Cyclotron, superconducting coil adjustment unit, adjustment device and debugging method

Abstract

The present invention discloses a cyclotron, radiotherapy equipment, a superconducting coil adjustment unit, an adjustment device, and a debugging method, wherein the superconducting coil adjustment unit includes a rotating shaft, a drive assembly, a transmission assembly, and a detection element; the rotating shaft is used to rotate under the drive of the drive unit; the drive assembly includes an actuator and a tension assembly, the actuator is used to drive the tension assembly to move linearly by rotation, one end of the tension assembly is connected to the superconducting coil and drives the superconducting coil to move; the transmission assembly is connected to the rotating shaft and the actuator respectively, and transmits the power generated by the rotating shaft to the actuator; the detection element is connected to the actuator and detects the rotation angle of the actuator to monitor the displacement of the tension assembly and the superconducting coil. The cyclotron, radiotherapy equipment, superconducting coil adjustment unit, adjustment device, and debugging method of the present invention are used to adjust the position of the superconducting coil so that the superconducting coil can be adjusted to a desired position.

Description

Technical Field

[0001] The present invention relates to the technical field of proton therapy equipment, and in particular to a cyclotron, a superconducting coil adjustment unit, an adjustment device and a debugging method. Background Art

[0002] In small, integrated proton therapy devices, a cyclotron is typically used to deliver a proton beam to the patient's lesion site for treatment. To deliver the proton beam at various angles, existing cyclotrons must be driven by an arm that rotates back and forth within a certain range of angles.

[0003] Since the superconducting coils in a cyclotron are generally in a suspended state to reduce the impact of heat transfer on the working state of the superconducting coils, the superconducting coils may be offset during the rotation of the cyclotron, resulting in the central axis of the magnetic field generated by the superconducting coils being non-concentric with the physical central axis of the cyclotron. At this time, the proton beam may also be offset when accelerating in the cyclotron, resulting in the proton beam being unable to be emitted from the beam outlet of the cyclotron, or only part of the proton beam being emitted from the beam outlet of the cyclotron, resulting in the beam current of the proton beam drawn out from the cyclotron being unable to meet the demand. Summary of the Invention

[0004] The object of the present invention is to provide a cyclotron, a radiotherapy device, a superconducting coil adjustment unit, an adjustment device and a debugging method for adjusting the position of the superconducting coil so that the superconducting coil can be adjusted to a desired position.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A superconducting coil adjustment unit, comprising:

[0007] a rotating shaft, configured to be connected to an external driving unit and capable of rotating under the drive of the driving unit;

[0008] A driving assembly, comprising an actuator and a tension assembly connected to each other, wherein the actuator is used to drive the tension assembly to move linearly by rotation, and one end of the tension assembly is used to be connected to the superconducting coil and can drive the superconducting coil to move;

[0009] a transmission assembly, connected to the rotating shaft and the actuator respectively, and used to transmit power generated by the rotating shaft to the actuator to drive at least a portion of the actuator to rotate;

[0010] A detection element is connected to the actuator and detects a rotation angle of the actuator to monitor the displacement of the tension assembly and the superconducting coil.

[0011] Preferably, the transmission assembly includes a driving gear sleeved on the rotating shaft and a driven gear fixedly connected to the actuator, wherein the driving gear meshes with the driven gear to transmit the power of the rotating shaft to the actuator;

[0012] And / or, the actuator is a differential screw, and an inner wheel of the differential screw is lower than an outer wheel of the differential screw along a height direction of the superconducting coil adjustment unit.

[0013] Preferably, the tension assembly is connected to a pressure detection member, and the pressure detection member is used to detect the force applied by the tension assembly to the superconducting coil;

[0014] And / or, the detection element is a potentiometer.

[0015] Preferably, the device further comprises a limit member and a housing, wherein the limit member is connected to the tension assembly, a limit space for accommodating the limit member is formed in the housing, and a wall forming the limit space is at least partially overlapped with the limit member along the moving direction of the tension assembly, so that the wall forming the limit space limits the moving range of the limit member;

[0016] And / or, a protrusion capable of extending into the limiting space is provided in the shell, and the protrusion is provided at one end of the tension assembly facing the superconducting coil to limit the movement range of the tension assembly.

[0017] Preferably, the tension component is provided with a connecting portion and a fixing piece at one end thereof for connection with the superconducting coil, the connecting portion comprising a connecting cavity and a fixing hole communicating with the connecting cavity, the connecting cavity being used to accommodate an adjustment component connected to the superconducting coil, the fixing piece passing through the connecting cavity through the fixing hole and fixing the adjustment component.

[0018] A superconducting coil adjustment device, comprising:

[0019] A superconducting coil adjustment unit according to any one of the above;

[0020] a driving unit connected to the rotating shaft of the superconducting coil adjusting unit and configured to drive the rotating shaft to rotate;

[0021] An adjusting component has one end for connecting with the superconducting coil and the other end for connecting with the tension component of the superconducting coil adjusting unit, and the tension component drives the superconducting coil to move through the adjusting component.

[0022] Preferably, a control unit is further included, which is connected to the detection element and the driving unit respectively to receive detection information from the detection element and control the operation of the driving unit.

