Front collimator and scanning imaging equipment

Abstract

The invention relates to a front collimator and scanning imaging equipment. The front collimator comprises a shading assembly which comprises a first shading piece and a second shading piece which is arranged side by side with the first shading piece at an interval, and a collimation slit is formed between the first shading piece and the second shading piece; the driving assembly comprises a first transmission part connected with the first shading piece, a second transmission part connected with the second shading piece and a driving part connected with the first transmission part and the second transmission part; the driving part synchronously drives the first shading part and the second shading part through the first transmission part and the second transmission part respectively to perform linear motion in opposite directions so as to enable the first shading part and the second shading part to be close to each other or away from each other, so that the width of the collimation slit is adjusted. The front collimator provided by the embodiment of the invention has a structure capable of adjusting the width of the collimation slit, so that the width of the collimation slit can be adjusted according to actual application conditions, and the scanning thickness can be changed. The front collimator is high in universality and adaptability, the overall operation is simple and convenient, the working efficiency is improved, and the use cost is reduced.

Description

[0001] Related applications This application is a divisional application of the invention patent application filed on October 25, 2017, with application number 201711008493.3 and title "Front Collimator and Scanning Imaging Device". Technical Field

[0002] This invention relates to the field of radiation detection technology, and in particular to a front collimator and a scanning imaging device. Background Technology

[0003] Scanning imaging equipment has the advantage of being able to probe the interior of an object without contact, thus avoiding physical damage to the object being inspected. Therefore, it is widely used in industrial production and daily life for object scanning. Scanning imaging equipment typically includes a detection module. The detection module includes a front collimator, which determines the scan slice thickness.

[0004] Through long-term observation, research, and analysis, the applicant discovered that the slit opening on the precollimator in existing technologies is not adjustable. Because precollimators with non-adjustable slit sizes lack versatility, different detection requirements can only be met by replacing them with precollimators of different slit widths, resulting in a cumbersome operation and increased usage costs. Summary of the Invention

[0005] This invention provides a front collimator and a scanning imaging device. The front collimator of this embodiment has an adjustable collimation slit width, allowing the width of the collimation slit to be adjusted according to actual application conditions, thereby changing the scanning thickness. Thus, the front collimator of this embodiment is versatile, adaptable, and easy to operate, improving work efficiency and reducing operating costs.

[0006] On one hand, according to an embodiment of the present invention, a front collimator is provided for a scanning imaging device, comprising: a light-shielding assembly including a first light-shielding member and a second light-shielding member disposed side-by-side and spaced apart from the first light-shielding member, wherein a collimation slit is formed between the first light-shielding member and the second light-shielding member; and a driving assembly including a first transmission part connected to the first light-shielding member, a second transmission part connected to the second light-shielding member, and a driving part connected to the first transmission part and the second transmission part; the driving part synchronously drives the first light-shielding member and the second light-shielding member to perform linear movements in opposite directions to bring them closer or further apart, thereby adjusting the width of the collimation slit.

[0007] According to one aspect of the present invention, the collimation slit width adjustment range is 0 mm to 15 mm.

[0008] According to one aspect of the present invention, both the first light-shielding member and the second light-shielding member are plate-shaped structures.

[0009] According to one aspect of the present invention, the first transmission part and the second transmission part rotate to drive the first light-shielding member and the second light-shielding member to move closer to or further away from each other.

[0010] According to one aspect of the present invention, the drive assembly includes a drive shaft, wherein a first drive portion and a second drive portion are threaded sections coaxially disposed on the drive shaft and rotate in opposite directions.

[0011] According to one aspect of the present invention, a first light-shielding member includes a first connecting portion, a second light-shielding member includes a second connecting portion, a first transmission portion is threadedly connected to the first connecting portion, and a second transmission portion is threadedly connected to the second connecting portion.

[0012] According to one aspect of the present invention, the first light-shielding member further includes a first bushing disposed on the first connecting portion, and the second light-shielding member further includes a second bushing disposed on the second connecting portion, wherein the first bushing and the second bushing are respectively threadedly connected to the first transmission portion and the second transmission portion.

[0013] According to one aspect of the present invention, the first connecting portion and the second connecting portion are L-shaped plates, and the first bushing and the second bushing are respectively disposed on the L-shaped plates.

[0014] According to one aspect of the present invention, the drive assembly further includes a first limiting member and a second limiting member connected to the drive shaft, and the first transmission part and the second transmission part are disposed between the first limiting member and the second limiting member.

