Ray detector

Abstract

The utility model discloses a ray detector, comprising a first detection module comprising a first flat plate provided with a first through hole, a first plate surface and a second plate surface opposite to the first plate surface; the first scintillator is arranged on the first plate surface; the second detection module comprises a second flat plate and is provided with a third plate surface which is parallel to the first plate surface and is opposite to the second plate surface; the second scintillator is arranged on the third plate surface; the connecting assembly comprises a first bolt, the first bolt comprises a first screw penetrating through the first through hole and a first head connected to one end of the first screw, the first head abuts against the first plate face, and the end, back on to the first head, of the first screw abuts against the third plate face; the first screw is sleeved with the nut, and the first flat plate is clamped between the first head and the nut. According to the ray detector, pixel alignment of the first detection module and the second detection module can be well realized, and the imaging performance is high.

Description

Technical Field

[0001] The utility model relates to a ray detection technology, and more specifically, to a ray detector. Background Art

[0002] Usually, a dual-energy radiation detector is composed of high- and low-energy detection modules. After the radiation passes through the irradiated object, part of the radiation is absorbed by the low-energy detection module and converted into electronic signal output. After the unabsorbed radiation enters the high-energy module, it will be detected by the high-energy detection module and converted into electronic signal output. In this way, a dual-energy image with a high recognition rate is collected.

[0003] This type of dual-energy detector generally adopts an upper and lower structure, with the low-energy detection module close to the side of the object to be detected, and the high and low-energy detection modules are assembled together through pads, screws, etc. However, due to the height error of the pads and the thickness tolerance of the low-energy detection module circuit board, the distance between the high and low energy scintillators is unstable and the overall tolerance is large, which greatly affects the image quality of some special applications. In addition, this type of dual-energy detector requires the pixels of the high and low energy detection modules to be precisely aligned, which makes assembly difficult, costly, and has a low yield. Utility Model Content

[0004] The present invention provides a radiation detector, which includes:

[0005] The first detection module comprises

[0006] A first flat plate is provided with a first through hole, a first plate surface and a second plate surface opposite to the first plate surface; and,

[0007] A first scintillator, disposed on the first plate surface;

[0008] The second detection module includes

[0009] A second flat plate is provided with a third plate surface which is parallel to the first plate surface and is arranged opposite to the second plate surface; and,

[0010] A second scintillator is arranged on the third plate surface;

[0011] Connectivity components, including

[0012] A first bolt includes a first screw rod passing through the first through hole and a first head connected to one end of the first screw rod, the first head rod abuts against the first plate surface, and an end of the first screw rod facing away from the first head rod abuts against the third plate surface;

[0013] a nut, which is sleeved on the first screw rod, wherein the first flat plate is sandwiched between the first head and the nut; and

[0014] A fastener is used to fix the first screw rod to the first plate.

[0015] In an exemplary embodiment, the second plate is provided with a second through hole coaxial with the first through hole, and the inner diameter of the second through hole is smaller than the outer diameter of the first screw;

[0016] The first screw rod is provided with a screw hole, and the screw hole extends from an end of the first screw rod facing away from the first head portion toward the first head portion;

[0017] The fastener comprises a second screw rod passing through the second through hole and screwed into the screw hole, and a second head connected to one end of the second screw rod;

[0018] Wherein, the second flat plate is clamped between the second head and the first screw.

[0019] In an exemplary embodiment, the connection assembly further includes a gasket, which is sleeved on the second screw rod and clamped between the second head and the second plate.

[0020] In an exemplary embodiment, the end surface of the first head abutting against the first plate and the end surface of the first screw abutting against the second plate are both planes perpendicular to the axis of the first screw.

[0021] In an exemplary embodiment, the first scintillator and the second scintillator are aligned in a direction perpendicular to the first flat plate.

[0022] In an illustrative embodiment, a plurality of the connecting components are provided, and the plurality of connecting components are respectively provided on two opposite sides of the first scintillator and on two opposite sides of the second scintillator.

[0023] In an illustrative embodiment, the radiation detector further includes a filter, wherein the filter is located between the first scintillator and the second scintillator;

[0024] The filter plate is provided with a third through hole, the first screw rod is passed through the third through hole, and the filter plate is sandwiched between the first flat plate and the nut.

