Ray source device and ray inspection system

Abstract

The embodiment of the invention provides a ray source device and a ray inspection system, and the device comprises a fixed platform (1); the movable platform (2) is movably arranged above the fixed platform (1) along a first direction (x); and the ray source (3) is arranged on the movable platform (2) and is configured to emit a ray beam, and the projection of the ray beam in the horizontal plane extends along a first direction (x).

Description

Technical Field

[0001] The present disclosure relates to the field of radiation detection technology, and in particular to a radiation source device and a radiation inspection system. Background Art

[0002] The radiographic inspection system can be used to perform radiographic inspection on cargo or other items in containers or vehicles. It includes a radiation source and a detector. The radiation source is used to emit radiation to pass through the inspected object, and the detector is used to receive the radiation beam for imaging. An inspection channel is formed between the radiation source and the detector for the inspected object to pass through. When passing through the inspection channel, the inspected object such as the container or vehicle passes through the radiation beam surface formed by the radiation, and the radiation beam continuously scans the inspected object such as the container or vehicle.

[0003] In current X-ray inspection systems, the distance between the X-ray source and the detector is generally fixed. When the heights of the objects being inspected vary greatly, different X-ray inspection systems need to be used for inspection, and the imaging quality cannot be adjusted. Summary of the invention

[0004] The present disclosure provides a radiation source device and a radiation inspection system, which can adapt to more inspection conditions.

[0005] A first aspect of the present disclosure provides a radiation source device, comprising:

[0006] Fixed platform;

[0007] A movable platform is movably disposed above the fixed platform along a first direction; and

[0008] The ray source is disposed on the movable platform and is configured to emit a ray beam, wherein a projection of the ray beam in a horizontal plane extends along a first direction.

[0009] In some embodiments, the radiation source device further comprises:

[0010] The guide mechanism is connected between the fixed platform and the movable platform and is configured to provide guidance for the movement of the movable platform.

[0011] In some embodiments, the guiding mechanism comprises:

[0012] At least two guide rails are spaced apart along a second direction, the guide rails extend along the first direction, and the second direction is perpendicular to the first direction;

[0013] At least two sliding members are matched with at least two guide rails in a one-to-one correspondence, and the sliding members can slide along the guide rails;

[0014] Wherein, the movable platform is connected with at least two sliding members.

[0015] In some embodiments, a reinforcement member is provided between one side of the guide rail along the second direction and the fixed platform, and a sliding member is provided on the other side of the guide rail along the second direction.

[0016] In some embodiments, in the second direction, the outermost sliding members are all connected to the outer side surface or the inner side surface of the corresponding guide rail.

[0017] In some embodiments, a groove is provided on the side of the guide rail, and the groove has a top wall and a bottom wall opposite to each other in the height direction, and the sliding member includes:

[0018] A connecting seat having a first wall and a second wall adjacent to each other, wherein the first wall is connected to the movable platform; and

[0019] The bearing is rotatably mounted on the second wall around its own axis, and the rotation axis extends along the second direction. The bearing is embedded in the groove and cooperates with the top wall and the bottom wall to achieve rolling.

[0020] In some embodiments, the groove has a side wall connected between the top wall and the bottom wall, a roller is provided in the central area of ​​the bearing, the rotation axis of the roller is consistent with the height direction, and the rolling surface of the roller protrudes from the end surface of the bearing and rolls along the side wall.

[0021] In some embodiments, the radiation source device further comprises:

[0022] The supporting component is arranged at the bottom of the fixed platform and is configured to support the fixed platform. The height of the supporting component is adjustable. In some embodiments,

[0023] The supporting member comprises a plurality of leg groups, the plurality of leg groups have different lengths, a leg group can be selectively installed at the bottom of the fixed platform, each leg group comprises a plurality of legs arranged at intervals, and the legs are detachably arranged; or

[0024] The supporting component comprises a plurality of legs arranged at intervals, and the length of each leg is adjustable.

[0025] In some embodiments, the height of the support component is configured so that the main beam height of the radiation beam corresponds to a middle region of the object to be inspected along the height direction.

[0026] In some embodiments, the height of the support component is configured to be adjusted according to a height region of the object to be inspected that is focused on inspection, so that the main beam height of the ray beam is aligned with the height region that is focused on inspection.

[0027] In some embodiments, the height of the supporting component and the position of the movable platform along the first direction are configured to be adjusted so that the radiation beam covers the object to be inspected.

