CN113267518B - Ray imaging system and ray nondestructive testing equipment - Google Patents
Ray imaging system and ray nondestructive testing equipment Download PDFInfo
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- CN113267518B CN113267518B CN202110388678.1A CN202110388678A CN113267518B CN 113267518 B CN113267518 B CN 113267518B CN 202110388678 A CN202110388678 A CN 202110388678A CN 113267518 B CN113267518 B CN 113267518B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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Abstract
The invention relates to a ray imaging system and ray nondestructive testing equipment, which comprise a camera, an L-shaped camera bellows, a curvature-adjustable reflector and a conversion screen, wherein the two components move relatively and have U-shaped sections, the conversion screen is used for converting neutron images into visible light images, the camera is arranged at any opening of the camera bellows, the conversion screen is covered at the other opening of the camera bellows and is connected between the two components in a sliding manner, the reflector is arranged at the bent part of the camera bellows, the visual field of the camera bellows can be flexibly adjusted through the relative movement between the two components of the camera bellows, and the curvature-adjustable reflector is adopted, so that the reflector can completely reflect the visible light images of the visual fields of different camera bellows to the camera, different visual field requirements can be met, the flexibility is high, and the cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of ray nondestructive testing, in particular to a ray imaging system and ray nondestructive testing equipment.
Background
The ray nondestructive detection technology is characterized in that rays such as neutrons, X rays and gamma rays are used for irradiating a detected object, internal information of the detected object is obtained through variation of intensity of transmitted rays according to different structures and material compositions in the detected object or attenuation difference of the defects to the rays such as the neutrons, the X rays and the gamma rays, and the technology is widely applied to the fields of industry, scientific research and the like. The ray imaging system in the ray nondestructive testing technology is a device for recording the intensity information of the transmitted ray, and is a key component in the ray nondestructive testing technology.
The existing radiographic imaging system mostly adopts a fixed structure mode, different visual field requirements are difficult to meet, different dark boxes are required to be manufactured according to different visual fields, the radiographic cost is increased, and the radiographic flexibility is influenced.
Before the invention, a patent CN102243433B high-speed neutron camera device provides a translation stage capable of driving a lens and a high-speed CMOS camera to integrally move aiming at neutron photography, and the translation stage can respond to different view field requirements through the movement of the translation stage; patent CN109507719A "a fast neutron imaging system" has proposed two translation platforms of design in the camera bellows, and the one end of first translation platform is equipped with the reflector, and the other end is connected with the second translation platform, is equipped with the image detector who establishes in the reflector is relative on the second translation platform, realizes light path automatically regulated through two translation platforms of intelligent control, satisfies the imaging requirement of different field of vision scope. But two patent designs all adopt fixed camera bellows structural design, and when the camera position rose and realized less formation of image field of vision demand, required import light path became little, but fixed camera bellows structural design led to the import light path passageway to keep unchangeable at the maximum position, and the neutron will be revealed from light path passageway this moment and come in, and the camera receives the irradiation big, and then formation of image irradiation noise signal is big.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a ray imaging system and ray nondestructive testing equipment.
The technical scheme of the ray imaging system is as follows:
the digital neutron image conversion device comprises a camera, an L-shaped camera bellows with two relatively moving parts and U-shaped sections, a curvature-adjustable reflector and a conversion screen for converting neutron images into visible images, wherein the camera is arranged at any opening of the camera bellows, the conversion screen is covered at the other opening of the camera bellows and is connected between the two parts in a sliding manner, and the reflector is arranged at the bent part of the camera bellows.
The ray imaging system has the following beneficial effects:
the camera can flexibly adjust the visual field of the camera bellows through the relative movement between the two parts of the camera bellows, and the reflector with the adjustable curvature is adopted, so that the reflector can completely reflect the visible light images of the visual fields of different camera bellows to the camera, different visual field requirements can be met, the flexibility is strong, the cost is greatly reduced, and the requirement of the visual field range can be larger by adopting the reflector with a smaller size.
On the basis of the scheme, the ray imaging system can be further improved as follows.
Further, the camera device also comprises a fixed bottom plate for fixing the camera, the two parts of the camera bellows are respectively a fixed part and a movable part, the reflector is fixed at the bent part of the fixed part, and the fixed bottom plate is arranged at one end of the moving part or one end of the fixed part.
