CN1142609A - Nondestructive testing method and apparatus and its application mobile gamma digital radiation imaging - Google Patents
Nondestructive testing method and apparatus and its application mobile gamma digital radiation imaging Download PDFInfo
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Abstract
A non-destructive inspection method by gamma-ray radiation digital imaging is composed of radiation source, front and back collimator, array detector, and signal and image processing unit, all of which are installed on a rigid structure. Under the action of driver, the whole apparatus can move to scan object, or it is stationary but the object to be inspected move through radiation region for scanning. The objects to be inspected may be container, train, truck, missile, mechanical part, pressure container, etc.
Description
The present invention relates to a kind of gamma digital radiation imaging lossless detection method and device thereof, more particularly, the invention particularly relates to a kind of mobile gamma digital radiation imaging lossless detection method and device and uses thereof, be used to check the inner case of objects such as container, lorry, guided missile, small-sized parts, belong to the Application of Nuclear Technology field.
The digital radiation imaging container pick-up unit of existing various models (being called for short " pick-up unit " later on), as described in the product information and Chinese patent ZL93102728.4 of French Shi Lunbeixie company, German Heyman company, British Aerospace PLC, all use electron accelerator (electrostatic accelerator or linear accelerator) to do its sigmatron source, equipment is huge, heavy, radiation intensity is very high, all must be fixedly mounted on operation in the thick and heavy shielding protection building.This type of quickens the type pick-up unit can satisfy the requirement of searching for smugglers and smuggling goods of customs, but has following defective:
1. pick-up unit is a stationary installation, scans when detecting, and must have special tractor to make tested object pass through irradiated region by the desired sweep velocity that possesses certain precision.The weight of van container lorry can reach about 50 tons.Required tractor is wanted accurately, stably to drag great object like this, and its technical difficulty and price are all very high, and easy break-down, often are main weak links that influences the overall operation reliability.When tested object very long, very heavy (as the permutation railway freight-car), its tractor will more be difficult to realize.
2. the radiation intensity in the used radiation from machine of pick-up unit source is very high, and the barrier shield thickness at the main position of protective construction reaches more than 2 meters.In addition, because the high energy X radiation that used accelerator produced is not an isotropy, the subtended angle of used irradiation field is generally about 30 °, thereby for making irradiation field can contain tested objects such as container carrier, and the distance of used array detector and accelerator target will be at a distance of ten meters with far.Therefore, the required floor area of building of this class device is very big, needs bigger service floor area toward contact.
3. used accelerator needs special operation personnel, and maintenance, maintenance work amount are very big, and price is high.
In real work, need more that radiation intensity is low, shielding is simple and easy, floor area is little, the operations staff is few, cheap, and accuracy of detection and the sweep velocity pick-up unit that still can meet the demands.Many needs are arranged, and for example the container of inspection stacking dispersion or permutation railway freight-car etc. more are difficult to be satisfied by this acceleration type pick-up unit that is fixed in the thick and heavy protective construction.
The mobile gamma digital radiation imaging lossless detection method and device and the effect thereof that the object of the present invention is to provide a kind of single unit system that can satisfy actual needs to move easily, settle.
Another object of the present invention is to provide the gamma digital radiation imaging lossless detection method and device and uses thereof that a kind of radiation intensity is low, shielding is simple and easy, cheap.
Describe content of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation front elevation of mobile gamma digital radiation imaging the cannot-harm-detection device of the present invention.
Fig. 2 is the structural representation vertical view of mobile gamma digital radiation imaging the cannot-harm-detection device of the present invention.
Fig. 3 is the structural representation of the another kind of embodiment of pick-up unit of the present invention.
Fig. 4 is that radiation source and preceding collimating apparatus platform of living in upright position are higher, does not have the supplemental support wheel, and then collimating apparatus and detector array are the structural representation of the pick-up unit of double clear form.
Fig. 5 is the structure diagram of collimating apparatus and detector array behind the arc line type.
Fig. 6 is the structure diagram of collimating apparatus and detector array after the upright shape.
Fig. 7 is the pick-up unit synoptic diagram that is used to detect the permutation railway freight-car.
Identical parts are represented with the label of usefulness mutually among the figure.
