CN215066269U - Point scanning device with disc-type chopper wheel - Google Patents
Point scanning device with disc-type chopper wheel Download PDFInfo
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- CN215066269U CN215066269U CN202120520784.6U CN202120520784U CN215066269U CN 215066269 U CN215066269 U CN 215066269U CN 202120520784 U CN202120520784 U CN 202120520784U CN 215066269 U CN215066269 U CN 215066269U
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Abstract
The utility model discloses a point scanning device with a disc-type chopper wheel, which comprises a disc-type chopper wheel, an X-ray source part and a fan-shaped collimator; the disc type chopping wheel comprises a wheel hub, a positioning wheel disc, a tubular column collimator, a positioning mechanism and a lead shielding ring, wherein the positioning wheel disc is fixed on the outer peripheral surface of the wheel hub and is coaxial with the wheel hub, and a plurality of positioning mechanisms and tubular column collimators are arranged on the positioning wheel disc; the interior of the column collimator is provided with a column collimating hole extending along the length direction; the fan-shaped collimator is fixed with the X-ray source component, is positioned on the inner ring of the hub and is used for collimating X-rays generated by the X-ray source component to form fan-shaped ray beams and emitting the fan-shaped ray beams to the inner circumferential surface of the hub; the central axes of the tubular column collimation holes intersect at the ray source core, and the included angles of the central axes of the adjacent tubular column collimation holes are equal and larger than the central angle of the fan-shaped collimation hole. The utility model discloses chopper wheel part adopts novel dish formula structure, realizes that the chopper wheel is high-speed, small-size, light weight, economy.
Description
Technical Field
The utility model relates to an X ray back scattering imaging inspection technical field, concretely relates to a point scanning device who is used for X ray back scattering imaging system to have dish formula chopped wave wheel.
Background
The X-ray back scattering imaging inspection technology is an inspection technology which irradiates an object to be inspected by utilizing X-ray beam scanning, detects back scattering rays of the object to be inspected, analyzes and processes the back scattering rays and then images the back scattering rays. The back scattering detection adopts a point scanning technology, has the characteristics of low radiation dose and prominent detection images of light materials such as explosives, drugs and the like, is widely applied to the field of safety inspection of human bodies, goods and vehicles, and is used for anti-smuggling, anti-drug and anti-explosion inspection.
An X-ray backscatter imaging device usually employs a chopper wheel collimation technology to collimate X-rays into a continuously rotating pencil-shaped ray beam, and continuously scans an object to be detected point by point to complete point scanning backscatter imaging inspection. The most commonly used point scanning devices usually have several types, such as a cutting wheel collimator, a cylindrical jumper collimator, and a disc slit collimator.
The cutting wheel collimating device is completely sleeved on the periphery of an X-ray source and rotates around the X-ray source, the diameter of a bearing of the cutting wheel rotating mechanism is required to be larger than the overall dimension of the X-ray source, so that the turning radius of the cutting wheel is large, the moment of inertia is large, high-speed rotating scanning cannot be realized, the resolution ratio of a detected image is influenced, the imaging quality is not high, and the size and the weight of the whole detection equipment are increased. The pencil-shaped ray beams of each exit angle of the cylindrical jumper wire collimation device have the problems of different sections of the ray beams, intermittent scanning affects the detection imaging quality, and meanwhile, the incident spiral slit and the exit spiral slit are complex to process and high in manufacturing cost. When the collimating slits of the disc slit chopper wheel rotate to different positions, the exit angles of the pencil-shaped ray beams are different, the sections of the ray beams are different, and the scanning detection imaging quality is influenced.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the utility model aims at providing a point scanning device with dish formula chopped wave wheel.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a point scanning device with a disc-type chopper wheel comprises a disc-type chopper wheel, an X-ray source part and a fan-shaped collimator; the disc type chopping wheel comprises a hub, a positioning wheel disc, a tubular column collimator, positioning mechanisms and a lead shielding ring, wherein the lead shielding ring is fixed on and covers the inner circumferential surface of the hub; the inner part of the tubular column collimator is provided with a tubular column collimation hole extending along the length direction, the inlet end of the tubular column collimation hole is communicated with the inner ring of the hub, and the outlet end of the tubular column collimation hole is communicated with the outside; the fan-shaped collimator and the X-ray source component are fixed, and a ray source core of the X-ray source component is positioned on a central axis of a fan-shaped collimating hole of the fan-shaped collimator and is positioned on the same straight line with the central axis of the hub; the fan-shaped collimator is positioned on the inner ring of the hub and used for collimating X-rays generated by the X-ray source component to form fan-shaped ray beams and emitting the fan-shaped ray beams to the inner circumferential surface direction of the hub; the central axis of each pipe column collimation hole is intersected with the ray source core and is positioned on the same plane with the central axis of the fan-shaped collimation hole, the included angle of the central axes of the adjacent pipe column collimation holes is equal and larger than the central angle of the fan-shaped collimation hole, and the inlet end of at most one pipe column collimation hole is positioned in the emergent range of the fan-shaped collimation hole at the same moment; the hub is in transmission connection with the power device and is driven by the power device to rotate.
