Three-sensor measurement method and structure of super-annular float pull-up magnetic levitation system

Abstract

The present invention discloses a three-sensor measurement method and structure for a super-annular float pull-up magnetic levitation system, relating to the field of magnetic levitation technology. The method solves the problem of range-finding sensors on the same horizontal plane as the float in a dipole magnetic confinement fusion device occupying the low-compression ratio confinement area of ​​the plasma. The present invention establishes a float coordinate system at the float's location, translates the float coordinate system vertically upward to obtain a sensor coordinate system, sets three zero-point references for the light emitted by laser range-finding sensors in the sensor coordinate system, measures the distances between the zero-point references and the corresponding projected points in the float coordinate system, and calculates the attitude angle of the float and the distance between the center of the float's upper surface and the sensor. The present invention uses only three vertical laser range-finding sensors to provide feedback signals for the two attitude angles and one suspension distance required for super-annular float suspension control, eliminating the need for laser range-finding sensors on the horizontal plane and leaving low-compression ratio space for fusion energy absorption components.

Description

Technical Field

[0001] The present invention relates to the field of magnetic levitation technology, in particular to a three-sensor measurement method and structure of a super-annular float pull-up magnetic levitation system. Background Art

[0002] The pull-up magnetic levitation of a super-toroidal float is a key technology in dipole magnetic confinement fusion devices. A fundamental requirement for a dipole magnetic confinement fusion device is to simultaneously meet the magnetic field patterns required to suspend and confine the plasma. The distance between the float and the levitation source coil is defined as the levitation distance. The levitation system has two direct requirements: first, the distance between the float and the levitation source must be sufficiently large to provide a sufficiently large magnetic confinement space for the plasma; second, to ensure a sufficiently large plasma high compression ratio region, the ratio of the super-toroidal float's major diameter to its cross-sectional dimensions (such as length, width, or diameter) is generally large, resulting in inherent instability in the super-toroidal float's posture. The proposed levitation system has the following characteristics: First, a coil must be used as the levitation force source, commonly referred to as a lifting coil, to provide sufficient levitation force for long levitation distances. Second, the system incorporates two distinct feedback control loops: one controls the float's levitation distance by adjusting the lifting coil current. The other employs two coil groups, each consisting of two facing coils, called attitude coils, which provide two orthogonal force couples to the float. Adjusting the attitude coil current controls the float's levitation plane perpendicular to gravity. Third, a laser rangefinder must be used to measure the float's levitation distance and attitude to avoid interfering with the physical processes of the plasma within the magnetic confinement chamber. The effect of the plasma's spectral emission on the laser rangefinder has been shown to be negligible in established devices.

[0003] An existing distance measuring sensor configuration of a dipole magnetic confinement fusion device is shown in the attached figure. Figure 1 As shown, the toroidal float has a rounded rectangular cross-section, with its upper and outer cylindrical surfaces serving as laser ranging surfaces. This configuration utilizes five laser ranging sensors. The laser ranging sensor directly above the float is located in a plane perpendicular to gravity and evenly distributed along the same circumference. The three measurements are averaged and used to control the hovering distance. The attitude of the float's upper surface represents the float's attitude, represented by the offset distances of the outer cylindrical surface in two orthogonal horizontal directions. These are measured by laser ranging sensors on the same horizontal plane as the float, used to stabilize the float's attitude. However, the space outside the float's outer cylindrical surface is a low-compression confinement region for the plasma, where components for absorbing fusion energy are located. The two ranging sensors on the horizontal surface occupy this valuable space, increasing the complexity of future fusion power generation devices. Summary of the Invention

[0004] To address the aforementioned issue of existing dipole magnetic confinement fusion devices with range sensors positioned on the same horizontal plane as the float encroaching on the low-compression confinement area of ​​the plasma, this invention proposes a three-sensor measurement method and structure for a toroidal float pull-up magnetic levitation system. This method utilizes only three perpendicular laser range sensors to provide feedback signals for the two attitude angles and one levitation distance required for toroidal float levitation control. This eliminates the need for horizontal laser range sensors, simplifies the device structure, and leaves low-compression space for the fusion energy absorption component.

