Beam calibration device and its operating procedures and radiation imaging system and its operating procedures

Abstract

Beam calibration device comprising a drive section (1), a cam section (2), a roller (311) and a calibration section (3), wherein the calibration section (3) is located below the cam section (2); the drive section (1) is designed to drive the cam section (2) so that it rotates; and the cam section (2) is designed to exert a force on the calibration section (3) to enable the calibration section (3) to move downwards into a jet area, the cam section (2) being in contact with the roller (311) and exerting a force on it to drive the calibration section (3).

Description

Territory of Revelation

[0001] The present disclosure belongs to the field of radiation imaging technology and relates specifically to a radiation calibration device and its operating procedure and to a radiation imaging system and its operating procedure. Background of the Revelation

[0002] Currently, in a radiation imaging process, the power of the substance penetrated by the beams must be calibrated to correctly adjust the beams and image parameters to obtain an adequate detection image. In existing radiation imaging technology, common beam calibration devices are divided into independent calibration devices and calibration devices integrated with accelerators (radiation sources). An independent calibration device is positioned between the radiation source and a detector. This device is generally large in size and weight and is typically suitable for environments with relatively large spaces and locations.The calibration device integrated with the accelerator (the radiation source) refers to the fact that the calibration device and the accelerator (the radiation source) are integrated into one part, so that the beam calibration device has a compact structure and is adaptable to the universal use of vehicle-mounted container detection systems and the calibration requirements of various substances.

[0003] Among the calibration devices integrated with the accelerators (the radiation sources), stepwise scanning calibration devices and layer-by-layer superposition calibration devices are common. However, their structures require lead screws to provide the drive forces to cause the press blocks to move back and forth. Due to such structures, which cause the press blocks to move back and forth, the calibration efficiency is low and the required space is relatively large, which is also disadvantageous for reducing the volume of the accelerators. From DE 198 32 973 A1, a filter changer for a beam transmitter is known, wherein a filter can be adjusted into the beam path of the beam transmitter via a linkage. An electromagnet is designed as an electromechanical drive for adjusting the filter. Summary of Revelation

[0004] In view of the problems that existing calibration devices have low calibration efficiency and require relatively large spaces, the present disclosure provides both a beam calibration device whose structure is compact, whose space occupancy is small and which has high calibration efficiency, with an operating method, and a radiation imaging system with an operating method.

[0005] The technical solution used in the present disclosure to solve the technical problems is a beam calibration device comprising a drive section, a cam section, a roller and a calibration section, wherein the calibration section is located below the cam section; the drive section is designed to drive the cam section so that it rotates; and the cam section is designed to exert a force on the calibration section to enable the calibration section to move downwards into a jet area, the cam section being in contact with the roller and exerting a force on it to drive the calibration section.

[0006] The calibration section includes a calibration connection unit and a calibration block, wherein the calibration block is arranged below the calibration connection unit and is rigidly connected to the calibration connection unit; the cam section is designed to exert force on the calibration linkage unit to allow the calibration linkage unit to move downwards; and The calibration link unit is designed to drive the calibration block so that it moves downwards into the beam area.

[0007] The calibration section further includes a reset section, wherein the reset section is located below the calibration connection unit and is connected to the calibration connection unit; and The reset section is designed to create an upward restoring force for the calibration link unit, so that the calibration link unit drives the calibration block, causing it to return to an initial position.

[0008] The beam calibration device further includes a shielding section, wherein the reset section includes a reset spring, one end of the reset spring is connected to the calibration link unit and the other end of the reset spring is connected to the shielding section.

[0009] The beam calibration device further comprises a guide slide rail, wherein a sliding block is arranged on the calibration connection unit so that it engages with the guide slide rail, and the calibration connection unit is slidably connected to the guide slide rail by means of the sliding block; and The calibration connection unit moves along the guide rail in the vertical direction through the sliding block.

[0010] The roller is arranged on the calibration connection unit; wherein the roller is designed to rotate when the cam section exerts force on the calibration link unit in order to reduce the frictional force between the calibration link unit and the cam section.

[0011] The cam section contains at least one lower cam, wherein each lower cam contains a base circle section and a base block, the base block being located on the base circle section, a front end of the base block having an inclination structure, and a rear end of the base block having an inclination structure; and The base block is designed to press the calibration connection unit downwards.

[0012] Each lower cam further contains at least one additional block, wherein the additional block is arranged on the base circle segment and is located behind the base block, the front end of the additional block has an inverted inclination structure to match the inclination structure of the rear end of the base block, and the rear end of the additional block has an inclination structure.

