CN202929217U - Backscattering human body security check system capable of monitoring radioactive substances carried by human body - Google Patents
Backscattering human body security check system capable of monitoring radioactive substances carried by human body Download PDFInfo
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- CN202929217U CN202929217U CN201220416743.3U CN201220416743U CN202929217U CN 202929217 U CN202929217 U CN 202929217U CN 201220416743 U CN201220416743 U CN 201220416743U CN 202929217 U CN202929217 U CN 202929217U
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Abstract
The utility model discloses a backscattering human body security check system capable of monitoring radioactive substances carried by a human body, which comprises a radiation source, a flying spot forming device, a detector, and a control and data processing device, wherein the radiation sources is used for generating radiation rays; the flying spot forming device modulates the radiation rays coming from the radiation source so as to form flying spot scanning beams used for scanning a human body being detected; the detector is used for detecting radiation rays coming from the human body being detected and outputting signals representing the dose of the radiation rays; the control and data processing device is used for processing the signal outputted by the detector so as to obtain radiation imaging of the human body being detected; and the detector detects the radiation rays, which come from the radiation source, radiated by the human body and the radiation rays of radioactive substances carried by the human body being detected in a time-sharing manner. Under the premise of not increasing or changing the hardware, the backscattering human body security check system disclosed by the utility model effectively expands the application range of backscattering human body scanning equipment, increases a function of monitoring the radioactive substances carried by the human body, and further improving the effect of security check of the human body.
Description
Technical field
The utility model relates to a kind of human body safety inspection system, but particularly relates to the backward scattering human body security check system that a kind of monitoring human carries radiomaterial.
Background technology
The back scattering imaging technology is one of major technique of human body safety check, by scanning human body with X-ray beam, uses simultaneously large area detector to receive scattered signal, and data can obtain dispersion image with scanning position and scattered signal point point correspondence when processing.
Except the dangerous material such as gun, cutter, explosive, radioactive source is also one of human body dangerous material that may carry.But existing human body safety check equipment comprises backward scattering equipment, millimeter wave equipment etc., and all less than monitoring and the warning function realized radioactive source, this is a leak place of human body safety check.
Therefore, be necessary to utilize the large area detector that uses in backward scattering body scans rays safety detection apparatus, under suitable check process and algorithm support, with the monitoring that realizes human body is carried radioactive source, further improve the effect of human body safety inspection.
The utility model content
Given this, the purpose of this utility model is intended to solve at least one aspect of the above-mentioned problems in the prior art and defective.
Correspondingly, one of the purpose of this utility model is to provide a kind of can the realization to carry to human body the backward scattering human body safety inspection system that the monitoring of radioactive source detects.
According to an aspect of the present utility model, but its backward scattering human body security check system that provides a kind of monitoring human to carry radiomaterial, and it comprises: for generation of the radiation source of radiation ray; Flying spot forms device, and it is to modulating to form the flying-spot scanner bundle that detected human body is scanned from the radiation ray of radiation source; The radiation ray that is used for surveying from detected human body is also exported the detector of the signal that characterizes radiation ray dosage; Control and data processing equipment, be used for the described signal of described detector output is processed to obtain the radiant image of detected human body, wherein: the radiation ray of the radiomaterial that carries from the radiation ray of radiation source and from detected human body of detected person's volume scattering is surveyed in described detector timesharing.
Particularly, also comprise but described monitoring human carries the backward scattering human body security check system of radiomaterial: display device, it is used for showing the radiant image of the detected human body that obtains.
in technique scheme, described flying spot forms device and comprises: lay respectively at radiation source and be scanned fixed mask plate and rotating shield between object, wherein said fixed mask plate is fixed with respect to radiation source, described rotating shield is rotatable with respect to the fixed mask plate, wherein: be provided with the beam that allows from described radiation source on described fixed mask plate and pass the ray of described fixed mask plate by the zone, be respectively arranged with ray incident area and ray outgoing on rotating shield regional, in rotating shield rotation sweep process, the ray of fixed mask plate scans collimating aperture by ray incident area and continuous the intersecting to consist of of ray outgoing zone of zone and rotating shield.