[0005] The present invention proposes a three-sensor measurement method for a super-ring float pull-up magnetic levitation system. When the upper surface of the float is parallel to the horizontal plane, a rectangular coordinate system X0Y0Z0 is established. The coordinate system takes the center of the float ring structure as the coordinate origin O. The coordinate system X0Y0Z0 is translated along the -Z0 direction to obtain the sensor coordinate system X s Y s Z s ; Define three laser ranging sensors as P1, P2 and P3, the zero point references of the light emitted by P1, P2 and P3 are A, B and C respectively, and point A is at X s The projections of points A, B and C on the coordinate system X0Y0Z0 are A0, B0 and C0 respectively. A0, B0 and C0 are evenly distributed on the mid-diameter circumference of the ring on the upper surface of the float, and A0 is on the X0 axis. AA0, BB0 and CC0 represent the emission light of P1, P2 and P3 respectively.

[0006] Rotate the plane coordinate system X0OY0 counterclockwise along the X0 axis by an angle α to obtain the plane coordinate system X0OY1; rotate the plane coordinate system X0OY1 counterclockwise along the Y1 axis by an angle β to obtain the plane coordinate system X2OY1; the intersection points of the emitted light rays AA0, BB0, CC0 with the plane coordinate system X2OY1 are A2, B2, C2 respectively; use Δz AC It represents the difference between the distances measured by sensors P1 and P3, that is, In the formula is the distance from point A to point A2, is the distance from point C to point C2; use Δz BC It represents the difference between the distances measured by sensors P2 and P3, that is, In the formula is the distance from point B to point B2, is the distance from point C to point C2; attitude angles α and β, and the distance from the center O of the float upper surface to the sensor zero point reference plane X s O s Y s The distance d is calculated as follows:

[0007]

[0008] Where r is the radius of the mid-diameter circle on the upper surface of the float.

[0009] A sensor configuration structure adopts the three-sensor measurement method of the super-annular float pulling up magnetic levitation system mentioned above, which specifically includes a frame, three laser ranging sensors, a float, several coils and a central column. The central column is arranged at the center of the frame, and the float is mounted on the central column; the several coils include a lifting coil and four attitude coils, the lifting coil is arranged at the upper end of the frame, and the attitude coil is arranged on the side of the frame; the laser ranging sensor is arranged at the upper end of the lifting coil, and the light emitted by the laser ranging sensor passes through the center of the lifting coil to measure the distance of the float.

[0010] Furthermore, the frame includes a skeleton, an upper plate and a lower plate, the upper end of the skeleton is provided with an upper plate, and the lower end is provided with a lower plate; the upper end of the center column is connected to the upper plate, and the lower end is connected to the lower plate; the upper surface of the upper plate is provided with a lifting coil.

[0011] Furthermore, the upper plate is made of a transparent material and is provided with a through hole corresponding to the laser emission position of the laser ranging sensor.

[0012] Furthermore, an upper clamping plate is provided at the upper end of the lifting coil, and a lower clamping plate is provided at the lower end; the upper clamping plate and the lower clamping plate are clamped to the lifting coil by bolts and fixed to the upper plate.

[0013] Furthermore, the laser ranging sensor is arranged on the upper clamping plate through an L-shaped folding plate.

[0014] Furthermore, the frame, the upper splint, the lower splint and the L-shaped folding plate are made of aluminum.

[0015] Furthermore, buffer pads are provided at the upper and lower ends of the central column.

[0016] Furthermore, the buffer pad includes an upper buffer pad, the upper buffer pad includes an annular body, and three conical protrusion structures are evenly distributed on the circumference of the annular body.

[0017] Furthermore, the buffer pad is made of silicone and the center column is made of Teflon.

