Scanning component setting method and scanning component and scanning device

Abstract

This invention relates to the field of CT scanning equipment manufacturing, and discloses a method for setting up a scanning assembly, as well as the scanning assembly and scanning equipment thereof. The method includes: arranging two or more plate units with their edges adjacent to each other on the same arc located on a first plane P1, the central axes of the plate units intersecting at the first center O1 of the arc; drawing an inscribed circle with a second center O2 between the outermost two edge lines of the effective rays from the X-ray source and the projections of the plate surfaces of one or two of the middle plate units onto the first plane; drawing a perpendicular line L through the second center to the first plane; the X-ray source with the first center as its focal point and one or more plate units respectively forming a scanning unit; the scanning assembly includes at least two scanning units; the different scanning units rotating relative to each other around the perpendicular line L, so that any one scanning unit is outside the X-ray range of the other scanning unit. This invention effectively improves the scanning field of view, accuracy, and efficiency.

Description

Technical Field

[0001] The invention relates to the field of CT spiral scanning equipment manufacturing, and in particular to a method for setting a scanning component, a scanning component and a scanning equipment. Background Art

[0002] CT scanning technology has been widely used in the medical field due to its high sensitivity and accuracy. In addition to being used in the medical field, it has also been used for security inspections in public places in recent years. Existing security inspection equipment mainly uses ordinary X-ray machines, but they can only provide two-dimensional images of the plane, and because X-rays will be blocked by metal objects, they will cause blind spots in the field of vision. Compared with traditional X-ray machines, CT scanning can obtain clearer images and more accurate object density, so the application of CT scanning technology in security inspection will become a very important demand in the future. At present, some manufacturers have developed security inspection spiral CT systems based on traditional spiral scanning modes, which are installed and used in some international airports. In the future, the development direction is to gradually replace the existing ordinary X-ray machine security inspection system. However, this type of security inspection spiral CT is extremely expensive, and even the aviation system has certain cost constraints, and there are great obstacles to its large-scale popularization and application in other application fields. In addition, although the existing spiral CT scanning equipment has higher sensitivity and accuracy than traditional X-ray equipment, the scanning speed is slow, resulting in the accumulation of luggage and cargo, affecting the efficiency of security inspection. In order to save costs, another three-dimensional X-ray scanning device can be completed by a scanning unit including a radiation source and a detector plate through spin scanning. This technology is also called cone beam CT. However, although the cone beam CT solution is low-cost and high-efficiency, its coverage is limited. In order to obtain better scanning results, the detector plate can be spliced ​​by multiple plate units. Since each plate unit includes an effective pixel area in the middle part and an invalid area around the edges, ordinary splicing will cause a pixel-free area to appear in the connection part between the plate units, resulting in incomplete collected image data, thereby affecting image reconstruction. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems of slow spiral CT scanning speed and limited single-group scanning range of cone beam CT in the prior art, and to provide a method for setting up a scanning component and a scanning component and a scanning device. By setting at least two scanning units in the same scanning component, the problem of the influence of the invalid border of the edge of the detection plate on the reconstruction is avoided, thereby further improving the scanning field of view and accuracy of the scanning component and improving the scanning efficiency.

[0004] In order to achieve the above object, the present invention provides a method for setting a scanning component, the method comprising the following steps:

[0005] Step 100: Arrange two or more plate units on an arc A1 with a first center O1 on a first plane P1, with the edges of adjacent plate units adjacent to each other, and the central axes of the plate surfaces of all the plate units intersecting at the first center O1; draw an inscribed circle with a second center O2 between the edge lines of the two outermost sides of the projection of the effective rays of the ray source on the first plane P1 and the projection of the plate surface of one or two plate units located in the middle of the two or more plate units arranged on the same arc on the first plane P1; draw a perpendicular line L to the first plane P1 through the second center O2;

[0006] Step 200: The ray source with the first circle center O1 as the focus respectively forms a scanning unit with one of the plate units, two non-adjacent plate units, and multiple non-adjacent plate units according to the relative position relationship at this time; the scanning assembly includes two or more scanning units;

[0007] Step 300: Each of the scanning units includes a ray range formed with the focus of the ray source as the center and the plate surface of the plate unit as the bottom surface; the different scanning units constructed in step 200 are rotated with the vertical line L as the center, so that any one of the scanning units is outside the ray range of another scanning unit.

[0008] Preferably, the step 300 further comprises: when any one of the scanning units falls within the ray range of another scanning unit no matter how it rotates, one of the scanning units is translated by a predetermined interval M along the vertical line L relative to the other scanning unit.

[0009] Preferably, in step 300, when the projections of the focal points of the ray sources of any two scanning units on the first plane P1 coincide with each other, the predetermined interval M is the same as the length or span of the edge of the plate unit.

[0010] Preferably, in step 300, when the projections of the focal points of the ray sources of any two of the scanning units on the first plane P1 do not overlap, one of the scanning units is translated along the vertical line L by the predetermined interval M relative to the other scanning unit so that neither of the scanning units falls within the ray range of the other scanning unit.

[0011] Preferably, the edges of the adjacent plate units in step 100 are effective edges capable of receiving the radiation from the radiation source and forming an image; the plate surface of the plate unit is an effective plane formed on the plate unit and surrounded by the effective edges.

[0012] A second aspect of the present invention provides a scanning assembly configured by the configuration method as described above, comprising two or more scanning units, wherein the scanning unit comprises a radiation source and a detector plate configured corresponding to the radiation source, wherein the detector plate comprises one or more plate units, and the focus of the radiation source is located on an axis passing through the center of the plate unit and perpendicular to the plate surface of the plate unit; the relative positional relationship between any two scanning units includes:

[0013] When the number of the plate units in any two of the scanning units in the scanning assembly is the same, in the same scanning unit in the same scanning assembly, among the contour lines formed by the projection of the center line connecting the ray source and the plate unit on the first plane P1 where the ray range is located, a first inscribed circle T1 is formed between one of the outermost contour lines and the contour line formed by the projection of the straight line where the plate unit is located on the first plane P1, and the first inscribed circles T1 in any two of the scanning units overlap;

[0014] When the number of plate units in any two of the scanning units in the scanning assembly is different, in any two scanning units in the same scanning assembly, among the contour lines formed by the projection of the ray range of one of the scanning units on the first plane P1 where the center line connecting the ray source and the plate unit is located, a second inscribed circle T2 can be formed between the two outermost contour lines and the contour line formed by the projection of a straight line where one of the plate units of the other scanning unit is located on the first plane P1.

[0015] Preferably, any two scanning units in the scanning assembly are respectively a first scanning unit and a second scanning unit, the first scanning unit and the second scanning unit are respectively located at a first position and a second position, there is an angle difference between the second position and the first position when rotating around the center of the first inscribed circle or the second inscribed circle, and any one of the scanning units is outside the ray range of the other scanning unit.

