A curvature generator and a variable curvature X-ray detection device

Abstract

This application provides a curvature generator and a variable curvature X-ray detection device. The curvature generator includes a frame body and a bending arm assembly. The bending arm assembly includes left front, left rear, right front, and right rear bending arms with identical structures. Each bending arm includes a rotating arm and a moving arm. The first end of the rotating arm of each of the left front, left rear, right front, and right rear bending arms is connected to the left front, left rear, right front, and right rear corners of the frame body, respectively, via a bidirectional damping mechanism; the second end of the rotating arm forms a sliding joint structure with the first end of the moving arm. The rotation axes of the left front and left rear bending arms coincide, denoted as axis L1; the rotation axes of the right front and right rear bending arms coincide, denoted as L2, and L1 and L2 are parallel. The technical solution of this application enables a flexible X-ray detection panel to bend to and maintain a desired radius of curvature, thereby reducing image distortion when performing X-ray detection on an object with a corresponding curvature.

Description

Technical Field

[0001] This application relates to the technical field of X-ray detection, and more specifically, to a curvature generator and a variable curvature X-ray detection device. Background Technology

[0002] X-ray detection devices utilize the penetrating, differential absorption, photosensitivity, and fluorescence of X-rays to project the density distribution information of different parts of an object onto an X-ray acquisition and imaging device, forming a corresponding image, thereby allowing observation of the object's internal structure and condition. They have wide applications in fields such as medical and industrial non-destructive testing.

[0003] Traditional flat-panel X-ray detectors, due to their use of non-flexible detection panels such as glass-type TFTs (Thin Film Transistors) and rigid structural designs, produce distorted images when detecting objects with curvature, such as those used in medical CBCT (Cone Beam CT) and non-destructive testing of pipelines. Aside from the area where the detector is in tangential contact with the object, the remaining portion of the image will be distorted. The greater the curvature of the object, the more severe the image distortion, thus complicating image evaluation and interpretation.

[0004] While X-ray detection devices with fixed curvature can reduce image distortion to some extent, they cannot adapt to objects with various curvatures.

[0005] For example, in the field of non-destructive testing of pipelines, due to the diverse diameters and curvatures of pipelines, image distortion almost always occurs when using a flat-panel X-ray inspection device to inspect pipelines. While using an X-ray inspection device with a fixed curvature can effectively improve image distortion for pipelines with a compatible curvature, it still results in image distortion for pipelines with an incompatible curvature. Summary of the Invention

[0006] The purpose of this application is to provide a curvature generator and a variable curvature X-ray detection device, which can bend a flexible X-ray detection panel to a desired radius of curvature and maintain it, thereby reducing image distortion when performing X-ray detection on an object with a corresponding curvature.

[0007] In a first aspect, a curvature generator is provided that can be used to guide and follow the bending of a flexible panel, causing the flexible panel to form with a predetermined radius of curvature. The curvature generator includes a frame body and a bending arm assembly.

[0008] The bending arm assembly includes four identical bending arms: a left front bending arm, a left rear bending arm, a right front bending arm, and a right rear bending arm. Each bending arm includes a rotating arm and a sliding arm. The first end of the rotating arm of each of the left front, left rear, right front, and right rear bending arms is connected to the left front, left rear, right front, and right rear corners of the frame body, respectively, via a bidirectional damping mechanism. The second end of the rotating arm forms a sliding joint with the first end of the sliding arm, allowing the sliding arm to move closer to or further away from the rotating arm. The rotation axis of the left front bending arm coincides with the rotation axis of the left rear bending arm, denoted as L1; the rotation axis of the right front bending arm coincides with the rotation axis of the right rear bending arm, denoted as L2; ​​rotation axes L1 and L2 are parallel.

[0009] In one feasible scheme, a preset minimum radius of curvature is formed when the distance between the first end of the moving arm of each of the left front, left rear, right front, and right rear bending arms and the second end of their respective rotating arms reaches the maximum separation distance.

[0010] In one feasible scheme, the radius of curvature R formed is +∞ when the distance between the first end of the moving arm of each of the left front, left rear, right front, and right rear bending arms and the second end of their respective rotating arms reaches the minimum separation distance.

[0011] In one feasible embodiment, the curvature generator further includes a crossbar; the movable arm of the left front bending arm and the movable arm of the left rear bending arm are connected by a crossbar parallel to the rotation axis L1, and the movable arm of the right front bending arm and the movable arm of the right rear bending arm are connected by a crossbar parallel to the rotation axis L2.

[0012] In one feasible approach, the rotation direction of all rotating arms is configured to rotate only to the same side.

[0013] In one feasible embodiment, the movable arm includes a mounting surface for attaching to the lower surface of one end of the flexible panel. The sliding direction of the sliding pair structure at the connection between the movable arm and the rotating arm is denoted as along the straight line L3. The angle between the mounting surface and the straight line L3 is configured to be 0.5° to 15°. The first end of the mounting surface is lower than the second end of the mounting surface, and the first end is the end closer to the frame body.

[0014] According to a second aspect of this application, a variable curvature X-ray detection device is also provided, including the curvature generator in the aforementioned scheme, and a flexible X-ray detection panel. The left end of the flexible X-ray detection panel is fixedly connected to the upper surface of the moving arm of the left front bending arm and the left rear bending arm, and the right end of the flexible X-ray detection panel is fixedly connected to the upper surface of the moving arm of the right front bending arm and the right rear bending arm. The middle lower surface of the flexible X-ray detection panel is configured to always be close to the middle upper surface of the frame body or directly connected to the middle upper surface of the frame body.

[0015] In one feasible embodiment, the flexible X-ray detection panel has two end blocks symmetrically arranged on the left and right sides. The lower surface of the left end block is fixedly connected to the movable arms of the left front bending arm and the left rear bending arm, and the lower surface of the right end block is fixedly connected to the movable arms of the right front bending arm and the right rear bending arm. The left end of the flexible X-ray detection panel is fixedly connected to the left end block, and the right end of the flexible X-ray detection panel is fixedly connected to the right end block.