[0018] The beneficial effects of the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention are:

[0019] (1) The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention overcomes the problem that the distance measuring sensors on the same horizontal plane as the float in the existing dipole magnetic confinement fusion device occupy the low compression ratio confinement area of ​​the plasma. By arranging a lifting coil above the frame to provide the float with levitation force, the attitude coils arranged around the frame are used to control the levitation attitude of the float. Only three vertical laser distance measuring sensors arranged on the lifting coil can provide feedback signals of two attitude angles and one levitation distance required for the super-annular float levitation control, eliminating the need for the laser distance measuring sensor on the same horizontal plane as the float, avoiding the situation of encroaching on the low compression ratio confinement area of ​​the plasma, and leaving the low compression ratio space for the fusion energy absorption component.

[0020] (2) The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention prevents the float from being ejected under the action of electromagnetic force due to incorrect current polarity, causing damage to the float and surrounding equipment due to collision, thereby avoiding harm to experimental personnel; at the same time, the upper buffer pad with a special shape and installation angle ensures that it can buffer the impact of the float without blocking the reflected light path of the laser ranging sensor;

[0021] (3) The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention ensures that the emitted light of the laser ranging sensor can reach the upper surface of the float without obstruction and reflection through the through hole set on the upper plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] In the attached figure:

[0024] Figure 1 This is a schematic diagram of the configuration structure of five ranging sensors of the dipole magnetic confinement fusion device suspension system described in the background technology of the present invention;

[0025] Figure 2 This is a schematic diagram of the configuration structure of three ranging sensors used in the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention;

[0026] Figure 3 This is a diagram of the zero-point reference plane coordinate system of the laser ranging sensor and the float coordinate system of the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention;

[0027] Figure 4This is a diagram of the zero-point reference plane coordinate system of the laser ranging sensor and the first-rotation float coordinate system of the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention;

[0028] Figure 5 This is a diagram of the zero-point reference plane coordinate system of the laser ranging sensor and the second-rotation float coordinate system of the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the three-sensor configuration structure of a super-annular float pull-up magnetic levitation system according to the present invention;

[0030] Figure 7 This is a top view of the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to the present invention;

[0031] Figure 8 This is a side view of a three-sensor configuration structure of a super-annular float pull-up magnetic levitation system according to the present invention;

[0032] Figure 9 This is a schematic diagram of the coordinated structure of the central column, float and buffer pad of the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention;

[0033] Figure 10 This is a top perspective view of an upper plate and an upper buffer pad of a three-sensor configuration structure of a super-annular float pull-up magnetic levitation system according to the present invention;

[0034] Figure 11 This is a distance measurement principle diagram of a laser distance measurement sensor with a three-sensor configuration structure in a super-annular float pull-up magnetic levitation system according to the present invention;

[0035] Wherein: 1-frame, 2-laser ranging sensor, 3-float, 4-lifting coil, 5-attitude coil, 6-upper plate, 6a-through hole one, 6b-through hole two, 6c-through hole three, 7-lower plate, 8-semi-round head bolt, 9-upper clamping plate, 10-lower clamping plate, 11-bolt and nut kit one, 12-L-shaped folding plate, 13-bolt and nut kit two, 14-pressing plate, 15-bolt and nut kit three, 16-center column, 17-lower buffer pad, 18-upper buffer pad, 19-ranging reference plane, 20-reflected light receiving area, 21-emitted light, 22-reflected light, 23-measured surface. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Specific implementation method 1: See Figures 1-11 In order to reduce the complexity of future dipole magnetic confinement fusion power generation devices, the present invention uses only three vertical laser ranging sensors 2 to provide the suspension system with all the feedback signals required for suspension distance and attitude control, such as Figure 2 shown.

[0041] In principle, through mathematical coordinate transformation, it is sufficient for three reasonably configured distance measuring sensors to provide three degrees of freedom feedback signals. Figures 3 to 5 The configuration method of the laser ranging sensor 2 and the principle of coordinate transformation are described. In this embodiment, a three-sensor measurement method for a super-ring float pull-up magnetic levitation system is described. When the upper surface of the float 3 is parallel to the horizontal plane, a rectangular coordinate system X0Y0Z0 is established. The coordinate system takes the center of the circular structure of the float 3 as the coordinate origin O; the coordinate system X0Y0Z0 is translated along the -Z0 direction to obtain the sensor coordinate system Xs Y s Z s ; Define three laser ranging sensors 2 as P1, P2 and P3, the zero point references of the light emitted by P1, P2 and P3 are A, B and C respectively, and point A is at X s The projections of points A, B, and C on the coordinate system X0Y0Z0 are A0, B0, and C0 respectively. A0, B0, and C0 are evenly distributed on the mid-diameter circumference of the ring on the upper surface of float 3, with A0 on the X0 axis. AA0, BB0, and CC0 represent the emitted light rays of P1, P2, and P3 respectively.

[0042] Rotate the plane coordinate system X0OY0 counterclockwise along the X0 axis by an angle α to obtain the plane coordinate system X0OY1; rotate the plane coordinate system X0OY1 counterclockwise along the Y1 axis by an angle β to obtain the plane coordinate system X2OY1; the intersection points of the emitted light rays AA0, BB0, CC0 with the plane coordinate system X2OY1 are A2, B2, C2 respectively; use Δz AC It represents the difference between the distances measured by sensors P1 and P3, that is, In the formula is the distance from point A to point A2, is the distance from point C to point C2; use Δz Bc It represents the difference between the distances measured by sensors P2 and P3, that is, In the formula is the distance from point B to point B2, is the distance from point C to point C2; attitude angles α and β, and the distance from the center O of the upper surface of the float (3) to the sensor zero point reference plane X s O s Y s The distance d is calculated as follows:

[0043]

[0044] Where r is the radius of the mid-diameter circle on the upper surface of the float (3).

[0045] A sensor configuration structure using the three-sensor measurement method of the above-mentioned super-annular float pull-up magnetic levitation system specifically includes a frame 1, three laser ranging sensors 2, a float 3, a plurality of coils and a central column 16. The central column 16 is provided at the center of the frame 1. The upper end of the central column 16 is connected to the upper end of the frame 1, and the lower end of the central column 16 is connected to the lower end of the frame 1. The float 3 is sleeved on the central column 16; the central column 16 is made of Teflon and has a diameter smaller than the inner diameter of the float 3; the plurality of coils include a lifting coil 4 and four attitude coils 5. The lifting coil 4 is provided at the upper end of the frame 1, and the attitude coil 5 is connected to the upper end of the frame 1 through a pressure plate. 14 and bolt and nut kit three 15 are arranged on the four sides of the frame 1, and the horizontal center plane of the attitude coil 5 coincides with the axial center plane of the float 3, so that the attitude coil 5 can provide a larger attitude correction torque for the float 3 with a smaller current; the laser ranging sensors 2 are evenly distributed on the upper end of the lifting coil 4, and the three laser ranging sensors 2 are arranged in an equilateral triangle in the central annular area of ​​the lifting coil 4. The light emitted by the laser ranging sensor 2 passes through the center of the lifting coil 4 and is projected onto the upper surface of the float 3. The laser ranging sensor 2 receives the reflected light, thereby measuring the distance of the float 3.

[0046] The frame 1 includes a skeleton, an upper plate 6 and a lower plate 7. The upper end of the skeleton is provided with an upper plate 6, and the lower end is provided with a lower plate 7, which are connected and fixed by eight groups of semicircular head bolts 8; the upper end of the center column 16 is connected to the upper plate 6, and the lower end is connected to the lower plate 7; a lifting coil 4 is provided on the upper surface of the upper plate 6; the skeleton is an aluminum profile skeleton structure, and the upper plate 6 and the lower plate 7 are both transparent acrylic plates.

[0047] The upper plate 6 is provided with through holes corresponding to the laser emission position of the laser ranging sensor 2. Through hole 1 6a, through hole 2 6b and through hole 3 6c are evenly distributed around the circumference, and the centers of the three through holes are located on the mid-diameter circumference of the ring on the upper surface of the float 3 in the float coordinate system. The through holes ensure that the emitted light of the laser ranging sensor 2 can reach the upper surface of the float without obstruction or reflection. The projection of through hole 1 6a in the sensor coordinate system is X s On axis.

[0048] The upper end of the lifting coil 4 is provided with an upper clamping plate 9, and the lower end is provided with a lower clamping plate 10; the upper clamping plate 9 and the lower clamping plate 10 are clamped and fixed to the upper plate 6 by a bolt and nut kit 11 to the lifting coil 4.

[0049] The laser ranging sensor 2 is arranged on the upper clamping plate 9 through the L-shaped folding plate 12 and the bolt and nut kit 13, so that the laser ranging sensor 2 is suspended above the central annular area of ​​the lifting coil 4, and the emitted light and reflected light of the laser ranging sensor 2 will not be blocked.

[0050] The upper clamping plate 9 , the lower clamping plate 10 and the L-shaped folding plate 12 are made of aluminum.

[0051] Buffer pads are provided at the upper and lower ends of the central column 16 , and the buffer pads are made of silicone.

[0052] The buffer pad includes a lower buffer pad 17 and an upper buffer pad 18. The lower buffer pad 17 is an annular structure and is arranged at the lower end of the center column 16, and the upper buffer pad 18 is arranged at the upper end of the center column 16; the upper buffer pad 18 includes an annular body, and three conical protrusion structures are evenly distributed on the circumference of the annular body, and the heads of the conical protrusion structures are arc structures; when the upper buffer pad 18 is installed, it avoids the through hole 1 6a, the through hole 2 6b and the through hole 3 6c on the upper plate 6 to ensure that the emitted light and the reflected light of the laser ranging sensor 2 are not blocked.

[0053] The float 3 utilizes a toroidal permanent magnet with a rounded rectangular cross-section. Using a toroidal permanent magnet with a rounded rectangular cross-section instead of a superconducting coil differs in that the dipole magnetic field lines pass through the permanent magnet itself, making it unsuitable for confining plasma, as the plasma would be completely impacted by the magnetic field lines. This does not affect the effectiveness of demonstrating the three-range sensor configuration in a suspension control system. The three-range sensor configuration described in this invention fully meets the requirements of a suspension control system.

[0054] Summarizing the above implementation cases, the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention overcomes the problem that the ranging sensors on the same horizontal plane as the float in the existing dipole magnetic confinement fusion device occupy the low compression ratio confinement area of ​​the plasma. A lifting coil 4 is arranged above the frame 1 to provide a suspension force for the float 3, and the suspension attitude of the float 3 is controlled by the attitude coil 5 arranged around the frame 1; three laser ranging sensors 2 are arranged on the lifting coil 4 to measure the attitude angle and suspension distance of the float 3, eliminating the laser ranging sensor 2 on the same horizontal plane as the float 3, avoiding the situation of encroaching on the low compression ratio confinement area of ​​the plasma, and leaving the low compression ratio space for the fusion. Variable energy absorbing component; the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention, through the provided buffer pad, prevents the float 3 from being ejected under the action of the electromagnetic force due to the wrong current polarity, causing the float 3 and the surrounding equipment to be damaged due to collision, thereby avoiding injury to the experimenter; at the same time, the upper buffer pad 18 with a special shape and installation angle makes it have the function of buffering the impact of the float 3 while not blocking the reflected light path of the laser ranging sensor 2; the three-sensor configuration structure of the super-annular float pull-up magnetic levitation system described in the present invention, through the through hole provided on the upper plate 6, ensures that the emitted light of the laser ranging sensor 2 can reach the upper surface of the float 3 without obstruction and reflection.