Further, the ray of described fixed mask plate is rectilinear slot by the zone, and described rotating shield is right cylinder, and described ray incident area and described ray outgoing zone are respectively series of discrete aperture or the slit that arranges along helix.
Alternatively, described detector is done as a whole the ray of returning from the surface scattering that is scanned human body to be surveyed, produce electric signal and by single transmission line be admitted to control with data processing equipment in process.
Alternatively, described detector comprises a plurality of probe units, and it is surveyed the ray of returning from the surface scattering that is scanned human body respectively, produce electric signal respectively the transmission line by separately be admitted to control with data processing equipment in process.
More specifically, described radiation source is X-ray machine, gamma ray projector or isotope radiographic source; And described detector is plastic scintillator detector or inorganic scintillator detector.
According on the other hand of the present utility model, but it provides the scan method of the backward scattering human body security check system that a kind of monitoring human carries radiomaterial, and described method comprises step:
(a) drive described radiation source emitted radiation beam;
(b) form device to modulating to form the flying spot beam from the beam of radiation source by flying spot, and incide and be scanned on human body;
The radiation ray of (c) returning from detected person's volume scattering by described detector detection produces electric signal and is imported in control and treating apparatus and process, to obtain the backward scattering radiant image;
(d) by described detector, the radiation ray of the radiomaterial that carries from detected human body is surveyed, produce electric signal and be imported into control with treating apparatus in process, to obtain the radiomaterial radiant image, wherein:
Described backward scattering radiation detection step (c) and described radiomaterial radiation detection step (d) timesharing are carried out.
Particularly, described radiomaterial radiation detection step (d) comprising: when not being detected human body before not emitted radiation of radiation source ray and equipment, detector is placed in duty, carry out X-ray detection X, control with data processing equipment and carry out the data processing, use predetermined algorithm to extract characteristic quantity, as the environmental exact details characteristic quantity; When before not emitted radiation of radiation source ray and equipment, detected human body being arranged, identical duty when being placed in detector with measurement environment parameter attribute amount, carry out X-ray detection X, control and to carry out with data processing equipment that data are processed and carry out Characteristic Extraction, as detected person's body characteristics amount; Relatively detected person's body characteristics amount and environmental exact details characteristic quantity, if detected person's body characteristics amount reaches certain threshold value higher than the environmental exact details characteristic quantity, think that this detected human body has the suspicion of carrying radiomaterial.
Particularly, above-mentioned detected person's body characteristics amount and environmental exact details characteristic quantity are preferably: certain section interior signal level mean value of time; Certain section interior number of pulses that surpasses certain level value of time; Certain section interior signal level mean value and certain section interior statistical parameter that surpasses the number of pulses of certain level value of time of time; Or the various combinations of these numerical value or statistical parameter.
In the method step of relatively environmental characteristic amount and detected person's body characteristics amount, it comprises: directly relatively provide detected human body whether with the conclusion of radiomaterial; Or described various characteristic quantity comprehensively relatively draws the conclusion that detected human body carries the probability of radiomaterial.
In a kind of embodiment, described detector comprises a plurality of probe units, it is surveyed the ray of returning from the surface scattering that is scanned human body respectively, produce electric signal respectively the transmission line by separately be admitted to control with data processing equipment in process.Described method also comprises step: based on the detection output valve of described a plurality of probe units, whether the zones of different of the detected human body of judgement exists radiomaterial or each zone to have the probability of radiomaterial.
In a kind of preferred implementation, carry out the operation of measurement environment background characteristic quantity in the time period of unmanned scanning after device start.
In a kind of preferred implementation, carry out the operation of measuring detected person's body characteristics amount in the time period that the setup time before detected human body is in equipment or detected human body are turned round before equipment.
Above-mentioned not specific embodiment of the present utility model has advantage and the effect of following one or more aspect at least:
According to an aspect of the present utility model, it can not increase and change under the prerequisite of hardware, effectively expand the range of application of backward scattering body scanner, increase equipment carries the monitoring function of radiomaterial to human body, further improve the effect of human body safety inspection.