[0025] In an exemplary embodiment, a plurality of first positioning holes are provided on the first plate, and a plurality of second positioning holes are provided on the second plate;

[0026] The plurality of first positioning holes are respectively coaxially arranged with the plurality of second positioning holes.

[0027] In an exemplary embodiment, both the first flat plate and the second flat plate are PCB circuit boards.

[0028] In the technical solution of the present application, the nut fixes the first bolt on the first plate, the fastener fixes the first bolt on the second plate, and the first bolt fixes the first plate and the second plate relatively. Since the first plate surface of the first plate abuts against the first head of the first screw, and the third plate surface of the second plate abuts against the end of the first screw facing away from the first head, the distance between the first plate surface of the first plate and the third plate surface of the second plate is determined by the distance between the first head and the end of the first screw facing away from the first head, and the first scintillator is arranged on the first plate surface, and the second scintillator is arranged on the third plate surface, thus, the distance between the first scintillator and the second scintillator can be controlled by the distance between the first head and the end of the first screw facing away from the first head, eliminating the influence of the thickness tolerance of the first plate on the distance between the first scintillator and the second scintillator, so that the positioning accuracy of the first scintillator and the second scintillator is higher, and the pixel alignment of the first detection module and the second detection module can be better achieved, and the imaging performance is improved. At the same time, this ray detector has a simple structure and is easy to install. The first detection module and the second detection module are stably and reliably connected, which can significantly improve the product competitiveness of the ray detector.

[0029] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0031] Figure 1 This is a disassembly diagram of a radiation detector in an embodiment of the utility model;

[0032] Figure 2 It is a top view schematic diagram of a radiation detector in an embodiment of the utility model;

[0033] Figure 3 for Figure 2 Schematic cross-sectional view at AA in the middle;

[0034] Figure 4 for Figure 3 An enlarged schematic diagram of point B;

[0035] Figure 5 It is a three-dimensional schematic diagram of a first bolt in an embodiment of the utility model;

[0036] Figure 6It is a full cross-sectional schematic diagram of the first bolt in the embodiment of the utility model. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the embodiments of the utility model will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", "'mouth'-shaped structure" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the 'present' utility model and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] like Figures 1 to 3 As shown, Figures 1 to 3 The structure of a radiation detector 100 in this embodiment is shown. The radiation detector 100 includes a first detection module 1, a second detection module 2 and a connection component 3. The first detection module 1 is used to detect low-energy rays, such as low-energy X-rays. The second detection module 2 is used to detect high-energy rays, such as high-energy X-rays. The connection component 3 is used to connect the first detection module 1 and the second detection module 2 together.

[0041] like Figure 3As shown, the first detection module 1 includes a first flat plate 11 and a first scintillator 12. The first flat plate 11 may be a PCB circuit board. A first plate surface 113 and a second plate surface 114 are provided on the first flat plate 11. The first plate surface 113 and the second plate surface 114 are both planes, and the first plate surface 113 is parallel to the second plate surface 114. The first scintillator 12 is provided on the first plate surface 113 of the first flat plate 11. A first through hole 111 is also provided on the first flat plate 11. The first through hole 111 vertically penetrates the first flat plate 11. The first through hole 111 may be a circular hole. The first scintillator 12 may be welded on the first flat plate 11. The first scintillator 12 may be constructed as a sheet-like structure, and the first scintillator 12 covers the first plate surface 113. The first scintillator 12 is parallel to the first plate surface 113 of the first flat plate 11.

[0042] The second detection module 2 includes a second flat plate 21 and a second scintillator 22. The second flat plate 21 may be a PCB circuit board. A third plate surface 123 and a fourth plate surface 124 are arranged on the second flat plate 21. The third plate surface 123 and the fourth plate surface 124 are both planes, and the third plate surface 123 is parallel to the fourth plate surface 124. The third plate surface 123 of the second flat plate 21 and the second plate surface 114 of the first flat plate 11 are arranged opposite to each other, and the third plate surface 123 of the second flat plate 21 is parallel to the first plate surface 113 of the first flat plate 11. The second scintillator 22 is arranged on the third plate surface 123 of the second flat plate 21. The second scintillator 22 may be welded on the second flat plate 21. The second scintillator 22 may be constructed as a sheet structure, and the second scintillator 22 covers the third plate surface 123. The second scintillator 22 is parallel to the third plate surface 123 of the second flat plate 21.