[0028] A second aspect of the present disclosure provides a radiographic inspection system, comprising:

[0029] The ray source device of the above embodiment; and

[0030] The detection device comprises a detector, wherein the detector is arranged opposite to the radiation source;

[0031] An inspection channel for the inspected object to pass through is formed between the ray source device and the detection device.

[0032] In some embodiments, in a first direction, there is a first distance between the radiation source and the object to be inspected, there is a second distance between the detector and the object to be inspected, multiple detectors are provided along the height direction and are detachable, and the radiation inspection system includes at least a first mode and a second mode.

[0033] The first distance in the first mode is smaller than the first distance in the second mode, the second distances in the first mode and the second mode are equal, and the number of detectors in working state along the height direction in the first mode is smaller than the number of detectors in working state in the second mode.

[0034] The ray source device of the disclosed embodiment can change the first distance between the ray source and the object to be inspected by setting a movable platform to adjust the position of the ray source in the first direction. In the actual detection process, the position of the ray source can be quickly and conveniently adjusted according to the detection requirements, so that the range of the ray beam can be adapted to the height of the object to be inspected, and better detection indicators can be obtained for different objects to be inspected; moreover, when replacing ray sources of different types or sizes, the position of the ray source along the first direction can also be adjusted to adapt it to the inspection requirements. Therefore, this ray source device can adapt to different detection conditions and has stronger versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a front view of some embodiments of the radiation source device disclosed in the present invention.

[0037] Figure 2 FIG. 4 is a side view of some embodiments of the radiation source device of the present disclosure in a first mode.

[0038] Figure 3 FIG. 4 is a side view of some embodiments of the radiation source device of the present disclosure in the second mode.

[0039] Figure 4 Schematic diagram of the structure of some embodiments of the sliding parts in the ray source device of the present invention.

[0040] Figure 5 1 is a side view of some embodiments of the radiographic inspection system of the present disclosure. Description of reference numerals:

[0041] 1. Fixed platform;

[0042] 2. Activity platform;

[0043] 3. Radiation source; 31. Main beam;

[0044] 4. Guide mechanism; 41. Sliding member; 411. Connecting seat; 411A. First wall; 411B. Second wall; 412. Bearing; 413. Roller; 42. Guide rail; 421. Groove; 421A. Top wall; 421B. Bottom wall; 421C. Side wall; 43. Reinforcement member;

[0045] 5. Supporting parts; 51. Outriggers;

[0046] 6. Object to be inspected;

[0047] 7. detection device; 71. detector; 72. mounting arm;

[0048] x, first direction; y, second direction; z, height direction. DETAILED DESCRIPTION

[0049] The following detailed description and drawings of the embodiments of the present disclosure are used to illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure, that is, the present disclosure is not limited to the described embodiments.

[0050] In the description of the embodiments of the present disclosure, the term "plurality" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two).

[0051] The present disclosure adopts descriptions of directions or positional relationships indicated by “upper”, “lower”, “top”, “bottom”, “front”, “back”, “inside” and “outside”, etc., which are only for the convenience of describing the present disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present disclosure.

[0052] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the tolerance range. "Parallel" is not strictly parallel, but is within the tolerance range. The directional words appearing in the following description are all directions shown in the figures, and are not intended to limit the specific structure of the present disclosure.

[0053] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0054] Reference to "embodiments" herein means that the particular features, structures, or characteristics described in conjunction with the embodiments may be included in at least some embodiments of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] like Figures 1 to 5 As shown, in some embodiments, the ray source device of the present disclosure includes:

[0056] Fixed platform 1;

[0057] A movable platform 2 is movably disposed above the fixed platform 1 along a first direction x; and

[0058] The ray source 3 is disposed on the movable platform 2 and is configured to emit a ray beam, and a projection of the ray beam in a horizontal plane extends along a first direction x.

[0059] Among them, the fixed platform 1 and the movable platform 2 can be rectangular or other shaped platforms, the movable platform 2 can be arranged above the fixed platform 1 at intervals to reduce friction during movement, and the movable platform 2 can be moved by manual force applied by an operator, or the ray source device also includes a driving mechanism, which is used to drive the movable platform to move along the first direction x to automatically adjust the position of the movable platform 2 and improve the position adjustment accuracy.

