CN202854352U - X-ray backscattering and transmission combined type safety detector - Google Patents
X-ray backscattering and transmission combined type safety detector Download PDFInfo
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- CN202854352U CN202854352U CN 201220229823 CN201220229823U CN202854352U CN 202854352 U CN202854352 U CN 202854352U CN 201220229823 CN201220229823 CN 201220229823 CN 201220229823 U CN201220229823 U CN 201220229823U CN 202854352 U CN202854352 U CN 202854352U
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Abstract
An X-ray backscattering and transmission combined type safety detector belongs to the technical field of social safety detection and safety protection detection equipment and nondestructive testing equipment. The utility model is mainly characterized in that a rotary cylinder is provided with a backscattered ray slit and a transmission ray beam slit. The two slits respectively generate fly-spot scanning ray beams and transmission ray beams. Therefore, by the use of the same X-ray source and the same ray beam to scan a generator, two-ray image information of a detected object can be simultaneously provided and is comprehensively detected and judged, so as to raise detection rate. The safety detector provided by the utility model has characteristics of simple structure, low cost and the like, and can be used in luggage detection, human body scanning and safety detection in aspects of industry (flaw detection), military affair and the like.
Description
Technical field
The utility model relates to a kind of X-ray scanning safety detection device, relates in particular to the Combined type safety detector of a kind of anti-(back of the body) scattering and transmission, belongs to social safety inspection and safety precaution checkout equipment and non-destructive detecting device technical field.
Background technology
Chinese patent literature (application number 01120599) discloses " a kind of γ back scattering imaging lossless detection method and device ", this technology adopts the radioactive isotope gamma ray projector, be characterized in that the radiographic source overall dimensions is little, transmitted intensity is restricted, but radiogenic focus is bigger than normal.Yet the compactness that the shielding of collimating apparatus and ray can design, the slit rotary body that forms flying spot also can be very compact.But the size of bar-shaped bundle (pencil beam) is still bigger than normal, thereby affects resolution, and general isotope gamma ray projector energy is larger, and requiring rotation slit body is to have certain thickness heavy material to make, and so rotates manufacturing, the operation of slit body and can have any problem.Particularly (turn such as per minute several thousand) when requiring sweep velocity fast, because rotation slit body weight is large, its operation can be under some influence.In addition, this technology is because what adopt is gamma-rays, and the general radiation energy is large, and the backscattering cross section is little, to human body or to be picked up the thing damage larger.
Instead (back of the body) diffuse transmission type ray scanner is to utilize to penetrate the information that anti-(back of the body) scattering is returned on object than low-energy X-ray and measure processing, and then disclose the image of species distribution in the detected material surface layer and a kind of device of information, such as the disclosed a kind of tubbiness flying-spot scanner generating means of Chinese patent technology (ZL03153819.3), it is not only to metal contraband goods sensitivity but also to nonmetallic light materials such as gunpowder, the contraband goodss such as liquid are also responsive, so this device can be the airport, the station, various public building, hall, the shop, social safety the service that provides is provided.
In order to take full advantage of the speciality of x-ray source: ray has the power spectrum of superior through characteristic, scattering properties and suitable wide region; Utilize the X ray of different-energy to the difference that penetrates of different material, can be used for substantially distinguishing the atomic number of different material, help safety detection to the inspection of contraband goods.Proposed at present combined beam scanning in the prior art (device) device has occured, both can carry out anti-(back of the body) scattering detects, the advantage of anti-(back of the body) scattering of performance flying-spot scanner, can form again the X ray transmission detects, such as United States Patent (USP) 6546042, use single x-ray source, owing to structural reason, mutual interference is larger mutually with the backscattering ray to cause transmitted ray, has affected resolution and recall rate; Patented technology after the improvement (CN101501477A) adopts two x-ray sources, although solved the problem of two kinds of ray phases mutual interference, complex structure, cost increases greatly.
The utility model content
The purpose of this utility model provides the Combined type safety detector of a kind of X ray backscattering and transmission, is used for top layer and the inner situation of scanning object, judges thereby carry out comprehensive detection, improves recall rate; Have simultaneously simple in structure, cost is low.
The utility model content
The purpose of this utility model provides the Combined type safety detector of a kind of X ray backscattering and transmission, is used for top layer and the inner situation of scanning object, judges thereby carry out comprehensive detection, improves recall rate; Have simultaneously simple in structurely, cost is low.
