.
In one embodiment, formula computational methods can be used or identify the material of checked object by the method demarcated
Material.Such as, the sample of previously-scanned known materials, such as drugs, explosive or analogies, leatherware, medicated cigarette, metal etc., and
Record high-energy ray signal and the low energy ray signal of backscatter detector output, known materials can be believed with high-energy ray
Number and the mapping relations of low energy ray signal be saved in tables of data, it is also possible to demarcate by the mode of coordinate system.Such as Figure 10
Shown in, the low energy ray signal detected with dual intensity backscatter detector, as abscissa, with the high-energy ray signal detected is
Vertical coordinate, in coordinate system, (i, j) can corresponding corresponding known materials for each pixel.When utilizing the unknown material of detecting system detection
During the checked object of material, know high-energy ray signal and low energy ray signal that backscatter detector export and to ratio in coordinate system
Right, so that it may to determine the material of checked object.In another embodiment, it is also possible to utilize material classifier identification checked object
Material, the most no longer describes in detail.
In this embodiment, multipotency radiographic source is used, based on the material physics to the ray backscatter signal of different-energy
The difference of effect, can effectively identify image and the material of checked object, this detecting system is applied to safe examination system, permissible
Effectively identify drugs, explosive etc., improve the intelligence degree of detection, decrease the working strength of safety inspector.
Figure 15 is an enforcement of the detection method of this utility model detecting system based on many solid angles back scattering imaging
The schematic flow sheet of example.The method can also include:
In step 1510, control radiographic source and send ray to checked object.
In step 1520, obtain the ray letter of the multiple directions scattered by checked object that backscatter detector receives
Number.Wherein, backscatter detector can be common backscatter detector.Can as shown in Figure 4, backscatter detector includes multiple
Being in the backscatter detector module in diverse location and direction, A1, A2, B, location of C represent the back scattering at four visual angles respectively and visit
Surveying device module, each backscatter detector module receives the ray of all directions scattering.Can also be as it is shown in figure 5, the different back ofs the body dissipates
Emitter module is arranged in rectangular array mode.Can also as shown in Figure 6, backscatter detector module could be arranged to annulus
Shape or oval ring-type, the first backscatter detector module and the second backscatter detector module receive checked object respectively from two
The ray of angle scattering.
In step 1530, ray signal based on different directions generates the image of checked object.
In one embodiment, the detecting system scanning known materials in the present embodiment, and then record can be used in advance
The ray signal of the different directions of known materials scattering, can be by the mapping relations of known materials Yu the ray signal of different directions
It is saved in tables of data, it is also possible to demarcate by the mode of coordinate system.As shown in Figure 12 and Figure 13, each pixel in coordinate system
Point can corresponding corresponding known materials.When utilizing the checked object of detecting system detection unknown material, know that back scattering is visited
Survey the ray signal of all directions of device output and to comparison in coordinate system, so that it may determine the material of checked object.Real at another
Execute in example, it is also possible to utilize the material of material classifier identification checked object, the most no longer describe in detail.
Detecting system of the present utility model and method thereof may apply to scan the safety check necks such as vehicle, goods, luggage, people
Territory, it is achieved back scattering imaging and Object Classification.
Such as, during by the dolly near detecting system based on back scattering imaging scanning harbour or goods, as shown in figure 16,
In bayonet socket inspection post, radiographic source 1610 and dual-energy detector 1630 are arranged at bayonet socket, and processing means marks the most in the drawings.Moving
Formula checks system, and radiographic source 1610 and dual-energy detector 1630 may be mounted at vehicular and check on the cantilever of system or install
On vehicle.Radiographic source 1610 launches X-ray to dolly 1620, and X-ray is through the scattering of dolly 1620, by dual-energy detector
1630 receive and export ray signal, through certain process, so that it may detect and whether carry dangerous goods in dolly, and danger
Danger article what material are made up of.The accuracy of identification can be improved, reduce Wu's report rate.
In another application examples, should detecting system based on back scattering imaging can apply in back scattering object machine system
System.As shown in figure 17.Transmit case and bag 1720 on conveyer belt 1710, in order to improve detection efficiency, many sets can be set and dissipate based on the back of the body
Penetrate the detecting system of imaging, as arranged radiographic source 1730 and dual-energy detector 1740 in the both sides of case and bag (up and down or left and right), place
Reason device marks not in the drawings.Radiographic source 1730 sends X-ray to the case and bag 1720 passed through, and X-ray is through case and bag 1720
Scattering, is received by dual-energy detector 1740 and exports ray signal, through certain process, so that it may knowing the thing carried in case and bag
Product.Compared with Traditional x-ray object machine, detecting system of the present utility model can preferably identify in case and bag interlayer the most hidden
Keep drugs or explosive.
This utility model is highly suitable for the safety check environment that handling capacity is big, owing to having good material resolution capability, intelligence
Degree can be changed higher, reduce the operation easier of safety inspector, improve the accuracy rate of inspection, reduce rate of false alarm.
So far, this utility model is described in detail.In order to avoid covering design of the present utility model, this is not described
Some details well known to field.Those skilled in the art are as described above, complete it can be appreciated how implement public here
The technical scheme opened.
Although by example, specific embodiments more of the present utility model have been described in detail, but this area
It is to be understood by the skilled artisans that above example is merely to illustrate rather than in order to limit scope of the present utility model.This
Field it is to be understood by the skilled artisans that can be in the case of without departing from scope and spirit of the present utility model, to above example
Modify.Scope of the present utility model is defined by the following claims.
