CN103399026B - A kind of explosive comprehensive detection system based on x-ray fluorescence analysis technology and detection method - Google Patents
A kind of explosive comprehensive detection system based on x-ray fluorescence analysis technology and detection method Download PDFInfo
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- CN103399026B CN103399026B CN201310295024.XA CN201310295024A CN103399026B CN 103399026 B CN103399026 B CN 103399026B CN 201310295024 A CN201310295024 A CN 201310295024A CN 103399026 B CN103399026 B CN 103399026B
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Abstract
The present invention relates to a kind of explosive comprehensive detection system based on x-ray fluorescence analysis technology and detection method, the transfer passage that this system comprises detection closed box, pass through for article and computing machine and control system, the upper and lower of described transfer passage or both sides, at least one group of power spectrum probe assembly is installed, for detecting the element contamination in motion in transfer passage or static article.The present invention utilizes XRF analysis know-why to detect explosive etc., is applicable to the fields such as safety on line monitoring.
Description
Technical field:
The invention belongs to XRF analysis technical applications, be specifically related to a kind of new use for explosive thing comprehensive detection system adopting XRF (XRF) analytical technology, and use this system to carry out the method detected fast for the explosive in motion or in static bulky items.
Background technology:
X-ray fluorescence spectra analytical approach is as one of the indispensable method of material composition analysis; be widely used in the fields such as geology, metallurgy, building materials, petrochemical complex, semi-conductor industry, medical and health, environmental protection, be also material science, a kind of quick, accurate and economic multielement analysis method that life science, environmental science etc. generally adopt.
Existing Xray fluorescence spectrometer, usual design sample stage, measuring samples is placed on platform and detects, can only for the sample of small volume as electronic component, soil, sample ore, micro metal sample etc. detect, be difficult to be applied to volume larger, such as parcel, luggage etc., and the determination and analysis of Minor element in baroque article.
In existing luggage security check equipment inspection mode, be use x-ray imaging principle, the article of parcel, luggage scanned, according to delimitation and the definitions of color of different materials attribute, thus qualitative analysis is carried out to different article.But existing rays safety detection apparatus can not identify completely to special articles such as such as explosives, also need security staff rule of thumb principium identification and open bag check, this semi-artificial method of discrimination is very big for the possibility that the explosive that disguise is stronger is undetected, and both waste a large amount of manpowers, turn increase the danger of security staff.
Mark plastic explosive to mention in the pact " Montreal Convention " of detection in the International Civil Aviation Organization of nineteen nineties about note, in explosive, add mark material, make it to become detectivity.Based on above pact, if (and in explosive raw material) adds mark material in explosive, to the management and control of explosive (and explosive raw material), prevent terrorist from implementing illegal act significant.
Summary of the invention:
For the problems referred to above, fundamental purpose of the present invention is to provide a kind of explosive comprehensive detection system based on x-ray fluorescence analysis technology and detection method, larger and baroque luggage and article carry out imaging and spectroscopy detection to volume, some element-specific in article is automatically identified and carried out qualitative and quantitative analysis.
For achieving the above object, a kind of explosive comprehensive detection system based on XRF analysis technology provided by the present invention, the transfer passage comprise detection closed box, passing through for article and computing machine and control system, the upper and lower of described transfer passage or both sides, at least one group of power spectrum probe assembly is installed, for detecting the element contamination in motion in transfer passage or static article.
Described power spectrum probe assembly is two groups, is divided into power spectrum probe assembly and lower power spectrum probe assembly, and dislocation is respectively in above and below described transfer passage.
Described transfer passage comprises level and is arranged on two groups of belt feeders in described casing, two groups of belt feeder head and the tail are along holding, between have narrow and small gap, upper power spectrum probe assembly is positioned at belt feeder top, lower power spectrum probe assembly is positioned at belt feeder bottom, and the outlet of the X ray of lower power spectrum probe assembly is just to this gap, the detecting head of lower power spectrum probe assembly stretches into this gap.
Described power spectrum probe assembly comprises X-ray tube assembly, detector assembly and optical shutter component, and the X ray outlet of described X-ray tube assembly and the detecting head of detector assembly are all towards the space of transfer passage.