The technical solution of the utility model is as follows:
The Combined type safety detector of a kind of X ray backscattering and transmission, this safety detector comprise an x-ray source, the front collimating apparatus of beam, fan ray beam collimator, rotor, backscattering ray detector and computer information processing and display system; Collimating apparatus and fan ray beam collimator are arranged in the rotor before described x-ray source, the beam, and are provided with backscattering ray slit at rotor; Described backscattering ray detector and x-ray source are positioned at the same side of object to be detected, it is characterized in that: on rotor, also be provided with the narrow seam of transmitted ray, the narrow seam of described transmitted ray and backscattering ray slit on rotor along even circumferential and alternate layout, backscattering ray slit is parallel to the cylindrical shell generatrix direction and arranges that the narrow seam of transmitted ray is arranged perpendicular to the cylindrical shell generatrix direction; X ray produces respectively flying-spot scanner beam and transmitted ray bundle by two kinds of different slits; The direction of aiming at the transmitted ray bundle at the opposite side of object to be detected is equipped with a transmitted ray bundle detector; The center line of collimating apparatus, fan ray beam collimator, the narrow seam of transmitted ray and transmitted ray bundle detector is positioned on the central plane of fan-ray beam before described x-ray source, the beam; Backscattering ray slit perpendicular to the central plane of fan-ray beam and with this Plane intersects.
Another technical characterictic of the present utility model is: described backscattering ray detector is that the detector by two rectangular shapes consists of, the detector of two rectangular shapes adopts up and down arrangement, in the middle of two detectors up and down, leave the gaps of 1.5～2.0cm, be provided with a ray slit secondary collimator at this gap location, on the central plane that is centered close to fan-ray beam of this ray slit secondary collimator.
The narrow seam of transmitted ray described in the utility model and backscattering ray slit all adopt 2～3.
Be equipped with a backscattering ray detector alpha ray shield body at described each rectangle detector.
Described transmitted ray bundle detector adopts the dual energy detector of a linear array, is provided with transmitted ray detector shield and an optoisolator at this detector.
The utlity model has following advantage and high-lighting effect: the utility model is on the basis of tubbiness flying-spot scanner generating means, be provided with backscattering ray slit and the narrow seam of transmitted ray at rotor, two kinds of slits produce respectively flying-spot scanner beam and transmitted ray bundle, both can carry out anti-(back of the body) scattering detects, brought into play the advantage of anti-(back of the body) scattering of flying-spot scanner, can form again the X ray transmission detects, brought into play the advantage of (dual energy) X ray transmission scan, can provide simultaneously two kinds of ray image information of object to be detected, thereby carrying out comprehensive detection judges, and effectively overcome between the backscattering ray that adopts same radiographic source and cause and the transmitted ray mutually interference problem, improved recall rate.Compared with prior art, simple in structure, cost is low, not only can be used for case and bag and detects, and also can be used for body scans, also can be used for the safety detection of the aspects such as industry (flaw detection), military affairs.
Description of drawings
The structural principle synoptic diagram (axonometric drawing) of the X ray backscattering that Fig. 1 provides for the utility model and the Combined type safety detector embodiment of transmission.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the D-D section transmitted ray bundle transmission synoptic diagram of Fig. 2.
Among the figure: the 1-X radiographic source; 2-backscattering ray slit; 3-fan ray beam collimator; 4-is picked up object; 5-backscattering ray detector; 6-backscattering ray detector alpha ray shield body; 7-computer information processing and display system; 8-transmitted ray detector; The 9-X ray tube; 10-transmitted ray detector shield; 11-transmitted ray bundle; Collimating apparatus before the 12-beam; The narrow seam of 13-transmitted ray; The 14-optoisolator; 15-ray slit secondary collimator; 16-backscattering ray; The 17-rotor; 18-flying-spot scanner beam; The plumbous band of 19-; 20-ray scanning beam generator; 21-backscattering ray information collector; 22-transmitted ray information acquisition device; The 23-fan-ray beam; A-cylinder sense of rotation; The B-X radiographic source is picked up the relative motion of object direction with quilt.
Embodiment
Below in conjunction with accompanying drawing theory structure of the present utility model, the course of work and implementation are further described.
Fig. 1 comprises an x-ray source 1, is arranged on collimating apparatus 12 before the beam before the x-ray source window, is arranged in fan beam collimator 3, rotor 17, backscattering ray detector 5 and signals collecting and the image processes and displays system 7 of collimating apparatus 12 back before the beam for the structural principle synoptic diagram of the Combined type safety detector embodiment of the X ray backscattering that provides and transmission, this embodiment; Collimating apparatus 12 and fan beam collimator 3 are arranged in the rotor 17 before x-ray source 1, the beam; Be provided with backscattering ray slit 2 and the narrow seam 13 of transmitted ray at rotor; The narrow seam 13 of described transmitted ray and backscattering ray slit 2 even and alternate layout on the barrel of rotor, backscattering ray slit 2 are parallel to the cylindrical shell generatrix direction and arrange that transmitted ray slit 13 is arranged perpendicular to the cylindrical shell generatrix direction.X-ray source 1, backscattering ray detector 5 and rotor are positioned at the same side of object to be detected 4, on the direction of the opposite side aligning transmitted ray bundle of detected material a transmitted ray bundle detector 8 are housed.The center line of collimating apparatus 12, fan ray beam collimator 3, the narrow seam 13 of transmitted ray and transmitted ray bundle detector 8 should be positioned on the central plane of fan-ray beam 23 before x-ray source 1, the beam; Backscattering ray slit 2 perpendicular to the central plane of fan-ray beam and with this Plane intersects.The narrow seam 13 of collimating apparatus 12, fan beam collimator 3, rotor 17, backscattering ray slit 2 and transmitted ray forms ray scanning beam generator 20 before x-ray source, the beam.