Furthermore, the disc-type chopped wave wheel also comprises a bearing cantilever frame and a driving shaft part, wherein the driving shaft part is connected with a bearing at the top of the bearing cantilever frame, one end of the driving shaft part is in transmission connection with an output shaft of a driving motor, and the other end of the driving shaft part is in transmission connection with a wheel hub.
Furthermore, one end of the X-ray source component, which is far away from the fan-shaped collimator, is connected with a supporting base, and the bottom surface of the supporting base and the bottom surface of the bearing cantilever frame are located on the same horizontal plane.
Further, the column collimator is made of a high-density material which can effectively shield X-rays and has mechanical structural strength satisfying design requirements.
Further, the cross-sectional shape of the pipe column collimation hole is circular or rectangular.
Furthermore, the wheel hub is made of high-quality structural steel, and the positioning wheel disc is made of high-strength aluminum.
Furthermore, a plurality of dynamic balance weight holes with the same radius are arranged on the positioning wheel disc along the circumferential direction, and the dynamic balance weight holes are arranged at the same angle.
Furthermore, a plurality of dynamic balance auxiliary weight holes with equal radiuses are formed in the hub along the circumferential direction, and the dynamic balance auxiliary weight holes are arranged at equal angles.
Furthermore, a plurality of rows of synchronous signal photoelectric holes are formed in the hub, the number of the rows of synchronous signal photoelectric holes is the same as that of the column collimators, the synchronous signal photoelectric holes are distributed along the circumferential direction, one row of synchronous signal photoelectric hole is formed between every two adjacent column collimators, and the centers of the rows of synchronous signal photoelectric holes are located on an angular bisector of an included angle of central axes of the two adjacent column collimator holes; two column synchronous signal control plates are respectively arranged on two sides of the column synchronous signal photoelectric hole along the central axis direction, wherein one column synchronous signal control plate is provided with a photoelectric transmitting end, and the other column synchronous signal control plate is provided with a photoelectric receiving end; the boundaries of two sides of the fan-shaped collimation hole are a screwing-in boundary and a screwing-out boundary in sequence along the rotation direction of the hub, and when the inlet end of the tubular column collimation hole rotates to reach the screwing-in boundary of the fan-shaped collimation hole, a row of synchronous signal photoelectric holes are just corresponding to the photoelectric transmitting end and the photoelectric receiving end respectively.
Furthermore, a wheel synchronization signal photoelectric hole is arranged right above or below one column synchronization signal photoelectric hole; two photoelectric transmitting ends are arranged on one column synchronous signal control board, two photoelectric receiving ends are arranged on the other column synchronous signal control board, and the two photoelectric transmitting ends and the two photoelectric receiving ends are respectively positioned on a vertical straight line; when the column synchronous signal photoelectric holes of the wheel synchronous signal photoelectric holes are rotated to correspond to the two column synchronous signal control plates, the column synchronous signal photoelectric holes just correspond to one photoelectric transmitting end and one photoelectric receiving end, and the wheel synchronous signal photoelectric holes just correspond to the other photoelectric transmitting end and the other photoelectric receiving end.
