CN2645079Y - Backscattering X-ray scanner - Google Patents
Backscattering X-ray scanner Download PDFInfo
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- CN2645079Y CN2645079Y CN 03276443 CN03276443U CN2645079Y CN 2645079 Y CN2645079 Y CN 2645079Y CN 03276443 CN03276443 CN 03276443 CN 03276443 U CN03276443 U CN 03276443U CN 2645079 Y CN2645079 Y CN 2645079Y
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Abstract
The utility model provides an X-ray backscattering scanner, in particular to a backscattering flying-spot ray scanning detecting device. The utility model adopts low energy X-ray and flying-spot linear scanning. The utility model is technically characterized in that the flying-spot ray generator adopts a rotatable cylinder-shape linear flying-spot scanning structure with 1 to 4 circular or square keyholes uniformly dig on the same circumference, and a lead or other heavy metal shielding layer is painted in the inner wall of the cylinder. The X-ray source and a sector collimator are both arranged in the cylinder. The utility model provides a special detector. The device has low scattering radiation and small damage to human bodies, and is simple in structure and easy to manufacture. The special detector can spot and scan the scattering radiation in any time and at any place. The utility model has the advantages of high efficiency, easy shielding and automatic noise elimination, and a large solid angle of the detector towards the scattering spots, no needing of an array collimator or an array detector and other advantages. The utility model can be used not only in the body scanning but also in the security detection of military, industrial radiography and other fields.
Description
Technical field
The utility model relates to a kind of backscattering formula ray scanning pick-up unit, relates in particular to a kind of backscattering formula X-ray scanning instrument, belongs to social safety inspection and safety precaution technical field of measuring equipment.
Background technology
Backscattering formula ray scanner is to utilize the ray shoots information that backscattering is returned on object to measure processing, and then calculates the image of interior species distribution on this inspected object top layer and a kind of device of information.The social safety that this device can be airport, station, various office building, large halls and guest houses provides safeguard.The radiographic source of this kind device can adopt isotope or X ray.Have plenty of during scanning and use flat bundles scanning, flying-spot scanner is also arranged.Its principle of work is as shown in Figure 1: ray tube 1 is emitted ray, by preceding collimating apparatus 2 collimations is a flat fan incoming beam 3, penetrate and doing on the tested object 4 of straight line relative motion, form one scan line 5, ray forms scattered ray 6 in the other direction along sweep trace on tested object, through detector collimating apparatus 7, reach and the ray detector 8 of radiographic source in the same side, detector measurement has arrived scattered ray, just can obtain the top layer situation image of tested object through computer information processing.China's utility application (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 influences resolution, and general isotope gamma ray projector energy is bigger, 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 (change as per minute several thousand) when requiring sweep velocity fast, because rotation slit body weight is big, its operation can be under some influence.In addition, what the utility model adopted is gamma-rays, and the general radiation energy is big, and the backscattering cross section is little, bigger to injury of human.Present many in the world famous research institutions, the specialized vendor drops into great amount of manpower and material resources, financial resources, researches and develops more high precision and still less damages human body, easier universal use and more economical safety detection instrument simultaneously; Wherein the digital X-ray scanning device of low radiation dose, high definition then more is subjected to people's favor.Chinese patent application " multifunctional industrial X-ray imaging system " (application number is 99113199) employing dish dress flying-spot scanner technology, it is to process specific custom-designed slit on the plate of a rotation, to do relative motion with another shaft collar with slit, the scanning that just can guarantee the bar-shaped X-ray beam that produces continuously and evenly, this is a complexity and the work of difficulty.Therefore cause equipment complexity, fabrication and processing difficulty; Add again and must draw a taper beam on plate from X-ray tube, could draw a bar-shaped X-ray beam from the opposite side of shaft collar, the X-ray beam amount of drawing like this is big, and the chance that produces spuious X ray is just many, and is just complicated to shielding requirements.