Claims (14)
1. a detecting system based on back scattering imaging, it is characterised in that including:
Radiographic source；
Multipotency backscatter detector；
Processing means, is connected with described multipotency backscatter detector with described radiographic source respectively；
Wherein, described radiographic source sends ray to checked object, and described multipotency backscatter detector receives through described tested right
The ray that astigmatism is penetrated, and export ray signal, the ray that described processing means receives from described multipotency backscatter detector is believed
Number, process described ray signal to obtain the image of described checked object.
System the most according to claim 1, it is characterised in that described multipotency backscatter detector is dual intensity back scattering detection
Device；
Described dual intensity backscatter detector includes mental retardation backscatter detector and high energy backscatter detector.
System the most according to claim 2, it is characterised in that also include filter；
Described filter is between described mental retardation backscatter detector and described high energy backscatter detector.
4. according to the system described in Claims 2 or 3, it is characterised in that
Described high energy backscatter detector includes multiple high energy back scattering probe unit, the plurality of high energy back scattering probe unit
Arrange at a predetermined interval.
System the most according to claim 1, it is characterised in that
Described multipotency backscatter detector includes multiple backscatter detector module being in diverse location and direction.
System the most according to claim 5, it is characterised in that
Described backscatter detector module is ring-type, and the most each backscatter detector module is coaxially disposed；
Or
Described backscatter detector module is arranged with rectangular array.
System the most according to claim 1, it is characterised in that
Described radiographic source is multipotency radiographic source.
System the most according to claim 7, it is characterised in that
Described radiographic source is dual intensity radiographic source.
9. according to the arbitrary described system of claim 1-3, it is characterised in that
Described multipotency backscatter detector is planar array detector；
And/or
Described multipotency backscatter detector is made up of scintillator material.
System the most according to claim 9, it is characterised in that
Described scintillator material is organic scintillation crystal polystyrene.
11. a detecting system based on back scattering imaging, it is characterised in that including:
Multipotency radiographic source；
Backscatter detector；
Processing means, is connected with described backscatter detector with described multipotency radiographic source respectively；
Wherein, described multipotency radiographic source generates the ray comprising multiple kinds of energy, and sends described ray, the described back of the body to checked object
Scattering detector receives the ray that scatters through described checked object, and exports ray signal, described processing means receive from
The ray signal of described backscatter detector, processes described ray signal to obtain the image of described checked object.
12. systems according to claim 11, it is characterised in that
Described multipotency radiographic source is dual intensity radiographic source.
13. 1 kinds of detecting systems based on many solid angles back scattering imaging, it is characterised in that including:
Radiographic source；
Backscatter detector；
Processing means, is connected with described backscatter detector with described radiographic source respectively；
Wherein, described radiographic source sends ray to checked object, and described backscatter detector receives and dissipates through described checked object
The ray of all directions penetrated, and export ray signal, described processing means receives the ray from described backscatter detector
Signal, processes the described ray signal image with the described checked object of acquisition, and wherein said backscatter detector includes multiple place
Backscatter detector module in diverse location and direction.
14. systems according to claim 13, it is characterised in that
Described backscatter detector module is ring-type, and the most each backscatter detector module is coaxially disposed；
Or
Described backscatter detector module is arranged with rectangular array.
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| CN201620386682.9U CN205670194U (en) | 2016-04-29 | 2016-04-29 | Detecting system based on back scattering imaging |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807328A (en) * | 2016-04-29 | 2016-07-27 | 同方威视技术股份有限公司 | Detecting system and method based on back scattering imaging |
| CN106829388A (en) * | 2017-03-10 | 2017-06-13 | 天津工业大学 | Conveyer band discerption fault detection method and device based on X-ray backscattering technology |
| CN108121014A (en) * | 2017-12-07 | 2018-06-05 | 公安部第三研究所 | Perspective view scatters array detection system and method |
| CN108333620A (en) * | 2018-02-26 | 2018-07-27 | 奕瑞新材料科技（太仓）有限公司 | The localization method of detection device and middle low energy gamma source |
| CN113960087A (en) * | 2021-10-18 | 2022-01-21 | 山东芯慧微电子科技有限公司 | Image acquisition system for X-ray back scattering security inspection system |
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2016
- 2016-04-29 CN CN201620386682.9U patent/CN205670194U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807328A (en) * | 2016-04-29 | 2016-07-27 | 同方威视技术股份有限公司 | Detecting system and method based on back scattering imaging |
| CN106829388A (en) * | 2017-03-10 | 2017-06-13 | 天津工业大学 | Conveyer band discerption fault detection method and device based on X-ray backscattering technology |
| CN108121014A (en) * | 2017-12-07 | 2018-06-05 | 公安部第三研究所 | Perspective view scatters array detection system and method |
| CN108333620A (en) * | 2018-02-26 | 2018-07-27 | 奕瑞新材料科技（太仓）有限公司 | The localization method of detection device and middle low energy gamma source |
| CN108333620B (en) * | 2018-02-26 | 2023-08-15 | 张岚 | Detection device and positioning method of medium-low energy ray source |
| CN113960087A (en) * | 2021-10-18 | 2022-01-21 | 山东芯慧微电子科技有限公司 | Image acquisition system for X-ray back scattering security inspection system |
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