Centering adjustment type linear array detector collimator

Abstract

The utility model provides a centering adjustment type linear array detector collimator, comprising a substrate which is arranged at the front end of a linear array detector and is provided with a through hole in a penetrating manner; the linkage component is of a parallel four-connecting-rod structure and is arranged on the base plate through a positioning piece; the number of the lead plates is two, and the two lead plates are arranged on the side, close to the linear array detector, of the linkage component and located in the via hole; the adjusting component is arranged at one end of the base plate, connected with the linkage component and used for adjusting the size of a gap formed between the two lead plates; and the limiting component is arranged on one side, far away from the linear array detector, of the substrate and is used for limiting the motion trail of the linkage component. The slit height adjusting device can be tightly attached to the front end of the linear array detector, continuous and accurate adjustment of the slit height within a certain range can be achieved, the structure is simple and compact, and adjustment of imaging geometric parameters is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial CT equipment, in particular to a centering adjustment type linear array detector collimator. Background Art

[0002] Most of the existing X-ray collimators are front collimators, that is, the collimators are installed between the radiation source and the workpiece to be measured. The front collimators reduce the useless radiation entering the working area from the source and reduce the total amount of scattered radiation. However, the front collimator is installed between the radiation source and the workpiece to be measured. After the radiation is collimated by the front collimator, it will also be scattered when it penetrates the workpiece to reach the linear array detector. Summary of the invention

[0003] In view of this, the utility model aims to provide a centering adjustable linear array detector collimator to solve the problem of radiation scattering caused by the front collimator being installed between the radiation source and the workpiece to be measured.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] The utility model provides a centering adjustable linear array detector collimator, comprising:

[0006] A substrate, the substrate is mounted on the front end of the linear array detector, and a via hole is formed through the substrate;

[0007] A linkage member, which is a parallel four-link structure and is arranged on the substrate through a positioning member;

[0008] Lead plates, the number of which is two, the two lead plates being arranged on a side of the linkage member close to the linear array detector and located in the through hole;

[0009] An adjusting member, which is arranged at one end of the base plate and connected to the linkage member, and is used to adjust the size of the gap formed between the two lead plates;

[0010] A limiting component is arranged on a side of the substrate away from the linear array detector, and is used to limit the movement trajectory of the linkage component.

[0011] Furthermore, a plurality of mounting holes are reserved at the edges of the substrate, and the substrate is mounted on the line array detector by fastening screws passing through the mounting holes.

[0012] Further, the linkage member includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod;

[0013] Wherein, the first connecting rod is arranged in parallel with the second connecting rod, and the third connecting rod is arranged in parallel with the fourth connecting rod;

[0014] The third connecting rod is hinged to one end of the first connecting rod and the second connecting rod, and the fourth connecting rod is hinged to the other end of the first connecting rod and the second connecting rod;

[0015] The third link and the fourth link are rotatable around the positioning member.

[0016] Further, the third connecting rod is connected to the first connecting rod and the second connecting rod respectively through two sets of guide shafts and shaft rings;

[0017] The fourth connecting rod is connected to the first connecting rod and the second connecting rod respectively through two groups of guide shafts and shaft rings.

[0018] Furthermore, the two lead plates are correspondingly arranged on the first connecting rod and the second connecting rod and are located in the through hole.

[0019] Furthermore, two symmetrically arranged fixing holes are reserved on the substrate, and the two fixing holes are located on both sides of the via hole;

[0020] The number of the positioning members is two, and the two positioning members are installed on the base plate by fastening bolts passing through the fixing holes;

[0021] The positioning member includes a positioning support and a positioning pin shaft arranged on the positioning support. Positioning holes are penetrated through the third connecting rod and the fourth connecting rod, and the positioning pin shaft is correspondingly arranged in the positioning holes.

[0022] Furthermore, an avoidance groove for the positioning pin to move is reserved on the first connecting rod and the second connecting rod.

[0023] Furthermore, an adjustment hole is provided at one end of the second connecting rod;

[0024] The adjusting component includes a fixing block and an adjusting screw. The fixing block is arranged at one end of the base plate. A connecting hole is opened on the fixing block. The nut end of the adjusting screw is arranged in the connection. The threaded end of the adjusting screw cooperates with the adjusting hole.