Description of drawings
Fig. 1 is the schematic diagram that shows according to the typical backward scattering body scans system in a kind of embodiment of the present utility model;
But Fig. 2 shows the schematic diagram that carries the backward scattering human body security check system of radiomaterial according to the monitoring human of the use polylith detector in another kind of embodiment of the present utility model;
Fig. 3 is the decomposing schematic representation that shows according to the ray generator 1 in a kind of embodiment of the present utility model and flying spot formation device 2;
Fig. 4 is the sectional view that shows that ray generator 1 in Fig. 3 and flying spot form the principle of work of device 2; And
Fig. 5 A is the workflow diagram of the backward scattering human body safety inspection system that do not carry out that radiomaterial detects; Fig. 5 B is the workflow diagram of the backward scattering human body safety inspection system that carries out that radiomaterial detects.
Embodiment
Below by embodiment, and 2-3 by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.In instructions, the same or analogous parts of same or analogous drawing reference numeral indication.Following explanation to the utility model embodiment is intended to overall utility model design of the present utility model is made an explanation with reference to accompanying drawing, and not should be understood to a kind of restriction of the present utility model.
Fig. 1 shows according to the typical backward scattering body scans system in a kind of embodiment of the present utility model, as shown in Figure 1, this system comprises that ray generator 1, the flying spot as radiation source forms device 2, and it is to modulating to form the flying-spot scanner bundle that detected human body is scanned from the radiation ray of radiation source; Be used for detection and characterize detector 3, control and the data processing terminal 5 of the signal of radiation ray dosage from the radiation ray of detected human body and output, for the described signal of described detector output being processed to obtain the radiant image of detected human body; And as the display terminal 6 of display device, for example LCD display.After the beam that is sent by ray generator 1 forms the modulation of device 2 through flying spot, form the flying spot beam, incide and be scanned on human body 4, then on the surface that is scanned human body 4, backward scattering occurs, the ray that scattering is returned is detected device 3 and receives, produce electric signal and send in control and data processing terminal 5, processing obtains scan image and shows on display terminal 6.As shown in Figure 1, ray generator 1, flying spot form device 2, detector 3 and display terminal 6 respectively by transmission line 15,25,35 and 56 are connected to control and data processing terminal 5, to realize above-mentioned each ray generator 1, flying spot are formed the control of device 2, detector 3 and display terminal 6.
Fig. 3-4 show according to the ray generator 1 in a kind of embodiment of the present utility model and flying spot and form device 2.As shown in Figure 3, in above-described embodiment of the present utility model, ray generator 1 comprises ray generator housing 11 and the radiation source 13 that is contained in ray generator housing 11.In said structure, radiation source 13 can be X-ray machine, gamma ray projector or isotope radiographic source etc.In the above-described embodiments, flying spot forms device 2 and comprises and lay respectively at radiation source 13 and be scanned fixed mask plate 14 and rotating shield 21 between object 4, wherein fixed mask plate 14 is fixed with respect to radiation source 13, and rotating shield 21 is rotatable with respect to fixed mask plate 14.Further, be provided with the beam that allows from radiation source 13 on fixed mask plate 14 and pass the ray of fixed mask plate 14 by zone, for example longitudinal slot in Fig. 3 50.Be respectively arranged with ray incident area 23 on rotating shield 21, for example series of discrete aperture or the slit that arrange along helix in Fig. 3, and ray outgoing zone 22, for example the series of discrete aperture or the slit that arrange along helix in Fig. 3.In rotating shield 21 rotation sweep processes, the ray of fixed mask plate 14 intersects to consist of the scanning collimating aperture continuously by zone 50 and ray incident area 23 and the ray outgoing regional 22 of rotating shield 21.In the above-described embodiments, fixed mask plate 14 is arranged between radiation source 13 and rotating shield 21.Further, as shown in Figure 3, this system can also comprise for the drive unit 26 that drives rotating shield 21 rotations, such as buncher etc.