Described X-ray tube assembly comprises the annular seal space be made up of body, upper cover plate, expander and expander gland, is divided into two chambers, places high-tension terminal, place tube core in opposite side chamber in a side cavity in described annular seal space central authorities by central dividing plate; Described tube core is connected by electric wire with high-tension terminal; In the chamber placing described tube core, be provided with the protection chamber that X-ray-preventing is revealed, offer X ray outlet in the side in described protection chamber, optical shutter component described in described X ray outlet arranged outside; Described tube core is connected with the radiating block outside a chamber, and described expander and expander gland are arranged on described body.
Described optical shutter component comprises motor mount, motor, rotating disk, rolling bearing, bearing rotating shaft, web joint, guide plate and U-shaped stereotype with slotted hole, guide plate and U-shaped stereotype composition are integrally arranged on web joint, and guide plate is arranged in the guide groove on described body simultaneously; Rolling bearing one end is arranged on rotating disk by bearing rotating shaft, and the other end is arranged in the slotted hole of web joint.
Described body exports correspondence position with described X ray, and fluting is provided with optical filter, and described optical shutter component is between described X ray outlet and described optical filter.
Along throughput direction interval, three groups of correlation optoelectronic switches are installed in the both sides of described transfer passage, after described power spectrum probe assembly is at least arranged on second group of correlation optoelectronic switch.
One imaging system components is also set, is installed on the upper and lower of described transfer passage or both sides, for carrying out x-ray imaging to motion or static article in transfer passage; Described imaging system components comprises X-ray machine and L-type detector panel, is positioned at after being at least second group of optoelectronic switch, before or after being positioned at described power spectrum probe assembly.
The present invention also provides the explosive method for comprehensive detection based on x-ray fluorescence analysis technology in a kind of 1 safety check, utilizes described explosive comprehensive detection system, time before described imaging system components is positioned at described power spectrum probe assembly, comprises the steps:
1) tested article are positioned on transfer passage run;
2) make operating article by first group of correlation optoelectronic switch, described detector assembly is moved to suitable detection height and position by control system;
3) make tested article continue the arrival second group of correlation switch that move ahead, control system controls imaging system components work, sends x-ray image to external computer;
4) external computer identification x-ray image, when confirming without suspicious object, article directly pass through; When identification has a suspicious object, computing machine suspicious region in the picture adds that red collimation mark is known, and sends this information to control system;
5) optical shutter component of control system control power spectrum probe assembly opens optical gate, to the article suspicious region scanning on travelling belt, the XRF Signal transmissions of collection is carried out x-ray fluorescence analysis to external computer by power spectrum probe assembly, whether containing mark material, qualitative and quantitative analysis is carried out to suspicious object, obtains testing result.
Time before described imaging system components is positioned at described power spectrum probe assembly, comprise the following steps:
(1) tested article are positioned on transfer passage run;
(2) make operating article by first group of correlation optoelectronic switch, described detector assembly is moved to suitable detection height and position by control system;
(3) tested article are made to continue the arrival second group of correlation switch that move ahead, the optical shutter component that control system controls power spectrum probe assembly opens optical gate, article on travelling belt are scanned comprehensively, the XRF Signal transmissions of collection is carried out x-ray fluorescence analysis to external computer by power spectrum probe assembly, qualitative and quantitative analysis is carried out to the mark material in article, obtains testing result and export to computing machine;
(4) computing machine sends output signal to control system, and control system controls imaging system components work, obtains x-ray image and sends external computer to.
When explosive comprehensive detection system does not establish imaging system components, implement by step (1)-(3).
Adopt technique scheme, design of the present invention goes for bulk sample and detects, and the article that can be opposite in passage carry out omnibearing determination and analysis, and Measuring Time is short, and accuracy is high.Empirical tests, this X ray integrated security check system includes the rate of failing to report of 100g or more explosive within 0.5% to large scale row bag, to small size parcel, includes more than 15g explosive and all can detect.The present invention is to the detection particularly suitable in the fields such as safety check, online quality monitoring.
Accompanying drawing explanation
Fig. 1 is surface structure schematic diagram of the present invention;
Fig. 2 is conveying assembly part-structure schematic diagram in the present invention;
Fig. 3 is the inner each arrangement of components figure of the present invention (not containing cabinet shell);
Fig. 4 is probe assembly structural representation in power spectrum in the present invention;
Fig. 5 detects modular construction schematic diagram under power spectrum in the present invention;
Fig. 6 is the cut-open view of X-ray tube assembly in the present invention;
Fig. 7 is the axonometric drawing of X-ray tube assembly in the present invention;
Fig. 8 is the body axonometric drawing of X-ray tube assembly in the present invention;
Fig. 9 is the axonometric drawing of optical shutter component in the present invention;
Figure 10 is the axonometric drawing of middle slideway assembly of the present invention;
Figure 11 is each several part signal connection layout of the present invention.