[0023] Preferably, the tension component is provided with a connecting portion and a fixing member at one end thereof for connecting to the superconducting coil; the adjustment component comprises a tension rod, and a first fitting member and a second fitting member distributed at opposite ends of the tension rod, the first fitting member being used to connect to the superconducting coil, the second fitting member being used to connect to the connecting portion of the tension component, and being fixed relative to the tension component via the fixing member.

[0024] A cyclotron comprising:

[0025] At least one superconducting coil adjustment device according to any one of the above;

[0026] superconducting coils;

[0027] The mounting bracket is provided with an installation space for accommodating the superconducting coil, and the mounting bracket includes at least one matching portion for cooperating with the superconducting coil device. The superconducting coil adjustment device adjusts the position of the mounting bracket and the superconducting coil installed in the mounting bracket through the matching portion.

[0028] Preferably, at least one pair of superconducting coil adjusting devices is provided, and the pair of superconducting coil adjusting devices is distributed at opposite ends of the superconducting coil, and the pair of superconducting coil adjusting devices is used to adjust the position of the superconducting coil along an axis.

[0029] Preferably, it further comprises a plurality of magnetic field detection elements, wherein the plurality of magnetic field detection elements are spaced apart to measure the magnetic field strength at a plurality of positions in the cyclotron;

[0030] Alternatively, it further includes a magnetic field detection device, which includes a detection end and a driving component, wherein the detection end is used to detect the magnetic field strength at the location of the detection end, and the driving component is used to drive the detection end to move to measure the magnetic field strength at multiple locations in the cyclotron.

[0031] A superconducting coil debugging method is applied to any of the above-mentioned cyclotron accelerators, and the superconducting coil debugging method comprises:

[0032] Obtaining an offset of the superconducting coil, and obtaining an adjustment amount required by each superconducting coil adjustment device through the offset of the superconducting coil;

[0033] Each of the superconducting coil adjustment devices controls the operation of the driving unit according to the required adjustment amount, so as to drive the superconducting coil to be adjusted to a specified position.

[0034] Preferably, it also includes:

[0035] The rotation angle of the actuator driven by the driving unit is monitored by a detection element to obtain the actual adjustment amount of the superconducting coil adjustment device. When the actual adjustment amount of the superconducting coil adjustment device is the same as the adjustment amount required by the superconducting coil adjustment device, the driving unit stops operating.

[0036] A radiotherapy device comprises any one of the above-mentioned cyclotrons.

[0037] Compared with the prior art, the beneficial effects of the present invention include at least:

[0038] By connecting the tension assembly of the driving assembly to the superconducting coil to drive the superconducting coil to move, the position of the superconducting coil can be adjusted. Therefore, when the superconducting coil is offset, the superconducting coil adjustment unit of the present invention can be used to adjust the position of the superconducting coil so that the superconducting coil can be adjusted to the desired position; and by using a detection element to detect the displacement of the tension assembly and the superconducting coil, the adjustment accuracy of the superconducting coil by the superconducting coil adjustment unit can be ensured, thereby ensuring that the beam drawn out from the cyclotron meets the requirements, providing a reliable guarantee for achieving accurate radiotherapy effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a structural schematic diagram of a superconducting coil adjustment unit according to an embodiment of the present invention;

[0040] Figure 2 is a cross-sectional view of a superconducting coil adjustment unit according to an embodiment of the present invention;

[0041] Figure 3 is a partial structural diagram of a superconducting coil adjustment unit according to an embodiment of the present invention;

[0042] Figure 4 is a schematic structural diagram of a superconducting coil adjustment device according to an embodiment of the present invention;

[0043] Figure 5 It is a partial structural diagram of a superconducting coil adjustment device according to an embodiment of the present invention.

[0044] In the figure: 100, superconducting coil adjustment unit; 1, rotating shaft; 11, notch; 2, driving assembly; 21, actuator; 211, adjustment hole; 22, tension assembly; 221, connecting part; 2211, connecting cavity; 2212, fixing hole; 222, fixing piece; 223, tension cup; 224, pull rod; 2241, first section of rod body; 2242, second section of rod body; 225, hexagonal sealing plate; 3, transmission assembly; 31, driving gear; 32, driven gear; 4, detection element; 5, pressure detection piece; 6, limit piece; 7, shell; 71, limit space; 72, boss; 200, driving unit; 201, motor; 202, transmission rod; 300, adjustment assembly; 301, tension rod; 302, first matching piece; 303, second matching piece. DETAILED DESCRIPTION

[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the drawings represent identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0046] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but can be modified as needed, and all such modifications are within the scope of protection of the present invention.

[0047] like Figure 1 and Figure 2 As shown, the present invention provides a superconducting coil adjustment unit 100, including a shell 7, a rotating shaft 1 that can be connected to an external driving unit 200, a driving component 2 connected to the rotating shaft 1, a transmission component 3 that is respectively connected to the driving component 2 and the rotating shaft 1 and can transmit power, and a detection element 4 for detecting the movement amount of the driving component 2.