The utility model content
The purpose of this utility model provides a kind of low radiation dose, high definition, has the manufacturing handling ease simultaneously, and the backscattering formula X-ray scanning instrument low to shielding requirements is used for the particularly inner case of human body surface of scanning object surface.
The technical solution of the utility model is as follows: a kind of backscattering formula X-ray scanning instrument, mainly comprise x-ray source, flying spot beam generator, be arranged on the fan-shaped collimating apparatus of x-ray source front, detector and signals collecting and disposal system, described x-ray source, flying spot beam generator, fan-shaped collimating apparatus, detector places the same side of tested object, it is characterized in that: described flying spot beam generator adopts a rotatable round barrel shape straight line flying-spot scanner structure, evenly has 1～4 circle or square aperture on the same circumference of drum, and its inboard studs with lead or heavy metal shield layer; Described x-ray source and fan-shaped collimating apparatus all are arranged in the drum.
Detector described in the utility model is to be separately positioned on by scintillation counter, two to put before the photomultiplier at scintillation counter two ends, be connected with two photomultipliers respectively two and wave-shaping circuit, link to each other with the output terminal of wave-shaping circuit respectively two are fixed constitutes than discriminator circuit and with two fixed coincidence circuits that link to each other than the output terminal of discriminator circuit.
Another technical characterictic of the present utility model is: described device also comprises a collimating apparatus that is coated on described detector top, and this collimating apparatus adopts 3～5 millimeters stereotype to make.
The utility model also is equipped with the detector of a band collimating apparatus on the direction of the opposite side aligning beam of tested object.
The utility model compared with prior art has the following advantages and the high-lighting effect: the utility model adopts the low energy X ray source, and is little to injury of human; Flying spot beam generator adopts round barrel shape flying spot rectilinear scanning structure simultaneously, only need beat several apertures thereon, therefore is easy to processing and manufacturing, and is simple in structure, reliable; Because energy is low, bucket is inboard, and only need inlay very thin stereotype (3 millimeter) is enough to reduce an X ray 2-3 magnitude of 150 kilovolts; And, make equipment simple with X-ray production apparatus, high-voltage power supply, collimating apparatus and flying spot beam generator integrator, be easy to install.The utility model has also adopted special-purpose detector, utilize its scattered radiation of spotting scaming any time, anywhere at any time, have efficient height, easily shielding, denoising voluntarily, the solid angle that scattering point is opened is big, does not need characteristics such as array collimation device and detector array; The picture information that it can provide the backscattering ray becomes time series order numerical information completely, has saved the requirement to pin hole shape collimating apparatus and sensor array.The utility model not only can be used for body scans, also can be used for the safety detection of industry (flaw detection), military aspects such as (mine detections).
Description of drawings
Fig. 1 is the principle assumption diagram of backscattering formula ray scanner in the prior art.
The principle assumption diagram of the backscattering formula X-ray scanning instrument that Fig. 2 provides for the utility model.
Fig. 3 connects block diagram for the hardware of the sensor special that the utility model provides.
Fig. 4 is the structural representation of the utility model embodiment.
The structural representation of another embodiment that Fig. 5 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
The backscattering formula X-ray scanning instrument that the utility model provides mainly comprises x-ray source, flying spot beam generator 9, fan-shaped collimating apparatus 2, detector 8 and sensor 17.X-ray source is made up of X-ray tube 1, high-voltage power supply 15 and cable 16, and they and fan-shaped collimating apparatus 2 all are placed in the drum 9.Be provided with 1～4 square or circular aperture 10 on the same circumference of drum 9, the size of aperture generally between 1～5 millimeter, is inlaid with the stereotype of 3 millimeter as screen layer in the inboard of drum.Its principle of work is: drum 9 is around X-ray tube 1, fan-shaped collimating apparatus 2 moves in a circle, aperture 10 is also done same motion and is produced bar-shaped beam 11, bar-shaped beam is beaten and is being done on the tested object 4 of linear relative movement with drum, form sweep trace 5 on tested object 4, the reflection back forms backscattering ray 6.Inject special-purpose detector 8, detector is noted the scanning sequence signal of backscattering, forms scan time series object top layer situation digital signal, enters the top layer image that can obtain tested object 4 after the Computer Processing then.
