CN1039664C - Self-scan type radiation detection system for large body - Google Patents
Self-scan type radiation detection system for large body Download PDFInfo
- Publication number
- CN1039664C CN1039664C CN 95103044 CN95103044A CN1039664C CN 1039664 C CN1039664 C CN 1039664C CN 95103044 CN95103044 CN 95103044 CN 95103044 A CN95103044 A CN 95103044A CN 1039664 C CN1039664 C CN 1039664C
- Authority
- CN
- China
- Prior art keywords
- tower
- collimating
- radiation source
- track
- scanning gantry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The present invention relates to a self-scanned radiation detecting system for a large object, which comprises a radiation source, a collimating tower, a detecting tower, a track and a scanning gantry, wherein the radiation source is arranged on the track to move reciprocally, and the collimating and the detecting tower are arranged on the other group of tracks, are provided together with the radiation source, and are driven by a servo motor to move synchronously. The large object to be detected is arranged between a collimating tower track and a detecting tower track, and a ray from the radiation source passes through the collimating tower, penetrates through a shipping container, and then enters an array detector of the detecting tower; the detector absorbs the ray and outputs an electric charge which is transmitted to an image work station after converted into a digital code. The system has the advantages of little space occupation, low cost, indoor installation and easy maintenance.
Description
The present invention relates to a kind of self-scan type radiation detection system for large body, belong to the radiation checking technical field.
For under the situation of not unpacking, checking the goods in the container, begin the beginning of the nineties to have the drawing type container examination system to come out.Ordered two cover van container detection systems from German Heyman company (Heimann) and British Aerospace PLC (BritishAerospace) respectively in 1992 as Chinese Kowloon customs, be loaded on Shenzhen Wen Jin respectively and sail across a sea and close and emperor hilllock customs, tried out at present.Its ultimate principle as shown in Figure 1, in a building can shield the sense channel of ray, fixed, as to produce high energy X-ray radiation source S is housed and can receives the detector array D of the X-ray that passes container, the vehicle (driver is from car) that special-purpose dragging system will be equipped with container dragged sense channel, when container passes through in beam, the transmitted intensity that arrives detector through container changes, the Density Distribution of the object of adorning in the reflection case, special transmitted intensity is transformed into ganmma controller, can obtain the fluoroscopy image of the object of adorning in the case.
Van container reaches 20 meters, connects its transport vehicle up to 4 meters, and is wide 2.5 meters, weighs 50 tons.The system of above-mentioned Britain opens a motor-driven platform trailer that reaches more than 20 meter to the vehicle that is loaded with container earlier when detecting, the driver is from car.The anti-door that expands of the ray of open detection feeder connection then, motor-driven platform trailer is sent container car into sense channel, the anti-door that expands of closing passage.Platform trailer starts subsequently, accelerates to required speed and the X-ray by having opened.Just demonstrate the fluoroscopy image of the thing of freighting in the container on the display.Full car by after close the X-ray, motor-driven flat-bed trailer slows down up to stopping.Open the sect then, container car is hauled out passage, the driver gets on the bus and drives away.From above-mentioned detection principle as can be known, sense channel length is wanted 60 meters at least, and each 40 meters at least of length are taken up an area of at outside two ends.Motor-driven flat-bed trailer also must be got back to inlet through returning rail.For reaching the speed that detected a car container car in two, three minutes, need the circular flow of three motor-driven massive plate cars.Be a very huge dragging system, floor area is equivalent to a football field.Only dragging system just must cost nearly 1,500 ten thousand yuan with relevant buildings.And the system of the indoor outer operation of this kind is out of order easily, and maintenance cost reaches 1,000,000 yuan every year.
The objective of the invention is to design a kind of self-scan type radiation detection system for large body, testee is placed in the system, make the relative testee of radiation source make reciprocating cutter with detection system, to reach testing goal, thereby reduce to detect the place greatly, reduce the detection system cost, and system is in indoorly, is easy to safeguard.
The self-scan type radiation detection system for large body of the present invention's design comprises radiation source, collimating tower detection tower, radiation source orbit, collimating tower track, surveys tower track and scanning gantry.Radiation source places on the radiation source orbit, and collimating tower places on the collimating tower track, surveys tower and places on the detection tower track, and scanning gantry is supported and surveyed tower and collimating tower.Testee places to be surveyed between tower track and the collimating tower track, the same moved further of radiation source and scanning gantry.One collimating slit is arranged on the collimating tower, and surveying on the tower also has a collimating slit and detector array one signal processor plug-in unit is arranged.
Description of drawings:
Fig. 1 is the prior art synoptic diagram.
The floor plan of the detection system that Fig. 2-the 1st, the present invention design.
Fig. 2-the 2nd, the front elevation of detection system.
Fig. 3-1,3-2,3-3 are respectively front elevation, side view and the vertical views of the detection tower in the detection system.