[0048] The housing 7 can be used to house at least a portion of the rotating shaft 1, drive assembly 2, transmission assembly 3, and detection element 4. Specifically, the end of the rotating shaft 1 connected to the transmission assembly 3 is housed within the housing 7, while the end of the rotating shaft 1 connected to the drive unit 200 protrudes from the housing 7. The main body of the drive assembly 2 is housed within the housing 7, while the end of the drive assembly 2 connected to the superconducting coil protrudes from the housing 7. The detection element 4 and transmission assembly 3 can be completely housed within the housing 7, making the overall structure of the superconducting coil adjustment unit 100 more compact.

[0049] The rotating shaft 1 can be driven by the external drive unit 200 to rotate, and the rotating shaft 1 can transmit power to the drive assembly 2 via the transmission assembly 3. The end of the rotating shaft 1 for connecting to the external drive unit 200 is provided with a notch 11. The notch 11 is formed by a radial recess formed from the outer wall of the rotating shaft 1. The notch 11 can be aligned with the drive unit 200 to prevent relative rotation between the rotating shaft 1 and the drive unit 200.

[0050] Reference Figure 2 and Figure 3 The transmission assembly 3 may include a driving gear 31 and a driven gear 32 that mesh with each other. The driving gear 31 may be sleeved on the rotating shaft 1, and the driving gear 31 may rotate synchronously with the rotating shaft 1. Specifically, the driving gear 31 and the rotating shaft 1 are relatively fixed by interference fit, screw fixation, etc., so that the driving gear 31 and the rotating shaft 1 can rotate synchronously. The driven gear 32 can rotate under the drive of the driving gear 31, and the driven gear 32 is fixedly connected to the driving assembly 2, so that the driven gear 32 can drive at least a part of the driving assembly 2 to rotate synchronously. Among them, the diameter of the driven gear 32 is larger than that of the driving gear 31. According to the gear ratio of the driven gear 32 and the driving gear 31, the transmission ratio of the transmission assembly 3 can be obtained, and then the rotation angle ratio of the rotating shaft 1 and at least a part of the driving assembly 2 can be obtained.

[0051] Reference Figure 2 The drive assembly 2 may include an actuator 21 and a tension assembly 22 that are connected to each other. The actuator 21 is fixedly connected to the driven gear 32, for example, the actuator 21 and the driven gear 32 are fixedly connected by fasteners such as screws. The actuator 21 rotates together with the driven gear 32 under the drive of the driven gear 32, and the actuator 21 can convert the rotation into linear motion. The tension assembly 22 is connected to the actuator 21, and when the actuator 21 converts the rotation into linear motion, it can drive the tension assembly 22 connected to the actuator 21 to move linearly. One end of the tension assembly 22 can be directly or indirectly connected to the superconducting coil to drive the superconducting coil to move, thereby adjusting the position of the superconducting coil. Among them, the actuator 21 can be a differential screw, the outer wheel of the differential screw is connected to the driven gear 32 to rotate synchronously with the driven gear 32, and the inner wheel of the differential screw is threaded with the outer wheel to convert the rotation of the outer wheel into the linear motion of the inner wheel; the tension assembly 22 is connected to the inner wheel of the differential screw so that the actuator 21 can drive the tension assembly 22 to move linearly.

[0052] In some specific embodiments, to increase the adjustment range of the superconducting coils by the drive assembly 2, when the actuator 21 is a differential screw, the inner wheel of the differential screw is positioned lower than the outer wheel of the differential screw along the height direction of the superconducting coil adjustment unit 100. This allows the inner wheel of the differential screw to have a greater travel range, thereby increasing the adjustment range of the superconducting coils by the drive assembly 2. To adjust the height between the inner and outer wheels of the differential screw, the inner wheel of the differential screw is provided with an adjustment hole 211 that can be engaged with a wrench. The inner wheel of the differential screw can be adjusted by inserting a wrench into the adjustment hole 211, thereby allowing the inner wheel of the differential screw to be lower than the outer wheel of the differential screw along the height direction of the superconducting coil adjustment unit 100.

[0053] In some specific embodiments, the tension assembly 22 includes a tension cup 223, a pull rod 224 and a hexagonal sealing plate 225. The pull rod 224 can be connected to the actuator 21 and the superconducting coil respectively. Specifically, the pull rod 224 can include a first section rod body 2241 and a second section rod body 2242. One end of the first section rod body 2241 is connected to the actuator 21, and the other end is connected to the hexagonal sealing plate 225; the hexagonal sealing plate 225 is connected to the tension cup 223; one end of the second section rod body 2242 is connected to the tension cup 223, and the other end is used to be directly or indirectly connected to the superconducting coil. Therefore, the driving force generated by the actuator 21 can be transmitted to the superconducting coil in sequence through the first section rod body 2241 of the pull rod 224, the hexagonal sealing plate 225, the tension cup 223, and the second section rod body 2242 of the pull rod 224, thereby adjusting the position of the superconducting coil.

