Magnetic torque measuring device and magnetic torque measuring method

Abstract

The invention discloses a magnetic torque measuring device and a magnetic torque measuring method, and relates to the technical field of implanted medical device detection. The measuring device comprises a base, a frame assembly, a carrying table and a balancing device, wherein the base is provided with a first circular scale; the frame assembly is rotatably connected with the base and comprises an outer frame and a first pointer fixed relative to the outer frame, the outer frame comprises an inner cavity and a bottom plate, and the first pointer points to the first circular scale; the carrying table is arranged in the inner cavity and is rotatably connected with the bottom plate, and the carrying table comprises a carrying disc for fixing an object to be detected; the balancing device comprises two wire fixers fixed relative to the frame assembly and elastic pieces connected between the wire fixers and the carrying table, and the directions of moments applied to the carrying disc by the two elastic pieces are opposite. The elastic pieces are connected with the line fixer and the carrying table, so that the elastic pieces with different elasticity coefficients can be replaced conveniently, and different torsions can be measured; in addition, the frame assembly is rotatably connected with the base, so that the torsion of the to-be-measured object at different angles can be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of implantable medical device detection, and particularly to a magneto-induced torque measurement device and a magneto-induced torque measurement method. Background Art

[0002] When performing magnetic resonance imaging (MRI) detection, the human body needs to be placed in a magnetic field. If there are implants containing ferromagnetic substances in the human body, the implants may displace and deflect in the human body, affecting the user's life safety. Therefore, relevant standards require magnetic resonance compatibility magneto-induced torque tests for implants.

[0003] In the related art, for example, a Chinese invention patent with the publication number CN114624097B discloses a torsion spring method magneto-induced torque measurement device and method, which obtains the torque received by the object to be measured through the torque received by the torsion spring, and can expand the elastic coefficient range by replacing different torsion springs, and thus can measure a larger range of torques.

[0004] However, the above structure still has certain defects. For example, when replacing the torsion spring, it is necessary to disassemble the loading plate and the adjusting belt, and the replacement is relatively inconvenient. Moreover, when the implant is stressed in the magnetic field, the stress direction is uncertain, and the torsion spring may be reversely twisted, affecting the reliability of the torsion spring. In addition, even if a torsion spring with a small elastic coefficient is used, the lower limit of the torque that can be measured is still relatively high, and it is difficult to measure small torques.

[0005] Therefore, it is necessary to improve the existing technology to overcome the above-mentioned defects in the existing technology. Summary of the Invention

[0006] The purpose of the present invention is to provide a magneto-induced torque measurement device and a magneto-induced torque measurement method, which can conveniently measure torques of different magnitudes.

[0007] To achieve the above-mentioned invention purpose, the present invention provides a magneto-induced torque measurement device, including:

[0008] A base provided with a first circular scale;

[0009] A frame assembly rotatably connected to the base, including an outer frame and a first pointer relatively fixed to the outer frame. The outer frame includes a bottom plate and is provided with an inner cavity, and the first pointer points to the first circular scale;

[0010] A stage disposed in the inner cavity and rotatably connected to the bottom plate. The stage includes a loading plate for fixing the object to be measured; and,

[0011] The balancing device includes two wire fixers relatively fixed to the frame assembly and an elastic assembly connected between the wire fixers and the load tray, and the moments applied by the two elastic assemblies to the load tray are in opposite directions.

[0012] Further, the elastic assembly includes an elastic member, a first connecting wire connected between the elastic member and the wire fixer, and a second connecting wire connected between the elastic member and the load tray.

[0013] Further, both of the two elastic members are connected to the load tray through an independent second connecting wire; or,

[0014] The two elastic members are connected through a second connecting wire, and the middle part of the second connecting wire is connected to the load tray.

[0015] Further, the outer periphery of the load tray is provided with a top annular boss, a middle annular boss and a bottom annular boss protruding outward. An upper annular groove is formed between the top annular boss and the middle annular boss, and a lower annular groove is formed between the middle annular boss and the bottom annular boss. The middle annular boss is provided with a wire passing hole communicating the upper annular groove and the lower annular groove. The two elastic members are connected through a second connecting wire, and a part of the second connecting wire is wound in the upper annular groove, passes through the wire passing hole and then is wound in the lower annular groove;

[0016] The carrier table further includes a wire blocking member for blocking the second connecting wire from disengaging from the upper annular groove and the lower annular groove.

[0017] Further, the wire fixer is a wire winder capable of adjusting the tension of the elastic member;

[0018] The elastic member is an elastic cord or a spring;

[0019] Both ends of the elastic member are hooked to the first connecting wire and the second connecting wire;

[0020] The rotation axis of the frame assembly rotating relative to the base is coaxially arranged with the rotation axis of the carrier table rotating relative to the bottom plate.

[0021] Further, the magneto-torque measuring device includes two sets of the balancing devices, and the two sets of balancing devices are symmetrically arranged about the center.

[0022] Further, the base includes a base plate and a scale table provided on the base plate, and the first circular scale is provided on the scale table;

[0023] The frame component further includes a height adjustment component connected between the base and the outer frame. The height adjustment component includes a plurality of height adjustment members, and the height of the outer frame is adjusted by increasing or decreasing the number of the height adjustment members.

[0024] Further, a positioning boss is provided at the upper end of the height adjustment member, and a first positioning hole is provided at the lower end. Two adjacent height adjustment members are connected through the positioning boss and the first positioning hole. The outer frame is provided with a second positioning hole adapted to the positioning boss.

[0025] Further, the carrier includes a second pointer fixedly opposite to the carrier plate; the magneto-torque measuring device further includes a second scale provided in the inner cavity and fixedly connected to the frame component. The second scale is provided with a second circular scale, and the second pointer points to the second circular scale.

[0026] Further, the frame component includes a bearing seat connected to the bottom plate, a bearing provided in the bearing seat, and a rotating shaft connected to the bearing. The second scale is connected to the bearing seat, and the carrier plate is located above the second scale and connected to the rotating shaft.

[0027] Further, the frame component includes a top plate opposite to the bottom plate and a partition plate horizontally provided between the bottom plate and the top plate. The partition plate is provided with a third circular scale. The magneto-torque measuring device further includes:

[0028] A carrier for carrying a test object. The carrier includes a third pointer pointing to the third circular scale; and,

[0029] A suspension line component. The suspension line component passes through the partition plate and includes a wire body and an elastic line arranged coaxially. One end of the wire body is fixedly opposite to the top plate, and the other end is connected to the carrier. One end of the elastic line is connected to the rotating shaft, and the other end is connected to the carrier. The magneto-torque measuring device further includes a fixing member for fixing the rotating shaft.

[0030] Further, when the torque acting on the elastic component reaches one-tenth of the gravitational torque of the test object, the rotation angle of the carrier is greater than or equal to 1°. The gravitational torque of the test object is equal to the product of the maximum linear dimension L of the test object and its gravity G;

[0031] When the torque acting on the suspension line component reaches one-tenth of the gravitational torque of the test object, the rotation angle of the carrier is greater than or equal to 1°. The gravitational torque of the test object is equal to the product of the maximum linear dimension L of the test object and its gravity G.

