Testing device and testing method of treatment head stretching support

Abstract

The invention discloses a testing device of a treatment head stretching support and a testing method thereof. The testing device comprises a base, a supporting rod arranged on the base, a mounting plate, a first driving assembly used for driving the mounting plate to rotate and driving the extension support to rotate relative to the base around a rotating shaft parallel to the horizontal plane, and an extension tool used for being installed on the extension support and arranged in a suspended mode. The front end of the extension tool is set as an isocenter of the treatment head, the supporting rod is used for supporting the extension support, the mounting plate is used for being connected with one end, provided with the two target balls, of the extension support, and the mounting plate can rotate relative to the base around a rotating shaft parallel to the horizontal plane and drive the extension support to rotate so that the extension support can rotate to the needed angle. The extension tool is arranged to stretch together with the extension support and rotate around the first driving assembly. The testing device can measure the deformation quantity of the stretching support at different angles and different stretching positions, so that the subsequent compensation of the deformation quantity of the stretching support is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of high-end medical equipment, and in particular to a testing device and a testing method for a treatment head extension bracket. Background Art

[0002] Radiotherapy is one of the important means of tumor treatment. Radiotherapy equipment mainly includes linear accelerator, proton accelerator and carbon ion accelerator. Among them, proton accelerator is a radiotherapy system that provides proton beams for clinical treatment. The radiotherapy system is designed to deliver the proton beam with prescription dose and three-dimensional dose distribution provided in the treatment planning system to the designated patient treatment site. The treatment head needs to find an optimal distance from the affected area when emitting the beam, so the treatment head is set on a stretchable bracket that can be extended back and forth, and the stretchable bracket can drive the treatment head to move back and forth. However, due to the large weight of the treatment head, when the stretchable bracket is extended, the front end of the stretchable bracket may have a certain overhang deformation, which will cause the position of the treatment head to shift, thereby affecting the treatment effect. In addition, under different treatments, the stretchable bracket will be at different angles and different extension amounts. The deformation of the stretchable bracket is different at different angles and extension amounts. In this way, the deformation of the stretchable bracket needs to be compensated accordingly to avoid the adverse effects caused by the deformation of the stretchable bracket. Therefore, in order to effectively compensate for the deformation of the stretchable bracket, it is necessary to first design a test device and a test method for the deformation of the stretchable bracket. Summary of the invention

[0003] The object of the present invention is to provide a testing device and a testing method for a treatment head extension bracket, which can measure the deformation of the extension bracket at different angles and different extension positions, thereby facilitating subsequent compensation of the deformation of the extension bracket.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A testing device for an extension bracket of a treatment head, comprising: a base, a support rod arranged on the base, a mounting plate, a first driving assembly for driving the mounting plate to rotate and driving the extension bracket to rotate relative to the base about a rotation axis parallel to a horizontal plane, an extension tooling for being installed on the extension bracket and suspended, the front end of the extension tooling being set as the isocenter of the treatment head, the support rod being arranged below the extension bracket and used for supporting the extension bracket, the mounting plate being connected to one end of the extension bracket provided with two target balls, the mounting plate being able to rotate relative to the base about a rotation axis parallel to a horizontal plane and driving the extension bracket to rotate so that the extension bracket rotates to a desired angle, the extension tooling being arranged to telescope together with the extension bracket and to rotate around the first driving assembly, the first driving assembly and the extension tooling being respectively located at two ends of the extension bracket.

[0006] Preferably, it also includes a height adjustment component, which is arranged on the base and is used to adjust the height of the support rod. The height adjustment component includes an adjustment rod and an adjustment seat. The adjustment seat is provided with a groove, one end of the adjustment rod abuts against the bottom of the groove, and an adjustment hole is provided on the support rod. The adjustment rod is inserted through the adjustment hole, and an internal thread matching the external thread on the adjustment rod is provided in the adjustment hole. The adjustment rod is rotated to drive the support rod to move up and down along the adjustment rod.

[0007] Preferably, the height adjustment assembly further comprises a first knob, wherein the first knob is arranged at an end of the adjustment rod away from the bottom of the groove; and / or,

[0008] The height adjustment assembly also includes a locking member, which is used to tighten the side walls on both sides of the groove inward so that the side walls on both sides of the groove clamp the support rod.

[0009] Preferably, the first driving assembly is connected to the mounting plate, and the first driving assembly is used to drive the mounting plate to rotate relative to the base about a rotation axis parallel to a horizontal plane.

[0010] Preferably, the first driving assembly includes a driving mechanism, a rotating shaft and a bearing seat, the rotating shaft passes through the bearing seat, the bearing seat is used to support the rotating shaft, one end of the rotating shaft is connected to the driving mechanism, and the other end of the rotating shaft is connected to the mounting plate, and the driving mechanism is used to drive the rotating shaft to rotate and drive the mounting plate to rotate relative to the base with a rotation axis parallel to the horizontal plane.

[0011] Preferably, a roller and a first supporting leg are provided at the bottom of the base, the roller and the first supporting leg are provided in pairs, and the roller and the first supporting leg are provided at four corners of the base; and / or,

[0012] A second supporting leg is also provided at the bottom of the base, and the height of the second supporting leg is adjustable.

[0013] Preferably, the number of the support rods is one or more. When there are multiple support rods, the multiple support rods are distributed at intervals; and / or,

[0014] There are two mounting plates, which are respectively arranged on both sides of the extension bracket and connected by a connecting plate.