[0054] Reference Figure 1In some embodiments, the tension assembly 22 can be indirectly connected to the superconducting coil. For example, the second section 2242 of the tension rod 224 in the tension assembly 22 is connected to the adjustment assembly 300 connected to the superconducting coil, so that the tension assembly 22 is connected to the superconducting coil through the adjustment assembly 300. Specifically, the end of the tension assembly 22 that connects to the superconducting coil is provided with a connecting portion 221 and a fixing member 222. Specifically, the second section 2242 of the tension rod 224 is provided with the connecting portion 221 and the fixing member 222 on the end facing the coil. The connecting portion 221 includes a connecting cavity 2211 and a fixing hole 2212 communicating with the connecting cavity 2211. The connecting cavity 2211 is used to accommodate a portion of the adjustment assembly 300. The connecting cavity 2211 can be formed as a recessed portion on the end of the connecting portion 221 facing the superconducting coil, so that the adjustment assembly 300 can be inserted into the connecting cavity 2211 from the end of the connecting portion 221 facing the superconducting coil. The fixing hole 2212 may extend radially through the connecting portion 221 of the tension assembly 22 and may communicate with the connecting cavity 2211. The fixing hole 2212 is configured to allow a fixing member 222 to pass therethrough, and at least a portion of the fixing hole 2212 may cooperate with the fixing member 222 to achieve a fixed connection between the fixing member 222 and the connecting portion 221 in which the fixing hole 2212 is formed. For example, a portion of the fixing hole 2212 may form a threaded hole, and the fixing member 222 may be a screw. The fixing member 222 may threadably cooperate with the fixing hole 2212 to secure the fixing member 222 to the connecting portion 221; alternatively, a portion of the fixing hole 2212 may form an interference fit with the fixing member 222 to secure the fixing member 222 to the connecting portion 221. When part of the structure of the adjustment component 300 is inserted into the connecting cavity 2211, the fixing member 222 can pass through the fixing hole 2212 and the adjustment component 300 and be fixedly connected to the tension component 22. At the same time, the adjustment component 300 sleeved on the fixing member 222 remains relatively fixed with the connecting portion 221, thereby making the adjustment component 300 and the tension component 22 remain relatively fixed, for example, the adjustment component 300 remains relatively fixed with the tension component 22 at least along the axial direction of the tension component 22.

[0055] In some specific embodiments, the tension assembly 22 may be connected to a pressure detection part 5. When the tension assembly 22 moves, it will apply a force to the superconducting coil to adjust the position of the superconducting coil. The pressure detection part 5 can be used to detect the force applied by the tension assembly 22 to the superconducting coil, so as to make corresponding adjustments to the superconducting coil. Specifically, the tension cup 223 and the hexagonal sealing plate 225 in the tension assembly 22 can together form an installation space for accommodating the pressure detection part 5, and the pressure detection part 5 is accommodated in the installation space surrounded by the tension cup 223 and the hexagonal sealing plate 225, and the pressure detection part 5 can be sleeved on the second section 2242 of the pull rod 224. When the tension assembly 22 applies a force to the superconducting coil, the pressure detection part 5 installed in the tension assembly 22 can detect the force applied by the tension assembly 22 to the superconducting coil.

[0056] Reference Figure 2 In some embodiments, to limit the amount of adjustment that the superconducting coil adjustment unit 100 can make on the superconducting coil and prevent the superconducting coil adjustment unit 100 from over-adjusting the position of the superconducting coil, the superconducting coil adjustment unit 100 further includes a stopper 6. The stopper 6 is fixedly connected to the tension assembly 22. For example, the stopper 6 is sleeved within the tension cup 223 in the tension assembly 22 and has an interference fit therewith. A stopper space 71 is formed within the housing 7 for accommodating the stopper 6. The stopper space 71 extends along the direction of movement of the tension assembly 22, for example, along the axial direction of the tension assembly 22. The walls forming the stopper space 71 are at least partially overlapped with the stopper 6 along the direction of movement of the tension assembly 22, so that the stopper 6 may abut against the walls forming the stopper space 71 during movement. The walls forming the stopper space 71 thereby limit the range of movement of the stopper 6 and, in turn, the range of movement of the tension assembly 22. As a preferred embodiment, the walls forming the limiting space 71 limit the two opposite ends of the limiting member 6 along the moving direction of the tension assembly 22 .

[0057] In addition, a protrusion 72 that can extend into the limiting space 71 can be further provided in the housing 7. The protrusion 72 can be provided at the end of the tension assembly 22 facing the superconducting coil, so that the protrusion 72 can limit the range of movement of the tension assembly 22 in the direction toward the superconducting coil. Specifically, the protrusion 72 is provided at the end of the tension cup 223 facing the superconducting coil, and the protrusion 72 can abut against the tension cup 223 to limit further movement of the tension cup 223 in the direction toward the superconducting coil, thereby limiting the range of movement of the tension assembly 22 in the direction toward the superconducting coil.

[0058] The detection element 4 is connected to the actuator 21 and is used to detect the rotation angle of the actuator 21. The rotation angle of the actuator 21 is positively correlated with the movement of the tension assembly 22. Based on the rotation angle of the actuator 21, the displacement of the tension assembly 22 can be calculated, and the displacement of the superconducting coil generated by the tension assembly 22 can be obtained. For example, when the actuator 21 and the tension assembly 22 are threadedly engaged to convert rotary motion into linear motion, by obtaining the corresponding thread parameters of the actuator 21 and the tension assembly 22, the displacement of the tension assembly 22 after the actuator 21 rotates a certain angle can be calculated according to existing calculation methods, and the displacement of the superconducting coil generated by the tension assembly 22 can be obtained. Among them, the detection element 4 can specifically be a potentiometer. When the drive assembly 2 moves, the detection element 4 can detect the rotation angle of the actuator 21 in real time to monitor the displacement of the tension assembly 22 and the superconducting coil in real time.