[0043] like Figure 4 , 5 As shown, the connecting assembly 3 includes a first bolt 31, a nut 32 and a fastener 33. The first bolt 31 includes a first screw rod 312 and a first head 311. The first head 311 is arranged at one end of the first screw rod 312. The first head 311 and the first screw rod 312 can be an integrally formed structure. The diameter of the first head 311 is greater than the outer diameter of the first screw rod 312. The first head 311 is provided with a tool tightening groove, which can be a straight line, a cross, an inner hexagon, a plum blossom, a pentagon, etc. The outer peripheral wall of the first screw rod 312 is provided with a first external thread 3121, and the first external thread 3121 can be covered with the outer peripheral wall of the first screw rod 312, or can be arranged at one end of the first screw rod 312 close to the first head 311. The first screw rod 312 passes through the first through hole 111 of the first plate 11 . The end of the first screw rod 312 facing away from the first head 311 abuts against the third plate surface 123 . The first head 311 abuts against the first plate surface 113 of the first plate 11 .

[0044] The nut 32 is disposed on the side of the first plate 11 facing away from the first head 311. The nut 32 is sleeved on the first screw rod 312, and the internal thread of the nut 32 cooperates with the first external thread 3121 on the first screw rod 312 so that the nut 32 and the first screw rod 312 are screwed together. The first plate 11 is clamped between the first head 311 and the nut 32. After the nut 32 is tightened, the nut 32 and the first head 311 clamp the first plate 11 so that the first bolt 31 is fixed on the first plate 11.

[0045] The fastener 33 fixes the first screw rod 312 to the first plate 11 .

[0046] In this way, the nut 32 fixes the first bolt 31 on the first plate 11 , the fastener 33 fixes the first bolt 31 on the second plate 21 , and the first bolt 31 fixes the first plate 11 and the second plate 21 relatively. Since the first plate surface 113 of the first plate 11 abuts against the first head 311 of the first screw 312, and the third plate surface 123 of the second plate 21 abuts against the end of the first screw 312 facing away from the first head 311, the distance between the first plate surface 113 of the first plate 11 and the third plate surface 123 of the second plate 21 is determined by the distance between the first head 311 and the end of the first screw 312 facing away from the first head 311, and the first scintillator 12 is arranged on the first plate surface 113, and the second scintillator 22 is arranged on the third plate surface 123, thus, the distance between the first scintillator 12 and the second scintillator 22 can be controlled by the distance between the first head 311 and the end of the first screw 312 facing away from the first head 311, thereby eliminating the influence of the thickness tolerance of the first plate 11 on the distance between the first scintillator 12 and the second scintillator 22, so that the positioning accuracy of the first scintillator 12 and the second scintillator 22 is higher, and the pixel alignment of the first detection module 1 and the second detection module 2 can be better achieved, thereby improving the imaging performance. At the same time, the radiation detector 100 has a simple structure and is easy to install. The first detection module 1 and the second detection module 2 are stably and reliably connected, which can significantly improve the product competitiveness of the radiation detector 100.

[0047] In an illustrative embodiment, Figure 5 , 6 As shown, a screw hole 3122 is provided on the first screw rod 312, and the screw hole 3122 extends from the end of the first screw rod 312 facing away from the first head 311 toward the direction close to the first head 311. The screw hole 3122 may be provided only at the end of the first screw rod 312 facing away from the first head 311, or the screw hole 3122 may penetrate the first screw rod 312. A first internal thread 3123 is provided on the inner wall of the screw hole 3122. The screw hole 3122 is coaxially arranged with the first screw rod 312.

[0048] The second plate 21 is provided with a second through hole 211. The second through hole 211 vertically penetrates the second plate 21. The second through hole 211 may be a circular hole. The inner liner of the second through hole 211 is smaller than the outer diameter of the first screw rod 312 of the first bolt 31. The second through hole 211 of the second plate 21 is coaxially arranged with the first through hole 111 of the first plate 11. The end surface of the end of the first screw rod 312 facing away from the first head 311 abuts against the position where the second through hole 211 is provided on the second plate 21. The first screw hole 3122 on the first bolt 31 may be coaxial with the second through hole 211 on the second plate 21.