As shown in Figure 3-4, in a kind of specific embodiment, ray generator housing 11 is substantially rectangular parallelepiped cassette shapes, is provided with on it to make the radiation ray that sends from radiation source 13 from collimation gap 31 outgoing of ray generator housing 11.The beam 40 that the target spot P of radiation source 13 launches passes collimation gap 31 and forms a ray covering of the fan, then through passing fixed mask plate 14 pass through regional, the longitudinal slot 50 in 3 for example; The ray incident area 23 of rotating shield 21, the series of discrete aperture or the slit that for example arrange along helix in Fig. 3-4, and ray outgoing zone 22, the series of discrete aperture or the slit that for example arrange along helix.The relative position relation in the longitudinal slot 50 by fixed mask plate 14 is set, the ray incident area 23 of rotating shield 21 and ray outgoing zone 22, so that in rotating shield 21 rotation sweep processes, the ray of fixed mask plate 14 intersects to consist of the scanning collimating aperture continuously by discrete aperture or the slit in the discrete aperture in the ray incident area 23 of zone 50 and rotating shield 21 or slit and ray outgoing zone 22.In other words, the discrete aperture in the discrete aperture in the ray incident area 23 on rotating shield 21 or slit, ray outgoing zone 22 or the vertical narrow slit on slit and fixed mask plate 14 50 are common forms a ray collimating aperture.Selectively, as shown in Figure 3-4, described discrete aperture 32,22 be shaped as circularly, square or oval, be preferably circle.
As shown in Figure 3-4, the ray of fixed mask plate 14 50 be rectilinear slot by the zone, and rotating shield 21 is right cylinder, and ray incident area 3 and ray outgoing zone 2 are respectively along the series of discrete aperture 32 of helix setting.Specifically, referring to Fig. 2, any discrete aperture in figure in ray incident area 23 and ray outgoing zone 22, A and B point for example, do uniform circular motion along the face of cylinder of rotating shield 21 on the one hand, do rectilinear motion along the axial direction of rotating shield 21 according to the certain speed distribution on the other hand, thereby form specific right cylinder helix.In a kind of specific embodiment, the any point in ray incident area 23 and ray outgoing zone 22 for example A and B point in figure, can do uniform circular motion along the face of cylinder of rotating shield 21 on the one hand, on the other hand along the radial direction of rotating shield 21 according to making linear uniform motion, thereby form constant speed right cylinder helix.Referring to Fig. 4, after the A point of the target spot P of radiation source 13 and ray incident area 23 is determined, connect the beam 40 of the incidence point A point formation of the target spot P of radiation source 13 and ray incident area 23, can determine the eye point B on ray outgoing zone 22.Owing to ray incident area 23 and ray outgoing zone 22 being arranged to constant speed right cylinder helix form, when rotating shield 21 at the uniform velocity rotates, move with the rotation of shielding rotary body 21 position of ray collimating aperture, emergent ray bundle 40 also moves thereupon, thereby the scanning collimating aperture is moved along rectilinear slot 50 continuously and smoothlies.
Referring to Fig. 3, ray generator housing 11 can also be connected with fixed mask plate 14 by shroud sleeve 12, to guarantee the shielding of ray.Can find out from above-mentioned the setting, radiation source 13 is not arranged on the inside of rotating shield 21, and be arranged on the inside of ray generator housing 11, this scanning mechanism mates as the shroud sleeve 12 of mechanical interface on the X-ray machine of volume production and can complete, thereby make the compact conformation of scanister, do not need to redesign the shield of X-ray machine, saved cost.
In above-mentioned backward scattering human body safety inspection system, the ray signal of returning from being scanned human body 4 scatterings for collection as much as possible uses large area detector 3, for example plastic scintillator detector usually in backward scattering body scans system.In embodiment shown in Figure 1, large area detector 3 is done as a whole the ray of returning from the surface scattering that is scanned human body 4 to be surveyed, produce electric signal and by single transmission line 35 and send into control with data processing terminal 5 in.
Below in conjunction with accompanying drawing 5A and 5B, the mode of operation according to backward scattering human body safety inspection of the present utility model system is described.Wherein 5A is the workflow diagram of the backward scattering human body safety inspection system that do not carry out that radiomaterial detects; Fig. 5 B is the workflow diagram of the backward scattering human body safety inspection system that carries out that radiomaterial detects.