[0016] Preferably, any two scanning units in the scanning assembly are respectively a first scanning unit and a second scanning unit, the first scanning unit comprises a first ray source and a first detector plate arranged corresponding to the first ray source, and the second scanning unit comprises a second ray source and a second detector plate arranged corresponding to the second ray source;

[0017] The projections of the focal points of the first ray source and the second ray source on the first plane P1 coincide with each other;

[0018] Alternatively, the projections of the foci of the first ray source and the second ray source on the first plane P1 do not overlap, and the distances between the projections of the foci of the first ray source and the second ray source on the first plane P1 and the line connecting the centers of the first inscribed circle T1 or the second inscribed circle T2 are equal;

[0019] A straight line passing through the first ray source and the center of the first detector plate is a first axis, a straight line passing through the second ray source and the center of the second detector plate is a second axis, and projections of the first axis and the second axis on the second plane are arranged in parallel at a predetermined interval M;

[0020] The first plane and the second plane are perpendicular to each other.

[0021] Preferably, the first detector plate and / or the second detector plate comprises at least two plate units arranged in parallel in the same direction, and two adjacent plate units are arranged at intervals.

[0022] Preferably, the plate unit is a flat plate or a curved plate.

[0023] Preferably, the bending direction of the curved plate surrounds the arrangement direction of the first ray source and the second ray source.

[0024] Preferably, the plate unit comprises an effective pixel area arranged at a central position and capable of receiving the radiation from the radiation source and forming an image, and an ineffective frame arranged around the periphery of the effective pixel area.

[0025] Preferably, the number of the plate units in the first detector plate and the second detector plate is both odd, both even, or a combination of odd and even.

[0026] Preferably, the first ray source and the second ray source are disposed on the same side of the first detector plate and the second detector plate, and the predetermined interval is the same as the length or width of an effective pixel area of ​​the plate unit.

[0027] Preferably, the ray range includes a cone with the focus of the ray source as the vertex and the effective pixel area as the base.

[0028] A third aspect of the present invention provides a scanning device, comprising a scanning platform and a scanning part arranged on the scanning platform, the scanning part comprising a circumferential rotating mechanism and a scanning component as described above arranged on the circumferential rotating mechanism, the scanning part and an object to be scanned placed on the scanning platform form a relative motion, the circumferential rotating mechanism drives the scanning component to move around the object to be scanned, while the object to be scanned passes through the space between the first ray source and the first detector plate and between the second ray source and the second detector plate.

[0029] Preferably, the scanning platform is provided with a motor and a conveying mechanism driven by the motor for placing the object to be scanned and driving the object to be scanned to move relative to the scanning platform;

[0030] Alternatively, a slide rail is provided on the scanning platform, and the orbiting rotating mechanism is arranged on the scanning platform via the slide rail, and the orbiting rotating mechanism moves relative to the object to be scanned placed on the scanning platform via the slide rail.

[0031] Through the above technical solution, the present invention sets at least two scanning units in the same scanning component, further improving the scanning field of view and accuracy of the scanning component and improving the scanning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 and Figure 2 Schematic diagram of step 100 and step 200 in the method for setting the scanning component of the present invention;

[0033] Figure 3 and Figure 4 It is a schematic diagram of the rotation structure in step 300 of the method for setting the scanning component of the present invention;

[0034] Figure 5 and Figure 6 Schematic diagram of the post-rotation interference structure in step 300 of the method for setting the scanning component of the present invention;

[0035] Figure 7 and Figure 8 Schematic diagram of the translation structure in step 300 of the method for setting the scanning component of the present invention;

[0036] Fig. 9 This is a schematic diagram of the overall configuration of the scanning assembly embodiment 1 of the present invention;

[0037] Fig.10 for Fig. 9 A-direction schematic diagram;

[0038] Fig.11 for Fig. 9 Schematic diagram of direction B;

[0039] Fig.12 This is a schematic diagram of the overall configuration structure of the second embodiment of the scanning component of the present invention;

[0040] Fig.13 for Fig.12 A-direction schematic diagram;

[0041] Fig.14 for Fig.12 Schematic diagram of direction B;

[0042] Fig.15 This is a schematic diagram of the overall configuration structure of the scanning component embodiment 3 of the present invention;

[0043] Fig.16 for Fig.15 A-direction schematic diagram;

[0044] Fig.17 for Fig.15 Schematic diagram of direction B;

[0045] Fig.18 This is a schematic diagram of the overall configuration structure of a fourth embodiment of a scanning assembly of the present invention;

[0046] Fig.19 for Fig.18 A-direction schematic diagram;

[0047] Fig. 20 for Fig.18 Schematic diagram of direction B;

[0048] Fig.21 A schematic diagram of a structure of a ray source and a detector plate including three plate units;

[0049] Fig. 22 It is a structural schematic diagram of the plate unit;

[0050] Fig.23 This is a schematic diagram of the overall configuration structure of a scanning component embodiment 5 of the present invention;

[0051] Fig.24 for Fig.23 A-direction schematic diagram;

[0052] Fig.25 for Fig.23 Schematic diagram of direction B;

[0053] Fig.26 This is a schematic diagram of the overall configuration structure of a scanning component embodiment 6 of the present invention;

[0054] Fig. 27 for Fig.26 A-direction schematic diagram;

[0055] Fig.28 for Fig.26 Schematic diagram of direction B;

[0056] Fig.29 This is a schematic diagram of the overall configuration structure of the scanning component embodiment 7 of the present invention;

[0057] Fig.30 for Fig.29 A-direction schematic diagram;

[0058] Fig.31 for Fig.29 Schematic diagram of direction B;

[0059] Fig.32 This is a schematic diagram of the overall configuration structure of the scanning component embodiment 8 of the present invention;

[0060] Fig.33 for Fig.32 A-direction schematic diagram;

[0061] Fig.34 for Fig.32 Schematic diagram of direction B;

[0062] Fig.35 This is a schematic diagram of the overall configuration structure of a ninth embodiment of a scanning assembly of the present invention;

[0063] Fig.36 It is a schematic diagram of the overall structure of a scanning device according to a first embodiment of the present invention;

[0064] Fig.37 It is a schematic diagram of the overall structure of the second embodiment of the scanning device of the present invention.

[0065] Description of Reference Numerals

[0066] 000 Radiation source 001 Plate unit 1 002 Plate unit 2 003 Plate unit 3 100 First scanning unit 110 First radiation source 120 First detector plate 120' Plate unit 121 Effective pixel area 122 Invalid border 130 First cone 200 Second scanning unit 210 Second radiation source 220 Second detector plate 230 Second cone P1 First plane P2 Second plane A1 Arc line T1 First inscribed circle T2 Second inscribed circle C1 First axis C2 Second axis M Predetermined interval a First effective edge b Second effective edge A First installation dimension B Second installation dimension H Vertical distance D Diameter O1 First center of circle O2 Second center of circle L Vertical line 1000 Scanning platform 2000 Scanning part 2010 Around rotation mechanism 3000 Object to be scanned 4000 Motor 5000 Conveying mechanism 6000 Sliding platform 7000 Shielding curtain 8000 Slide rail DETAILED DESCRIPTION

[0067] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0068] In the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to up, down, left, right shown in the reference drawings; "inside, outside" generally refer to inside and outside relative to the outline of each component itself; "far, near" generally refer to far or near relative to the outline of each component itself.