Fig. 4-1 and Fig. 4-2 is respectively the front elevation and the vertical view of the collimating tower in the detection system.
Fig. 5-1 and Fig. 5-2 is respectively the front elevation and the vertical view of the used light-duty electron linear accelerator structure of the present invention.
Fig. 6 is the embodiment of detector one signal processor in this detection system.
Fig. 7 is a laser contraposition synoptic diagram.
Fig. 8 is the another kind of floor plan of detection system.
Below in conjunction with accompanying drawing, introduce content of the present invention in detail.
Fig. 2-1 and Fig. 2 the-the 2nd, the structural representation of detection system.Among the figure, the 1st, sense channel inlet, the 2nd, inlet protective door, the 3rd, collimating tower track, the 4th, radiation source orbit, the 5th, radiation source, the 6th, high energy x ray (turn-offing when opening the door), the 7th, outlet protective door, the 8th, sense channel outlet, the 9th, collimating tower, the 10th, scanning gantry, the 11st, survey tower, the 12nd, survey the tower track, the 13rd, tested container, the 14th, fender wall.
Above-mentioned whole parts are installed in the buildings of Fig. 2.The left side is heavily about 2.5 tons detection tower 11 in scanning gantry 10, is made up of the ray collimator (being called the back collimating apparatus) that six, seven meters high detector arrays and lead alloy are done, and the right is a collimating tower 9, is preceding collimating apparatus; All the other are steel construction piece.The right is the radiation source 5 that can produce ray among Fig. 2.Ray behind the transmission container, enters detector array by the back collimator slit by the preceding collimator slit of collimating tower 9.Forward and backward collimating apparatus makes the ray of direct projection container enter detector and stop the interference of scattered ray to image.Detector absorbs ray and output charge is transformed into number by signal processing circuit, is transferred to visual workstation.During detection, after closing ray, the protective door that the open detection passage is imported and exported.The vehicle that is loaded with container is directly opened into sense channel, and the driver gets off and leaves sense channel, closes the protective door that sense channel is imported and exported, and opens ray then.Radiation source and scanning gantry same moved further, scan containers and obtain the fluoroscopy image of object in the case voluntarily.Detection finishes, and turn-offs ray, opens the sect, and the driver drives away car.Hence one can see that, and the present invention only need build 30 meters long sense channels.20 meters of buildings width that comprise scanning system.
Fig. 3-1,3-2,3-3 are the structural representations of surveying tower.Among the figure, the 31st, the back collimating apparatus that the lead alloy piece is done is the back collimating slit between two alloy blocks, the 32nd, insulating support, the 33rd, detector one signal processor plug-in unit, the 34th, survey the tower structure steel.Fig. 4-1,4-2 are the inner structure synoptic diagram of collimating tower.Among the figure, the 41st, the preceding collimating apparatus that the lead alloy piece is done is preceding collimating slit between two alloy blocks, the 42nd, the collimating tower structural steel.
The present invention adopts a cover to make the system of radiation source 5 and scanning gantry 10 synchronous scannings, adopt multinomial state-of-the-art technology again, making the general assembly (TW) at radiation source and scanning gantry only is about 4.5 tons, and the split synchronous scanning system of employing numerical control driving and laser mask contraposition, scanning becomes possibility thereby make voluntarily.And all indoor sport, Mechatronic Systems is easy to accomplish precision, reliable.
Radiation source in the system of the present invention adopts the mobile light electron linear accelerator.Its structure is shown in Fig. 5-1 and 5-2.51 is resident wave accelerating pipes among the figure, the 52nd, and electron gun, the 53rd, waveguide, the 54th, the microwave magnetron source, the 55th, modulator, the 56th, focusing coil, the 57th, target, the 58th, plumbous awl slit collimator, the 59th, the collimating apparatus support, the 60th, shockproof platform, 60 ' is the accelerating tube support.Resident wave accelerating pipe 51 just can accelerate to the electronics that electron gun 52 sends 6 MeVs in tens centimetres accelerating length, and it is strong to have bigger stream.Accelerating power is injected accelerating tube with pulse mode through waveguide 53 by modulator 55 modulation microwave magnetron pools 54.The electronics that also focus on through focusing coil 57 after the acceleration enter target chamber bombardment tungsten target 57, and the X ray of generation becomes vertical fan-shaped fasciculus gracilis ejaculation by the slit of lead awl collimating apparatus 58.Roentgen dose X can reach 800 rad/decimetres, and radiation source weight is no more than 300 kilograms, and has designed anti-shock system, and displacement can reach 100 meters.When detection speed was less demanding, radiation source also can adopt radioactive isotope, and weight also only is about 200 kilograms.