As shown in Fig. 5 A, during the starting up, equipment is powered up, then carry out the initialization of soft and hardware.After ER equipment ready, wait for the instruction of whether carrying out backward scattering scanning.If control system provides the scan instruction of carrying out backward scattering, radiographic source 13, for example X-ray machine goes out bundle, after the form of a stroke or a combination of strokes beam that is sent by ray generator 1 forms the modulation of device 2 through flying spot, form flying spot beam 234, incide to be scanned on human body 4 and carry out along first direction, for example the human body vertical direction in Fig. 1-2 carries out the first dimension scanning.Meanwhile, by mechanical linkage so that flying spot forms device 2 carries out translation or rotate human body is carried out the second dimension scanning in the vertical direction of first direction of form of a stroke or a combination of strokes beam 234 scannings with respect to being scanned human body 4.Then, on the surface that is scanned human body 4, backward scattering occurs, the ray that scattering is returned is detected device 3 and receives, and produces electric signal and sends in control and data processing terminal 5, processing obtains scan image and shows on display terminal 6, thereby completes backward scattering scan operation process one time.
Fig. 5 B shows the workflow diagram of the backward scattering human body safety inspection system that carries out that radiomaterial detects.As shown in Fig. 5 B, wherein backward scattering scan operation step and the operation steps in Fig. 5 A are basic identical, and its difference is that it comprises the process step that carries out the radiomaterial detection.Particularly, before ray generator 1 is not launched X ray and equipment when detected human body 4, detector 3 is placed in duty, carry out X-ray detection X, control with data processing terminal 5 and carry out the data processing, use predetermined algorithm to extract characteristic quantity, as environmental parameter characteristic quantity or environmental exact details characteristic quantity; When having detected human body 4 and ray generator 1 not to launch X ray before equipment, identical duty when being placed in detector 3 with measurement environment parameter attribute amount, carry out X-ray detection X, control and to carry out with data processing terminal 5 that data are processed and carry out Characteristic Extraction, as detected person's body characteristics amount; Compare detected person's body characteristics amount and environmental parameter characteristic quantity or environmental exact details characteristic quantity, if detected person's body characteristics amount reaches certain threshold value higher than environmental parameter characteristic quantity or environmental exact details characteristic quantity, think that this detected human body 4 has the suspicion of carrying radiomaterial.
Above-mentioned characteristic quantity is preferably: certain section interior signal level mean value of time; Or certain section interior number of pulses that surpasses certain level value of time; The statistical parameter that surpasses the number of pulses of certain level value in signal level mean value in certain period and certain period such as standard deviation etc., also can comprise the various combinations of these numerical value or parameter.Need to prove, the algorithm of choosing to choosing of above-mentioned characteristic quantity is relevant, includes but not limited to above-mentioned these characteristic quantities.
In the method step of relatively environmental characteristic amount and detected person's body characteristics amount, include but not limited to following manner: directly relatively provide detected human body whether with the conclusion of radiomaterial; Comprehensively relatively drawing with described various characteristic quantities the possibility that detected human body carries radiomaterial is the conclusion of probability.
But Fig. 2 shows the schematic diagram that carries the backward scattering human body security check system of radiomaterial according to the monitoring human of the use polylith detector in another kind of embodiment of the present utility model.As shown in Figure 2, but comprise that according to the backward scattering human body security check system that monitoring human of the present utility model carries radiomaterial ray generator 1, flying spot form device 2, detector 3, control and data processing terminal 5 and display terminal 6.When flying spot forms device 2 High Rotation Speed, the fladellum of outgoing from x-ray source 1 can be modulated to the pencil beam of a plurality of in the vertical direction timesharing outgoing.Each only has a branch of pencil beam to form the pocket that device 2 shines the body surface that is scanned human body 4 by flying spot constantly, and be scattered at human body surface, then be detected device 301,302,303 and 304 received, produce electric signal and by transmission line 3015,3025,3035 and 3045 independently send into respectively control with data processing terminal 5 in, process obtaining scan image and show on display terminal 6.
In a kind of specific embodiment, detector 301,302,303 and 304 uses plastic scintillant, X ray can be in this material sedimentary energy and launch the light signal that is proportional to sedimentary energy, these light signals are collected and are converted into electric signal and import in data handling machine 5 by photomultiplier.Just obtained like this this scattered signal of this ad-hoc location of human body surface constantly in control and data processing terminal 5, this signal is proportional to the energy deposition of scattered x-ray in detector, has also just reflected the power of backscatter signal.By mechanical linkage so that flying spot forms device 2 carries out translation or rotate human body is carried out the second dimension scanning in the vertical direction of first direction of form of a stroke or a combination of strokes beam 234 scannings with respect to being scanned human body 4, can scan human body surface, and then obtain the scattered signal of whole human body surface, be combined to form backscatter images.