[0059] Reference Figure 4 The present invention also provides a superconducting coil adjustment device, including the above-mentioned superconducting coil adjustment unit 100, a driving unit 200 connected to the rotating shaft 1 of the superconducting coil adjustment unit 100 and used to drive the rotating shaft 1 to rotate, and an adjustment component 300 connected to the superconducting coil and the tension component 22, and may also include a control unit.

[0060] One end of the adjustment component 300 is connected to the tension component 22 so that the tension component 22 can drive the adjustment component 300 to move; the other end of the adjustment component 300 is directly or indirectly connected to the superconducting coil, and the adjustment component 300 can drive the superconducting coil to move through the power transmitted by the tension component 22, thereby adjusting the position of the superconducting coil.

[0061] Reference Figure 5In some specific embodiments, the adjustment assembly 300 may include a tension rod 301, and a first fitting 302 and a second fitting 303 distributed at opposite ends of the tension rod 301. The first fitting 302 is fixedly connected to the end of the tension rod 301 facing away from the superconducting coil, for example, the first fitting 302 is threadedly connected to the end of the tension rod 301 facing away from the superconducting coil. The first fitting 302 is also used to connect to the connecting portion 221 of the tension assembly 22. Specifically, a portion of the first fitting 302 extends into the connecting cavity 2211 of the connecting portion 221, and the portion of the first fitting 302 extending into the connecting cavity 2211 is provided with a through hole that cooperates with the fixing member 222. When the first fitting 302 extends into the connecting cavity 2211, the fixing member 222 can pass through the fixing hole 2212 of the connecting portion 221 and the through hole of the first fitting 302, and be fixedly connected to the connecting portion 221, so as to achieve relative fixation between the first fitting 302 and the connecting portion 221. The second fitting 303 is used to connect directly or indirectly to the superconducting coil. When the tension assembly 22 moves, the tension assembly 22 applies a force to the tension rod 301 through the first fitting 302. The tension rod 301 then transmits the force to the second fitting 303 to act on the superconducting coil.

[0062] The control unit is connected to the detection element 4 and the drive unit 200 respectively. The information detected by the detection element 4 can be transmitted to the control unit so that the control unit can obtain the actual displacement of the tension assembly 22 and the superconducting coil. The control unit can control the drive unit 200 according to the actual displacement of the tension assembly 22. Specifically, when the position of the superconducting coil needs to be adjusted, in order to move the superconducting coil to the specified position, it is necessary to drive the tension assembly 22 to move the required distance; at this time, the control unit controls the movement of the drive unit 200 and detects the displacement of the tension assembly 22 in real time through the detection element 4. When the displacement of the tension assembly 22 is the same as the required movement distance of the tension assembly 22, the control unit controls the drive unit 200 to stop. The drive unit 200 can specifically include a motor 201 and a transmission rod 202 connected to the motor 201. The motor 201 drives the transmission rod 202 to rotate. One end of the transmission rod 202 is sleeved on the rotating shaft 1 in the superconducting coil adjustment unit 100 to drive the rotating shaft 1 to move synchronously.

[0063] Among them, the control unit can be any applicable computing device, such as a personal computer, a server, a programmable logic controller (PLC controller), a single-chip microcomputer, a host computer, etc., or it can be an integration of computer devices. The control unit can have functions such as receiving information and sending control commands. The control unit can control each component to perform corresponding actions through wired communication or wireless communication.

[0064] The present invention also provides a cyclotron, comprising the above-mentioned superconducting coil adjustment device, a superconducting coil, and a mounting bracket (not shown) for mounting the superconducting coil, and may further comprise an iron yoke.

[0065] The mounting bracket defines a mounting space for accommodating a superconducting coil. After the superconducting coil is installed in the mounting bracket, it can be suspended within the iron yoke. The mounting bracket can be connected to a superconducting coil adjustment device, so that the superconducting coil adjustment device can adjust the position of the mounting bracket, thereby adjusting the position of the superconducting coil installed in the mounting bracket. Specifically, the mounting bracket can be a coil bobbin within a cryostat.

[0066] To facilitate the connection between the mounting bracket and the superconducting coil adjustment device, the outer wall of the mounting bracket can be provided with a matching portion that cooperates with the superconducting coil adjustment device. The superconducting coil adjustment device adjusts the position of the mounting bracket and the superconducting coil installed in the mounting bracket by applying a force to the matching portion. The matching portion is matched with the second matching piece 303 of the adjustment assembly 300 in the superconducting coil adjustment device. The matching portion can specifically include a threaded column and a nut threadedly connected to the threaded column. The second matching piece 303 can be sleeved on the nut of the matching portion. For example, the second matching piece 303 is provided with a matching cavity that cooperates with the nut. The shape of the matching cavity is the same as or similar to the shape of the nut. When the second matching piece 303 is sleeved on the nut, it can drive the nut and the second matching piece 303 to move synchronously, thereby achieving adjustment of the matching portion.