[0032] Further, the wire fixer includes a force sensor connected to the first connecting wire; or,

[0033] The balance device includes a force measuring sensor connected between the wire fixator and the elastic member.

[0034] In a second aspect, the present invention provides a method for measuring magneto-induced torque, which includes the following steps:

[0035] S1. Fix the object to be measured on the carrier plate;

[0036] S2. Place the magneto-induced torque measuring device on a horizontal plane, adjust the tightness of the elastic member through the wire fixator to make the carrier plate in a balanced position, and let it stand still until the carrier plate stops swinging;

[0037] S3. Place the magneto-induced torque measuring device into a magnetic resonance imaging device, let it stand still until it is stable, and obtain the torsional angle of deflection of the second pointer according to the position of the second pointer;

[0038] S4. Drive the frame assembly to rotate relative to the base within an angular range of 0 to 360°, after each rotation of 10°, let the magneto-induced torque measuring device stand still until the second pointer remains stable, obtain the corresponding torsional angle according to the position of the second pointer and record it;

[0039] S5. Calculate the torque.

[0040] In a third aspect, the present invention provides a method for measuring magneto-induced torque, which includes the following steps:

[0041] B1. Fix the object to be measured on the carrier plate;

[0042] B2. Place the magneto-induced torque measuring device on a horizontal plane, adjust the tightness of the elastic member through the wire fixator to make the carrier plate in a balanced position, and let it stand still until the carrier plate stops swinging;

[0043] B3. Place the magneto-induced torque measuring device into a magnetic resonance imaging device, let it stand still until it is stable, and read and record the pulling force of the force measuring sensor;

[0044] B4. Drive the frame assembly to rotate relative to the base within an angular range of 0 to 360°, after each rotation of 10°, let the magneto-induced torque measuring device stand still until the carrier plate remains stable, read and record the pulling force of the force measuring sensor;

[0045] B5. Calculate the torque.

[0046] In a fourth aspect, the present invention provides a method for measuring a magneto-induced torque measuring device, which includes the following steps:

[0047] Select to use the carrier plate or the carrier to measure the magneto-induced torque;

[0048] If the carrier is selected to measure the magneto-induced torque, the magneto-induced torque measurement method includes the following steps:

[0049] A1. Fix the rotating shaft through the fixing member, install the carrier with the object to be measured into the magneto-induced torque measuring device, connect the top plate and the carrier through the wire body, and connect the carrier and the rotating shaft through the elastic wire;

[0050] A2. Place the magneto-induced torque measuring device on a horizontal plane and let it stand still until the carrier stops swinging;

[0051] A3. Place the magneto-induced torque measuring device into the magnetic resonance imaging device, let it stand still until it is stable, and obtain the torsional angle of deflection of the third pointer according to the position of the third pointer;

[0052] A4. Drive the frame assembly to rotate relative to the base within the angular range of 0 to 360°, let the magneto-induced torque measuring device stand still after every 10° rotation until the third pointer remains stable, obtain the corresponding torsional angle according to the position of the third pointer and record it;

[0053] A5. Calculate the torque.

[0054] Compared with the prior art, the present invention has the following beneficial effects: The magneto-induced torque measuring device includes a base, a frame assembly, a carrier table and a balancing device. The frame assembly is rotatably connected to the base; the carrier table is arranged in the inner cavity and is rotatably connected to the bottom plate; the balancing device includes two wire fixers fixedly connected to the frame assembly and an elastic member connected between the wire fixers and the carrier table. By connecting the elastic member to the wire fixers and the carrier table, it is convenient to replace elastic members with different elastic coefficients, so as to measure magneto-induced torques of different magnitudes; in addition, the frame assembly is rotatably connected to the base, and the magneto-induced torque of the object to be measured at different angles can be measured. Description of the Drawings

[0055] Figure 1 is a schematic diagram of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0056] Figure 2 is a schematic diagram of a magneto-induced torque measuring device according to an embodiment of the present invention with the windshield removed.

[0057] Figure 3 is a sectional view of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0058] Figure 4 is Figure 3 a partial enlarged view of part I in

[0059] Figure 5a It is a schematic diagram showing the connection between the stage and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0060] Figure 5b It is a schematic diagram showing the connection between the sample plate and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0061] Figure 5c It is a schematic diagram showing the connection between the sample plate and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0062] Figure 6a It is a schematic diagram showing the connection between the stage and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0063] Figure 6b It is a schematic diagram showing the connection between the sample plate and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0064] Figure 6c It is a schematic diagram showing the connection between the sample plate and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0065] Figure 7 It is a schematic diagram of a stage of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0066] Figure 8 It is a sectional view of a stage of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0067] Figure 9 is Figure 8 The partial enlarged view at II in.

[0068] Figure 10 It is a schematic diagram showing the connection between the sample plate and the second connecting line of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0069] Figure 11 is in the present invention Figure 10 The schematic diagram of the threading of the second connecting line.

[0070] Figure 12 It is a sectional view of the sample plate and the wire blocking member of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0071] Figure 13 It is a schematic diagram showing the connection between the stage and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0072] Figure 14 It is a schematic diagram showing the connection between the stage and the balancing device of a magneto-induced torque measuring device according to an embodiment of the present invention.

[0073] Figure 15 It is a schematic diagram showing the connection between the stage and the balancing device of a magneto-induced torque measuring device in an embodiment of the present invention.

[0074] Figure 16 It is an exploded view of the base, height adjustment assembly and outer frame of a magneto-induced torque measuring device in an embodiment of the present invention.

[0075] Figure 17 It is a schematic diagram of the height adjustment member of a magneto-induced torque measuring device in an embodiment of the present invention.

[0076] Figure 18 It is a sectional view of the height adjustment member of a magneto-induced torque measuring device in an embodiment of the present invention.

[0077] Figure 19 It is a schematic diagram showing the connection between the stage and the balancing device of a magneto-induced torque measuring device in an embodiment of the present invention.

[0078] Figure 20 It is a sectional view of a magneto-induced torque measuring device in an embodiment of the present invention.

[0079] Figure 21 It is Figure 20 a partial enlarged view at position III in

[0080] Figure 22 It is a schematic diagram showing the connection between the carrier and the suspension device of a magneto-induced torque measuring device in an embodiment of the present invention.

[0081] Figure 23 It is a schematic diagram showing the connection between the carrier and the suspension device of a magneto-induced torque measuring device in an embodiment of the present invention.

[0082] Figure 24 It is a schematic diagram showing the connection between the stage, bearing seat, bearing and rotating shaft of a magneto-induced torque measuring device in an embodiment of the present invention.

[0083] Figure 25 It is a flow chart of a magneto-induced torque measuring method in an embodiment of the present invention.

[0084] Figure 26 It is a flow chart of a magneto-induced torque measuring method in an embodiment of the present invention.