First aspect of the present invention relates to a kind of mobile gamma digital radiation imaging lossless detection method.This method is that pick-up unit is arranged on the rigid frame, one be installed on the rigid frame or be attached thereto the driving mechanism that connects drive whole device do before and after scanning motion, perhaps, rigid frame maintains static, and tested object below it or the tractor that is attached thereto drag, pass irradiated region in the rigid frame do before and after scanning motion.Meanwhile, received by detector array after the beam,gamma-ray that is collimated into sheet that gamma emitter sends passes tested object, thereby realization is to the Non-Destructive Testing of tested object.
The gamma emitter that adopts in the said method is
60Co,
137Cs,
192High specific activity gamma activity isotope radiation sources such as Ir.
Above-mentioned driving mechanism drives rigid frame according to instruction and moves with respect to translation scan before and after the tested object work along track, thereby finishes the Non-Destructive Testing to whole tested object.Above-mentioned tractor according to instruction drag tested object pass irradiated region in the rigid frame make it to do with respect to rigid frame before and after the translation scan motion, thereby finish Non-Destructive Testing to whole tested object.When finding suspicious situation, can make driving mechanism or tractor its speed that slows down return check, so that further check judgement meticulously.
Second aspect of the present invention relates to a kind of mobile gamma digital radiation imaging the cannot-harm-detection device.
Referring to Fig. 1, Fig. 2, pick-up unit of the present invention is by being installed in high specific activity gamma emitter on the same movably rigid frame 3 and container 1 thereof, detector array 5, preceding collimating apparatus 2, back collimating apparatus 4, signal and image processing unit 6 and being installed on the rigid frame or coupled driving mechanism 7 is formed.The both sides of rigid frame 3 are respectively arranged with 1 # platform 10 and 2# platform 11, gamma emitter and container 1 thereof and preceding collimating apparatus 2 are arranged on the 1# platform 10, back collimating apparatus 4, detector array 5, signal and image processing unit 6 and driving mechanism 7 are arranged on the 2# platform 11 of opposite side, thereby have formed a detection zone.Tested object 8 is arranged in the rigid frame 3, is placed on the placement table 9.The following of 1# platform 10 supported by supplemental support wheel 12, has two rows to drive BOGEY WHEELs 13 below the 2# platform 11, and this BOGEY WHEEL 13 is arranged on the track 14, and translation scan move before and after can doing along track.Driving mechanism 7 drives BOGEY WHEEL 13 by instruction, makes the rigid frame 3 that pick-up unit has been installed do translation scan motion by aspect, front and back (shown in arrow among Fig. 2) with certain speed along track 14.Supplemental support wheel 12 below the 1# platform 10 can be assisted the weight of bearing gamma emitter and container 1 and preceding collimating apparatus 2, helps the stability of shaped as frame rigid frame 3 motions.Supplemental support wheel 12 can have track, rolls and directly drop on the ground grading.
Fig. 3 has showed the another kind of embodiment of pick-up unit of the present invention.Tested object 8 is arranged on the tractor 17, is used for dragging tested object and does front and back translation scan motion with respect to pick-up unit.Be provided with several Height Adjustable support components 16 below 1# platform 10 and the 2# platform 11, be used to install and fix whole detection device.Above-mentioned support component 16 can be hydraulic mechanism, mechanical elevating mechanism etc.Tractor 17 can drag tested object by instruction and do front and back translation scan motion with respect to pick-up unit with certain speed.
Gamma emitter adopts high specific activity
60Co,
137Cs,
192Gamma activity isotope radiation sources such as Ir, the active region dimension is several millimeters, activity is for counting Curie to hundreds of Curie (1 * 10
11～3 * 1C
13Becquerel).For large-scale tested objects such as containers, should select for use energy of high
60The Co radiation source.For the less object of mass thickness, can select the lower radioactive isotope radiation source of energy of for use.The specific activity of gamma activity isotope radiation source of the present invention and range-of-motion and industrial flaw detection conform to substantially with gamma emitter, and the existing a large amount of approved product supplies of the latter.Pick-up unit of the present invention can adopt this type of industrial flaw detection γ source that carries cask flask, thereby has increased whole device reliability of operation, has significantly reduced cost simultaneously.