[0015] According to one aspect of the present invention, both the first limiting member and the second limiting member are shaft retaining rings, and the first limiting member and the second limiting member are spaced apart along the axial direction of the transmission shaft.

[0016] According to one aspect of the present invention, the front collimator further includes a fixing block disposed between the first transmission part and the second transmission part, and the transmission shaft is rotatably connected to the fixing block.

[0017] According to one aspect of the present invention, the fixing block includes a through hole perpendicular to the collimation slit, and the drive shaft is clearance-fitted to the through hole to achieve a rotatable connection with each other.

[0018] According to one aspect of the present invention, the first light-shielding member includes a first support and a first tungsten iron nickel plate disposed on the first support, the second light-shielding member includes a second support and a second tungsten iron nickel plate disposed on the second support, a first transmission part is connected to the first support, a second transmission part is connected to the second support, and a collimation slit is formed between the first tungsten iron nickel plate and the second tungsten iron nickel plate.

[0019] According to one aspect of the present invention, a first support is provided with a first groove, a first tungsten iron nickel plate seat is connected to the first groove, a second support is provided with a second groove, and a second tungsten iron nickel plate seat is connected to the second groove.

[0020] According to one aspect of the present invention, there are two driving components, which are respectively disposed on opposite sides of the light-shielding component along the extension direction of the collimation slit.

[0021] The front collimator provided in this embodiment of the invention includes a movable first light-shielding member and a second light-shielding member. The width of the collimation slit formed between the first and second light-shielding members is adjusted by changing their relative positions using a driving unit to meet the requirements of different scanning thicknesses. Therefore, the front collimator of this embodiment is versatile, eliminating the need for frequent replacement of front collimators with different slit widths to meet varying scanning thickness requirements. The collimation slit adjustment process of the front collimator is simple and easy to operate, improving work efficiency and reducing labor intensity and operating costs.

[0022] In another aspect, according to an embodiment of the present invention, a scanning imaging device is provided, comprising: a fixed bracket and an optomechanical assembly disposed on the fixed bracket; a front collimator as described above, the front collimator being connected to the fixed bracket and disposed on the light output path of the optomechanical assembly. Attached Figure Description

[0023] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of a front collimator according to an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the usage of the front collimator in a scanning imaging device according to an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0025] The accompanying drawings are not drawn to scale. Detailed Implementation

[0026] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.

[0027] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] To better understand this invention, the following is combined with... Figure 1 and Figure 3 The collimator of an embodiment of the present invention will be described in detail.

[0030] Figure 1 The structure of the front collimator 100 is schematically shown. (As shown) Figure 1 As shown, the front collimator 100 of this embodiment is used in a scanning imaging device and can adjust the scanning thickness. The front collimator 100 of this embodiment has a structure that allows adjustment of the collimation slit width, thereby enabling adjustment of the collimation slit width and changing the scanning thickness according to actual application conditions. Thus, the front collimator 100 of this embodiment is versatile, adaptable, and easy to operate, improving work efficiency and reducing operating costs.

[0031] The front collimator 100 of this embodiment includes a light-shielding component 1 and a driving component 2. Scanning imaging equipment typically uses an X-ray machine to generate scanning light. The front collimator 100 is positioned in the path of light propagation, and the light-shielding component 1 filters out most of the light, allowing the effective portion of the light to pass through the light-shielding component 1 for scanning.

[0032] The light-shielding assembly 1 in this embodiment includes a first light-shielding member 11 and a second light-shielding member 12. The first light-shielding member 11 and the second light-shielding member 12 are arranged side by side with a gap between them. A collimation slit 13 is formed between the first light-shielding member 11 and the second light-shielding member 12. Light generated by the optical engine can pass through the collimation slit 13 to scan the object to be scanned. The width of the collimation slit 13 can control the dose of light passing through and control the scanning thickness. The first light-shielding member 11 and the second light-shielding member 12 are independent of each other and can move relative to each other to adjust the width of the collimation slit 13.

[0033] The drive assembly 2 in this embodiment includes a first transmission section 21, a second transmission section 22, and a drive section. The first transmission section 21 is connected to the first light-shielding member 11. The second transmission section 22 is connected to the second light-shielding member 12. The drive section is connected to both the first transmission section 21 and the second transmission section 22. The drive section drives the first light-shielding member 11 and the second light-shielding member 12 to move in opposite directions in a linear motion, bringing them closer together or further apart, thereby adjusting the width of the collimation slit 13.