Number in the figure: 10-box assembly, 20-conveying assembly, 30-imaging system components, probe assembly in 40-power spectrum, probe assembly under 50-power spectrum, 60-control system, 70-cooling system;
11-cabinet shell, 12-lower detector protective cover, 13,14,15-correlation optoelectronic switch, 16-relay indicating light, 17-fan, 18-roller;
21,22-belt feeder, 23-transfer passage, 24-plumbous rubber curtain;
31-X-ray machine, 32-L-type high precision detector array plate;
41-X-ray tube assembly, 42-detector assembly, 43-optical shutter component, 44-slide assemblies, 45-high-voltage power supply, 46-high-voltage suppling power, 51-erecting frame;
411-body, 412-upper cover plate, 413-expander, 414-expander gland, 415-central dividing plate, 416-tube core, 417-radiating block, 418-high-tension terminal, 419-lead lining;
410a-guide plate, 410b-U-shaped stereotype, 411a-U-shaped guide groove, 411b-guide groove, 412c-lining with lead, 415a-sheet lead, 415b-cable tube, 416a-tube core insulating cylinder, 418a-High-Voltage Insulation cylinder, 419a-X ray outlet;
42a-detector, 42b-detector fixed mount, 42c-detector protective sleeve.
431-motor mounting plate, 432-motor, 433-rotating disk, 434-rolling bearing, the rotating shaft of 435-bearing, 436-web joint, 410a-guide plate, and 410b-U-shaped stereotype.
441-motor, 442-driving gear, 443-driven gear, 444-synchronizing wheel, 445-Timing Belt, 446-erecting frame, 447-leading screw, 448-nut seat, 449-mount pad.
Embodiment
In order to describe technical scheme of the present invention in detail, showing with a preferred embodiment and coordinating accompanying drawing to be described as follows.
In a preferred embodiment, this detection system includes two groups of power spectrum probe assemblies and one group of image-forming assembly.
As shown in FIG. 1 to 3, detection system provided by the invention, to comprise in box assembly 10, conveying assembly 20, imaging system components 30, power spectrum the part such as probe assembly 50, control system 60, cooling system 70 under probe assembly 40, power spectrum, also comprise an external computer.Wherein:
Box assembly 10, the fixed mount (not showing in figure) comprising cabinet shell 11 and be placed in one, correlation optoelectronic switch 13, 14, 15 and some annexes, these annexes comprise the supply hub and data transmission hole (both do not show in FIG) being located at and cabinet shell 11 is installed, supply hub can external power supply work, data transmission hole can carry out the transmission between data and external computer), annex also comprises relay indicating light 16, fan 17 and roller 18 etc., whether relay indicating light 16 points out instrument to work, fan 17 is for heat radiation, the carrying that roller 18 is convenient to equipment is moved.
Fixed mount is fixed on the inside of cabinet shell 11, and for installation, fixing internal assembly, be the exploded view after removing casing shown in Fig. 2, wherein conveying assembly 20 depends on fixed mount and is fixed on casing.Conveying assembly 20 is included in two groups of belt feeders 21,22 that in the middle part of casing, level is installed, two groups of belt feeders 21,22 head and the tail are along to hold but independent of one another, there is between them the path channels of narrow and small gap as probe assembly under power spectrum 50, often organize belt feeder primarily of motor, motorized pulleys, belt, bend pulley, tuningout cylinder composition, belt feeder can in rotating under driven by motor; Respectively leave delivery port in the both sides, front and back of cabinet shell 11, one as import, one as outlet; The stem of belt feeder 21 is through import, and the afterbody of belt feeder 22 passes over outlet, forms transfer passage 23 with this.All be covered with pure stereotype around transfer passage 23, delivery port is installed plumbous rubber curtain 24, can effectively stop that ray leaks outside.