The device further comprises a control system and a relative movement assembly, wherein the fixed part and the moving part are connected through the relative movement assembly, and the control system is used for controlling the relative movement assembly so as to enable the fixed part and the moving part to move relatively.
And the control system is also used for adjusting the curvature of the reflector by controlling the automatic adjusting mechanism.
Further, the system comprises an image processing system, wherein the image processing system is used for receiving and processing the images shot by the camera.
Further, the reflecting mirror is a flexible reflecting mirror made by plating a reflecting film on a metal base.
Further, the camera is a CCD camera or a CMOS camera.
Further, a shield for providing protection is also included.
The beneficial effect of adopting the further scheme is that: the leakage of neutrons passing through a light path channel, namely a dark box, can be reduced, and further the irradiation noise is reduced.
The invention provides a ray nondestructive testing device, which comprises a ray imaging system.
Drawings
Fig. 1 is a schematic structural diagram of a radiation imaging system according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the relative movement of two parts of the camera bellows;
FIG. 3 is a schematic diagram of a conversion panel;
fig. 4 is a schematic configuration diagram of an adjustment mechanism for adjusting the curvature of the mirror.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a conversion screen; 10. a conversion screen threaded hole; 11. converting a screen guide rail; 2. a dark box; 20. a fixing member; 21. a moving member; 22. a slide rail; 3. a mirror; 30. an adjustment mechanism; 4. fixing the bottom plate; 5. a camera; 6. a lens; 7. a shield; 8. a control system; 9. an image processing system.
Detailed Description
Referring to fig. 1 to 4, a radiographic imaging system according to an embodiment of the present invention includes a camera 5, an L-shaped camera bellows 2 having two relatively movable members with u-shaped cross-sections, a curvature-adjustable reflector 3, and a conversion screen 1 for converting a neutron image into a visible light image, wherein the camera 5 is disposed at any opening of the camera bellows 2, the conversion screen 1 is disposed at another opening of the camera bellows 2, the conversion screen 1 is slidably connected between the two members, and the reflector 3 is disposed at a bent portion of the camera bellows 2.
The field of vision of camera bellows 2 can be adjusted in a flexible way through the relative movement between two parts of camera bellows 2, and adopt camber adjustable speculum 3, can ensure that speculum 3 can reflect the visible light image in the field of vision of camera bellows 2 of difference to camera 5 completely, can satisfy different field of vision demands, and the flexibility is strong, greatly the cost is reduced, and adopts the speculum 3 of smaller size just can obtain satisfying great field of vision scope demand.
The specific structure and implementation of the conversion panel 1 for converting a neutron image into a visible light image are known to those skilled in the art, and are not described herein.
The reflecting mirror 3 is a flexible reflecting mirror 3 formed by plating a reflecting film such as aluminum on a substrate such as ethylene terephthalate. The camera 5 is a high resolution camera 5 such as a CCD camera 5 or a CMOS camera 5, and the lens 6 of the camera 5 may be a fixed focal length or a variable focal length.
Wherein, the light path of the visible light image is as shown by the arrow in the camera bellows 2 in fig. 1, reflected to the camera 5 by the reflector 3, the orientation of the lens 6 of the camera 5 is set to receive the visible light image reflected by the reflector 3, it can be understood that, when two components of the camera bellows 2 move relatively, the size of the opening of the camera bellows 2 is changed, that is, the size of the field of view of the camera bellows 2 is changed, because the field of view of the camera bellows 2 is changed, the size of the visible light image entering the camera bellows 2 through the conversion screen 1 is also changed, at this time, by adjusting the curvature of the reflector 3, it can be ensured that the reflector 3 can completely reflect the visible light image in different fields of view of the camera bellows 2 to the camera 5, that is, the visible light image with different sizes can be reflected to the camera 5, and collected by the lens 6 of the camera 5, specifically:
for example, when the field of view of the camera bellows 2 is the smallest, the mirror 3 can be adjusted to be a flat mirror, and the visible light image in the field of view of the camera bellows 2 can be completely reflected to the camera 5, and when the field of view of the camera bellows 2 is the largest, the adjusting mechanism 23 adjusts the mirror 3 to be a convex mirror, and the curvature of the mirror 3 increases as the field of view of the camera bellows 2 becomes larger, so that the visible light image in the field of view of the camera bellows 2 can be completely reflected to the camera 5.