[0060] The ray source 3 is mounted on the movable platform 2. The ray beam emitted by the ray source 3 gradually diffuses outwards in a direction away from the ray source 3 to form a conical ray beam, that is, the cross section of the conical ray beam gradually increases in a direction away from the emission end. The ray source device also includes a collimator arranged at the ray emission end of the ray source 3. The collimator has a strip slit that allows rays to pass through. Only rays in the conical ray beam that are opposite to the strip slit of the collimator can be emitted outwards. Therefore, the ray beam passing through the collimator forms a fan shape, which is located in a vertical plane and whose projection in a horizontal plane is a straight line, and the straight line extends along a first direction x.

[0061] Optionally, different ray sources 3 may be selectively installed on the top of the movable platform 2. For example, different installation interfaces may be provided on the movable platform 2 to adapt to interfaces of ray sources 3 of different specifications (eg, different emission powers), thereby improving the versatility of the ray source device.

[0062] The fan-shaped beam passing through the collimator has an opening angle, and the portion of the beam located near the angular bisector of the opening angle is called the main beam 31. The main beam 31 has the highest energy and can obtain better imaging quality when used for radiographic inspection. Therefore, during radiographic inspection, it is expected that the main beam 31 can scan the key inspection area of ​​the object 6 to be inspected.

[0063] During radiographic examination, Figure 5 As shown, the ray source device and the detection device 7 are arranged at intervals along the first direction x, and an inspection channel for the object 6 to pass through is formed between the ray source device and the detection device 7. The object 6 to be inspected moves relatively in the channel. The detection device 7 includes a detector 71, which is used to receive the rays emitted by the ray source 3 to image the object 6 to be inspected.

[0064] There is a first distance L1 between the center of the ray source 3 (e.g., the target point of the ray source 3) and the side of the object 6 close to the ray source 3, which is called the source-object distance; there is a second distance L2 between the object 6 and the detection surface of the detector 71; there is a third distance L3 between the center of the ray source 3 and the detection surface of the detector 71, which is called the source-detection distance. When the ray source 3 moves along the first direction x to adjust its position, the first distance L1 can be changed. When the first distance L1 increases, that is, the ray source 3 is away from the object 6, the height range of the ray beam at the location of the object 6 increases, and a higher object 6 can be detected; when the first distance L1 decreases, that is, the ray source 3 is close to the object 6, the imaging quality is improved. Therefore, in the actual inspection process, the position of the movable platform 2 can be adjusted according to needs so that the ray source 3 is in a suitable position in the first direction x.

[0065] For example, in order to obtain the position of the ray source 3 with higher imaging quality, before performing the ray inspection, the position of the ray source 3 can be adjusted in the first direction x through the movable platform 2, and the corresponding image can be obtained through the detector 71. The position with the best image quality (that is, the best source-detection distance) can be obtained by comparing the images. When performing the ray inspection subsequently, the ray source 3 can be adjusted to this position.

[0066] In this embodiment, the first distance L1 between the ray source 3 and the object 6 can be changed by setting the movable platform 2 to adjust the position of the ray source 3 in the first direction x. In the actual detection process, the position of the ray source 3 can be quickly and conveniently adjusted according to the detection requirements, so that the range of the ray beam can be adapted to the height of the object 6, and better detection indicators can be obtained for different objects 6. Moreover, when replacing ray sources 3 of different types or sizes, the position of the ray source 3 along the first direction x can also be adjusted to adapt it to the inspection requirements. Therefore, this ray source device can adapt to different detection conditions and has stronger versatility.

[0067] In some embodiments, the ray source device further includes: a guiding mechanism, connected between the fixed platform 1 and the movable platform 2 , and configured to provide guidance for the movement of the movable platform 2 .

[0068] This embodiment can prevent the movable platform 2 from shaking during the movement along the first direction x by setting a guide mechanism between the fixed platform 1 and the movable platform 2, thereby improving the position adjustment accuracy of the ray source 3. Even if the position of the ray source 3 is adjusted along the first direction x, the ray source 3 can be aligned with the detection device 7, thereby ensuring imaging accuracy and improving ray detection accuracy.

[0069] In some embodiments, Figure 1 As shown, the guiding mechanism includes:

[0070] At least two guide rails 42 are arranged at intervals along the second direction y, the guide rails 42 extend along the first direction x, and the second direction y is perpendicular to the first direction x;

[0071] At least two sliding members 41 are matched with at least two guide rails 42 in a one-to-one correspondence, and the sliding members 41 can slide along the guide rails 42;

[0072] The movable platform 2 is connected to at least two sliding members 41 .