[0015] A method for testing a treatment head extension bracket, comprising:

[0016] Step S10: installing the extension bracket on the mounting plate of the testing device of the aforementioned treatment head extension bracket, wherein the support rod supports the lower surface of the extension bracket;

[0017] Step S20: providing an extension tool, setting the extension tool at the front end of the extension bracket, setting the front end of the extension tool as the isocenter of the treatment head, obtaining the ideal coordinates of the isocenter of the treatment head by an optical measuring instrument, and fitting the ideal coordinates of the isocenter of the treatment head when the extension bracket is rotated to different angles and the extension bracket is located at different extension positions;

[0018] Step S30: completely separate the support rod from the lower surface of the extension bracket, and obtain the actual coordinates of the isocenter of the treatment head when the extension bracket is rotated to different angles and the extension bracket is located at different extension positions by controlling the rotation angle of the extension bracket and / or controlling the extension length of the extension bracket, and using an optical measuring instrument;

[0019] Step S40: By comparing the ideal coordinates of the isocenter of the treatment head with the actual coordinates of the isocenter of the treatment head, the rotation angle that needs to be compensated for the extension bracket and the extension length that needs to be compensated for the extension bracket are calculated.

[0020] Preferably, the step S10 includes:

[0021] Step S11: adjusting the plane where the connecting plate is located to be perpendicular to the direction of gravity by testing with a level;

[0022] Step S12: installing the extension bracket on the mounting plate, wherein the support rod supports the lower surface of the extension bracket;

[0023] Step S13: adjusting the plane where the upper end surface of the end of the extension bracket away from the mounting plate is located to be perpendicular to the direction of gravity by testing with a level meter.

[0024] Preferably, the step S20 includes:

[0025] Step S21: two target balls are arranged at one end of the extension bracket connected to the mounting plate, and a connecting line of the two target balls is adjusted to be parallel to the extension direction of the extension bracket and a plane where the two target balls are located is adjusted to be perpendicular to the gravity direction by an optical measuring instrument;

[0026] Step S22: providing an extension tool, setting the extension tool at the front end of the extension bracket, setting a target ball at the front end of the extension tool, setting the target ball at the front end of the extension tool as the isocenter of the treatment head, and fitting the isocenter to the plane where the two target balls in step S21 are located by an optical measuring instrument;

[0027] Step S23: using an optical measuring instrument to fit the ideal coordinates of the isocenter of the treatment head when the extension bracket is rotated to different angles and the extension bracket is located at different extension positions.

[0028] Preferably, the two target balls arranged at one end of the extension bracket connected to the mounting plate include target ball A and target ball B, the target ball arranged at the front end of the extension tooling is target ball C, the distance between target ball A and target ball B is greater than the distance between target ball A and the rotation axis, the extension direction of the line between target ball A and target ball B is the same as the extension direction of the extension bracket, and target ball A and target ball B are not coplanar with target ball C.

[0029] Compared with the prior art, the beneficial effects of the present invention include at least:

[0030] The testing device and testing method of the therapeutic head extension bracket of the present invention can measure the deformation of the extension bracket at different angles by driving the extension bracket to rotate to different angles through the mounting plate, and then measure the deformation of the extension bracket at different extension positions by controlling the extension bracket to extend to different positions, thereby providing reliable data support for subsequent compensation of the deformation of the extension bracket, ensuring that the therapeutic head accurately delivers the proton beam to the patient's treatment site, thereby improving the treatment effect. Since the extension bracket is composed of multiple parts and is not convenient to assemble on a plane, the extension bracket is assembled on the testing device of the therapeutic head extension bracket, and the testing device of the therapeutic head extension bracket can provide support for the extension bracket, facilitate the assembly of the extension bracket, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the testing device according to the embodiment of the present invention.

[0032] Figure 2 2 is a schematic structural diagram of an extension bracket according to an embodiment of the present invention.

[0033] Figure 3 It is a structural schematic diagram of an extension bracket of an embodiment of the present invention installed on a testing device from one viewing angle.

[0034] Figure 4 It is a structural schematic diagram of another viewing angle of the extension bracket of the embodiment of the present invention installed on the testing device.

[0035] Figure 5 It is a schematic diagram of the structure of the extension bracket according to the embodiment of the present invention when it is rotated to different angles.

[0036] Figure 6 It is a comparison diagram between the ideal trajectory and the actual trajectory of the C target ball in the embodiment of the present invention.

[0037] Figure 7 is a flow chart of a testing method of a testing device according to an embodiment of the present invention.

[0038] In the figure: 100, test device; 1, base; 11, crossbeam; 12, vertical beam; 13, first layer; 14, second layer; 141, support column; 142, support platform; 15, roller; 16, first support leg; 17, second support leg; 2, support rod; 3, mounting plate; 31, connecting plate; 32, mounting hole; 4, height adjustment component; 41, adjustment rod; 411, first knob; 42, adjustment seat; 42 1. groove; 43. locking piece; 431. second knob; 5. first drive assembly; 51. drive mechanism; 52. rotating shaft; 53. bearing seat; 54. synchronous belt; 55. synchronous wheel; 200. extension bracket; 210. fixed base; 220. movable bottom plate; 230. movable bracket; 240. second drive assembly; 250. extension tooling; 260. target ball A; 270. target ball B; 280. target ball C. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0040] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0041] Reference Figures 1 to 6 The present invention provides a testing device 100 for an extension bracket of a treatment head. The testing device 100 provides a stable platform for the installation and debugging test of the extension bracket 200. In a radiotherapy system, a treatment head (not shown) is installed on the extension bracket 200. The extension bracket 200 can drive the treatment head to move telescopically in the front-back direction. One end of the extension bracket 200 is connected to a rotating frame (not shown). The rotating frame can drive the extension bracket 200 to rotate, and the extension bracket 200 can drive the treatment head to rotate together. The testing device 100 may include a base 1, a support rod 2 arranged on the base 1, a mounting plate 3, a first driving component 5 for driving the mounting plate 3 to rotate and drive the extension bracket 200 to rotate relative to the base 1 about a rotation axis parallel to the horizontal plane, and an extension tool 250 for being installed on the extension bracket 200 and suspended. The front end of the extension tool 250 is set as the isocenter of the treatment head. The support rod 2 and the mounting plate 3 can be arranged on the base 1. The support rod 2 can be arranged below the extension bracket 200 and used to support the extension bracket 200. The mounting plate 3 is used to rotate with the base 1. The extension bracket 200 is provided with one end of two target balls connected, and the mounting plate 3 can rotate relative to the base 1 with a rotation axis parallel to the horizontal plane and drive the extension bracket 200 to rotate, that is, the mounting plate 3 can rotate relative to the base 1 with a rotation axis parallel to the horizontal plane on the vertical plane and drive the extension bracket 200 to rotate, so that the extension bracket 200 is rotated to a desired angle, and the extension tooling 250 is configured to telescope together with the extension bracket 200 and rotate around the first driving component 5, and the first driving component 5 and the extension tooling 250 are respectively located at both ends of the extension bracket 200.

