Magnetic field measurement device and magnetic field measurement method

Abstract

The invention discloses a magnetic field measuring device and a magnetic field measuring method. The magnetic field measuring device comprises a base used for supporting a multi-pole magnet to be measured; the first rotating disc and the second rotating disc are oppositely arranged on the base and are rotationally connected with the base, and the axis of the first rotating disc coincides with the axis of the second rotating disc; the first positioning tool is connected to the side, facing the second rotary disc, of the first rotary disc. The second positioning tool is connected to the side, facing the first rotary disc, of the second rotary disc. The first positioning tool is provided with a plurality of first limiting points, the second positioning tool is provided with a plurality of second limiting points which are in one-to-one correspondence with the plurality of first limiting points, the wires are wound around the corresponding first limiting points and the second limiting points and penetrate through the multi-pole magnet to be detected, and the parts, located between the first limiting points and the second limiting points, of the wires are parallel to the axis of the first rotating disc. The distance between the first rotating disc and the axis of the first rotating disc is smaller than the inner circumference radius of the to-be-measured multi-pole magnet. The magnetic field measuring device reduces the production and use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-pole magnets, and in particular to a magnetic field measuring device and a magnetic field measuring method. Background Art

[0002] The rotating coil measurement method is the most commonly used magnetic field measurement method for accelerator multipole magnets. The traditional rotating coil measurement system consists of measuring coils, coil support adjustment platform, motor drive part, integrator and other sub-devices. The motor drives the measuring coil to rotate in the magnet aperture, and the measuring coil cuts the magnetic lines to generate an induced voltage signal. The signal acquisition device collects the induced voltage signal and integrates the voltage signal in segments according to the encoder angle trigger, thereby obtaining the waveform of the magnetic flux through the coil changing with the spatial angle, and obtaining the gradient integral field, magnetic center, spatial harmonics and other related magnetic field information through subsequent data processing.

[0003] However, the manufacturing process of the measuring coil is complex and requires high precision, resulting in high production costs. At the same time, after the measuring coil is manufactured, it is limited by the optimal value of the measuring magnet aperture and is not completely applicable to all magnets. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a magnetic field measuring device, which has a low production cost and can be adapted to corresponding low-cost parts according to the aperture of the magnet to be measured, thereby reducing the application cost.

[0005] An embodiment of the first aspect of the present application provides a magnetic field measuring device, comprising: a base, the base is used to support a multi-pole magnet to be measured; a first turntable and a second turntable, the first turntable and the second turntable are arranged opposite to each other on the base and are rotatably connected to the base respectively, and the axis of the first turntable coincides with the axis of the second turntable; a first positioning tool and a second positioning tool, the first positioning tool is connected to a side of the first turntable facing the second turntable, and the second positioning tool is connected to a side of the second turntable facing the first turntable; the first positioning tool has a plurality of first limiting points, and the second positioning tool has a plurality of second limiting points corresponding to the plurality of first limiting points one by one, a wire is wound around the corresponding first limiting points and the second limiting points, and is passed through the multi-pole magnet to be measured, and the wire located between the first limiting point and the second limiting point is parallel to the axis of the first turntable, and the distance between the wire and the axis of the first turntable is less than the inner radius of the multi-pole magnet to be measured.

[0006] According to the magnetic field measuring device of the embodiment of the present application, by winding the wire through the first limit point on the first positioning fixture and the second limit point on the second positioning fixture, and passing through the multi-pole magnet to be measured, at the same time, the wire located between the first limit point and the second limit point is parallel to the axis of the first turntable, and the distance between the wire and the axis of the first turntable is less than the inner radius of the multi-pole magnet to be measured, so that the wire can be driven by the first turntable and the second turntable, and rotate around the axis of the first turntable with a radius less than the inner radius of the multi-pole magnet to be measured, so as to cut the magnetic flux lines of the multi-pole magnet to be measured, and the wire can obtain a voltage signal when cutting the magnetic flux lines, and the magnetic field information can be finally obtained according to the voltage signal. Compared with the rotating coil in the prior art, the measuring device has a lower production cost, and the positions of the first limit point and the second limit point on the first positioning fixture and the second fixture can be changed as needed to be applied to the multi-pole magnet to be measured with different inner diameters, thereby increasing the application range and reducing the use cost.