[0067] The mounting bracket may be provided with one or more mating portions, and one or more superconducting coil adjustment devices may also be provided, with each mating portion being connected to a corresponding superconducting coil adjustment device. In a preferred embodiment, the mounting bracket is provided with at least one pair of mating portions, and the superconducting coil adjustment devices are also provided with at least one pair, with the pair of mating portions being located at opposite ends of the superconducting coil, and the pair of superconducting coil adjustment devices connected to the pair of mating portions being located at opposite ends of the superconducting coil, so that the pair of superconducting coil adjustment devices can adjust the position of the superconducting coil along a single axis via the pair of mating portions.

[0068] Specifically, during the operation of the cyclotron, if the position of the superconducting coil needs to be adjusted along the X-axis, a matching portion can be provided at each of the opposite ends of the mounting bracket along the X-axis, and each matching portion is connected to a superconducting coil adjustment device. A pair of superconducting coil adjustment devices can adjust the superconducting coil along the positive or negative direction of the X-axis. During the operation of the cyclotron, if the position of the superconducting coil needs to be adjusted along the Y-axis and / or the Z-axis, a matching portion can be provided at each of the opposite ends of the mounting bracket along the Y-axis and / or the Z-axis, and each matching portion is connected to a superconducting coil adjustment device. The X-axis, Y-axis, and Z-axis can be perpendicular to each other, and the X-axis, Y-axis, and Z-axis can intersect at the physical center of the cyclotron.

[0069] In some specific embodiments, to facilitate detection of whether the position of the superconducting coil is offset, the cyclotron may be provided with multiple magnetic field detection components, which may be spaced apart at different positions of the cyclotron to detect the magnetic field strength at multiple different positions of the cyclotron. The magnetic field information detected by the multiple magnetic field detection components may be fed back to a control unit of a superconducting coil adjustment device. The control unit may determine whether the position of the superconducting coil has offset based on the magnetic field information detected by the multiple magnetic field detection components. The control unit may also determine the offset of the superconducting coil based on the magnetic field information detected by the multiple magnetic field detection components, and thereby control the operation of the corresponding superconducting coil adjustment device to adjust the position of the superconducting coil. The magnetic field detection component may specifically be a Hall sensor for detecting a magnetic field.

[0070] The control unit may pre-store the magnitude and shape of the magnetic field detected by multiple magnetic field detectors when the superconducting coil is located at a specified position (the central axis of the superconducting coil is concentric with the physical central axis of the cyclotron). Subsequently, when the cyclotron is operating, the multiple magnetic field detectors detect the magnetic field at the corresponding position, and the control unit obtains the magnitude and shape of the actual magnetic field measured by the multiple magnetic field detectors. By comparing the magnitude and shape of the actual magnetic field with the magnitude and shape of the magnetic field pre-stored by the control unit, if there is a difference, it can be determined that the superconducting coil has been offset; if the magnitude and shape of the actual magnetic field is the same as the magnitude and shape of the magnetic field pre-stored by the control unit, it can be determined that the superconducting coil is located at the specified position. Furthermore, based on the amount of change between the magnitude and shape of the actual magnetic field and the magnitude and shape of the magnetic field pre-stored by the control unit, the specific or approximate offset of the superconducting coil can be determined, for example, including the offset of the superconducting coil along the X, Y, and Z axes. The position of the superconducting coil can then be adjusted by adjusting the superconducting coil adjustment device located in the corresponding axial direction.

[0071] In other specific embodiments, a cyclotron may also be provided with a magnetic field detection device to detect magnetic field strength at multiple locations within the cyclotron. The magnetic field detection device includes a detection terminal and a drive component. The detection terminal is configured to detect the magnetic field strength at the location of the detection terminal. The drive component is configured to drive the detection terminal to move to multiple locations within the cyclotron, thereby measuring the magnetic field strength at multiple locations within the cyclotron. The detection terminal may be a Hall effect sensor for detecting magnetic fields.

[0072] The present invention also provides a superconducting coil debugging method, which can be applied to the above-mentioned cyclotron accelerator. The superconducting coil debugging method includes the following steps S01 and S02, and may further include step S03.

[0073] Step S01: obtaining the offset of the superconducting coil, and obtaining the adjustment amount required by each superconducting coil adjustment device through the offset of the superconducting coil.

[0074] Step S02: Each superconducting coil adjustment device controls the driving unit 200 to operate according to the required adjustment amount, so as to drive the superconducting coil to be adjusted to a specified position.

[0075] Step S03: Monitor the rotation angle of the actuator 21 driven by the drive unit 200 through the detection element 4 to obtain the actual adjustment amount of the superconducting coil adjustment device. When the actual adjustment amount of the superconducting coil adjustment device is the same as the adjustment amount required by the superconducting coil adjustment device, the drive unit 200 stops operating.

