CN101655465B - Dotted line composite scanning backscattered and stereo transmission imaging device - Google Patents
Dotted line composite scanning backscattered and stereo transmission imaging device Download PDFInfo
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- CN101655465B CN101655465B CN200910091571XA CN200910091571A CN101655465B CN 101655465 B CN101655465 B CN 101655465B CN 200910091571X A CN200910091571X A CN 200910091571XA CN 200910091571 A CN200910091571 A CN 200910091571A CN 101655465 B CN101655465 B CN 101655465B
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Abstract
The invention relates to a dotted line composite scanning backscattered and stereo transmission imaging device, belonging to the technical field of radiation imaging security detection equipment. In the device, a dotted line composite scanning generator is sheathed on a radiation source or at the front of the radiation source; a rear or front slit collimator collimates a ray emitted by the dotted line composite scanning generator in a sector scanning surface; the rear or front slit collimator and a backscattered detector are arranged at one side of the radiation source of an detected object, and a line array transmission detector is arranged at the other side thereof; a backscattered channel synchronous switch and a backscattered signal processor are connected between the backscattered detector and an image computer; and a transmission channel synchronous switch and a transmission signal processor are connected between the line array transmission detector and the image computer. In the imaging device, only one radiation source and one scanning generator and primary detection are adopted to obtain a backscattered image and a fine transmission image for highlighting lightweight objects, wherein, the transmission image with fine image quality can be also a stereo image.
Description
Technical field
The present invention relates to a kind of dotted line composite scanning backscattered and stereo transmission imaging device, belong to radiant image security detection equipment technical field.
Background technology
Safety check department generally uses X ray transmission imaging check-up case and bag and vehicle at present, and high z number materials such as copper iron are absorbed greatly, comes to light easily; Low atomic number such as drugs, explosive material absorbing is very little, in image, is difficult for finding omission easily.X ray or the gamma ray compton backscattering in object, more responsive to the light materials of low atomic number, can use lightweight object such as highlighting drugs and explosive; In recent years also be used for the safety check imaging.But a little less than the backward scattering very of object, the backward scattering ray of a certain point of seized object need adopt large area detector to collect.So actual back scattering imaging device all adopts pencilbeam scanning object bit by bit, receive by large-area detector, as shown in Figure 1.The 1st, radiation source, the 13rd, preposition slit collimator, the 2nd, chopper wheel flying-spot scanner generator, the pencilbeam that swings up and down scanning that is produced is injected seized object 5, and the backward scattering ray of object is collected by large area detector 4.Present back scattering imaging device also often adopts a detector 6 to collect the transmitted ray in dead ahead, so that obtain transmission image simultaneously, with the backscatter images contrast processing.
In order to produce the beam of spot scan, United States Patent (USP) (Re.28,544) has designed above-mentioned chopper wheel flying spot scanning device.Produce the pencilbeam of scanning up and down by the slit of pre-collimator and the chopper wheel slit of rotation.U.S. Pat 7,099,434B2 has designed concentric flywheel flying spot scanning device, and flywheel rotates with the X-ray pipe is concentric, has on the flywheel to produce the spot scan beam along with the flywheel rotation through the tubulose collimating apparatus of ray.Chinese patent (ZL 2,008 2 0079391.0) has designed rotating cylinder picture-dot interlacing device.Fan beam is aimed at the rotating shaft of a rotating cylinder; Discrete Distribution is arranged on the rotating cylinder but cover the paired aperture of various angles; Rotating cylinder forwards different angles to and has only a kind of aperture of the elevation angle can penetrate beam; Produce picture-dot interlacing during the rotating cylinder rotation, arrange beam according to the regularity of distribution in rotating cylinder aperture, can form a row image by computing machine.But the spatial resolution of all these back scattering imaging devices is not high.This is that large area detector can receive the ray of repeatedly scattering again simultaneously, so the spatial resolution of the backscatter images of spot scan and transmission image is not high because a little less than the backward scattering, beam can not be too thin.