[0007] In a possible implementation of the present application, the first limit points include a first limit point I, a first limit point II, a first limit point III, and a first limit point IV, and the second limit points include corresponding second limit points I, a second limit point II, a second limit point III, and a second limit point IV; The distance between the wire between the first limiting point I and the second limiting point I and the axis of the first rotating disk is R1; The distance between the wire between the first limiting point II and the second limiting point II and the axis of the first rotating disk is R2; The distance between the wire between the first limiting point III and the second limiting point III and the axis of the first rotating disk is R3; The distance between the wire between the first limit point IV and the second limit point IV and the axis of the first rotating disk is R4; Among them, R1, R2, R3, and R4 are all different.

[0008] In a possible implementation of the present application, the wire includes a first wire and a second wire; The first conductor is wound around the second limiting point I, the first limiting point I, the first limiting point II and the second limiting point II in sequence; The second conducting wire passes through the second limiting point III, the first limiting point III, the first limiting point IV and the second limiting point IV in sequence.

[0009] In a possible implementation of the present application, the first positioning tool includes a first positioning member, the first positioning member is provided with a first groove, the first groove includes a first bottom surface and a first side surface a and a first side surface b perpendicular to the first bottom surface; The second positioning tool comprises a second positioning member, the second positioning member is provided with a second groove corresponding to the first groove, the second groove comprises a second bottom surface and a second side surface a and a second side surface b which are perpendicular to the second bottom surface; The first side surface a and the second side surface a are in the same plane, the first side surface b and the second side surface b are in the same plane, and the first bottom surface and the second bottom surface are in the same plane; The first limit point I is located at the intersection line 1 of the first side surface a and the first bottom surface, the first limit point III is located at the intersection line 2 of the first side surface b and the first bottom surface, the second limit point I is located at the intersection line 3 of the second side surface a and the second bottom surface, and the second limit point III is located at the intersection line 4 of the second side surface b and the second bottom surface.

[0010] In a possible implementation of the present application, the first positioning member is provided with a third groove, and the third groove includes a third bottom surface and a third side surface a and a third side surface b perpendicular to the third bottom surface; The second positioning tool comprises a second positioning member, the second positioning member is provided with a fourth groove corresponding to the third groove, the fourth groove comprises a fourth bottom surface and a fourth side surface a and a fourth side surface b perpendicular to the fourth bottom surface; The third side surface a and the fourth side surface a are in the same plane, the third side surface b and the fourth side surface b are in the same plane, and the third bottom surface and the fourth bottom surface are in the same plane; The first limit point IV is located at the intersection line 5 of the third side surface a and the third bottom surface, the first limit point II is located at the intersection line 6 of the third side surface b and the third bottom surface, the second limit point IV is located at the intersection line 7 of the fourth side surface a and the fourth bottom surface, and the second limit point II is located at the intersection line 8 of the fourth side surface b and the fourth bottom surface.

[0011] In a possible implementation of the present application, the first positioning tool further includes a first bottom press fitting, which is spaced apart on a side of the first positioning member facing the first rotating disk, and along the axis direction of the first rotating disk, a projection of the first bottom surface is located on the first bottom press fitting; The second positioning tool also includes a second bottom press fitting, which is spaced apart on a side of the second positioning member facing the second turntable. Along the axis direction of the second turntable, the projection of the second bottom surface is located on the second bottom press fitting.

[0012] In a possible implementation of the present application, the first positioning tool also includes a first side press-fit part, and the first side press-fit part is provided with at least four first limit grooves, and the at least four first limit grooves respectively limit the first limit point I, the first limit point II, the first limit point III and the first limit point IV.

[0013] In a possible implementation of the present application, one of the first rotating disk and the second rotating disk is provided with a wiring member, and the other is provided with a winding member, and the winding member includes a first winding member and a second winding member; One end of the first wire is connected to the connecting member, and the other end is wound around the second limiting point I, the first limiting point I, the first winding member, the first limiting point II and the second limiting point II in sequence, and is connected to the connecting member; One end of the second conducting wire is connected to the connecting member, and the other end is wound around the second limiting point III, the first limiting point III, the second winding member, the first limiting point IV and the second limiting point IV in sequence, and is connected to the connecting member.

[0014] In a possible implementation of the present application, it also includes a tension adjusting member, which can be movably connected to the first turntable in a direction perpendicular to the axis of the first turntable, and the winding member is connected to the first turntable through the tension adjusting member.