The utility model is different from general flying-spot scanner, and it is to beat some specific apertures 10 on the same circumference of a drum, and the motion in these holes has a simple and specific circuit orbit.When drum during around radiographic source 1 rotation, ray at first is collimated into a fladellum 3 through fan-shaped collimating apparatus 2, passes aperture 10 and impinges upon and form flying spot (bar-shaped X-ray beam 11) on the tested object 4.The size of flying spot is decided by resolution requirement, and its track is a straight line 5 on tested object, tested object is done the simple motion of rectilinear scanning.
Employed detector 8 adopts special-purpose detector in the utility model, and its structure as shown in Figure 3.Described detector is to be separately positioned on by a scintillation counter, two to put before the photomultiplier at scintillation counter two ends, be connected with two photomultipliers respectively two and wave-shaping circuit, link to each other with the output terminal of wave-shaping circuit respectively two are fixed constitutes than discriminator circuit and with two fixed coincidence circuits that link to each other than the output terminal of discriminator circuit.Its principle of work is as follows: X ray is injected scintillation counter (inorganic crystal scintillator is counted device or plastic scintillant, liquid scintillator etc.) and is produced light signal, two photomultipliers about light signal is injected respectively convert electric impulse signal to through photomultiplier and amplify; After screening, meeting, send into computer interface.Through this detector, have only the signal that arrives two photomultipliers simultaneously just to be recorded, thereby reduced the background noise of device.Utilize its scattered radiation of spotting scaming any time, arbitrfary point at any time; And data aggregation is simple, can Direct Digitalization without conversion; The solid angle that it has the efficient height, open scattering point is big, does not need characteristics such as array collimation device and detector array.The utility model can be a purpose to increase sensitivity according to actual conditions also, adopt a plurality of this detectors or change this detector shape can be cylindric also can be flat or other Any shape.
Embodiment of the present utility model has also used special-purpose collimating apparatus 17 (as shown in Figure 4), and this collimating apparatus is a device that is coated on the described detector 8, adopts 3～5 millimeters stereotype to make.Its shape can adopt semicircle or other shape, is used to shield the ray of non-backscattering, further reaches the collimation effect.
The structural representation of the another kind of embodiment that Fig. 5 provides for the utility model, it is to aim at the detector 8 of having adorned a band collimating apparatus 17 on the direction of penetrating bar-shaped beam 11 again at the opposite side of tested object 4, be used to obtain the X ray transmission image.
The radiographic source that the utility model adopts can be 200KeV following various types of low-energy X, gamma ray projector.
Claims (4)
1. backscattering formula X-ray scanning instrument, mainly comprise x-ray source, flying spot beam generator, be arranged on the fan-shaped collimating apparatus of x-ray source front, detector and signals collecting and disposal system, described x-ray source (1), flying spot beam generator (9), fan-shaped collimating apparatus (2), detector (8) places the same side of tested object (4), it is characterized in that: described flying spot beam generator adopts a rotatable round barrel shape straight line flying-spot scanner structure, evenly has 1～4 circle or square aperture (10) on the same circumference of drum, and its inboard studs with lead or heavy metal shield layer; Described x-ray source and fan-shaped collimating apparatus all are arranged in the drum.
2. according to the described ray scanner of claim 1, it is characterized in that: described detector (8) is to be separately positioned on by scintillation counter, two to put before the photomultiplier at scintillation counter two ends, be connected with two photomultipliers respectively two and wave-shaping circuit, link to each other with the output terminal of wave-shaping circuit respectively two are fixed constitutes than discriminator circuit and with two fixed coincidence circuits that link to each other than the output terminal of discriminator circuit.