[0069] One aspect of the present invention provides a method for setting a scanning component, the method comprising the following steps:

[0070] Step 100: Arrange two or more plate units on an arc A1 with a first center O1 on a first plane P1, with the edges of adjacent plate units adjacent to each other, and the central axes of the plate surfaces of all the plate units intersecting at the first center O1. Figure 1 , Figure 2 As shown, the plate unit 1 001, the plate unit 2 002 and the plate unit 3 003 are arranged on an arc A1 with a first center O1 on the first plane P1, and the edges of adjacent plate units are adjacent to each other. An inscribed circle with a second center O2 is drawn between the edge lines of the two outermost sides of the effective ray of the ray source 000 and the projection of the plate surface of one or two of the two or more plate units arranged on the same arc on the first plane P1; a perpendicular line L is drawn through the second center O2 to the first plane P1. Figure 1 , Figure 2 As shown, take the outermost two rays of the effective rays of the ray source 000, that is, the rays on the leftmost side of the plate unit 1 001 and the rightmost side of the plate unit 3 003, and at the same time make an inscribed circle with a second center O2 between the projections of the plate surface of the plate unit 2 002 located in the middle on the first plane P1; make a perpendicular line L to the first plane P1 through the second center.

[0071] Step 200: The ray source with the first circle center O1 as the focus respectively forms a scanning unit with one of the plate units, two non-adjacent plate units, and multiple non-adjacent plate units according to the relative position relationship at this time; the scanning component includes two or more scanning units. Figure 1 , Figure 2 As shown, the plate unit 1 001 and the plate unit 3 003 and the ray source 000 constitute a scanning unit, and the plate unit 2 002 and the ray source 000 constitute another scanning unit. That is, in the Figure 1 , Figure 2The scanning assembly provided in the example includes two scanning units. It should be noted that the ray source 000 in the figure only indicates the position of the ray source 000 in step 100 and step 200, but does not indicate the number of ray sources 000. Each scanning unit includes a ray source, that is, there are as many ray sources as there are scanning units.

[0072] Step 300: Each of the scanning units includes a ray range formed with the focus of the ray source 000 as the center and the effective plane of the plate unit as the bottom surface; the different scanning units formed in step 200 are rotated with the vertical line L as the center, so that any scanning unit is outside the ray range of another scanning unit. Figure 3 and Figure 4 As shown, a scanning unit composed of plate unit 1 001 and plate unit 3 003 and ray source 000 remains stationary, and another scanning unit composed of plate unit 2 002 and ray source 000 rotates around the vertical line L. Figure 1 Rotate the position shown to Figure 3 , Figure 4 The position shown, and the plate unit of one of the two scanning units is outside the ray range of the other scanning unit.

[0073] Furthermore, during the rotation process, the following may occur: Figure 5 and Figure 6 In the situation shown in the figure, it is obvious that in this case, the plate unit 2 002 in the scanning unit composed of the plate unit 2 002 and the ray source 000 has fallen into the ray range of the scanning unit composed of the plate unit 1 001 and the plate unit 3 003 and the ray source 000. In this case, the scanning component cannot complete the normal scanning work. That is to say, the step 300 further includes: when any of the scanning units is rotated, the scanning unit will fall into the ray range of another scanning unit, in order to avoid Figure 5 and Figure 6 The situation shown in the figure occurs, one of the scanning units is translated relative to the other scanning unit along the vertical line L by a predetermined interval M, as shown in FIG. Figure 7 and Figure 8As shown. In practical applications, any one of the two scanning units can be used as a reference, and the other one can be moved along the vertical line L to form a predetermined interval M between the two. There are also multiple setting schemes for the distance of the predetermined interval M according to different settings. Preferably, in step 300, when the projections of the foci of the ray sources of any two scanning units on the first plane P1 coincide, the predetermined interval M is the same as the length or span of the edge of the plate unit. When the projections of the foci of the ray sources of any two scanning units on the first plane P1 do not coincide, one scanning unit is translated relative to the other scanning unit along the vertical line L by the predetermined interval M so that neither scanning unit falls within the ray range of the other scanning unit. In the case as Figure 8 In the embodiment shown, the scanning unit composed of the plate unit 2 002 and the ray source 000 is translated by a predetermined interval M along the vertical line L relative to the scanning unit composed of the plate unit 1 001 and the plate unit 3 003 and the ray source 000, and the translated position makes the outer contour lines of the projections on the second plane P2 of the right side of the ray range of the scanning unit composed of the plate unit 2 002 and the ray source 000 and the left side of the ray range of the scanning unit composed of the plate unit 1 001 and the plate unit 3 003 and the ray source 000 collinear with each other, that is, the ray ranges of the two are just adjacent to each other but do not interfere with each other. A more specific structure will be described in detail through specific embodiments.

[0074] It should be noted that, generally, the edges of the adjacent plate units in step 100 refer to effective edges that can receive the radiation from the radiation source and form an image; the plate surface is an effective plane formed on the plate unit and surrounded by the effective edges. In a specific embodiment, the specific structure of the plate unit will be described in detail in conjunction with the accompanying drawings.

[0075] A second aspect of the present invention provides a scanning assembly, comprising two or more scanning units, wherein the scanning unit comprises a radiation source and a detector plate arranged corresponding to the radiation source, wherein the detector plate comprises one or more plate units, and the focus of the radiation source is located on an axis passing through the center of the plate unit and perpendicular to the plate surface of the plate unit; the relative position relationship between any two scanning units includes:

[0076] When the number of the plate units in any two of the scanning units in the scanning assembly is the same, in the same scanning unit in the same scanning assembly, among the contour lines formed by the projection of the center line connecting the ray source and the plate unit on the first plane P1 where the ray range is located, a first inscribed circle T1 is formed between one of the outermost contour lines and the contour line formed by the projection of the straight line where the plate unit is located on the first plane P1, and the first inscribed circles T1 in any two of the scanning units overlap;

[0077] When the number of plate units in any two of the scanning units in the scanning assembly is different, in any two scanning units in the same scanning assembly, among the contour lines formed by the projection of the ray range of one of the scanning units on the first plane P1 where the center line connecting the ray source and the plate unit is located, a second inscribed circle T2 can be formed between the two outermost contour lines and the contour line formed by the projection of a straight line where one of the plate units of the other scanning unit is located on the first plane P1.