On the principle, can adopt fine and closely woven linear array detector to survey transmission image, improve spatial resolution in spot scan back scattering imaging system dead ahead; But because the back scattering imaging system uses is spot scan, more than one percent the when time that stops in each unit of linear array detector has only line sweep, and probe unit is because of receiving the not enough signal to noise ratio (S/N ratio) that significantly reduces image of signal.
So, under existing technical conditions, during actual the use usually the utility appliance of back scattering imaging device as traditional line sweep transmission imaging device.Two complete equipment line productiones.The transmission scan imaging device provides meticulous transmission image, and back scattering imaging equipment does not then provide spatial resolution high but can highlight the backscatter images of lightweight object (explosive, drugs etc.).This combination has improved the detection performance, but detection cost and shared place are multiplied.
Summary of the invention
The objective of the invention is to propose a kind of dotted line composite scanning backscattered and stereo transmission imaging device, to overcome the deficiency of prior art, with an X-ray machine, a cover scanner and a sets of data are obtained equipment, obtain backscatter images and meticulous transmission image simultaneously.
Backward scattering of dotted line composite scanning formula and stereo transmission imaging device that the present invention proposes comprise radiation source, dotted line composite scanning generator, postposition or preposition slit collimator, line array transmission detector, transmission channels synchro switch, transmission signal processor, backward scattering detector, backscattered channel synchronous switch, backscattered signal processor, image computer and stereo-picture viewer; Described dotted line composite scanning generator is sleeved on the radiation source or before placing radiation source; Described postposition or preposition slit collimator with the ray collimation of dotted line composite scanning generator outgoing in sector display face; Said postposition or preposition slit collimator and backward scattering detector place radiation source one side of object to be detected, and described line array transmission detector places the opposite side of object to be detected; Described backscattered channel synchronous switch and backscattered signal processor are connected in turn between backward scattering detector and the image computer through cable, and described transmission channels synchro switch and transmission signal processor are connected in turn between line array transmission detector and the image computer through cable.
Dotted line composite scanning generator in the above-mentioned imaging device can have four kinds of different structural forms, wherein:
The-kind of version is the open circles tray type structure of three layers of left, center, right; The middle level radially has a plurality of apertures; Left and right two-layer forward surface is the conical surface, and the angle of two conical surfaces is two subtense angles that testee carried out three-dimensional imaging, radially respectively has a plurality of slits on the conical surface; The outside of hollow disk is provided with the alpha ray shield box, and the alpha ray shield box is provided with the ray outlet.
Second kind of version is hollow core structure; Barrel upper edge circumference has a plurality of apertures over against the center of circle and a plurality of; Have a plurality of R-joinings entad in the both sides of aperture; Article two, the angle between the R-joining is two subtense angles that testee carried out three-dimensional imaging in opposite directions, and the outside of cylinder is provided with the alpha ray shield box, and the alpha ray shield box is provided with the ray outlet.
The third version is the hollow tray type structure of individual layer, Pan Bi upper edge circumference have a plurality of over against the center of circle, alternatively distributed aperture and slit, the outside of disk is provided with the alpha ray shield box, the alpha ray shield box is provided with the ray outlet.
The 4th kind of version is the unitized construction of preposition slit collimator and chopper wheel, has radial slit and fan-shaped window on the chopper wheel, and radial slit and fan-shaped window space alternately distribute.
Dotted line composite scanning backscattered and the stereo transmission imaging device that the present invention proposes; Its advantage is: only with a radiation source; One cover scanning generator; Volume is close with at present single X ray transmission imaging device or back scattering imaging device, and one-time detection just can obtain to highlight the backscatter images of lightweight object and meticulous transmission image.The image of the quality of transmission image and traditional X ray transmission imaging device is meticulous equally; Transmission image can also be a stereo-picture.
Description of drawings
Fig. 1 is existing spot scan back scattering imaging system architecture synoptic diagram.
Fig. 2 is the structural representation of the dotted line composite scanning backscattered and stereo transmission imaging device that proposes of the present invention.
Fig. 3 is the dotted line composite scanning principle schematic of apparatus of the present invention.
Fig. 4 is first kind of version of the dotted line composite scanning generator in the imaging device of the present invention.