[0013] The structures of the base blocks of the lower cams are completely identical.

[0014] The structures of the additional blocks are completely identical.

[0015] There is at least one calibration section, with each calibration section corresponding to a lower cam.

[0016] The cam section comprises several lower cams, with the number of additional blocks of the several lower cams being different.

[0017] The beam calibration device further includes a drive shaft, wherein the base circular section is arranged on the drive shaft, so that the lower cam is arranged on the drive shaft.

[0018] There are several lower cams, with the multiple lower cams arranged sequentially on the drive shaft.

[0019] The drive section comprises a motor, a drive sprocket, a driven sprocket, and a drive chain, wherein the drive chain runs around the drive sprocket and the driven sprocket, and the driven sprocket is arranged on the drive shaft; and the motor is designed to drive the drive sprocket so that it rotates and drives the driven sprocket through the drive chain so that it rotates, causing the drive shaft to rotate.

[0020] As a further technical solution, the present disclosure also provides a radiation imaging system comprising a radiation source and a beam calibration device, wherein the beam calibration device is any beam calibration device described above; and the radiation source is designed to emit radiation to the calibration section when the calibration section enters the radiation area.

[0021] As a further technical solution, the present disclosure also provides a working method of the jet calibration device, wherein the jet calibration device comprises a drive section, a cam section, a roller and a calibration section, wherein the calibration section is located below the cam section, and wherein the working method comprises: Drive, through the drive section, of the cam section, so that it rotates; and Exerting, through the cam section, a force on the calibration section to enable the calibration section to move downwards into a beam area, the cam section being in contact with the roller and exerting a force on it to drive the calibration section.

[0022] The operating procedure of the beam calibration device further includes: Providing, through a reset section, an upward restoring force for a calibration link unit of the calibration section, so that the calibration link unit drives the calibration block so that it returns to an initial position.

[0023] As a further technical solution, the present disclosure further provides a working method of a radiation imaging system, wherein the radiation imaging system comprises a radiation source and a beam calibration device, and the beam calibration device comprises a drive section, a cam section, a roller and a calibration section, wherein the calibration section is located below the cam section, wherein the working method comprises: Drive, through the drive section, of the cam section, so that it rotates; Exerting, through the cam section, a force on the calibration section to enable the calibration section to move downwards into a beam area, the cam section being in contact with the roller and exerting a force on it to drive the calibration section; Emitting, through the radiation source, of rays to the calibration section when the calibration section enters the radiation area; and Monitoring the parameters of the radiation imaging system by the rays passing through the calibration section.

[0024] In both the beam calibration device and its working method, and in the radiation imaging system and its working method of the present disclosure, the beam calibration device comprises the drive section, the cam section and the calibration section, wherein the drive section is designed to drive the cam section so that it rotates, and wherein the cam section is designed to exert the force on the calibration section to enable the calibration section to move downwards into the beam area.No lead screw is required to provide a driving force, and consequently, a press block does not need to move back and forth, thus improving calibration efficiency; furthermore, the lead screw is linear and no lead screw needs to be arranged, so that the structure of the beam calibration device can be more compact and the space requirement is reduced.

[0025] The beam calibration device of the present disclosure is suitable for the radiation imaging system in which the beam calibration device is integrated with an accelerator (the radiation source). Brief description of the drawings Fig. Figure 1 is a schematic structural drawing of a beam calibration device in a first embodiment of the present disclosure; Fig. Figure 2 is a schematic drawing of an operating state of the beam calibration device in Fig. 1; Fig. Figure 3 is a front view of a cam section in Fig. 1; Fig. Figure 4 is a side view of the cam section in Fig. 1; Fig. Figure 5 is a schematic structural drawing of a lower cam in Fig. 1; Fig. Figure 6 is a schematic structural drawing of a radiation imaging system in a second embodiment of the present disclosure; Fig. Figure 7 is a schematic flow chart of a working procedure of a beam calibration device in a third embodiment of the present disclosure; Fig. Figure 8 is a schematic flow chart of a working procedure of a beam calibration device in a fourth embodiment of the present disclosure; where the reference numerals are as follows: 1. Drive section; 11. Motor; 12. Drive sprocket; 13. Drive chain; 14. Driven sprocket; 2. Cam section; 21. Lower cam section; 211. Base circle section; 212. Auxiliary block; 213. Base block; 3. Calibration section; 31. Calibration linkage unit; 311. Roller; 32. Calibration block; 33. Reset section; 4. Shielding section; 5. Guide rail; 6. Drive shaft; 100. Beam calibration device; and 200. Beam source. Detailed description of the embodiments

[0026] In order to enable experts in the field to better understand the technical solutions of the present disclosure, the present disclosure is described in more detail below in combination with the attached drawings and the specific embodiments. The first embodiment

[0027] In the Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. In embodiment 5, a beam calibration device is created comprising a drive section 1, a cam section 2 and a calibration section 3, wherein the calibration section 3 is located below the cam section 2; the drive section 1 is designed to drive the cam section 2 so that it rotates; and the cam section 2 is designed to exert a force on the calibration section 3 to enable the calibration section 3 to move downwards into a beam area.