[0015] In a possible implementation of the present application, a guide member is also included; The tension adjusting member and the first positioning tool are spaced apart along the axial direction of the first turntable, and the guide member is spaced apart on a side of the tension adjusting member facing the first positioning tool along a direction perpendicular to the axis of the first turntable.

[0016] The embodiment of the second aspect of the present application provides a magnetic field measurement method, using the magnetic field measurement device in the above embodiment, comprising the following steps: Step 1, driving the first turntable and the second turntable to rotate synchronously; Step 3: Collect the voltage signal of the conductor and obtain the magnetic field information according to the voltage signal.

[0017] According to the magnetic field measurement method of the embodiment of the present application, the cost of magnetic field measurement is reduced by adopting the above-mentioned magnetic field measurement device.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a structural schematic diagram of a magnetic field measuring device according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of an angle of some components in a magnetic field measurement device according to an embodiment of the present invention; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 yes Figure 3 The enlarged view of point B in the middle; Figure 5 is a structural schematic diagram of some components in a magnetic field measuring device according to an embodiment of the present invention from another angle; Figure 6 yes Figure 5 Enlarged view of point C in the middle; Figure 7 yes Figure 6 The enlarged view of point D in the middle; Figure 8 1 is a schematic structural diagram of an angle of the first rotating disk in the magnetic field measuring device according to an embodiment of the present invention.

[0020] Reference numerals: Magnetic field measuring device 100, Base 10, first turntable 11, first winding member 110, second winding member 111, tension adjusting member 112, guide member 113, tension meter 114, second turntable 12, connecting member 121, first bracket 13, second bracket 14, first motor 15, second motor 16, tension adjusting bracket 17, The first limiting point 20, the first limiting point I 21, the first limiting point II 22, the first limiting point III 23, the first limiting point IV 24, The second limiting point 30, the second limiting point I 31, the second limiting point II 32, the second limiting point III 33, the second limiting point IV 34, The first positioning tool 40, the first positioning member 41, the first groove 411, the first bottom surface 4111, the first side surface a4112, the first side surface b4113, the intersection line 1 4114, the intersection line 2 4115, the third groove 412, the third bottom surface 4121, the third side surface a4122, the third side surface b4123, the intersection line 5 4124, the intersection line 6 4125, the first bottom press-fit member 42, the first side press-fit member 43, the first limiting groove 431, the first limiting groove I 4311, the first limiting groove II 4312, the first limiting groove III 4313, the first limiting groove IV 4314, The second positioning tool 50, the second positioning member 51, the second groove 511, the second bottom surface 5111, the second side surface a5112, the second side surface b5113, the intersection line three 5114, the intersection line four 5115, the fourth groove 512, the fourth bottom surface 5121, the fourth side surface a5122, the fourth side surface b5123, the intersection line seven 5124, the intersection line eight 5125, the second bottom press-fit member 52, the second side press-fit member 53, the second limiting groove 531, the second limiting groove I 5311, the second limiting groove II 5312, the second limiting groove III 5313, the second limiting groove IV 5314, The conductive wire 60 , the first conductive wire 61 , and the second conductive wire 62 . DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Please refer to the following Figure 1-Figure 8 The magnetic field measuring device 100 according to the embodiment of the present application is described.

[0024] Reference Figure 1-Figure 7 The embodiment of the first aspect of the present application provides a magnetic field measuring device 100, including a base 10, a first turntable 11 and a second turntable 12, and a first positioning tool 40 and a second positioning tool 50.

[0025] The base 10 is used to support the multi-pole magnet to be tested. For example, the base 10 can be provided with a magnet mounting bracket. The base 10 is also used to support the first turntable 11 and the second turntable 12. For example, the base 10 can be provided with a first bracket 13 for supporting the first turntable 11 and a second bracket 14 for supporting the second turntable 12.

[0026] It is understandable that the magnet mounting bracket and the base 10 can be integrally formed, fixedly connected, detachably connected, etc. The first bracket 13 and the base 10 can be integrally formed, fixedly connected, detachably connected, etc. The second bracket 14 and the base 10 can be integrally formed, fixedly connected, detachably connected, etc.

[0027] The first rotating disk 11 and the second rotating disk 12 are arranged opposite to the base 10 so as to pull the wire 60 between the first rotating disk 11 and the second rotating disk 12. The first rotating disk 11 and the second rotating disk 12 are rotatably connected to the base 10 respectively, and the axis of the first rotating disk 11 coincides with the axis of the second rotating disk 12, so that the wire 60 connected between the first rotating disk 11 and the second rotating disk 12 can rotate driven by the first rotating disk 11 and the second rotating disk 12.