Inlay a thickness in the inside of the first half of rotor 17 and be 5～6 millimeters lead and be with 19, play the outwards effects of emission of fan-ray beam 23 that stop.The narrow seam 13 of backscattering ray slit 2 and transmitted ray is arranged in lead and is with, and its quantity is generally 2～3 and is advisable.
Transmitted ray bundle detector 8 adopts the dual energy detector of a linear array, can substantially distinguish the atomic number of being picked up object, ability with X ray of rough measure different-energy is used for measuring the X ray of tested object transmission, can help to distinguish that to be picked up object be light or heavy object.Also be provided with transmitted ray detector shield 10 and an optoisolator 14 on the dual energy detector of linear array, optoisolator is to improve image resolution ratio, prevents mutual interference.
Principle of work of the present utility model is as follows: x-ray source 1 is emitted ray, behind 12 collimations of collimating apparatus before the ray, form fan-shaped flat flat fire wire harness through fan ray beam collimator 3, form flying-spot scanner beam 18(Fig. 1 of a lip pencil by a backscattering ray slit 2 on the rotor 17 of ray tube 9), penetrate through ray slit secondary collimator 15 and to be straight line relative motion B(and to see Fig. 1) tested object 4 on, ray is penetrated on tested object along rectilinear direction, form backscattering ray 16, arrive backscattering ray detector 5, this detector is recorded that the information of backscattering ray of being picked up object, gathered by backscattering information acquisition system 21, then send into Computer Processing and display system 7 is processed, can obtain the backscattering image of tested object.When rotation garden bucket 17 rotates to the narrow seam 13 of another transmitted ray, the part fan-ray beam is passed, form a dynamic fan-ray beam 23(such as Fig. 2), after the 11 same corrections through ray secondary collimator 15 of transmitted ray bundle, the tested object 4 of directive, picked up the information of object with transmission, arrive transmitted beam ray detector 8, this transmitted beam ray detector is measured the information that ray penetrates tested object, gathered by transmitted ray information acquisition system 22, send into computer information processing and display system 7 is processed, consist of transmission image.When object 4 was picked up in 18 scannings of flying-spot scanner beam, transmitted ray bundle 11 does not scan was picked up object.When object was picked up in 11 scannings of transmitted ray bundle, flying-spot scanner beam 18 does not scan was picked up object.Both do not interfere with each other.
The transmitted beam ray detector adopts the dual energy detector of a linear array, ray shoots is longer to the time that quilt is picked up object, the time that is mapped on the transmitted ray detector 8 is also longer, because each detector obtains the irradiation of long period, can obtain larger transmission signal, the internal information of the tested object that process computer information processing and display system just can be moved more accurately, thus the transmission scan image obtained.
When backscattering is measured, still have the part ray to penetrate to be picked up object to arrive transmitted beam ray detector 8, but this transmitted beam ray detector do not work, each is taken charge of its duty and is not interfere with each other.Information demonstrates two images through acquisition process, one width of cloth is anti-(back of the body) dispersion image, one width of cloth is transmission image, as long as the translational speed (as: cylinder rotating speed: picked up the thing translational speed :) of adjusting the rotating speed of drum and being picked up thing just can obtain the image that quality is satisfied with.Two width of cloth image control test judge that meeting more effectively the contraband detecting of having a mind to hide out.