As shown in fig. 3, a conversion screen guide rail 11 and a conversion screen threaded hole 10 are provided on the conversion screen 1, a threaded hole adapted to the conversion screen threaded hole 10 is provided on the wall of an opening of any component of the camera bellows 2, and is fixed by an adaptive screw, a rod adapted to the conversion screen guide rail 11 is extended from one end of another component of the camera bellows 2, and when the field of view of the camera bellows 2 is adjusted, the rod slides along the conversion screen guide rail 11, and does not obstruct the field of view of the camera bellows 2.
Wherein the relative movement between the two parts of the camera bellows 2 is realized as follows: arranging a plurality of threaded holes on the two parts in an array manner, changing the alignment among the threaded holes, and then fixing the threaded holes by using screws so as to realize the relative movement between the two parts of the camera bellows 2;
the camera system further comprises a fixed bottom plate 4 for fixing the camera 5, the two parts of the camera bellows 2 are a fixed part 20 and a movable part 21 respectively, the reflector 3 is fixed at the bent part of the fixed part 20, and the fixed bottom plate 4 is arranged at one end of the movable part 21 or one end of the fixed part 20.
That is, when the fixed base plate 4 is provided at one end of the moving part 21, the camera 5 moves along with the moving part 21 when the moving part 21 moves, and when the fixed base plate 4 is provided at one end of the fixed part 20, the camera 5 does not move along with the moving part 21 when the moving part 21 moves.
The fixing base plate 4 can be a plastic plate or a metal plate, and the fixing between the fixing base plate and the camera 5 is known to those skilled in the art, and will not be described herein.
As shown in fig. 2, preferably, in the above technical solution, the apparatus further includes a control system 8 and a relative movement assembly, the fixed component 20 and the moving component 21 are connected by the relative movement assembly, and the control system 8 is configured to control the relative movement assembly so as to make the fixed component 20 and the moving component 21 perform relative movement.
Wherein, relative moving assembly specifically is as follows form:
1) The camera bellows 2 sliding rail 22 is arranged on the fixed part 20, the slideway adaptive to the camera bellows 2 sliding rail 22 is arranged on the movable part 21, the camera bellows 2 sliding rail 22 is embedded into the slideway, the movable part 21 is connected with the telescopic end of the electric hydraulic rod, and the control system 8 comprises software for controlling the telescopic end of the electric hydraulic rod to stretch, so that the fixed part 20 and the movable part 21 can move relatively;
2) Set up camera bellows 2 slide rail 22 on fixed part 20, set up the slide with camera bellows 2 slide rail 22 adaptation on movable part 21, with camera bellows 2 slide rail 22 embedding slide in, movable part 21 connects the slider of the straight line module of ball screw, including the software that the slider of controlling this ball screw straight line module carries out linear motion in control system 8, realize from this that fixed part 20 and movable part 21 carry out relative movement, wherein, can adopt the ball screw straight line module that the model is HYS 40.
It is to be understood that the above examples are illustrative of the relative movement assemblies and are not limited to the above two.
As shown in fig. 4, preferably, in the above technical solution, the mirror further includes a manual adjusting mechanism or an automatic adjusting mechanism for adjusting the curvature of the mirror 3, and the control system 8 is further configured to adjust the curvature of the mirror 3 by controlling the automatic adjusting mechanism.
That is, the adjusting mechanism 23 for adjusting the curvature of the reflector 3 includes a manual adjusting mechanism and an automatic adjusting mechanism, and both ends of the reflector 3 are slidably connected to both bent walls of the fixing member 20, specifically: the accessible is slotted on two walls of the bending of fixed part 20, then sets up respectively at the both ends of speculum 3 with the checkpost of groove adaptation etc. realize sliding connection through the cooperation between groove and the checkpost, wherein manual adjustment mechanism is following form:
1) The two ends of the reflector 3 are respectively connected with one end of a bolt, threaded holes matched with the bolts are formed in the two bent walls of the fixed part, the bolts extend out of the fixed part 20 through the threaded holes, and the two ends of the reflector 3 are driven to move by manually rotating the bolts, so that the curvature of the reflector 3 is adjusted;
2) The sliding connection between the slot and the clip is fixed at any time by a bolt fixing mode or other modes, for example, when the clip is a section of threaded plastic rod, the clip can be fixed by an adaptive nut.