The beneficial effects of the utility model reside in that:
1) the utility model discloses in, chopper wheel part adopts novel dish formula structure, and the design of rim plate, wheel hub and tubular column collimater helps optimizing chopper wheel size, simplifies chopper wheel structure, reduces chopper wheel inertia, improves chopper wheel rotational speed, and then promotes and surveys image resolution, realizes that the chopper wheel is high-speed, small-size, light weight, economy.
2) The utility model discloses an adopt location rim plate and positioning mechanism to realize the setting of tubular column collimater, guarantee that the tubular column collimater is reliably connected and accurate location, make the pencil of a stroke shape bundle of rays scanning more accurate, improve and survey image quality.
3) The utility model discloses a tubular column collimater is made to high density material that can shield X ray and have certain mechanical structure intensity again such as ferrotungsten nickel alloy, ensures the pencil form after the collimation and restraints cross-section such as ray, and the ray bundle energy is concentrated in the high energy region, improves the ray detection penetrating power.
4) The utility model discloses in, when the chopper wheel produced synchronous photoelectric signal control detector signal acquisition, the spacing braking of control chopper wheel driving motor ensured the chopper wheel braking back, and the tubular column collimater is not at fan-shaped collimation hole within range, prevents to leak at non-detection during operation ray irradiation.
Drawings
Fig. 1 is a schematic view of an overall structure of a spot scanning apparatus according to an embodiment of the present invention;
fig. 2 is a schematic transverse cross-sectional view of a spot scanning apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along the direction B in FIG. 2;
FIG. 4 is an enlarged view of portion A of FIG. 3;
fig. 5 is a schematic diagram of the optical path design according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
The embodiment provides a point scanning device with a disk chopper wheel, as shown in fig. 1-4, comprising a disk chopper wheel, an X-ray source component 4 and a sector collimator 3; the disc type chopping wheel comprises a hub 11, a positioning wheel disc 12, a tubular column collimator 13, a positioning mechanism 14 and a lead shielding ring 15, wherein the lead shielding ring 15 is fixed on and covers the inner circumferential surface of the hub 11, the positioning wheel disc 12 is fixed on the outer circumferential surface of the hub 11 and is coaxial with the hub 11, the positioning wheel disc 12 is provided with a plurality of positioning mechanisms 14 and tubular column collimators 13, one end of the tubular column collimator 13 penetrates through and is fixedly connected with the hub 11 and the lead shielding ring 15, and the other end of the tubular column collimator 13 is connected with the positioning mechanisms 14; the interior of the column collimator 13 is provided with a column collimating hole 131 extending along the length direction, the inlet end of the column collimating hole 131 is communicated with the inner ring of the hub 11, and the outlet end of the column collimating hole 131 is communicated with the exterior; the sector collimator 3 and the X-ray source component 4 are fixed, and a ray source core 401 of the X-ray source component 4 is located on a central axis of a sector collimating hole of the sector collimator and is located on the same straight line with a central axis of the hub 11; the fan-shaped collimator 3 is positioned at the inner ring of the hub 11 and is used for collimating the X-rays generated by the X-ray source component 4 to form fan-shaped ray beams and emitting the fan-shaped ray beams to the inner circumferential surface direction of the hub 11; the central axis of each column collimation hole 131 intersects with the ray source core 401 and is positioned on the same plane with the central axis of the fan-shaped collimation hole, the included angle of the central axes of the adjacent column collimation holes 131 is equal and larger than the central angle of the fan-shaped collimation hole, and the inlet end of at most one column collimation hole 131 is positioned in the emergent range of the fan-shaped collimation hole at the same time; the hub 11 is drivingly connected to and driven to rotate by the power unit.
