Magnetic field intensity enhancement generating device

Abstract

The invention provides a magnetic field intensity enhancement generating device. The device comprises a center permanent magnet, an edge permanent magnet array distributed in the circumferential direction and a fixing device. The center permanent magnet and the edge permanent magnets are fixedly installed on the fixing device, the NS pole connecting line of the center permanent magnet is coaxial with the axis of the edge permanent magnet array structure, and the south and north magnetic poles of the center permanent magnet and the south and north magnetic poles of the edge permanent magnets face the same direction. Therefore, a constant focusing magnetic field with improved intensity is generated. According to the invention, the plurality of permanent magnets are designed according to a specific space structure and distribution rule, the magnetic field intensity is enhanced, regulated and controlled by using the superimposed effect of the magnetic field of the permanent magnets, the limitation that the magnetic field intensity of a single permanent magnet is limited is broken through, and a high-intensity focusing magnetic field can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a magnetic field strength enhancement generating device and a use method thereof. Background Art

[0002] During magnetic controlled surgery, a magnetic field device is required to precisely control the magnetic guide wire / catheter or magnetic material in the body, so that the magnetic catheter / guide wire or magnetic material can accurately enter specific blood vessels, trachea and other cavities or pipes under the control of an external magnetic field for magnetic controlled interventional diagnosis or treatment.

[0003] In order to achieve magnetic control intervention, a high-intensity magnetic field device is required. The main ways to generate a magnetic field are based on an electromagnet and based on a permanent magnet. The magnetic field method using an electromagnet uses multiple energized spiral tubes (such as Helmholtz coils) assembled according to a certain structure and configuration. By controlling the alternating current signal in the coil, an oscillating or rotating magnetic field can be generated; however, the electromagnetic field-based method has the disadvantages of high heat generation and large size. With the Helmholtz coil method, the magnetic field operation space is located inside the magnetic field device, and the operation space is very limited.

[0004] Patent CN 113595352 A has disclosed a device in which a central permanent magnet located at an intersection is driven by evenly distributed, tilted electromagnets, and the electromagnets are used to generate a dynamic driving magnetic field to drive the central permanent magnet to rotate, thereby generating a driving magnetic field; in this device, the center of the central permanent magnet is located at the intersection of the electromagnets placed tilted in a positive cone, and the NS poles of the central permanent magnet are placed horizontally. This setting will interact with the magnetic field of the evenly distributed, tilted electromagnets, making it difficult to generate a high-intensity magnetic field for magnetically controlled interventional surgery.

[0005] Based on the magnetic field driving method of permanent magnets, a robot or manual device is used to drive a central magnet, a cylindrical magnet, or a long strip magnet. By adjusting the position, orientation, and magnetic field direction of the magnet and the target position, the magnetic field strength and direction of the target position are regulated. However, the magnetic field strength of a single permanent magnet is limited, and the farther away from the magnet, the smaller the magnetic field strength; and large-volume permanent magnets are difficult to prepare and costly. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a device for enhancing the magnetic field strength, so as to solve the technical problems in the prior art that the magnetic field strength of a single permanent magnet is limited, and the farther away from the magnet, the smaller the magnetic field strength; and the permanent magnets of large volume are difficult to prepare and the cost is high.

[0007] In order to achieve the above technical objectives, in a first aspect, the technical solution of the present invention provides a magnetic field strength enhancement generating device, comprising:

[0008] A central permanent magnet, a circumferentially distributed edge permanent magnet array, and a fixing device;

[0009] The central permanent magnet and the edge permanent magnets are fixedly mounted on the fixing device, the NS pole line of the central permanent magnet is coaxial with the axis of the edge permanent magnet array structure, and the north and south poles of the central permanent magnet and the north and south poles of the edge permanent magnets are facing the same direction to generate a constant focusing magnetic field with enhanced intensity.