[0042] Specifically, refer to Figure 1The base 1 is a large frame of the test device 100. The base 1 can be composed of a plurality of cross beams 11 and a plurality of vertical beams 12. The plurality of cross beams 11 and the plurality of vertical beams 12 can be fixedly connected by welding, bolting, riveting, etc. The material of the cross beams 11 and the vertical beams 12 is preferably a square tube. The square tube usually exhibits higher strength and stability when subjected to bending and twisting forces, which can reduce the deformation of the base 1 itself, thereby ensuring the accuracy of measuring the deformation amount of the extension bracket 200. The base 1 can include an upper and lower layer, that is, the base 1 includes a first layer 13 and a second layer 14 arranged above the first layer 13. The first layer 13 is rectangular as a whole and is composed of a plurality of cross beams 11. The second layer 14 includes at least one group of support columns 141 and a support platform 142 for setting the mounting plate 3. The support rod 2 can be arranged on the support column 141, each group of support columns 141 can include two support columns 141, and the two ends of the support rod 2 can be respectively arranged on the two support columns 141, and the support rod 2 can be arranged below the extension bracket 200 and used to support the extension bracket 200, which can prevent the extension bracket 200 from deforming during the assembly process. The support column 141 can make a certain distance between the extension bracket 200 and the first layer 13, provide enough space for installing the extension bracket 200, ensure the convenience of installation, speed up the installation process, improve work efficiency, and ensure personnel safety to a certain extent.

[0043] As a preferred method, refer to Figure 1 , the bottom of the base 1 may be provided with a roller 15 and a first supporting leg 16, that is, the bottom of the first layer 13 may be provided with a roller 15 and a first supporting leg 16, that is, the roller 15 and the first supporting leg 16 are arranged on the side of the first layer 13 facing the ground. The roller 15 and the first supporting leg 16 are preferably arranged in pairs, and the roller 15 and the first supporting leg 16 can be arranged at the four corners of the base 1. The height of the first supporting leg 16 is adjustable, and by adjusting the first supporting leg 16, it can be ensured that the test device 100 can remain stable on different ground surfaces. When the roller 15 contacts the ground, the first supporting leg 16 is away from the ground, which facilitates the movement of the test device 100. When the first supporting leg 16 contacts the ground, it is ensured that the test device 100 will not move at will.

[0044] Reference Figure 1, the bottom of the base 1 may also be provided with a second support leg 17, that is, the bottom of the first layer 13 may also be provided with a second support leg 17. The second support leg 17 and the first support leg 16 may be support legs of the same type or of different types, and the two have the same function. The height of the second support leg 17 is also adjustable, and by adjusting the second support leg 17, it can be ensured that the test device 100 can remain stable on different ground surfaces. When the roller 15 contacts the ground, the second support leg 17 is away from the ground, which facilitates the movement of the test device 100. When the second support leg 17 contacts the ground, it is ensured that the test device 100 does not move at will. The number of the second support legs 17 may be one or more. In this embodiment, the number of the second support legs 17 is two, and the two second support legs 17 are spaced apart at the bottom of the first layer 13, that is, the two second support legs 17 are spaced apart on the side of the first layer 13 facing the ground. The first support leg 16 and the second support leg 17 are provided at the same time, so that six support points can be provided for the test device 100 to contact the ground, further improving the stability of the position of the test device 100.

[0045] Reference Figure 1 The support rod 2 is arranged horizontally or approximately horizontally relative to the bottom surface. The number of the support rod 2 can be one or more. When there are multiple support rods 2, the multiple support rods 2 are distributed at intervals. The multiple support rods 2 can provide more stable support for the extension bracket 200, further avoiding or reducing the deformation of the extension bracket 200.

[0046] Reference Figure 1 The mounting plate 3 can rotate relative to the base 1 about a rotation axis parallel to the horizontal plane, that is, the mounting plate 3 can rotate relative to the base 1 on a vertical plane about a rotation axis parallel to the horizontal plane. One end of the extension bracket 200 used for connecting to the rotating frame can be connected to the mounting plate 3, and the mounting plate 3 can drive the extension bracket 200 to rotate together. In this way, the movement state of the extension bracket 200 on the rotating bracket can be simulated, eliminating other unfavorable factors to improve the reliability of the radiotherapy system.