[0073] This embodiment guides the movable platform 2 by cooperating with the sliding member 41 and the guide rail 42. It has a simple structure, stable sliding, and strong bearing capacity. It can adapt to the bearing of various types of radiation sources and can also achieve a stable bearing effect for heavy radiation sources.

[0074] In some embodiments, a reinforcement member 43 is disposed between one side of the guide rail 42 along the second direction y and the fixed platform 1 , and a sliding member 41 is disposed on the other side of the guide rail 42 along the second direction y.

[0075] For example, the reinforcement member 43 may be a reinforcement plate, and a plurality of reinforcement plates may be arranged at intervals along the length direction of the guide rail 42 .

[0076] In this embodiment, the sliding member 41 is arranged on the side of the guide rail 42, which can reduce the space occupied by the guide mechanism in the height direction z, reduce the height of the movable platform 2 as much as possible, make the movement of the movable platform 2 more stable, and when the placement height of the object 6 to be inspected is low, the bottom area of ​​the object 6 to be inspected can be more comprehensively detected. In addition, by arranging the reinforcing member 43 on the other side of the guide rail 42, the connection strength of the guide rail 42 on the fixed platform 1 can be improved, and when the weight of the movable platform 2 and the radiation source 3 is large, it can also be stably supported, thereby improving the strength and reliability of the overall structure, and it is not easy to shake during the movement of the movable platform 2, thereby improving the alignment degree between the radiation emitted by the radiation source 3 and the detector 71.

[0077] In some embodiments, in the second direction y, the outermost sliding members 41 are all connected to the outer side surfaces of the corresponding guide rails 42 .

[0078] For example, the guide mechanism includes two guide rails 42 spaced apart along the second direction y, the two sliding members 41 are respectively disposed on the outer sides of the two guide rails 42 , and the reinforcing member 43 is disposed on the inner side of the guide rails 42 .

[0079] This embodiment arranges the sliding member 41 on the outer side of the guide rail 42, which can increase the support span of the two outermost sliding members 41 along the second direction y, improve the support stability of the movable platform 2, and help improve the alignment accuracy between the radiation beam emitted by the radiation source 3 and the detector 71.

[0080] In some other embodiments, in the second direction y, the outermost sliding member 41 is connected to the inner side surface of the corresponding guide rail 42 .

[0081] For example, the guide mechanism includes two guide rails 42 spaced apart along the second direction y, the two sliding members 41 are respectively disposed on the inner sides of the two guide rails 42 , and the reinforcing member 43 is disposed on the outer sides of the guide rails 42 .

[0082] In some embodiments, Figure 2 and Figure 4 As shown, a groove 421 is provided on the side of the guide rail 42, and the groove 421 has a top wall 421A and a bottom wall 421B opposite to each other along the height direction z. The sliding member 41 includes:

[0083] A connecting seat 411 having a first wall 411A and a second wall 411B adjacent to each other, wherein the first wall 411A is connected to the movable platform 2; and

[0084] The bearing 412 is rotatably mounted on the second wall 411B around its own axis, and the rotation axis extends along the second direction y. The bearing 412 is embedded in the groove 421 and cooperates with the top wall 421A and the bottom wall 421B to achieve rolling.

[0085] The side of the guide rail 42 is provided with a groove 421. Figure 1 The middle groove 421 is arranged on the outer side of the guide rail 42, so that the cross section of the guide rail 42 is C-shaped. The cross section of the connecting seat 411 in the plane perpendicular to the first direction x is roughly triangular, the first wall 411A of the connecting seat 411 is a top wall, which is provided with a mounting hole 411C for connecting with the movable platform 2 through a fastener, and the second wall 411B is a side wall, and the bearing 412 can be installed on the second wall 411B through a mounting plate, and the bearing 412 can roll in the groove 421.

[0086] This embodiment cooperates with the guide rail 42 through the bearing 412, so that the movable platform 2 can adjust the position with less resistance, stable operation and high position adjustment accuracy. By setting the connecting seat 411, the connection with the movable platform 2 and the bearing 412 can be achieved through a simple structure.

[0087] In some embodiments, Figure 2 and Figure 4 As shown, the groove 421 has a side wall 421C connected between the top wall 421A and the bottom wall 421B, and a roller 413 is provided in the central area of ​​the bearing 412. The rotation axis of the roller 413 is consistent with the height direction z, and the rolling surface of the roller 413 protrudes from the end surface of the bearing 412 and rolls along the side wall 421C.