[0010] Compared with the prior art, the beneficial effects of the present invention include: by designing a number of permanent magnets according to a specific spatial structure and distribution law, a high-intensity magnetic field is formed. The superposition effect of the permanent magnet magnetic field is used to enhance and regulate the magnetic field strength, breaking through the limitation of the limited magnetic field strength of a single permanent magnet, and realizing a high-intensity focused magnetic field. Compared with electromagnets, permanent magnets do not require current supply, the equipment generates less heat and consumes less energy, and at the same time, the operating space is larger, the difficulty and cost of equipment manufacturing are reduced, and it is suitable for magnetic control interventional surgery, such as vascular interventional navigation and other complex interventional operations. The magnetic field device is combined with a robot system, and magnetic control can be used to assist interventional diagnosis or surgical treatment.

[0011] According to some embodiments of the present invention, the center of gravity points or the center of the geometric structure of the plurality of edge permanent magnets are on the same plane, and the plane where the edge permanent magnet array is located intersects perpendicularly with the NS pole connection line of the central permanent magnet.

[0012] According to some embodiments of the present invention, the NS polar axis of each edge permanent magnet is inclined at a preset angle to the NS polar axis of the central permanent magnet and intersects at a point, and the NS polar axis of each permanent magnet in the circumferentially distributed edge permanent magnet array is at an angle of 5° to 85° with the horizontal direction.

[0013] According to some embodiments of the present invention, the inclined edge permanent magnets have a consistent inclination angle, and the angle between the inclination angle of the edge permanent magnet and the horizontal direction is 5° to 85°.

[0014] According to some embodiments of the present invention, the center of the central permanent magnet is located on the axis of the plurality of edge permanent magnet arrays, and the center of the central permanent magnet is located below the intersection of the NS polar axes of the circumferentially distributed edge permanent magnet arrays, and the center of the central permanent magnet is located above the plane where the center of the circumferential permanent magnet array is located.

[0015] According to some embodiments of the present invention, the number K of the edge permanent magnets is ≥2, and the edge permanent magnets and their inclination angles are circumferentially symmetrically distributed around the NS polar axis of the central permanent magnet.

[0016] According to some embodiments of the present invention, the shapes of the central permanent magnet and the individual magnets in the circumferentially distributed permanent magnet array are a combination of one or more shapes such as a sphere, a spherical segment, a cylinder, a cone, a truncated cone, a pyramid, a prism, and a cube.

[0017] In the second aspect, the technical solution of the present invention provides a method for using a magnetic field strength enhancement generating device, by adjusting the spatial position and posture of the magnetic field strength enhancement generating device described in any one of the first aspects, thereby changing the size and direction of the magnetic field at a preset point in the operating space.

[0018] According to some embodiments of the present invention, the magnetic field strength enhancement generating device is installed on a surgical robot or a manual device, and the surgical robot or the manual device is used to adjust the position and posture of the magnetic field strength enhancement generating device in space.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein the abstract drawings are identical to one of the drawings in the specification:

[0021] Figure 1 A structural diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention;

[0022] Figure 2 A diagram showing the NS pole connection structure of a magnetic field strength enhancement generating device provided by one embodiment of the present invention;

[0023] Figure 3 A bidirectional NS pole connection structure diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention;

[0024] Figure 4 A structural diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention;

[0025] Figure 5 A structural diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention;

[0026] Figure 6 A magnetic flux line diagram of a magnetic field intensity enhancement generating device provided by one embodiment of the present invention;

[0027] Figure 7 A magnetic field intensity diagram of z=30 mm for a magnetic field intensity enhancement generating device provided by one embodiment of the present invention;

[0028] Figure 8 A diagram of the simulated and measured magnetic field strength of a magnetic field strength enhancement generating device provided by one embodiment of the present invention;

[0029] Fig. 9 A comparison diagram of the magnetic field strength of the central axis of the magnetic field strength enhancement generating device provided by one embodiment of the present invention and that of the comparative patent;

[0030] Fig.10 A comparison diagram of the magnetic field strength enhancement generating device provided by one embodiment of the present invention and the magnetic field strength of z=70mm of a comparative patent;