Claims (5)
1. the Combined type safety detector of an X ray backscattering and transmission, this safety detector comprise collimating apparatus (12) before an x-ray source (1), the beam, fan ray beam collimator (3), rotor (17), backscattering ray detector (5) and computer information processing and display system (7); Collimating apparatus (12) and fan ray beam collimator (3) are arranged in the rotor before described x-ray source (1), the beam, and are provided with backscattering ray slit (2) at rotor; Described backscattering ray detector (5) and x-ray source are positioned at the same side of object to be detected (4), it is characterized in that: on rotor, also be provided with the narrow seam of transmitted ray (13), the narrow seam of described transmitted ray (13) and backscattering ray slit (2) on rotor along even circumferential and alternate layout, backscattering ray slit (2) is parallel to the cylindrical shell generatrix direction and arranges that the narrow seam of transmitted ray (13) is arranged perpendicular to the cylindrical shell generatrix direction; X ray produces respectively flying-spot scanner beam (18) and transmitted ray bundle (11) by two kinds of different slits; The direction of aiming at the transmitted ray bundle at the opposite side of object to be detected (4) is equipped with a transmitted ray bundle detector (8); The center line of collimating apparatus (12), fan ray beam collimator (3), the narrow seam of transmitted ray (13) and transmitted ray bundle detector (8) is positioned on the central plane of fan-ray beam (23) before described x-ray source (1), the beam; Backscattering ray slit (2) perpendicular to the central plane of fan-ray beam and with this Plane intersects.
2. the Combined type safety detector of a kind of X ray backscattering as claimed in claim 1 and transmission, it is characterized in that: described backscattering ray detector (5) is that the detector by two rectangular shapes consists of, the detector of two rectangular shapes adopts up and down arrangement, in the middle of two detectors up and down, leave the gaps of 1.5～2.0cm, be provided with a ray slit secondary collimator (15) at this gap location, on the central plane that is centered close to fan-ray beam of this ray slit secondary collimator.
3. the Combined type safety detector of a kind of X ray backscattering as claimed in claim 1 or 2 and transmission, it is characterized in that: the narrow seam of described transmitted ray (13) and backscattering ray slit (2) all adopt 2～3.
4. the Combined type safety detector of a kind of X ray backscattering as claimed in claim 2 and transmission is characterized in that: be equipped with a backscattering ray detector alpha ray shield body (6) at each rectangle detector.
5. the Combined type safety detector of a kind of X ray backscattering as claimed in claim 1 and transmission, it is characterized in that: described transmitted ray bundle detector (8) adopts the dual energy detector of a linear array, is provided with transmitted ray detector shield (10) and an optoisolator (14) at this detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220229823 CN202854352U (en) | 2012-05-21 | 2012-05-21 | X-ray backscattering and transmission combined type safety detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220229823 CN202854352U (en) | 2012-05-21 | 2012-05-21 | X-ray backscattering and transmission combined type safety detector |
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| CN202854352U true CN202854352U (en) | 2013-04-03 |
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| CN 201220229823 Expired - Lifetime CN202854352U (en) | 2012-05-21 | 2012-05-21 | X-ray backscattering and transmission combined type safety detector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707324A (en) * | 2012-05-21 | 2012-10-03 | 貊梁 | Backscatter and transmission combined safety detector of X rays |
| CN104764759A (en) * | 2015-04-01 | 2015-07-08 | 中国原子能科学研究院 | Jumper flying-spot scanning device for X-ray backscatter imaging system |
| WO2020093232A1 (en) * | 2018-11-06 | 2020-05-14 | Shenzhen Xpectvision Technology Co., Ltd. | A Backscatter X-ray System |
| CN111657989A (en) * | 2020-07-09 | 2020-09-15 | 汕头市超声仪器研究所有限公司 | Method for reducing radiation of X-ray detection environment from receiving end |
| CN113552643A (en) * | 2021-09-06 | 2021-10-26 | 山东医工健康科技有限公司 | Flying spot scanning device for X-ray source |
-
2012
- 2012-05-21 CN CN 201220229823 patent/CN202854352U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707324A (en) * | 2012-05-21 | 2012-10-03 | 貊梁 | Backscatter and transmission combined safety detector of X rays |
| CN102707324B (en) * | 2012-05-21 | 2015-01-21 | 貊梁 | Backscatter and transmission combined safety detector of X rays |
| CN104764759A (en) * | 2015-04-01 | 2015-07-08 | 中国原子能科学研究院 | Jumper flying-spot scanning device for X-ray backscatter imaging system |
| CN104764759B (en) * | 2015-04-01 | 2017-11-21 | 中国原子能科学研究院 | A kind of wire jumper flying spot scanning device for X ray back scattering imaging system |
| WO2020093232A1 (en) * | 2018-11-06 | 2020-05-14 | Shenzhen Xpectvision Technology Co., Ltd. | A Backscatter X-ray System |
| CN111657989A (en) * | 2020-07-09 | 2020-09-15 | 汕头市超声仪器研究所有限公司 | Method for reducing radiation of X-ray detection environment from receiving end |
| CN113552643A (en) * | 2021-09-06 | 2021-10-26 | 山东医工健康科技有限公司 | Flying spot scanning device for X-ray source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20150121 |
|
| RGAV | Abandon patent right to avoid regrant |