[0016] In one feasible embodiment, the variable curvature X-ray detection device further includes a rib assembly and two side strips. The rib assembly includes a central ridge and multiple ribs. The central ridge is located between two end blocks, and its lower surface is connected to the upper surface of the frame body. The ribs are parallel to the central ridge and distributed on both sides of it. The lower surface of the flexible X-ray detection panel is attached to and connected to the upper surfaces of the central ridge and ribs. Both ends of the central ridge and ribs extend beyond the edges of the flexible X-ray detection panel. One side strip is positioned forward, and the other is positioned backward. The left and right ends of each side strip are fixedly connected to the two end blocks respectively. The lower surface of the forward side strip is attached to and fixedly connected to the upper surface of the front end of the central ridge and ribs. The lower surface of the backward side strip is attached to and fixedly connected to the upper surface of the rear end of the central ridge and ribs.

[0017] In one feasible embodiment, each end block has a first groove and a second groove on its upper and lower sides, respectively, facing the other end block. The variable curvature X-ray detection device further includes a flexible upper cover, a flexible lower cover, and a flexible edge assembly. The flexible upper cover covers the flexible X-ray detection panel, forming a predetermined installation gap with the rib assembly. The lower surface of the upper cover at the midpoint of its front and rear edges is attached to and fixed to the upper surface of the front and rear ends of the central ridge. The left and right ends of the upper cover are respectively inserted into the first grooves of the two end blocks to form a sliding fit. The front and rear edges of the upper cover are respectively pressed down by two edge strips and have relative sliding capability. The flexible lower cover covers the rib assembly. The upper surface of the lower cover at the midpoint of its front and rear edges is attached to and fixed to the lower surface of the front and rear ends of the central ridge. The middle of the left and right ends of the lower cover is fixed to the middle upper surface of the frame body. The left and right ends of the lower cover are respectively inserted into the second grooves of the two end blocks to form a sliding fit. An edge gap is formed between the lower cover and the edge strips. The flexible edge assembly is positioned in the edge gap between each edge strip and the lower cover plate, with both ends extending to abut against the two end blocks. The upper and lower surfaces of the flexible edge assembly are always attached to the edge strip and the lower cover plate, respectively. The ends of the central ridge and ribs are connected to the flexible edge assembly. The upper cover plate, lower cover plate, end blocks, edge strips, and flexible edge assembly form a relatively enclosed space to enclose the flexible X-ray detection panel.

[0018] In one feasible embodiment, the flexible edge assembly includes an elastic strip and multiple rigid plates. The elastic strip has two ends abutting against two end blocks, and the elastic strip has multiple grooves along its extension direction in the front-to-back direction. Each rigid plate includes an attachment portion and a limiting portion perpendicular to the attachment portion. An elastic strip is disposed in the edge gap between each edge strip and the lower cover plate, with both ends extending to abut against the two end blocks. The upper surface of the elastic strip is attached to the lower surface of the edge strip. The front and rear ends of the central ridge and ribs are engaged in the grooves of the elastic strip. The end faces of the central ridge and each rib are attached to and connected to the attachment portion of a rigid plate, and the limiting portion of each rigid plate is located below the elastic strip and forms an installation gap with a predetermined distance between it and the lower surface of the elastic strip. The upper surface of the lower cover plate is attached to the lower surface of the elastic strip, and the front and rear edges of the lower cover plate are inserted into the installation gap between the limiting portion and the elastic strip.

[0019] In one feasible embodiment, the stiffness of the upper cover plate is greater than that of the flexible X-ray inspection panel, the stiffness of the upper cover plate is greater than that of the lower cover plate, and the stiffness of the upper cover plate is greater than or equal to that of the edge strip.

[0020] In one feasible solution, the stiffness of the edge strip is less than or equal to the stiffness of the flexible X-ray inspection panel, and the stiffness of the lower cover plate is less than or equal to the stiffness of the flexible X-ray inspection panel.

[0021] In one feasible solution, the stiffness of the edge strip is less than that of the flexible X-ray inspection panel, and the stiffness of the lower cover plate is less than that of the flexible X-ray inspection panel.

[0022] In one feasible solution, a plurality of bending release grooves are provided along the bending direction of the edge strip, and the bending release grooves extend from the edge of the edge strip inward to a predetermined length.

[0023] In one feasible solution, a bending release groove is provided at the location where the edge strip connects to the central ridge and rib, and the axis of the bending release groove extends in the same direction as the axis of the central ridge or rib corresponding to its installation location.

[0024] In one feasible solution, a first gap always exists between the lower surface of the upper cover plate and the upper surface of the flexible X-ray detection panel, and a second gap always exists between the upper surface of the lower cover plate and the lower surface of the flexible X-ray detection panel.

[0025] Compared with the prior art, the beneficial effects of this application include at least the following:

[0026] When the curvature generator of this application guides and follows the bending of the flexible X-ray detection panel, the second end of the movable arm of the left front bending arm and the second end of the movable arm of the left rear bending arm are both connected to the left end of the flexible X-ray detection panel, the second end of the movable arm of the right front bending arm and the second end of the movable arm of the right rear bending arm are both connected to the right end of the flexible X-ray detection panel, and the middle lower surface of the flexible X-ray detection panel is connected to the upper surface of the frame body.

[0027] When bending from a flat state to form a predetermined curvature, the rotating arm of each bending arm rotates around the frame body. At the same time, the second end of the moving arm slides under the action of the sliding pair structure to adapt to the bent flexible X-ray detection panel. Furthermore, since the connection between the rotating arm and the frame body uses a bidirectional damping mechanism, the rotating arm can be suspended and held at any position during bending and flattening. This enables the flexible X-ray detector to bend and hold at any desired curvature, thereby allowing the flexible X-ray detection panel to adapt to objects with different curvatures. When performing X-ray detection on objects with curvature, the flexible X-ray detection panel can be adjusted to a suitable radius of curvature, thereby reducing image distortion and improving imaging quality. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural diagram of a curvature generator according to an embodiment of this application;

[0030] Figure 2 This is a cross-sectional view of the bending arm of a curvature generator according to an embodiment of this application;

[0031] Figure 3 This is a diagram illustrating the connection structure between the bending arm of the curvature generator and the frame body according to an embodiment of this application.