[0031] Description of reference numerals: central permanent magnet 101 , edge permanent magnet 102 , fixing device 103 . DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] It should be noted that, although the functional modules are divided in the system schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the system or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0034] Reference Figures 1 to 10 , Figure 1 A structural diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention; Figure 2 A diagram showing the NS pole connection structure of a magnetic field strength enhancement generating device provided by one embodiment of the present invention; Figure 3 A bidirectional NS pole connection structure diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention; Figure 4 A structural diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention; Figure 5 A structural diagram of a magnetic field strength enhancement generating device provided by one embodiment of the present invention; Figure 6 A magnetic flux line diagram of a magnetic field intensity enhancement generating device provided by one embodiment of the present invention; Figure 7 A magnetic field intensity diagram of z=30 mm for a magnetic field intensity enhancement generating device provided by one embodiment of the present invention; Figure 8 A diagram of the simulated and measured magnetic field strength of a magnetic field strength enhancement generating device provided by one embodiment of the present invention; Fig. 9A comparison diagram of the magnetic field strength of the central axis of the magnetic field strength enhancement generating device provided by one embodiment of the present invention and that of the comparative patent; Fig.10 A comparison diagram of the magnetic field strength enhancement generating device provided by one embodiment of the present invention and the magnetic field strength of z=70mm of a comparative patent;

[0035] In one embodiment, the magnetic field strength enhancement generating device comprises: a central permanent magnet 101, an array of circumferentially distributed edge permanent magnets 102, and a fixing device 103;

[0036] The central permanent magnet 101 and the edge permanent magnets 102 are fixedly mounted on the fixing device 103, the NS pole line of the central permanent magnet 101 is coaxial with the axis of the array structure of the edge permanent magnets 102, and the north and south poles of the central permanent magnet 101 and the north and south poles of the edge permanent magnets 102 are facing the same direction to generate a constant focusing magnetic field with enhanced intensity.

[0037] The north and south magnetic poles of the central permanent magnet 101 and the edge permanent magnet 102 are facing the same direction, and the magnetic fields generated by them are superimposed at the convergence point, which can produce a constant focused magnetic field with increased strength. This increase in magnetic field strength is conducive to carrying out work that requires high magnetic field strength in a specific area. For example, in some application scenarios such as magnetic separation and magnetic resonance imaging, high-intensity magnetic fields can improve the working efficiency and accuracy of equipment.

[0038] The device generates a constant focused magnetic field, which is of great significance in some experiments or industrial production processes that require high magnetic field stability. For example, in the magnetic detection of materials, a stable magnetic field can ensure the accuracy and repeatability of the detection results.

[0039] By using permanent magnets, the central permanent magnet 101 and the circumferential edge permanent magnet 102 array are fixedly installed on the fixing device 103, and the permanent magnet device is designed through a specific geometric structure so that the magnetic field is concentrated and strengthened in a specific area, thereby generating a high-intensity constant focused magnetic field. Through the arrangement of the characteristic permanent magnets and the design of the fixing device 103, the magnetic energy of the permanent magnets can be maximized and unnecessary losses can be reduced. In particular, through the combination of small-volume permanent magnets, the magnetic field strength generated can be much higher than the magnetic field strength generated by the large-volume permanent magnets of small-volume permanent magnets, which effectively improves the magnetic field performance; compared with traditional electromagnets, permanent magnets do not require current supply, the equipment generates less heat, consumes less energy, and has a compact structure, which is suitable for scenes requiring high-intensity magnetic fields.

[0040] Furthermore, the center of gravity or the center of the geometric structure of the plurality of edge permanent magnets 102 are on the same plane, and the plane where the edge permanent magnet 102 array is located intersects perpendicularly with the NS pole connection line of the central permanent magnet.

[0041] Further, the NS polar axis of each central permanent magnet 102 is inclined to the NS polar axis of the central permanent magnet 101 at a preset angle and intersects at one point, and the NS polar axis of each permanent magnet in the circumferentially distributed edge permanent magnet array is at an angle of 5° to 85° with the horizontal direction, such as 5°, 15°, 30°, 45°, 60°, 70°, 80° or 85°.

[0042] Furthermore, the tilted edge permanent magnets 102 have consistent tilted angles, and the included angle between the tilted edge permanent magnets 102 and the horizontal direction is 5° to 85°, such as 5°, 15°, 30°, 45°, 60°, 70°, 80° or 85°.

[0043] Furthermore, the center of the central permanent magnet 101 is located on the axis of the multiple central permanent magnet arrays 102, and the center of the central permanent magnet 101 is located below the intersection of the NS polar axes of the circumferentially distributed central permanent magnet arrays 102, and the center of the central permanent magnet 101 is located above the plane where the center of the circumferential permanent magnet array is located.

[0044] Furthermore, the number K of the central permanent magnets 102 is ≥2, and the central permanent magnets 102 and their inclination angles are circumferentially symmetrically distributed around the NS polar axis of the central permanent magnet 101 .

[0045] The shape of the central permanent magnet 101 is any one of the following: sphere, spherical segment, cylinder, cone, truncated cone, pyramid, prism, cube, and the shape of the edge permanent magnet 102 is any one of the following: sphere, spherical segment, cylinder, cone, truncated cone, pyramid, prism, cube. A preferred embodiment is that the edge permanent magnet 102 is cylindrical and the central permanent magnet 101 is sphere.

[0046] The magnetic field device proposed in the present invention can generate a high-intensity focusing magnetic field using a small-volume permanent magnet. The aforementioned patent CN 113595352 A (hereinafter referred to as the aforementioned patent) has proposed a magnetic field device with a similar geometric shape. However, the magnetic field device proposed in the present invention and the aforementioned patent (CN 113595352A) have the following differences in design principle and actual effect:

[0047] (1) The circumferential magnets of the present invention are permanent magnets, while the circumferential magnets in the aforementioned patents are electromagnets;

[0048] (2) The central permanent magnet 101 in the present invention is fixed and cooperates with the circumferential permanent magnets to generate a high-intensity constant magnetic field; however, the central permanent magnet 101 in the aforementioned patent is movable and rotates under the drive of the circumferential permanent magnets, and a changing magnetic field is generated by the rotation of the central permanent magnet 101;

[0049] (3) The NS line of the central permanent magnet 101 of the present invention coincides with the axis of the magnetic field device. However, the NS pole of the central permanent magnet 101 in the aforementioned patent is placed horizontally and perpendicular to the axis of its magnetic field device.

[0050] (4) The position of the central permanent magnet 101 of the present invention is between the intersection of the NS poles of the circumferential permanent magnets and the plane where the circumferential permanent magnet array is located, so that the magnetic fields of the circumferential permanent magnets and the central permanent magnet 101 reinforce each other to form a high-intensity magnetic field. However, the central permanent magnet 101 in the aforementioned patent is located at the intersection of the NS poles of the circumferential electromagnets, resulting in the mutual interference of the magnetic fields of the central permanent magnet 101 and the circumferential electromagnets, resulting in a low-intensity magnetic field, whose magnetic field strength (at the same size) is much lower than the magnetic field strength of the present invention.

[0051] (5) The magnetic field device of the present invention can generate a focused symmetrical magnetic field, and the direction of the resultant magnetic field is along the axis of the magnetic field device. However, the magnetic field generated by the aforementioned patent is a non-focused, asymmetrical magnetic field, and the direction of the resultant force of the magnetic field is inclined to the axis of the magnetic field device.

[0052] (6) The magnetic field device of the present invention can generate a constant magnetic field, and the direction of the resultant magnetic field is always along the axis of the magnetic field device. However, in the aforementioned patent, since the central permanent magnet 101 (NS pole horizontal mode) is constantly rotating under the action of the circumferential electromagnet, its magnetic field is a variable magnetic field, and the direction of the resultant magnetic field is always changing.

[0053] (7) The magnetic field device of the present invention can generate a high-intensity, focused, symmetrical, constant, high-intensity magnetic field. The combined field strength direction of the magnetic field device is fixed, which is convenient for robot operation and can be used for magnetic control interventional surgery. The magnetic field generated by the aforementioned patent (under the same size) is a low-intensity, non-focused, asymmetrical, low-intensity magnetic field with dynamically changing combined magnetic field direction. Its asymmetry and dynamic change characteristics make it difficult to use in magnetic control interventional surgery.