In the spot scanning device, the X-rays of the X-ray unit 4 are emitted from the source core 401, collimated into fan-shaped beams by the fan-shaped collimating holes in the fan collimator 3, and emitted in the direction of the inner peripheral surface of the hub 11. In the process that the hub 11 rotates around the fan-shaped collimator 3 at a high speed, when reaching the inlet end of the non-pipe column collimation hole on the inner circumferential surface of the hub 11, the fan-shaped ray beam is shielded by the lead shielding ring 15 and cannot be emitted to the outside of the hub, and when reaching the inlet end of the pipe column collimation hole, the fan-shaped ray beam enters the pipe column collimation hole from the inlet end of the pipe column collimation hole and is collimated into a pen-shaped ray beam and then is emitted from the outlet end to irradiate the detected object. After the scanning is stopped, the hub 11 stops rotating, and it is necessary to ensure that all the column collimation holes 131 are not in the emergence range of the fan-shaped collimation holes after the hub 11 is completely stationary, so as to prevent ray leakage during non-detection operation.
The included angle of the central axes of the adjacent pipe column collimating holes 131 is larger than the central angle of the fan-shaped collimating holes, and in the rotating process of the hub 11, at most one pipe column collimating hole 131 is in the emitting range of the fan-shaped collimating holes at the same time, so that only one beam of rays is emitted from the disc-type chopper wheel all the time. With the high-speed rotation of the hub 11, the column collimator 13 rotates together within the range of the fan-shaped collimating aperture, so that the rays are collimated into a pencil-shaped beam through the column collimating aperture 131 and irradiate on the object to be detected, thereby completing a column of scanning from top to bottom of the object to be detected.
In this embodiment, the column collimator 13 includes four column collimating holes 131, the included angle between the central axes of the adjacent column collimating holes is 90 °, and the central angle of the fan-shaped collimating hole of the fan-shaped collimator 3 is 86 °.
Specifically, the inlet end of the collimating hole of the column collimator 13 is screwed with the boss 11 and the lead shield ring 15.
Specifically, in this embodiment, the disc chopper wheel further includes a bearing cantilever frame 7 and a driving shaft member 6, the driving shaft member 6 is connected to a bearing at the top of the bearing cantilever frame 7, one end of the driving shaft member is in transmission connection with the output shaft of the driving motor 1, and the other end of the driving shaft member is in transmission connection with the hub 11. The disc-type chopping impeller is supported by the bearing cantilever frame 7, so that the design and use conditions of a high-speed and high-precision bearing can be met, the chopping impeller can finally rotate at high speed accurately, stably and reliably, high-speed scanning is realized, and the image resolution is improved. The rotation speed of the drive motor 1 can be set according to the scanning speed.
Further, in this embodiment, one end of the X-ray source component 4 away from the sector collimator 13 is connected to the supporting base 2, and a bottom surface of the supporting base 2 and a bottom surface of the bearing cantilever 7 are located on the same horizontal plane, so as to facilitate positioning and installation of the apparatus.
Further, the column collimator 13 is made of a high-density material, such as inconel, which can effectively shield X-rays and has mechanical structural strength satisfying design requirements. The cross-sectional shape of the column alignment hole 131 may be circular or rectangular.
Furthermore, the hub 11 is made of high-quality structural steel, and the positioning wheel disc 12 is made of high-strength aluminum, so that the weight and the moment of inertia of the chopper wheel are further reduced, and the lightweight design is realized.
Furthermore, a plurality of dynamic balance weight holes 121 with equal radius are arranged on the positioning wheel disc 12 along the circumferential direction, and the dynamic balance weight holes 121 are arranged at equal angles. The dynamic balance weight hole 121 is used for dynamic balance correction of the disc type chopping wheel component. In this embodiment, the number of the dynamic balance weight ports 121 is 8, and one dynamic balance weight port is provided every 45 °.
Furthermore, a plurality of dynamic balance auxiliary weight holes 111 with equal radius are arranged on the hub 11 along the circumferential direction, and the dynamic balance auxiliary weight holes 111 are arranged at equal angles. The dynamic balance auxiliary weight hole 111 is used for further assisting the dynamic balance correction of the disc chopper wheel component.