Fig. 5 is the rearmounted slit collimator structural representation of imaging device dotted line compound scan generator of the present invention.
Fig. 6 is the dotted line composite scanning generator version that is used for backward scattering and plane transmission imaging.
Fig. 7 is other a kind of version of dotted line composite scanning generator.
Fig. 8 is the structural representation of an embodiment of imaging device of the present invention.
Among Fig. 1-Fig. 8, the 1st, radiation source, the 2nd, dotted line composite scanning generator, the 3rd, rearmounted slit collimator; The 4th, a pair of backward scattering detector, the 5th, seized object, the 6th, line array transmission detector, the 7th, backscattered channel synchronous switch; The 8th, backscattered signal processor, the 9th, transmission channels synchro switch, the 10th, transmission signal processor, the 11st, image computer; The 12nd, stereo-picture viewer, the 13rd, preposition slit collimator, the 14th, dotted line composite scanning chopper wheel, the 15th, scanning car; The 16th, transmission detectors holding bay, the 17th, scan arm turntable, the 18th, scan arm expansion link.
Embodiment
Backward scattering of dotted line composite scanning formula and stereo transmission imaging device that the present invention proposes; Its structure is as shown in Figure 2, comprises radiation source 1, dotted line composite scanning generator 2, rearmounted or preposition slit collimator 3 and 13, line array transmission detector 6, transmission channels synchro switch 7, transmission signal processor 10, backward scattering detector 4, backscattered channel synchronous switch 9, backscattered signal processor 8, image computer 11 and stereo-picture viewer 12.Dotted line composite scanning generator 2 is sleeved on the radiation source 1 or places the front of radiation source 1.Rearmounted or preposition slit collimator with the ray collimation of dotted line composite scanning generator 2 outgoing in sector display face.Rearmounted or preposition slit collimator and backward scattering detector 4 place radiation source one side of object to be detected 5, and line array transmission detector 6 places the opposite side of object to be detected 15.Backscattered channel synchronous switch 7 and backscattered signal processor 8 are connected in turn between backward scattering detector 4 and the image computer 11 through cable.Transmission channels synchro switch 9 and transmission signal processor 10 are connected in turn between line array transmission detector 6 and the image computer 11 through cable.
In the imaging device of the present invention, the dotted line composite scanning generator is sleeved on the radiation source or before placing radiation source; The dotted line composite scanning generator alternately produces spot scan beam and a pair of line sweep beam, in three fan-shaped plans, scans seized object by rearmounted slit collimator collimation.The ray that backward scattering is returned during spot scan is received by the backward scattering detector with radiation source the same side, by backscattered channel synchronous switch and backscattered signal processor the object information of each analyzing spot is imported computing machine, forms a row backscatter images; Transmitted ray during line sweep is received by the line array transmission detector at the object opposite side, by transmission channels synchro switch and transmission signal processor the object information in the sweep trace is imported computing machine, forms a row transmission and penetrates image; Seized object can obtain the backscatter images and the transmission image of view picture through beam.
In the above-mentioned imaging device, described dotted line composite scanning generator can be the three layers of open circles tray type structure in left, center, right, and the middle level radially has a plurality of apertures, the spot scan beam of output back scattering imaging.Left and right two-layer forward surface is the conical surface, and the angle theta of two conical surfaces radially respectively has a plurality of slits for testee being carried out two subtense angles of three-dimensional imaging on the conical surface, a pair of line sweep beam of output stereo transmission imaging.The outside of hollow disk is provided with the alpha ray shield box, and the alpha ray shield box is provided with the ray outlet, the scanning subtended angle of the subtended angle decision ray of ray outlet.
Be weight reduction, volume and power consumption, in above-mentioned imaging device, can the hollow garden dish external diameter of described dotted line composite scanning generator be reduced near internal diameter, make open circles cartridge type dotted line composite scanning generator.But the ray captured alignment is short, influences the spatial resolution of image, is suitable for low-cost product.