See Fig. 3, the seam crossing between the inner two groups of belt feeders 21 and 22 of box assembly 10 is equipped with protective cover 12, not damaged when article pass through for the protection of probe assembly under power spectrum 50; On the fixed mount of transfer passage 23 both sides, three groups of correlation optoelectronic switches 13,14,15 are equipped with at interval, can measure height and the position of testing sample; First group of optoelectronic switch 13 is responded to tested article and whether is entered box house and measure the height of tested article, and second and third group optoelectronic switch 14,15 measures the position that tested article arrive.
As shown in Figure 3, imaging system components 30 is that the X ray of existing maturation penetrates imaging technique (identical with existing luggage security check equipment), after being arranged on first group of optoelectronic switch 13 and second group of optoelectronic switch 14, it forms primarily of X-ray machine 31 and L-type detector panel 32.X-ray machine 31 is arranged on below belt feeder 21, for sending the fan-shaped X-ray face of needs.L-type high precision detector array plate 32 to be arranged on belt feeder 21 and to be positioned at directly over X-ray machine 31, and major function accepts the X ray signal penetrating tested article that X-ray machine 31 sends, and is transferred in external computer and carries out image procossing after carrying out conversion process.
The present embodiment arranges two groups of power spectrum probe assemblies, and to comprise in power spectrum probe assembly 50 under probe assembly 40 and power spectrum, dislocation is relatively arranged on the upper and lower both sides of transfer passage respectively, irradiates tested article for misplacing.The present invention arranges two belt feeders 21 and 22 especially, and probe assembly 40 is arranged on that relatively forward (it is front that the present invention defines the position that article first pass through in power spectrum, as in Fig. 3, the right side is front) the top of belt feeder 21, another group power spectrum probe assembly 50 to be arranged between two groups of belt feeders below gap and to make its X ray export 419a(see Fig. 6) just to this gap, its detector 42a(is see Fig. 5) stretch in gap.Arrange two groups of belt feeders also to consider for the light path design of probe assembly 50 under probe assembly in power spectrum 40 and power spectrum, the upper and lower that in power spectrum, under probe assembly 40 and power spectrum, probe assembly 50 lays respectively at transfer passage just can make both, and distance is as far as possible short up and down, construct shorter light path, be beneficial to increase fluorescence intensity, detect more accurate; If use a belt feeder, under power spectrum, detector assembly just must be positioned at below belt, and the impact due to thickness of belt can increase the detection difficulty surveying device assembly.
In power spectrum, probe assembly 40 is substantially the same with probe assembly under power spectrum 50 structure, for probe assembly in power spectrum 40, as shown in Figure 4, Figure 5, includes X-ray tube assembly 41, detector assembly 42, optical shutter component 43, high-voltage power supply 45 and 48V power supply 46.X-ray tube assembly 41 provides x-ray source, and detector assembly 42 is for receiving XRF, and optical shutter component 43 opens and closes according to need of work, and when optical gate is closed, XRF is blocked by optical gate completely, and detector assembly 42 cannot receive data; High-voltage power supply 45 is for providing Guan Liuguan to press for light pipe, and 48V power supply 46 is for providing power supply for high-voltage power supply 45.In addition, in power spectrum, probe assembly 40 also comprises slide assemblies 44(see Fig. 4), under power spectrum, probe assembly 50 also comprises erecting frame 51(see Fig. 5), all for power spectrum probe assembly is arranged on fixed mount, often organize the X-ray tube assembly 41 of power spectrum probe assembly, detector assembly 42, optical shutter component 43, high-voltage power supply 45 and 48V power supply 46 and all make integrated package and be arranged on corresponding slide assemblies 44 or erecting frame 51.
As shown in Figure 6 to 8, X-ray tube assembly 41 comprises the compositions such as a rectangle body 411, upper cover plate 412, expander 413, expander gland 414, central dividing plate 415, tube core 416, radiating block 417, high-tension terminal 418, lead lining 419 and optical gate 410.Wherein, form an annular seal space by body 411, upper cover plate 412, expander 413 and expander gland 414, annular seal space is divided into two chambers by central dividing plate 415, and high-tension terminal 418 is placed in side, and opposite side places tube core 416; Expander 413 and expander gland 414 are arranged in a circular hole bottom body 411.Expander is a rubber parts, and its effect is exactly make the cavity volume variation with temperature of light pipe and change, and prevents the heat expansion because of chamber inner high voltage insulating oil from being squeezed by tube core broken.