[0088] In this embodiment, a roller 413 is arranged inside the bearing 412. When the bearing 412 is embedded in the groove 421, a preset gap can be maintained between the inner end surface of the bearing 412 and the side wall 421C, so that the roller 413 can roll along the side wall 421C, which can make the movement of the movable platform 2 more flexible and smooth, and prevent the increase of resistance to the movement of the movable platform 2 due to the small gap between the end of the bearing 412 and the side wall 421C.

[0089] In some embodiments, Figures 1 to 3 As shown, the ray source device further includes: a supporting component 5, which is disposed at the bottom of the fixed platform 1 and is configured to support the fixed platform 1, and the height of the supporting component 5 is adjustable.

[0090] This embodiment provides a height-adjustable support component 5 at the bottom of the fixed platform 1. When the height of the object 6 to be inspected changes, the height of the radiation source 3 can be adjusted accordingly as needed, or the height of the main beam 31 in the radiation beam emitted by the radiation source 3 can be adjusted, thereby adapting to a variety of different detection conditions.

[0091] In one structural form, the support member 5 includes a plurality of leg groups, the plurality of leg groups have different lengths, and a leg group can be selectively installed at the bottom of the fixed platform 1, each leg group includes a plurality of legs 51 arranged at intervals, and the legs 51 are detachably arranged. For example, each leg group includes four legs 51, and the four legs 51 are respectively arranged at the four corners of the fixed platform 1 to provide stable support for the fixed platform 1.

[0092] For example, when replacing the leg group, the fixed platform 1 can be lifted by auxiliary equipment such as a crane to remove the original leg group and replace it with a new leg group. The legs 51 can be repeatedly disassembled and installed, and the number is not limited.

[0093] This embodiment provides detachable legs 51, and when the height of the object 6 to be inspected changes, or when the height of the main beam 31 in the ray beam emitted by the ray source 3 needs to be adjusted, the leg groups of different lengths can be replaced to meet the actual detection needs. In this way, the legs 51 in the installed state are of fixed length, which makes it easy to keep the lengths of multiple legs 51 consistent, thereby ensuring the flatness of the surface on which the ray source 3 is installed on the movable platform 2 and improving the position accuracy of the emitted ray beam. Moreover, the fixed-length legs 51 have a more stable supporting force, and their supporting stability will not be affected by the vibration of the ray source 3 during operation. They can be applied to a variety of ray sources, all of which can ensure their positioning accuracy and prevent vibration from affecting image quality.

[0094] In another structural form, the support member 5 includes a plurality of legs 51 arranged at intervals, and the length of each leg 51 is adjustable. For example, the legs 51 can be in the form of hydraulic cylinders, air cylinders, or telescopic sleeves.

[0095] This embodiment uses a leg 51 with adjustable length. When adjusting the height of the radiation source 3, there is no need to remove the leg 51. The length of multiple legs 51 can be adjusted directly. The adjustment is simple and convenient. The height of the radiation source 3 can be quickly and flexibly adjusted according to the detection requirements to meet the needs of different working conditions. For example, the radiation source device may also include a controller, which may calculate the target height position of the radiation source 3 according to the height of the object to be inspected 6, and control the extension and retraction of the leg 51 to adjust the radiation source 3 to the target height position, so that the radiation beam of the radiation source 3 can cover the entire height of the object to be inspected 6; or the controller may adjust the extension and retraction of the leg 51 during the inspection process to adjust the radiation source 3 to different target height positions along the height direction z, thereby changing the main beam height of the radiation beam to perform focused inspections on different heights of the object to be inspected 6.

[0096] In some embodiments, the height of the support component 5 is configured so that the height of the main beam 31 of the radiation beam corresponds to the middle region of the object to be inspected 6 along the height direction z.

[0097] Among them, the ray beam is fan-shaped, and the main beam 31 is located in the area near the middle of the ray beam. The height of the ray source 3 directly determines the height of the main beam 31. The energy of the main beam 31 is the strongest. When other conditions are the same, the image quality at the location of the main beam 31 is the best, and better imaging quality can be obtained when used for X-ray inspection.

[0098] In this embodiment, the height of the supporting component 5 is adjusted so that the main beam 31 corresponds to the middle area of ​​the object under inspection 6 along the height direction z. Since the main beam 31 is located in the area close to the middle of the beam, the angular range of the beam can better cover the top and bottom positions of the object under inspection 6, so as to achieve a comprehensive inspection of the object under inspection 6.