[0078] From the above-mentioned setting method of the scanning component, it can be known that the central axis of the first inscribed circle T1 or the second inscribed circle T2 is the vertical line L. The difference between the first inscribed circle T1 and the second inscribed circle T2 lies in that when the number of plates in any two scanning components is the same or different, the positions of the contour lines tangent to the first inscribed circle T1 and the second inscribed circle T2 and the plate units are different.

[0079] The various structures of the scanning assembly provided by the present invention are described in detail below in conjunction with specific embodiments.

[0080] Scanning component embodiment 1

[0081] In such Fig. 9 , Fig.10 Combined with Fig.11In the embodiment shown, any two scanning units in the scanning assembly are respectively the first scanning unit 100 and the second scanning unit 200, and the cone formed by taking the focus of the ray source as the center and the plate surface of the plate unit as the bottom surface is the ray range of the scanning unit. In this embodiment, there is a first inscribed circle T1 between the outermost contour line formed by the projection of the ray range of the first scanning unit 100 and the second scanning unit 200 on the first plane P1 and the contour line formed by the projection of the plate unit on the same first plane P1, and the first inscribed circles T1 of the first scanning unit 100 and the second scanning unit 200 coincide with each other. The first scanning unit 100 and the second scanning unit 200 are respectively located at the first position and the second position, and there is an angle difference between the second position and the first position, which is rotated around the center of the first inscribed circle T1, and the first scanning unit 100 is outside the ray range of the second scanning unit 200. . In this embodiment, the rotation angle is an acute angle, so that the position of the plate unit in the first scanning unit 100 and the second scanning unit 200 is outside the ray range of the second scanning unit 200 and the first scanning unit 100, thereby forming the scanning component in this embodiment.

[0082] Scanning component embodiment 2

[0083] This embodiment is a structural improvement based on the above embodiment 1. Fig.12 , Fig.13 Combined with Fig.14 As shown, in the scanning assembly provided in this embodiment, the first scanning unit 100 and the second scanning unit 200 are also any two scanning units in the scanning assembly, but the difference from the above-mentioned embodiment 1 is that in the two scanning units in this embodiment, the first scanning unit 100 includes a ray source and a correspondingly arranged detector plate, and the detector plate is composed of a plate body unit. The detector plate in the second scanning unit 200 is composed of two plate body units arranged at intervals. Therefore, Fig.13As shown, in this embodiment, the relative positions between the two outermost contour lines formed by the projection of the ray range of the second scanning unit 200 on the first plane P1 and the contour line formed by the projection of a straight line where a plate unit of the first scanning unit 100 is located on the same plane can form a second inscribed circle T2. Either the first scanning unit 100 or the second scanning unit 200 is kept stationary, and the other scanning unit is rotated by a certain angle with the central axis of the second inscribed circle T2, that is, the vertical line L as the center, so that the position where the plate unit of either the first scanning unit 100 or the second scanning unit 200 is located is outside the ray range of the other scanning unit, that is, the first scanning unit 100 and the second scanning unit 200 are located at the first position and the second position respectively, and there is an angle difference between the second position and the first position when rotating with the center of the second inscribed circle T2 as the center, so as to form a scanning component.

[0084] Scanning component embodiment 3

[0085] In such Fig.15 , Fig.16 Combined with Fig.17 In the illustrated embodiment, the present invention provides a scanning assembly, wherein any two scanning units in the scanning assembly are a first scanning unit 100 and a second scanning unit 200, wherein the first scanning unit 100 includes a first ray source 110 and a first detector plate 120 corresponding to the first ray source 110, and the second scanning unit 200 includes a second ray source 210 and a second detector plate 220 corresponding to the second ray source 210. Figures 15 to 17 In the illustrated embodiment, the projections of the foci of the first ray source 110 and the second ray source 210 on the first plane P1 do not overlap, the distances between the projections of the foci of the first ray source 110 and the second ray source 210 on the first plane P1 and the center of the first inscribed circle T1 are equal, and the first ray source 110 and the second ray source 210 are respectively arranged on different sides of the first detector plate 120 and the second detector plate 220. Fig.17 As shown, the straight line passing through the center of the first ray source 110 and the first detector plate 120 is the first axis C1, and the straight line passing through the center of the second ray source 210 and the second detector plate 220 is the second axis C2. The projections of the first axis C1 and the second axis C2 on the second plane P2 are arranged in parallel at a predetermined interval M; the first plane P1 and the second plane P2 are perpendicular to each other. Figures 15 to 17In the illustrated embodiment, since the first detector plate 120 and the second detector plate 220 are themselves arranged in parallel, the directions of the first symmetry center and the second symmetry center of the two detector plates are consistent. In other embodiments of the present invention, when the first detector plate 120 and the second detector plate 220 are not arranged in parallel, any one of the two detector plates can be selected as a reference, as long as the references selected for the first plane P1 and the second plane P2 are the same. In summary, in the scanning assembly provided in this embodiment, at least two scanning units each consisting of a radiation source and a detector plate are included, and the installation direction of the two scanning units is that the radiation source is arranged on opposite sides of the detector plate. Through the above-mentioned structural arrangement, the present invention arranges at least two scanning units in the same scanning assembly, further improving the scanning field of view and accuracy of the scanning assembly, and improving the scanning efficiency.

[0086] More specifically, in this embodiment, if Fig.17 As shown, the first ray source 110 and the second ray source 210 are respectively arranged on different sides of the first detector plate 120 and the second detector plate 220, and the rays emitted by the first ray source 110 form a first cone 130 above the first detector plate 120 with the focus of the first ray source 110 as the vertex and the edge of the effective pixel area 121 of the first detector plate 120 as the square bottom surface, and the rays emitted by the second ray source 210 form a second cone 230 above the second detector plate 220 with the focus of the second ray source 210 as the vertex and the outer edge of the invalid frame 122 of the second detector plate 220 as the square bottom surface, and when the outer contour lines of one side of the projections of the first cone 130 and the second cone 230 on the second plane P2 are at least partially collinear, the distance between the centers of the first ray source 110 and the second ray source 210 is the predetermined interval M. It should be noted that the reason why the bottom surface of the first cone 130 is set as the edge of the effective pixel area of ​​the first detector plate 120, and the bottom surface of the second cone 230 is set as the outer edge of the invalid frame of the second detector plate 220, is to prevent the ray interference on the effective pixel generated when both have the edge of the effective pixel area of ​​the corresponding detector plate as the bottom surface; and when the bottom surfaces of the two are the same, the outline of the ray will also be limited to the same size square field of view, and useless rays will cause redundant radiation.