[0085] Figure 27 It is a flow chart of a magneto-induced torque measuring method in an embodiment of the present invention. Detailed implementation manners

[0086] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the specific embodiments of the present application in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only for explaining the present application and not for limiting the present application. Additionally, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0087] The terms "including" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0088] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0089] As Figures 1 to 3 shown, corresponding to a magneto-torque measuring device according to a preferred embodiment of the present invention, it includes a base 1, a frame assembly 2, a stage 3, and a balancing device 4. The base 1 is provided with a first circular scale 10, whose range is 0 to 360°, and the resolution can be selected as 1° or less than 1° (for example, 0.5°).

[0090] The frame assembly 2 is rotatably connected to the base 1 and can be rotated 360° under the drive of an external force, so as to change the placement angle of the object under test 9 carried by the stage 3, and further measure the magnitude of the magneto-torque received by the object under test 9 at different angles. The frame assembly 2 includes an outer frame 20 and a first pointer 21 relatively fixed to the outer frame 20. The first pointer 21 can be directly connected to the outer frame 20 or connected to the outer frame 20 through other parts. The outer frame 20 includes an inner cavity 200 and a bottom plate 201, and the first pointer 21 points to the first circular scale 10 for facilitating reading the scale indicated by it.

[0091] The stage 3 is disposed in the inner cavity 200 and is rotatably connected to the bottom plate 201. The stage 3 includes a carrier plate 30 for fixing the object under test 9. When the object under test 9 is subjected to a magnetic force, the stage 3 rotates under the torque of the object under test 9. Figure 2In it, a fixture 36 is provided on the loading tray 30, and the object 9 to be measured is fixed within the fixture 36.

[0092] The balancing device 4 includes two wire fixators 40 relatively fixed to the frame assembly 2 and an elastic assembly connected between the wire fixators 40 and the loading tray 30. The elastic assembly functions to balance the loading platform 3.

[0093] The torques exerted by the two elastic assemblies on the loading tray 30 are in opposite directions. When the torque exerted by one elastic assembly on the loading tray 30 is clockwise, the torque exerted by the other is counterclockwise. In this way, the loading tray 30 can be kept in balance under the elastic force of the elastic assembly when no external force is applied. When the loading platform 3 rotates clockwise or counterclockwise under an external force, it will rotate against the elastic force of one of the elastic assemblies. Under the action of this elastic assembly, the loading tray 30 will remain in balance after rotating to a certain angle; when the external force acting on the loading tray 30 disappears, the two elastic assemblies cooperate to provide an elastic force to drive the loading platform 3 to reset, so that the loading tray 30 returns to its initial balanced position.

[0094] In some embodiments, the elastic assembly includes an elastic member 41, a first connecting wire 42 connected between the elastic member 41 and the wire fixator 40, and a second connecting wire 43 connected between the elastic member 41 and the loading tray 30.

[0095] The stiffness coefficient of the elastic assembly is known or can be obtained by measurement. The distance between the connection point of the elastic assembly and the loading tray 30 and the center of the loading tray 30 can also be measured. Therefore, when the deflection angle of the loading tray 30 or the magnitude of the force exerted by the elastic assembly on the loading tray 30 is known, the magnitude of the torque received at the current position of the loading tray 30 can be calculated. For the convenience of calculation, optionally, parameters such as the lengths and stiffness coefficients of the two elastic assemblies are the same. For example, elastic assemblies of the same material and the same structure can be selected. Further, by rotating the frame assembly 2 to change the angle of the object 9 to be measured in the magnetic field, the magneto-torque received by the object 9 at different angles can be measured, and then the maximum torque can be obtained.

[0096] For the magneto-torque measuring device with the above structure, by connecting the elastic assembly to the wire fixator 40 and the loading platform 3, the elastic assembly can be replaced more conveniently; at the same time, an elastic assembly with an appropriate stiffness coefficient can be selected according to the magnitude of the magneto-torque received by the object 9 to meet the requirements of measuring magneto-torques of different magnitudes. In addition, the frame assembly 2 and the base 1 are rotatably connected, and the magneto-torque of the object 9 at different angles can be measured.

[0097] As Figure 5a and Figure 6a show two feasible arrangement modes of the balancing device 4. Figure 5a In the illustrated embodiment, both wire fixators 40 are located on the right side of the loading platform 3.Figure 6a In the illustrated embodiment, both of the two wire fixers 40 are located on the front side of the stage 3.

[0098] Both of the two elastic members 41 are connected to the wire fixer 40 through the first connection wire 42 and connected to the stage 3 through the second connection wire 43. The elastic member 41 is located between the first connection wire 42 and the second connection wire 43. Optionally, the two wire fixers 40 are symmetrically arranged, and the two first connection wires 42 are arranged in parallel.

[0099] In some embodiments, both of the two elastic members 41 are connected to the carrier tray 30 through an independent second connection wire 43; at this time, one end of the second connection wire 43 is connected to the elastic member 41, and the other end is connected to the carrier tray 30. In this embodiment, the two second connection wires 43 are two independent wires and are not connected. For example, Figure 5a In the illustrated embodiment, a feasible connection structure can be referred to Figure 5b , Figure 6a In the illustrated embodiment, a feasible connection structure can be referred to Figure 6b , and the two second connection wires 43 are directly connected to the carrier tray 30.

[0100] In some other embodiments, the two elastic members 41 are connected through the same second connection wire 43 (including the case where the two second connection wires 43 are connected into one), at this time, both ends of the second connection wire 43 are respectively connected to the two elastic members 41, and the middle part is connected to the carrier tray 30. For example, Figure 5a In the illustrated embodiment, a feasible connection structure can be referred to Figure 5c , the second connection wire 43 winds 180° on the carrier tray 30, Figure 6a In the illustrated embodiment, a feasible connection structure can be referred to Figure 6c , the second connection wire 43 winds 360° on the carrier tray 30. It can be understood that Figure 5b , Figure 5c , Figure 6b and Figure 6c The cross-hatching in is to distinguish different connection wires.

[0101] In the embodiment where the two elastic members 41 are connected through the same second connection wire 43, in order to ensure that the second connection wire 43 reliably applies a force to the carrier tray 30, the second connection wire 43 needs to be reliably connected to the carrier tray 30 to prevent slipping and affecting the accuracy of the measurement result. As Figures 7 to 9As shown, as a feasible implementation, the outer periphery of the carrier tray 30 is provided with an outwardly convex top annular boss 31, a middle annular boss 32, and a bottom annular boss 33; an upper annular groove 310 is formed between the top annular boss 31 and the middle annular boss 32, and a lower annular groove 330 is formed between the middle annular boss 32 and the bottom annular boss 33; the middle annular boss 32 is provided with a wire passing hole 320 communicating the upper annular groove 310 and the lower annular groove 330; as Figure 9 shown, optionally, the axis of the wire passing hole 320 is perpendicular to the upper annular groove 310 and the lower annular groove 330. As Figure 10 and Figure 11 shown, the two elastic members 41 are connected by a second connecting wire 43. After the second connecting wire 43 is led out from one elastic member 41, it enters the upper annular groove 310, partially surrounds inside the upper annular groove 310, passes through the wire passing hole 320 and then surrounds inside the lower annular groove 330, and is connected to the other elastic member 41. By improving the winding mode of the second connecting wire 43, it is beneficial to ensure the reliability of the force exerted by the second connecting wire 43 on the carrier tray 30 and improve the accuracy of magneto-torsion measurement.

