CN101509880A - Safety check system of manifold effect detection fusing technology applying X ray - Google Patents
Safety check system of manifold effect detection fusing technology applying X ray Download PDFInfo
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- CN101509880A CN101509880A CNA2009100806765A CN200910080676A CN101509880A CN 101509880 A CN101509880 A CN 101509880A CN A2009100806765 A CNA2009100806765 A CN A2009100806765A CN 200910080676 A CN200910080676 A CN 200910080676A CN 101509880 A CN101509880 A CN 101509880A
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Abstract
The invention discloses a safety check system applying an X-ray multi-effect detection fusion technology which comprises an X-ray source, a collimator, a chopped-wave device, a dual-energy transmission detector, a forward scattering detector, a backward scattering detector, a signal processor, a computer system, a monitor and a conveying system, wherein the forward and the backward scattering detectors are positioned at two sides of the X-ray beam at a flying spot; the dual-energy transmission detector is positioned opposite the X-ray source; the forward scattering detector is positioned at one side of the dual-energy transmission detector; the backward scattering detector is positioned at one side of the X-ray source; and the dual-energy transmission detector, the forward scattering detector and the backward scattering detector are all connected with the signal processor which is connected with the computer system. The special algorithm can accurately and automatically identify target materials according to two characteristic quantities of effective atomic number Zeff and density of compositions of an obtained object to be checked, and give a red mark on an image, thus improving the detectivity and reducing the rate of false alarm.
Description
Technical field
The present invention relates to a kind of safety check system of applying X-ray, relate in particular to a kind of safety check system of applying X-ray manifold effect detection fusing technology.Belong to safety inspection radiant image technical field.
Background technology
Safety inspection is the important behave that guarantees that social stability and people's lives and properties are without prejudice, along with being becoming increasingly rampant of terrorist, threat to important department and facility such as airport, railway, public place of entertainment etc. is on the rise, in order to strengthen the safety inspection dynamics, safety check at different levels department constantly adopts new equipment and new technology.The safety inspection equipment that is widely used in important departments such as airport, customs, railway at present all is the X ray emissive devices, this kind equipment can only provide the transmission image of tested object, extract the effective atomic number information of tested object component whereby, but this kind equipment can not provide the information of the relevant density of tested object component.Though this kind equipment can effective recognition organism or inorganics, can not identify explosive and drugs from organism reliably, more can not survey the sheet dangerous material.Therefore, develop a kind of effective atomic number that can detect tested object and can detect wherein density information again, the safety inspection equipment that can also survey the dangerous device of sheet simultaneously is very necessary.
Summary of the invention
The objective of the invention is to obtain tested object component density information, and the deficiency that can not survey laminar dangerous material, a kind of safety check system of applying X-ray manifold effect detection fusing technology is provided in order to overcome existing equipment.
The safety check system of a kind of applying X-ray manifold effect detection fusing technology of the present invention is achieved through the following technical solutions:
A kind of safety check system of applying X-ray manifold effect detection fusing technology, comprise x-ray source, collimating apparatus, the copped wave device, the dual intensity transmission detectors, scattering detector, signal processor, computer system, two displays and induction system, described x-ray source is connected with collimating apparatus, x-ray source is launched conical X-ray beam, collimating apparatus can be collimated into the thin slice fan-shaped x-ray beam with conical X-ray beam, described copped wave device is positioned at the collimating apparatus front end, the pencil X ray flying spot that the copped wave device is modulated into the thin slice fan-shaped x-ray beam from the bottom to top or from top to bottom moves, the angle of the edge of a knife plate on the copped wave device can change with the shooting angle of X-ray beam, place tested object above the described induction system, pencil X ray flying spot and tested object interact, make the X ray of tested object scattering by preceding scattering detector, the backward scattering detector receives, described dual intensity transmission detectors, two preceding scattering detectors, scattering detector all is connected with signal processor after two, described signal processor is connected with computer system, signal processor is finished the pre-service of view data, A/D conversion and digital signal correction, described computer system connects two color monitors, two color monitors are respectively applied for dual energy transmission image and the dispersion image that spool shows tested object, and the tailor-made algorithm of computer system extracts the effective atomic number and the density feature value of tested object component.