[0025] Furthermore, the limiting component includes a plurality of limiting blocks, which are arranged at intervals on the substrate and are respectively and correspondingly arranged on both sides of the via hole;

[0026] A plurality of the limiting blocks cooperate with each other to form a limiting space that can limit the movement trajectories of the first connecting rod and the second connecting rod.

[0027] Furthermore, a plurality of weight-reducing holes are provided on the base plate.

[0028] Compared with the prior art, the centering adjustable linear array detector collimator described in the utility model has the following beneficial effects:

[0029] The utility model discloses a centering adjustable linear array detector collimator which cooperates with a substrate, a lead plate and various components. The collimator can be installed close to the front end of the linear array detector, and can realize continuous and precise adjustment of the slit height within a certain range. The collimator has a simple and compact structure and does not affect the adjustment of imaging geometric parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the first angle structure of a centering adjustable linear array detector collimator according to an embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the second angle structure of a centering adjustable linear array detector collimator according to an embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the first angle structure of the linkage component according to an embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the second angle structure of the linkage component according to the embodiment of the utility model;

[0035] Figure 5 This is a schematic structural diagram of the substrate, positioning member and adjusting member according to an embodiment of the utility model;

[0036] Figure 6 This is a schematic diagram of a first state of a centering adjustable linear array detector collimator according to an embodiment of the utility model;

[0037] Figure 7 This is a schematic diagram of the second state of a centering adjustable linear array detector collimator according to an embodiment of the utility model.

[0038] Description of reference numerals:

[0039] 1-base plate; 11-through hole; 12-weight reduction hole; 2-linkage component; 21-first connecting rod; 22-second connecting rod; 23-third connecting rod; 24-fourth connecting rod; 25-guide shaft; 26-shaft ring; 27-avoidance groove; 3-lead plate; 4-positioning piece; 41-positioning support; 42-positioning pin; 5-adjusting component; 51-fixing block; 52-adjusting screw; 6-limiting block. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] See also Figure 1 and Figure 2 As shown, this embodiment provides a centering adjustable linear array detector collimator, comprising:

[0043] A substrate 1, the substrate 1 is mounted on the front end of a line array detector (the line array detector is not shown in the drawings), and a via 11 is formed through the substrate 1;

[0044] The linkage member 2 is a parallel four-link structure and is arranged on the base plate 1 through a positioning member 4;

[0045] Lead plates 3, the number of the lead plates 3 is two, the two lead plates 3 are arranged on a side of the linkage member 2 close to the linear array detector and are located in the through hole 11;

[0046] An adjusting member 5, which is disposed at one end of the base plate 1 and connected to the linkage member 2, and is used to adjust the size of the gap formed between the two lead plates 3;

[0047] The limiting component is arranged on a side of the substrate 1 away from the linear array detector, and is used to limit the movement trajectory of the linkage component 2.

[0048] Specifically, in this embodiment, by setting a rear collimator, that is, installing the collimator close to the front end of the linear array detector, the collimation size can be controlled more accurately. At the same time, the path of the X-ray beam can be effectively controlled and the slice thickness can be adjusted, thereby reducing ray scattering and improving system resolution.

[0049] The centering adjustable linear array detector collimator described in this embodiment cooperates with the substrate 1, the lead plate 3 and various components. The collimator can be installed close to the front end of the linear array detector, and can achieve continuous and precise adjustment of the slit height within a certain range. It has a simple and compact structure and does not affect the adjustment of imaging geometric parameters.

[0050] In some embodiments, a plurality of mounting holes are reserved at the edges of the substrate 1, and the substrate 1 is mounted on the line array detector by fastening screws through the mounting holes;

[0051] A plurality of weight-reducing holes 12 are also provided on the base plate 1 .

[0052] Specifically, in this embodiment, the substrate 1 is provided with mounting holes at the edge position, and the substrate 1 is installed at the front end of the linear array detector by fastening screws. The substrate 1 is connected to the linear array detector through a detachable structure. At the same time, a plurality of weight-reducing holes 12 are opened on the substrate 1 to reduce the weight of the entire collimator and make the structure lighter.

[0053] In some embodiments, Figure 3 and Figure 4 As shown, the linkage member 2 includes a first link 21, a second link 22, a third link 23 and a fourth link 24;

[0054] The first connecting rod 21 is arranged in parallel with the second connecting rod 22, and the third connecting rod 23 is arranged in parallel with the fourth connecting rod 24;

[0055] The third connecting rod 23 is hinged to one end of the first connecting rod 21 and the second connecting rod 22, and the fourth connecting rod 24 is hinged to the other end of the first connecting rod 21 and the second connecting rod 22;

[0056] The two lead plates 3 are correspondingly arranged on the first connecting rod 21 and the second connecting rod 22 and are located in the through hole 11. The third connecting rod 23 and the fourth connecting rod 24 can rotate around the positioning member 4.