[0087] Scanning component embodiment 4

[0088] In such Fig.18 , Fig.19 Combined with Fig. 20In the illustrated embodiment, the scanning assembly provided by the present invention is an improvement on the above-mentioned embodiment 1. Specifically, in this embodiment, any two scanning units in the scanning assembly are also two scanning units, namely a first scanning unit 100 and a second scanning unit 200. However, the difference from the above-mentioned embodiment 1 is that, in order to further improve the scanning field of view and accuracy, in this embodiment, the two scanning units, the first scanning unit 100 still uses a ray source plus a detector plate corresponding to the ray source, while the second scanning unit 200 uses a ray source plus a detector plate corresponding to the ray source, which includes two plate units 120' arranged in parallel in the same direction, and the two plate units 120' constituting the second scanning unit 200 are arranged at intervals. Comparison Fig.21 As shown, if a scanning unit is set as a structure of a ray source and a detector plate including three plate units 120', theoretically, the scanning field of view and clarity of the scanning unit can also be improved. Fig. 22 As shown, each plate unit 120' includes an effective pixel area 121 arranged at a central position and capable of receiving the rays from the ray source and forming an image, and an invalid border 122 arranged around the effective pixel area 121. Therefore, the ray range mentioned in the present invention is a cone with the focus of the ray source as the vertex and the effective pixel area as the bottom. It should also be noted that the plate surface of the plate unit includes an upper surface and a lower surface, and the side of the plate unit facing the ray source and capable of receiving the rays emitted by the ray source is the input surface. The above-mentioned effective pixel area 121 and invalid border 122 are both located on the input surface of the plate unit. When the plate unit 120' is arranged as shown in the following Fig.21 When the structures shown are arranged together, the connection part between two adjacent plate units 120' has a pixel-free area due to the existence of the invalid border 122, resulting in incomplete image data collected, thereby affecting image reconstruction. Figures 18 to 20 And compare Fig.21 As shown, in this embodiment, the present invention is Fig.21 The middle plate unit 120' of the three plate units 120' shown in the figure is longitudinally flipped 180° based on the original position and a radiation source is arranged corresponding to the flipped plate unit, and the radiation sources of the first scanning unit 100 and the second scanning unit 200 are arranged in parallel at a predetermined interval M. Therefore, the present invention improves the field of view and accuracy of scanning by increasing the number of plate units constituting the detector plate, without being affected by the invalid border 122 without pixels in the plate unit 120'.

[0089] Scanning Component Embodiment 5

[0090] In such Fig.23 , Fig.24 Combined with Fig.25 In the embodiment shown, a scanning assembly provided by the present invention is an improvement on the above-mentioned embodiment 2. Specifically, in this embodiment, the first scanning unit 100 and the second scanning unit 200 are also any two scanning units in one scanning assembly, but the difference from the above-mentioned embodiment 4 is that, in order to further improve the scanning field of view and accuracy, the two scanning units in this embodiment both use a ray source and a detector plate including two plate units 120' arranged in parallel in the same direction and arranged corresponding to the ray source.

[0091] Similarly, in order to prevent the pixel-free areas of each plate unit from affecting the image formation, the two plate units 120' arranged in parallel in each scanning unit are not directly adjacent to each other, but are arranged at an interval. At the same time, the radiation sources of the first scanning unit 100 and the second scanning unit 200 are arranged in parallel at a predetermined interval M.

[0092] It can be seen from the above three embodiments that the scanning assemblies provided in the above three embodiments of the present invention all include at least two scanning units each consisting of a ray source and a detector plate, and the installation direction of the two scanning units is that the ray sources are arranged on different sides of the detector plate, and the projections of the focal points of the two ray sources on the first plane P1 do not overlap. Fig.15 , Fig.18 and Fig.23 The B direction is staggered and arranged in parallel according to a predetermined interval M in the B direction. Fig.24 As shown, the first radiation source 110 and the second radiation source 210 are as follows. Fig.15 , Fig.18 and Fig.23 The setting method in the A direction is described in detail. Specifically, Fig.15 Combined with Fig.16 , Fig.18 Combined with Fig.19 , Fig.23 Combined with Fig.24As shown, since the detector plate can be composed of one plate unit or multiple plate units, in the above three embodiments, the fourth and fifth embodiments both include a detector plate composed of two plate units. Normally, each plate unit 120' includes an effective pixel area 121 arranged at a central position and an invalid border 122 surrounding the effective pixel area 121. If the two effective edges of the effective pixel area of ​​the square plate unit are respectively recorded as the first effective edge a and the second effective edge b, the corresponding physical dimensions, that is, the installation dimensions are respectively recorded as the first installation dimension A and the second installation dimension B. When there are multiple plate units arranged in parallel, each plate unit 120' is arranged at intervals along the second effective edge b, and the vertical distance from the focus of the radiation source to the plate unit 120' is recorded as H. If the total number of plate units 120' is an odd number greater than 1, for example: in the above fourth embodiment, as Fig.19 As shown, the two scanning units include a total of three plate units. The contour line of the outermost effective ray of the ray cone formed by the two outermost plate units and the plate plane of the middle plate unit are taken as the projection of the first plane P1 to make an inscribed circle, which is the maximum scanning field of view. The diameter is recorded as D and the center of the circle is recorded as point O1. If the total number of plate units is an even number, for example: in the above embodiment 5, as Fig.24 As shown, the two scanning units include a total of four plate units. An inscribed circle is made between the contour lines of the outermost effective rays of the ray cone formed by the two outermost plate units and the projections of the plate planes of the two middle plate units on the first plane P1. This is the maximum scanning field of view. The diameter is denoted as D and the center of the circle is denoted as point O1.

[0093] Combination Fig.18 and Fig.19 As shown, if according to Fig.19 As shown, the plate units are arranged in order from left to right as the first, second and third, a ray source and an even-numbered plate unit, i.e., the second plate unit, are fixed as the first scanning unit 100; a ray source and an odd-numbered plate unit, i.e., the first and third plate units, are fixed as the second scanning unit 200. Fig.18 As shown, the setting position of the first scanning unit 100 and the setting position of the second scanning unit 200 are rotated 180° with respect to the vertical line L passing through the point O1 and perpendicular to the tangent circle as the center, thereby forming the scanning component in the fourth embodiment.

[0094] The focus of the ray source 110 of the first scanning unit 100 and the plate unit in the first scanning unit 100 form a cone with the bottom side lengths of the first effective edge a and the second effective edge b and the height of the vertical distance H. The focus of the ray source 210 of the second scanning unit 200 and the plate unit in the second scanning unit 200 form two cones with the bottom side lengths of the first installation dimension A and the second installation dimension B and the height of the vertical distance H. The first installation dimension A and the second installation dimension B include the first effective edge a and the second effective edge b and the outer edge of the invalid border. The first scanning unit 100 is translated relative to the second scanning unit 200 along the vertical line L, or the second scanning unit 200 is translated relative to the first scanning unit 100 along the vertical line L, such as Fig. 20 As shown, the respective outer contours of the projections of the cone of the first scanning unit 100 and at least part of the cone of the second scanning unit 200 on the second plane P2 are at least partially collinear with each other. At this time, the position difference between the first scanning unit 100 and the second scanning unit 200 is the minimum distance of translation, that is, the axial distance of the system is the shortest, that is, the predetermined interval M between the ray sources of the first scanning unit 100 and the second scanning unit 200 arranged in parallel.