And described dual intensity transmission detectors comprises high energy transmission detectors and low energy transmission detectors, and high low energy separation filter is set between described high energy transmission detectors and the low energy transmission detectors.
And, all comprise photomultiplier and scintillation crystal at least in scattering detector, backward scattering detector, high energy transmission detectors, the low energy transmission detectors before described, scintillation crystal converts the strength signal of X ray to light signal, and photomultiplier converts light signal to current signal.
And described preceding scattering detector, backward scattering detector, high energy transmission detectors, low energy transmission detectors are surrounded by metal case, and visible light and leakage ray are had good shielding action.
And described signal processor comprises scattered signal preamplifier, transmission signal preamplifier, scattered signal processor, transmission signal processor, system controller.
And, described two backward scattering detectors are symmetricly set on through the pencil X ray flying spot both sides after the described copped wave device modulates, described two preceding scattering detectors are symmetrical arranged the both sides of dual intensity transmission detectors, and two backward scattering detectors are symmetrical arranged x-ray source one side.
And described scintillation crystal is silicic acid lutetium, one of Zhe Suan , Dianization Cesium.
The safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention has following beneficial effect with respect to prior art:
1, the safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention can be surveyed the effective atomic number Z of tested object component simultaneously
EffAnd density information, thereby improved the detectivity of system, reduced rate of false alarm.
2, the safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention can highlight the material of being made up of low-Z element, and the material that contains a large amount of carbon, hydrogen, nitrogen, oxygen, particularly explosive and drugs.Remedy traditional X-ray transmission of radiation equipment and can not survey the defective of laminar dangerous material.
3, the safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention can carry out the automatic detection of dangerous material automatically, as explosive and drugs, and provides tangible sign.
4, the safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention adopts the spot scan principle, and the single of system checks that dosage is low especially, has only 1/10th of traditional X-ray transmission of radiation checkout facility.
5, the safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention is easy to operate, only tested object need be placed on above the induction system, can carry out the X-ray scanning inspection one by one to tested object by induction system.
6, the present invention can be widely used in the safety check of important departments such as airport, railway station, frontier defense port.
Description of drawings
Fig. 1 is the synoptic diagram of safety check system of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention;
Fig. 2 is the safety check system 2 dimension material identification planimetric maps of the manifold effect detection fusing technology of a kind of applying X-ray of the present invention.
Embodiment
For can being known, one of ordinary skill in the art understands technical scheme of the present invention, existing in conjunction with the accompanying drawings to the further explanation at large of the present invention's do:
The safety check system of a kind of applying X-ray manifold effect detection fusing technology of the present invention, as shown in Figure 1, comprise x-ray source 1, collimating apparatus 2 and copped wave device 3, dual intensity transmission detectors 10, two preceding scattering detectors 5, two backward scattering detectors 4, signal processor 8, computer system 9, two color monitors 11 and induction system 12, x-ray source 1 is connected with collimating apparatus 2, copped wave device 3 is positioned at the front end of collimating apparatus 2, collimating apparatus 2 is collimated into fan-shaped x-ray beam with the conical X-ray beam of x-ray source emission, by means of copped wave device 3, fan-shaped x-ray beam is modulated into a pencil X ray flying spot 15, induction system 12 is to be used to transmit the scanography that tested object 14 is accepted a pencil X ray flying spot 15, and tested object 14 is to be placed on the conveyor belt surface of induction system.When the tested object 14 of a pencil X ray flying spot 15 scanning, the X ray of tested object 14 scatterings is absorbed by two preceding scattering detectors 5 and two backward scattering detectors 4, the ray that passes tested object 14 is absorbed by dual intensity transmission detectors 10, the preceding scattering detector of dual intensity transmission detectors 10, two 5, two backward scattering detectors 4 all are connected with signal processor 8, signal processor 8 is connected with computer system 9, and computer system 9 connects two color monitors 11.
