CN105784741A - Multi-visual-angle X ray safety check device - Google Patents
Multi-visual-angle X ray safety check device Download PDFInfo
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- 238000001514 detection method Methods 0.000 abstract description 13
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
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- 239000002360 explosive Substances 0.000 description 3
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Abstract
The invention discloses a multi-visual-angle X ray safety check device adopting 3 visual angle layout structure; ray sources corresponding to 3 visual angles are all located below a transfer channel of the device; the 3 visual angles are respectively located at the left side, the middle part and the right side of the lower side of the transfer channel; the 3 visual angles are composed of the 3 groups of X ray sources and detectors; each group of X ray source and detector forms a detection unit, wherein the detection units are a left side bottom-illuminating visual angle module, a right side side-illuminating visual angle module and a middle part bottom-illuminating visual angel module arranged below the transfer channel; the left side bottom-illuminating visual angle module comprises a left side bottom-illuminating X ray source and a first detector; the right side bottom-illuminating visual angle module comprises a right side bottom-illuminating X ray source and a second detector; the middle part bottom-illuminating visual angel module comprises a middle part bottom-illuminating X ray source and a third detector. The multi-visual-angle X ray safety check device has the advantages of strong check ability, fast check speed, high detection sensitivity, accurate detection, and strong capacity of resisting disturbance.
Description
Technical field
The present invention relates to a kind of multi-view X ray safety inspection device, belong to x-ray imaging safety inspection technical field.
Background technology
At present, luggage entrained by personnel by important gateway is implemented the safety measure that safety inspection has become widely used in the world, for luggage safety checking, X-ray safety inspection device is a currently used most commonly used contactless safety inspection device of class, in recent years, X-ray safety inspection device is subject to aviation, railway, the ordering about of customs's safety need, and is developed rapidly.The X-ray safety inspection device used the earliest adopts single-view Single energy X ray absorptionmetry technology, and this kind of inspection device is generally mainly made up of single x ray generator, collimator, detector, passage, conveyer belt and casing.During system work, examined luggage is sent into passage by conveyer belt, the luggage on the fan-shaped x-ray beam traverse conveyer belt of collimation, and the X-ray signal that detector produces when receiving absorbed forms picture signal after postorder special handling and shows over the display.Single-view Single energy X ray absorptionmetry safety inspection device can judge whether to would be likely to occur known violated thing by the shape facility in each region in observation picture signal.Along with the raising that safety inspection requires, the safety inspection device adopting dual energy X-ray technique is used widely gradually, there is two kinds of dual-energy X ray safety inspection device at present, a kind of is the double energy X-ray baggage inspection apparatus of standard or routine, adopting source two spy, quasi-double energy X-ray, the luggage Negotiation speed of this device is slow, need hand inspection, be commonly used to the inspection of conventional hand-baggage and checked baggage；Another kind of double energy X-ray safety check apparatus, adopts the double; two spy of double source, produces real dual-energy X ray, and the luggage Negotiation speed of this device is fast, it is possible to realize detection automatically, is commonly used to multistage automatic checked baggage inspection system.Dual-energy X ray safety inspection device can estimate material effective atomic number, and it utilizes certain material to the difference in the X-ray absorption performance of different-energy to differentiate this material so that can not be distinguished by material behavior by the material that shape distinguishes.
In order to meet the safety inspection demand of higher detection accuracy, x-ray ct technology has been introduced in safety inspection field, occurs in that the CT type explosive safety inspection device adopting x-ray ct technology.Such device has high density resolution, it require that the data volume processed is huge, it is thus achieved that the time of image is more much longer than other system, and manufacturing cost is also very high, these all constrain the universal of X ray CT type safety inspection device and application.
Multi-view X ray safety inspection device is exactly produce in this context, it adopts multiple fixed viewpoint double energy X-rays that material is scanned, material feature by dual energy X-ray image signal acquisition object, backprojection image reconstruction checking matter cross section by various visual angles, obtain material density feature, thus reaching the more accurate physical property detection of checking matter.