[0099] Optionally, when the installation height of the radiation source 3 is increased by the support component 5, thereby increasing the height of the main beam 31, if the radiation beam cannot cover the bottom position of the object under inspection 6, the mounting bracket of the radiation source 3 can be designed to be able to adjust the pitch angle to adjust the coverage range of the radiation beam.

[0100] In some embodiments, the height of the support component 5 is configured to be adjusted according to a height region of the object 6 to be inspected in a focused manner, so that the height of the main beam 31 of the ray beam is aligned with the height region to be inspected in a focused manner.

[0101] Since the main beam 31 has the strongest energy, it can obtain better imaging quality when used for X-ray inspection. Therefore, for the same object 6 to be inspected, the height of the radiation source 3 can be changed by adjusting the height of the supporting component 5, so that the main beam 31 can be used to detect different height areas of the object 6 to be inspected in detail. For example, when inspecting suspicious areas with safety hazards, higher image quality can be obtained, thereby improving the accuracy of the inspection.

[0102] In some embodiments, the height of the supporting component 5 and the position of the movable platform 2 along the first direction x are configured to be adjusted so that the radiation beam covers the inspection object 6 .

[0103] When the height of the object 6 increases, on the one hand, the height of the support component 5 can be increased to increase the height position of the ray source 3, so as to adapt to the height of the object 6 in the height direction z; on the other hand, the ray source 3 can be moved away from the object 6 by moving the movable platform 2 to increase the height detection range at the location of the object 6. Since moving the ray source 3 backward will reduce the imaging quality to a certain extent, when the height of the object 6 increases, it is preferred to increase the height of the support component 5 to adapt to the height of the object 6.

[0104] This embodiment can adapt to different objects to be inspected 6 or meet different detection requirements by adjusting the height of the supporting component 5 and the position of the movable platform 2 along the first direction x. It can flexibly meet the detection requirements of different working conditions and achieve better detection performance. In addition, this multi-posture ray source device is simple, flexible and convenient to operate.

[0105] Secondly, the present disclosure provides a radiographic inspection system. In some embodiments, Figure 5 As shown, including:

[0106] The ray source device of the above embodiment; and

[0107] The detection device 7 comprises a detector 71, and the detector 71 is arranged opposite to the radiation source 3;

[0108] An inspection channel for the inspected object 6 to pass through is formed between the ray source device and the detection device 7 .

[0109] Specifically, a collimator is provided at the ray emitting end of the ray source 3, and the collimator has a strip slit that allows rays to pass through. Only rays in the conical ray beam that are opposite to the strip slit of the collimator can be emitted to the detector 71. Therefore, the projection of the ray beam passing through the collimator on the detector 71 is a straight line, that is, the ray beam after passing through the collimator forms a fan-shaped ray beam surface perpendicular to the inspection channel.

[0110] For example, the detection device 7 further includes a mounting arm 72, the mounting arm 72 is a strip-shaped structure extending along the height direction z, and a plurality of detectors 71 are arranged on the surface of the mounting arm 72, and the detectors 71 include a plurality of crystals for sensing radiation arranged in an array. When the radiation beam is aligned with the detector 71, that is, when the projection of the radiation beam on the plurality of detectors 71 extends along the height direction z and is aligned with the detector 71 in the second direction y, the radiation intensity detected by the detector 71 is the largest, and accordingly the detection effect is also the best.

[0111] In this embodiment, the position of the ray source 3 is adjusted in the first direction x by setting the movable platform 2, so that the first distance L1 between the ray source 3 and the object 6 to be inspected can be changed. In the actual detection process, the position of the ray source 3 can be quickly and conveniently adjusted according to the detection requirements, so that the range of the ray beam can be adapted to the height of the object 6 to be inspected, and better detection indicators can be obtained for different objects 6 to be inspected; moreover, when replacing ray sources 3 of different types or sizes, the position of the ray source 3 along the first direction x can also be adjusted to adapt it to the inspection requirements; in addition, when adjusting the position of the ray source 3 along the first direction x, the ray source 3 can also be aligned with the detector 71. Therefore, this ray inspection system can adapt to different detection conditions and has stronger versatility. Moreover, this ray inspection system has low production cost, simple installation and debugging, and high cost performance. For example, this ray inspection system can be used to perform safety inspections on the object 6 to be inspected.

[0112] In some embodiments, in the first direction x, there is a first distance L1 between the radiation source 3 and the object 6, there is a second distance L2 between the detector 71 and the object 6, and multiple detectors 71 are provided along the height direction z and are detachable. The radiation inspection system includes at least a first mode and a second mode.