Tube core 416 links together by through the electric wire of cable tube 415b on tube core insulating cylinder 416a, High-Voltage Insulation cylinder 418a and central dividing plate 415 with high-tension terminal 418.High-tension terminal 418 is connected with high-voltage power supply 45 by high voltage cable.In the upper and lower and side of chamber of placing tube core 416, lead lining 419 is all housed, the lining with lead 412c on upper cover plate 412 forms and protects chamber together with the sheet lead 415a on central dividing plate, lead lining 419, for the radiation protection of tube core 416, leaks outside to prevent ray.Offer X ray outlet 419a in the side of lead lining 419 as required, can difformity be split into as required.
The X ray outlet 419a of optical tube assembly 41 and the detecting head of detector assembly 42, all towards transfer passage 23 space, make full use of the optimal detection region of detector, can all regions X ray signal in detection channels simultaneously.
In power spectrum in probe assembly 40, as shown in Figure 4, Figure 5, detector assembly 42 comprises detector 42a, detector fixed mount 42b, detector protective sleeve 42c.Detector 42a is main sniffer, uses existing detector, and its front end has a columned detecting head; Detector fixed mount 42b is in order to fixed detector 42a; The detecting head that detector protective sleeve 42c is placed on detector 42a is outer to protect detector probe not by external interference or collision.
Optical shutter component 43(is see Fig. 4 and Fig. 5) be contained in X-ray tube assembly 41 X ray outlet 419a outside body 411 on.As shown in Figure 9, optical shutter component 43 comprises motor mount 431, motor 432, rotating disk 433, rolling bearing 434, bearing rotating shaft 435, web joint 436, guide plate 410a and U-shaped stereotype 410b410b with slotted hole.Guide plate 410a and U-shaped stereotype 410b410b composition is integrally arranged on web joint 436, and guide plate 410a is arranged in the guide groove 411b on body 411 simultaneously; The inner ring of rolling bearing 434 is arranged on rotating disk 433 by bearing rotating shaft 435, and the outer ring of rolling bearing 434 is arranged in the slotted hole of web joint 436; Motor 432 drives rotating disk 433 to rotate, rolling bearing 434 moves in slotted hole, drive guide plate 410a and U-shaped stereotype 410b to move in guide groove 411b by web joint 436, U-shaped stereotype 410b moves up and down the object playing and block X ray outlet 419a simultaneously.
Further, offer a U-lag 411a exporting on the corresponding body in 419a position 411 with X ray, in U-lag 411a, optical filter is installed.The effect of optical filter is the interference that causes such as scattering background eliminating or weaken the target characteristic spectral line of interference analysis line, impurity lines, successive line, improves detection limits.U-shaped stereotype 410b slide anteroposterior (in Fig. 6, Fig. 7, direction is upper and lower) outside X ray outlet 419a and optical filter blocks ray.
Connect radiating block 417 in the outside of tube core 416, radiating block 417 is connected with heating radiator with water pump, cools target core.Tube core 416 and radiating block 417 are arranged on upper cover plate 412 respectively by bolt with high-tension terminal 418 after being bolted into and being integrated.
Slide assemblies 44 structure, as shown in Figure 10, comprises motor 441, driving gear 442, driven gear 443, synchronizing wheel 444, Timing Belt 445, erecting frame 446, leading screw 447, nut seat 448 and mount pad 449.Motor 441, driving gear 442, driven gear 443, synchronizing wheel 444, Timing Belt 445 leading screw 447 are all arranged on erecting frame 446, erecting frame 446 is arranged in frame again, sheathed nut seat 448 and mount pad 449, optical tube assembly 41 and detector assembly 42 on leading screw.Motor 441 makes leading screw 447 rotate by driving gear 442, driven gear 443, synchronizing wheel 444 and Timing Belt 445 simultaneously, and leading screw drives nut seat 448 and mount pad 449 to move up and down, thus drives probe assembly 40 in power spectrum to move up and down.
In the present embodiment, for probe assembly in power spectrum 40, detector assembly 42 and optical tube assembly 41 are assembled into and are integrally arranged on slide assemblies 44, according to the difference of tested article height, optical tube assembly and detector assembly can be moved up and down appropriate location according to case and bag height by slide assemblies.For probe assembly under power spectrum 50, detector assembly 42 and optical tube assembly 41 are assembled into and are integrally arranged on erecting frame 51, are fixed on the fixed mount of box assembly 10.