Multi-view X ray detecting device is existing application in medical science and industrial detection, but adopts the channel-type multi-view X ray luggage safety inspection device of line scanning technique in recent years just occur and develop.U.S. Patent Publication No. is the patent of US6088423, US7020241 and the patent that China Patent Publication No. is CN101592622, CN203224459 all relates to multi-view X ray safety detection method and device.U.S. Patent Publication No. be at the bottom of the device that the patent of US6088423 is invented adopts 2 according to top, 1 side, source according to source, form 3 visual angle x-ray sources and detector layout type that 3 sources 3 are visited；U.S. Patent Publication No. is the 5 visual angle mode of operations that the device that the patent of US7020241 is invented have employed that 3 sources 5 are visited, and at the bottom of adopting 2 in various visual angles layout, irradiate line source and 1 top irradiation line source, line source corresponding 2 groups of detectors respectively are irradiated at each end, and top is irradiated the corresponding 1 group of detector of line source and formed 5 visual angles；China Patent Publication No. be at the bottom of the multi-view X ray safety inspection device that the patent of CN101592622 relates to adopts 2 according to source and 1 top according to source, form the three visual angle mode of operations that 3 sources 3 are visited, at the bottom of its 1, have employed the real dual-energy visual angle layout of dijection line source double detector according to visual angle；China Patent Publication No. be at the bottom of the multi-view X ray safety inspection device that the patent of CN203224459 relates to adopts 3 according to source and 1 side according to source, 4 visual angle mode of operations are visited in 4 sources 4 that formed.
Above 4 kinds of multi-view X ray safety inspection devices are visited in viewing angle distribution, source and all be there is detectivity and the relatively low shortcoming of capacity of resisting disturbance in layout.
Summary of the invention
It is an object of the invention to provide a kind of multi-view X ray safety inspection device that can overcome above-mentioned technical problem, the present invention by the multi-angle X ray being positioned at around device transfer passage to luggage and articles imaging, material feature and the density feature of inspected object can be obtained simultaneously, explosive therein can be detected when not opening bag fast automaticly, have the advantages that detectivity and accuracy are high, capacity of resisting disturbance is strong, it is adaptable to civil aviaton, railway, customs's important place safety check system.
A kind of multi-view X ray safety inspection device of the present invention adopts 3 visual angle layout structures；Positive apparent direction from the transfer passage of a kind of multi-view X ray safety inspection device of the present invention, the corresponding radiographic source at described 3 visual angles is respectively positioned on the lower section of device transfer passage, and described 3 visual angles lay respectively at the left side below transfer passage, middle part, position, 3, right side；Described 3 visual angles are made up of 3 groups of x-ray sources and detector, often group x-ray source and detector are called a probe unit, wherein, described probe unit is be installed at the bottom of the left side below transfer passage to shine at the bottom of visual angle module and middle part according to visual angle module according to visual angle module, side, right side；The end, left side is included according to x-ray source and the first detector according to visual angle module at the bottom of described left side；The end, right side is included according to x-ray source and the second detector according to visual angle module at the bottom of described right side；The end, middle part is included according to x-ray source and the 3rd detector according to visual angle module at the bottom of described middle part.
Described first detector, the second detector all adopt L-type detector, and the 3rd detector adopts U-shaped detector.
A kind of multi-view X ray safety inspection device of the present invention is being provided with, according to x-ray source position place, the collimator that X-ray beam is formed thin fan beam according to shining at the bottom of x-ray source, right side at the bottom of x-ray source and middle part at the bottom of described left side respectively.
A kind of multi-view X ray safety inspection device of the present invention also includes system control and signal processing circuit unit and system control and signal processing circuit unit carries out data transmission integrated treatment computer, conveyer and transfer passage.
When multi-view X ray safety inspection device of the present invention starts, examined parcel is sent in transfer passage by described conveyer, parcel is carried out transmission scan by described in multi-view X ray safety inspection device 3 the visual angle X ray utilizing the present invention, when described first detector, second detector, the signal that 3rd detector receives is after system control and signal processing circuit unit process, send integrated treatment computer to, and then in described integrated treatment computer, parcel image is carried out safety inspection analysis, and will check that result shows on the display of integrated treatment computer.
The invention have the advantages that
1) checking ability is strong, and 3 visual angle X ray of the present invention are entirely located in device and check the lower section of passage, and different size, parcel dissimilar, differing complexity can effectively be detected by such detection mode.