[0057] The third connecting rod 23 is connected to the first connecting rod 21 and the second connecting rod 22 respectively through two sets of guide shafts 25 and shaft rings 26;

[0058] The fourth connecting rod 24 is connected to the first connecting rod 21 and the second connecting rod 22 through two sets of guide shafts 25 and shaft collars 26 respectively.

[0059] Specifically, in this embodiment, the linkage member 2 is configured as a connected parallel four-bar structure, and three positioning holes are reserved on the third link 23 and the fourth link 24, which are two symmetrically arranged positioning holes for connecting the first link 21 and the second link 22 in the parallel four-bar structure. The two ends of the first link 21 and the second link 22 are arranged on the third link 23 and the fourth link 24 through a guide shaft 25 and a shaft ring 26.

[0060] The two lead plates 3 are respectively fixed on the first connecting rod 21 and the second connecting rod 22 by fastening screws to absorb scattered rays.

[0061] In some embodiments, Figure 5As shown, two symmetrically arranged fixing holes are reserved on the substrate 1, and the two fixing holes are located on both sides of the via hole 11;

[0062] There are two positioning members 4, and the two positioning members 4 are installed on the base plate 1 by fastening bolts passing through the fixing holes;

[0063] The positioning member 4 includes a positioning support 41 and a positioning pin 42 disposed on the positioning support 41. Positioning holes are formed through the third connecting rod 23 and the fourth connecting rod 24, and the positioning pin 42 is correspondingly disposed in the positioning holes.

[0064] The first connecting rod 21 and the second connecting rod 22 are provided with an escape groove 27 for the positioning pin 42 to move.

[0065] Specifically, in this embodiment, the positioning holes located at the center positions of the third connecting rod 23 and the fourth connecting rod 24 are used to connect the positioning pin 42. The third connecting rod 23, the fourth connecting rod 24 are connected to the first connecting rod 21 and the second connecting rod 22 through four sets of guide shafts 25 and shaft rings 26. The third connecting rod 23 and the fourth connecting rod 24 can be rotated around the positioning pin 42 through the positioning pin 42.

[0066] In some embodiments, an adjustment hole is provided at one end of the second connecting rod 22;

[0067] like Figure 5 As shown, the adjusting member 5 includes a fixing block 51 and an adjusting screw 52. The fixing block 51 is arranged at one end of the substrate 1. A connecting hole is opened on the fixing block 51. The nut end of the adjusting screw 52 is arranged in the connecting hole. The threaded end of the adjusting screw 52 cooperates with the adjusting hole.

[0068] Specifically, in this embodiment, an adjustment hole (i.e., a threaded hole) is reserved at the right end of the second connecting rod 22, which cooperates with the threaded end of the fine-thread adjustment screw 52. The nut end of the adjustment screw 52 is connected to the fixed block 51. The connecting hole at the fixed block 51 is a U-shaped long hole, which only limits the movement of the adjustment screw 52 along its axial direction, but does not limit the rotation around its axial direction and the movement perpendicular to its axial direction. The fixed block 51 is fixedly installed on the base plate 1.

[0069] In some embodiments, Figure 1 As shown, the limiting member includes a plurality of limiting blocks 6, which are arranged at intervals on the substrate 1 and are respectively disposed on both sides of the via hole 11;

[0070] A plurality of limiting blocks 6 cooperate with each other to form a limiting space that can limit the movement trajectory of the first connecting rod 21 and the second connecting rod 22 .

[0071] Specifically, in this embodiment, a plurality of limit blocks 6 are arranged on both sides of the through hole 11 of the substrate 1 . The limit blocks 6 are L-shaped structures and are installed on the substrate 1 to limit the movement trajectories of the first connecting rod 21 and the second connecting rod 22 .

[0072] The specific adjustment methods are as follows:

[0073] When the adjusting screw 52 is rotated clockwise, the first connecting rod 21 and the second connecting rod 22 will move along Figure 6 The collimating gap is enlarged until it touches the L-shaped limit block 6.