In the present invention, the electrical parts such as imaging system, high-voltage power supply, X-ray tube, detector, fan, optoelectronic switch, relay indicating light connect all in a usual manner.Control system 60 comprises general feedback module and control module, assembly connection in due form, wherein feedback module comprises feedback channel, for receive correlation optoelectronic switch 13,14,15 feed back signal data after be transferred to external computer, wherein control module comprises optical gate control channel, slide assemblies control channel and pilot lamp control channel, is respectively used to the Push And Release etc. controlling the Push And Release of optical shutter component 43, the movement of slide assemblies 44 and relay indicating light 16.The data line of each detector (detector assembly 42, L-type high precision detector array plate 32) pools together and is connected with external computer, directly controls by computing machine the spectral data that Push And Release and reception collect.See Figure 11.
Cooling system 70 comprises cooling fan, heating radiator and water pump etc., is taken away the heat of X-ray tube generation by the circulation of chilled water, and light pipe is in the safe temperature range of normal work.
In conveying assembly 20, imaging system components 30, power spectrum, under probe assembly 40, power spectrum, probe assembly 50, control system 60 and cooling system 70 are fixed in the cabinet shell 11 of box assembly 10 by (see Fig. 3) after above-mentioned introduction assembling again, then form the preferred forms of the X ray integrated security check system (see Fig. 1) of multidetector of the present invention and the design of many light pipes.
Utilize the detection method of the above system:
1) article to be measured are positioned on belt feeder 21, start belt feeder 21 and run;
2) operating article are by first group of correlation optoelectronic switch 13, this optoelectronic switch 13 detects the article height of admission passage, send detection signal to external computer, control system 60 controls slide assemblies 44 and X-ray tube assembly 41(is in optical gate closes state to be measured) and upper and lower two groups of detector assemblies 42 move to corresponding detection height position (effectively can increase measuring accuracy).
3) tested article continue to move ahead, arrive second group of correlation switch 14 position, transmit after this optoelectronic switch 14 detects item signal, control system 60 controls imaging system components 30 and opens X-ray machine 31, relay indicating light 16 lights, the fan-shaped X-ray that X-ray machine 31 produces is through the article on travelling belt, and L-type high precision detector array plate 32 receives the transmission X-ray signal after by tested article and sends external computer to and show with image format.
4) carry out scanning the x-ray image generated for imaging system components 30 pairs of article, when external computer identification is without suspicious object, article directly pass through; If identify when having a suspicious object, computing machine automatically (or operating personnel are manual) suspicious region in the picture adds that red collimation mark is known, and send this information to control system 60, the optical shutter component 43 being controlled probe assembly 50 under probe assembly 40 and power spectrum in power spectrum by control system 60 opens optical gate, and the simple X ray that X-ray tube assembly 41 produces becomes the beam of certain thickness and width through the suspicious object (emphasis detection has added the suspicious region of red frame) on travelling belt after mating plate after filtration; Detector assembly 42 receives the XRF that tested suspicious object reflects, the data collected are transferred to external computer and carry out x-ray fluorescence analysis, thus whether containing mark material, qualitative and quantitative analysis is carried out to suspicious object, obtain testing result.
5) when tested article are driven by the 3rd group of correlation optoelectronic switch 15 by belt feeder 22, this optoelectronic switch 15 sends a signal to control system 60, control system to control in power spectrum probe assembly 50 under probe assembly 40 and power spectrum optical shutter component 43 close, tested article, by the plumbous rubber curtain 24 of outlet, detect and terminate.
Detection example: detect for whether there is explosive in article.Article to be checked are placed on belt feeder, open system, external computer operation interface is clicked " starting to measure " button, article to be checked pass through belt feeder, end is measured after tens of second, display measurement result on external computer screen, comprises pictograph or sound (being divided into the classification such as " safety ", " alarm " and " resurveying ") prompting, also can show and quantitatively detect numerical value.The method detection speed is fast, and after tested, present system can detect the large scale row bag (size 550mm × 400mm × 300mm) of built-in 100g or more explosive, and rate of failing to report is within 0.5%; For small size parcel (size: 200mm × 200mm × 100mm), include more than 15g explosive and all can detect there is good effect for explosive detection.
Adopt the X ray comprehensive detection system of above-mentioned design, the channel size in this example is that 500mm × 310mm(can extend to 1000mm × 1000mm according to actual conditions), X-ray tube assembly has 4, and detector assembly has 6, enough scans use.