[0049] The fastener 33 is configured as a bolt. The fastener 33 includes a second screw rod 332 and a second head 331. The second screw rod 332 is provided with a second external thread 3321. The second screw rod 332 is inserted into the second through hole 211 of the second plate 21, and one end of the second screw rod 332 extends into the screw hole 3122 of the first screw rod 312, and the second screw rod 332 is screwed into the screw hole 3122 of the first screw rod 312. The second plate 21 is sandwiched between the second head 331 and the first screw rod 312, and is relatively fixed to the first bolt 31.

[0050] The fastener 33 of this structure is used to connect the second plate 21 and the first bolt 31 together, so that the first bolt 31 and the second plate 21 can be easily installed and removed.

[0051] In an illustrative embodiment, Figure 4 As shown, the connection assembly 3 further includes a gasket 34. The gasket 34 can be constructed as a circular sheet structure. The gasket 34 is sleeved on the second screw rod 332. The gasket 34 is sandwiched between the second head 331 of the second bolt and the second plate 21.

[0052] In this way, the gasket 34 can increase the contact area between the second head 331 and the second flat plate 21, prevent the second flat plate 21 from being squeezed and deformed, and prevent the second bolt from loosening.

[0053] In an exemplary embodiment, the end surface where the first head 311 of the first bolt 31 butts against the first plate 11 is a plane, which is perpendicular to the axis of the first screw rod 312 of the first bolt 31. The end surface where the first screw rod 312 of the first bolt 31 butts against the second plate 21 is a plane, which is perpendicular to the plane of the axis of the first screw rod 312.

[0054] In this way, the end face where the first head 311 abuts against the first flat plate 11 and the end face where the first screw 312 abuts against the second flat plate 21 are parallel to each other and are both perpendicular to the axis of the first screw 312. When the first plate surface 113 of the first flat plate 11 and the third plate surface 123 of the second flat plate 21 respectively abut against these two end faces, the positioning accuracy of the first scintillator 12 and the second scintillator 22 is higher.

[0055] In an exemplary embodiment, the first scintillator 12 and the second scintillator 22 are aligned in a direction perpendicular to the first flat plate 11 .

[0056] When a beam of rays enters the first scintillator 12 from the side of the first scintillator 12 facing away from the second scintillator 22, low-energy rays can be detected by the first scintillator 12, and high-energy rays can pass through the first scintillator 12 and the first flat plate 11 and enter the second scintillator 22, and be detected by the second scintillator 22. When the first scintillator 12 and the second scintillator 22 are aligned in a direction perpendicular to the first flat plate 11, accurate alignment between high-energy and low-energy pixels can be achieved.

[0057] In an illustrative embodiment, Figure 2 , 3 As shown, a plurality of connection components 3 are provided. The plurality of connection components 3 are respectively provided on two opposite sides of the first scintillator 12 , and the plurality of connection components 3 are also respectively provided on two opposite sides of the second scintillator 22 .

[0058] Multiple connecting components 3 connect the first plate 11 and the second plate 21 together from the opposite sides of the first scintillator 12 and the opposite sides of the second scintillator 22, respectively, which can effectively prevent the first plate 11 or the second plate 21 from warping, making the spacing between the first scintillator 12 and the second scintillator 22 uneven, further improving the positioning accuracy between the first scintillator 12 and the second scintillator 22.

[0059] In an illustrative embodiment, Figure 1 As shown, the radiation detector 100 further includes a filter 4. The filter 4 can be constructed as a flat plate structure. The filter 4 can be a filter copper plate. The filter 4 is located between the first scintillator 12 and the second scintillator 22, and the filter 4 is used to filter out low-energy rays. High-energy rays can pass through the filter 4. The high-energy rays that can pass through the filter 4 can be screened out by controlling the thickness of the filter 4.

[0060] The filter plate 4 is provided with a third through hole 41, which may be a round hole. The first screw rod 312 of the first bolt 31 is passed through the third through hole 41. The filter plate 4 is sandwiched between the first plate 11 and the nut 32.