[0055] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the invention. Reasonable combinations of the features described in the above embodiments are also possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A three-sensor measurement method for a toroidal float pull-up magnetic levitation system, characterized by: When the upper surface of the float (3) is parallel to the horizontal plane, a rectangular coordinate system X0Y0Z0 is established, and the coordinate system takes the center of the circular ring structure of the float (3) as the coordinate origin O; the coordinate system X0Y0Z0 is translated along the -Z0 direction to obtain the sensor coordinate system X s Y s Z s ; Define three laser distance measuring sensors (2) as P1, P2 and P3, the zero point references of the light emitted by P1, P2 and P3 are A, B and C respectively, and point A is at X s The projections of points A, B and C on the coordinate system X0Y0Z0 are A0, B0 and C0 respectively. A0, B0 and C0 are evenly distributed on the mid-diameter circumference of the ring on the upper surface of the float (3), and A0 is on the X0 axis. AA0, BB0 and CC0 represent the emitted light rays of P1, P2 and P3 respectively. Rotate the plane coordinate system X0OY0 counterclockwise along the X0 axis by an angle α to obtain the plane coordinate system X0OY1; rotate the plane coordinate system X0OY1 counterclockwise along the Y1 axis by an angle β to obtain the plane coordinate system X2OY1; the intersection points of the emitted light rays AA0, BB0, CC0 with the plane coordinate system X2OY1 are A2, B2, C2 respectively; use Δz AC It represents the difference between the distances measured by sensors P1 and P3, that is, In the formula is the distance from point A to point A2, is the distance from point C to point C2; use Δz BC represents the difference between the distances measured by sensors P2 and P3, i.e. In the formula is the distance from point B to point B2, is the distance from point C to point C2; attitude angles α and β, and the distance from the center O of the upper surface of the float (3) to the sensor zero point reference plane X s O s Y s The distance d is calculated as follows: Where r is the radius of the mid-diameter circle on the upper surface of the float (3).

2. A sensor configuration structure using the three-sensor measurement method of the toroidal float pull-up magnetic levitation system according to claim 1, characterized in that: The invention comprises a frame (1), three laser distance measuring sensors (2), a float (3), a plurality of coils and a central column (16); a central column (16) is provided at the center of the frame (1), and a float (3) is sleeved on the central column (16); the plurality of coils comprises a lifting coil (4) and four attitude coils (5); the lifting coil (4) is provided at the upper end of the frame (1), and the attitude coil (5) is provided at the side of the frame (1); the laser distance measuring sensor (2) is provided at the upper end of the lifting coil (4), and light emitted by the laser distance measuring sensor (2) passes through the center of the lifting coil (4) to measure the distance of the float (3).

3. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 2 is characterized by: The frame (1) comprises a skeleton, an upper plate (6) and a lower plate (7); the upper end of the skeleton is provided with the upper plate (6), and the lower end is provided with the lower plate (7); the upper end of the central column (16) is connected to the upper plate (6), and the lower end is connected to the lower plate (7); and the upper surface of the upper plate (6) is provided with a lifting coil (4).

4. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 3 is characterized by: The upper plate (6) is made of a transparent material and is provided with a through hole corresponding to the laser emission position of the laser ranging sensor (2).

5. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 3 is characterized by: The upper end of the lifting coil (4) is provided with an upper clamping plate (9), and the lower end is provided with a lower clamping plate (10); the upper clamping plate (9) and the lower clamping plate (10) are clamped to the lifting coil (4) by bolts and fixed to the upper plate (6).

6. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 5 is characterized in that: The laser distance measuring sensor (2) is arranged on the upper clamping plate (9) via an L-shaped folding plate (12).

7. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 6 is characterized in that: The frame, the upper clamping plate (9), the lower clamping plate (10) and the L-shaped folding plate (12) are made of aluminum.

8. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 2 is characterized in that: Buffer pads are provided at the upper and lower ends of the central column (16).

9. The three-sensor configuration structure of the toroidal float pull-up magnetic levitation system according to claim 8 is characterized in that: The buffer pad comprises an upper buffer pad (18), which comprises an annular body, and three conical protrusion structures are evenly distributed on the circumference of the annular body.

10. The three-sensor configuration structure of the super-annular float pull-up magnetic levitation system according to claim 9 is characterized in that: The material of the buffer pad is silica gel, and the material of the central column (16) is Teflon.

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