In addition, by aforementioned preferred forms, the present invention can also carry out following change:
Change one, omission imaging system components 30.Which directly scans with power spectrum probe assembly whole bag and detects, and is suitable for without the need to obtaining radioscopic image, directly for the situation of mark material qualitative and quantitative detection, for anti-explosion safety inspection field.
Change two, power spectrum probe assembly is arranged on imaging system components 30 before, after second group of optoelectronic switch 14.Which is suitable for first to mark material qualitative and quantitative detection, the situation of rear formation radioscopic image.
Change three, the present invention utilize XRF analysis know-why, only can install one group of power spectrum probe assembly, are arranged on passage or lower or side.
Change four, the present invention utilize XRF analysis know-why, can install power spectrum probe assembly more than two, are arranged on passage or lower or side.
As shown in the above description, the component of complexity is carried out the design of built-up pattern blocking by the present invention, is more convenient for installing and maintenance.In addition, in box assembly 10 and conveying assembly 20, imaging system components 30, power spectrum, the respective design of probe assembly 50 under probe assembly 40, power spectrum, makes present system can further expand the detection being applicable to bulky items.
Claims (13)
1. the explosive comprehensive detection system based on x-ray fluorescence analysis technology, the transfer passage comprise detection closed box, passing through for article and computing machine and control system, it is characterized in that: at upper and lower each installation one group of power spectrum probe assembly of described transfer passage, for detecting the element contamination in motion in transfer passage or static article;
Described power spectrum probe assembly is two groups, is divided into power spectrum probe assembly and lower power spectrum probe assembly, and dislocation is respectively in above and below described transfer passage;
Described transfer passage comprises level and is arranged on two groups of belt feeders in described casing, two groups of belt feeder head and the tail are along holding, between have narrow and small gap, upper power spectrum probe assembly is positioned at belt feeder top, lower power spectrum probe assembly is positioned at belt feeder bottom, and the outlet of the X ray of lower power spectrum probe assembly is just to this gap, the detecting head of lower power spectrum probe assembly stretches into this gap.
2. explosive comprehensive detection system according to claim 1, it is characterized in that: described power spectrum probe assembly comprises X-ray tube assembly, detector assembly and optical shutter component, the X ray outlet of described X-ray tube assembly and the detecting head of detector assembly are all towards the space of transfer passage.
3. explosive comprehensive detection system according to claim 2, it is characterized in that: described X-ray tube assembly comprises the annular seal space be made up of body, upper cover plate, expander and expander gland, two chambers are divided into by central dividing plate in described annular seal space central authorities, place high-tension terminal in one side cavity, in opposite side chamber, place tube core; Described tube core is connected by electric wire with high-tension terminal; In the chamber placing described tube core, be provided with the protection chamber that X-ray-preventing is revealed, offer X ray outlet in the side in described protection chamber, optical shutter component described in described X ray outlet arranged outside; Described tube core is connected with the radiating block outside a chamber, and described expander and expander gland are arranged on described body.
4. explosive comprehensive detection system according to claim 3, it is characterized in that: described optical shutter component comprises motor mount, motor, rotating disk, rolling bearing, bearing rotating shaft, web joint, guide plate and U-shaped stereotype with slotted hole, guide plate and U-shaped stereotype composition are integrally arranged on web joint, and guide plate is arranged in the guide groove on described body simultaneously; Rolling bearing one end is arranged on rotating disk by bearing rotating shaft, and the other end is arranged in the slotted hole of web joint.
5. the explosive comprehensive detection system according to claim 3 or 4, is characterized in that: on described body, export correspondence position with described X ray, and fluting is provided with optical filter, and described optical shutter component is between described X ray outlet and described optical filter.
6. according to the arbitrary described explosive comprehensive detection system of claim 2-4, it is characterized in that: along throughput direction interval, three groups of correlation optoelectronic switches are installed in the both sides of described transfer passage, after described power spectrum probe assembly is at least arranged on second group of correlation optoelectronic switch.
7. explosive comprehensive detection system according to claim 1, it is characterized in that: along throughput direction interval, three groups of correlation optoelectronic switches are installed in the both sides of described transfer passage, after described power spectrum probe assembly is at least arranged on second group of correlation optoelectronic switch.