[0047] As an example, see Figure 2The extension bracket 200 may include a fixed base 210, a movable base plate 220 and a movable bracket 230. The movable base plate 220 may be disposed above the fixed base 210 and may move along the extension direction of the extension bracket 200, i.e., the front-rear direction. The movable bracket 230 may be disposed above the movable base plate 220 and may move along the extension direction of the extension bracket 200, i.e., the front-rear direction. The support rod 2 may be disposed below the fixed base 210 and used to support the fixed base 210. When the extension bracket 200 is fully extended, part of the movable base plate 220 extends to the right and may protrude from the fixed base 210, i.e., part of the movable base plate 220 extends to the side close to the patient and may protrude from the fixed base 210, and the movable bracket 230 is on the right side of the movable base plate 220 and may protrude from the movable base plate 220, i.e., the movable bracket 230 is on the side of the movable base plate 220 close to the patient and may protrude from the movable base plate 220. When the extension bracket 200 is fully retracted, the movable base plate 220 is retracted to the left, that is, the movable base plate 220 is retracted to the side away from the patient, the right side of the movable base plate 220 is substantially flush with the right side of the fixed base 210 or retracted to the right side of the fixed base 210, the movable bracket 230 is on the left side of the movable base plate 220, that is, the movable bracket 230 is on the side of the movable base plate 220 away from the patient, and the right side of the treatment device installed on the movable bracket 230 is substantially flush with the right side of the fixed base 210 or retracted to the right side of the fixed base 210. Figure 4 A second driving assembly 240 may also be provided on the extension bracket 200, and the second driving assembly 240 is used to drive the movable base plate 220 and the movable bracket 230 to move along the extension direction of the extension bracket 200, that is, the second driving assembly 240 can drive the extension bracket 200 to move in an extension manner to ensure the extension accuracy of the extension bracket 200.

[0048] Reference Figure 1 , a plurality of mounting holes 32 may be provided on the mounting plate 3, and the mounting plate 3 and the extension bracket 200 may be fixedly connected by pins and screws, that is, the mounting plate 3 and the fixed base 210 may be fixedly connected by pins and screws. The pins are used for positioning between the mounting plate 3 and the fixed base 210, so as to facilitate installation and removal between the mounting plate 3 and the fixed base 210, and the screws are used for fixing the mounting plate 3 and the fixed base 210. The distribution and shape of the mounting holes 32 on the mounting plate 3 are the same as the distribution and shape of the mounting holes 32 on the rotating frame, which can ensure that the extension bracket 200 is installed on the test device 100 and installed on the rotating frame in the same manner, so that the test device 100 can simulate the real use scenario of the extension bracket 200 to the greatest extent, thereby ensuring the accuracy of the test.

[0049] As a preferred embodiment, there are two mounting plates 3, which are respectively arranged on both sides of the extension bracket 200, that is, the two mounting plates 3 are respectively arranged on both sides of the fixed base 210, and the two mounting plates 3 are more stably connected to the fixed base 210. The two mounting plates 3 and the connecting plate 31 can be connected by welding, and the two mounting plates 3 and the connecting plate 31 can be connected to form a U shape as a whole. The connecting plate 31 connects the two mounting plates 3 as a whole, which can ensure that the two mounting plates 3 rotate synchronously, thereby ensuring the stability of the rotation of the extension bracket 200.

[0050] In the present application, the extension bracket 200 is driven to rotate to different angles by the mounting plate 3, and the deformation of the extension bracket 200 at different angles can be measured; and the extension bracket 200 is controlled to extend to different positions, and the deformation of the extension bracket 200 at different extension positions can be measured, thereby providing reliable data support for the subsequent compensation of the deformation of the extension bracket 200, ensuring that the treatment head accurately delivers the proton beam to the patient's treatment site, thereby improving the treatment effect. Since the extension bracket 200 is composed of multiple parts, it is not convenient to assemble on a plane. The extension bracket 200 is assembled on the test device 100 of the extension bracket of the treatment head. The test device 100 of the extension bracket of the treatment head can provide support for the extension bracket 200, which is convenient for the assembly of the extension bracket 200 and improves work efficiency.

[0051] In a specific embodiment, referring to Figure 1 The test device 100 may further include a height adjustment component 4, which is disposed on the base 1 and is used to adjust the height of the support rod 2, that is, the height adjustment component 4 may be disposed on the support column 141. Specifically, the height adjustment component 4 may include an adjustment rod 41 and an adjustment seat 42, the adjustment seat 42 may be disposed on the support column 141, a groove 421 may be disposed on the adjustment seat 42, one end of the adjustment rod 41 may abut against the bottom of the groove 421, an adjustment hole (not shown) may be disposed on the support rod 2, the adjustment rod 41 may penetrate the adjustment hole, and an internal thread (not shown) matching the external thread (not shown) on the adjustment rod 41 may be disposed in the adjustment hole, and the adjustment rod 41 may be rotated to drive the support rod 2 to move up and down along the adjustment rod 41. When the rotation of the adjustment rod 41 drives the support rod 2 to move upward along the adjustment rod 41, the support rod 2 approaches and abuts against the lower surface of the extension bracket 200, and the support rod 2 may provide a supporting force for the extension bracket 200, facilitate the installation of the extension bracket 200, and also prevent the extension bracket 200 from being deformed. When the rotating adjustment rod 41 drives the support rod 2 to move downward along the adjustment rod 41, the support rod 2 is away from the lower surface of the extension bracket 200 and is separated from the extension bracket 200. At this time, the extension bracket 200 is suspended, which is consistent with the actual usage scenario, facilitates testing and verification of the extension bracket 200, and helps to improve the performance of the extension bracket 200.

[0052] As a preferred method, refer to Figure 1 The height adjustment assembly 4 may further include a first knob 411, which may be disposed at one end of the adjustment rod 41 away from the bottom of the groove 421, and the adjustment rod 41 may be controlled by rotating the first knob 411 to drive the support rod 2 to move up and down along the adjustment rod 41. The first knob 411 may not only easily control the adjustment rod 41 without the aid of other complicated tools, which may greatly improve work efficiency, especially in situations where frequent adjustments are required, but also the first knob 411 may achieve relatively fine adjustments, which may meet application scenarios with high precision requirements, and gradually adjust the support rod 2 with a smaller amplitude to ensure that the support rod 2 reaches the optimal position, especially when the support rod 2 abuts against the lower surface of the extension bracket 200, by adjusting the position of the support rod 2, it may be ensured that the extension bracket 200 remains horizontal.