It should be noted that, the disc chopper wheel inevitably generates deviation due to processing, assembly and other reasons, a dynamic balance tester can be used to detect the unbalanced mass and position of the disc chopper wheel, and a counterweight method is used to fix a corresponding counterweight on the dynamic balance counterweight hole 121 or the dynamic balance auxiliary counterweight hole 111 at the corresponding position, so as to complete dynamic balance correction.
Further, a plurality of column synchronization signal photoelectric holes 112 are arranged on the hub 11, the number of the column synchronization signal photoelectric holes 112 is the same as that of the column collimators 13, the column synchronization signal photoelectric holes are distributed along the circumferential direction, one column synchronization signal photoelectric hole 112 is arranged between every two adjacent column collimators 13, and the centers of the column synchronization signal photoelectric holes 112 are located on an angular bisector of an included angle between central axes of the two adjacent column collimation holes 131; two column synchronous signal control plates 5 are respectively arranged on two sides of the column synchronous signal photoelectric hole 112 along the central axis direction, wherein one column synchronous signal control plate 5 is provided with a photoelectric transmitting end, and the other column synchronous signal control plate 5 is provided with a photoelectric receiving end; the boundaries of the two sides of the fan-shaped collimating hole 131 are a screwing-in boundary and a screwing-out boundary in turn along the rotation direction of the hub, and when the inlet end of the tubular column collimating hole 131 rotates to reach the screwing-in boundary of the fan-shaped collimating hole, a row of synchronous signal photoelectric holes 112 are exactly corresponding to the photoelectric transmitting end and the photoelectric receiving end respectively.
In the present embodiment, 4 column synchronization signal photoelectric holes 112 are provided on the hub 11 at 4 × 90 ° intervals, respectively, corresponding to 4 column collimators 13.
It should be noted that the two column synchronization signal control boards are independently and fixedly arranged and do not rotate along with the hub. In the rotating process of the hub, the column synchronization signal control board provided with the photoelectric transmitting end continuously generates infrared beams, and when the column synchronization signal photoelectric holes correspond to the column synchronization signal photoelectric holes, the infrared beams penetrate through the column synchronization signal photoelectric holes to be received by the column synchronization signal control board provided with the photoelectric receiving end to generate column synchronization signals. The column synchronization signal control board provided with a photoelectric receiving end transmits the column synchronization signal to the signal acquisition system, and the signal acquisition system performs timing synchronization calibration on the detection signal by using the column synchronization signal, so that a computer image is regenerated and displayed as an image. In this embodiment, 4 rows of time-series photoelectric signals are generated for each revolution.
Further, in the present embodiment, a wheel sync signal photoelectric hole 113 is provided directly above or directly below one of the column sync signal photoelectric holes 112; two photoelectric transmitting ends are arranged on one column synchronous signal control plate 5, two photoelectric receiving ends are arranged on the other column synchronous signal control plate 5, and the two photoelectric transmitting ends and the two photoelectric receiving ends are respectively positioned on a vertical straight line; when the column synchronization signal photoelectric hole 112 directly above or below the wheel synchronization signal photoelectric hole 113 rotates to correspond to the two column synchronization signal control boards 5, the column synchronization signal photoelectric hole 112 corresponds to one of the photoelectric emitting end and the photoelectric receiving end, and the wheel synchronization signal photoelectric hole 113 corresponds to the other photoelectric emitting end and the photoelectric receiving end.
When the wheel synchronizing signal photoelectric hole rotates to correspond to the two rows of synchronizing signal control boards, the infrared light beam emitted by the photoelectric emitting end corresponding to the position passes through the wheel synchronizing signal photoelectric hole and is received by the corresponding photoelectric receiving end, so that a wheel synchronizing signal is generated, the corresponding row synchronizing signal control boards transmit the wheel synchronizing signal to the signal acquisition system, the wheel synchronizing signal can be used for detecting the rotating speed of the chopping wheel in real time on one hand, and can be used for dividing and calibrating the generation time sequence of the first row of detection signals on the other hand, and then sequentially generating a second row of detection signals, a third row of detection signals and a fourth row of detection signals, and the braking stop position (the rotating angle of 45 degrees in the embodiment) of the tubular column collimator 13 can be determined by using the wheel synchronizing signal, so that the emission of non-detection rays is ensured.