[0095] In addition, it can be seen from the above three embodiments that the number of plate units in the first detector plate 120 and the second detector plate 220 can be arranged in various combinations, for example, they can be odd numbers as in the first embodiment, even numbers as in the third embodiment, or a combination of odd numbers and even numbers as in the second embodiment.

[0096] Scanning Component Embodiment 6

[0097] In such Fig.26 , Fig. 27 Combined with Fig.28In the illustrated embodiment, a scanning assembly provided by the present invention is an improvement on the above-mentioned embodiment 1. Specifically, in this embodiment, any two scanning units included in a scanning assembly are: a first scanning unit 100 and a second scanning unit 200, each of which is composed of a ray source and a detector plate corresponding thereto, but the difference from the above-mentioned embodiment 1 is that the first ray source 110 and the second ray source 210 are simultaneously arranged on the same side of the first detector plate 120 and the second detector plate 220, and the projections of the focal points of the two ray sources on the first plane P1 coincide. The first ray source 110 and the second ray source 210 are arranged in parallel at a predetermined interval M, and the predetermined interval M is the same as the length or width of the effective pixel area of ​​the plate unit constituting the first detector plate 120 and the second detector plate 220. In practical applications, whether the predetermined interval M is the same as the length or the width depends on the arrangement position of the plate unit, and generally refers to the length of the effective pixel area of ​​the side length of the plate units adjacent to each other.

[0098] Scanning component embodiment seven

[0099] like Fig.29 , Fig.30 Combined with Fig.31 The embodiment shown is a modified structure based on the sixth embodiment. Specifically, in this embodiment, any two scanning units in a scanning assembly are: a first scanning unit 100 and a second scanning unit 200. However, the difference from the sixth embodiment is that one of the detector plates in the two scanning units includes only one plate unit, and the other includes two plate units. The first ray source 110 and the second ray source 210 are simultaneously arranged on the same side of the first detector plate 120 and the second detector plate 220, and the projections of the focal points of the two ray sources on the first plane P1 overlap. The first ray source 110 and the second ray source 210 are arranged in parallel at a predetermined interval M, and the predetermined interval M is the same as the length or width of the effective pixel area of ​​the plate units constituting the first detector plate 120 and the second detector plate 220.

[0100] Scanning Component Embodiment 8

[0101] like Fig.32 , Fig.33 Combined with Fig.34The embodiment shown is a modified structure based on the sixth embodiment. Specifically, in this embodiment, any two scanning units in a scanning assembly are: a first scanning unit 100 and a second scanning unit 200. However, the difference from the sixth embodiment is that the detector plates in the two scanning units include two plate units. The first ray source 110 and the second ray source 210 are simultaneously arranged on the same side of the first detector plate 120 and the second detector plate 220, and the projections of the focal points of the two ray sources on the first plane P1 coincide. The first ray source 110 and the second ray source 210 are arranged in parallel at a predetermined interval M, and the predetermined interval M is the same as the length or width of the effective pixel area of ​​the plate units constituting the first detector plate 120 and the second detector plate 220.

[0102] It can be seen from the above three embodiments that the scanning assemblies provided in the above three embodiments of the present invention all include at least two scanning units each consisting of a ray source and a detector plate, and the installation direction of the two scanning units is that the ray sources are arranged on the same side of the detector plate, and the projections of the focal points of the two ray sources on the first plane P1 overlap. Fig. 27 , Fig.30 and Fig.33 As shown in , when the number of flat panel units is multiple, all flat panel units are arranged in parallel, the effective edges of each flat panel unit are arranged at intervals, and the vertical distance from the focus of the ray source to the plate surface of the flat panel unit is the same. If the number of flat panel units is odd, such as Fig.30 The number of flat panel units shown is three. The inscribed circle between the outermost effective rays of the ray cone formed by the two outermost panel units and the projection of the panel plane of the middle panel unit on the first plane P1 is the maximum scanning field of view. If the number of flat panel units is an even number, such as Fig. 27 and Fig.33 As shown, the number of settings is two and four respectively, and an inscribed circle is drawn between the outermost effective rays of the ray cone formed by the two outermost plate units and the projection of the plate planes of the two middle plate units on the first plane P1, which is the maximum scanning field of view. In summary, for the scanning assembly in which the ray source is set on the same side of the detector plate, the relative position between the two scanning units is determined by the above method. The ray sources in the two scanning units are arranged in parallel at a predetermined interval M, and the predetermined interval M is the same as the length or width of the effective pixel area of ​​the plate units of the two detector plates. As mentioned above, the specific length or width is related to the actual setting direction of the plate units. In addition, combined with Fig.29 and Fig.32 As shown, when there are multiple plate units in the scanning unit, the arrangement positions of the plate units in two scanning units are staggered with each other.

[0103] Scanning component embodiment 9

[0104] like Fig.35 The embodiment shown is a modified structure based on the third embodiment. Specifically, in this embodiment, a scanning assembly includes any two scanning units: a first scanning unit 100 and a second scanning unit 200. However, the difference from the third embodiment is that the detector plates in the two scanning units are not flat plate units with a straight plate surface, but flat plate units with a curved plate surface, and the curved direction of the curved plate surrounds the setting direction of the first ray source 110 and the second ray source 210. The curved plate unit also includes an effective pixel area set at the center and an invalid frame surrounding the effective pixel area.

[0105] It should be noted that Fig.35 The structure in is only an example. The scanning assembly composed of flat plate units in the shape of curved panels can also realize various setting combinations according to the above-mentioned embodiments 1 to 8. However, no matter how the number and shape of the flat plate units are set, the core of the structural layout is to use the inscribed circle method to obtain the maximum scanning field of view. In order to avoid the influence of the invalid border when installed in the same direction, the spaced flat plates need to be axially offset, and the offset distance is equal to the actual length or width of the flat plate. When installed in the reverse direction, the spaced flat plates and the corresponding ray sources need to be rotated 180° along the axis of the maximum scanning field of view circle and offset. The actual required offset distance can also be determined by the inscribed circle and the projection of the outermost contour line of the ray range formed by the rays emitted by the ray source above the plate unit on the second plane P2, which is at least partially collinear. More detailed content is described in detail in the above-mentioned embodiments 1 to 8. Please refer to the above content and it will not be repeated here.