Wherein, the automatic regulating mechanism is as follows:
1) The two ends of the reflector 3 are respectively connected with the telescopic end of one electric hydraulic rod, and the control system 8 realizes the adjustment of the curvature of the reflector 3 by automatically controlling the telescopic end of the electric hydraulic rod to stretch;
2) The two ends of the reflector 3 are respectively connected with the sliding blocks of the ball screw linear module, and the control system 8 realizes the adjustment of the curvature of the reflector 3 through automatically controlling the movement of the sliding blocks of the ball screw linear module.
It is to be understood that the above examples are illustrative of the manual adjustment mechanism and the automatic adjustment mechanism, and are not limited to the above.
Preferably, in the above technical solution, the image processing system 9 is further included, and the image processing system 9 is configured to receive and process the image captured by the camera 5, specifically, perform image transformation, image coding compression, image segmentation, image storage, image pair comparison, and other processing on the image captured by the camera 5.
Preferably, in the above technical solution, the shielding body 7 for providing protection is further included, which can reduce the leakage of neutrons through the optical path channel, that is, the dark box 2, and further reduce the irradiation noise, and the specific structure and the installation position of the shielding body 7 can be designed and adjusted according to the actual situation, for example, the shielding body 7 can be designed as follows: the position of the shield 7 can move along with the movement of the moving part of the dark box, which is not described herein, and the material of the shield 7 can be lead or polyethylene, etc.
In the following, a radiographic imaging system according to another embodiment is described, which includes a conversion screen 1, a camera bellows 2, a reflector 3, a fixed base plate 4, a camera 5 having a lens 6, a shield 7, a control system 8, and an image processing system 9.
The camera bellows 2 comprises a fixed part 20 and a movable part 21, the fixed part 20 is inverted L-shaped, the bottom of the horizontal section is open, the movable part is also inverted L-shaped, the top of the horizontal section and the rear of the vertical section are open, the horizontal section and the rear of the vertical section are nested outside the fixed part 20, the movable part 21 is assembled with the fixed part through a slide rail 22 to obtain the camera bellows 2 in L shape, the camera bellows 2 can be inverted L-shaped according to different placement positions, when the movable part 21 moves up and down through the slide rail 22, the multi-gear adjustment of the visual field of the camera bellows 2 in the vertical direction and the matching adjustment of a light path channel, namely the channel in the camera bellows 2 can be realized, meanwhile, the space below the camera bellows 2 can be adjusted, the shielding body 7 can also be flexibly adjusted along with the camera bellows 2, the shielding body 7 can be matched with a small light path channel, the leakage of neutrons through the light path channel is reduced, and the additional irradiation noise caused by the rising of the camera 5 is reduced.
The curvature-adjustable reflector 3 is arranged at the bending part of the fixed part 20 of the camera bellows 2, the curvature-adjustable reflector 3 with the curvature of the reflector 3 adjusted by the adjusting mechanism 23 adopts the flexible reflector 3 which is formed by plating a reflecting film on a thin metal substrate, when the visual field of the camera bellows 2 is changed, the linear distance between two ends of the reflector 3 is adjusted by the adjusting mechanism 23, so that the curvature of the reflector 3 is adjusted, the visual field of the camera bellows 2 is ensured to be completely reflected to the lens 6 of the camera 5 by the reflector 3, and the reflector 3 is adjusted to be a plane mirror under the minimum visual field; when the field of view requirement is increased, the adjusting mechanism 23 adjusts the reflector 3 into a convex mirror, the curvature of the reflector 3 is increased along with the increase of the field of view, so as to ensure that the reflector 3 completely reflects the field of view of the camera bellows 2 to the lens 6 of the camera 5, and the lens 6 collects optical signals for imaging to obtain an image.
There are two conversion screen screw holes 10 at conversion screen 1 top, set up the screw hole with conversion screen screw hole 10 adaptation on the open-ended wall of fixed part 20, realize conversion screen 1's fixed, there are two conversion screen guide rails 11 in conversion screen 1's bottom, conversion screen screw hole 10 on top links to each other with the left end of the fixed part 20 of camera bellows 2 promptly opening department, two guide rails of bottom supply can adjust camera bellows 2 moving part 21's left end and slide from top to bottom, PMKD 4 links to each other with the bottom of camera bellows 2's moving part 21, follow the removal of moving part 21 and remove. The lens 6 and the camera 5 are fixed on the fixed bottom plate 4 and used for collecting optical signals to image. The camera 5 is a high-resolution camera 5, which can be a CCD camera 5 or a CMOS camera 5; the lens 6 may be fixed focal length or variable focal length.