[0053] Reference Figure 1 The height adjustment assembly 4 may further include a locking member 43, which is used to tighten the side walls on both sides of the groove 421 inwardly so that the side walls on both sides of the groove 421 clamp the support rod 2. The locking member 43 preferably penetrates the side walls on both sides of the groove 421 and the support rod 2 at the same time, so that the locking member 43 can not only clamp and lock the support rod 2 to prevent the support rod 2 from shaking, but also prevent the support rod 2 from falling off the adjustment seat 42 even when the side walls on both sides of the groove 421 do not clamp the support rod 2. The side walls on both sides of the groove 421 are preferably separated from each other, that is, the other two sides of the groove 421 are open, so that the side walls on both sides of the groove 421 are easier to shrink inwardly, which is convenient for operation. At least one end of the locking member 43 is provided with a second knob 431, and the second knob 431 can also easily control the locking member 43 without the aid of other complicated tools, which can greatly improve work efficiency.

[0054] In a specific embodiment, referring to Figure 1 The test device 100 may further include a first drive assembly 5, which may be connected to the mounting plate 3. The first drive assembly 5 is used to drive the mounting plate 3 to rotate relative to the base 1 with a rotation axis parallel to the horizontal plane. The first drive assembly 5 is used to drive the mounting plate 3 to rotate relative to the base 1 with a rotation axis parallel to the horizontal plane on a vertical plane. The mounting plate 3 drives the extension bracket 200 to rotate relative to the base 1 with a rotation axis parallel to the horizontal plane. The mounting plate 3 drives the extension bracket 200 to rotate relative to the base 1 with a rotation axis parallel to the horizontal plane on a vertical plane. The first drive assembly 5 can not only realize the automatic rotation of the extension bracket 200, but also the first drive assembly 5 can accurately control the rotation angle of the extension bracket 200, thereby improving the test accuracy of the test device 100.

[0055] Specifically, refer to Figure 1The first driving assembly 5 may include a driving mechanism 51, a rotating shaft 52 and a bearing seat 53. The rotating shaft 52 passes through the bearing seat 53 and is rotatably connected to the bearing seat 53. The bearing seat 53 may be disposed on the supporting platform 142. The bearing seat 53 is used to support the rotating shaft 52. One end of the rotating shaft 52 is connected to the driving mechanism 51, and the other end of the rotating shaft 52 is connected to the mounting plate 3. The driving mechanism 51 is used to drive the rotating shaft 52 to rotate and drive the mounting plate 3 to rotate relative to the base 1 with a rotation axis parallel to the horizontal plane, that is, the driving mechanism 51 is used to drive the rotating shaft 52 to rotate and drive the mounting plate 3 to rotate relative to the base 1 with a rotation axis parallel to the horizontal plane on the vertical plane. Driven by the driving mechanism 51, the extension bracket 200 can rotate to different angles with the mounting plate 3 to simulate the actual use of the extension bracket 200. The number of bearing seats 53 is the same as the number of mounting plates 3. In the present embodiment, the number of mounting plates 3 and the number of bearing seats 53 are both two. The two bearing seats 53 can be fixed to the supporting platform 142 by pins and screws. The relative positions of the two bearing seats 53 can be adjusted to ensure that the rotating axes 52 of the two bearing seats 53 are on the same straight line. This not only ensures the stability and accuracy of the rotation of the extension bracket 200, but also reduces the wear between the rotating shaft 52 and the bearing seat 53, thereby extending the service life of the first drive assembly 5.

[0056] One end of the rotating shaft 52 can be directly connected to the driving mechanism 51, and one end of the rotating shaft 52 can also be connected to the driving mechanism 51 through a synchronous belt 54 and a synchronous wheel 55. In this embodiment, one end of the rotating shaft 52 can also be connected to the driving mechanism 51 through a synchronous belt 54 and a synchronous wheel 55. Specifically, the synchronous wheel 55 is arranged at one end of the rotating shaft 52, and the driving mechanism 51 drives the synchronous wheel 55 to rotate through the synchronous belt 54, and the synchronous wheel 55 drives the rotating shaft 52 to rotate. The driving mechanism 51 is, for example, a motor, and the driving mechanism 51 can be arranged between the supporting platform 142 and the first layer 13. Such an installation method is safe and space-saving, and greatly optimizes the overall aesthetics and safety of the testing device 100.

[0057] Reference Figure 7 The present invention also provides a method for testing a treatment head extension bracket 200, comprising: steps S10 to S40.

[0058] Step S10 : installing the extension bracket 200 on the mounting plate 3 of the testing device 100 of the treatment head extension bracket, and the support rod 2 supports the lower surface of the extension bracket 200 .

[0059] Specifically, step S10 may include: step S11 to step S13.

[0060] Step S11: Place a level tester on the connecting plate 31, and adjust the plane where the connecting plate 31 is located to be perpendicular to the direction of gravity through the level tester, that is, the plane where the connecting plate 31 is located is completely horizontal, to ensure that the testing device 100 provides a completely horizontal installation platform for the extension bracket 200.

[0061] Step S12: Refer to Figure 3 , Figure 4 , the treatment head is installed on one end of the extension bracket 200. In this embodiment, at least part of the treatment head can be installed on the mobile bracket 230, and the other end of the extension bracket 200 is installed on the mounting plate 3, that is, the fixed base 210 is installed on the mounting plate 3, and the mounting plate 3 and the fixed base 210 can be fixedly connected by pins and screws. At this time, the support rod 2 supports the lower surface of the extension bracket 200.