[0106] Scanning device embodiment 1

[0107] like Fig.36As shown, the third aspect of the present invention provides a scanning device, including a scanning platform 1000 and a scanning unit 2000 arranged on the scanning platform 1000, the scanning unit 2000 includes a circumferential rotating mechanism 2010 and the scanning component as described above arranged on the circumferential rotating mechanism 2010, the scanning unit 2000 forms a relative motion with an object 3000 to be scanned placed on the scanning platform 1000, and while the circumferential rotating mechanism 2010 drives the scanning component to circumferentially move the object 3000 to be scanned, the object 3000 to be scanned passes through the space between the first ray source 110 and the first detector plate 120 and between the second ray source 210 and the second detector plate 220. Specifically, in order to realize the relative movement between the scanning unit 2000 and the object to be scanned 3000 placed on the scanning platform 1000, in this embodiment, a motor 4000 and a transmission mechanism 5000 driven by the motor 4000 are provided on the scanning platform 1000, the object to be scanned 3000 is placed on the transmission mechanism 5000, and the rotating mechanism 2010 is fixed on the scanning platform 1000. In addition to the above core components, Fig.21 As shown, in order to facilitate the smooth transition between the object 3000 to be scanned and the conveying mechanism 5000, sliding platforms 6000 are further provided on both sides of the scanning platform 1000, so that the object 3000 to be scanned can smoothly enter the conveying mechanism 5000 for scanning before and after scanning and be output from the conveying mechanism 5000. In order to effectively prevent radiation contamination, shielding curtains 7000 are further provided at the entrance and exit of the scanning platform 1000, which are usually lead curtains.

[0108] Specifically, the scanning device provided by the present invention mainly comprises Fig.36 The scanning device is mainly used for baggage security inspection, in which the object to be scanned 3000 is baggage. The entire structure is enclosed in a lead box, and only the exit and entrance of the baggage are retained at the sliding platform 6000. The exit and entrance are equipped with lead curtains. In this embodiment, the ray source is a tube. The conveying mechanism 5000 uses a high-strength plastic guide chain. More specifically, the high-strength plastic guide chain also includes a driving unit, such as: a slide rail, a slider and a synchronous belt, a driving motor, etc. The two guide chain synchronous belts on both sides are driven by the same motor, which can ensure that the guide chain does not twist during the sliding process. The high-strength plastic guide chain can ensure that the luggage will not vibrate up and down during the dragging process, and can also reduce the attenuation of x-rays. As Fig.36As shown, the guide chain moves toward the left side of the scanning platform 1000, driving the luggage to pass through the scanning area at a uniform speed. The entrance sliding platform 6000 is responsible for dragging the luggage onto the high-strength plastic guide chain, and the exit sliding platform 6000 is responsible for dragging the luggage on the high-strength plastic guide chain away from the equipment. The guide chain on the lower layer moves toward the right direction, forming a ring with the upper layer guide chain, and performs circular sliding. The guide chain slides synchronously with the entrance and exit sliding platforms 6000. In the actual process of luggage inspection, a luggage detector can be set to detect whether the luggage on the guide chain enters the scanning area. When entering the scanning area, the x-ray is started to scan and collect images. A shielding curtain detector can also be set to detect whether the shielding curtain 7000 at the entrance and exit of the luggage is closed. During the x-ray scanning process, the shielding curtain must be kept in a closed state to avoid radiation leakage.

[0109] It should be noted that the above content only involves Fig.36 The contents shown in the drawings include, but are not limited to, the structural settings described in the above scanning component embodiments 1 to 9. In practical applications, other structural combinations can be made based on the above setting principles as needed, all of which fall within the scope of protection of the present invention. In addition, the main contents to be protected by the present invention are the structure and setting method of the scanning component set in the scanning device, as well as other mechanisms and components included in the scanning device to complete the scanning work, such as: controller, computer data processor, data detection and acquisition device, data storage device, input device, display device and output device, etc., which are similar to the corresponding parts in the existing equipment and will not be described one by one here.

[0110] Scanning device embodiment 2

[0111] like Fig.37 As shown, the scanning device provided in this embodiment is a modified structure of the above-mentioned scanning device embodiment 1. Specifically, the relative movement between the scanning unit 2000 and the object to be scanned 3000 placed on the scanning platform 1000 is also realized. In the scanning device embodiment 1, it is realized by the transmission mechanism 5000, while in this embodiment, a slide rail 8000 is provided on the scanning platform 1000, and the surrounding rotation mechanism 2010 is arranged on the scanning platform 1000 through the slide rail 8000. While driving the scanning component to surround the object to be scanned 3000, the surrounding rotation mechanism 2010 moves relative to the scanning platform 1000 through the slide rail 8000, thereby realizing the scanning operation of the object to be scanned 3000. According to the space size of the installation site of the scanning device and the needs of the scanning process, the movement of the slide rail 8000 relative to the scanning platform 1000 can be either unidirectional or reciprocating.

[0112] Similarly, the scanning component includes but is not limited to the structural settings described in the above scanning component embodiments 1 to 9. In practical applications, other structural combinations can be made based on the above setting principles as needed, all of which fall within the scope of protection of the present invention. Other technical features are not described in detail here.

[0113] In summary, the scanning assembly setting method and scanning assembly and scanning device provided by the present invention, regardless of the number of plate units constituting the detector plate, all use the inscribed circle method to obtain the maximum scanning field of view. According to the different number of plate units, different positions are selected to form the inscribed circle, and by relative rotation and displacement between different scanning units in the same scanning assembly, the plate units in any scanning unit in the same scanning assembly will not fall within the radiation range of other scanning units. More specifically, the specific structure when the relative installation positions of the radiation source and the plate unit are different is listed in the embodiment. In order to avoid the influence of the invalid frame of the plate unit radiation when installing in the same direction, the spaced plate units need to be axially staggered, and the distance of the staggered is equal to the actual effective length or width of the plate unit. When installing in the opposite direction, the spaced plate units and the corresponding radiation sources need to be rotated along the axis of the maximum scanning field of view circle and staggered. There can be many rotation angles, but the ones listed in the above embodiment are only relatively special positions, such as: rotating 180°. The actual required offset distance can also be set in a manner that the outer contour lines of the projections of the ray ranges formed by the ray sources in different scanning components on the plate unit on the second plane P2 are at least partially collinear. The present invention, through the above-mentioned setting method and specific structure, sets at least two scanning units in the same scanning component, further improving the scanning field of view and accuracy of the scanning component and improving the scanning efficiency.

[0114] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention. For example, the flat plate forming the detector plate can be changed into a curved plate, and the number of flat plate units constituting the detector plate can be greater. In order to avoid unnecessary repetition, the present invention will not further explain various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A method for setting a scanning component, characterized in that: The setting method comprises the following steps: Step 100: Arrange two or more plate units on an arc (A1) with a first center (O1) located on a first plane (P1), with the edges of adjacent plate units adjacent to each other, and the central axes of the plate surfaces of all the plate units intersecting at the first center (O1); draw an inscribed circle with a second center (O2) between the edge lines of the two outermost sides of the projection of the effective rays of the ray source on the first plane (P1) and the projection of the plate surface of one or two plate units located in the middle of two or more plate units arranged on the same arc on the first plane (P1); draw a perpendicular line (L) to the first plane (P1) through the second center (O2); Step 200: A ray source with the first circle center (O1) as a focus and one of the plate units, two non-adjacent plate units, and multiple non-adjacent plate units respectively form a scanning unit according to the relative position relationship between the ray source and the plate defined in step 100; the scanning assembly includes two or more scanning units; Step 300: Each of the scanning units includes a ray range formed with the focus of the ray source as the center and the plate surface of the plate unit as the bottom surface; the different scanning units constructed in step 200 are rotated with the vertical line (L) as the center, so that any one of the scanning units is outside the ray range of another scanning unit.