[0028] Preferably, the calibration section 3 comprises a calibration connection unit 31 and a calibration block 32, wherein the calibration block 32 is arranged below the calibration connection unit 31 and is firmly connected to the calibration connection unit 31.

[0029] Out of Fig. As can be seen in Figure 1, the calibration connection unit 31 is arranged on one side close to the cam section 2 above the calibration block 32. Of course, the calibration connection unit 31 and the calibration block 32 can be two separate structures, or they can be an integral structure, i.e., formed in one piece, as long as the calibration connection unit 31 and the calibration block 32 can be attached to each other.

[0030] The cam section 2 is designed to exert force on the calibration connection unit 31 to enable the calibration connection unit 31 to move downwards; wherein the calibration connection unit 31 is designed to drive the calibration block 32 so that it moves downwards into the beam area.

[0031] Because the calibration connection unit 31 is arranged above the calibration block 32, and the force exerted on the cam section 2 acts on the calibration connection unit 31 earlier than on the calibration block 32, the calibration connection unit 31 moves downwards earlier due to the force exerted by the cam section 2. Since the calibration connection unit 31 is rigidly connected to the calibration block 32, the calibration connection unit 31 moves downwards, driving the calibration block 32 so that it also moves downwards under the influence of the force, thus entering the beam area.

[0032] Preferably, the calibration section 3 further comprises a reset section 33, wherein the reset section 33 is located below and connected to the calibration connection unit 31. The reset section 33 is configured to provide an upward restoring force for the calibration connection unit 31, so that the calibration connection unit 31 drives the calibration block 32, causing it to return to an initial position. The initial position here refers to a position in which the calibration block 32 is located away from the beam area and is not penetrated by the beams.

[0033] Preferably, the beam calibration device further comprises a shielding section 4. The reset section 33 contains a reset spring. One end of the reset spring is connected to the calibration connection unit 31, while the other end of the reset spring is connected to the shielding section 4. The reason for choosing this reset spring is that it is easy to compress and extend and can automatically deform in response to the application and release of the actuating force to provide the restoring force. The reset section 33 is, of course, not limited to the reset spring and can also have a different structure, as long as the effect of providing the restoring force can be achieved, which is not described redundantly here.

[0034] Preferably, the roller 311 is arranged on the calibration connection unit 31; wherein the roller 311 is designed to rotate when the cam section 2 exerts force on the calibration connection unit 31 in order to reduce the frictional force between the calibration connection unit 31 and the cam section 2.

[0035] In Fig. 1 and Fig. 2 is Fig. 1 a schematic drawing of a working state of the beam calibration device, while Fig. Figure 2 is a schematic drawing of another operating state of the beam calibration device. When the beam calibration device is operating, the cam section 2 rotates clockwise according to the drive of the drive section 1, moving from the position in Fig. 1 to the position in Fig. 2 rotates. At this point, the cam section 2 is in contact with the roller 311, exerting the force on it to drive the calibration section 3 so that it moves downwards, causing the calibration block 32 to move downwards, with one section (i.e., the one below the shielding section 4 in Fig. 2 exposed section) of the calibration block 32 enters the beam area, so that the beams penetrate the section of the calibration block 32 entering the beam area. At this point, the reset section 33 deforms, being compressed. The drive section 1 rotates continuously clockwise to drive the cam section 2, so that it rotates until the rear end (one end away from the roller 311 in Fig. 1) of the cam section 2 passes the roller 311. At this point, the cam section 2 no longer exerts a force on the calibration section 3, and the reset section 33 returns to its initial shape without any force. Since the reset section 33 returns to its initial shape, it provides an upward restoring force for the calibration connection unit 31, so that the calibration connection unit 31 drives the calibration block 32 to an initial position, namely the position in Fig. 1, returns. That is, when the roller 311 is no longer subjected to the force of the cam section 2, the cam section 2 rotates continuously clockwise until it reaches the position in Fig. 1 turns.