[0032] Figure 4 This is a structural diagram of a curvature generator with a crossbar according to an embodiment of this application;

[0033] Figure 5a This is a side view of the movable arm of the bending arm according to an embodiment of this application;

[0034] Figure 5b This is a side view of the bent arm in its flattened state, as shown in an embodiment of this application.

[0035] Figure 6 This is a three-dimensional structural diagram of a variable curvature X-ray detection device according to an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the exploded structure of a variable curvature X-ray detection device after the curvature generator has been removed, according to an embodiment of this application.

[0037] Figure 8 This is a schematic cross-sectional view of the end block of the variable curvature X-ray detection device according to an embodiment of this application;

[0038] Figure 9 This is a three-dimensional structural diagram of a variable curvature X-ray detection device in a bent state, according to an embodiment of this application.

[0039] Figure 10 This is a schematic diagram of the internal structure of a variable curvature X-ray detection device according to an embodiment of this application;

[0040] Figure 11 This is a schematic diagram of the ridge or rib structure of a variable curvature X-ray detection device according to an embodiment of this application;

[0041] Figure 12 This is a schematic diagram of the structure of the rigid sheet of the flexible edge assembly according to an embodiment of this application;

[0042] Figure 13 This is a schematic diagram of the structure of the elastic strip of the flexible edge assembly according to an embodiment of this application;

[0043] Figure 14 This is a schematic cross-sectional view of the connection between the elastic strip, rigid sheet, edge strip, and rib in an embodiment of this application.

[0044] Figure 15 This is a schematic diagram of the upper side structure of the end block of a variable curvature X-ray detection device according to an embodiment of this application;

[0045] Figure 16 This is a schematic diagram of the lower end block structure of a variable curvature X-ray detection device according to an embodiment of this application.

[0046] In the diagram: 10. Curvature generator; 11. Frame body; 12. Left front curved arm; 13. Left rear curved arm; 14. Right front curved arm; 15. Right rear curved arm; 121. Rotating arm; 122. Moving arm; 1221. Mounting surface; 123. Bidirectional damping mechanism; 124. Sliding pair structure; 16. Crossbar; 20. End block; 21. First slide groove; 22. Second slide groove; 23. End block body; 231. First stepped groove; 232. Second step 233, third step groove; 24, upper end block sealing plate; 25, lower end block sealing plate; 30, rib assembly; 31, central ridge; 32, rib; 311, fixing block; 312, stringer; 40, edge strip; 41, bending release groove; 50, upper cover plate; 60, lower cover plate; 70, flexible edge assembly; 71, elastic strip; 711, groove; 72, rigid sheet; 721, attachment part; 722, limiting part; 100, flexible X-ray detection panel. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0049] It should be noted that the terms "front," "back," "left," "right," "up," and "down" appearing in this application refer to [reference needed]. Figure 1 As shown, these directional terms are only used to clearly indicate the relative positional relationship between the components when describing the scheme, and do not constitute an absolute limitation on the position of each component in this scheme.

[0050] According to the first aspect of this application, Figure 1 , Figure 2 and Figure 3As shown, a curvature generator is first provided, which can be used to guide and follow the bending of a flexible panel, so that the flexible panel forms a predetermined radius of curvature. The curvature generator 10 includes a frame body 11 and a bending arm assembly. The bending arm assembly includes a left front bending arm 12, a left rear bending arm 13, a right front bending arm 14, and a right rear bending arm 15 with identical structures. Each bending arm includes a rotating arm 121 and a moving arm 122. The first end of the rotating arm 121 of each of the left front, left rear, right front, and right rear bending arms is connected to the left front corner, left rear corner, right front corner, and right rear corner of the frame body 11, respectively, through a bidirectional damping mechanism 123. The second end of the rotating arm 121 forms a sliding pair structure 124 with the first end of the moving arm 122, so that the moving arm 122 can move closer to or away from the rotating arm 121.

[0051] It should be noted that the aforementioned first end is the end closer to the frame body 11, and the aforementioned second end is the end farther away from the frame body 11.

[0052] like Figure 1 As shown, the rotation axis of the left front curved arm 12 coincides with the rotation axis of the left rear curved arm 13, and this rotation axis is denoted as L1; the rotation axis of the right front curved arm 14 coincides with the rotation axis of the right rear curved arm 15, and this rotation axis is denoted as L2; ​​the rotation axis L1 and the rotation axis L2 are parallel.

[0053] When the curvature generator 10 of this embodiment is in use, for example, if the flexible panel is a flexible X-ray detection panel, the second end of the moving arm 122 of the left front bending arm 12 and the second end of the moving arm 122 of the left rear bending arm 13 are both connected to the left end of the flexible X-ray detection panel, the second end of the moving arm 122 of the right front bending arm 14 and the second end of the moving arm 122 of the right rear bending arm 15 are both connected to the right end of the flexible X-ray detection panel, and the middle lower surface of the flexible X-ray detection panel 100 is connected to the upper surface of the frame body 11.

[0054] When bending from a flat state to form a predetermined curvature, the rotating arm 121 of each bending arm rotates around the frame body 11, while the second end of the moving arm 122 slides under the action of the moving pair structure 124 to adapt to the bent flexible X-ray detection panel. Furthermore, since the connection between the rotating arm 121 and the frame body 10 uses a bidirectional damping mechanism 123, the rotating arm 122 can be suspended and held at any position during bending and flattening, realizing the bending and holding of the flexible X-ray detector at any desired curvature. This allows the flexible X-ray detection panel to adapt to objects with different curvatures, thereby reducing or even eliminating image distortion of objects with different curvatures detected by X-rays.

[0055] It should be noted that the bidirectional damping mechanism 123 can use a disc damping shaft, a bidirectional gear rotary damper, etc. The sliding pair structure 124 can have various structural forms, including a guide rod and guide hole mating structure, or a slide rail structure, etc. Figure 2 The provided structure is only an example, and those skilled in the art can choose other forms of moving part structures according to the actual situation.