When integrated radioactive material measuring ability, as shown in Fig. 5 B, device ready and be scanned human body 4 stand on equipment before the time, carry out collection and the calculating of environmental exact details characteristic quantity; When being scanned human body 4 needs inspection, before X-ray machine goes out bundle, adopt the schedule time, for example the time about 1 second, be scanned data acquisition and the calculating of human body 4, obtain detected person's body characteristics amount, and compare with the environmental exact details characteristic quantity, provide result and be presented on software interface, allowing again afterwards X-ray machine go out bundle, carrying out scanning process.In above-mentioned radioactive material detecting step, detector and data processing terminal that the detector that the environmental exact details collection is used and data processing terminal and collection human body X ray backscatter signal use are just the same.Thus, utilize the susceptibility of 3 pairs of rays of detector of above-mentioned Back-scattering System, by changing or increasing scanning process, data acquisition and algorithm, the radiomaterial that can carry human body under the condition that does not increase hardware is monitored.
In the above-described embodiments, as shown in Figure 2, control and to process respectively from data processing terminal 5 data that different detector module 301,302,303,304 receives and obtain a few stack features amounts, comprise environmental exact details characteristic quantity and detected person's body characteristics amount, through after Algorithm Analysis, obtain detected human body 4 health zoness of different and whether exist radiomaterial or each zone to have the conclusion of the probability of radiomaterial.
Although, in the above-described embodiment, device ready and be scanned human body 4 stand on equipment before the time, carry out collection and the calculating of environmental exact details characteristic quantity; When being scanned human body 4 needs inspection, before X-ray machine goes out bundle, be scanned data acquisition and the calculating of human body 4, obtain detected person's body characteristics amount.But the utility model is not limited in this, the time period of above-mentioned measurement environment parameter attribute amount and the time period of measuring detected person's body characteristics amount, and can be according to the scanning process flexible customization.On the one hand, the time period of measurement environment parameter attribute amount only need satisfy condition " ray generator 1 is not launched detected human body 4 before X ray and equipment " get final product, include but not limited to the unmanned time of scanning after device start; On the other hand, the time period of measuring detected person's body characteristics amount only need satisfy condition " ray generator 1 do not launch X ray and detected human body be in equipment before " get final product, include but not limited to before detected human body is in equipment setup time, be detected time that human body turns round etc. before equipment.In other words, the radiation ray of the radiomaterial that carries from the radiation ray of radiation source 1 and from detected human body 4 of detected human body 4 scatterings is surveyed in 3 timesharing of described detector.
Although 1-5 is illustrated preferred implementation of the present utility model by reference to the accompanying drawings, should be understood that, above-mentioned embodiment does not have limited significance to the utility model.For example form device except the rotational circle cartridge type flying spot in the utility model embodiment, it can be also the alternate manners such as wheel, disc type that above-mentioned flying spot forms device.Although the large area detector 3 in the preferred implementation in the utility model adopts plastic scintillator detector, the utility model is not limited in this, and it also can adopt the inorganic scintillator detector, for example CsI, BaFCl inorganic scintillator detector.Although adopted detector module 301,302,303, the 304 detector distribution forms with respect to detected human body symmetry arrangement in above-mentioned embodiment, the utility model is not limited in this, for example also other arrangement mode may be arranged.In addition, detector both can maintain static, also can be by mechanical linkage which controls laterally or vertically move.
Although some embodiment of this overall utility model design are shown and explanation, those skilled in the art will appreciate that, in the situation that do not deviate from principle and the spirit of this overall utility model design, can make a change these embodiment, scope of the present utility model limits with claim and their equivalent.