[0062] Step S13: At this time, the extendable bracket 200 can be fully extended or fully retracted. Figure 3 , Figure 4 In this embodiment, the second driving assembly 240 is used to fully extend the extension bracket 200. A level tester is placed on the upper end surface of the end of the extension bracket 200 away from the mounting plate 3, that is, the level tester is placed on the mobile bracket 230, and the plane where the upper end surface of the end of the extension bracket 200 away from the mounting plate 3 is located is adjusted to be perpendicular to the gravity direction by the level tester. At this time, the support rod 2 supports the lower surface of the extension bracket 200, and the extension bracket 200 will not be deformed as a whole, or the deformation of the extension bracket 200 as a whole is very small and can be ignored. It can be considered that the extension bracket 200 is completely horizontal at this time.

[0063] Step S20: Provide an extension tool 250, set the extension tool 250 at the front end of the treatment head, set the front end of the extension tool 250 as the isocenter of the treatment head, obtain the ideal coordinates of the isocenter of the treatment head through an optical measuring instrument, and fit the ideal coordinates of the isocenter of the treatment head when the extension bracket 200 is rotated to different angles and the extension bracket 200 is located at different extension positions. The optical measuring instrument is preferably a laser tracker or a theodolite, and both the laser tracker and the theodolite can monitor and track information such as the target position and motion trajectory in real time.

[0064] Specifically, step S20 may include: step S21 to step S23.

[0065] Step S21: Refer to Figure 2Two target balls are arranged at one end of the extension bracket 200 connected to the mounting plate 3. In this embodiment, two target balls can be arranged on the fixed base 210. The parts of the extension bracket 200 where the two target balls are located do not deform during the extension or rotation of the extension bracket 200, that is, the relative position relationship between the two target balls does not change, thereby providing a reliable reference for the coordinate calibration of the C target ball 280. The two target balls are respectively an A target ball 260 and a B target ball 270. Then, the connecting line of the two target balls is adjusted to be the same as or parallel to the extension direction, that is, the extension direction of the extension bracket 200 by an optical measuring instrument, and the plane where the two target balls are located is adjusted to be perpendicular to the gravity direction. In other words, two points are selected on a plane on the fixed base 210 by an optical measuring instrument, and the connecting line of the two points is parallel to the extension direction of the extension bracket 200. The A target ball 260 and the B target ball 270 are arranged at the two points respectively, and the optical measuring instrument can track the moving trajectories of the A target ball 260 and the B target ball 270. The distance between the A target ball 260 and the B target ball 270 is greater than the distance between the A target ball 260 and the rotation axis, and the extending direction of the line between the A target ball 260 and the B target ball 270 is the same as the telescopic direction of the extendable bracket 200 .

[0066] Step S22: Refer to Figure 3 , an extension tool 250 is provided, and the extension tool 250 is set at the front end of the extension bracket 200, that is, the extension tool 250 is set at the center of the front end of the mobile bracket 230, and the extension tool 250 is in the shape of a cylindrical rod. A C target ball 280 is set at the front end of the extension tool 250, and the C target ball 280 at the front end of the extension tool 250 is set as the isocenter of the treatment head, that is, the C target ball 280 is the isocenter of the treatment head. The moving trajectory of the isocenter of the treatment head can be obtained by tracking the moving trajectory of the C target ball 280 through an optical measuring instrument. The extension tool 250 can be fine-tuned along the telescopic direction, which is more convenient to simulate the actual isocenter position coordinates. When adjusting the extension fixture 250, the cylindrical rod is fine-tuned forward and backward along the outer sleeve, and after adjustment, the top screw is used to lock it, which ensures the adjustment in the forward and backward directions, and ensures that the extension fixture 250 is accurately positioned in the other two directions perpendicular to the forward and backward directions. In addition, the target ball itself is spherical, and the extension fixture 250 is designed to be cylindrical, so that the front end of the extension fixture 250 is easier to match and fit the arc surface of the target ball. The A target ball 260 and the B target ball 270 are not coplanar with the C target ball 280, that is, the A target ball 260 and the B target ball 270 are not located on the same vertical plane or horizontal plane with the C target ball 280, which is conducive to simplifying the structure of the extension fixture 250. The simplified structure of the extension fixture 250 can reduce the influence of the error of the extension fixture itself on the deformation data of the extension bracket 200, and better ensure the accuracy of the test data.

[0067] The target sphere A 260 and the target sphere B 270 are fitted in a plane perpendicular to the direction of gravity by an optical measuring instrument, that is, this plane is parallel to the horizontal plane, and then the distance from the target sphere C 280 to the plane perpendicular to the direction of gravity fitted by the target sphere A 260 and the target sphere B 270 is measured by the optical measuring instrument. This distance is the ideal distance H0.

[0068] By using an optical measuring instrument, target sphere A 260 and target sphere B 270 are fitted in a plane parallel to the direction of gravity, and target sphere C 280 is fitted to the plane parallel to the direction of gravity fitted by target sphere A 260 and target sphere B 270, and then target sphere C 280 is lowered an ideal distance H0 in the direction of gravity. At this time, an ideal coordinate of the isocenter of the treatment head can be obtained.

[0069] In some embodiments, the plane fitted by target spheres A 260 and B 270 can be raised an ideal distance H0 in the direction of gravity, and target sphere C 280 can be fitted to the plane fitted by target spheres A 260 and B 270 and parallel to the direction of gravity. At this time, an ideal coordinate of the isocenter of the treatment head can be obtained.

[0070] Step S23: Refer to Figure 5 , Figure 6 The ideal coordinates of the isocenter of the treatment head when the extension bracket 200 is rotated to different angles and the extension bracket 200 is located at different extension positions are fitted by an optical measuring instrument. The ideal moving trajectory of the isocenter of the treatment head can be obtained through the ideal coordinates of multiple isocenters of the treatment head.