It should be noted that, because the image quality and resolution are affected by the size of the scanning spot and the scanning speed, under a certain condition, the smaller the scanning spot diameter and the higher the scanning speed, the higher the resolution of the image and the better the image quality. Therefore, to improve the resolution and image quality of the scanned image, it is necessary to appropriately reduce the scanning spot size and increase the chopper wheel rotation speed.
As shown in fig. 5, D1 represents the outer diameter of the ray emitting area, D2 represents the ray collimating aperture, and when the X-ray emitting point is at the periphery of the center of the D1 circle, the emitted X-ray should be shielded as much as possible to increase the spot size. Wherein, L1, L2 indicate the length of the collimation hole when the radius of the hub 11 is R1, L1 indicates that the column collimator extends out of the hub 11, and L2 indicates that the length of the column collimator is the same as the thickness of the hub 11. L3 represents the alignment bore length for a radius of the hub 11 of R2, R1 is less than R2, and L3 is equal to L2. As can be seen from fig. 5, the exit included angles β 1, β 2, and β 3 of L1, L2, and L3 respectively corresponding to the X-rays are different, where the exit angle β 1 corresponding to L1 is the smallest, and the corresponding light spot is the smallest, so as to satisfy the design requirements of the highest resolution and the smallest single detection dose. When the X-ray emergent point is at a position less than or equal to the diameter D1, the collimated light spot effect of the collimated lengths L1 and L3 is the same, and the collimated light spot effect of the collimated length L2 is relatively worst. In addition, the hub having a radius of R2 has a large structural size, weight, and moment of inertia, and increases the manufacturing difficulty and processing cost. Therefore, the chopping wheel structure is light in weight and small in size by adopting a smaller hub radius and a longer length of the tubular column collimator.
Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (10)
1. A point scanning device with a disc-type chopper wheel is characterized by comprising the disc-type chopper wheel, an X-ray source part and a fan-shaped collimator; the disc type chopping wheel comprises a hub, a positioning wheel disc, a tubular column collimator, positioning mechanisms and a lead shielding ring, wherein the lead shielding ring is fixed on and covers the inner circumferential surface of the hub; the inner part of the tubular column collimator is provided with a tubular column collimation hole extending along the length direction, the inlet end of the tubular column collimation hole is communicated with the inner ring of the hub, and the outlet end of the tubular column collimation hole is communicated with the outside; the fan-shaped collimator and the X-ray source component are fixed, and a ray source core of the X-ray source component is positioned on a central axis of a fan-shaped collimating hole of the fan-shaped collimator and is positioned on the same straight line with the central axis of the hub; the fan-shaped collimator is positioned on the inner ring of the hub and used for collimating X-rays generated by the X-ray source component to form fan-shaped ray beams and emitting the fan-shaped ray beams to the inner circumferential surface direction of the hub; the central axis of each pipe column collimation hole is intersected with the ray source core and is positioned on the same plane with the central axis of the fan-shaped collimation hole, the included angle of the central axes of the adjacent pipe column collimation holes is equal and larger than the central angle of the fan-shaped collimation hole, and the inlet end of at most one pipe column collimation hole is positioned in the emergent range of the fan-shaped collimation hole at the same moment; the hub is in transmission connection with the power device and is driven by the power device to rotate.
2. The spot-scanning apparatus with a disc chopper wheel as claimed in claim 1, wherein said disc chopper wheel further comprises a bearing cantilever and a driving shaft member, said driving shaft member is connected to the bearing at the top of said bearing cantilever, and one end of said driving shaft member is drivingly connected to the output shaft of the driving motor, and the other end of said driving shaft member is drivingly connected to the hub.