In the above-mentioned imaging device, described three layers of dotted line composite scanning generator are when θ is zero at the angle, and three-decker is merged into one deck, is the dotted line composite scanning generator of backward scattering and plane transmission imaging.Pan Bi upper edge circumference have a plurality of over against the center of circle, alternatively distributed aperture and slit, the outside of disk is provided with the alpha ray shield box, the alpha ray shield box is provided with the ray outlet.
Backward scattering of dotted line composite scanning formula and stereo transmission imaging device that the present invention proposes both can be used for the channel-type safe examination system, also can be used for vehicular and portable security inspection imaging system.Specify as follows below in conjunction with accompanying drawing and embodiment:
As shown in Figure 2; This device comprises radiation source 1, dotted line composite scanning generator 2, rearmounted slit collimator 3, backward scattering detector 4, seized object 5, line array transmission detector 6, backscattered channel synchronous switch 7, backscattered signal processor 8, transmission channels synchro switch 9, transmission signal processor 10, image computer 11 and stereo-picture viewer 12; Described dotted line composite scanning generator is sleeved on the radiation source, with one heart rotation; The ray collimation that described rearmounted slit collimator 3 penetrates the dotted line composite scanning generator and will provide the control signal of synchro switch when each slit will have ray output in three fan-shaped plans.Pencilbeam during spot scan (slightly black arrow) the seized object 5 caused backward scattering rays (dotted arrow) of scanning connect 4 by the backward scattering detector with radiation source the same side and receive; Through stube cable the object information of each analyzing spot is imported computing machine 11 by backscattered channel synchronous switch 7 and backscattered signal processor 8, form a row backscatter images; During line sweep two bundle transmitted ray (the black fan beam that forms an angle) is passed object 5; A pair of line array transmission detector 6 by at the object opposite side receives; Through stube cable the object information in the sweep trace is imported computing machine 11 by transmission channels synchro switch 9 and transmission signal processor 10, two visual angles are respectively formed a row transmission image; Seized object 5 can obtain the backscatter images and the stereo transmission image of view picture through beam.The stereo transmission image that computing machine shows can be through the observation of stereo-picture observer.Backscatter images can show separately or be fused on the transmission image.Above-mentioned radiation source, line array transmission detector, backward scattering detector, backscattered signal processor can adopt the same parts of the x-ray imaging product that is widely used in safety check at present.
The demonstration of stereo-picture can be used multiple existing method (China's patent 200920107519.4): on same screen, alternately show left-eye image and eye image, observe with the liquid crystal shutter glasses; The dark purple binary channels image that the while display process is crossed on same screen is observed with the dark purple anaglyph spectacles; Importing virtual implementing helmet to left-eye image and eye image respectively observes; Or output to display with deflection grating, wear a pair of spectacles just can not observed.
Are shown in the spot scan cycle of dotted line composite scanning generator and line period Fig. 3 respectively.Among Fig. 3,1 is radiation source, and 2 is the dotted line composite scanning generator, and 3 is rearmounted slit collimator, and 4 are the backward scattering detector, and 5 is seized object, and 6 is the line array transmission detector.When the scanning generator rotates to the (Fig. 3-a) of aperture 2-6 will transmit X ray the time; Rearmounted slit collimator 3 provides synchronizing signal and connects backscattered channel synchronous switch 7; Break off transmission channels synchro switch 9, the signal of backward scattering detector 4 can be through synchro switch 7 outputs.When the dotted line composite scanning generator rotates to the (Fig. 3-b) of fan-shaped slit 2-5 will transmit X ray the time; Slit collimator 3 provides synchronizing signal and connects transmission channels synchro switch 9; Break off backscattered channel synchronous switch 8; The signal of line array transmission detector 6 can obtain transmission image through synchro switch 9 outputs.
In the imaging device of the present invention, the structure of dotted line composite scanning generator can have four kinds of different structural forms, wherein:
First kind of version is as shown in Figure 4, (a) is preceding right view, (b) is side view.The dotted line composite scanning generator can be the three layers of open circles tray type structure in left, center, right; Middle level 2-1 (representing with black) radially has a plurality of apertures such as 2-6; The forward surface of left and right two-layer 2-2 and 2-3 is the conical surface, and the angle theta of two conical surfaces is for carrying out about three-dimensional imaging required two subtense angle to testee, two radially respectively have on the conical surface in opposite directions many to slit such as 2-4 and 2-5; The outside of hollow disk is provided with alpha ray shield box 2-7, and the alpha ray shield box is provided with the ray outlet.