Before collimating apparatus 2 be to make by metal such as lead, iron or its alloy, closely connect with the gamma emitter container.Before collimating slit in the middle of the collimating apparatus gamma-rays that radiation source is launched to be collimated into horizontal subtended angle be 0.1 ° to 1 ° and the vertical direction subtended angle reaches the sheet beam of tens of degree.
Back collimating apparatus 4 is also made by metals such as lead, iron and alloy thereof.It is fixedly mounted on the shaped as frame rigid frame, and the width of the collimating slit in the middle of it equals or be slightly larger than the pixel width of detector array 5, and strictly aims at the collimating slit of preceding collimating apparatus 2 and the active region of radiation source.For making each detector unit little with the distance difference of gamma emitter, single broken line shape that back collimating apparatus 4 should be as shown in fig. 1, wherein the height basically identical of the length of upstanding portion and tested object.
When the upright position of 1# platform 10 not simultaneously, the shape of back collimating apparatus 4 is also wanted corresponding change, but need to keep all the time be geometric center with the radiation source active region basically.
In some cases, need to improve the position of radiation source.For the sheet beam that contains tested object is all received by detector array, make each detector unit little simultaneously to the distance difference of radiation source, it is linear that collimating apparatus 4 is designed to two-fold after special the general, wherein, and the height basically identical of the length of upstanding portion and tested object.As shown in Figure 4, the height adjustment mechanism among the figure 15 can be in order to regulate the vertical height of 1# platform 10.Back collimating apparatus 4 can also be designed to camber line shape, as shown in Figure 5.The another kind of embodiment of back collimating apparatus 4 is upright shape structures, as shown in Figure 6.Collimating apparatus helps to improve the detection condition after the camber line shape, but can increase difficulty aspect processing, raises the cost.
The effect of detector array 5 is to convert electric signal to passing the gamma-rays of injecting its sensitive volume behind the tested object, again the electric signal of feed-in back and image processing unit.Require its detection efficiency and charge sensitivity height, and reliable and stable, can bear vibrations in the scanning process and relatively poor environmental baseline.The existing adoptable detector array that may satisfy these requirements has multiple, " gas-ionization high energy x, γ radiation imageable array detecting device ", proportional chamber, proportional counter or Geiger pipe array, scintillation detector array or semiconductor detector array etc. that for example Chinese patent ZL93102728.4 set forth.
Comprise whole analog quantity treatment circuits such as front-end circuit, analog to digital conversion (ADC) circuit and part or all of digital circuit and the computing machine accepting detector output signal and amplify in electric signal and the image processing unit 6.Operating personnel and computing machine etc. can all be placed on the 2# platform 11 simultaneously, together move with rigid frame 3, detect the object inner case in real time, and in time take corresponding measure, also can be placed on the outer appropriate position of certain distance, finish same work but do not move with rigid frame 3.In the former case, to set up necessary operating personnel's protective equipment on the 2# platform 11, as lead, iron shield barrier etc.
Steady for rigid frame 3 is moved, and can adapt to the situation of cancelling supplemental support wheel 12, whole rigid frame should drop between two row's driving BOGEY WHEELs 13 together with the center of gravity of each unit of pick-up unit that is installed on it.For this reason, can on 2# platform 11, add some weights in case of necessity and be used as balance weight body usefulness.This balance weight body also can just be designed to operating personnel's protective barrier.
Be installed on the 2# platform 11 of rigid frame 3 or be attached thereto the drive unit 7 that connects and comprise the enough big motor of power, internal combustion engine or other power machine and control gear and gear train etc.It can make rigid frame 3 together with the pick-up unit that is installed on it by instruction, by certain rate request, does the scanning motion of front and rear direction along track.
Placement table 9 is used for being shelved on actionless tested object 8 in the testing process.It can be simple horse structure, be convenient to tested object is placed on it or remove.It also can attach one group of gear train of carrying tested object 8, but the effect of this gear train only is to place or shift out tested object, and in testing process and be failure to actuate, does not more have the requirement of speed and speed stability aspect, is easy.