[0034] The front collimator 100 of this embodiment includes a movable first light-shielding member 11 and a second light-shielding member 12. The width of the collimation slit 13 formed between the first and second light-shielding members 11 and 12 is adjusted by a driving unit to change their relative positions, thus meeting the requirements of different scanning thicknesses. Therefore, the front collimator 100 of this embodiment is versatile, eliminating the need for frequent replacement of front collimators 100 with different slit widths to meet varying scanning thickness requirements. The adjustment process of the collimation slit 13 of the front collimator 100 is simple and easy to operate, improving work efficiency and reducing labor intensity and operating costs.

[0035] In this embodiment, the first transmission part 21 and the second transmission part 22 rotate to drive the first light-shielding member 11 and the second light-shielding member 12 to move closer to or further away from each other. The first transmission part 21 includes a first rotation axis. The first transmission part 21 is capable of rotating around the first rotation axis. The second transmission part 22 includes a second rotation axis. The second transmission part 22 is capable of rotating around the second rotation axis. The first transmission part 21 and the second transmission part 22 drive the first light-shielding member 11 and the second light-shielding member 12 to move linearly through their own rotational motion. On the one hand, this makes the overall structure of the front collimator 100 compact and small in size; on the other hand, it provides high transmission accuracy and improves the adjustment accuracy of the collimation slit 13 width. In one embodiment, the first transmission part 21 and the first light-shielding member 11, the second transmission part 22 and the second light-shielding member 12 are connected by a gear and rack transmission, or the first transmission part 21 and the first light-shielding member 11, the second transmission part 22 and the second light-shielding member 12 are connected by a threaded transmission. Preferably, the first transmission part 21 and the first light-shielding member 11, the second transmission part 22 and the second light-shielding member 12 are connected by a threaded transmission.

[0036] Optionally, the drive assembly 2 includes a drive shaft 23. The first drive section 21 and the second drive section 22 are coaxially arranged threaded segments on the drive shaft 23 with opposite rotation directions. The first drive section 21 and the second drive section 22 are threadedly connected to the first light-shielding member 11 and the second light-shielding member 12, respectively. The first rotation axis coincides with the second rotation axis. The first light-shielding member 11 and the second light-shielding member 12 move axially along the first rotation axis or the second rotation axis, respectively. The first drive section 21 and the first light-shielding member 11, and the second drive section 22 and the second light-shielding member 12, are connected by threaded transmission. The drive assembly can drive the drive shaft 23 to rotate, and the drive shaft 23 can simultaneously drive the first drive section 21 and the second drive section 22 to rotate. The first drive section 21 and the second drive section 22 synchronously drive the first light-shielding member 11 and the second light-shielding member 12 to perform linear motion, improving the accuracy of adjusting the width of the collimation slit 13 and increasing working efficiency. The threaded transmission method is simple and easy to operate, and has low manufacturing difficulty.

[0037] In one example, the drive shaft 23 is a screw. The first drive section 21 and the second drive section 22 are coaxial and spaced apart along the axial direction of the screw. When the first drive section 21 is a forward-rotating threaded section, the second drive section 22 is a reverse-rotating threaded section, or vice versa. When the screw is driven to rotate through one end or the middle part, the screw drives the first light-blocking member 11 and the second light-blocking member 12 to move linearly along the axial direction of the screw through the first drive section 21 and the second drive section 22, thereby adjusting the width of the collimation slit 13. This achieves stepless adjustment of the width of the collimation slit 13, improving the versatility, adaptability, and adjustment accuracy of the front collimator 100.

[0038] Optionally, the first light-shielding member 11 and the second light-shielding member 12 can be separate structures, reducing the overall manufacturing difficulty of the first light-shielding member 11 and the second light-shielding member 12. The first light-shielding member 11 and the second light-shielding member 12 respectively include a first connecting portion 111 and a second connecting portion 121. The first connecting portion 111 and the second connecting portion 121 are both independent structural components. The first transmission portion 21 and the second transmission portion 22 are respectively threadedly connected to the first connecting portion 111 and the second connecting portion 121.

[0039] Optionally, the first light-shielding member 11 further includes a first bushing 14 disposed on the first connecting portion 111. The second light-shielding member 12 further includes a second bushing 15 disposed on the second connecting portion 121. The first bushing 14 and the second bushing 15 are threadedly connected to the first transmission portion 21 and the second transmission portion 22, respectively. The first bushing 14 and the second bushing 15 are easy to disassemble and assemble, facilitating subsequent maintenance or replacement of related parts.