[0036] Preferably, the beam calibration device further comprises a guide rail 5, wherein a sliding block is arranged on the calibration connection unit 31 so that it engages with the guide rail 5, the calibration connection unit 31 being slidably connected to the guide rail 5 by means of the sliding block. The calibration connection unit 31 is configured to move along the guide rail 5 in the vertical direction through the sliding block.

[0037] The guide rail 5 is located on one side of the calibration section 3. The sliding block (not shown in the figures) is arranged on the calibration connection unit 31 so that it engages with the guide rail 5. The calibration connection unit 31 is slidably connected to the guide rail 5 via the sliding block. Naturally, a rail identical to the guide rail 5 can also be arranged on the calibration connection unit 31, with one or more balls arranged between the guide rail 5 and the rail of the calibration connection unit 31, thus allowing the calibration connection unit 31 to be slidably connected to the guide rail 5 via the balls.The sliding connection of the calibration connection unit 31 and the guide slide rail 5 can be achieved in various ways, as long as it can ensure that the calibration connection unit 31 moves along the guide slide rail 5 in the vertical direction through the sliding block, which is not described redundantly here.

[0038] As in the Fig. 3, Fig. 4 to Fig. As shown in Figure 5, the cam section 2 preferably includes at least one lower cam 21, each lower cam 21 comprising a base circular section 211 and a base block 213. The base block 213 is located on the base circular section 211. The front end of the base block 213 has an inclined structure, as does the rear end of the base block 213. The base block 213 is configured to press the calibration connection unit 31 downwards.

[0039] Preferably, each lower cam 21 further comprises at least one additional block 212, wherein the additional block 212 is arranged on the base circular section 211 and is located behind the base block 213. The front end of the additional block 212 has an inverted inclination structure to match the inclination structure of the rear end of the base block 213, while the rear end of the additional block 212 has an inclination structure. The additional block 212 is also configured to press the calibration connection unit 31 downwards.

[0040] The base block 213 is arranged on each lower cam 21, with the base block 213 being located in front of the auxiliary block 212, i.e., the base block 213 is in contact with the roller 311 before the auxiliary block 212. The front end of the base block 213 has an inclined structure to create a buffer when the base block 213 is in contact with the roller 311. It is conceivable that if the front end of the base block 213 is at a right angle, even when the base block is in contact with the roller 311, the roller 311 might not be able to "roll" from a vertical side of the base block 213 to the surface of the base block 213. Since both ends of the base block 213 are configured as the inclination structures, the situation in which the roller 311 cannot “roll” to the surface of the base block 213 can be avoided, creating a buffer to allow the roller 311 to “roll” to the surface of the base block 213.Since the rear ends of the base block 213 and the additional block 212 are configured as the inclination structures, a buffer force can be provided for the roller 311 so that it leaves the lower cam 21 when the lower cam 21 is provided with only one base block 213 or when several additional blocks 212 are arranged behind the base block 213.

[0041] Each lower cam 21 contains a base circular segment 211 and a base block 213, wherein the base block 213 is located on the base circular segment 211, i.e., the base block 213 is fixedly arranged on the base circular segment 211. However, the number of additional blocks 212 arranged on the base circular segment 211 is variable; that is, the number of additional blocks 212 can be increased or decreased according to the actual conditions.

[0042] Preferably the beam calibration device further comprises a drive shaft 6, wherein the base circular section 211 is arranged on the drive shaft 6, so that the lower cam 21 is arranged on the drive shaft 6.

[0043] It should be stated that the cam section 2 is arranged on the drive section 1, and the drive section 1 drives the cam section 2, causing it to rotate about the axis of the drive shaft 6. The beam area is located below the shielding section 4. The beams are emitted by the radiation source. The area through which the beams pass is the beam area. The beam direction is perpendicular to the shielding section 4, with respect to Fig. 1 and Fig. 2. The beams are emitted perpendicularly from the interior of the paper surface to the exterior of the paper surface. The shielding section 4 is designed to shield the calibration section 3 and also serves as a mounting frame for the beam calibration device, enabling the attachment of various parts within the beam calibration device.

[0044] Preferably, if there are several lower cams 21, the several lower cams 21 are arranged sequentially on the drive shaft 6. Regarding the Fig. 3, Fig. 4 to Fig. 5. The cam section 2 contains at least one lower cam 21, the number of lower cams 21 being adjustable according to the actual requirements. As in Fig. As shown in Figure 3, 10 lower cams 21 are arranged side by side on the drive shaft 6, the drive shaft 6 passing through the “hole” in the middle of the base circle section 211 of each lower cam 21 in order to arrange the multiple lower cams 21 sequentially together.