Tested object 8 can be a large object, also small-sized object.Large object is meant container, container carrier, train carriage, guided missile even can is the permutation train.Fig. 7 shows is the situation of tested object when being the permutation train.Tested train steady is motionless among the figure, is to be finished by train braking device and need not placement table 9.During detection, drive pick-up unit integral body by driving mechanism 7 and move with respect to translation scan before and after the train work along track 14.Small-sized object is meant bent axle, cylinder body, fin, foundry goods, forging, element part, priming system and parts thereof or pressure vessel and parts thereof etc.
When tested object was large object, translation scan motion before and after tested object transfixion, pick-up unit integral body are done with respect to tested object was as Fig. 1, Fig. 2 and shown in Figure 7.When tested object is a small-sized object or when being easy to drag, pick-up unit can maintain static, by tractor 17 drag tested object pass irradiation fields in the rigid frame 3 do before and after the translation scans motion, as shown in Figure 3.
The 3rd aspect of the present invention relates to the purposes of above-mentioned mobile gamma digital radiation imaging the cannot-harm-detection device.This device can be used for detecting large object and small-sized object.This device is arranged at ground such as port, border, customs land route, harbour, airport, traffic main artery, railway, the inner case that is used for large objects such as detected set vanning, container carrier, train carriage, lorry even permutation train is searched smuggling, is violated a ban, the situation of dangerous, mistake containment and transport of objects.Also this device can be arranged at the places such as assembly yard of guided missile, beast, be used to detect the inner case of large objects such as guided missile, beast, abnormal occurrencies such as identification loading error.
It is little and require the high industrial nondestructive testing field of accuracy of detection that pick-up unit of the present invention can also be applied to the object volume, be used to detect the inner case of small-sized objects such as bent axle, cylinder body, fin, foundry goods, forging, element part, priming system and parts thereof, pressure vessel and parts thereof, so that check defectives such as finding its inner shrinkage cavity, slag inclusion, crack.Can on production line, carry out continuous on-line Non-Destructive Testing work.
The course of work of pick-up unit of the present invention is as follows:
The gamma-rays that gamma emitter sends is put through preceding standard and is passed tested object 8 after device 2 is collimated into the sheet beam, again through after inject the sensitive volume of each detector unit of detector array 5 behind collimating apparatus 4 collimation.The output signal of each detector unit is directly proportional with the gamma intensity that its position receives, and herein gamma intensity and ray walk on the path relevant through the receptivity (being mass thickness) of tested object 8 corresponding sites.The output signal of each the road detector unit that is obtained in the sampling time is collected, handled, and arrange according to the order of sequence, show, the scanning of image line of quality distribution situation in computer screen obtains one deck object that a reflection sheet beam in vertical direction passed just.Along with the relative translation scanning motion between pick-up unit and tested object, the sheet beam,gamma-ray will be by scanning motion direction each position of scanned tested object successively successively, " the scanning of image line " one by one of reflection subject internal soundness distribution situation shows order, finally obtains the two-dimentional gamma digital radiation projection image of tested object.Use various computer image processings, can carry out the amplification of local window, gray scale window and the adjusting of pseudo-colours window etc. this image, thus the thin portion of view image different levels, and testing result can be write down, files or exports.
In pick-up unit of the present invention, tested object 8 generally is actionless in the scanning testing process, and does scanning motion by the pick-up unit that is installed on the rigid frame 3 along track 14.Speed of related movement between this moment tested object 8 and the pick-up unit is decided by the instruction of being accepted by the driving mechanism 7 of (or be attached thereto connect) on the rigid frame 3 fully.By radiation statistic fluctuation theory as can be known, under the identical situation of radiation source activity and other condition, scanning motion speed is slow more, and the statistic fluctuation of the data that collect is more little, thereby gained gamma digital radiation projection image is clear more.Check in sweep velocity routinely if find doubtful point, can to make pick-up unit underspeed in the process of object 8, multiple scanning is lived at the place in the Suspected Area, to realize meticulousr detection.
After whole testing processes of a tested object 8 finished, actionless object was removed during detection, and changes to new tested object, carried out next round scanning testing process.So repeat, detect continuously always.