[0076] In step S01, the offset of the superconducting coil can be determined based on magnetic field information detected by multiple magnetic field detection components or magnetic field detection devices provided in the cyclotron. The offset of the superconducting coil can be directly obtained as an accurate value to indicate the adjustment amount of the superconducting coil by the superconducting coil adjustment device; alternatively, the offset of the superconducting coil can be obtained within an approximate range to instruct the superconducting coil adjustment device to make preliminary adjustments to the superconducting coil. Thereafter, the offset between the superconducting coil and the predetermined position can be determined in real time based on the magnetic field information detected by the multiple magnetic field detection components or magnetic field detection devices. The real-time offset of the superconducting coil can be obtained based on the change in the position of the superconducting coil, and the superconducting coil adjustment device can be instructed to adjust the superconducting coil in real time.

[0077] In step S02, the amount of adjustment made by the superconducting coil adjustment device on the superconducting coil is positively correlated with the travel distance of the tension assembly 22 of the drive assembly 2. Based on the required adjustment of the superconducting coil by the superconducting coil adjustment device, the required travel distance of the tension assembly 22 and, consequently, the required rotation angle of the actuator 21 can be determined. The actuator 21 is driven by the drive unit 200 to rotate the required rotation angle, thereby adjusting the superconducting coil to the specified position.

[0078] Step S03 can be performed simultaneously with step S02. The detection element 4 is used to detect the real-time rotation angle of the actuator 21. When the real-time rotation angle of the actuator 21 is equal to the required rotation angle of the actuator 21, and the actual adjustment amount of the superconducting coil adjustment device is the same as the required adjustment amount of the superconducting coil adjustment device, the drive unit 200 stops operating.

[0079] The present invention also provides a radiotherapy device, comprising a treatment gantry (not shown), a particle accelerator (not shown) for generating a particle beam, a scanning magnet (not shown), an ionization chamber (not shown), and a range adjuster (not shown). The treatment gantry includes an arm, and the particle accelerator can be the cyclotron accelerator described above. The radiotherapy device can be configured without a beam transmission line, with the particle accelerator mounted on the treatment gantry and capable of rotating with the treatment gantry. The treatment gantry can also be referred to as a rotating gantry. In some possible embodiments, the radiotherapy device is a proton therapy device, the particle accelerator can be a proton accelerator, the particle beam can be a proton beam, and the flowing particle beam is simply referred to as a particle beam. A particle beam transmission system is used to transmit the particle beam from the accelerator into the patient's body. The particle beam transmission system uses magnetic field control to accurately transmit the particle beam to the treatment location, ensuring accurate positioning and transmission of the particle beam. The particle beam transmission system can include components that the particle beam passes through during transmission, such as a scanning magnet, an ionization chamber, and an adaptive aperture. The scanning magnet allows the particle beam to move in the X direction and / or Y direction by appropriately changing the magnetic field, with the X direction and the Y direction being perpendicular to each other. The ionization chamber can be used to measure the dose size and / or position of the beam. The adaptive grating can also form an adaptive aperture that can be adaptively adjusted according to the shape and size of the target area so that the shape and size of the particle beam can match the morphology of the tumor. The advantage of this adaptive irradiation is that it can better adapt to irregularly shaped tumors, thereby improving the personalization and targeting of the irradiation plan. The combination of components such as the scanning magnet, ionization chamber, range adjuster (also called range adjuster or range shifter) and adaptive grating can provide patients with accurate and flexible radiotherapy.

[0080] The accelerator is mounted on the treatment gantry and can rotate with it. This integrated design can reduce the complexity of the equipment because no beam transmission line is required, thereby simplifying the structure of the equipment. This also improves the stability of the beam. Because the beam transmission line inevitably introduces factors of beam instability, radiotherapy equipment does not require a beam transmission line, thereby reducing the maintenance cost and failure rate of the equipment and improving the stability and reliability of the equipment. By reducing the introduction of unstable factors, the movement of the beam is more stable, which helps to maintain the stability of the particle beam and ensure accurate irradiation.

[0081] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes shall fall within the scope of protection of the claims of the present invention.

Claims

1. A superconducting coil adjustment unit, characterized in that: include: A rotating shaft (1) is used to be connected to an external driving unit (200) and is capable of rotating under the drive of the driving unit (200); A driving assembly (2) comprising an actuator (21) and a tension assembly (22) connected to each other, wherein the actuator (21) is used to drive the tension assembly (22) to move linearly by rotation, and one end of the tension assembly (22) is used to be connected to the superconducting coil and can drive the superconducting coil to move; a transmission assembly (3), connected to the rotating shaft (1) and the actuator (21), respectively, and used to transmit power generated by the rotating shaft (1) to the actuator (21), so as to drive at least a portion of the actuator (21) to rotate; A detection element (4) is connected to the actuator (21) and detects the rotation angle of the actuator (21) to monitor the displacement of the tension component (22) and the superconducting coil.

2. The superconducting coil adjustment unit according to claim 1, characterized in that: The transmission assembly (3) comprises a driving gear (31) sleeved on the rotating shaft (1) and a driven gear (32) fixedly connected to the actuator (21), wherein the driving gear (31) meshes with the driven gear (32) to transmit the power of the rotating shaft (1) to the actuator (21); And / or, the actuator (21) is a differential screw, and the inner wheel of the differential screw is lower than the outer wheel of the differential screw along the height direction of the superconducting coil adjustment unit.