[0102] As a further optimization, the carrier 3 further includes a wire blocking member 34 for blocking the second connecting wire 43 from disengaging from the upper annular groove 310 and the lower annular groove 330, thereby preventing the second connecting wire 43 from disengaging from the upper annular groove 310 and the lower annular groove 330 when the carrier 3 rotates and facilitating wire threading. As Figure 5a and Figure 6a shown, in some embodiments, the number of the wire blocking members 34 is four, and the four wire blocking members 34 are evenly arranged on the outer peripheral surface of the carrier tray 30, and are fixed to the carrier tray 30 by screws, for example. As Figure 12 shown, in other embodiments, the wire blocking member 34 is columnar, vertically penetrates through the carrier tray 30, and passes through the upper annular groove 310 and the lower annular groove 330. The wire blocking member 34 is farther from the center of the carrier tray 30 than the wire passing hole 320, so as to be located outside the second connecting wire 43 to block the second connecting wire 43.

[0103] The wire fixer 40 is a wire winder that can adjust the tension of the elastic member 41. For example, the elastic member 41 can be tightened by rotation, so as to conveniently adjust the position of the stage 3 when the magneto - torque measuring device is not affected by magnetic force to balance the state. The elastic member 41 is made of an elastic material. Optionally, the elastic member 41 is an elastic cord (such as a rubber band) or a spring. The first connecting wire 42 and the second connecting wire 43 are made of materials with greater rigidity to reduce the measurement error caused by their plastic deformation. For example, they can be made of nylon wire or yarn, etc. Optionally, the elastic deformation of the first connecting wire 42 and the second connecting wire 43 can be ignored, and the stiffness coefficient of the elastic component can be approximately equal to the stiffness coefficient of the elastic member 41 for easy calculation. Of course, the stiffness coefficient of the elastic component can also be measured as a whole to improve the accuracy.

[0104] To further facilitate the replacement of the elastic member 41, both ends of the elastic member 41 are hooked to the first connecting wire 42 and the second connecting wire 43. As Figure 13 and Figure 14 shown, hooks 44 are provided between the first connecting wire 42 and the elastic member 41 and between the second connecting wire 43 and the elastic member 41. Buckles 45 are provided at the ends of the first connecting wire 42, the second connecting wire 43 and the elastic member 41. By hooking the buckle 45 with the hook 44, the elastic member 41 can be conveniently disassembled and assembled. Figure 14 In the embodiment shown, the elastic member 41 is an annular rubber band that is directly hooked on the hook 44. In other embodiments, the elastic member 41 can be connected and fixed to the connecting wire or other components by tying a slipknot or clamping with a clip, etc.

[0105] To ensure that when the rotating frame assembly 2 rotates, the rotation angle of the object to be measured 9 is consistent with that of the frame assembly 2, the rotation axis of the frame assembly 2 relative to the base 1 is coaxially arranged with the rotation axis of the stage 3 relative to the bottom plate 201.

[0106] In some embodiments, as Figure 2 and Figure 15 shown, the magneto - torque measuring device includes two sets of balancing devices 4, and the two sets of balancing devices 4 are symmetrically arranged at the center, so that the force on the carrier plate 30 is more symmetric and balanced, further improving the stability of the magneto - torque measuring device. In Figure 1 and Figure 2 shown embodiments, the frame assembly 2 further includes brackets 26 arranged on both sides of the frame assembly 2. The two sets of balancing devices 4 are respectively symmetrically installed on the brackets 26. Through holes 207 are provided at the corresponding positions of the outer frame 30 and the wire fixer 40, and the second connecting wire 43 passes through the through hole 207 and is fixed to the stage 3.

[0107] As Figure 1As shown in the figure, in order to reduce the influence of the external environment (such as air flow) on the measurement accuracy during measurement, the frame assembly 2 further includes a baffle 203. The baffle 203, the bottom plate 201, the top plate 203 and the side plate 206 are connected to each other to form a relatively enclosed inner cavity 200. To facilitate the placement of the object to be measured 9, the baffle 203 and the side plate 206 are connected by, for example, hinge pieces; alternatively, the side plate 206 is provided with a chute, and the baffle 203 is arranged in the chute, and the opening and closing of the frame assembly 2 are realized by pushing and pulling the baffle 203.

[0108] As Figures 1 to 3 shown in the figure, the base 1 includes a base plate 11 and a scale table 12 provided on the base plate 11, and a first circular scale 10 is provided on the scale table 12. The base plate 11 and the scale table 12 can be fixedly connected by, for example, gluing, screwing, etc., and the first circular scale 10 can be provided on the scale table 12 by, for example, laser engraving.

[0109] In order to ensure that the object to be measured 9 of the magneto - torque measuring device is always at the center position of the magnetic field in different test environments, thereby making the device test more accurate, the frame assembly 2 further includes a height - adjusting assembly 22 connected between the base 1 and the outer frame 20. The height of the object to be measured 9 can be adjusted through the height - adjusting assembly 22. In some embodiments, the height - adjusting assembly 22 includes a plurality of height - adjusting members 220, and the height of the outer frame 20 is adjusted by increasing or decreasing the number of height - adjusting members 220; when the magneto - torque measuring device includes the height - adjusting members 220, since the height - adjusting members 220 are closer to the first circular scale 10, the first pointer 21 is provided on the height - adjusting members 220 and is correspondingly arranged with the first circular scale 10 for easy reading; therefore, the first pointer 21 needs to be arranged on the outer frame 20 or on the height - adjusting members 220 according to the actual situation. As Figure 1 and Figure 2 shown in the embodiment, the projection of the height - adjusting member 220 in the vertical direction is rectangular, and the first pointer 21 is provided at the four corners of the height - adjusting member 220 corresponding to the first circular scale 10.

[0110] As Figure 1 and Figure 2 shown in the embodiment, the heights of the plurality of height - adjusting members 220 are not completely equal, so that the object to be measured 9 is at different heights through the combination of height - adjusting members 220 with different heights. Further, the base plate 11 includes 4 symmetrically arranged screws 110, and the height of the object to be measured 9 can be finely adjusted by the screws 110 so that the object to be measured 9 is at the center position of the magnetic field; in addition, the magneto - torque measuring device can be made horizontal by adjusting the screws 110.

[0111] Further, as Figures 16 to 18As shown, in order to facilitate the disassembly and assembly of the height-adjusting member 220, a positioning boss 2200 is provided at the upper end of the height-adjusting member 220, and a first positioning hole 2201 is provided at the lower end. Two adjacent height-adjusting members 220 are connected by inserting the positioning boss 2200 into the first positioning hole 2201. The outer frame 20 is provided with a second positioning hole 202 adapted to the positioning boss 2200, and is connected by inserting the positioning boss 2200 of the height-adjusting member 220 below it into the second positioning hole 202. It can be understood that the number and positions of the positioning bosses 2200 and the first positioning holes 2201 on each height-adjusting member 220 are the same, so that any two height-adjusting members 220 can be connected to each other.