The subtended angle α commit point scanning of alpha ray shield box opening and the scanning subtended angle of line sweep.All there is the interval of angle of circumference more than or equal to α each both sides, aperture on the 2-1 wall of scanning generator middle level, have only an aperture scanning during guarantee point scanning.Subtended angle β≤180 °-2 α that crack on the conical surface of the scanning generator left and right sides two-layer (2-2 and 2-3).When needs scanning subtended angle α is 60 °, β≤60 °, when needs scanning subtended angle α is 70 °, β≤40 °.Each unit of linear array detector can receive the time of ray in each scanning and the ratio of each sweep time is beta/alpha.
Because crack 2-4 and the 2-5 that are distributed on the conical surface are not fan-shaped but " watt shape ".On principle, the array transmission detector just should be the one section circular arc towards radiation that is distributed on the conical surface, and the track while scan on seized object also is " arc scanning " rather than line sweep.Though this is all proofreaied and correct by computing machine easily is the line sweep image; But on engineering construction; Be that watt shape seam of 2-4 and 2-5 is suitably widened; Add a rearmounted slit collimator 3 (Fig. 5) in its place ahead, can obtain angle is two fan beams of θ, and detector also just can adopt conventional linear array detector.In the rearmounted slit collimator 3 of Fig. 5, (a) be front elevation, (b) be vertical view.3-4 and 3-5 are to be two slits of fan beam with watt shape beam shaping, and 3-6 provides the slit of pencilbeam outlet.3-3 is a radiation transducers, and when aperture on the dotted line composite scanning device or slit rotated to sensor 3-3, sensor 3-3 exported synchronized switching signal, opens backscattered channel or transmission channels.Described rearmounted slit collimator 3 also has fan-beam slit dog catch 3-1 and 3-2, can when only needing backward scattering scanning, move on to the outlet of fan-beam slit to both sides, closes fladellum, only carries out the spot scan back scattering imaging.
In the above-mentioned imaging device, second kind of dotted line composite scanning generator can be hollow cylinder formula structure.The external diameter that reduces the hollow garden of the described dotted line composite scanning generator of Fig. 4 dish just can become core structure.Can weight reduction, volume and rotation power consumption, but core structure ray captured alignment is short, influences the spatial resolution of image, is suitable for low-cost product.
In the above-mentioned imaging device, the third dotted line composite scanning generator is the hollow tray type structure of individual layer that is used for backward scattering and plane transmission imaging, and is as shown in Figure 6, (a) is front elevation, (b) is side view.Barrel upper edge circumference has a plurality of aperture such as 2-6 and a plurality of entad slit such as 2-5 over against the center of circle, and both are alternately evenly distributed.The outside of disk is provided with alpha ray shield box 2-7, and the alpha ray shield box is provided with the ray outlet.
In above-mentioned backward scattering and the plane transmission imaging device, another kind of dotted line composite scanning generator structure is installed in outside the radiation source, rotates towards radiation source.As shown in Figure 7.(a) being front elevation, (b) is side view.The ray of radiation source 1 becomes fladellum, a side of directive chopper wheel 14 through preposition slit collimator 13.The slit 14-1 and the fan-shaped window 14-2 that alternately arrange are arranged on the chopper wheel, alternately export pencilbeam and fan beam during the chopper wheel rotation.This structure is applicable to the radiation source of different model and volume, but the beam collimation quality not as above-mentioned the third.
Vehicle apparatus of the present invention is as shown in Figure 8, and A is a front elevation, and B is a vertical view.The 15th, scanning car; The 1st, radiation source, the 2nd, dotted line composite scanning generator; The 3rd, rearmounted slit collimator, the 4th, large tracts of land backward scattering detector, the 5th, be examined vehicle or goods, the 6th, the line array transmission detector; The 16th, linear array detector collection cabin, the 17th, liftable turntable; The 18th, expansion link; Because the present invention has the alternate sweep of fan beam (solid arrow) and pencilbeam (thick dashed line), scanning car can obtain meticulous stereo transmission image and the backscatter images that highlights lightweight object simultaneously.When needs are packed up linear array detector, linear array detector is concealed in the collection cabin 16 behind the car through liftable turntable 17 and expansion link 18; The vertical direction part of linear array detector 7 can fold, so that collection.