2) check that speed is fast, 1800 parcels can be detected per hour, be suitable for the luggage safety checking field of high pass rate.
3) detectivity height and detection accurately, can detect density and two characteristic quantities of effective atomic number simultaneously.
Additionally, the present invention also has the feature that capacity of resisting disturbance is strong, it is adaptable to civil aviaton, railway, customs place safety check system.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of multi-view X ray safety inspection device of the present invention；
Fig. 2 is the front elevational schematic of Fig. 1 shown device structure channel and radiographic source position；
Fig. 3 is the schematic top plan view of Fig. 1 shown device structure channel and detector position；
Fig. 4 is the schematic side view of Fig. 1 shown device structure channel and spy position, source；
Fig. 5 is the workflow schematic diagram of the multi-view X ray luggage explosive substance automatic detection device of a kind of multi-view X ray safety inspection device of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention are described in detail.As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, multi-view X ray safety inspection device of the present invention includes the end, left side according to shining at the bottom of visual angle module, right side at the bottom of visual angle module and middle part according to visual angle module, multi-view X ray safety inspection device of the present invention also includes system control and signal processing circuit unit 8, integrated treatment computer 7, conveyer 11 and transfer passage 5.
As shown in Figure 2, Figure 3 and Figure 4, shining at the bottom of photograph x-ray source 9, right side at the bottom of the left side of multi-view X ray safety inspection device of the present invention and shining x-ray source 2 at the bottom of x-ray source 10, middle part is lay respectively at the different azimuth below transfer passage 5, namely in the positive apparent direction of described transfer passage 5, it is arranged at the bottom right side position of transfer passage 5 according to x-ray source 9 at the bottom of described left side, it is arranged at the bottom right side of transfer passage 5 at the bottom of described right side according to x-ray source 10, is arranged at bottom the middle part of transfer passage 5 according to x-ray source 2 at the bottom of described middle part.
Equally, correspond respectively at the bottom of described left side according at the bottom of x-ray source 9, right side according to the diverse location being attached respectively to described transfer passage 5 at the bottom of x-ray source 10, middle part according to L-type first detector 4 of x-ray source 2, L-type the second detector 3, U-shaped 3rd detector 1.
Additionally, shine according to x-ray source 2 at the bottom of x-ray source 10, middle part according at the bottom of x-ray source 9, right side relative at the bottom of described left side, the X-ray beam sent for the ease of each x-ray source can form a thin fan beam, is respectively provided with collimator at each x-ray source position place.
Wherein, according to visual angle module, on the left of defining, visual angle V1 is shone at the end at and the composition end, left side corresponding with described L-type the first detector 4 according to x-ray source 9 at the bottom of described left side；According to visual angle module, on the right side of defining, visual angle V2 is shone at the end at and the composition end, right side corresponding with described L-type the second detector 3 according to x-ray source 10 at the bottom of described right side；According to visual angle module, in the middle part of defining, visual angle V3 is shone at the end at and the composition end, middle part corresponding with described U-shaped 3rd detector 1 according to x-ray source 2 at the bottom of described middle part.
nullAs shown in Figure 5，During application，First examined luggage 6 is placed on conveyer 11，After multi-view X ray safety inspection device of the present invention starts，Conveyer 11 is at the uniform velocity advanced，Examined luggage 6 is transported in transfer passage 5，Examined luggage 6 triggers the end, left side respectively according to x-ray source 9、The end, right side, is according to x-ray source 10、The end, middle part, is according to x-ray source 2，Each radiographic source successively sends X-ray beam，X-ray beam becomes thin fan beam the examined luggage 6 of transmission after being positioned at the collimator in radiographic source front，L-type the first detector 4、L-type the second detector 3 receives the corresponding deamplification transmitted through examined luggage 6 respectively and is transferred to system control and signal processing circuit unit 8 carries out analog digital conversion and signal correction processes with U-shaped 3rd detector 1，Thus forming corresponding visual angle V1、Visual angle V2、The projection image signal of visual angle V3，Then，The described visual angle V1 formed、Visual angle V2、The projection image signal of visual angle V3 is passed into integrated treatment computer 7，And in integrated treatment computer 7, carry out safety inspection and show inspection result.