Under very long, the big situation of this tested object of picture permutation railway freight-car, pick-up unit of the present invention will move on the parallel orbit that is arranged at the train next door, serially the permutation lorry be scanned detection.The gamma digital radiation projection image that respectively saves railway carriage that obtains can in time be differentiated, handle, and also can store earlier to observe, or being transferred to a certain inspection center unifies observation and handle again.
In some cases, for example tested object is less or be easy to drag, rigid frame 3 and on detection system can be fixed on transfixion on a certain position by its support component, and make tested object when detecting, move (as shown in Figure 3) by the certain speed requirement, can obtain the gamma digital radiation projection image of tested object equally.
" movable type " of mobile gamma digital radiation imaging the cannot-harm-detection device of the present invention not only shows in the testing process it generally is to do scanning motion by detection system, and shows that whole detection device is easy to carry, move to the place that needs and goes operation.Because pick-up unit only is to be layed in the track on ground 14, placement table 9, supplemental support to take turns 12 required ground gradings and general safeguard procedures etc. to the requirement of complementary conditions, and only several tons of the weight of whole detection device, therefore thisly can and be easy to realize with moving by the carrying of demand between the different location.
When whole electric signal and image processing unit 6 and operating personnel were placed on the 2# platform 11, all detection and signal Processing and deterministic process all realized on rigid frame 3 and finish.When operating personnel and image show that when not being placed on the 2# platform 11 with process computer etc., the monitoring that is positioned in appropriate position is indoor, and this can make operating personnel and computing machine have better working environment.
Embodiment:
Embodiments of the invention are a kind of mobile gamma digital radiation imaging the cannot-harm-detection device that is mainly used in container or container carrier detection
It is that hundreds of Curie are (less than 2 * 10 that this device adopts activity
13Becquerel) high specific activity
60The Co radiation source, the horizontal subtended angle of its collimation beam is little 1 °, and heavy Nogata is about 60 ° to subtended angle.Preceding collimating apparatus is plumbous system, and back collimating apparatus is iron.The detector array of having selected for use Chinese patent ZL93102728.4 to be set forth.Adopt the front-end circuit of DC operation pattern and the analog-digital converter circuit of the above precision of 12bit.Carry out signal and image processing by high end microcomputer.The sweep velocity of its rigid frame is 10～30 cels.The detection performance index that this embodiment reached will be: the density contrast sensitivity (CI value) to 100 millimeters iron shield absorbers will be better than 1.5%, and the image quality index (IQI value) under the same absorber condition will be 3～4.5%; Penetrating power (SP value) then can reach 200 millimeters iron.This can reasonably well satisfy customs's requirements of one's work of searching for smugglers and smuggling goods.The higher value in the radiation source range-of-motion is given in selection, and These parameters will further improve.The CI value can be less than 1%, and the IQI value will be less than 3%, and the scanning detection speed then can reach 30 cels.
Characteristics of the present invention are:
The industrial γ flaw detection source of 1. adopting was exactly to design, make for using in industry spot originally Make, its just can guarantee its safely running on the place in the open with the barrier propterty of cask flask. Thus, checkout gear of the present invention does not need thick and heavy protective construction, is easy to ensure radiation safety, and And also can operate at the open area that is provided with certain fence coverage.
2. adopt by detection system and do scanning motion, and the static different detecting pattern of tested object, This is particularly conducive to the Non-Destructive Testing of heaviness, length, big, tested object that inconvenience drags. This can the province Unloading lotus, will to reach tens of ton above and require the huge, complicated of certain translational speed and velocity accuracy Drive motor-driven. This will significantly reduce the cost of checkout gear, and improve reliability standard.
3. the weight of whole detection device is only several tons, and desired external condition mainly is the facility that track and ground grading etc. are easy to realize, thereby it can carry, shift, be arranged to the place that needs easily and go running, and needn't all transport to a fixing pick-up unit location, somewhere to all tested objects.This place that relatively disperses for container stackings such as harbours is very favourable.
4. owing to do not need very thick and heavy radiation protection building and huge actuator, the auxiliary place that this will significantly reduce needed floor area of building and will take.
5. since adopt in light weight, volume is little, the gamma activity isotope radiation source of the maintenance that do not need repairing substantially replaces and costs an arm and a leg and needs are equipped with special operation, keep in repair the accelerator of troop, thereby will significantly reduce the price of pick-up unit of the present invention and needed operation and maintenance personal's number.