[0071] Step S30: Completely separate the support rod 2 and the lower surface of the extension bracket 200 from each other, and by controlling the rotation angle of the extension bracket 200 and / or controlling the extension length of the extension bracket 200, obtain the actual coordinates of the isocenter of the treatment head when the extension bracket 200 is rotated to different angles and the extension bracket 200 is located at different extension positions through an optical measuring instrument.

[0072] Specifically, refer to Figure 5 , Figure 6, the extension bracket 200 can be fully retracted by the second driving assembly 240, and then the support rod 2 can be moved downward along the adjustment rod 41 by rotating the first knob 411, so that the support rod 2 is away from the lower surface of the fixed base 210, until the support rod 2 and the lower surface of the fixed base 210 are completely separated from each other. At this time, under the action of gravity, the C target ball 280 is offset downward, and the positions of the A target ball 260 and the B target ball 270 are almost unchanged, which can be considered to be the same as the ideal value, so the A target ball 260 and the B target ball 270 can be used as a reference. Then, the first driving component 5 can be used to control the extension bracket 200 to rotate to different angles, and the second driving component 240 can be used to control the extension bracket 200 to extend to different positions, and the distance from the C target ball 280 to the plane fitted by the A target ball 260 and the B target ball 270 can be measured by the optical measuring instrument. This distance is the actual distance H1. The difference between the actual distance H1 and the ideal distance H0 is H2, and H2 is the actual offset, that is, the actual offset of the isocenter of the treatment head in the gravity direction. In other words, the actual coordinates of the isocenter of the treatment head when the extension bracket 200 rotates to different angles and the extension bracket 200 is located at different extension positions can be obtained by the optical measuring instrument. Through the actual coordinates of the isocenters of multiple treatment heads, the actual movement trajectory of the isocenter of the treatment head can be obtained.

[0073] As an example, see Figure 6 , the second driving component 240 is used to control the extension bracket 200 to be slowly extended, and from fully retracted to fully extended, several fixed points are selected to calibrate the coordinates of the C target sphere 280, that is, the coordinates of the isocenter of the treatment head are calibrated; after the extension bracket 200 is fully extended, the extension bracket 200 is fully retracted, and then the extension bracket 200 is rotated upward by 10° through the first driving component 5, and the previous step is repeated, and the extension bracket 200 is controlled to be slowly extended at an angle of 10° by the second driving component 240, and from fully retracted to fully extended, several fixed points are selected to calibrate the coordinates of the C target sphere 280, that is, the coordinates of the isocenter of the treatment head are calibrated. Next, the first driving component 5 can be used to rotate the extension bracket 200 upward at an angle of 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, etc., and the second driving component 240 can be used to control the extension bracket 200 to slowly extend. From fully retracted to fully extended, several fixed points are selected to calibrate the coordinates of the C target sphere 280, that is, the coordinates of the isocenter of the treatment head. Figure 6 In the embodiment, when the extension bracket 200 rotates to the same angle, from fully retracted to fully extended, five fixed points are selected to calibrate the coordinates of the C target ball 280. Figure 6 The actual coordinates of the isocenter of the treatment head are connected with a solid line in the figure to obtain the actual trajectory of the isocenter of the treatment head, that is, the actual coordinates of the isocenter of the treatment head are as follows: Figure 6The multiple actual coordinates on each solid line represent the actual coordinates of the isocenter of the treatment head at different extended positions when the extension bracket is rotated to the same angle. The multiple actual coordinates on the isocenter ring line represent the actual coordinates of the isocenter of the treatment head at different angles when the extension bracket is rotated to the same extended position.

[0074] The ideal coordinates of the isocenter of the treatment head are connected by a dotted line to obtain the ideal trajectory of the isocenter of the treatment head, that is, the ideal coordinates of the isocenter of the treatment head are as follows: Figure 6 The multiple ideal coordinates on each dotted line represent the ideal coordinates of the isocenter of the treatment head when the extension bracket is rotated to the same angle and the extension bracket is located at different extension positions. The multiple ideal coordinates on the isocenter ring line represent the ideal coordinates of the isocenter of the treatment head when the extension bracket is located at the same extension position and the extension bracket is rotated to different angles.

[0075] Step S40: By comparing the ideal coordinates of the isocenter of the treatment head with the actual coordinates of the isocenter of the treatment head, the rotation angle that needs to be compensated for the extension bracket 200 and the extension length that needs to be compensated for the extension bracket 200 are calculated.

[0076] Specifically, refer to Figure 6 By comparing the ideal moving trajectory of the isocenter of the treatment head with the actual moving trajectory of the isocenter of the treatment head, the difference between the ideal coordinates of the isocenter of the treatment head and the actual coordinates of the isocenter of the treatment head can be obtained. Figure 6 , ideal coordinates (X0, Y0), actual coordinates (X1, Y1), the angle between the fitting angle of the actual coordinates and the fitting angle of the ideal coordinates is α1, and the difference can be compensated later, including the correction of position and angle, that is, the rotation angle that needs to be compensated for the extension bracket 200 and the extension length that needs to be compensated for the extension bracket 200 are obtained by calculation, thereby ensuring the effect of radiotherapy.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute 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 should fall within the scope of protection of the claims of the present invention.