[0113] The first distance L1 in the first mode is smaller than the first distance L1 in the second mode, the second distance L2 in the first mode and the second mode are equal, and the number of detectors 71 in working state along the height direction z in the first mode is smaller than the number of detectors 71 in working state in the second mode.

[0114] For example, the movable platform 2 is close in size to the fixed platform 1, the guide rail 42 extends along the first direction x over the entire length of the fixed platform 1, and two sliding members 41 are arranged at intervals along the first direction x at the bottom of the movable platform 2, one of the sliding members 41 is located at the end of the movable platform 2 away from the object 6, and the other sliding member 41 is located in the middle area of ​​the sliding platform. Figure 2 As shown, the movable platform 2 is located at the first extreme position on the right side, and the sliding member 41 in the middle area is located at the rightmost position of the guide rail 42, which is in the first mode; Figure 3 As shown, the movable platform 2 is located at the second extreme position on the left side, the movable platform 2 is aligned with the fixed platform 1 up and down, and the sliding member 41 in the middle area is located in the middle area of ​​the guide rail 42, which is in the second mode.

[0115] In this embodiment, the detector 71 is set to be detachable. When the first distance L1 between the ray source 3 and the object 6 is increased, the projection length of the ray source 3 on the detector 71 along the height direction z increases. Therefore, the number of detectors 71 can be increased in the height direction z to expand the receiving range of the received ray beam. Therefore, in actual detection, if the ray source 3 moves backward to increase the source-object distance of the first distance L1, the third distance L3 increases accordingly, and the number of detectors 71 also increases accordingly. At this time, the detection range increases and the height of the object 6 allowed to be inspected increases; if the ray source 3 moves forward to reduce the source-object distance of the first distance L1, the third distance L3 decreases accordingly, and the number of detectors 71 used also decreases accordingly, and the image quality improves. However, the traditional fixed ray inspection system cannot adjust the third distance L3 through operation, and can only ensure the quality of the image obtained by the detector 71 through design. Therefore, this ray inspection system can select a suitable working mode according to the actual detection needs to meet the needs of different working conditions.

[0116] In one implementation, the mounting arm 72 is designed according to the maximum height required in actual detection, and the number of detectors 71 is installed corresponding to the first distance L1. In the first mode, some detectors 71 outside the coverage of the fan-shaped beam are removed, and in the second mode, the number of detectors 71 is increased.

[0117] In another implementation form, the mounting arm 72 is designed according to the maximum height required in actual detection, and the detectors 71 are also covered according to the maximum height. If the number of detectors 71 required in actual detection is small, only some of the detectors 71 can be used to receive the ray beam, and the other detectors 71 are in a non-ray beam receiving state, so that the detectors 71 do not need to be frequently replaced. For example, when the first distance L1 decreases, only a part of the detectors 71 need to be used, and the detector 71 at the highest point does not detect radiation although it is installed on the mounting arm 72.

[0118] In some embodiments, multiple ray sources 3 may be provided, and the specifications of the multiple ray sources 3 may be the same or different. During detection, only one ray source 3 may be turned on according to detection needs, or multiple ray sources 3 may be turned on in sequence.

[0119] Optionally, multiple ray sources 3 are spaced apart along the height direction z, so that the third distances L3 between the multiple ray sources 3 and the detector 71 are consistent. By turning on the multiple ray sources in sequence, different height positions of the object 6 can be inspected in detail.

[0120] Optionally, multiple ray sources 3 are arranged at intervals along the second direction y. If the multiple ray sources 3 are arranged on an independent movable platform 2, the positions of the multiple ray sources 3 along the first direction x can be adjusted independently, and the multiple ray sources 3 are adjusted to different positions along the first direction x, that is, each ray source 3 and its corresponding detector have different source detection distances. By comparing the images obtained by turning on multiple ray sources 3 in sequence, the ray source 3 corresponding to the image with the highest quality can be obtained (that is, the best source detection distance is obtained), and the ray source 3 at the specific position can be fixedly used to perform ray inspection on the object 6. Alternatively, multiple ray sources 3 can also be arranged on the same movable platform 2.

[0121] Although the present disclosure has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ray source device, characterized in that: include: Fixed platform (1); A movable platform (2) is movably arranged above the fixed platform (1) along a first direction (x); and The ray source (3) is arranged on the movable platform (2) and is configured to emit a ray beam, wherein the projection of the ray beam in a horizontal plane extends along a first direction (x).