Detector in the system can adopt various types of detector arrays.Light and handy " scintillator-photodiode one custom IC " integrated total solids detector array and signal processing system can alleviate the weight of surveying tower, and the general assembly (TW) of this detector array and signal processing system is no more than 300 kilograms.Its structure as shown in Figure 6.Among the figure, the 61st, the scintillation detector crystal, the 62nd, photodiode, the 63rd, analogue signal processor, 64 is 16 to select 1 analog multichannel switch, 65 is 16 analog digital converters, the 66th, scrambler and bus interface.
The solid detector array is made card format, and a plug-in unit comprises 16 or more a plurality of scintillation crystal 61 and photodiode 62, and ray transmitted intensity of excited fluorescent intensity and incident in scintillation crystal is directly proportional.Photodiode becomes electric charge with fluorescence conversion, is transformed into signal voltage by 16 channel signal processors 63 again, and the shape of going forward side by side sampling keeps.Multi-way switch 64 is selected and recommended analog-to-digital converter 65 with the voltage of 16 paths successively and is transformed into number, and these digital encoded device 66 codings form an image to being produced behind the container scanning that is listed as after bus is sent to visual workstation.
The present invention has adopted advanced Numeric Control Technology, and scanning gantry is seated on four tracks that the standard rolling body is housed; Survey tower and collimating tower respectively by the servomotor transmission, digital control system guarantee they synchronously, 0.2mm of every step of regulated quantity can reach in 1m after the starting ± 5% at the uniform velocity, vibration amplitude is less than 0.2mm.Radiation source is placed on the carrying platform of damping, and carrying platform is driven by servo-drive system, on slide rail, move, and with scanning gantry strict synchronism.
In order when the initial contraposition and in the motion, to keep radiation source to aim at, used the visual technique of counterpoint of laser mask with detector.Its principle of work as shown in Figure 7,71 is laser instruments among the figure, the 72nd, image receiver.Laser instrument 71 a kind of mask images of emission (for example " ten " font pattern) on scanning gantry are to the CCD image receiver 72 of radiation source platform, during the occurrence positions deviation, " ten " font laser image that receives is with regard to the occurrence positions deviation, produce correcting code and give digital control system, keep the source point of radiation source and scanning gantry to aim at any time.
Isotope radiation source ray subtended angle is big, also can adopt the diagonal line transmission mode, and radiation source is contained in the right of scanning gantry collimating tower, and the self-scanning detection system structure of composition is compact especially, and as shown in Figure 8, parts label implication is identical with Fig. 2-1 among the figure.This system cost is lower, but the gained image is fan-shaped projection, and in kind with visual size is far and near different because of the distance radiation source.Yet the cost of this system can drop to below 1/3 of existing system, and is still very suitable to the user who has.
Claims (2)
1. self-scan type radiation detection system for large body, comprise radiation source, collimating tower, detection tower, it is characterized in that this system comprises that also radiation source orbit, collimating tower track, detection tower track and scanning gantry, described radiation source place on the radiation source orbit, collimating tower places on the collimating tower track, surveying tower surveys in surveying on the tower track, scanning gantry is supported and is surveyed tower and collimating tower, and testee places to be surveyed between tower track and the collimating tower track, the same moved further of radiation source and scanning gantry; One collimating slit is arranged on the collimating tower, and surveying on the tower has a collimating slit and detector array one signal processor plug-in unit is arranged;
Described radiation source is light-duty electron linear accelerator, this accelerator is made up of resident wave accelerating pipe, electron gun, waveguide, microwave magnetron source, modulator, focusing coil, target and plumbous awl slit collimator, electron gun sends electronics, quicken also to enter target chamber and bombard target after the focusing of line focus coil through resident wave accelerating pipe, the X ray of generation penetrates after boring slit collimator by lead; Described scanning gantry is provided with laser instrument, and the radiation source platform is provided with image receiver, and laser instrument emission image is received by image receiver, and when scanning gantry and radiation source occurrence positions deviation, receiver produces correcting code.