Claims (7)
1. but a monitoring human carries the backward scattering human body security check system of radiomaterial, and it comprises:
Radiation source for generation of radiation ray;
Flying spot forms device, and it is to modulating to form the flying-spot scanner bundle that detected human body is scanned from the radiation ray of radiation source;
The radiation ray that is used for surveying from detected human body is also exported the detector of the signal that characterizes radiation ray dosage;
Control and data processing equipment, for the described signal of described detector output being processed to obtain the radiant image of detected human body, wherein:
The radiation ray of the radiomaterial that carries from the radiation ray of radiation source and from detected human body of detected person's volume scattering is surveyed in described detector timesharing.
2. but monitoring human according to claim 1 carries the backward scattering human body security check system of radiomaterial, characterized by further comprising:
Display device, it is used for showing the radiant image of the detected human body that obtains.
3. but monitoring human according to claim 1 and 2 carries the backward scattering human body security check system of radiomaterial, it is characterized in that described flying spot forms device and comprises:
Lay respectively at radiation source and be scanned fixed mask plate and rotating shield between object, wherein said fixed mask plate is fixed with respect to radiation source, and described rotating shield is rotatable with respect to the fixed mask plate, wherein:
Be provided with on described fixed mask plate and allow ray that the beam from described radiation source passes described fixed mask plate by the zone,
Be respectively arranged with ray incident area and ray outgoing on rotating shield regional, in rotating shield rotation sweep process, the ray of fixed mask plate scans collimating aperture by ray incident area and continuous the intersecting to consist of of ray outgoing zone of zone and rotating shield.
4. but monitoring human according to claim 3 carries the backward scattering human body security check system of radiomaterial, it is characterized in that:
The ray of described fixed mask plate is rectilinear slot by the zone,
Described rotating shield is right cylinder, and described ray incident area and described ray outgoing zone are respectively series of discrete aperture or the slit that arranges along helix.
5. but monitoring human according to claim 1 and 2 carries the backward scattering human body security check system of radiomaterial, it is characterized in that:
Described detector is done as a whole the ray of returning from the surface scattering that is scanned human body to be surveyed, produce electric signal and by single transmission line be admitted to control with data processing equipment in process.
6. but monitoring human according to claim 1 and 2 carries the backward scattering human body security check system of radiomaterial, it is characterized in that:
Described detector comprises a plurality of probe units, and it is surveyed the ray of returning from the surface scattering that is scanned human body respectively, produce electric signal respectively the transmission line by separately be admitted to control with data processing equipment in process.
7. but monitoring human according to claim 1 and 2 carries the backward scattering human body security check system of radiomaterial, it is characterized in that:
Described radiation source is X-ray machine, gamma ray projector or isotope radiographic source; And
Described detector is plastic scintillator detector or inorganic scintillator detector.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103630947A (en) * | 2012-08-21 | 2014-03-12 | 同方威视技术股份有限公司 | Backscattering human body security check system capable of monitoring radioactive substances and scanning method thereof |
| WO2014101593A1 (en) * | 2012-12-27 | 2014-07-03 | 同方威视技术股份有限公司 | Human-body back scattering security check system |
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| WO2017092395A1 (en) * | 2015-12-04 | 2017-06-08 | 同方威视技术股份有限公司 | Security inspection device and ray detection method |
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- 2012-08-21 CN CN201220416743.3U patent/CN202929217U/en not_active Expired - Lifetime
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| CN103630947A (en) * | 2012-08-21 | 2014-03-12 | 同方威视技术股份有限公司 | Backscattering human body security check system capable of monitoring radioactive substances and scanning method thereof |
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| WO2014101593A1 (en) * | 2012-12-27 | 2014-07-03 | 同方威视技术股份有限公司 | Human-body back scattering security check system |
| CN104749604A (en) * | 2013-12-30 | 2015-07-01 | 同方威视技术股份有限公司 | Multiple technology fusion scintillation detector device |
| CN104865281A (en) * | 2014-02-24 | 2015-08-26 | 清华大学 | Human body back scattering inspection method and system |
| RU2602749C2 (en) * | 2014-02-24 | 2016-11-20 | Нуктех Кампани Лимитед | Human body back scattering inspection method and system |
| US9651507B2 (en) | 2014-02-24 | 2017-05-16 | Nuctech Company Limited | Human body back scattering inspection method and system |
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