[0074] When the adjusting screw 52 is rotated counterclockwise, the first connecting rod 21 and the second connecting rod 22 will move along Figure 7 The first connecting rod 21 and the second connecting rod 22 move parallel to each other in the direction shown in the figure, thereby reducing the collimation gap until the first connecting rod 21 and the second connecting rod 22 touch each other, at which time the gap is zero.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A centering adjustable linear array detector collimator, characterized in that: include: A substrate (1), the substrate (1) being mounted at the front end of the linear array detector, and a via (11) penetrating the substrate (1); A linkage component (2), the linkage component (2) being a parallel four-link structure and being arranged on the base plate (1) via a positioning member (4); Lead plates (3), the number of the lead plates (3) being two, the two lead plates (3) being arranged on a side of the linkage component (2) close to the linear array detector and located in the through hole (11); an adjusting member (5), the adjusting member (5) being arranged at one end of the base plate (1) and connected to the linkage member (2) for adjusting the size of a gap formed between the two lead plates (3); A limiting component is arranged on a side of the substrate (1) away from the linear array detector and is used to limit the movement trajectory of the linkage component (2).

2. The centering adjustable linear array detector collimator according to claim 1, characterized in that: A plurality of mounting holes are reserved at the edges of the substrate (1), and the substrate (1) is mounted on the linear array detector by fastening screws passing through the mounting holes.

3. The centering adjustable linear array detector collimator according to claim 2, characterized in that: The linkage component (2) comprises a first connecting rod (21), a second connecting rod (22), a third connecting rod (23) and a fourth connecting rod (24); Wherein, the first connecting rod (21) and the second connecting rod (22) are arranged in parallel, and the third connecting rod (23) and the fourth connecting rod (24) are arranged in parallel; The third connecting rod (23) is hinged to one end of the first connecting rod (21) and the second connecting rod (22), and the fourth connecting rod (24) is hinged to the other end of the first connecting rod (21) and the second connecting rod (22); The third connecting rod (23) and the fourth connecting rod (24) can rotate around the positioning member (4).

4. The centering adjustable linear array detector collimator according to claim 3, characterized in that: The third connecting rod (23) is respectively connected to the first connecting rod (21) and the second connecting rod (22) through two sets of guide shafts (25) and shaft rings (26); The fourth connecting rod (24) is respectively connected to the first connecting rod (21) and the second connecting rod (22) via two sets of guide shafts (25) and shaft rings (26).

5. The centering adjustable linear array detector collimator according to claim 4, characterized in that: The two lead plates (3) are correspondingly arranged on the first connecting rod (21) and the second connecting rod (22), and are located in the through hole (11).

6. The centering adjustable linear array detector collimator according to claim 3, characterized in that: The substrate (1) is also provided with two symmetrically arranged fixing holes, the two fixing holes being located on both sides of the via hole (11); The number of the positioning members (4) is two, and the two positioning members (4) are installed on the base plate (1) by fastening bolts passing through the fixing holes; The positioning member (4) comprises a positioning support (41) and a positioning pin (42) arranged on the positioning support (41); positioning holes are provided through the third connecting rod (23) and the fourth connecting rod (24); and the positioning pin (42) is correspondingly arranged in the positioning holes.

7. The centering adjustable linear array detector collimator according to claim 6, characterized in that: The first connecting rod (21) and the second connecting rod (22) are provided with avoidance grooves (27) for the positioning pin shaft (42) to move.

8. The centering adjustable linear array detector collimator according to claim 3, characterized in that: An adjustment hole is formed at one end of the second connecting rod (22); The adjusting member (5) comprises a fixing block (51) and an adjusting screw (52); the fixing block (51) is arranged at one end of the base plate (1); a connecting hole is provided on the fixing block (51); a nut end of the adjusting screw (52) is arranged in the connecting hole; and a threaded end of the adjusting screw (52) matches the adjusting hole.

9. The centering adjustable linear array detector collimator according to claim 3, characterized in that: The limiting component comprises a plurality of limiting blocks (6), wherein the plurality of limiting blocks (6) are arranged at intervals on the substrate (1) and are respectively arranged on two sides of the via hole (11); A plurality of the limit blocks (6) cooperate with each other to form a limit space capable of limiting the movement tracks of the first connecting rod (21) and the second connecting rod (22).

10. The centering adjustable linear array detector collimator according to claim 2, characterized in that: The base plate (1) is also provided with a plurality of weight-reducing holes (12).

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