2. The radiation source device according to claim 1, characterized in that: Also includes: A guide mechanism is connected between the fixed platform (1) and the movable platform (2), and is configured to provide guidance for the movement of the movable platform (2).

3. The ray source device according to claim 2, characterized in that: The guiding mechanism comprises: At least two guide rails (42) are arranged at intervals along a second direction (y), the guide rails (42) extend along the first direction (x), and the second direction (y) is perpendicular to the first direction (x); At least two sliding members (41) are matched with at least two guide rails (42) in a one-to-one correspondence, and the sliding members (41) are slidable along the guide rails (42); Wherein, the movable platform (2) is connected to at least two of the sliding members (41).

4. The ray source device according to claim 3, characterized in that: A reinforcing member (43) is provided between one side of the guide rail (42) along the second direction (y) and the fixed platform (1), and the sliding member (41) is provided on the other side of the guide rail (42) along the second direction (y).

5. The ray source device according to claim 3, characterized in that: In the second direction (y), the sliding members (41) located at the outermost sides are all connected to the outer side surface or the inner side surface of the corresponding guide rail (42).

6. The ray source device according to claim 3, characterized in that: A groove (421) is provided on the side of the guide rail (42), and the groove (421) has a top wall (421A) and a bottom wall (421B) that are opposite to each other along the height direction (z). The sliding member (41) comprises: A connecting seat (411) having a first wall (411A) and a second wall (411B) adjacent to each other, wherein the first wall (411A) is connected to the movable platform (2); and The bearing (412) is rotatably mounted on the second wall (411B) around its own axis, and the axis of rotation extends along the second direction (y). The bearing (412) is embedded in the groove (421) and cooperates with the top wall (421A) and the bottom wall (421B) to achieve rolling.

7. The ray source device according to claim 6, characterized in that: The groove (421) has a side wall (421C) connected between the top wall (421A) and the bottom wall (421B), and a roller (413) is provided in the central area of ​​the bearing (412), the rotation axis of the roller (413) is consistent with the height direction (z), and the rolling surface of the roller (413) protrudes from the end surface of the bearing (412) and rolls along the side wall (421C).

8. The radiation source device according to any one of claims 1 to 7, characterized in that: Also includes: A support component (5) is provided at the bottom of the fixed platform (1) and is configured to support the fixed platform (1); the height of the support component (5) is adjustable.

9. The ray source device according to claim 8, characterized in that: The support component (5) comprises a plurality of leg groups, the plurality of leg groups have different lengths, one of the leg groups can be selectively installed at the bottom of the fixed platform (1), each of the leg groups comprises a plurality of legs (51) arranged at intervals, and the legs (51) are detachably arranged; or The supporting component (5) comprises a plurality of supporting legs (51) arranged at intervals, and the length of each supporting leg (51) is adjustable.

10. The ray source device according to claim 8, characterized in that: The height of the support component (5) is configured so that the height of the main beam (31) of the radiation beam corresponds to a middle region of the object to be inspected (6) along the height direction (z).

11. The ray source device according to claim 8, characterized in that: The height of the support component (5) is configured to be adjusted according to a height region of the object to be inspected (6) that is to be inspected in a focused manner, so that the height of the main beam (31) of the ray beam is aligned with the height region that is to be inspected in a focused manner.

12. The ray source device according to claim 8, characterized in that: The height of the support component (5) and the position of the movable platform (2) along the first direction (x) are configured to be adjusted so that the radiation beam covers the object to be inspected (6).

13. A radiographic inspection system, characterized in that: include: The radiation source device according to any one of claims 1 to 12; and A detection device (7) comprising a detector (71), wherein the detector (71) is arranged opposite to the radiation source (3); Wherein, an inspection channel for the inspected object (6) to pass through is formed between the ray source device and the detection device (7).

14. The radiographic inspection system according to claim 13, characterized in that: In the first direction (x), there is a first distance (L1) between the radiation source (3) and the object to be inspected (6), there is a second distance (L2) between the detector (71) and the object to be inspected (6), a plurality of detectors (71) are provided along a height direction (z) and are detachable, and the radiation inspection system comprises at least a first mode and a second mode, The first distance (L1) in the first mode is smaller than the first distance (L1) in the second mode, the second distances (L2) in the first mode and the second mode are equal, and the number of the detectors (71) in a working state along a height direction (z) in the first mode is smaller than the number of the detectors (71) in a working state in the second mode.

Images