[0112] The rotatable connection mode between the frame assembly 2 and the base 1 can be diversified. In some embodiments, the substrate 11 includes a rotating shaft 111 protruding upward, and the axis of the rotating shaft 111 is coaxially arranged with the rotation axis of the carrier 3 relative to the bottom plate 201; as Figure 2 shown, a rotating shaft hole 1110 is provided at the centers of both the height-adjusting member 220 and the bottom plate 201, and the rotatable connection is achieved through the cooperation of the rotating shaft 111 and the rotating shaft hole 1110; the frame assembly 2 is located on the upper surface of the scale table 12. After adjusting the angle of the frame assembly 2, the frame assembly 2 and the scale table 12 are relatively fixed by friction, so as to ensure that the frame assembly 2 remains stationary when the device measures the magneto-induced torsion.

[0113] The rotatable connection mode between the carrier 3 and the bottom plate 201 can also be diversified. In some embodiments, as Figure 3 and Figure 4 shown, the frame assembly 2 includes a bearing seat 23 connected to the bottom plate 201, a bearing 24 provided in the bearing seat 23, and a rotating shaft 25 connected to the bearing 24. Figure 4 In the embodiment shown, two bearings 24 are provided in the bearing seat 23. The outer ring of the bearing 24 is fixedly connected to the bearing seat 23, and the inner ring is fixedly connected to the rotating shaft 25. The carrier plate 30 is connected to the upper end of the rotating shaft 25 and can rotate with the rotating shaft 25. Since the rotation resistance of the bearing 24 is small, after the object to be measured 9 is subjected to the magneto-induced torque, the carrier plate 30 will be driven to deflect by a certain angle. However, the sliding friction between the frame assembly 2 and the scale table 12 is large, so the frame assembly 2 will not be driven to deflect.

[0114] In some embodiments, the stage 3 includes a second pointer 35 fixedly opposite to the stage plate 30. The magneto-torque measuring device further includes a second scale 5 disposed in the inner cavity 200 and fixedly connected to the frame assembly 2. The second scale 5 is provided with a second circular scale 50. The range and resolution of the second circular scale 50 can refer to the first circular scale 10. The second pointer 35 points to the second circular scale 50. When the stage 3 is deflected by an external force, the deflection angle can be read out. The second scale 5 is fixedly connected to the bearing block 23, for example, connected by screws; the stage plate 30 is located above the second scale 5 and connected to the rotating shaft 25, and it can rotate relative to the second scale 5. Optionally, the projections of the stage plate 30 and the second scale 5 on the horizontal plane are both circular. The second circular scale 50 is provided on the upper surface of the second scale 5 facing the stage plate 30. The diameter of the stage plate 30 is smaller than the diameter of the second circular scale 50. When the object under test 9 is deflected under the action of the magnetic field, the torsion angle can be read out through the scale indicated by the second pointer 35, and the magneto-torque received by the object under test 9 can be calculated. For example, through the formula r = R 2 △θK is calculated. In the formula, R is the distance from the connection point of the elastic component and the stage plate 30 to the center of the stage plate 30, which can be approximately equal to the radius of the stage plate 30. △θ is the radian value of the torsion angle, and K is the sum of the stiffness coefficients of all elastic components that apply resistance to the stage plate 30. It can be understood that those skilled in the art can modify the formula to make its calculation result more accurate.

[0115] Optionally, when the torque acting on the elastic component reaches one-tenth of the gravitational torque of the object under test 9, the rotation angle of the stage 3 is greater than or equal to 1°. The gravitational torque of the object under test 9 is equal to the product of the maximum linear dimension L of the object under test 9 and its gravity G. So that the magneto-torque measuring device has good sensitivity when testing through the stage 3. In some other embodiments, the magneto-torque is calculated through the value of the force sensor 46. For example, as a feasible implementation manner, the wire fixer 40 includes a force sensor 46 connected to the first connection wire 42. When the object under test 9 is subjected to a magnetic force, the stage plate 30 will be deflected. The tension of the elastic member 41 can be read from the force sensor 46, and the magneto-torque can be calculated. For example, the magnitude of the magneto-torque received by the object under test 9 can be calculated through the formula r = FR. In the formula, R is the distance between the connection point of the elastic component and the stage plate 30 and the center of the stage plate 30, F is the sum of the force value changes of all the force sensors 46 corresponding to the elastic components that apply resistance to the stage plate 30, and r is the calculated torque. It can be understood that in other implementation manners, the balancing device 4 includes a force sensor 46 connected between the wire fixer 40 and the elastic member 41. Such as Figure 19As shown, the force measuring sensor 46 is connected between the elastic member 41 and the first connecting line 42, and the magnitude of the applied force can also be read. The force measuring sensor 46 can be, for example, a tensile force sensor.

[0116] It can be understood that the data of the force measuring sensor 46 can be transmitted to the outside of the magnetic resonance imaging device through a data line.

[0117] It should be noted that the force measuring sensor 46 and the second circular scale 50 can exist simultaneously. By calculating the torque value in two ways, verification can be carried out to further improve the accuracy of the calculation result.

[0118] Optionally, K satisfies the following formula: where T 磁max refers to the maximum torque exerted on the object 9 to be measured in the magnetic field, and the meanings of other symbols are the same as above. When K satisfies this formula, during the test process, when the torsional moment acting on the elastic component reaches one-tenth of the gravitational moment of the object 9 to be measured, the deflection angle of the carrier plate 30 in the magnetic field is between 1° and 25°, with better resolution and improved accuracy of the test result.

[0119] As Figures 19 to 23 shown, the frame assembly 2 includes a top plate 203 disposed opposite to the bottom plate 201 and a partition plate 204 horizontally disposed between the bottom plate 201 and the top plate 203. The partition plate 204 is located above the stage 3; the partition plate 204 is provided with a third circular scale 2040, and the range and resolution of the third circular scale 2040 can refer to the first circular scale 10. The magneto-torque measuring device further includes a carrier 6 and a suspension line assembly 7, which can achieve the measurement of smaller torques. For small torques that are difficult to measure for the carrier plate 30, they can be measured through the suspension line assembly 7.

[0120] The carrier 6 is used to carry the object 9 to be measured. The carrier 6 includes a third pointer 60 pointing to the third circular scale 2040, and the deflection angle of the object 9 after being acted on by the magnetic field force can be determined by the position of the third pointer 60. Optionally, for easy reading, the partition plate 21 is horizontally disposed, the second circular scale 210 is provided on the upper surface of the partition plate 21, and the second pointer 41 is located above the partition plate 21. Further optionally, the outer frame 20 is made of a transparent material for easy reading of the values.