[0040] In one example, the first connecting part 111 and the second connecting part 121 are L-shaped plates. The first bushing 14 and the second bushing 15 are respectively disposed on the L-shaped plates.

[0041] The drive assembly 2 in this embodiment further includes a first limiting member 24 and a second limiting member 25 connected to the drive shaft 23. A first transmission part 21 and a second transmission part 22 are disposed between the first limiting member 24 and the second limiting member 25. The first limiting member 24 and the second limiting member 25 are respectively used to limit the extreme positions of the movement of the first light-shielding member 11 and the second light-shielding member 12, preventing excessive movement of the first light-shielding member 11 and the second light-shielding member 12 and thus disengaging from the first transmission part 21 and the second transmission part 22. The first limiting member 24 and the second limiting member 25 can determine the maximum value of the collimation slit width 13.

[0042] In one example, the drive shaft 23 is a screw. The first limiting member 24 and the second limiting member 25 are both shaft retaining rings. An annular groove is provided on the screw to facilitate the installation and fixation of the shaft retaining rings. The first limiting member 24 and the second limiting member 25 are spaced apart along the axial direction of the screw. When the first light-blocking member 11 and the second light-blocking member 12 come into contact with the first limiting member 24 and the second limiting member 25 respectively, they can no longer move, and at this point, the width of the collimation slit 13 is at its maximum value. In this embodiment, the width adjustment range of the collimation slit 13 is 0 mm to 15 mm.

[0043] The front collimator 100 in this embodiment also includes a fixing block 3. The front collimator 100 can be conveniently and quickly connected to external structural components through the fixing block 3. The fixing block 3 is disposed between the first transmission part 21 and the second transmission part 22. The transmission shaft 23 is rotatably connected to the fixing block 3, and the fixing block 3 can rotate around the transmission shaft 23, which facilitates flexible adjustment of the position of the fixing block 3 during the connection with external structural components and improves assembly accuracy.

[0044] Optionally, the fixing block 3 includes a through hole perpendicular to the collimation slit 13. The drive shaft 23 is inserted into the through hole and clearance-fitted with the through hole to achieve a rotatable connection between them. The connection between the fixing block 3 and the drive shaft 23 is simple and reliable, and convenient for processing, manufacturing, and assembly. The outer peripheral surface of the fixing block 3 is provided with screw holes, which facilitates direct connection to external structural components using screws.

[0045] The first light-shielding member 11 in this embodiment further includes a first support 112 and a first tungsten-iron-nickel plate 113 disposed on the first support 112. A first groove is provided on the first support 112, and the first tungsten-iron-nickel plate 113 is seated in the first groove. The first tungsten-iron-nickel plate 113 can be connected and fixed to the first support 112 by screws and adhesive. The second light-shielding member 12 includes a second support 122 and a second tungsten-iron-nickel plate 123 disposed on the second support 122. A second groove is provided on the second support 122, and the second tungsten-iron-nickel plate 123 is seated in the second groove. The second tungsten-iron-nickel plate 123 can be connected and fixed to the second support 122 by screws and adhesive. A collimation slit 13 is formed between the first tungsten-iron-nickel plate 113 and the second tungsten-iron-nickel plate 123. Optionally, both the first light-shielding member 11 and the second light-shielding member 12 are plate-shaped structures.

[0046] In one example, the first support 112 and the second support 122 are respectively connected to the first transmission part 21 and the second transmission part 22. Alternatively, the first support 112 and the second support 122 are respectively connected to the first connecting part 111 and the second connecting part 121, and the first connecting part 111 and the second connecting part 121 are respectively connected to the first transmission part 21 and the second transmission part 22.

[0047] In this embodiment, there are two drive components 2, which are respectively disposed on opposite sides of the light-shielding component 1 along the extension direction of the collimation slit 13. The two drive components 2 work together to adjust the collimation slit 13, which can improve the positional stability of the first light-shielding member 11 and the second light-shielding member 12 during the adjustment process, and also improve the adjustment accuracy of the width of the collimation slit 13. Preferably, the drive components 2 are used to drive the first light-shielding member 11 and the second light-shielding member 12 to move synchronously.

[0048] Figure 2 A partial structure of the scanning imaging device is schematically shown. Combined with... Figure 2 and Figure 3 This invention also provides a scanning imaging device. The scanning imaging device includes a fixed bracket, an optomechanical assembly 4 mounted on the fixed bracket, and a front collimator 100 as described in the above embodiment. The optomechanical assembly 4 is fixed to an external mounting base via the fixed bracket. The optomechanical assembly 4 includes a light generator, such as an X-ray machine. The front collimator 100 is connected to the fixed bracket and positioned in the light output path of the optomechanical assembly 4. Because the collimation slit 13 width of the front collimator 100 can be adjusted according to actual needs, the scanning imaging device has strong adaptability and good versatility.