2. The method for setting a scanning component according to claim 1, characterized in that: The step 300 further includes: when any one of the scanning units falls within the ray range of another scanning unit no matter how it rotates, one of the scanning units is translated relative to the other scanning unit along the vertical line (L) by a predetermined interval (M).

3. The method for setting up a scanning component according to claim 2, characterized in that: In step 300, when the projections of the focal points of the ray sources of any two scanning units on the first plane (P1) coincide, the predetermined interval (M) is the same as the length or span of the edge of the plate unit.

4. The method for setting a scanning component according to claim 2, characterized in that: In step 300, when the projections of the focal points of the radiation sources of any two scanning units on the first plane (P1) do not overlap, one of the scanning units is translated relative to the other scanning unit along the vertical line (L) by the predetermined interval (M) so that neither scanning unit falls within the radiation range of the other scanning unit.

5. The method for setting a scanning component according to claim 1, characterized in that: In step 100, the edges of the adjacent plate units are effective edges that can receive the radiation from the radiation source and form an image; the plate surface of the plate unit is an effective plane formed on the plate unit and surrounded by the effective edges.

6. A scanning component configured by the configuration method according to any one of claims 1 to 5, characterized in that: The device comprises two or more scanning units, wherein the scanning unit comprises a radiation source and a detector plate arranged corresponding to the radiation source, wherein the detector plate comprises one or more plate units, and the focus of the radiation source is located on an axis passing through the center of the plate unit and perpendicular to the plate surface of the plate unit; The relative position relationship between any two scanning units includes: When the number of plate units in any two of the scanning units in the scanning assembly is the same, in the same scanning unit in the same scanning assembly, among the contour lines formed by the projection of the ray range on the first plane (P1) where the center line connecting the ray source and the plate unit is located, a first inscribed circle (T1) is formed between one of the outermost contour lines and the contour line formed by the projection of the straight line where the plate unit is located on the first plane (P1), and the first inscribed circles (T1) in any two of the scanning units overlap; when the number of plate units in any two of the scanning units in the scanning assembly is different, in any two of the scanning units in the same scanning assembly, among the contour lines formed by the projection of the ray range of one of the scanning units on the first plane (P1) where the center line connecting the ray source and the plate unit is located, a second inscribed circle (T2) can be formed between the two outermost contour lines and the contour line formed by the projection of the straight line where the plate unit is located in the other scanning unit on the first plane (P1).

7. The scanning assembly according to claim 6, characterized in that: Any two scanning units in the scanning component are respectively a first scanning unit (100) and a second scanning unit (200); the first scanning unit (100) and the second scanning unit (200) are respectively located at a first position and a second position; there is an angle difference between the second position and the first position when rotating around the center of the first inscribed circle or the second inscribed circle; and any one of the scanning units is outside the ray range of the other scanning unit.

8. The scanning assembly according to claim 6, characterized in that: Any two scanning units in the scanning assembly are respectively a first scanning unit (100) and a second scanning unit (200), the first scanning unit (100) comprising a first ray source (110) and a first detector plate (120) arranged corresponding to the first ray source (110), and the second scanning unit (200) comprising a second ray source (210) and a second detector plate (220) arranged corresponding to the second ray source (210); The projections of the focal points of the first ray source (110) and the second ray source (210) on the first plane (P1) overlap; Alternatively, the projections of the foci of the first ray source (110) and the second ray source (210) on the first plane (P1) do not overlap, and the distances between the projections of the foci of the first ray source (110) and the second ray source (210) on the first plane (P1) and the center of the first inscribed circle (T1) or the second inscribed circle (T2) are equal; A straight line passing through the center of the first ray source (110) and the first detector plate (120) is a first axis (C1), a straight line passing through the center of the second ray source (210) and the second detector plate (220) is a second axis (C2), and projections of the first axis (C1) and the second axis (C2) on a second plane (P2) are arranged in parallel at a predetermined interval M; The first plane (P1) and the second plane (P2) are perpendicular to each other.

9. The scanning assembly according to claim 8, characterized in that: The first detector plate (120) and / or the second detector plate (220) comprises at least two plate units (120') arranged in parallel in the same direction, and two adjacent plate units (120') are arranged at intervals.

10. The scanning assembly according to claim 8, characterized in that: The plate unit (120') is a flat plate or a curved plate.

11. The scanning assembly according to claim 10, characterized in that: The bending direction of the curved plate surrounds the arrangement direction of the first ray source (110) and the second ray source (210).

12. The scanning assembly according to claim 10, characterized in that: The plate unit (120') comprises an effective pixel area (121) arranged at a central position and capable of receiving radiation from the radiation source and forming an image, and an ineffective frame (122) arranged around the periphery of the effective pixel area (121).

13. The scanning assembly according to claim 9, characterized in that: The number of the plate units (120') in the first detector plate (120) and the second detector plate (220) is either an odd number, an even number, or a combination of an odd number and an even number.

14. The scanning assembly according to claim 12, characterized in that: The first ray source (110) and the second ray source (210) are simultaneously arranged on the same side of the first detector plate (120) and the second detector plate (220), and the predetermined interval (M) is the same as the length or width of the effective pixel area (121) of the plate unit (120').

15. The scanning assembly according to claim 12, characterized in that: The ray range includes a cone with the focus of the ray source as the vertex and the effective pixel area as the base.

16. A scanning device, comprising a scanning platform (1000) and a scanning unit (2000) arranged on the scanning platform (1000), characterized in that: The scanning section (2000) comprises a circumferential rotating mechanism (2010) and a scanning component according to any one of claims 6 to 15 arranged on the circumferential rotating mechanism (2010); a relative motion is formed between the scanning section (2000) and an object to be scanned (3000) placed on the scanning platform (1000); while the circumferential rotating mechanism (2010) drives the scanning component to move around the object to be scanned (3000), the object to be scanned (3000) passes through the space between the first ray source (110) and the first detector plate (120) and between the second ray source (210) and the second detector plate (220).

17. The scanning device according to claim 16, characterized in that The scanning platform (1000) is provided with a motor (4000) and a conveying mechanism (5000) driven by the motor (4000) and used for placing the object to be scanned (3000) and driving the object to be scanned (3000) to move relative to the scanning platform (1000); Alternatively, a slide rail (8000) is provided on the scanning platform (1000), the orbiting rotation mechanism (2010) is arranged on the scanning platform (1000) via the slide rail (8000), and the orbiting rotation mechanism (2010) moves relative to the object (3000) to be scanned placed on the scanning platform (1000) via the slide rail (8000).

Images