[0121] The suspension line assembly 7 passes through the partition plate 204. It includes a wire body 70 and an elastic wire 71 arranged coaxially. One end of the wire body 70 is fixedly opposed to the top plate 203, and the other end is connected to the carrier 6. One end of the elastic wire 71 is connected to the rotating shaft 25, and the other end is connected to the carrier 6. Optionally, the wire body 70 and the elastic wire 71 are arranged coaxially with the rotation axis of the frame assembly 2 relative to the base 1. For the convenience of connection, a hook 27 is provided on both the top plate 203 and the rotating shaft 25. The suspension line assembly 7 is connected by hooking the hook 27. Similarly, the wire body 70 and the carrier 6, as well as the elastic wire 71 and the carrier 6, can be connected by hooking. The upper end of the carrier 6 is suspended by the wire body 70, and the lower end is connected to the rotating shaft 25 by the elastic wire 71. The elastic wire 71 applies a certain elastic force to the carrier 6 to suppress the shaking of the carrier 6, so that the suspension state can be maintained more accurately, improving the measurement accuracy. The elasticity of the wire body 70 can be ignored relative to the elastic wire 71. Optionally, the elasticity of the wire body 70 is less than or equal to one-tenth of the elasticity of the elastic wire 71. The wire body 70 can be made of, for example, nylon wire or yarn, etc.

[0122] To prevent the rotating shaft 25 from rotating with the carrier 6 when the carrier 6 is rotated by an external force, which affects the accuracy of the measurement result, the magneto-induced torque measuring device further includes a fixing member 8 for fixing the rotating shaft 25. As Figure 24 shown, in one embodiment, the bearing seat 23 is provided with a threaded hole 230 in the horizontal direction. The fixing member 8 is screwed into the threaded hole 230 and abuts against the rotating shaft 25, thereby playing a role in fixing the rotating shaft 25. When measuring with the carrier plate 30, rotate the fixing member 8 to disengage it from the rotating shaft 25, and the rotating shaft 25 can rotate freely.

[0123] Optionally, when the object to be measured 9 is placed in the carrier 6 and the magneto-induced torque is measured through the suspension line assembly 7, the carrier 3, the balancing device 4, the bearing seat 23, the bearing 24, and the rotating shaft 25 in the inner cavity 200 of the outer frame 2 can be removed, and one end of the elastic wire 71 is directly connected to the bottom plate 201.

[0124] When the object to be measured 9 is subjected to a magnetic force, it will deflect against the resistance of the suspension line assembly 7 and finally stay at the equilibrium position. The deflection angle of the object to be measured 9 can be read through the third pointer 60. The torque is calculated by the formula r = k△θ, where k is the torsional coefficient of the suspension line assembly 7, △θ is the radian value of the torsional angle, and r is the calculated torque. The magneto-induced torque received by the object to be measured 9 can be calculated. Similarly, by rotating the frame assembly 2, the angle of the object to be measured 9 in the magnetic field can be changed, so as to obtain the magneto-induced torque at different angles.

[0125] Since the torsional coefficient of the suspension wire assembly 7 is very small, smaller magneto-torques can be measured, greatly increasing the measurement range of the magneto-torque measuring device and solving the problem in the prior art that small torques cannot be measured or are difficult to accurately measure.

[0126] As can be seen from the above, measuring the magneto-torque by means of the carrier 6 is applicable to the object under test 9 with a relatively small magneto-torque value, and measuring the magneto-torque by means of the carrier plate 30 is applicable to the object under test 9 with a relatively large magneto-torque value. Before the test, the user can estimate the magnitude of the magneto-torque according to the object under test 9 and choose to use the carrier plate 30 or the carrier 6 to measure the magneto-torque. When it is found during the test that the deflection of the object under test 9 is too small or too large, the carrier plate 30 and the carrier 6 can also be used for measurement.

[0127] Optionally, when the torque acting on the suspension wire assembly 7 reaches one-tenth of the gravitational torque of the object under test 9, the rotation angle of the carrier 6 is greater than or equal to 1°, and the gravitational torque of the object under test 9 is equal to the product of the maximum linear dimension L of the object under test 9 and its gravity G. This enables the magneto-torque measuring device to have good sensitivity when testing through the carrier 6.

[0128] The present invention provides a method for measuring magneto-torque. When measuring the magneto-torque through the carrier plate 30, as Figure 25 shown, in the case where the magneto-torque measuring device includes a second circular scale 50 and a second pointer 35, the method for measuring magneto-torque includes the following steps.

[0129] S1. Fix the object under test 9 on the carrier plate 30.

[0130] S2. Place the magneto-torque measuring device on a horizontal plane, and adjust the tightness of the elastic component (specifically, the elastic member 41) through the wire fixer 40 so that the carrier plate 30 is in a balanced position, and let it stand until the carrier plate 30 stops swinging.

[0131] S3. Place the magneto-torque measuring device into the magnetic resonance imaging device, and after standing until it is stable, obtain the torsional angle of deflection of the second pointer 35 according to the position of the second pointer 35.

[0132] S4. Drive the frame assembly 2 to rotate relative to the base 1 within the angular range of 0 to 360°. After each rotation of 10°, let the magneto-torque measuring device stand still until the second pointer 35 remains stable, and obtain the corresponding torsional angle according to the position of the second pointer 35 and record it.

[0133] S5. Calculate the torque.

[0134] In step S1, the object under test 9 can be fixed by the clamp 36, and then the clamp is fixed on the carrier plate 30, or the object under test 9 can be directly fixed on the carrier plate 30.

[0135] In step S2, when the carrier plate 30 is in the equilibrium position, record the position θ1 of the second pointer 35. Optionally, adjust the second pointer 35 to indicate the 0° position on the second circular scale 50, i.e., θ1 is 0°, so as to facilitate the calculation of the subsequent deflection angle.

[0136] It can be understood that step S1 and step S2 are preferably carried out in an environment without wind and magnetic field interference to improve the accuracy.

[0137] In step S3, after standing still until it is stable, read the position θ2 of the second pointer 35, and obtain the torsion angle of the deflection of the second pointer 35 by subtracting θ1 from θ2. In step S3, the height of the object under test 9 can be adjusted by the height adjuster 220 so that it is roughly located at the magnetic field center of the magnetic resonance imaging device, and then read the position of the second pointer 35.

[0138] In step S5, optionally, calculate the torque according to the formula r = R 2 △θK, where R is the distance from the connection point of the elastic component and the carrier plate 30 to the center of the carrier plate 30, △θ is the radian value of the torsion angle, K is the sum of the stiffness coefficients of all elastic components applying resistance to the carrier plate 30, and r is the calculated torque.

[0139] The present invention provides a method for measuring magneto-induced torque. The magneto-induced torque is measured by the carrier plate 30. As Figure 26 shown, when the magneto-induced torque measuring device includes a force measuring sensor 46, the method for measuring magneto-induced torque includes the following steps.

[0140] B1. Fix the object under test 9 on the carrier plate 30.

[0141] B2. Place the magneto-induced torque measuring device on a horizontal plane, and adjust the tightness of the elastic component (specifically, the elastic member 41) through the wire fixer 40 to make the carrier plate 30 in the equilibrium position, and stand still until the carrier plate 30 stops swinging.