[0045] The number of additional blocks (212) is related to the number of lower cams (21). Ten lower cams (21) are used as an example. Fig. Starting from the left side of the figure, the lower cams 21 are sequentially numbered and marked as the first lower cam, the second lower cam, ..., the tenth lower cam. The beam calibration device of this embodiment calibrates the beams in layer-by-layer superposition mode. Therefore, the calibration blocks that enter the beam area first should be kept within the beam area until the last calibration block enters the beam area. Specifically, the number of additional blocks on the first lower cam is equal to the total number of lower cams minus 1. At least 9 additional blocks should be arranged on the first lower cam to guarantee that when the calibration block corresponding to the tenth lower cam enters the beam area, the calibration block corresponding to the first lower cam is still within the beam area.Similarly, at least 8 additional blocks should be arranged on the second lower cam to guarantee that if the calibration block corresponding to the tenth lower cam enters the radiation area, the calibration block corresponding to the second lower cam is still within the radiation area, and so on. At least the base block 213 and no additional block 212 are arranged on the tenth lower cam. The number of additional block(s) 212 that must be arranged on each lower cam can be obtained according to the rule above, which is not described redundantly here. Fig. 3 Several additional blocks 212 have passed close to the base blocks 213 of the first lower cam to the sixth lower cam at the corresponding calibration blocks, namely in the state in which the calibration blocks are held within the beam area, while the base blocks 213 of the seventh lower cam to the tenth lower cam do not reach the upper ends of the base circle segments 212, consequently the heights of the seventh lower cam to the tenth lower cam are less than those of the first lower cam to the sixth lower cam.

[0046] If there are 10 lower cams, but not all of the 10 lower cams need to be used in actual operation, two solutions are of course available: one is to remove the unnecessary lower cams from the drive section 6; while the other is not to remove the unnecessary lower cams from the drive section 6, namely to retain all 10 lower cams, with the base blocks 213 and the necessary number of additional blocks 212 arranged only on the lower cams that need to be used, the number of additional blocks 212 being obtained according to the rule above, which is not described redundantly here.

[0047] The reason for such a configuration is that, because the lower cam 21 and the additional blocks 212 on the lower cam 21 can be enlarged and reduced in size, the flexibility of use is improved.

[0048] Preferably, the structures of the base blocks 213 of the lower cams 21 are completely identical, and the structures of the additional blocks 212 of the lower cams 21 are completely identical. The structure here includes the shape, size, and other parameters. The reason for such a configuration is that, on the one hand, to guarantee that the heights of the sections of the calibration blocks 32 entering the beam area, corresponding to each lower cam 21, remain unchanged, the thicknesses of the additional blocks 212 on the same lower cam 21 should be completely identical, as shown in Fig. 5 is shown; and on the other hand, the types of parts to be added are simplified, i.e., that the base blocks 213 are completely identical on all lower cams 21 and the additional blocks 212 are completely identical on all lower cams 21, so that only three types of parts need to be manufactured in use, namely completely identical base blocks 213, completely identical additional blocks 212 and a base circular section 211.

[0049] Preferably, there is at least one calibration section 3, wherein each calibration section 3 corresponds to a lower cam 21. The number of calibration sections 3 should be exactly equal to the number of lower cams 21; that is, if there are 10 lower cams 21 in the embodiment, there should be 10 calibration sections 3 corresponding to the 10 lower cams 21.

[0050] As mentioned above, if not all of the 10 lower cams 21 need to be used in actual operation, no base block 213 or additional block 212 is arranged on the lower cams 21 that do not need to be used, whereby in this way the roller 311 of the calibration section 3 is not pressed downwards and consequently the calibration block 32 of the calibration section 3 is not pressed into the beam area, since the lower cam 21 is not provided with the base block 213 or the additional block 212.

[0051] Preferably, the drive section 1 comprises a motor 11, a drive sprocket 12, a driven sprocket 14, and a drive chain 13, the drive chain running on the drive sprocket 12 and the driven sprocket 14. The motor 11 is configured to drive the drive sprocket 12 so that it rotates and, through the drive chain 13, drives the driven sprocket 14 so that it rotates, causing the drive shaft 6 to rotate.

[0052] The motor 11 drives the drive sprocket 12, causing it to rotate, and in turn drives the driven sprocket 14 through the drive chain 13, causing it to rotate. Since the driven sprocket 14 is located on the drive shaft 6, its rotation can drive the drive shaft 6, causing it to rotate in order to drive the cam section 2, which in turn rotates to exert force on the calibration section 3.