8. explosive comprehensive detection system according to claim 5, it is characterized in that: along throughput direction interval, three groups of correlation optoelectronic switches are installed in the both sides of described transfer passage, after described power spectrum probe assembly is at least arranged on second group of correlation optoelectronic switch.
9. explosive comprehensive detection system according to claim 6, is characterized in that: also arrange an imaging system components, is installed on the upper and lower of described transfer passage or both sides, for carrying out x-ray imaging to motion or static article in transfer passage; Described imaging system components comprises X-ray machine and L-type detector panel, is positioned at after being at least second group of optoelectronic switch, before or after being positioned at described power spectrum probe assembly.
10. explosive comprehensive detection system according to claim 7, is characterized in that: also arrange an imaging system components, is installed on the upper and lower of described transfer passage or both sides, for carrying out x-ray imaging to motion or static article in transfer passage; Described imaging system components comprises X-ray machine and L-type detector panel, is positioned at after being at least second group of optoelectronic switch, before or after being positioned at described power spectrum probe assembly.
11. explosive comprehensive detection systems according to claim 8, is characterized in that: also arrange an imaging system components, are installed on the upper and lower of described transfer passage or both sides, for carrying out x-ray imaging to motion or static article in transfer passage; Described imaging system components comprises X-ray machine and L-type detector panel, is positioned at after being at least second group of optoelectronic switch, before or after being positioned at described power spectrum probe assembly.
Based on the explosive method for comprehensive detection of x-ray fluorescence analysis technology in 12. 1 kinds of safety checks, it is characterized in that: utilize explosive comprehensive detection system described in claim 9, and before described imaging system components is positioned at described power spectrum probe assembly, comprise the steps:
1) tested article are positioned on transfer passage run;
2) make operating article by first group of correlation optoelectronic switch, described detector assembly is moved to suitable detection height and position by control system;
3) make tested article continue the arrival second group of correlation switch that move ahead, control system controls imaging system components work, sends x-ray image to external computer;
4) external computer identification x-ray image, when confirming without suspicious object, article directly pass through; When identification has a suspicious object, computing machine suspicious region in the picture adds that red collimation mark is known, and sends this information to control system;
5) optical shutter component of control system control power spectrum probe assembly opens optical gate, to the article suspicious region scanning on travelling belt, the XRF Signal transmissions of collection is carried out x-ray fluorescence analysis to external computer by power spectrum probe assembly, whether containing mark material, qualitative and quantitative analysis is carried out to suspicious object, obtains testing result.
Based on the explosive method for comprehensive detection of x-ray fluorescence analysis technology in 13. 1 kinds of safety checks, it is characterized in that: utilize explosive comprehensive detection system described in claim 11, and before described imaging system components is positioned at described power spectrum probe assembly, comprise the steps:
1) tested article are positioned on transfer passage run;
2) make operating article by first group of correlation optoelectronic switch, described detector assembly is moved to suitable detection height and position by control system;
3) make tested article continue the arrival second group of correlation switch that move ahead, control system controls imaging system components work, sends x-ray image to external computer;
4), external computer identification x-ray image, when confirming without suspicious object, article directly pass through; When identification has a suspicious object, computing machine suspicious region in the picture adds that red collimation mark is known, and sends this information to control system;
5) optical shutter component of control system control power spectrum probe assembly opens optical gate, to the article suspicious region scanning on travelling belt, the XRF Signal transmissions of collection is carried out x-ray fluorescence analysis to external computer by power spectrum probe assembly, whether containing mark material, qualitative and quantitative analysis is carried out to suspicious object, obtains testing result.
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| CN106442593A (en) * | 2016-11-10 | 2017-02-22 | 中铝广西国盛稀土开发有限公司 | Rare earth product quality online monitoring instrument |
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| US5600700A (en) * | 1995-09-25 | 1997-02-04 | Vivid Technologies, Inc. | Detecting explosives or other contraband by employing transmitted and scattered X-rays |
| US7366282B2 (en) * | 2003-09-15 | 2008-04-29 | Rapiscan Security Products, Inc. | Methods and systems for rapid detection of concealed objects using fluorescence |
| US20060086901A1 (en) * | 2004-10-22 | 2006-04-27 | Price L S | Methods and apparatus for improving the reliability and accuracy of identifying, analyzing and authenticating objects, including chemicals, using multiple spectroscopic techniques |
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