Additionally, due to utilize double energy X-ray detection mode that inspected object can carry out the differentiation of material properties, therefore, in the present invention, described visual angle V1, visual angle V2, visual angle V3 all adopt single x-ray source, and launch the X ray of continuum；Described L-type the first detector 4, L-type the second detector 3 and U-shaped 3rd detector 1 overlap respectively are placed, namely described L-type the first detector 4, L-type the second detector 3 are, with U-shaped 3rd detector 1, the detector having mental retardation at the posterior two kinds of different Direction response of front high energy, and therefore it can respectively obtain mental retardation transmission signal and high energy transmission signal simultaneously；And then the object in examined luggage 6 is carried out material properties differentiation.
Shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 5, after examined luggage 6 is sent in transfer passage 5 by conveyer 11, it is examined luggage 6 and sequentially passes through the end, left side according to the end on the left of x-ray source 9 and the formation of L-type the first detector 4 according to V1 multi-view image by the distribution form of radiographic source Yu detector；The end, right side, defines the end, right side according to V2 multi-view image according to x-ray source 10 and L-type the second detector 3；The end, middle part, forms the end, middle part according to V3 multi-view image according to x-ray source 2 with U-shaped 3rd detector 1, and described V1 multi-view image, V2 multi-view image, V3 multi-view image are passed in integrated treatment computer 7 and carry out safety inspection, and export final inspection result.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in scope disclosed by the invention; the change that can readily occur in or replacement, all should be encompassed in the protection domain of the claims in the present invention.
Claims (5)
1. a multi-view X ray safety inspection device, it is characterised in that adopt 3 visual angle layout structures；The corresponding radiographic source at described 3 visual angles is respectively positioned on the lower section of device transfer passage, and described 3 visual angles lay respectively at the left side below transfer passage, middle part, position, 3, right side；Described 3 visual angles are made up of 3 groups of x-ray sources and detector, often group x-ray source and detector are called a probe unit, wherein, described probe unit is be installed at the bottom of the left side below transfer passage to shine at the bottom of visual angle module and middle part according to visual angle module according to visual angle module, side, right side；The end, left side is included according to x-ray source and the first detector according to visual angle module at the bottom of described left side；The end, right side is included according to x-ray source and the second detector according to visual angle module at the bottom of described right side；The end, middle part is included according to x-ray source and the 3rd detector according to visual angle module at the bottom of described middle part.
2. a kind of multi-view X ray safety inspection device according to claim 1, it is characterized in that, at the bottom of described left side, be provided with, according to x-ray source position place, the collimator that X-ray beam is formed thin fan beam respectively according to shining at the bottom of x-ray source, right side at the bottom of x-ray source and middle part.
3. a kind of multi-view X ray safety inspection device according to claim 1, it is characterized in that, also include system control and signal processing circuit unit and system control and signal processing circuit unit carries out data transmission integrated treatment computer, conveyer and transfer passage.
4. a kind of multi-view X ray safety inspection device according to claim 1, it is characterised in that described first detector, the second detector all adopt L-type detector.
5. a kind of multi-view X ray safety inspection device according to claim 1, it is characterised in that described 3rd detector adopts U-shaped detector.
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Cited By (5)
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| CN106841256A (en) * | 2017-02-17 | 2017-06-13 | 清华大学 | Various visual angles back scattering inspection system and various visual angles back scattering inspection method |
| CN107479103A (en) * | 2017-09-19 | 2017-12-15 | 北京君和信达科技有限公司 | Radiation checking system |
| CN111735735A (en) * | 2020-06-11 | 2020-10-02 | 山东滨州烟草有限公司 | Intelligent cigarette package nondestructive identification method and identifier |
| CN111856605A (en) * | 2020-07-31 | 2020-10-30 | 李国军 | Multi-view vertical base-illumination X-ray security inspection machine |
| CN111856604A (en) * | 2020-07-31 | 2020-10-30 | 李国军 | Gate type oblique angle bottom lighting X-ray machine |
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| CN111856604A (en) * | 2020-07-31 | 2020-10-30 | 李国军 | Gate type oblique angle bottom lighting X-ray machine |
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Application publication date: 20160720 |