The control system 8 adopts, for example, labVIEW software program to respectively control the driving motor to drive the moving part 21 of the camera bellows 2 to move up and down along the slide rail 22 and control the driving motor to drive the screw rod to rotate so as to realize the adjustment of the reflector 3 and the shielding body 7.
The ray imaging system of the application has the following beneficial effects:
1) The camera bellows 2 adopts an adjustable structural design, the flexible adjustment of the structure of the camera bellows 2 and the shielding body 7 can be realized according to the visual field requirement, the small optical path channel is matched under the small visual field, the leakage of neutrons passing through the optical path channel is reduced, the extra irradiation caused by the rising of the position of the camera 5 is further reduced, and the irradiation noise is reduced.
2) By adopting the reflector 3 with adjustable curvature and the adjusting mechanism 23, the curvature of the reflector 3 can be adjusted to ensure that the reflector 3 reflects different camera bellows 2 visual fields to the lens 6 of the camera 5, thereby realizing the matching of the reflector 3 with smaller size and larger visual field range.
The ray nondestructive testing equipment comprises the ray imaging system in any embodiment, and the images obtained by the ray imaging system are used for detection and analysis.
In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A ray imaging system is characterized by comprising a camera, a U-shaped dark box, a curvature-adjustable reflector and a conversion screen, wherein the U-shaped dark box is provided with two parts which move relatively and have L-shaped sections;
also comprises a fixed bottom plate for fixing the camera, the two parts of the camera bellows are respectively a fixed part and a movable part, the reflector is fixed at the bent part of the fixed part, and the fixed bottom plate is arranged at one end of the moving part or one end of the fixed part;
the control system is used for controlling the relative movement assembly so as to enable the fixed part and the moved part to perform relative movement;
the control system is also used for adjusting the curvature of the reflector by controlling the automatic adjusting mechanism;
the reflector is a flexible reflector which is manufactured by plating a reflecting film on a metal substrate;
when the camera bellows is used for imaging the camera, the adjusting mechanism adjusts the reflector into a plane mirror so as to completely reflect the visible light image in the field of view of the camera bellows to the camera, and when the field of view of the camera bellows is maximum, the adjusting mechanism adjusts the reflector into a convex mirror so as to increase the curvature of the reflector along with the increase of the field of view of the camera bellows so as to completely reflect the visible light image in the field of view of the camera bellows to the camera.
2. A radiographic imaging system according to claim 1, further comprising an image processing system for receiving and processing images taken by the camera.
3. A radiographic imaging system according to claim 1, wherein the camera is a CCD camera or a CMOS camera.
4. A radiation imaging system according to claim 1, further comprising a shield for providing protection.
5. A non-destructive radiographic inspection apparatus comprising a radiographic imaging system as claimed in any one of claims 1 to 4.
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| RU99193U1 (en) * | 2010-06-08 | 2010-11-10 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт автоматики им. Н.Л. Духова" (ФГУП "ВНИИА") | MONITOR OF NEUTRAL RADIATION |
| CN109507719A (en) * | 2019-01-17 | 2019-03-22 | 中国科学院合肥物质科学研究院 | A kind of rapid neutron imaging system |
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| JP3561371B2 (en) * | 1996-05-29 | 2004-09-02 | 浜松ホトニクス株式会社 | Analysis equipment |
| CN2738735Y (en) * | 2004-10-22 | 2005-11-09 | 南京理工大学 | Visual-field-variable X-ray image intensifier |
| CN103123326A (en) * | 2011-11-18 | 2013-05-29 | 西安中科麦特电子技术设备有限公司 | X-ray detector |
| CN110057541A (en) * | 2019-04-12 | 2019-07-26 | 上海炬佑智能科技有限公司 | The spuious optical detection device of TOF camera and its detection method |
| CN111239795B (en) * | 2020-02-18 | 2021-11-05 | 西北核技术研究院 | Qianji based on knife edge type thick needle hole60Co-gamma radiation source image acquisition system and method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU99193U1 (en) * | 2010-06-08 | 2010-11-10 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт автоматики им. Н.Л. Духова" (ФГУП "ВНИИА") | MONITOR OF NEUTRAL RADIATION |
| CN109507719A (en) * | 2019-01-17 | 2019-03-22 | 中国科学院合肥物质科学研究院 | A kind of rapid neutron imaging system |
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