After packing up linear array detector 6, move the fan-shaped slit dog catch of rearmounted slit collimator 3, close two line sweep fladellums, can carry out backward scattering scanning merely, be suitable for more seized goods or vehicle being checked.Because simple backward scattering scanning radiation dosage is low, might detect manned vehicle.
Claims (4)
1. dotted line composite scanning formula backward scattering and stereo transmission imaging device is characterized in that this imaging device comprises radiation source, dotted line composite scanning generator, rearmounted slit collimator, line array transmission detector, transmission channels synchro switch, transmission signal processor, backward scattering detector, backscattered channel synchronous switch, backscattered signal processor, image computer and stereo-picture viewer; Described dotted line composite scanning generator is sleeved on the radiation source; Described rearmounted slit collimator with the ray collimation of dotted line composite scanning generator outgoing in sector display face; Said rearmounted slit collimator and backward scattering detector place radiation source one side of object to be detected, and described line array transmission detector places the opposite side of object to be detected; Described backscattered channel synchronous switch and backscattered signal processor are connected in turn between backward scattering detector and the image computer through cable, and described transmission channels synchro switch and transmission signal processor are connected in turn between line array transmission detector and the image computer through cable;
Described dotted line composite scanning generator is the three layers of open circles tray type structure in left, center, right; The middle level radially has a plurality of apertures; Left and right two-layer forward surface is the conical surface, and the angle of two conical surfaces is two subtense angles that object to be detected carried out three-dimensional imaging, radially respectively has a plurality of slits on two conical surfaces; The outside of open circles tray type structure is provided with the alpha ray shield box, and the alpha ray shield box is provided with the ray outlet;
Said dotted line composite scanning generator rotates with one heart.
2. dotted line composite scanning formula backward scattering and stereo transmission imaging device is characterized in that this imaging device comprises radiation source, dotted line composite scanning generator, rearmounted slit collimator, line array transmission detector, transmission channels synchro switch, transmission signal processor, backward scattering detector, backscattered channel synchronous switch, backscattered signal processor, image computer and stereo-picture viewer; Described dotted line composite scanning generator is sleeved on the radiation source; Described rearmounted slit collimator with the ray collimation of dotted line composite scanning generator outgoing in sector display face; Said rearmounted slit collimator and backward scattering detector place radiation source one side of object to be detected, and described line array transmission detector places the opposite side of object to be detected; Described backscattered channel synchronous switch and backscattered signal processor are connected in turn between backward scattering detector and the image computer through cable, and described transmission channels synchro switch and transmission signal processor are connected in turn between line array transmission detector and the image computer through cable;
Said dotted line composite scanning generator is hollow core structure; Barrel upper edge circumference has a plurality of apertures over against the center of circle; Have a plurality of R-joinings entad in the both sides of aperture; Article two, the angle between the R-joining is two subtense angles that object to be detected carried out three-dimensional imaging in opposite directions, and the outside of hollow core structure is provided with the alpha ray shield box, and the alpha ray shield box is provided with the ray outlet;
Said dotted line composite scanning generator rotates with one heart.