[0049] In one example, the front collimator 100 is connected to the fixed bracket via a fixing block 3. The fixed bracket is provided with a horizontal slot, and the fixing block 3 is inserted into the horizontal slot and fixed by screws.

[0050] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A front collimator for a scanning imaging device, characterized by, The application relates to a light shielding assembly and a driving assembly. The light shielding assembly comprises a first light shielding part and a second light shielding part arranged in parallel with the first light shielding part, and a collimating slit is formed between the first light shielding part and the second light shielding part. The driving assembly comprises a first transmission part connected with the first light shielding part, a second transmission part connected with the second light shielding part, and a driving part connected with the first transmission part and the second transmission part. The driving part synchronously drives the first light shielding part and the second light shielding part to move linearly in opposite directions to make the first light shielding part and the second light shielding part close to or away from each other, so as to adjust the width of the collimating slit.

2. The pre-collimator according to claim 1, characterized in that The width adjustment range of the collimating slit is 0mm to 15mm.

3. The pre-collimator of claim 1, wherein, The first light shielding part and the second light shielding part are both plate-shaped structures.

4. The pre-collimator of claim 1, wherein, The first transmission part and the second transmission part rotate to drive the first light shielding part and the second light shielding part to close to or away from each other.

5. The front-collimator according to claim 4, characterized in that, The driving assembly comprises a transmission shaft, the first transmission part and the second transmission part are thread segments coaxially arranged on the transmission shaft and have opposite rotation directions.

6. The front-collimator according to claim 5, characterized in that, The first light shielding part comprises a first connecting part, the second light shielding part comprises a second connecting part, the first transmission part is threadedly connected with the first connecting part, and the second transmission part is threadedly connected with the second connecting part.

7. The pre-collimator according to claim 6, characterized in that The first light shielding part further comprises a first shaft sleeve arranged on the first connecting part, the second light shielding part further comprises a second shaft sleeve arranged on the second connecting part, and the first shaft sleeve and the second shaft sleeve are threadedly connected with the first transmission part and the second transmission part respectively.

8. The pre-collimator according to claim 7, characterized in that The first connecting part and the second connecting part are L-shaped plates, and the first shaft sleeve and the second shaft sleeve are arranged on the L-shaped plates respectively.

9. The pre-collimator according to any one of claims 5 to 7, characterized in that, The driving assembly further comprises a first limiting part and a second limiting part connected with the transmission shaft, and the first transmission part and the second transmission part are arranged between the first limiting part and the second limiting part.

10. The front collimator of claim 9, wherein, The first limiting part and the second limiting part are shaft retaining rings, and the first limiting part and the second limiting part are arranged in parallel along the axial direction of the transmission shaft.

11. The pre-collimator according to any one of claims 5 to 7, characterized in that, The application further comprises a fixing block arranged between the first transmission part and the second transmission part, and the transmission shaft is rotatably connected with the fixing block.

12. The front collimator of claim 11, wherein, The fixing block comprises a through hole perpendicular to the collimating slit, and the transmission shaft is gap-fitted with the through hole to realize the rotatable connection.

13. The pre-collimator according to any one of claims 1 to 7, characterized in that The first light shielding part comprises a first support and a first tungsten-iron-nickel plate arranged on the first support, the second light shielding part comprises a second support and a second tungsten-iron-nickel plate arranged on the second support, the first transmission part is connected with the first support, the second transmission part is connected with the second support, and the first tungsten-iron-nickel plate and the second tungsten-iron-nickel plate form the collimating slit.

14. The front-collimator of claim 13, wherein, The first support is provided with a first groove, the first tungsten-iron-nickel plate is seated in the first groove, the second support is provided with a second groove, and the second tungsten-iron-nickel plate is seated in the second groove.

15. The pre-collimator according to any one of claims 1 to 7, characterized in that, The driving assembly is two and is arranged on opposite sides of the light shielding assembly along the extension direction of the collimating slit.

16. A scanning imaging apparatus, characterized by comprising: The application relates to a light shielding assembly and a driving assembly. A fixed support and a light engine assembly disposed on the fixed support; The front collimator according to any one of claims 1 to 15, which is connected with the fixed support and disposed on a light emitting path of the light engine assembly.

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