[0054] By installing the magnetic field strength enhancement device on a five-axis platform, and the five-axis platform has multiple adjustable components, such as a height adjustment device, a lateral adjustment device, and a longitudinal adjustment device, and the first and second angle platforms can rotate in different directions, the magnetic field strength enhancement device can be finely adjusted in multiple dimensions (including spatial position and angle). This can ensure that the relative position and angle between the device and the lesion or target point can accurately adapt to different surgical scenarios and the specific posture requirements of the patient, which helps to accurately apply the magnetic field to the lesion or target point, and maximize the magnetic field enhancement effect.

[0055] Accurate magnetic field positioning and appropriate customization of magnetic field conditions can help to better play the positive role of the magnetic field in surgery, such as enhancing the visibility of the surgical site (if the magnetic field has relevant auxiliary observation functions), promoting tissue repair or improving the accuracy of surgical operations, etc., ultimately improving the effect of the surgery and facilitating the patient's postoperative recovery.

[0056] In addition, an embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are executed by a processor or controller, for example, by a processor in the above-mentioned terminal embodiment, so that the above-mentioned processor can execute the method of using the magnetic field strength enhancement generating device in the above-mentioned embodiment.

[0057] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0058] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

[0059] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A magnetic field strength enhancement generating device, characterized in that: include: A central permanent magnet, a circumferentially distributed edge permanent magnet array, and a fixing device; The central permanent magnet and the edge permanent magnets are fixedly mounted on the fixing device, the NS pole line of the central permanent magnet is coaxial with the axis of the edge permanent magnet array structure, and the north and south poles of the central permanent magnet and the north and south poles of the edge permanent magnets are facing the same direction to generate a constant focusing magnetic field with enhanced intensity.

2. The magnetic field strength enhancement generating device according to claim 1, characterized in that: The center of gravity points or the center of the geometric structure of the plurality of edge permanent magnets are on the same plane, and the plane where the edge permanent magnet array is located intersects perpendicularly with the NS pole connection line of the central permanent magnet.

3. The magnetic field strength enhancement generating device according to claim 1 or 2, characterized in that: The NS polar axis of each edge permanent magnet is inclined to the NS polar axis of the central permanent magnet at a preset angle and intersects at one point. The angle between the NS polar axis of each permanent magnet in the circumferentially distributed permanent magnet array and the horizontal direction is 5° to 85°.

4. The magnetic field strength enhancement generating device according to claim 1 or 2, characterized in that: The center of the central permanent magnet is located on the axis of the plurality of edge permanent magnet arrays, and the center of the central permanent magnet is located below the intersection of the NS polar axes of the circumferentially distributed edge permanent magnet arrays, and the center of the central permanent magnet is located above the plane where the center of the circumferential permanent magnet array is located.

5. The magnetic field strength enhancement generating device according to claim 1 or 2, characterized in that: The number of the edge permanent magnets K is ≥ 2, and the edge permanent magnets and their inclination angles are symmetrically distributed around the NS polar axis of the central permanent magnet.

6. The magnetic field strength enhancement generating device according to claim 1 or 2, characterized in that: The shapes of the central permanent magnet and the individual magnets in the circumferentially distributed permanent magnet array are one or more combinations of the shapes of sphere, spherical segment, cylinder, cone, truncated cone, pyramid, prism, cube, etc.

7. A method for using a magnetic field strength enhancement generating device, characterized in that: By adjusting the spatial position and posture of the magnetic field strength enhancement generating device described in any one of claims 1 to 6, the size and direction of the magnetic field at a preset point in the operating space are changed.

8. The method for using the magnetic field strength enhancement generating device according to claim 7, characterized in that: The magnetic field strength enhancement generating device is installed on a surgical robot or a manual device, and the surgical robot or the manual device is used to adjust the position and posture of the magnetic field strength enhancement generating device in space.

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