[0053] The reason for such a configuration is that, since this drive mode, which is similar to the chainring of a bicycle, is used, the arrangement of a lead screw device in the beam calibration device can be eliminated, thus efficiently reducing the space occupancy area and making the structure of the beam calibration device more compact.

[0054] The beam calibration device in this embodiment comprises the drive section 1, the cam section 2, and the calibration section 3. The drive section 1 is configured to drive the cam section 2, causing it to rotate, while the cam section 2 is designed to exert force on the calibration section 3, enabling it to move downwards into the beam area. No leadscrew is required to provide the driving force, thus eliminating the need for a press block to move back and forth and consequently improving calibration efficiency. Furthermore, since the leadscrew is linear and therefore unnecessary, the structure of the beam calibration device can be more compact, reducing its footprint.Meanwhile, the structures of the base blocks 213 on the lower cams 21 are completely identical, as are the structures of the additional blocks 212. This not only guarantees that the heights of the sections within the beam area of ​​the calibration blocks 32 corresponding to each lower cam 21 remain unchanged, but also simplifies the types of parts to be added. The base blocks 213 on all lower cams 21 are completely identical, and the additional blocks 212 on all lower cams 21 are completely identical, thus requiring the manufacture of only three types of parts: the completely identical base blocks 213, the completely identical additional blocks 212, and a base circular section 211. The second embodiment

[0055] In Fig. 6 In embodiment 6, a radiation imaging system is created comprising a radiation source 200 and a beam calibration device 100, wherein the beam calibration device 100 is the beam calibration device in the first embodiment; and the radiation source 200 is designed to emit rays to the calibration section 3 when the calibration section 3 enters the radiation area.

[0056] The radiation imaging system in this embodiment comprises the radiation source and the beam calibration device. The beam calibration device includes the drive section, the cam section, and the calibration section. The drive section is configured to drive the cam section so that it rotates, while the cam section is designed to exert force on the calibration section, enabling the calibration section to move downward into the beam area. No leadscrew is required to provide a drive force, and consequently, a press block does not need to move back and forth, thus improving calibration efficiency.Since the lead screw is linear and no lead screw is required, the structure of the beam calibration device can be more compact, resulting in a more compact overall structure of the radiation imaging system and a reduced footprint. Furthermore, the structures of the base plate 213 and the lower cams 21 are identical, as are the structures of the additional blocks 212. This not only ensures that the heights of the sections of the calibration blocks 32 entering the beam area, corresponding to each lower cam 21, remain unchanged, but also simplifies the types of components required.The base blocks 213 on all lower cams 21 are completely identical and the additional blocks 212 on all lower cams 21 are completely identical, whereby only three types of parts need to be manufactured in use, namely the completely identical base blocks 213, the completely identical additional blocks 212 and a base circular section 211. The third embodiment

[0057] In Fig. 7 In embodiment 100, a working method of a beam calibration device is provided, wherein the beam calibration device 100 comprises a drive section 1, a cam section 2 and a calibration section 3, wherein the calibration section 3 is located below the cam section 2, and wherein the working method comprises: Step 101, the drive section 1 drives the cam section 2, causing it to rotate.

[0058] Specifically, the motor 11 drives the drive sprocket 12 so that it rotates and drives the driven sprocket 14 through the drive chain 13 so that it rotates, wherein, since the driven sprocket 14 is located on the drive shaft 6, the rotation of the driven sprocket 14 can cause the drive shaft 6 to rotate in order to drive the cam section 2 so that it rotates.

[0059] Step 102, the cam section 2 exerts a force on the calibration section 3 to enable the calibration section 3 to move downwards into a beam area.

[0060] Step 103, the reset section 33 provides an upward restoring force for the calibration connection unit 31, so that the calibration connection unit 31 drives the calibration block 32 so that it returns to an initial position.

[0061] Specifically regarding the Fig. 1 and Fig. 2. The entire operating procedure can be understood as follows: When the beam calibration device is operating, the cam section 2 rotates from the position in accordance with the drive of the drive section 1. Fig. 1 to the position in Fig. 2. At this point, the cam section 2 is in contact with the roller 311, exerting a force on it to cause the calibration section 3 to move downwards, with the calibration block 32 moving downwards, so that a section (i.e., the area located under the shielding section 4 in Fig. 2 is exposed) of the calibration block 32 enters the beam area, the beams then penetrating the section of the calibration block 32 entering the beam area. At this point, the reset section 3 deforms, being compressed. The drive section 1 rotates continuously to drive the cam section 2, so that it rotates until the rear end of the cam section 2 passes the roller 311. At this point, the cam section 2 no longer exerts force on the calibration section 3, and the reset section 33 returns to its initial shape without force. When the reset section 33 returns to its initial shape, it provides the upward restoring force for the calibration linkage unit 31, so that the calibration linkage unit 31 drives the calibration block 32 to its initial position, namely the position in Fig. 1, returns, with the current calibration complete.