2. radiation detection system as claimed in claim 1, it is characterized in that wherein said detector one signal processor plug-in unit is scintillator one photodiode one custom IC, select 1 analog multichannel switch, 16 analog digital converters and scrambler and bus interface to form by scintillation detector crystal, photodiode, analogue signal processor, 16; Photodiode becomes electric charge with the fluorescence conversion that the scintillation detector crystal receives, do signal transformation and sampling maintenance by analogue signal processor, 16 select 1 analog multichannel switch that voltage signal is selected and recommended 16 analog digital converters, and encoded device of this number and bus interface are transferred to the visual workstation of Master Control Room by optical cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103044 CN1039664C (en) | 1995-03-31 | 1995-03-31 | Self-scan type radiation detection system for large body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103044 CN1039664C (en) | 1995-03-31 | 1995-03-31 | Self-scan type radiation detection system for large body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133440A CN1133440A (en) | 1996-10-16 |
| CN1039664C true CN1039664C (en) | 1998-09-02 |
Family
ID=5074574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95103044 Expired - Fee Related CN1039664C (en) | 1995-03-31 | 1995-03-31 | Self-scan type radiation detection system for large body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039664C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003021243A1 (en) * | 2001-09-03 | 2003-03-13 | Beijing Isotope Nuclear Electronic Machin Co. Ltd. | A container inspection system using cobalt 60 gamma ray source and cesium iodide or cadmium tungstate array detector |
| CN1798970B (en) * | 2003-06-06 | 2011-06-08 | 瓦润医药系统公司 | Vehicle mounted inspection systems and methods |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1185482C (en) * | 2001-08-14 | 2005-01-19 | 清华大学 | Aeronautical container/tray article examination system |
| CN102087364B (en) * | 2009-12-04 | 2013-06-19 | 中国辐射防护研究院 | Equipment and method for detecting static sensitivity and false alarm rate of gate-type radiation monitor |
| CN102565094B (en) * | 2010-12-23 | 2014-11-05 | 中国核动力研究设计院 | Nondestructive inspection equipment of casting |
| CN103529060B (en) * | 2012-07-04 | 2015-11-25 | 同方威视技术股份有限公司 | For the gantry structure of combination moving type radiation checking system |
| CN103336017B (en) * | 2013-06-08 | 2016-02-03 | 原子高科股份有限公司 | A kind of scanning mobile device for tower fault detect |
| CN103529480B (en) * | 2013-10-12 | 2017-02-01 | 清华大学 | System and method for examining aircraft |
| CN104754848B (en) * | 2013-12-30 | 2017-12-08 | 同方威视技术股份有限公司 | X-ray generator and the radioscopy imaging system with the device |
| CN104634796B (en) * | 2014-12-11 | 2017-12-12 | 清华大学 | For container or vehicle inspection system to Barebone and alignment methods |
| CN107572139A (en) * | 2017-10-27 | 2018-01-12 | 山东蓝孚高能物理技术股份有限公司 | A kind of electronic acceleration tube pretreatment and storing unit |
| CN108760774A (en) * | 2018-03-20 | 2018-11-06 | 湘潭宏远电子科技有限公司 | A kind of line clogging status number detecting system |
-
1995
- 1995-03-31 CN CN 95103044 patent/CN1039664C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003021243A1 (en) * | 2001-09-03 | 2003-03-13 | Beijing Isotope Nuclear Electronic Machin Co. Ltd. | A container inspection system using cobalt 60 gamma ray source and cesium iodide or cadmium tungstate array detector |
| CN1798970B (en) * | 2003-06-06 | 2011-06-08 | 瓦润医药系统公司 | Vehicle mounted inspection systems and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1133440A (en) | 1996-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1039664C (en) | Self-scan type radiation detection system for large body | |
| US20210373192A1 (en) | High-Speed Security Inspection System | |
| EP0986745B1 (en) | Single beam photoneutron probe and x-ray imaging system for contraband detection and identification | |
| US7215737B2 (en) | Double-radiant-source framework for container detecting system | |
| CN1318841C (en) | X-ray backscatter mobile inspection van | |
| US6937692B2 (en) | Vehicle mounted inspection systems and methods | |
| CN1129775C (en) | Straddle inspection system | |
| US4817121A (en) | Apparatus for checking baggage with x-rays | |
| GB2420682A (en) | Shipping container inspection system with CT scanning function | |
| CA2102851C (en) | Body scanning system | |
| US10088595B2 (en) | Systems and methods for inspecting an aircraft | |
| US20080310591A1 (en) | Backscatter Inspection Portal | |
| CN104749198A (en) | Two-channel high-energy X-ray perspective imaging system | |
| CN109471152B (en) | Collimator device capable of automatically adjusting gamma ray flux and measuring system thereof | |
| WO2005111590A2 (en) | Non-intrusive inspection systems for large container screening and inspection | |
| Brabson et al. | A study of two prototype lead glass electromagnetic calorimeters | |
| CN107966460A (en) | Radiation checking system and radiation testing method | |
| CN2231422Y (en) | Self scanning large body radiation detecting equipment | |
| CN203941116U (en) | The sigmatron perspective imaging system of dual intensity/Double-visual angle | |
| CN106053499A (en) | X-ray examination system and method | |
| CN2384216Y (en) | Movable container detector | |
| CN1126703C (en) | In-site non-destructive container inspection equipment | |
| Iuliano | Event reconstruction and data analysis techniques for the SHiP experiment | |
| CN207816856U (en) | Radiation checking system | |
| Lane | Study of structure of nuclei with neutrons and nuclear data measurements for MFE. Progress report, September 1, 1979-August 31, 1980 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980902 Termination date: 20140331 |