[0061] The filter 4 can filter out low-energy rays to prevent the low-energy rays from irradiating the second scintillator 22 and affecting the detection result of high-energy rays.

[0062] In an illustrative embodiment, Figure 1As shown, a plurality of first positioning holes 112 are provided on the first plate 11. The first positioning holes 112 may be circular through holes. A plurality of second positioning holes 212 are provided on the second plate 21, and the second positioning holes 212 may be circular through holes. The aperture of the first positioning holes 112 is the same as the aperture of the second positioning holes 212. The number of the first positioning holes 112 is the same as the number of the second positioning holes 212. The plurality of first positioning holes 112 are respectively coaxially arranged with the plurality of second positioning holes 212.

[0063] In this way, when assembling the radiation detector 100, a tooling provided with a plurality of mutually parallel positioning pins can be used to position the first plate 11 and the second plate 21. The plurality of positioning pins on the tooling are respectively passed through the plurality of first positioning holes 112 of the first plate 11 and the plurality of second positioning holes 212 of the second plate 21, so that high-precision alignment of the first scintillator 12 and the second scintillator 22 can be achieved, thereby achieving precise alignment between high-energy and low-energy pixels.

[0064] Although the implementation methods disclosed in the utility model are as above, the above contents are only implementation methods adopted to facilitate the understanding of the utility model, and are not used to limit the utility model. Any technician in the field to which the utility model belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the utility model, but the scope of patent protection of the utility model shall still be defined by the attached claims.

Claims

1. A radiation detector, characterized in that: include: The first detection module comprises A first flat plate is provided with a first through hole, a first plate surface and a second plate surface opposite to the first plate surface; and, A first scintillator, disposed on the first plate surface; The second detection module includes The second flat plate is provided with a third plate surface which is parallel to the first plate surface and is arranged opposite to the second plate surface; and, A second scintillator is arranged on the third plate surface; Connectivity components, including A first bolt includes a first screw rod passing through the first through hole and a first head connected to one end of the first screw rod, the first head rod abuts against the first plate surface, and an end of the first screw rod facing away from the first head rod abuts against the third plate surface; A nut, mounted on the first screw rod, wherein the first flat plate is sandwiched between the first head and the nut; as well as, A fastener is used to fix the first screw rod to the first plate.

2. The radiation detector according to claim 1, characterized in that: The second plate is provided with a second through hole coaxial with the first through hole, and the inner diameter of the second through hole is smaller than the outer diameter of the first screw; The first screw rod is provided with a screw hole, and the screw hole extends from an end of the first screw rod facing away from the first head portion toward the first head portion; The fastener comprises a second screw rod passing through the second through hole and screwed into the screw hole, and a second head connected to one end of the second screw rod; Wherein, the second flat plate is clamped between the second head and the first screw.

3. The radiation detector according to claim 2, characterized in that: The connection assembly also includes a gasket, which is sleeved on the second screw rod and clamped between the second head and the second flat plate.

4. The radiation detector according to claim 1, characterized in that: The end surface of the first head abutting against the first flat plate and the end surface of the first screw abutting against the second flat plate are both planes perpendicular to the axis of the first screw.

5. The radiation detector according to any one of claims 1 to 4, characterized in that: The first scintillator and the second scintillator are aligned in a direction perpendicular to the first flat plate.

6. The radiation detector according to claim 5, characterized in that: There are multiple connecting components, and the multiple connecting components are respectively arranged on two opposite sides of the first scintillator and two opposite sides of the second scintillator.

7. The radiation detector according to claim 5, characterized in that: The radiation detector further comprises a filter, wherein the filter is located between the first scintillator and the second scintillator; The filter plate is provided with a third through hole, the first screw rod is passed through the third through hole, and the filter plate is sandwiched between the first flat plate and the nut.

8. The radiation detector according to any one of claims 1 to 4, characterized in that: The first plate is provided with a plurality of first positioning holes, and the second plate is provided with a plurality of second positioning holes; The plurality of first positioning holes are respectively coaxially arranged with the plurality of second positioning holes.

9. The radiation detector according to any one of claims 1 to 4, characterized in that: The first flat plate and the second flat plate are both PCB circuit boards.

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