Claims

1. A testing device for a treatment head extension bracket, characterized in that: include: A base, a support rod arranged on the base, a mounting plate, a first driving assembly for driving the mounting plate to rotate and driving the extension bracket to rotate relative to the base about a rotation axis parallel to a horizontal plane, an extension tooling installed on the extension bracket and suspended, the front end of the extension tooling being set as the isocenter of the treatment head, the support rod being arranged below the extension bracket and used to support the extension bracket, the mounting plate being connected to one end of the extension bracket with two target balls, the mounting plate being able to rotate relative to the base about a rotation axis parallel to a horizontal plane and driving the extension bracket to rotate so that the extension bracket rotates to a desired angle, the extension tooling being arranged to telescope together with the extension bracket and to rotate around the first driving assembly, the first driving assembly and the extension tooling being respectively located at two ends of the extension bracket.

2. The testing device for the extension bracket of the treatment head according to claim 1, characterized in that: It also includes a height adjustment component, which is arranged on the base and is used to adjust the height of the support rod. The height adjustment component includes an adjustment rod and an adjustment seat. The adjustment seat is provided with a groove, one end of the adjustment rod abuts against the bottom of the groove, and an adjustment hole is provided on the support rod. The adjustment rod is inserted through the adjustment hole, and an internal thread matching the external thread on the adjustment rod is provided in the adjustment hole. The adjustment rod is rotated to drive the support rod to move up and down along the adjustment rod.

3. The testing device for the treatment head extension bracket according to claim 2, characterized in that: The height adjustment assembly further comprises a first knob, which is arranged at an end of the adjustment rod away from the bottom of the groove; and / or, The height adjustment assembly also includes a locking member, which is used to tighten the side walls on both sides of the groove inward so that the side walls on both sides of the groove clamp the support rod.

4. The testing device for the extension bracket of the treatment head according to claim 1, characterized in that: The first driving assembly is connected to the mounting plate, and is used to drive the mounting plate to rotate relative to the base about a rotation axis parallel to a horizontal plane.

5. The testing device for the extension bracket of the treatment head according to claim 4, characterized in that: The first driving assembly includes a driving mechanism, a rotating shaft and a bearing seat, the rotating shaft passes through the bearing seat, the bearing seat is used to support the rotating shaft, one end of the rotating shaft is connected to the driving mechanism, and the other end of the rotating shaft is connected to the mounting plate, and the driving mechanism is used to drive the rotating shaft to rotate and drive the mounting plate to rotate relative to the base with a rotation axis parallel to the horizontal plane.

6. The testing device for the extension bracket of the treatment head according to claim 1, characterized in that: The bottom of the base is provided with a roller and a first supporting leg, the roller and the first supporting leg are arranged in pairs, and the roller and the first supporting leg are arranged at four corners of the base; and / or, A second supporting leg is also provided at the bottom of the base, and the height of the second supporting leg is adjustable.

7. The testing device for the extension bracket of the treatment head according to claim 1, characterized in that: The number of the support rods is one or more, and when there are multiple support rods, the multiple support rods are distributed at intervals; and / or, There are two mounting plates, which are respectively arranged on both sides of the extension bracket and connected by a connecting plate.

8. A method for testing a treatment head extension bracket, characterized in that: include: Step S10: installing the extension bracket on the mounting plate of the testing device for the extension bracket of the treatment head according to any one of claims 1 to 7, wherein the support rod supports the lower surface of the extension bracket; Step S20: providing an extension tool, setting the extension tool at the front end of the extension bracket, setting the front end of the extension tool as the isocenter of the treatment head, obtaining the ideal coordinates of the isocenter of the treatment head by an optical measuring instrument, and fitting the ideal coordinates of the isocenter of the treatment head when the extension bracket is rotated to different angles and the extension bracket is located at different extension positions; Step S30: completely separate the support rod from the lower surface of the extension bracket, and obtain the actual coordinates of the isocenter of the treatment head when the extension bracket is rotated to different angles and the extension bracket is located at different extension positions by controlling the rotation angle of the extension bracket and / or controlling the extension length of the extension bracket, and using an optical measuring instrument; Step S40: By comparing the ideal coordinates of the isocenter of the treatment head with the actual coordinates of the isocenter of the treatment head, the rotation angle that needs to be compensated for the extension bracket and the extension length that needs to be compensated for the extension bracket are calculated.

9. The method for testing the extension bracket of the treatment head according to claim 8, characterized in that: The step S10 comprises: Step S11: adjusting the plane where the connecting plate is located to be perpendicular to the direction of gravity by testing with a level; Step S12: installing the extension bracket on the mounting plate, wherein the support rod supports the lower surface of the extension bracket; Step S13: adjusting the plane where the upper end surface of the end of the extension bracket away from the mounting plate is located to be perpendicular to the direction of gravity by testing with a level meter.

10. The method for testing the extension bracket of the treatment head according to claim 8, characterized in that: The step S20 comprises: Step S21: two target balls are arranged at one end of the extension bracket connected to the mounting plate, and a connecting line of the two target balls is adjusted to be parallel to the extension direction of the extension bracket and a plane where the two target balls are located is adjusted to be perpendicular to the gravity direction by an optical measuring instrument; Step S22: providing an extension tool, setting the extension tool at the front end of the extension bracket, setting a target ball at the front end of the extension tool, setting the target ball at the front end of the extension tool as the isocenter of the treatment head, and fitting the isocenter to the plane where the two target balls in step S21 are located by an optical measuring instrument; Step S23: using an optical measuring instrument to fit the ideal coordinates of the isocenter of the treatment head when the extension bracket is rotated to different angles and the extension bracket is located at different extension positions.

11. The method for testing the extension bracket of the treatment head according to claim 10, characterized in that: The two target balls arranged at one end of the extension bracket connected to the mounting plate include target ball A and target ball B. The target ball arranged at the front end of the extension tooling is target ball C. The distance between target ball A and target ball B is greater than the distance between target ball A and the rotation axis. The extension direction of the line between target ball A and target ball B is the same as the extension direction of the extension bracket. Target ball A and target ball B are not coplanar with target ball C.

Images