In summary it can be seen that pick-up unit of the present invention will be a kind of movable type, shield simple and easy, operate reliably, gamma digital radiation imaging the cannot-harm-detection device of cheap and easy operating.Its price will only be the part of quickening the type pick-up unit, even 1/10th.This is very favourable to applying.
Claims (18)
1. gamma digital radiation imaging lossless detection method, it is characterized in that pick-up unit is arranged on the rigid frame, one is installed on the rigid frame or the front and back translation scan motion of the whole device do of coupled drive mechanism, perhaps, rigid frame is maintained static, below the tested object or the tractor that is attached thereto drag tested object pass irradiated region do before and after the translation scan motion, simultaneously, received by detector array after the beam,gamma-ray that is collimated into sheet that gamma emitter sends passes tested object, thereby realization is to the Non-Destructive Testing of tested object.
2. the method for claim 1 is characterized in that above-mentioned radiation source is
60Co,
137Cs, or
192Ir high specific activity gamma activity isotope radiation source.
3. the method for claim 1 is characterized in that above-mentioned driving mechanism and tractor drive rigid frame according to instruction or drags tested object to do forward and backward translation scan motion.
4. mobile gamma digital radiation imaging the cannot-harm-detection device, comprise gamma emitter and container thereof, preceding collimating apparatus, back collimating apparatus, detector array, electric signal and image processing unit and tractor, it is characterized in that this device also comprises rigid frame and driving mechanism thereof, gamma emitter and container thereof, preceding collimating apparatus, back collimating apparatus, detector array, electric signal and image processing unit and driving mechanism are fixedly mounted on the same rigid frame, and gamma emitter and container thereof and preceding collimating apparatus, back collimating apparatus is separately positioned on the 1# platform and 2# platform of the relative both sides of rigid frame with image processing unit with detector array and electric signal thereof, to form a detection zone.
5. device as claimed in claim 4 is characterized in that above-mentioned radiation source is a high specific activity gamma activity isotope source.
6. as claim 4 and 5 described devices, it is characterized in that above-mentioned radiation source is
60Co,
137Cs, or
192Ir.
7. device as claimed in claim 4, it is characterized in that above-mentioned before collimating apparatus and back collimating apparatus make by plumbous, iron or its alloy.
8. device as claimed in claim 4, it is characterized in that detector array is array for ionization chamber, proportional chamber, proportional counter or Geiger pipe array, scintillation detector array or semiconductor detector array, is made up of a plurality of probe unit series arrangement that comprise some detectors unit.
9. device as claimed in claim 4 is characterized in that above-mentioned back collimating apparatus is upright shape, single broken line shape, two-fold is linear or camber line shape, and above-mentioned detector array will be complementary with above-mentioned back collimating apparatus.
10. device as claimed in claim 4 is characterized in that being provided with below the above-mentioned 1# platform supplemental support wheel, has the load-bearing driving wheel below the above-mentioned 2# platform.
11. device as claimed in claim 4 is characterized in that also being provided with below above-mentioned 1# platform and the 2# platform support component of the whole rigid frame of fixed support.
12. device as claimed in claim 4 is characterized in that the part of above-said current signal and image processing unit is fixedly mounted on the above-mentioned rigid frame, remainder is arranged on the appropriate position apart from the rigid frame certain distance.
13. device as claimed in claim 4, it is characterized in that above-mentioned driving mechanism according to instruction drive the tested relatively object of whole rigid frame do before and after the translation scan motion, above-mentioned tractor according to instruction drag tested object pass irradiated region in the rigid frame do before and after the translation scan motion.
14. device as claimed in claim 4 is characterized in that the span of above-mentioned rigid frame and height should be greater than the width and height of tested object.
15. device as claimed in claim 4 is characterized in that above-mentioned rigid frame is provided with highly to regulate parts, to regulate the vertical height of 1# platform.
16. the purposes of gamma digital radiation imaging the cannot-harm-detection device is characterized in that with this device large object or small-sized object being carried out the Non-Destructive Testing of γ radiation digital imaging.
17. purposes as claimed in claim 16 is characterized in that above-mentioned large object is container, container carrier, railroad car, lorry, guided missile or permutation train.