Further, dual intensity transmission detectors 10 comprises high energy transmission detectors 7 and low energy transmission detectors 6, and high low energy separation filter 13 is set between high energy transmission detectors 7 and the low energy transmission detectors 6.
Further, all comprise photomultiplier and scintillation crystal at least in two preceding scattering detectors 5, two backward scattering detectors 4, high energy transmission detectors 7, the low energy transmission detectors 6.
Further, two backward scattering detectors 4, two preceding scattering detectors 5, high energy transmission detectors 7, low energy transmission detectors 6 surround by metal case.
Further, signal processor 8 comprises scattered signal preamplifier, transmission signal preamplifier, scattered signal processor, transmission signal processor, system controller.
Further, two backward scattering detectors 4 are symmetricly set on through pencil X ray flying spot 15 both sides, x-ray source 1 the same side after 3 modulation of copped wave device, and two preceding scattering detectors 5 are symmetricly set on the both sides of dual intensity transmission detectors.
Further, scintillation crystal is silicic acid lutetium, one of Zhe Suan , Dianization Cesium.
Embodiment:
As shown in Figure 1, a kind of safety check system of applying X-ray manifold effect detection fusing technology, comprise x-ray source 1, collimating apparatus 2 and copped wave device 3, dual intensity transmission detectors 10, two preceding scattering detectors 5, two backward scattering detectors 4, signal processor 8, computer system 9, two color monitors 11 and induction system 12, the conical X-ray beam of x-ray source 1 emission, collimating apparatus 2 is collimated into the thin slice fan-shaped x-ray beam with conical X-ray beam, the pencil X ray flying spot 15 that copped wave device 3 is modulated into the thin slice fan-shaped x-ray beam from the bottom to top or from top to bottom moves, the angle of the edge of a knife plate of copped wave device 3 changes with the angle of X-ray beam; Pencil X ray flying spot 15 interacts with tested object 14 on the induction system 12, the X ray of tested object 14 scatterings is by two backward scattering detectors 4, two preceding scattering detectors 5 receive, two preceding scattering detectors 5 and two backward scattering detectors 4 are made up of photomultiplier and scintillation crystal, scintillation crystal is the silicic acid lutetium, bismuth germanium oxide, one of cesium iodide, two backward scattering detectors 4, two preceding scattering detector 5 outsides are provided with metal case, thereby to visible light with reveal ray good shielding is arranged, two backward scattering detectors 4, two preceding scattering detectors 5 guarantee the high s/n ratio and the short persistence of output signal, and the scattered ray of the tested object 14 of reception as much as possible; The X ray that passes tested object 14 is received by dual intensity transmission detectors 10, and high low energy separation filter 13 with the low energy of X ray, high power spectrum peak has separately improved effective atomic number Z
EffDetection accuracy.Dual intensity transmission detectors 10 is made up of photomultiplier and scintillation crystal, the outside is provided with metal case, visible light and leakage ray there is good shielding, scintillation crystal is the silicic acid lutetium, bismuth germanium oxide, one of cesium iodide, low energy transmission detectors 6, high energy transmission detectors 7 absorbs the X ray of different power spectrums, guarantee the high s/n ratio and the short persistence of output signal, signal processor 8 is handled respectively from two backward scattering detectors 4, two preceding scattering detectors 5, the simulating signal of high energy transmission detectors 7 and 6 outputs of low energy transmission detectors, and the A/D that finishes signal changes, signal after the processing is transferred to computer system 9, computer system 9 is finished the collection to image information, handle, show and storage, computer system 9 is connected with two color monitors 11, spool shows the dual-energy transmission images and the dispersion image of tested object 14 respectively, and computer system 9 tailor-made algorithms extract the effective atomic number Z of tested object 14 components
EffWith the density feature value, realized the purpose of explosive detection and drugs.