3. dotted line composite scanning formula backward scattering and stereo transmission imaging device is characterized in that this imaging device comprises radiation source, dotted line composite scanning generator, rearmounted slit collimator, line array transmission detector, transmission channels synchro switch, transmission signal processor, backward scattering detector, backscattered channel synchronous switch, backscattered signal processor, image computer and stereo-picture viewer; Described dotted line composite scanning generator is sleeved on the radiation source; Described rearmounted slit collimator with the ray collimation of dotted line composite scanning generator outgoing in sector display face; Said rearmounted slit collimator and backward scattering detector place radiation source one side of object to be detected, and described line array transmission detector places the opposite side of object to be detected; Described backscattered channel synchronous switch and backscattered signal processor are connected in turn between backward scattering detector and the image computer through cable, and described transmission channels synchro switch and transmission signal processor are connected in turn between line array transmission detector and the image computer through cable;
Said dotted line composite scanning generator is the hollow tray type structure of individual layer, Pan Bi upper edge circumference have a plurality of over against the center of circle, alternatively distributed aperture and slit, the outside of the hollow tray type structure of individual layer is provided with the alpha ray shield box, the alpha ray shield box is provided with the ray outlet;
Said dotted line composite scanning generator rotates with one heart.
4. dotted line composite scanning formula backward scattering and stereo transmission imaging device is characterized in that this imaging device comprises radiation source, dotted line composite scanning generator, line array transmission detector, transmission channels synchro switch, transmission signal processor, backward scattering detector, backscattered channel synchronous switch, backscattered signal processor, image computer and stereo-picture viewer; Before described dotted line composite scanning generator places radiation source; Said dotted line composite scanning generator is the unitized construction of preposition slit collimator and chopper wheel, has radial slit and fan-shaped window on the chopper wheel, and radial slit and fan-shaped window space alternately distribute;
The ray that said radiation source penetrates becomes fladellum, the directive chopper wheel through preposition slit collimator; Said dotted line composite scanning generator and backward scattering detector place radiation source one side of object to be detected, and described line array transmission detector places the opposite side of object to be detected; Described backscattered channel synchronous switch and backscattered signal processor are connected in turn between backward scattering detector and the image computer through cable, and described transmission channels synchro switch and transmission signal processor are connected in turn between line array transmission detector and the image computer through cable;
Said chopper wheel is rotated towards radiation source.
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| CN103063691B (en) * | 2011-10-18 | 2014-11-12 | 北京睿思厚德辐射信息科技开发有限公司 | Double-flying line multi-slit scanning backscatter planar imaging, stereoscopic imaging and self-scanning imaging device |
| WO2018020261A1 (en) * | 2016-07-28 | 2018-02-01 | Smiths Heimann Sas | Scatter imaging |
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| CN108535294B (en) * | 2018-02-02 | 2020-10-09 | 中国原子能科学研究院 | Scanning device for X-ray back scattering imaging system |
| CN108549111B (en) * | 2018-02-08 | 2019-12-27 | 同济大学 | Mobile in-vehicle panoramic X-ray back scattering scanning security inspection device |
| CN108389768B (en) * | 2018-05-10 | 2024-03-12 | 同方威视技术股份有限公司 | Combined scanning X-ray generator |
| CN109031441B (en) * | 2018-08-16 | 2023-10-17 | 东莞深圳清华大学研究院创新中心 | X-ray back scattering scanner and scanning method |
| CN115931937A (en) * | 2021-08-17 | 2023-04-07 | 同方威视技术股份有限公司 | Backscatter inspection apparatus |
| CN114624785B (en) * | 2022-05-16 | 2022-08-19 | 天津速通科技有限公司 | Same light source setting method suitable for novel double-source mixed detection type channel type security inspection system |
| CN115508392A (en) * | 2022-10-28 | 2022-12-23 | 同方威视技术股份有限公司 | Scanning imaging apparatus and scanning imaging method |
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| CN1343883A (en) * | 2001-09-21 | 2002-04-10 | 清华大学 | Detecting method and equipment for X-or gamma-radiation imaging |
| US7099434B2 (en) * | 2002-11-06 | 2006-08-29 | American Science And Engineering, Inc. | X-ray backscatter mobile inspection van |
| CN1717146A (en) * | 2004-06-29 | 2006-01-04 | 通用电气公司 | Detector for radiation imaging systems |
| CN101113961A (en) * | 2006-07-27 | 2008-01-30 | 上海英迈吉东影图像设备有限公司 | Image-forming system with X-ray backscattering and tomography scanning |
| CN201173903Y (en) * | 2008-03-14 | 2008-12-31 | 王经瑾 | Jumping point scanning radiation image forming apparatus |
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