18. purposes as claimed in claim 16 is characterized in that above-mentioned small-sized object is bent axle, cylinder body, fin, foundry goods, forging, element part, priming system and parts thereof or pressure vessel and parts thereof.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102080 CN1051616C (en) | 1996-03-06 | 1996-03-06 | Nondestructive testing method and apparatus and its application mobile gamma digital radiation imaging |
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|---|---|---|---|
| CN 96102080 CN1051616C (en) | 1996-03-06 | 1996-03-06 | Nondestructive testing method and apparatus and its application mobile gamma digital radiation imaging |
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| CN1142609A true CN1142609A (en) | 1997-02-12 |
| CN1051616C CN1051616C (en) | 2000-04-19 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007900A1 (en) * | 1999-07-23 | 2001-02-01 | Tsinghua University | A digital radiation photographic detection system for large object |
| CN1292961C (en) * | 2002-01-07 | 2007-01-03 | 北京清大科技股份有限公司 | On-line detector for regular pieces inside product packing box |
| US7460639B2 (en) | 2004-09-30 | 2008-12-02 | S.C. Mb Telecom Ltd.-S.R.L. | Nonintrusive inspection method and system |
| CN101183082B (en) * | 2007-12-14 | 2011-08-17 | 清华大学 | Ship radiation image-forming detecting system |
| CN103913474A (en) * | 2014-03-27 | 2014-07-09 | 桂林市南方检测有限责任公司 | Steel large vertical storage tank X ray automatic detection equipment |
| CN111071497A (en) * | 2019-12-31 | 2020-04-28 | 中国科学院空间应用工程与技术中心 | Steel belt driving mechanism for optical inspection outside material cabin and exposure platform |
| CN112666622A (en) * | 2019-10-16 | 2021-04-16 | 同方威视技术股份有限公司 | Radiation scanning inspection apparatus |
| CN115793079A (en) * | 2021-09-09 | 2023-03-14 | 同方威视技术股份有限公司 | Radiation inspection apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1160557C (en) * | 2001-09-03 | 2004-08-04 | 北京埃索特核电子机械有限公司 | Equipment of cobalt 60 gamma ray source-cesium iodide or cadmium tungstate detector for checking container |
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1996
- 1996-03-06 CN CN 96102080 patent/CN1051616C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007900A1 (en) * | 1999-07-23 | 2001-02-01 | Tsinghua University | A digital radiation photographic detection system for large object |
| GB2368764A (en) * | 1999-07-23 | 2002-05-08 | Univ Tsinghua | A digital radiation photographic detection system for large object |
| GB2368764B (en) * | 1999-07-23 | 2004-02-18 | Univ Tsinghua | Digital radiography inspection apparatus for large object |
| CN1292961C (en) * | 2002-01-07 | 2007-01-03 | 北京清大科技股份有限公司 | On-line detector for regular pieces inside product packing box |
| US7460639B2 (en) | 2004-09-30 | 2008-12-02 | S.C. Mb Telecom Ltd.-S.R.L. | Nonintrusive inspection method and system |
| CN101183082B (en) * | 2007-12-14 | 2011-08-17 | 清华大学 | Ship radiation image-forming detecting system |
| CN103913474A (en) * | 2014-03-27 | 2014-07-09 | 桂林市南方检测有限责任公司 | Steel large vertical storage tank X ray automatic detection equipment |
| CN112666622A (en) * | 2019-10-16 | 2021-04-16 | 同方威视技术股份有限公司 | Radiation scanning inspection apparatus |
| CN112666622B (en) * | 2019-10-16 | 2024-02-02 | 同方威视技术股份有限公司 | Radiation scanning inspection apparatus |
| CN111071497A (en) * | 2019-12-31 | 2020-04-28 | 中国科学院空间应用工程与技术中心 | Steel belt driving mechanism for optical inspection outside material cabin and exposure platform |
| CN115793079A (en) * | 2021-09-09 | 2023-03-14 | 同方威视技术股份有限公司 | Radiation inspection apparatus |
| CN115793079B (en) * | 2021-09-09 | 2024-04-09 | 同方威视技术股份有限公司 | Radiation inspection device |
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