[0142] B3. Place the magneto-induced torque measuring device into the magnetic resonance imaging device, and after standing still until the carrier plate 30 is stable, read and record the pulling force of the force measuring sensor 46.

[0143] B4. Drive the frame assembly 2 to rotate relative to the base 1 within the angular range of 0 to 360°. After each rotation of 10°, stand still the magneto-induced torque measuring device until the carrier plate 30 remains stable, and read and record the pulling force of the force measuring sensor 46.

[0144] B5. Calculate the torque.

[0145] In the step B1, the object 9 to be measured can be fixed by the fixture 36 and then the fixture can be fixed on the carrier plate 30, or the object 9 to be measured can be directly fixed on the carrier plate 30.

[0146] In the step B2, when the carrier plate 30 is in the equilibrium position, record the value F1 displayed by the force measuring sensor 46; optionally, when the carrier plate 30 is in the equilibrium position, adjust the value of the force measuring sensor 46 to 0 to facilitate calculation.

[0147] It can be understood that the steps B1 and B2 are also preferably carried out in an environment without wind and magnetic field interference to improve the accuracy.

[0148] In the step B3, after standing still until it is stable, read the value F2 displayed by the force measuring sensor 46, and obtain the change in the force value of the force measuring sensor after the object 9 is subjected to force in the magnetic field through F2 - F1. In the step S3, the height of the object 9 can be adjusted by the height adjusting member 220 so that it is approximately located at the magnetic field center of the magnetic resonance imaging device, and then read the value displayed by the force measuring sensor 46.

[0149] In the step B5, calculate the torque according to the formula r = FR, where R is the distance from the connection point of the elastic component and the carrier plate 30 to the center of the carrier plate 30, F is the sum of the force value changes of the force measuring sensors 46 corresponding to all the elastic components applying resistance to the carrier plate 30, and r is the calculated torque.

[0150] The present invention proposes a method for measuring magneto-induced torque, and measures the magneto-induced torque through the carrier 6, as Figure 27 shown, the method for measuring magneto-induced torque includes the following steps.

[0151] A1. Fix the rotating shaft 25 through the fixing member 8, or directly fix the elastic cord 71 on the bottom plate 201, install the carrier 6 with the object 9 to be measured into the magneto-induced torque measuring device, connect the top plate 203 and the carrier 6 through the wire body 70, and connect the carrier 6 and the rotating shaft 25 through the elastic cord 71.

[0152] A2. Place the magneto-induced torque measuring device on a horizontal plane and let it stand still until the carrier 6 stops swinging.

[0153] A3. Place the magneto-induced torque measuring device into the magnetic resonance imaging device, and after standing still until it is stable, obtain the torsional angle of deflection of the third pointer 60 according to the position of the third pointer 60.

[0154] A4. Drive the frame assembly 2 to rotate relative to the base 1 within the angular range of 0 - 360°, and after rotating 10° each time, let the magneto-induced torque measuring device stand still until the third pointer 60 remains stable, and obtain the corresponding torsional angle according to the position of the third pointer 60 and record it.

[0155] A5. Calculate the torque.

[0156] In the step A1, the object to be measured 9 can be fixed by a fixing device and then the fixing device can be fixed on the vehicle 6, or the object to be measured 9 can be directly fixed on the vehicle 6.

[0157] In the step A2, when the vehicle 6 is in the equilibrium position, record the position θ3 of the third pointer 60; optionally, adjust the third pointer 60 to indicate the 0° position on the third circular scale 2040, that is, θ3 is 0°, so as to facilitate the calculation of the subsequent deflection angle.

[0158] It can be understood that the steps A1 and A2 are preferably carried out in an environment without wind and magnetic field interference to improve the accuracy.

[0159] In the step A3, after standing still until stable, read out the position θ4 of the third pointer 60, and obtain the torsion angle of the second pointer 35 deflected by subtracting θ3 from θ4. In the step A3, the height of the object to be measured 9 can be adjusted by the height adjusting member 220 so that it is roughly located at the magnetic field center of the magnetic resonance imaging device, and then the position of the third pointer 60 is read.

[0160] In the step A5, calculate the torque according to the formula r = k△r, where k is the torsion coefficient of the suspension assembly 7, △θ is the radian value of the torsion angle, and r is the calculated torque.

[0161] The above is only the specific implementation manner of the present invention, and any improvement made on the premise of the present invention concept is regarded as the protection scope of the present invention.

Claims

1. A magneto-induced torque measuring device, characterized in that, Comprising: A base (1) provided with a first circular scale (10); A frame assembly (2) rotatably connected to the base (1), including an outer frame (20) and a first pointer (21) relatively fixed to the outer frame (20). The outer frame (20) includes a bottom plate (201) and is provided with an inner cavity (200). The first pointer (21) points to the first circular scale (10); A stage (3) disposed in the inner cavity (200) and rotatably connected to the bottom plate (201). The stage (3) includes a stage plate (30) for fixing a test object (9); and, A balancing device (4), including two wire fixers (40) relatively fixed to the frame assembly (2) and elastic components connected between the wire fixers (40) and the stage plate (30). The torques exerted on the stage plate (30) by the two elastic components are in opposite directions.

2. The magneto-induced torque measuring device according to claim 1, wherein The elastic component includes an elastic member (41), a first connecting wire (42) connected between the elastic member (41) and the wire fixer (40), and a second connecting wire (43) connected between the elastic member (41) and the stage plate (30).

3. The magneto-induced torque measuring device according to claim 2, characterized in that, Both of the two elastic members (41) are connected to the stage plate (30) through an independent second connecting wire (43); or, The two elastic members (41) are connected through a second connecting wire (43), and the middle part of the second connecting wire (43) is connected to the stage plate (30).

4. The magneto-torque measuring device according to claim 2, characterized in that, An outer convex top annular boss (31), a middle annular boss (32), and a bottom annular boss (33) are provided on the outer periphery of the stage plate (30). An upper annular groove (310) is formed between the top annular boss (31) and the middle annular boss (32), and a lower annular groove (330) is formed between the middle annular boss (32) and the bottom annular boss (33). The middle annular boss (32) is provided with a wire passing hole (320) communicating the upper annular groove (310) and the lower annular groove (330). The two elastic members (41) are connected through a second connecting wire (43), and the second connecting wire (43) partially surrounds in the upper annular groove (310), passes through the wire passing hole (320), and then surrounds in the lower annular groove (330); The stage (3) further includes a wire blocking member (34) for preventing the second connecting wire (43) from disengaging from the upper annular groove (310) and the lower annular groove (330).

5. The magneto-induced torque measuring device according to claim 2, characterized in that, The wire fixer (40) is a wire winder capable of adjusting the tension of the elastic member (41); The elastic member (41) is an elastic cord or a spring; Both ends of the elastic member (41) are hooked to the first connecting wire (42) and the second connecting wire (43); The rotation axis of the frame assembly (2) rotating relative to the base (1) is coaxially arranged with the rotation axis of the stage (3) rotating relative to the bottom plate (201).

6. The magneto-induced torque measuring device according to claim 1, characterized in that, It includes two sets of the balancing devices (4), and the two sets of the balancing devices (4) are symmetrically arranged about the center.

7. The magneto-induced torque measuring device according to claim 1, characterized in that, The base (1) includes a substrate (11) and a scale table (12) provided on the substrate (11), and the first circular scale (10) is provided on the scale table (12); The frame assembly (2) further includes a height adjustment assembly (22) connected between the base (1) and the outer frame (20). The height adjustment assembly (22) includes a plurality of height adjustment members (220), and the height of the outer frame (20) is adjusted by increasing or decreasing the number of the height adjustment members (220).

8. The magneto-induced torque measuring device according to claim 7, characterized in that, The upper end of the height adjustment member (220) is provided with a positioning boss (2200), and the lower end is provided with a first positioning hole (2201). Two adjacent height adjustment members (220) are connected through the positioning boss (2200) and the first positioning hole (2201), and the outer frame (20) is provided with a second positioning hole (202) adapted to the positioning boss (2200).

9. The magneto-induced torque measuring device according to any one of claims 1 to 8, characterized in that, The stage (3) includes a second pointer (35) fixedly opposite to the carrier plate (30); the magneto-torque measuring device further includes a second scale disk (5) provided in the inner cavity (200) and fixedly connected to the frame assembly (2). The second scale disk (5) is provided with a second circular scale (50), and the second pointer (35) points to the second circular scale (50).

10. The magneto-induced torque measuring device according to claim 9, characterized in that, The frame assembly (2) includes a bearing seat (23) connected to the bottom plate (201), a bearing (24) provided in the bearing seat (23), and a rotating shaft (25) connected to the bearing (24). The second scale disk (5) is connected to the bearing seat (23), and the carrier plate (30) is located above the second scale disk (5) and connected to the rotating shaft (25).

11. The magneto-induced torque measuring device according to claim 10, characterized in that, The frame assembly (2) includes a top plate (203) opposite to the bottom plate (201) and a partition plate (204) horizontally provided between the bottom plate (201) and the top plate (203). The partition plate (204) is provided with a third circular scale (2040), and the magneto-torque measuring device further includes: A carrier (6) for carrying the object to be measured (9). The carrier (6) includes a third pointer (60) pointing to the third circular scale (2040); and, A suspension line assembly (7). The suspension line assembly (7) passes through the partition plate (204) and includes a wire body (70) and an elastic wire (71) arranged coaxially. One end of the wire body (70) is fixedly opposite to the top plate (203), and the other end is connected to the carrier (6). One end of the elastic wire (71) is connected to the rotating shaft (25), and the other end is connected to the carrier (6). The magneto-torque measuring device further includes a fixing member (8) for fixing the rotating shaft (25).

12. The magneto-induced torque measuring device according to claim 11, characterized in that, When the torque acting on the elastic assembly reaches one-tenth of the gravitational moment of the object to be measured (9), the rotation angle of the stage (3) is greater than or equal to 1°. The gravitational moment of the object to be measured (9) is equal to the product of the maximum linear dimension L of the object to be measured (9) and its gravity G; When the torque acting on the suspension wire assembly (7) reaches one-tenth of the gravity moment of the object to be measured (9), the rotation angle of the vehicle (6) is greater than or equal to 1°, and the gravity moment of the object to be measured (9) is equal to the product of the maximum linear dimension L of the object to be measured (9) and its gravity G.

13. The magneto-torque measuring device according to any one of claims 2 to 5, characterized in that The wire fixer (40) includes a force sensor (46) connected to the first connecting wire (42); or, The balancing device (4) includes a force sensor (46) connected between the wire fixer (40) and the elastic member (41).

14. A magneto-induced torque measurement method, characterized in that, The magneto-induced torque measurement method is carried out by the magneto-induced torque measurement device according to any one of claims 9 to 11, and the magneto-induced torque measurement method includes the following steps: S1. Fix the object to be measured (9) on the object-carrying plate (30). S2. Place the magneto-induced torque measurement device on a horizontal plane, and adjust the tightness of the elastic assembly through the wire fixer (40) to make the object-carrying plate (30) in a balanced position, and let it stand still until the object-carrying plate (30) stops swinging. S3. Place the magneto-induced torque measurement device into the magnetic resonance imaging device, and after standing still until it is stable, obtain the torsion angle of deflection of the second pointer (35) according to the position of the second pointer (35). S4. Drive the frame assembly (2) to rotate relative to the base (1) within the angle range of 0 to 360°. After rotating 10° each time, let the magneto-induced torque measurement device stand still until the second pointer (35) remains stable, and obtain the corresponding torsion angle according to the position of the second pointer (35) and record it. S5. Calculate the torque.

15. A method for measuring magneto-induced torque, characterized in that, The magneto-induced torque measurement method is carried out by the magneto-induced torque measurement device according to claim 12, and the magneto-induced torque measurement method includes the following steps: B1. Fix the object to be measured (9) on the object-carrying plate (30). B2. Place the magneto-induced torque measurement device on a horizontal plane, and adjust the tightness of the elastic assembly through the wire fixer (40) to make the object-carrying plate (30) in a balanced position, and let it stand still until the object-carrying plate (30) stops swinging. B3. Place the magneto-induced torque measurement device into the magnetic resonance imaging device, and after standing still until it is stable, read and record the tension of the force sensor (46). B4. Drive the frame assembly (2) to rotate relative to the base (1) within the angle range of 0 to 360°. After rotating 10° each time, let the magneto-induced torque measurement device stand still until the object-carrying plate (30) remains stable, and read and record the tension of the force sensor (46). B5. Calculate the torque.

16. A measuring method of a magneto-induced torque measuring device, characterized in that, The magneto-induced torque measurement method is carried out by the magneto-induced torque measurement device according to claim 11, and the magneto-induced torque measurement method includes the following steps: Select to use the object-carrying plate (30) or the vehicle (6) to measure the magneto-induced torque; If the vehicle (6) is selected to measure the magneto-induced torque, the magneto-induced torque measurement method includes the following steps: A1. Fix the rotating shaft (25) through the fixing member (8), install the carrier (6) with the object to be measured (9) thereon into the magneto-torque measuring device, connect the top plate (203) and the carrier (6) through the wire body (70), and connect the carrier (6) and the rotating shaft (25) through the elastic wire (71); A2. Place the magneto-torque measuring device on a horizontal plane and let it stand still until the carrier (6) stops swinging; A3. Place the magneto-torque measuring device into the magnetic resonance imaging device, let it stand still until it is stable, and obtain the torsional angle of deflection of the third pointer (60) according to the position of the third pointer (60); A4. Drive the frame assembly (2) to rotate relative to the base (1) within the angular range of 0 to 360°, let the magneto-torque measuring device stand still after every 10° rotation until the third pointer (60) remains stable, obtain the corresponding torsional angle according to the position of the third pointer (60) and record it; A5. Calculate the torque.

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