[0056] In this embodiment, when the distance between the first end of the moving arm 122 of each of the left front, left rear, right front, and right rear bending arms and the second end of their respective rotating arms 121 reaches the maximum separation distance, a preset minimum radius of curvature is formed. The minimum radius of curvature can be 15mm, 20mm, 30mm, 40mm, 50mm, 60mm, etc., or the minimum radius of curvature R ≥ 10mm. Based on the structural and material limitations of the flexible X-ray detection panel used in this embodiment, the minimum radius of curvature R formed in this embodiment is preferably ≥ 60mm. That is, when the curvature generator 10 guides and follows the bending of the flexible X-ray detection panel, the minimum radius of curvature of the flexible X-ray detection panel will basically not be less than 60mm, thereby avoiding damage to the flexible X-ray detection panel due to excessive bending.

[0057] It should be noted that the maximum separation distance between the first end of the movable arm 122 and the second end of the rotating arm 121 is exactly the maximum sliding stroke of the sliding joint structure 124. After that, the first end of the movable arm 122 can no longer move further away from the second end of the rotating arm 121. The sliding stroke can be limited by adding a limiting structure to the sliding joint structure 124 to prevent the risk of slippage of the sliding joint structure.

[0058] In this embodiment, when the distance between the first end of the moving arm 122 of each of the left front, left rear, right front, and right rear bending arms and the second end of their respective rotating arms 121 reaches the minimum separation distance, the resulting radius of curvature R is +∞.

[0059] By limiting the separation distance between the first end of the movable arm 122 and the second end of the rotating arm 121, the range of curvature radius variation of the bending can be limited, thus avoiding damage to the flexible panel.

[0060] In this embodiment, as Figure 4As shown, the curvature generator 10 also includes a crossbar 16. The moving arm 122 of the left front bending arm 12 and the moving arm 122 of the left rear bending arm 13 are connected by a crossbar 16 parallel to the rotation axis L1, so that the left front and left rear bending arms move synchronously. The moving arm 122 of the right front bending arm 14 and the moving arm 122 of the right rear bending arm 15 are connected by a crossbar 16 parallel to the rotation axis L2, so that the right front and right rear bending arms also move synchronously. Maintaining synchronous movement of the left front and left rear bending arms, and the right front and right rear bending arms, reduces internal structural forces during bending, making the bending process easier and smoother.

[0061] In this embodiment, as Figure 1 As shown, the rotation direction of all rotating arms 121 is configured to rotate only in the same direction to prevent reverse rotation from damaging the flexible panel or the flexible X-ray inspection panel. Reverse rotation of the rotating arms 121 can be limited by setting stops or by utilizing the structure of the frame body 11 itself. Alternatively, a limiting mechanism can be added to the bidirectional damping mechanism 123 to prevent reverse rotation of the rotating arms 121. It should be noted that the forward rotation of the rotating arms 121 is towards the bending direction of the flexible panel, and the reverse rotation of the rotating arms 121 is in the opposite direction to the bending direction of the flexible panel.

[0062] In this embodiment, as Figure 5a and Figure 5b As shown, the movable arm 122 includes a mounting surface 1221, which is used to fit and connect with the lower surface of one end of the flexible panel. The sliding direction of the sliding pair structure 124 at the connection between the movable arm 122 and the rotating arm 121 is denoted as the direction along the straight line L3. The angle between the mounting surface 1221 and the straight line L3 is configured to be 0.5° to 15°. The first end of the mounting surface 1221 is lower than the second end of the mounting surface 1221, and the first end is the end closer to the frame body 11. The angle β between the mounting surface 1221 and the straight line L3 is configured to be 0.5° to 15°, for example, it can be 0.5°, 1°, 2°, 3°, 6°, 10°, 12°, etc.

[0063] like Figure 5b As shown, the straight line extending along the sliding direction of the sliding pair structure 124 via the rotation axis of the rotating arm 121 is parallel to or coincides with the straight line L3. Therefore, when the mounting surface 1221 and the straight line L3 have a certain angle β, it can be ensured that the mechanism will not self-lock in the initial flattened state, so that it can respond quickly to the action when the force is applied, and make the bending arm move in the bending direction.

[0064] Furthermore, such as Figure 5bAs shown, in the preferred embodiment, in the initial flattened state, there is an angle α between the lower surface of the bending arm and the lower surface of the frame body 11. If it is to rotate in the opposite direction at this time, since the first end of the moving arm 122 and the second end of the rotating arm 121 have reached the minimum separation distance and cannot be further reduced, if it is to rotate through this angle α, it can only stretch the entire flexible panel that is fixed at the top. Since the entire flexible panel has a certain rigidity, it is difficult to stretch the entire flexible panel. Therefore, this is the dead point of the reverse rotation, which prevents the rotating arm 121 from rotating in the opposite direction, thereby avoiding reverse bending and damage to the flexible panel.

[0065] It should be noted that, as Figure 5b As shown, when the first end of the movable arm 122 and the second end of the rotating arm 121 reach the minimum separation distance, the mounting surface 1221 is higher than the rotation axis of the rotating arm 121, and the height of the entire curved arm is higher than the lower surface of the frame body 11.

[0066] According to a second aspect of this application, a variable curvature X-ray detection device is also provided, including the curvature generator 10 in the foregoing embodiments, and a flexible X-ray detection panel 100. The left end of the flexible X-ray detection panel 100 is fixedly connected to the upper surface of the moving arm 122 of the left front bending arm 12 and the left rear bending arm 13, and the right end of the flexible X-ray detection panel 100 is fixedly connected to the upper surface of the moving arm 122 of the right front bending arm 14 and the right rear bending arm 15. The middle lower surface of the flexible X-ray detection panel 100 is configured to always be close to the middle upper surface of the frame body 11 or directly connected to the middle upper surface of the frame body 11. The direct connection can be achieved by directly using screws and nuts, and the indirect connection can be achieved by using a third-party component to restrict the middle lower surface of the flexible X-ray detection panel 100 to a position that is always close to the middle upper surface of the frame body 11.

[0067] In this embodiment, as Figure 6 and Figure 7 As shown, the flexible X-ray detection panel 100 has two end blocks 20 symmetrically arranged on the left and right sides. The lower surface of the left end block 20 is fixedly connected to the movable arm 122 of the left front curved arm 12 and the left rear curved arm 13, and the lower surface of the right end block 20 is fixedly connected to the movable arm 122 of the right front curved arm 14 and the right rear curved arm 15. The flexible X-ray detection panel 100 is disposed between the two end blocks 20, with the left end of the flexible X-ray detection panel 100 fixedly connected to the left end block 20 and the right end of the flexible X-ray detection panel 100 fixedly connected to the right end block 20.

[0068] When bending, a force can be applied to the end block 20, thereby causing the bending arms of the curvature generator 10 to move, thereby guiding the flexible X-ray detection panel 100 to bend to the desired radius of curvature.

[0069] In this embodiment, as Figure 6 and Figure 7 As shown, the variable curvature X-ray detection device also includes a rib 30 and two side strips 40. The rib assembly 30 includes a central ridge 31 and multiple ribs 32. The central ridge 31 is located in the middle of the two end blocks 20, and its lower surface is connected to the upper surface of the frame body 11. The ribs 32 are parallel to the central ridge 31 and distributed on both sides of it. The lower surface of the flexible X-ray detection panel 100 is attached to and connected to the upper surfaces of the central ridge 31 and the ribs 32. Both ends of the central ridge 31 and the ribs 32 extend beyond the edges of the flexible X-ray detection panel 100. One of the two edge strips 40 is positioned at the front, and the other edge strip 40 is positioned at the rear. The left and right ends of each edge strip 40 are fixedly connected to two end blocks 20, respectively. The lower surface of the front edge strip 40 is attached to and fixedly connected to the upper surface of the front end of the central ridge 31 and the rib 32. The lower surface of the rear edge strip 40 is attached to and fixedly connected to the upper surface of the rear end of the central ridge 31 and the rib 32.

[0070] The rib assembly 30 bends along with the bend of the edge strip 40, and the flexible X-ray inspection panel 100 bends along with the bend of the rib assembly 30, making the bend of the flexible X-ray inspection panel 100 more gentle and natural.

[0071] In a relatively clean X-ray inspection environment, there is less dust and foreign matter, which will not have a significant impact on the imaging quality of the flexible X-ray inspection panel 100. Therefore, the aforementioned solution is more suitable for use in a relatively clean X-ray inspection environment.

[0072] However, if the detection environment is not clean and contains a lot of dust or foreign objects, the entry of dust or other foreign objects into the X-ray detection area will affect the image quality and may even cause a short circuit. For flat X-ray detection panels, since deformation is not required, the flat X-ray detection panel can be placed in a closed housing. However, for flexible X-ray detection panels, in order to minimize the entry of dust or other foreign objects from the detection environment, it is necessary to ensure that the flexible X-ray detection panel remains closed during bending. Therefore, this embodiment further supplements the following implementation scheme.

[0073] In this embodiment, as Figure 8 As shown, each end block 20 has a first groove 21 and a second groove 22 on its upper and lower sides, respectively, facing the other end block 20. Figure 6 and Figure 7As shown, the variable curvature X-ray detection device also includes a flexible upper cover plate 50, a flexible lower cover plate 60, and a flexible edge assembly 70. The flexible upper cover plate 50 covers the flexible X-ray detection panel 100, forming a predetermined installation gap with the rib assembly 30. The lower surface of the middle position of the front and rear edges of the upper cover plate 50 is attached and fixed to the upper surface of the front and rear ends of the central ridge 31. The left and right ends of the upper cover plate 50 are respectively inserted into the first sliding grooves 21 of the two end blocks 20 to form a sliding fit. The front and rear edges of the upper cover plate 50 are respectively pressed by the front and rear edge strips 40 and have relative sliding capability. A flexible lower cover plate 60 covers the rib assembly 30. The upper surface of the middle position of the front and rear edges of the lower cover plate 60 is attached to and fixed to the lower surface of the front and rear ends of the central ridge 31. The middle of the left and right ends of the lower cover plate 60 is fixed to the middle upper surface of the frame body 11. The left and right ends of the lower cover plate 60 are respectively inserted into the second sliding grooves 22 of the two end blocks 20 to form a sliding fit. An edge gap is formed between the lower cover plate 60 and the edge strip 40. A flexible edge assembly 70 is disposed in the edge gap between each edge strip 40 and the lower cover plate 60. The two ends of the flexible edge assembly 70 extend to abut against the two end blocks 20. The upper and lower surfaces of the flexible edge assembly 70 are always attached to the edge strip 40 and the lower cover plate 60, respectively. The two ends of the central ridge 31 and the rib 32 are connected to the flexible edge assembly 70.

[0074] In this embodiment, the upper cover plate 50, lower cover plate 60, end block 20, edge strip 40 and flexible edge assembly 70 form a space for enclosing the flexible X-ray detection panel 100, which is equivalent to forming a shell structure to protect the flexible X-ray detection panel 100.

[0075] like Figure 9 As shown, during bending, the end block 20 can act as a force-applying end. By applying force to the two end blocks 20, the two side strips 40 begin to bend, causing the ribs 32 of the rib assembly 30 to move, thereby causing the flexible X-ray detection panel 100 to bend. At the same time, each bending arm of the curvature generator 10 will also follow the movement. When the desired curvature radius is reached, due to the curvature holding function of the curvature generator 10, the flexible X-ray detection panel 100 can be well maintained in the state of the desired curvature radius.

[0076] Furthermore, during the bending process, the upper cover plate 50 also bends. When the upper cover plate 50 bends, its left and right ends slide in the first groove 21 of the end block 20. This compensates for the change in the bending length of the upper cover plate 50 while maintaining a sliding seal at its left and right ends. The front and rear edges of the upper cover plate 50 are also pressed down by the edge strip 40, achieving a sliding seal at the front and rear edges during bending. Simultaneously, as the lower cover plate 60 bends, its left and right ends slide in the second groove 22 of the end block 20. This compensates for the change in the bending length of the lower cover plate 60 while maintaining a sliding seal at its left and right ends. Furthermore, the flexible edge assembly 70 between the edge strip 40 and the lower cover plate 60 can essentially always adhere to the lower surface of the edge strip 40 and the upper surface of the lower cover plate 60 during the bending process.

[0077] In summary, the upper cover plate 50, lower cover plate 60, end block 20, edge strip 40, and flexible edge assembly 70 form a space for enclosing the flexible X-ray detection panel 100. This space can both drive and adapt to the bending of the flexible X-ray detection panel 100, and also maintain the space containing the flexible X-ray detection panel 100 in a relatively closed state during the bending process. This effectively reduces or even eliminates the entry of dust or other foreign objects from the detection environment into the space where the flexible X-ray detection panel 100 is located, thereby effectively protecting the flexible X-ray detection panel 100, stabilizing the imaging quality, and reducing the circuit failure rate caused by dust or impurities entering.

[0078] It should be noted that when bending to the minimum radius of curvature, the end of the upper cover plate 50 will not detach from the first groove 21, and the end of the lower cover plate 60 will not detach from the second groove 22. During the bending process, there is a gap between the upper and lower cover plates, so their radii of curvature at the same bending moment are different. At the same bending moment, the radius of curvature of the upper cover plate 50 is smaller than that of the lower cover plate 60.

[0079] In this embodiment, the first groove 21 and the second groove 22 of the end block 20 can be directly formed on the end block 20, or the following solutions can be adopted. For example... Figure 7 As shown, end block 20 includes end block body 23, upper end block sealing plate 24, and lower end block sealing plate 25. Figure 15 As shown, a first stepped groove 231 is provided on the upper surface of the end block body 23. After the end block upper sealing plate 24 is detachably covered on the upper surface of the end block body 23, the end block upper sealing plate 24 and the first stepped groove 231 cooperate to form a first sliding groove 21. Figure 16 As shown, a second stepped groove 232 is provided on the lower surface of the end block body 23. After the lower end block cover plate 25 is detachably covered on the lower surface of the end block body 23, the lower end block cover plate 25 and the second stepped groove 232 cooperate to form a second sliding groove 22. The upper end block cover plate 24 and the lower end block cover plate 25 can be easily disassembled and assembled.

[0080] In this embodiment, as Figure 15 As shown, the upper surface of the end block body 23 may also be provided with a third stepped groove 233. After the end block upper sealing plate 24 is detachably covered over the upper surface of the end block body 23, the end block upper sealing plate 24 and the third stepped groove 233 cooperate to form a space for accommodating the ends of the flexible panel. The ends of the flexible X-ray detection panel 100 are generally control circuit boards, etc., which can be fixed in the third stepped groove 233 and then covered and protected by the end block upper sealing plate 24.

[0081] In this embodiment, as Figure 10 As shown, the flexible edge assembly 70 includes an elastic strip 71 and a plurality of rigid sheets 72, wherein the two ends of the elastic strip 71 abut against two end blocks 20 respectively. Figure 13 As shown, the elastic strip 71 has multiple grooves 711 along its extension direction. Figure 12 As shown, the rigid sheet 72 includes an attachment portion 721 and a limiting portion 722 perpendicular to the attachment portion 721. As... Figure 10 As shown, an elastic strip 71 is provided in the edge gap between each edge strip 40 and the lower cover plate 60, with both ends of the elastic strip 71 extending to abut against the two end blocks 20. Figure 14 As shown, the upper surface of the elastic strip 71 is attached to the lower surface of the edge strip 40. The ends of the central ridge 31 and the ribs 32 are engaged in the grooves 711 of the elastic strip 71. The end faces of the central ridge 31 and each rib 32 are attached to and connected to the attachment portion 721 of a rigid piece 72. The limiting portion 722 of each rigid piece 72 is located below the elastic strip 71 and forms a predetermined installation gap M1 between it and the lower surface of the elastic strip 71. The upper surface of the lower cover plate 60 is attached to the lower surface of the elastic strip 71, and the front and rear edges of the lower cover plate 60 are inserted into the installation gap between the limiting portion 722 and the elastic strip 71. Thus, the edge bending seal is achieved by the elastic strip 71 and the multiple rigid pieces 72.

[0082] The attachment portion 721 of the rigid sheet 72 is attached to the outward side of the elastic strip 71, thereby protecting the elastic strip 71, making it more resistant to external impacts, minimizing the risk of collapse of the elastic strip 71, and ensuring the effect of bending and sealing the edges.

[0083] It should be noted that the elastic strip 71 can be made of EMC shielding foam, and the rigid sheet 72 can be made of steel.

[0084] It should be noted that, as shown in Figure 5, there is a certain distance between adjacent rigid plates 72, and at least when the minimum radius of curvature is reached, the rigid plates 72 will not collide or interfere with each other.

[0085] In this embodiment, the stiffness of the upper cover plate 50 can be greater than the stiffness of the flexible X-ray detection panel 100, thereby suppressing or preventing the flexible X-ray detection panel 100 from bending sharply or shaking due to external forces. The stiffness of the upper cover plate 50 can also be greater than the stiffness of the lower cover plate 60, and the stiffness of the upper cover plate 50 is also greater than or equal to the stiffness of the edge strip 40, so that the lower cover plate 60 and the edge strip 40 do not hinder the bending of the flexible X-ray detection panel 100 as much as possible.

[0086] The upper cover plate 50 can be made of carbon fiber, which can be bent into a curved surface and can unfold back to its original shape when the external force is removed. The side strip 40 can be made of aluminum, and the lower cover plate 60 can also be made of carbon fiber. The stiffness of the lower cover plate 60 can be made less than that of the upper cover plate 50 by adjusting the material composition.

[0087] In a preferred embodiment, the stiffness of the edge strip 40 is less than or equal to the stiffness of the flexible X-ray detection panel 100, and the stiffness of the lower cover plate 60 is less than or equal to the stiffness of the flexible X-ray detection panel 100, so as to further reduce the bending resistance of the flexible X-ray detection panel 100.

[0088] In a preferred embodiment, the stiffness of the edge strip 40 is less than that of the flexible X-ray detection panel 100, and the stiffness of the lower cover plate 60 is less than that of the flexible X-ray detection panel 100, so that the bending of the lower cover plate 60 and the edge strip 40 will not hinder the bending of the flexible X-ray detection panel 100, thereby further reducing the bending resistance of the flexible X-ray detection panel 100.

[0089] In this embodiment, as Figure 10 As shown, a plurality of bending release grooves 41 can be provided along the bending direction of the edge strip 40, and the bending release grooves 41 extend inward from the edge of the edge strip 40 for a predetermined length. Increasing the bending release grooves 41 helps to reduce the bending force and make it easier to bend.

[0090] In a preferred embodiment, such as Figure 10 As shown, a bending release groove 41 is provided at the connection between the edge strip 40 and the central ridge 31 and rib 32. The axis of the bending release groove 41 extends in the same direction as the axis of the central ridge 31 or rib 32 at the corresponding installation position. Because the connection structure at the connection between the central ridge 31 and rib 32 and the edge strip 40 has a certain impact on bending, it may cause bending at this point to be relatively more difficult. Therefore, providing a bending release groove 41 at the connection between the edge strip 40 and the central ridge 31 and rib 32 helps to improve the bending effect at the connection between the central ridge 31 and rib 32 and the edge strip 40, making it easier to bend.

[0091] Preferably, the bending release groove 41 generally extends a predetermined length from the edge of the edge strip 40 into its interior, which is equivalent to adding a notch to the edge strip 40 to reduce bending force.

[0092] Furthermore, in this embodiment, a first gap always exists between the lower surface of the upper cover plate 50 and the upper surface of the flexible X-ray detection panel 100, and a second gap always exists between the upper surface of the lower cover plate 60 and the lower surface of the flexible X-ray detection panel 100. The first and second gaps prevent direct contact between the flexible X-ray detection panel 100 and the upper and lower cover plates, thus preventing the flexible X-ray detection panel 100 from being damaged by local compression.

[0093] In this embodiment, as Figure 11 As shown, the rib assembly 30 has the same composition for its central ridge 31 and ribs 32, both including fixing blocks 311 at both ends and stringers 312 connecting the two fixing blocks 311. The upper surface of the fixing blocks 311 is higher than the upper surface of the stringers 312. The inner bottom surface of the first groove 21 of the end block 20 is flush with the upper surface of the fixing blocks 311. The front and rear ends of the flexible X-ray detection panel 100 are located between the two fixing blocks 311, and the lower surface of the flexible X-ray detection panel 100 is fixedly connected to the upper surface of the stringers 312. The lower surface of the middle part of the front and rear side edges of the upper cover plate 50 is attached to and connected to the upper surface of the fixing blocks 311 of the central ridge 31. The upper surface of the flexible X-ray detection panel 100 is always lower than the upper surface of the fixing blocks 311. At this time, the gap between the upper surface of the flexible X-ray detection panel 100 and the lower surface of the upper cover plate 50 is the first gap. The upper surface of the lower cover plate 60 is attached to and connected to the lower surface of the stringer 312. The thickness of the stringer 312 is the second gap between the upper surface of the lower cover plate 60 and the lower surface of the flexible X-ray detection panel 100.

[0094] It should be noted that the structure of the central ridge 31 and the rib 32 can be exactly the same or different. For example, since the central ridge 31 also needs to connect the upper and lower cover plates, the width of the central ridge 31 can be appropriately widened to increase structural stability.

[0095] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A variable curvature X-ray detection device, characterized in that, include: A curvature generator (10) includes a frame body (11) and a bending arm assembly. The bending arm assembly includes a left front bending arm (12), a left rear bending arm (13), a right front bending arm (14), and a right rear bending arm (15) with identical structures. Each bending arm includes a rotating arm (121) and a moving arm (122). The first end of the rotating arm (121) of each of the left front, left rear, right front, and right rear bending arms is connected to the left front corner, left rear corner, right front corner, and right rear corner of the frame body (11) through bidirectional damping. The mechanism (123) is connected; the second end of the rotating arm (121) and the first end of the moving arm (122) form a sliding pair structure (124) so ​​that the moving arm (122) can move closer to or away from the rotating arm (121); the rotation axis of the left front bent arm (12) coincides with the rotation axis of the left rear bent arm (13), and this rotation axis is denoted as L1; the rotation axis of the right front bent arm (14) coincides with the rotation axis of the right rear bent arm (15), and this rotation axis is denoted as L2; ​​the rotation axis L1 and the rotation axis L2 are parallel; A flexible X-ray detection panel (100) is provided, with its left end fixedly connected to the upper surface of the moving arm (122) of the left front curved arm (12) and the left rear curved arm (13), and its right end fixedly connected to the upper surface of the moving arm (122) of the right front curved arm (14) and the right rear curved arm (15). The flexible X-ray detection panel (100) has two end blocks (20) symmetrically arranged on the left and right sides. The lower surface of the left end block (20) is fixedly connected to the moving arm (122) of the left front curved arm (12) and the left rear curved arm (13), and the lower surface of the right end block (20) is fixedly connected to the moving arm (122) of the right front curved arm (14) and the right rear curved arm (15). The left end of the flexible X-ray detection panel (100) is fixedly connected to the end block (20) on the left side, and the right end of the flexible X-ray detection panel (100) is fixedly connected to the end block (20) on the right side. The variable curvature X-ray detection device also includes: The rib assembly (30) includes a central ridge (31) and multiple ribs (32). The central ridge (31) is located in the middle of the two end blocks (20), and the lower surface of the central ridge (31) is connected to the upper surface of the frame body (11). The ribs (32) are parallel to the central ridge (31) and distributed on both sides of the central ridge (31). The lower surface of the flexible X-ray detection panel (100) is attached to and connected to the upper surfaces of the central ridge (31) and the ribs (32). The front and rear ends of the central ridge (31) and the ribs (32) extend beyond the edge of the flexible X-ray detection panel (100). Two edge strips (40), one of which is forward and the other is backward. The left and right ends of each edge strip (40) are fixedly connected to the two end blocks (20) respectively. The lower surface of the forward edge strip (40) is attached to and fixedly connected to the upper surface of the front end of the central ridge (31) and the rib (32). The lower surface of the backward edge strip (40) is attached to and fixedly connected to the upper surface of the rear end of the central ridge (31) and the rib (32).

2. The variable curvature X-ray detection device according to claim 1, characterized in that, When the distance between the first end of the moving arm (122) of each of the left front, left rear, right front and right rear bending arms and the second end of their respective rotating arms (121) reaches the maximum separation distance, a preset minimum radius of curvature is formed.

3. The variable curvature X-ray detection device according to claim 2, characterized in that, When the distance between the first end of the moving arm (122) of each of the left front, left rear, right front and right rear bending arms and the second end of their respective rotating arms (121) reaches the minimum separation distance, the resulting radius of curvature R is +∞.

4. The variable curvature X-ray detection device according to claim 1, characterized in that, The curvature generator (10) also includes a crossbar (16); the movable arm (122) of the left front curved arm (12) and the movable arm (122) of the left rear curved arm (13) are connected by the crossbar (16) parallel to the rotation axis L1, and the movable arm (122) of the right front curved arm (14) and the movable arm (122) of the right rear curved arm (15) are connected by the crossbar (16) parallel to the rotation axis L2.

5. The variable curvature X-ray detection device according to claim 1, characterized in that, The rotation direction of all the said rotating arms (121) is configured to rotate only in the same direction.

6. The variable curvature X-ray detection device according to any one of claims 1-5, characterized in that, The movable arm (122) includes a mounting surface (1221) for attaching and connecting with the lower surface of one end of the flexible panel; The sliding direction of the sliding pair structure (124) at the connection between the movable arm (122) and the rotating arm (121) is denoted as the direction along the straight line L3; The angle between the mounting surface (1221) and the straight line L3 is configured to be 0.5° to 15°. The first end of the mounting surface (1221) is higher than the second end of the mounting surface (1221), and the first end is the end close to the frame body (11).

7. The variable curvature X-ray detection device according to claim 1, characterized in that, Each of the end blocks (20) is provided with a first groove (21) and a second groove (22) on its upper and lower sides, respectively, facing the other end block (20). The variable curvature X-ray detection device also includes: A flexible top cover (50) covers the flexible X-ray detection panel (100) and forms a predetermined installation gap with the rib assembly (30). The lower surface of the middle position of the front and rear edges of the top cover (50) is attached to and fixed to the upper surface of the front and rear ends of the central ridge (31). The left and right ends of the top cover (50) are respectively inserted into the first sliding groove (21) of the two end blocks (20) to form a sliding fit. The front and rear edges of the top cover (50) are respectively pressed by the front and rear edge strips (40) and have relative sliding ability. A flexible lower cover plate (60) covers the rib assembly (30). The upper surface of the middle position of the front and rear edges of the lower cover plate (60) is attached to and fixed to the lower surface of the front and rear ends of the central ridge (31). The middle of the left and right ends of the lower cover plate (60) is fixed to the middle upper surface of the frame body (11). The left and right ends of the lower cover plate (60) are respectively inserted into the second sliding groove (22) of the two end blocks (20) to form a sliding fit. An edge gap is formed between the lower cover plate (60) and the edge strip (40). A flexible edge assembly (70) is disposed in the edge gap between each of the edge strips (40) and the lower cover plate (60), and the two ends of the flexible edge assembly (70) extend to abut against the two end blocks (20). The upper and lower surfaces of the flexible edge assembly (70) are always attached to the edge strips (40) and the lower cover plate (60) respectively. The two ends of the central ridge (31) and the ribs (32) are connected to the flexible edge assembly (70). The upper cover plate (50), the lower cover plate (60), the end block (20), the side strip (40) and the flexible edge assembly (70) form a closed space to enclose the flexible X-ray detection panel (100).

8. The variable curvature X-ray detection device according to claim 7, characterized in that, The flexible edge assembly (70) includes an elastic strip (71) and a plurality of rigid sheets (72); The two ends of the elastic strip (71) abut against the two end blocks (20) respectively. The elastic strip (71) is provided with a plurality of grooves (711) along its extension direction. The rigid sheet (72) includes an attachment part (721) and a limiting part (722) perpendicular to the attachment part (721). The elastic strip (71) is provided in the edge gap between each of the side strips (40) and the lower cover plate (60), and the two ends of the elastic strip (71) extend to abut against the two end blocks (20). The upper surface of the elastic strip (71) is attached to the lower surface of the side strip (40), and the front and rear ends of the central ridge (31) and the rib (32) are engaged in the groove (711) of the elastic strip (71). The end faces of the central ridge (31) and each of the ribs (32) are attached to and connected to the attachment portion (721) of a rigid piece (72), and the limiting portion (722) of each rigid piece (72) is located below the elastic strip (71) and forms an installation gap with the lower surface of the elastic strip (71) at a predetermined distance. The upper surface of the lower cover plate (60) is attached to the lower surface of the elastic strip (71), and the front and rear edges of the lower cover plate (60) are inserted into the installation gap between the limiting part (722) and the elastic strip (71).

9. The variable curvature X-ray detection device according to claim 8, characterized in that, The stiffness of the upper cover plate (50) is greater than that of the flexible X-ray detection panel (100), the stiffness of the upper cover plate (50) is greater than that of the lower cover plate (60), and the stiffness of the upper cover plate (50) is greater than or equal to that of the edge strip (40).

10. The variable curvature X-ray detection device according to claim 9, characterized in that, The stiffness of the edge strip (40) is less than or equal to the stiffness of the flexible X-ray detection panel (100), and the stiffness of the lower cover plate (60) is less than or equal to the stiffness of the flexible X-ray detection panel (100).

11. The variable curvature X-ray detection device according to claim 10, characterized in that, The stiffness of the edge strip (40) is less than that of the flexible X-ray detection panel (100), and the stiffness of the lower cover plate (60) is less than that of the flexible X-ray detection panel (100).

12. The variable curvature X-ray detection device according to claim 9, characterized in that, A plurality of bending release grooves (41) are provided along the bending direction of the edge strip (40), and the bending release grooves (41) extend inward from the edge of the edge strip (40) for a predetermined length.

13. The variable curvature X-ray detection device according to claim 12, characterized in that, The bending release groove (41) is provided at the position where the side strip (40) connects with the central ridge (31) and the rib (32). The axis of the bending release groove (41) in the extension direction coincides with the axis of the central ridge (31) or the rib (32) in the extension direction corresponding to its installation position.

14. The variable curvature X-ray detection device according to any one of claims 8 to 13, characterized in that, There is always a first gap between the lower surface of the upper cover plate (50) and the upper surface of the flexible X-ray detection panel (100), and there is always a second gap between the upper surface of the lower cover plate (60) and the lower surface of the flexible X-ray detection panel (100).

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