3. according to the described ray scanner of claim 1, it is characterized in that: this scanner also comprises a collimating apparatus (17) that is coated on described detector top, and this collimating apparatus adopts 3～5 millimeters stereotype to make.
4. according to the described X-ray scanning instrument of the arbitrary claim of claim 1～3, it is characterized in that: aim at the detector (8) that a band collimating apparatus (17) also is housed on the direction of beam at the opposite side of tested object (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03276443 CN2645079Y (en) | 2003-08-22 | 2003-08-22 | Backscattering X-ray scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03276443 CN2645079Y (en) | 2003-08-22 | 2003-08-22 | Backscattering X-ray scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2645079Y true CN2645079Y (en) | 2004-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03276443 Expired - Lifetime CN2645079Y (en) | 2003-08-22 | 2003-08-22 | Backscattering X-ray scanner |
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| CN (1) | CN2645079Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680501A (en) * | 2012-05-26 | 2012-09-19 | 中国人民解放军信息工程大学 | Collimation system for X-ray backscatter scanner |
| RU2507507C1 (en) * | 2009-12-30 | 2014-02-20 | Ньюктек Компани Лимитед | Scanning device using radiation beam for backscattering imaging and method thereof |
| RU2532495C1 (en) * | 2010-12-31 | 2014-11-10 | Ньюктек Компани Лимитед | Scanning device and method for imaging with back-scattered radiation beam |
| RU2545095C1 (en) * | 2012-10-24 | 2015-03-27 | Ньюктек Компани Лимитед | Beam-emitting device and imaging system having said device |
| RU2554311C1 (en) * | 2012-12-27 | 2015-06-27 | Ньюктек Компани Лимитед | Backscatter-based inspection systems and methods for human body |
| CN105158282A (en) * | 2015-10-23 | 2015-12-16 | 中国原子能科学研究院 | Scanning device used for back-scattering imaging system |
| CN108461369A (en) * | 2018-05-10 | 2018-08-28 | 同方威视技术股份有限公司 | Two point beam scanning X-ray emitter |
-
2003
- 2003-08-22 CN CN 03276443 patent/CN2645079Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2507507C1 (en) * | 2009-12-30 | 2014-02-20 | Ньюктек Компани Лимитед | Scanning device using radiation beam for backscattering imaging and method thereof |
| RU2532495C1 (en) * | 2010-12-31 | 2014-11-10 | Ньюктек Компани Лимитед | Scanning device and method for imaging with back-scattered radiation beam |
| CN102680501A (en) * | 2012-05-26 | 2012-09-19 | 中国人民解放军信息工程大学 | Collimation system for X-ray backscatter scanner |
| CN102680501B (en) * | 2012-05-26 | 2013-11-20 | 中国人民解放军信息工程大学 | Collimation system for X-ray backscatter scanner |
| RU2545095C1 (en) * | 2012-10-24 | 2015-03-27 | Ньюктек Компани Лимитед | Beam-emitting device and imaging system having said device |
| RU2554311C1 (en) * | 2012-12-27 | 2015-06-27 | Ньюктек Компани Лимитед | Backscatter-based inspection systems and methods for human body |
| CN105158282A (en) * | 2015-10-23 | 2015-12-16 | 中国原子能科学研究院 | Scanning device used for back-scattering imaging system |
| CN105158282B (en) * | 2015-10-23 | 2018-05-22 | 中国原子能科学研究院 | A kind of scanning means for back scattering imaging system |
| CN108461369A (en) * | 2018-05-10 | 2018-08-28 | 同方威视技术股份有限公司 | Two point beam scanning X-ray emitter |
| CN108461369B (en) * | 2018-05-10 | 2024-03-12 | 同方威视技术股份有限公司 | Dual spot beam scanning X-ray generator |
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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 |
Effective date of abandoning: 20050622 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |