CT examination system

Abstract

The invention provides a CT (computed tomography) examination system, which comprises a rotating bracket, a CT (computed tomography) examination device and a CT examination device, the scanning device is arranged on the rotating bracket and comprises a radiation source and a correspondingly arranged detection device; the two supporting devices are arranged below the rotating support and located on the two sides of the vertical axis passing through the center of the rotating support, each supporting device comprises at least one supporting device, each supporting device comprises a supporting beam and a supporting wheel, the supporting beams are arranged in a swinging mode, the supporting wheels are arranged on the supporting beams and make contact with the rotating support, and the supporting wheels are arranged on the supporting beams and make contact with the rotating support. An included angle alpha between a connecting line between the swinging center of the supporting beam and the center of the cross section, passing through the swinging center of the supporting beam, of the rotating support and a vertical axis passing through the center of the rotating support is adjustable and / or 20-60 degrees. Therefore, the rotating stability of the rotating bracket can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of radiation inspection, and particularly to a CT inspection system. Background Art

[0002] CT (computed tomography) inspection systems are widely used in the fields of medical treatment, security inspection, and customs anti-smuggling. They usually include a radiation source and a detection device. After the rays emitted by the radiation source irradiate the object to be inspected, they are received by the detection device to generate an image for inspecting the object to be inspected.

[0003] In some CT inspection systems, the radiation source and the detection device are arranged on a rotating bracket and rotate under the drive of the rotating bracket to perform a scanning inspection on the object to be inspected during rotation to generate a three-dimensional inspection graph of the object to be inspected. However, it is found in practice that the rotation stability of the rotating bracket is poor, which affects the image quality. Summary of the Invention

[0004] One technical problem to be solved by this application is to improve the rotation stability of the rotating bracket of the CT inspection system.

[0005] To solve the above technical problem, this application provides a CT inspection system, which includes:

[0006] A rotating bracket, which is rotatably arranged;

[0007] A scanning device, which is arranged on the rotating bracket and includes a radiation source and a correspondingly arranged detection device; and

[0008] Two groups of support devices, which are arranged under the rotating bracket and on both sides of the vertical axis passing through the center of the rotating bracket. Each group of support devices includes at least one support device. The support device includes a support beam and a support wheel. The support beam is swingably arranged. The support wheel is arranged on the support beam and contacts the rotating bracket to support the rotating bracket. Wherein, the included angle a between the connection line between the swing center of the support beam and the center of the cross-section of the rotating bracket passing through the swing center of the support beam and the vertical axis passing through the center of the rotating bracket is 20° to 60°; and / or, the included angle a between the connection line between the swing center of the support beam and the center of the cross-section of the rotating bracket passing through the swing center of the support beam and the vertical axis passing through the center of the rotating bracket is adjustable.

[0009] In some embodiments, the included angle a is 40° to 60°; and / or, the support device is movable in the relative arrangement direction of the two groups of support devices to make the included angle a adjustable.

[0010] In some embodiments, the rotating bracket includes a bracket body and a rotating track. The rotating track is disposed on the bracket body and has at least one of a diameter, strength, and hardness greater than that of the bracket body. The support wheel is in contact with the rotating track.

[0011] In some embodiments, the rotating bracket includes two rotating tracks. The two rotating tracks are arranged at intervals along the axial direction of the rotating bracket. Each of the two sets of support devices includes two support devices respectively located below the two rotating tracks.

[0012] In some embodiments, the ratio of the diameter of the rotating track to the axial distance between the two rotating tracks is 10 to 0.5.

[0013] In some embodiments, the ratio of the diameter of the rotating track to the axial distance between the two rotating tracks is 10 to 1.

[0014] In some embodiments, the rotating bracket includes a plurality of support segments. The plurality of support segments are arranged along the circumferential direction of the rotating bracket and are detachably connected.

[0015] In some embodiments, the circumferences of the plurality of support segments are equal or unequal; and / or, the rotating bracket includes at least three support segments.

[0016] In some embodiments, the support device includes one support wheel, and the support wheel is disposed at the swing center of the support beam; or, the support device includes two sets of support wheels, and the two sets of support wheels are disposed on both sides of the swing center of the support beam. Each set of support wheels includes one or more support wheels.

[0017] In some embodiments, the CT inspection system includes a power mechanism. The power mechanism is drivingly connected to the support wheel to drive the support wheel to drive the rotating bracket to rotate; and / or, the rotating bracket is swingably disposed.

[0018] By providing two sets of support devices below the rotating bracket and setting both sets of support devices to support the rotating bracket through the support wheels on the swingable support beam, and the included angle α between the line connecting the swing center of the support beam and the center of the cross-section of the rotating bracket passing through the swing center of the support beam and the vertical axis passing through the center of the rotating bracket is 20° to 60°, the rotational stability of the rotating bracket can be effectively improved.

[0019] Other features and advantages of the present application will become clear by describing the exemplary embodiments of the present application in detail with reference to the accompanying drawings below. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is the front view of the CT inspection system in the embodiment of the present application.

[0022] Figure 2 is Figure 1 the side view of.

[0023] Figure 3 is Figure 1 the schematic diagram of the cooperation between the rotating bracket and the supporting wheel in.

[0024] Figure 4 This is the schematic diagram of the cooperation between the rotating bracket and the supporting wheel in the first variant example.

[0025] Figure 5 This is the schematic diagram of the cooperation between the rotating bracket and the supporting wheel in the second variant example.

[0026] Figure 6 This is the structural schematic diagram of the rotating bracket in the third variant example.

[0027] Figure 7 This is the structural schematic diagram of the rotating bracket in the fourth variant example.

[0028] Figure 8 This is the structural schematic diagram of the rotating bracket in the fifth variant example.

[0029] Explanation of reference numerals:

[0030] 100, CT inspection system; 10, scanning device; 20, supporting device;

[0031] 1, radiation source; 2, detection device; 3, rotating bracket; 31, bracket body; 32, rotating track; 33, supporting section; 4, supporting wheel; 5, supporting beam; 6, supporting seat; 7, swing center. Detailed implementation manners

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0034] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0035] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0036] In the present application, unless otherwise specified, “plurality” means at least two, that is, including cases of two and at least three.

[0037] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0038] Figures 1 - 8 The structure of the CT inspection system in the present application is shown by way of example.

[0039] See also Figures 1 - 8, in the present application, the CT inspection system includes a rotating bracket 3, a scanning device 10, and two sets of supporting devices 20. The rotating bracket 3 is rotatably arranged. The scanning device 10 is arranged on the rotating bracket 3 and includes a radiation source 1 and a corresponding detection device 2. The two sets of supporting devices 20 are both arranged below the rotating bracket 3 and on both sides of the vertical axis passing through the center of the rotating bracket 3. Each set of supporting devices 20 includes at least one supporting device 20, and the supporting device 20 includes a supporting beam 5 and a supporting wheel 4. The supporting beam 5 is swingably arranged, and the supporting wheel 4 is arranged on the supporting beam 5 and contacts the rotating bracket 3 to support the rotating bracket 3. Among them, the included angle a between the connection line between the swing center 7 of the supporting beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the supporting beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 20° to 60°. It can be understood that the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the supporting beam 5 is the intersection point O of the rotation axis P of the rotating bracket 3 and the vertical plane where the swing center 7 of the supporting beam 5 is located, and the vertical plane where the swing center 7 of the supporting beam 5 is located is the vertical plane passing through the swing center 7 of the supporting beam 5.

[0040] In the above solution, since a supporting device 20 is provided for the rotating bracket 3 that supports and drives the radiation source 1 and the detection device 2 to rotate together, and the supporting device 20 is arranged below the rotating bracket 3 and the rotating bracket 3 is supported by the supporting wheel 4 arranged on the supporting beam 5, and the supporting beam 5 can swing during the rotation of the rotating bracket 3, so that the supporting wheel 4 is in full contact with the rotating bracket 3 to stably support the rotating bracket 3. Therefore, it is beneficial to improve the rotation stability of the rotating bracket 3.

[0041] Moreover, in the above solution, two sets of supporting devices 20 are provided below the rotating bracket 3. These two sets of supporting devices 20 are located on both sides of the vertical axis passing through the center of the rotating bracket 3 (which can be simply referred to as the left and right sides of the rotation axis of the rotating bracket 3), and for each supporting device 20, the included angle a between the connection line between the swing center 7 of the supporting beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the supporting beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 20° to 60°. In this way, not only can the supporting wheel 4 of each supporting device 20 be in full contact with the rotating bracket 3, but also the distance between the two sets of supporting devices 20 is appropriate, and the two sets of supporting devices 20 can support the rotating bracket 3 more stably together. Therefore, it is beneficial to further improve the rotation stability of the rotating bracket 3.

[0042] It can be seen that by arranging two sets of support devices 20 under the rotating bracket 3 that drives the radiation source 1 and the detection device 2 to rotate together, and setting both sets of support devices 20 to support the rotating bracket 3 through the support wheels 4 on the swingable support beam 5, and the included angle a between the connection line between the swing center 7 of the support beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 20° to 60°, the rotation stability of the rotating bracket 3 can be effectively improved. In this way, the rotation stability of the radiation source 1 and the detection device 2 can be effectively improved, the image quality can be improved, and the detection accuracy can be enhanced.

[0043] Moreover, by setting both sets of support devices 20 such that the included angle a between the connection line between the swing center 7 of the support beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 20° to 60°, it is also beneficial to improve the structural reliability and simplify the structure of the CT inspection system 100. Because when the included angle a between the connection line between the swing center 7 of the support beam 5 of both sets of support devices 20 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of this cross-section of the rotating bracket 3 is 20° to 60°, the two sets of support devices 20 can effectively share the pressure during the rotation of the rotating bracket 3. The stress conditions of each support device 20 are better, it is less likely to be damaged, the structural reliability is higher, and the service life is longer. And when the included angle a between the connection line between the swing center 7 of the support beam 5 of both sets of support devices 20 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 20° to 60°, the two sets of support devices 20 themselves can achieve reliable support for the rotating bracket 3. There is no need to additionally arrange a support structure, a guiding structure or an anti-tipping structure within the range above the two sets of support devices 20, and there is no need to set a complete ring for support on the outer side of the rotating bracket 3 in the radial direction. Therefore, the structure is simpler.

[0044] It can be seen that by arranging two sets of support devices 20 under the rotating bracket 3 that drives the radiation source 1 and the detection device 2 to rotate together, and setting both sets of support devices 20 to support the rotating bracket 3 through the support wheels 4 on the swingable support beam 5, and the included angle a between the connection line between the swing center 7 of the support beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 20° to 60°, not only can the rotation stability of the rotating bracket 3 be effectively improved, the image quality can be improved, and the detection accuracy can be enhanced, but also the structure can be effectively simplified and the structural reliability can be improved, enabling a more stable and accurate rotation scanning process to be realized based on a relatively simple and reliable structure.

[0045] Specifically, in some embodiments, the angle α between the line connecting the swing center 7 of the support beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 40° to 60°. For example, α is 40°, 42°, 45°, 48°, 50°, 53°, 55°, 57° or 59°. At this time, the magnitude of the angle α is more appropriate, which can better share the force, is more conducive to improving the rotational stability of the rotating bracket 3, simplifies the structure, and improves the structural reliability.

[0046] In the foregoing embodiments, for the same CT examination system 100, the angle α can be constant or adjustable. When the angle α is adjustable, it is convenient to flexibly change the magnitude of the angle α according to the actual situation (for example, the rotation speed of the rotating bracket 3 is different), so as to adjust the supporting effect of the supporting device 20 on the rotating bracket 30 and the scanning device 10 thereon, more effectively improve the rotational stability of the rotating bracket 3, simplify the structure, and improve the structural reliability. As an example of realizing the adjustability of the angle α, the supporting device 20 is configured to be movable in the relative arrangement direction of the two sets of supporting devices 20. In this way, the angle α can be adjusted by moving the supporting device 20 along the relative arrangement direction of the two sets of supporting devices 20 to make the supporting device 20 approach or move away from the other set of supporting devices 20, so as to flexibly meet different supporting requirements and achieve a better supporting effect.

[0047] In the foregoing embodiments, the number of the supporting wheels 4 in the supporting device 20 is not limited and can be one or more.

[0048] For example, referring to Figure 5 , in some embodiments, the supporting device 20 includes only one supporting wheel 4, and this one supporting wheel 4 is arranged at the swing center 7 of the support beam 5. At this time, when the support beam 5 swings, the contact position between the supporting wheel 4 and the rotating bracket 3 can be adjusted, so that during the rotation of the rotating bracket 3, the supporting wheel 4 can always be in good contact with the rotating bracket 3. Therefore, it is beneficial to improve the rotational stability of the rotating bracket 3, improve the image quality, and enhance the detection accuracy.

[0049] For another example, referring to Figures 1 - 3 and Figure 5, in some other embodiments, the support device 20 includes two sets of support wheels 4, which are arranged on both sides of the swing center 7 of the support beam 5, and each set of support wheels 4 includes one or more support wheels 4. At this time, the support device 20 no longer includes only one support wheel 4, but includes at least two support wheels 4, and these at least two support wheels 4 are divided into two groups, respectively located on both sides of the swing center 7 of the support beam 5. In this way, when the load on one set of support wheels 4 is relatively large, the support beam 5 can automatically distribute the load to the other set of support wheels 4 by swinging, so that each support wheel 4 can bear the load more evenly. This can not only more effectively improve the rotational stability of the rotating bracket 3 and simplify the structure, but also more effectively improve the stress conditions of each support device 20, reduce the damage risk of each support device 20, and improve the structural reliability of the CT inspection system 100.

[0050] In addition, in the foregoing embodiments, the support wheel 4 can only support the rotating bracket 3, or, while supporting the rotating bracket 3, it can also drive the rotation of the rotating bracket 3. For example, in some embodiments, the CT inspection system 100 includes a power mechanism, and the power mechanism is drivingly connected to the support wheel 4 to drive the support wheel 4 to drive the rotating bracket 3 to rotate. In this case, the support wheel 4 not only supports the rotating bracket 3, but also drives the rotation of the rotating bracket 3, with a more abundant function. At the same time, when the support wheel 4 rotates under the drive of the power mechanism, it can drive the rotating bracket 3 to rotate, and there is no need to additionally provide a rotation drive mechanism for the rotating bracket 3, which is simple and convenient.

[0051] When the support wheel 4 drives the rotating bracket 3 to rotate, the support wheel 4 can adopt various structural forms such as a gear or a friction wheel without teeth. Among them, when the support wheel 4 is a gear, a toothed ring for meshing with the support wheel 4 can be correspondingly provided on the rotating bracket 3, so that under the cooperation of the support wheel 4 and the toothed ring, the rotation of the rotating bracket 3 and the scanning device 10 can be realized. When the support wheel 4 is a friction wheel without teeth, the support wheel 4 can rotate the rotating bracket 3 by applying a frictional force to the rotating bracket 3 during rotation, realizing the friction drive process. Compared with the case where the support wheel 4 is a gear, when the support wheel 4 is a friction wheel without teeth, the rotation adaptive soft start of the rotating bracket 3 and the scanning device 10 can be realized, effectively preventing wear and damage due to excessive starting torque during gear transmission.

[0052] See Figure 2, in the foregoing embodiments, the rotating bracket 3 may include a bracket body 31, and the bracket body 31 may be arranged in a circular ring shape. On the one hand, it is more convenient for the relative arrangement of the radiation source 1 and the detection device 2 of the scanning device 10, and on the other hand, it is also more convenient for rotation control. The support wheel 4 can directly contact the bracket body 31 to support the rotating bracket 3, or alternatively, a rotating track 32 with at least one of the diameter, strength, and hardness greater than that of the bracket body 31 may be further provided on the bracket body 31, so that the support wheel 4 no longer directly contacts the bracket body 31 but contacts the rotating track 32. In this way, the wear on the bracket body 31 can be reduced, and the structural reliability can be further improved.

[0053] Among them, the number of the rotating tracks 32 may be one, or two or at least three. Among them, referring to Figure 2 , when there are two rotating tracks 32, the two rotating tracks 32 may be arranged at intervals along the axial direction of the rotating bracket 3 to form a double-track structure, enabling more stable support for the bracket body 31 based on a relatively simple structure, and facilitating the center of gravity of the rotating part of the CT examination system 100 to be located between the two rotating tracks 32, enhancing the running stability. It can be seen that setting the double-track structure can further improve the rotational stability of the CT examination system 100 based on a relatively simple structure, facilitating the acquisition of more stable and clear images.

[0054] In the case where the rotating bracket 3 includes two rotating tracks 32 arranged at intervals along the axial direction, referring to Figure 1 and Figure 2 , the two groups of support devices 20 may both include two support devices 20 respectively located below the two rotating tracks 32. At this time, two support devices 20 are correspondingly provided on both rotating tracks 32 and are located on both sides of the rotation axis of the rotating bracket 3 below the rotating bracket 3. In this way, a more stable supporting effect on the rotating bracket 3 can be achieved, enhancing the rotational stability of the CT examination system 100.

[0055] In addition, in the case where the rotating bracket 3 includes two rotating tracks 32 arranged at intervals along the axial direction of the rotating bracket 3, in some embodiments, the ratio of the diameter of the rotating track 32 to the axial distance between the two rotating tracks 32 is 10 to 0.5. For example, it is 10 to 1. At this time, the ratio of the diameter of the rotating track 32 to the axial distance between the two rotating tracks 32 is relatively appropriate, which can enable the CT examination system 100 to have a more appropriate aspect ratio stability coefficient, facilitating further improvement of the rotational stability of the rotating bracket 3 and the scanning device 10.

[0056] In the foregoing embodiments, the rotating bracket 3 may be integrally designed in the circumferential direction, or may also be designed in segments. For example, referring to Figures 6 - 8, in some embodiments, the rotating bracket 3 includes a plurality of support segments 33. These support segments 33 are arranged along the circumference of the rotating bracket 3 and are detachably connected. At this time, the rotating bracket 3 adopts a segmented assembly design in the circumferential direction, which is more convenient for the processing, assembly, and transportation of the rotating bracket 3, especially for large rotating brackets 3.

[0057] Among them, the number of support segments 33 can be two or at least three to achieve a two-segment, three-segment or more-segment design of the rotating bracket 3. When the number of support segments 33 is two, the number of segments of the rotating bracket 3 is less and the structure is relatively simple. When the number of support segments 33 is at least three, the number of segments of the rotating bracket 3 is more, which is more convenient for the processing, assembly, and transportation of the rotating bracket 3, especially for large rotating brackets 3.

[0058] In addition, the circumferences of the support segments 33 can be equal or unequal to achieve a regular or irregular segmented design of the rotating bracket 3. When the circumferences of the support segments 33 are equal, the versatility is stronger. When the circumferences of the support segments 33 are unequal, the flexibility is stronger, which is convenient for better meeting the processing, assembly, and transportation requirements of rotating brackets 3 of different specifications.

[0059] When the rotating bracket 3 adopts a segmented assembly design in the circumferential direction, either only one of the bracket body 31 and the rotating track 32 can adopt a segmented design, or both the bracket body 31 and the rotating track 32 can adopt a segmented design. When both the bracket body 31 and the rotating track 32 adopt a segmented design, each support segment 33 includes both a body segment (i.e., the segment that the bracket body 31 is divided into) and a track segment (i.e., the segment that the rotating track 32 is divided into), which is more convenient for the processing, assembly, and transportation of the rotating bracket 3, especially for large rotating brackets 3.

[0060] When segmenting the rotating bracket 3, it can be ensured that during the swinging process of the rotating bracket 3, it always contacts the support device 20 through the same support segment 33, and the other support segments 33 of the rotating bracket 3 do not contact the support device 20. In this way, the support device 20 will not pass through the connection part between different support segments during the swinging process of the rotating bracket 3 and will not contact the connection part between different support segments, which is more conducive to improving the smoothness of the swinging of the rotating bracket 3.

[0061] The following Figures 1 - 8 illustrated embodiments are used to further illustrate the present application.

[0062] First, introduce Figures 1 - 3 the illustrated embodiments.

[0063] As Figures 1 - 3As shown, in this embodiment, the CT inspection system 100 includes a scanning device 10, a rotating bracket 3, and two sets of supporting devices 20. The scanning device 10 is disposed on the rotating bracket 3 and rotates with the rotating bracket 3 under the driving action of the two sets of supporting devices 20.

[0064] Among them, the rotating bracket 3 is used to provide an installation basis for the scanning device 10 and drive the scanning device 10 to rotate to achieve rotational scanning of the object to be inspected. Figure 1 and Figure 2 It can be seen that in this embodiment, the rotating bracket 3 is reciprocally swingably arranged and includes a bracket body 31 and two rotating tracks 32. The bracket body 31 is annular, and its central axis forms the rotation axis of the rotating bracket 3, and its internal space forms an inspection channel for the object to be inspected to pass through. The two rotating tracks 32 are fixed on the outer surface of the bracket body 31, and correspondingly are also annular, and are arranged at intervals along the central axis of the bracket body 31 and are located at both axial ends of the bracket body 31. Based on this, the rotating bracket 3 has a double-track structure, which is convenient for cooperating with the two sets of supporting devices 20 to achieve a more stable rotation process.

[0065] In this embodiment, the diameters of the two rotating tracks 32 are equal and are both larger than the diameter of the bracket body 31. Moreover, the ratio of the diameter of the two rotating tracks 32 to the axial distance between the two rotating tracks 32 is 2, 3, 4, 5, 6, 7, 8, or 9. At the same time, the hardness, strength, and wear resistance of the two rotating tracks 32 are all greater than those of the bracket body 31.

[0066] The scanning device 10 is used to scan the object to be inspected and includes a radiation source 1 and a detection device 2. In this embodiment, the radiation source 1 is used to generate X-rays that penetrate the object to be inspected, and it can use an X-ray machine or an accelerator. The detection device 2 is used to receive the X-rays that pass through the object to be inspected and convert the received X-rays into electrical signals that can be recorded for the imaging device of the CT inspection system 100 to generate CT images, and it can use a detector array structure.

[0067] Such as Figure 1As shown, in this embodiment, the CT inspection system 100 includes only one scanning device 10. Both the radiation source 1 and the detection device 2 of the scanning device 10 are arranged on the rotating bracket 3, and are respectively located on the outer periphery and the inner periphery of the rotating bracket 3, opposite to each other. Based on this, when the object to be inspected passes through the inspection channel in the middle of the bracket body 31, the radiation source 1 can emit X-rays to penetrate the object to be inspected, and the X-rays penetrating the object to be inspected can be projected onto the detection device 2 arranged opposite to the radiation source 1, thereby being able to form a CT image. During each scan, a section of the object to be inspected is placed in the passing channel for the scanning device to scan the corresponding section of the object to be inspected. After each section is scanned, the object to be inspected is pulled by the traction device of the CT inspection system 100 to the next section position in the passing channel to complete the scanning of the next section. This continues until the entire object to be inspected is scanned. Among them, the object to be inspected can be large goods (such as containers), vehicles, or airplanes, etc.

[0068] And, as Figure 1 shown, the detection device 2 of this embodiment is arranged in an arc centered on the corresponding radiation source 1. Specifically, in this embodiment, the detection device 2 adopts a detector array structure, and multiple detectors are arranged in an array on the detection arm, and the detection arm is in an arc centered on the radiation source 1. Since the detection device 2 is in an arc centered on the radiation source 1, the distances from different parts of the entire detection device 2 to the radiation source 1 are the same, that is, the distances from each detector in the detector array to the radiation source 1 are the same. This setting method of equal source-detector distance is more convenient for imaging compared with the setting method of unequal source-detector distance (for example, the detection device 2 is in an arc centered on the center of the rotating bracket 3). At the same time, subsequent related calculations and analyses are also simpler and more convenient, which is beneficial to improving the inspection accuracy.

[0069] Two groups of support devices 20 together constitute a rotation drive device, which is drivingly connected to the rotating bracket 3 and is used to rotate the scanning device 10 by driving the rotation of the rotating bracket 3. Combining Figure 1 and Figure 2 it can be known that in this embodiment, both groups of support devices 20 are arranged below the rotating bracket 3 and are located on both sides of the rotation axis passing through the rotating bracket 3, and both include two support devices 20 corresponding to the two rotating tracks 32 one by one. In this way, the CT inspection system 100 includes a total of four support devices 20. These four support devices 20 are all arranged below the rotating bracket 3 and are correspondingly arranged in pairs with the aforementioned two rotating tracks 32, that is, in this embodiment, each rotating track 32 corresponds to two support devices 20, and the two support devices 20 arranged below the same rotating track 32 are respectively located on both sides of the rotation axis of the rotating bracket 3.

[0070] The support device 20 is arranged below the rotating bracket 3, so that while driving the rotating bracket 3 to rotate, the support device 20 can also play a certain supporting role for the rotating bracket 3 and the scanning device 10 located on the rotating bracket 3. Since there is no need to additionally set up a special supporting structure, the structure is relatively simple and stable.

[0071] Two support devices 20 located on both sides of the rotation axis are arranged below the same rotation track 32, so that these two support devices 20 can more stably support the corresponding part of the rotating bracket 3 corresponding to the rotation track 32, and these two support devices 20 can act on the rotation track 32 more efficiently and stably, driving the rotating bracket 3 to rotate more efficiently and stably.

[0072] Four support devices 20 are arranged to cooperate with two rotation tracks 32 to drive the rotating bracket 3. On the one hand, it is convenient to provide a greater rotation driving force and improve the rotation driving efficiency; on the other hand, it can also reduce the load borne by each support device 20, lower the strength requirements for each support device 20, reduce the wear of each support device 20, and improve the structural reliability; on the other hand, it is also beneficial to improve the rotation stability of the entire rotating bracket 3; on the other hand, it is also convenient to achieve multi-point drive synchronization adaptability.

[0073] In this embodiment, in order to make the structure of the rotation driving device relatively simple, the structures of the four support devices 20 are all the same. Based on this, only one of the support devices 20 will be taken as an example for description below to simplify the description.

[0074] As Figures 1 - 3 shown, in this embodiment, the support device 20 includes a support base 6, a support beam 5 and two groups of support wheels 4. Among them, the support base 6 is fixed on an installation foundation such as the ground. The middle part of the support beam 5 is pivotally connected to the support base 6, so that the support beam 5 is swingably arranged below the rotating bracket 3. Two groups of support wheels 4 are arranged between the support beam 5 and the rotation track 32 and are located at both ends of the support beam 5, so that the two groups of support wheels 4 are located on both sides of the swing center 7 of the support beam 5.

[0075] In this embodiment, each group of support wheels 4 only includes one support wheel 4, and this support wheel 4 is a friction wheel, which contacts the rotation track 32 and is drivingly connected to a power mechanism (such as a motor), so as to rotate under the drive of the power mechanism and apply a frictional force to the rotation track 32 during the rotation process, driving the rotating bracket 3 and the scanning device 10 arranged on the rotating bracket 3 to rotate.

[0076] Two support wheels 4 are arranged on each support beam 5. Compared with the case where only one support wheel 4 is arranged on each support beam 5, it can provide a greater frictional driving force for the rotation of the rotating bracket 3, realize a more efficient rotation process. At the same time, it can disperse the pressure of the rotating bracket 3, reduce the load borne by a single support wheel 4, reduce the wear of the support wheel 4, extend the service life of the support wheel 4, increase the use reliability of the support wheel 4, and reduce the maintenance and replacement cost.

[0077] Moreover, the support beam 5 is arranged swingably, so that the two support wheels 4 located on both sides of its swing center can contact the rotating track 32 more stably, preventing problems such as insufficient driving and bumping of the rotating bracket 3 when one contacts while the other does not, improving the rotation stability. At the same time, when one of the two support wheels 4 bears a large pressure, the support beam 5 can also automatically distribute the pressure to the other one through swinging, so that the two support wheels 4 on both sides of the swing center can bear the pressure more evenly. On the one hand, this can prevent a single support wheel 4 from being worn and damaged due to excessive pressure, and on the other hand, it can also disperse the driving force and braking force, improving the driving reliability and rotation stability.

[0078] And arranging a power mechanism for each support wheel 4 not only makes it more convenient to arrange the power mechanism, but also enables the CT inspection system 100 to have multiple power sources, forming multi-point drive, which is beneficial to increasing the driving force and is also beneficial to reducing the structural size and power parameters of the driving device.

[0079] Back to Figure 1 In this embodiment, each support device 20 is arranged such that the included angle a between the connection line between the swing center 7 of the support beam 5 and the center of the cross-section of the rotating bracket 3 passing through the swing center 7 of the support beam 5 and the vertical axis passing through the center of the rotating bracket 3 is 40°. At this time, the arrangement angle of each support device 20 and the distance between the two groups of support devices 20 are more appropriate. The support wheels 4 of each support device 20 can contact and friction with the rotating track 32 more fully, and the two groups of support devices 20 can support the rotating bracket 3 more stably together. Therefore, the rotation stability of the rotating bracket 3 can be more effectively improved, the inspection accuracy of the CT inspection system 100 can be improved, and the stress conditions of each support device 20 can be improved, enhancing the structural reliability of the CT inspection system 100.

[0080] In this embodiment, the four support devices 20 together do not drive the rotating bracket 3 to rotate a full circle (i.e., 360°), but drive the rotating bracket 3 to rotate (i.e., swing) within an angle range less than 360°, such as within the ranges of 270°, 180°, 120°, 100°, 90° or 80°. In this way, it more meets the scanning requirements of large objects to be inspected such as containers, and is more beneficial to reducing the requirements for the power mechanism and reducing costs.

[0081] It can be seen that the CT inspection system 100 of this embodiment has a relatively simple and reliable structure, good rotational stability, can generate more stable and accurate images, and is convenient for obtaining more accurate inspection results for large goods and vehicles and other large objects to be inspected.

[0082] Next, the Figure 4 illustrated embodiment will be introduced.

[0083] As Figure 4 shown, the main difference between this embodiment and the Figures 1 - 3 illustrated embodiment described above is that, in this embodiment, although the support device 20 still includes two sets of support wheels 4, each set of support wheels 4 no longer includes only one support wheel 4, but includes at least two support wheels 4. In this way, more support wheels 4 are provided on both sides of the swing center of the support beam 5, which is beneficial to better share the pressure, more stably support and drive the rotating bracket 3 and the scanning device 10. Therefore, the rotational stability of the rotating bracket 3 is improved, the inspection accuracy of the CT inspection system 100 is improved, the stress condition of each support device 20 is improved, and the structural reliability of the CT inspection system 100 is improved.

[0084] Next, the Figure 5 illustrated embodiment will be introduced.

[0085] As Figure 5 shown, the main difference between this embodiment and the Figures 1 - 4 illustrated embodiment described above is that, in this embodiment, the support device 20 no longer includes two sets of support wheels 4, but only includes one support wheel 4, and this one support wheel 4 is provided at the swing center 7 of the support beam 5 ( Figure 5 not shown in the figure), that is, the rotation center of the support wheel 4 coincides with the swing center 7 of the support beam 5. At this time, the number of support wheels 4 is small, so the structure is relatively simple.

[0086] Next, the Figure 6 illustrated embodiment will be introduced.

[0087] As Figure 6 shown, the main difference between this embodiment and the Figures 1 - 5 illustrated embodiment described above is that the rotating bracket 3 no longer adopts an integral structure in the circumferential direction, but adopts a segmented design. Specifically, as Figure 6 can be seen, in this embodiment, the rotating bracket 3 includes two support segments 33, the circumferences of these two support segments 33 are equal, they are arranged along the circumferential direction, and are detachably connected to each other. In this way, it is convenient for the processing, assembly and transportation of the rotating bracket 3, especially a large rotating bracket 3.

[0088] Next, the Figure 7 illustrated embodiment will be introduced.

[0089] AsFigure 7 As shown, in this embodiment, the rotating bracket 3 also adopts a circumferential segmented design, but different from the foregoing Figure 6 shown embodiment, the rotating bracket 3 of this embodiment no longer only includes two support segments 33, but includes three support segments 33. The circumferences of these three support segments 33 are equal, and they are detachably connected to each other in sequence along the circumferential direction. In this way, it is also convenient for the processing, assembly and transportation of the rotating bracket 3, especially the large rotating bracket 3.

[0090] Finally, the embodiment shown Figure 8 will be introduced.

[0091] As Figure 8 shown, in this embodiment, the rotating bracket 3 also adopts a circumferential segmented design, but different from the foregoing Figure 6 and Figure 7 shown embodiments, the rotating bracket 3 of this embodiment no longer includes two or three support segments 33, but includes four support segments 33. The circumferences of these four support segments 33 are not equal, and they are detachably connected to each other in sequence along the circumferential direction. In this way, it is also convenient for the processing, assembly and transportation of the rotating bracket 3, especially the large rotating bracket 3.

[0092] It should be noted that the CT inspection system 100 of the present application is not limited to Figures 1 - 8 the several embodiments shown. For example, as a variant, in some other embodiments, the CT inspection system 100 does not only include one scanning device 10, but includes at least two scanning devices 10, and these at least two scanning devices 10 are arranged on the rotating bracket 3 at intervals from each other along the circumferential direction to scan the object to be inspected from different angles, and complete the scanning of different angles of the object to be inspected at one time, improving the scanning inspection efficiency and improving the reliability of the scanning inspection results.

[0093] The above are only exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A CT inspection system (100), characterized in that: include: A rotating bracket (3) is rotatably arranged; a scanning device (10), arranged on the rotating support (3), and comprising a radiation source (1) and a correspondingly arranged detection device (2); and Two groups of support devices (20) are arranged below the rotating bracket (3) and located on both sides of a vertical axis passing through the center of the rotating bracket (3), each group of support devices (20) comprises at least one support device (20), the support device (20) comprising a support beam (5) and a support wheel (4), the support beam (5) being arranged to be swingable, the support wheel (4) being arranged on the support beam (5) and in contact with the rotating bracket (3) to support the rotating bracket (3), wherein an angle a between a line connecting a swing center (7) of the support beam (5) and a center of a cross section of the rotating bracket (3) passing through the swing center (7) of the support beam (5) and a vertical axis passing through the center of the rotating bracket (3) is 20° to 60°; and / or an angle a between a line connecting a line connecting a line connecting a line connecting a cross section of the rotating bracket (3) passing through the swing center (7) of the support beam (5) and a vertical axis passing through the center of the rotating bracket (3) is adjustable.

2. The CT inspection system (100) according to claim 1, characterized in that: The angle a is between 40° and 60°; and / or the support device (20) is movable in the relative arrangement direction of the two groups of support devices (20), so that the angle a is adjustable.

3. The CT inspection system (100) according to claim 1, characterized in that: The rotating bracket (3) comprises a bracket body (31) and a rotating track (32); the rotating track (32) is arranged on the bracket body (31) and has at least one of a diameter, strength and hardness greater than that of the bracket body (31); and the supporting wheel (4) is in contact with the rotating track (32).

4. The CT inspection system (100) according to claim 3, characterized in that: The rotating bracket (3) comprises two rotating tracks (32), the two rotating tracks (32) are arranged at intervals along the axial direction of the rotating bracket (3), and the two groups of supporting devices (20) each comprise two supporting devices (20) respectively located below the two rotating tracks (32).

5. The CT inspection system (100) according to claim 4, characterized in that: The ratio between the diameter of the rotating track (32) and the axial distance between the two rotating tracks (32) is 10-0.

5.

6. The CT inspection system (100) according to claim 5, characterized in that: The ratio between the diameter of the rotating track (32) and the axial distance between the two rotating tracks (32) is 10-1.

7. The CT inspection system (100) according to any one of claims 1 to 6, characterized in that: The rotating bracket (3) comprises a plurality of supporting segments (33), wherein the plurality of supporting segments (33) are arranged along the circumference of the rotating bracket (3) and are detachably connected.

8. The CT inspection system (100) according to claim 7, characterized in that: The circumferences of the plurality of support segments (33) are equal or unequal; and / or the rotating bracket (3) comprises at least three support segments (33).

9. The CT inspection system (100) according to any one of claims 1 to 6, characterized in that: The support device (20) comprises one support wheel (4), wherein the support wheel (4) is arranged at the swing center (7) of the support beam (5); or the support device (20) comprises two groups of support wheels (4), wherein the two groups of support wheels (4) are arranged on both sides of the swing center (7) of the support beam (5), and each group of support wheels (4) comprises one or more support wheels (4).

10. The CT inspection system (100) according to any one of claims 1 to 6, characterized in that: The CT inspection system (100) comprises a power mechanism, the power mechanism being drivingly connected to the support wheel (4) so ​​as to drive the support wheel (4) to drive the rotating bracket (3) to rotate; and / or the rotating bracket (3) is arranged to be swingable.

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