3. The superconducting coil adjustment unit according to claim 1, characterized in that: The tension component (22) is connected to a pressure detection component (5), and the pressure detection component (5) is used to detect the force applied by the tension component (22) to the superconducting coil; And / or, the detection element (4) is a potentiometer.

4. The superconducting coil adjustment unit according to claim 1, characterized in that: It also includes a limiting member (6) and a shell (7), wherein the limiting member (6) is connected to the tension assembly (22), and a limiting space (71) for accommodating the limiting member (6) is formed in the shell (7), and the wall forming the limiting space (71) is at least partially stacked with the limiting member (6) along the moving direction of the tension assembly (22), so that the wall forming the limiting space (71) limits the moving range of the limiting member (6); And / or, a protrusion (72) capable of extending into the limiting space (71) is provided in the housing (7), and the protrusion (72) is provided at one end of the tension component (22) facing the superconducting coil to limit the movement range of the tension component (22).

5. The superconducting coil adjustment unit according to claim 1, characterized in that: One end of the tension component (22) used for connecting to the superconducting coil is provided with a connecting portion (221) and a fixing member (222); the connecting portion (221) includes a connecting cavity (2211) and a fixing hole (2212) communicating with the connecting cavity (2211); the connecting cavity (2211) is used to accommodate an adjustment component (300) connected to the superconducting coil; the fixing member (222) penetrates into the connecting cavity (2211) through the fixing hole (2212) and fixes the adjustment component (300).

6. A superconducting coil adjustment device, characterized in that: include: The superconducting coil adjustment unit according to any one of claims 1 to 5; A driving unit (200) connected to the rotating shaft (1) of the superconducting coil adjustment unit and used to drive the rotating shaft (1) to rotate; An adjustment component (300) has one end for connecting to the superconducting coil and the other end for connecting to the tension component (22) of the superconducting coil adjustment unit, wherein the tension component (22) drives the superconducting coil to move through the adjustment component (300).

7. The superconducting coil adjustment device according to claim 6, characterized in that: It also includes a control unit, which is connected to the detection element (4) and the drive unit (200) respectively to receive detection information from the detection element (4) and control the operation of the drive unit (200).

8. The superconducting coil adjustment device according to claim 6, characterized in that: The tension component (22) is provided with a connecting portion (221) and a fixing member (222) at one end thereof for connecting to the superconducting coil; the adjustment component (300) comprises a tension rod (301), and a first matching member (302) and a second matching member (303) distributed at opposite ends of the tension rod (301); the first matching member (302) is used to connect to the superconducting coil, and the second matching member (303) is used to connect to the connecting portion (221) of the tension component (22), and is relatively fixed to the tension component (22) via the fixing member (222).

9. A cyclotron, characterized in that: include: At least one superconducting coil adjustment device according to any one of claims 6 to 8; superconducting coils; The mounting bracket is provided with an installation space for accommodating the superconducting coil, and the mounting bracket includes at least one matching portion for cooperating with the superconducting coil device. The superconducting coil adjustment device adjusts the position of the mounting bracket and the superconducting coil installed in the mounting bracket through the matching portion.

10. The cyclotron according to claim 9, characterized in that At least one pair of superconducting coil adjustment devices is provided, and one pair of superconducting coil adjustment devices is distributed at opposite ends of the superconducting coil, and the one pair of superconducting coil adjustment devices is used to adjust the position of the superconducting coil along the X-axis, Y-axis or Z-axis, wherein the X-axis, Y-axis and Z-axis are perpendicular to each other and intersect at the physical center of the cyclotron.

11. The cyclotron according to claim 9, wherein: It also includes a plurality of magnetic field detection elements, which are spaced apart to measure the magnetic field strength at a plurality of locations in the cyclotron; Alternatively, it further includes a magnetic field detection device, which includes a detection end and a driving component, wherein the detection end is used to detect the magnetic field strength at the location of the detection end, and the driving component is used to drive the detection end to move to measure the magnetic field strength at multiple locations in the cyclotron.

12. A superconducting coil debugging method, characterized in that: The superconducting coil debugging method is applied to the cyclotron accelerator according to any one of claims 9 to 11, and the superconducting coil debugging method comprises: Obtaining an offset of the superconducting coil, and obtaining an adjustment amount required by each superconducting coil adjustment device through the offset of the superconducting coil; Each superconducting coil adjustment device controls the driving unit (200) to operate according to a required adjustment amount, so as to drive the superconducting coil to be adjusted to a specified position.

13. The superconducting coil debugging method according to claim 12, characterized in that: Also includes: The rotation angle of the actuator (21) driven by the drive unit (200) is monitored by a detection element (4) to obtain an actual adjustment amount of the superconducting coil adjustment device. When the actual adjustment amount of the superconducting coil adjustment device is the same as the adjustment amount required by the superconducting coil adjustment device, the drive unit (200) stops operating.

14. A radiotherapy device, characterized in that: A cyclotron comprising the cyclotron according to any one of claims 9 to 11.

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