[0062] The working method of the beam calibration device created by the embodiment can be applied to the calibration work of the beam calibration device in the first embodiment, whereby for a detailed description reference can be made to the first embodiment, which is not described redundantly here.

[0063] According to the operating method of the beam calibration device created by the embodiment, the drive section 1 drives the cam section 2, causing it to rotate. The cam section 2 then exerts a force on the calibration section 3, enabling the calibration section 3 to move downwards into the beam area. After the force is released, the reset section 33 provides the upward restoring force for the calibration connection unit 31, causing the calibration connection unit 31 to drive the calibration block 32 back to its initial position. In this method, no leadscrew is required to provide a drive force, and consequently, a press block does not need to move back and forth, thus improving calibration efficiency.The cam section 2 is controlled only by the drive section 1, causing it to rotate; therefore, the operating procedure is simpler and more reliable, and operating costs are low. The fourth embodiment

[0064] In Fig. 8 In embodiment 8, a working method of a radiation imaging system is provided, wherein the radiation imaging system comprises a radiation source 200 and a beam calibration device 100; and the beam calibration device 100 comprises a drive section 1, a cam section 2 and a calibration section 3, wherein the calibration section 3 is located below the cam section 2, wherein the working method comprises: Step 201, the drive section 1 drives the cam section 2, causing it to rotate. Step 202, the cam section 2 exerts a force on the calibration section 3 to enable the calibration section 3 to move downwards into a beam area. Step 203, the radiation source 200 emits radiation to the calibration section 3 when the calibration section 3 enters the radiation area.

[0065] Regarding the specific procedures of the above steps, reference can be made to the third embodiment, which is not described in detail here.

[0066] Step 204, the parameters of the radiation imaging system are monitored by the rays passing through calibration section 3.

[0067] After passing through calibration section 3, the rays generate an image in the radiation imaging system. The parameters of the radiation imaging system can be monitored according to the image definition; for example, if the image is unclear, a thinner calibration section 3 or similar can be selected, and adjustments can be made according to the actual conditions.

[0068] The working method of the radiation imaging system created by the embodiment can be used for the calibration work of the radiation imaging system in the second embodiment, whereby reference can be made to the second embodiment for a detailed description, which is not described redundantly here.

[0069] According to the working method of the radiation imaging system created by the embodiment, the parameters of the radiation imaging system can be monitored by the rays penetrating the calibration section 3, making the operating procedure simpler and more reliable and reducing operating costs.

[0070] It can be recognized that the above embodiments are merely exemplary embodiments designed to illustrate the principle of the present disclosure, but the present disclosure is not limited to them. The average person skilled in the art can make various modifications and improvements without departing from the inventive concept and essence of the present disclosure, and these modifications and improvements are intended to fall within the scope of protection of the present invention.