As shown in Figure 2, the system-specific algorithm comes the recognition objective material according to the position that the effective atomic number and the density feature value of the tested object component that detected drops on the identification plane.Traditional X ray transmissive system can only be come the recognition objective material according to the effective atomic number of tested object component and high energy or low energy signal gray-scale value, thus, the detectivity of the safety check system of a kind of applying X-ray manifold effect detection fusing technology of the present invention will be much higher than traditional X ray transmissive system, and rate of failing to report is far below traditional X ray transmissive system.The present invention not only is confined to the foregoing description, and is every in any conspicuous change of being done under the prerequisite of inventive concept, all will constitute right of the present invention is invaded.
Claims (7)
1, a kind of safety check system of applying X-ray manifold effect detection fusing technology, comprise x-ray source (1), collimating apparatus (2) and copped wave device (3), dual intensity transmission detectors (10), two preceding scattering detectors (5), two backward scattering detectors (4) signal processors (8), computer system (9), two color monitors (11) and induction system (12), it is characterized in that, described x-ray source (1) is connected with collimating apparatus (2), described copped wave device (3) is positioned at the front end of collimating apparatus (2), described collimating apparatus (2) is used for the conical X-ray beam of x-ray source (1) emission is collimated into fan-shaped x-ray beam, and fan-shaped x-ray beam is modulated into a pencil X ray flying spot (15) by means of copped wave device (3), described induction system (12) is used to transmit the scanography that tested object (14) is accepted a pencil X ray flying spot (15), described tested object (14) is placed on the conveyor belt surface of induction system, the X ray of tested object (14) scattering absorbs by two preceding scattering detectors (5) and two backward scattering detectors (4), the X ray that passes tested object (14) absorbs by dual intensity transmission detectors (10), described dual intensity transmission detectors (10), two preceding scattering detectors (5), two backward scattering detectors (4) all are connected with signal processor (8), described signal processor (8) is connected with computer system (9), and described computer system (9) connects two color monitors (11).
2, the safety check system of a kind of applying X-ray manifold effect detection fusing technology according to claim 1, it is characterized in that, described dual intensity transmission detectors (10) comprises high energy transmission detectors (7) and low energy transmission detectors (6), between described high energy transmission detectors (7) and the low energy transmission detectors (6) high low energy separation filter (13) is set.
3, the safety check system of a kind of applying X-ray manifold effect detection fusing technology according to claim 2, it is characterized in that, all comprise photomultiplier and scintillation crystal at least in described preceding scattering detector (5), backward scattering detector (4), high energy transmission detectors (7), the low energy transmission detectors (6).
4, the safety check system of a kind of applying X-ray manifold effect detection fusing technology according to claim 1, it is characterized in that described preceding scattering detector (5), backward scattering detector (4), high energy transmission detectors (7), low energy transmission detectors (6) are surrounded by metal case.
5, the safety check system of a kind of applying X-ray manifold effect detection fusing technology according to claim 1, it is characterized in that, described two preceding scattering detectors (5) and two backward scattering detectors (4) are symmetricly set on through pencil X ray flying spot (15) both sides after described copped wave device (3) modulation, described two preceding scattering detectors (5) are positioned at dual intensity transmission detectors one side, and two backward scattering detectors (4) are positioned at x-ray source (1) one side.
6, the safety check system of a kind of applying X-ray manifold effect detection fusing technology according to claim 1, it is characterized in that described signal processor (8) comprises scattered signal preamplifier, transmission signal preamplifier, scattered signal processor, transmission signal processor, system controller.
7, the safety check system of a kind of applying X-ray manifold effect detection fusing technology according to claim 3 is characterized in that, described scintillation crystal is silicic acid lutetium, one of Zhe Suan , Dianization Cesium.
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| CN102393399A (en) * | 2011-08-24 | 2012-03-28 | 屈俊健 | Device and method for forming X-ray flying spot |
| CN102914555A (en) * | 2012-11-19 | 2013-02-06 | 四川大学 | Unisource X-ray transmission and compton scattering security check device in L-shaped structure |
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