3. The spot-scanning apparatus with a disk chopper wheel as claimed in claim 1, wherein a support base is connected to an end of the X-ray source assembly away from the sector collimator, and a bottom surface of the support base and a bottom surface of the bearing cantilever are located on a same horizontal plane.
4. The spot scanning apparatus having a disc chopper wheel as claimed in claim 1, wherein the column collimator is made of a high-density material capable of effectively shielding X-rays and having a mechanical structural strength satisfying design requirements.
5. The spot-scanning apparatus with a disc chopper wheel as claimed in claim 1, wherein the cross-sectional shape of the column collimating hole is circular or rectangular.
6. The spot-scanning apparatus with a disc chopper wheel as claimed in claim 1, wherein the hub is made of high quality structural steel and the positioning wheel disc is made of high strength aluminum.
7. The spot scanning apparatus having a disc chopper wheel as claimed in claim 1, wherein the positioning wheel has a plurality of dynamic balancing weight holes with equal radius along a circumferential direction, and the dynamic balancing weight holes are arranged at equal angles.
8. The spot scanning apparatus having a disc chopper wheel as claimed in claim 7, wherein the hub has a plurality of dynamic balance auxiliary weight holes with equal radius along a circumferential direction, and the dynamic balance auxiliary weight holes are arranged at equal angles.
9. The spot scanning apparatus with the disc-type chopper wheel as claimed in claim 1, wherein a plurality of column synchronization signal photoelectric holes are formed in the hub, the number of the column synchronization signal photoelectric holes is the same as the number of the column collimators and is distributed along a circumferential direction, one column synchronization signal photoelectric hole is formed between every two adjacent column collimators, and the centers of the column synchronization signal photoelectric holes are located on an angular bisector of an included angle between central axes of the two adjacent column collimator holes; two column synchronous signal control plates are respectively arranged on two sides of the column synchronous signal photoelectric hole along the central axis direction, wherein one column synchronous signal control plate is provided with a photoelectric transmitting end, and the other column synchronous signal control plate is provided with a photoelectric receiving end; the boundaries of two sides of the fan-shaped collimation hole are a screwing-in boundary and a screwing-out boundary in sequence along the rotation direction of the hub, and when the inlet end of the tubular column collimation hole rotates to reach the screwing-in boundary of the fan-shaped collimation hole, a row of synchronous signal photoelectric holes are just corresponding to the photoelectric transmitting end and the photoelectric receiving end respectively.
10. The spot-scanning apparatus having a disc chopper wheel as claimed in claim 9, wherein a wheel sync signal photoelectric hole is provided directly above or below one of the column sync signal photoelectric holes; two photoelectric transmitting ends are arranged on one column synchronous signal control board, two photoelectric receiving ends are arranged on the other column synchronous signal control board, and the two photoelectric transmitting ends and the two photoelectric receiving ends are respectively positioned on a vertical straight line; when the column synchronous signal photoelectric holes of the wheel synchronous signal photoelectric holes are rotated to correspond to the two column synchronous signal control plates, the column synchronous signal photoelectric holes just correspond to one photoelectric transmitting end and one photoelectric receiving end, and the wheel synchronous signal photoelectric holes just correspond to the other photoelectric transmitting end and the other photoelectric receiving end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120520784.6U CN215066269U (en) | 2021-03-12 | 2021-03-12 | Point scanning device with disc-type chopper wheel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120520784.6U CN215066269U (en) | 2021-03-12 | 2021-03-12 | Point scanning device with disc-type chopper wheel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230138961A1 (en) * | 2014-11-20 | 2023-05-04 | Viken Detection Corporation | X-Ray Scanning System with High X-Ray Energy |
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2021
- 2021-03-12 CN CN202120520784.6U patent/CN215066269U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230138961A1 (en) * | 2014-11-20 | 2023-05-04 | Viken Detection Corporation | X-Ray Scanning System with High X-Ray Energy |
| US11942232B2 (en) * | 2014-11-20 | 2024-03-26 | Viken Detection Corporation | X-ray scanning system with high x-ray energy |
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