Claims

[1] Beam calibration device comprising a drive section (1), a cam section (2), a roller (311) and a calibration section (3), wherein the calibration section (3) is located below the cam section (2); the drive section (1) is designed to drive the cam section (2) so that it rotates; and the cam section (2) is designed to exert a force on the calibration section (3) to enable the calibration section (3) to move downwards into a jet area, the cam section (2) being in contact with the roller (311) and exerting a force on it to drive the calibration section (3). [2] Beam calibration device according to claim 1, wherein the calibration section (3) comprises a calibration connection unit (31) and a calibration block (32) and the calibration block (32) is arranged below the calibration connection unit (31) and is rigidly connected to the calibration connection unit (31); the cam section (2) is designed to exert force on the calibration connection unit (31) to enable the calibration connection unit (31) to move downwards; and the calibration connection unit (31) is designed to drive the calibration block (32) so that it moves downwards into the beam area. [3] Beam calibration device according to claim 2, wherein the calibration section (3) further comprises a reset section (33) and the reset section (33) is located below the calibration connection unit (31) and is connected to the calibration connection unit (31); and the reset section (33) is designed to provide an upward restoring force for the calibration connection unit (31) so that the calibration connection unit (31) drives the calibration block (32) to return it to an initial position. [4] Beam calibration device according to claim 3, wherein the beam calibration device further comprises a shielding section (4), the reset section (33) comprises a reset spring, one end of the reset spring is connected to the calibration connection unit (31) and the other end of the reset spring is connected to the shielding section (4). [5] Beam calibration device according to claim 2, which further comprises a guide slide rail (5), wherein a sliding block is arranged on the calibration connection unit (31) so that it engages with the guide slide rail (5), and the calibration connection unit (31) is slidably connected to the guide slide rail (5) by means of the sliding block; and the calibration connection unit (31) moves along the guide slide rail (5) in the vertical direction through the sliding block. [6] Beam calibration device according to claim 2, wherein the roller (311) is arranged on the calibration connection unit (31); and the roller (311) is designed to rotate when the cam section (2) exerts force on the calibration connection unit (31) in order to reduce the frictional force between the calibration connection unit (31) and the cam section (2). [7] Beam calibration device according to claim 2, wherein the cam section (2) comprises at least one lower cam (21), each lower cam (21) comprises a base circle section (211) and a base block (213), the base block (213) is located on the base circle section (211), a front end of the base block (213) has an inclination structure and a rear end of the base block (213) has an inclination structure; and the base block (213) is designed to press the calibration connection unit (31) downwards. [8] Beam calibration device according to claim 7, wherein each lower cam (21) further comprises at least one additional block (212), the additional block (21) being arranged on the base circle section (211) and being located behind the base block (213), the front end of the additional block (212) having an inverted inclination structure to match the inclination structure of the rear end of the base block (213), and the rear end of the additional block (212) having an inclination structure. [9] Beam calibration device according to claim 7, wherein the structures of the base blocks (213) of the lower cams (21) are completely identical. [10] Beam calibration device according to claim 8, wherein the structures of the additional blocks (212) of the lower cams (21) are completely identical. [11] Beam calibration device according to claim 1, wherein the cam section (2) comprises at least one lower cam (21), there is at least one calibration section (3) and each calibration section (3) corresponds to a lower cam (21). [12] Beam calibration device according to claim 8, wherein the cam section (2) comprises several lower cams (21), wherein the number of additional blocks (212) of the several lower cams (21) are different. [13] Beam calibration device according to claim 7, which further comprises a drive shaft (6) wherein the base circular section (211) is arranged on the drive shaft (6) so that the lower cam (21) is arranged on the drive shaft (6). [14] Beam calibration device according to claim 13, wherein the drive section (1) comprises a motor (11), a drive sprocket (12), a driven sprocket (14) and a drive chain (13), wherein the drive chain (13) runs around the drive sprocket (12) and the driven sprocket (14) and the driven sprocket (14) is arranged on the drive shaft (6); and the motor (11) is designed to drive the drive sprocket (12) so that it rotates and drives the driven sprocket (14) through the drive chain (13) so that it rotates to cause the drive shaft (6) to rotate. [15] Radiation imaging system comprising a radiation source and a beam calibration device, wherein the beam calibration device is the beam calibration device according to claim 1; and the radiation source is designed to emit rays to the calibration section (3) when the calibration section (3) enters the radiation area. [16] Working method of a jet calibration device, wherein the jet calibration device comprises a drive section (1), a cam section (2), a roller (311) and a calibration section (3), wherein the calibration section (3) is located below the cam section (2), wherein the working method comprises: Drive, through the drive section (1), of the cam section (2), so that it rotates; and exerting, through the cam section (2), a force on the calibration section (3) to enable the calibration section (3) to move downwards into a beam area, the cam section (2) being in contact with the roller (311) and exerting a force on it to drive the calibration section (3). [17] Working method of the beam calibration device according to claim 16, further comprising: Providing, by means of a reset section (33), an upward restoring force for a calibration connection unit (31) of the calibration section (33), so that the calibration connection unit (31) drives the calibration block (32) so that it returns to an initial position. [18] Working method of a radiation imaging system, wherein the radiation imaging system comprises a radiation source and a beam calibration device, the beam calibration device comprising a drive section (1), a cam section (2), a roller (311) and a calibration section (3), the calibration section (3) being located below the cam section (2), the working method comprising: Drive, through the drive section (1), of the cam section (2), so that it rotates; exert, through the cam section (2), a force on the calibration section (3) to enable the calibration section (3) to move downwards into a beam area, the cam section (2) being in contact with the roller (311) and exerting a force on it to drive the calibration section (3); Emitting, through the radiation source, of rays to the calibration section (3) when the calibration section (3) enters the radiation area; and Monitoring the parameters of the radiation imaging system by the rays passing through the calibration section (3).

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