[0028] In some embodiments, the base 10 includes a left base, a middle base and a right base, the first turntable 11 is arranged on the left base, the second turntable 12 is arranged on the right base, and the multi-pole magnet to be measured can be arranged on the middle base. The first turntable 11 can move relative to the left base, for example, it can move in the horizontal direction or the vertical direction. The second turntable 12 can move relative to the left base, for example, it can move in the horizontal direction or the vertical direction.

[0029] The first positioning fixture 40 is connected to the side of the first turntable 11 facing the second turntable 12, and the second positioning fixture 50 is connected to the side of the second turntable 12 facing the first turntable 11, that is, the first positioning fixture 40 and the second positioning fixture 50 are arranged between the first turntable 11 and the second turntable 12 and are arranged relative to each other, so that the first positioning fixture 40 and the second fixture can position the wire 60 stretched between the first turntable 11 and the second turntable 12, so that the wire 60 rotates at a certain radius.

[0030] The first positioning fixture 40 has a plurality of first limiting points 20, and the second positioning fixture 50 has a plurality of second limiting points 30 corresponding to the plurality of first limiting points 20. The wire 60 passes through the corresponding first limiting points 20 and second limiting points 30, and is passed through the multi-pole magnet to be tested. By passing the wire 60 around the first limiting points 20 and second limiting points 30, the wire 60 can be accurately limited. The wire 60 located between the first limiting points 20 and the second limiting points 30 is parallel to the axis of the first turntable 11, so that the wire 60 can rotate with the first turntable 11 and the second turntable 12 at a certain radius and around the axis of the first turntable 11. The distance between the wire 60 and the axis of the first turntable 11 is less than the inner radius of the multi-pole magnet to be tested. In this way, it can rotate inside the multi-pole magnet to be tested and cut the magnetic flux lines of the multi-pole magnet to be tested.

[0031] Therefore, refer to Figure 1-Figure 7 According to the magnetic field measuring device 100 of the embodiment of the present application, the wire 60 is wound around the first limit point 20 on the first positioning fixture 40 and the second limit point 30 on the second positioning fixture 50, and the multi-pole magnet to be measured is passed through. At the same time, the wire 60 located between the first limit point 20 and the second limit point 30 is parallel to the axis of the first turntable 11, and the distance between the wire 60 and the axis of the first turntable 11 is less than the inner radius of the multi-pole magnet to be measured. In this way, the wire 60 can be driven by the first turntable 11 and the second turntable 12, and rotate around the axis of the first turntable 11 with a radius less than the inner radius of the multi-pole magnet to be measured, so as to cut the magnetic flux of the multi-pole magnet to be measured. The wire 60 can obtain a voltage signal when cutting the magnetic flux, and the magnetic field information can be finally obtained according to the voltage signal. Compared with the rotating coil in the prior art, the measuring device has a lower production cost, and the positions of the first limit point 20 and the second limit point 30 on the first positioning fixture 40 and the second fixture can be changed as needed to be applied to the multi-pole magnet to be measured with different inner diameters, thereby increasing the application range and reducing the use cost.

[0032] In some embodiments, reference Figure 1 , the magnetic field measuring device 100 further includes a driving assembly for driving the first rotating disk 11 and the second rotating disk 12 to rotate. Exemplarily, the driving assembly may include a driving motor, for example, the driving motor may include a first motor 15 for driving the first rotating disk 11 to rotate and a second motor 16 for driving the second rotating disk 12 to rotate. Of course, the first rotating disk 11 and the second rotating disk 12 may also be driven to rotate by one driving motor. Correspondingly, the first motor 15 is connected to the first rotating disk 11 via a first reducer, and the second motor 16 is connected to the second rotating disk 12 via a second reducer.

[0033] In some embodiments, the magnetic field measuring device 100 further includes a signal transmission component for transmitting a voltage signal obtained when the wire 60 cuts the magnetic flux line. Exemplarily, a first slip ring brush is connected between the first rotating disk 11 and the first reducer, a second slip ring brush is connected between the second rotating disk 12 and the second reducer, and at least one of the first slip ring brush and the second slip ring brush is connected to the wire 60.

[0034] In some embodiments, the magnetic field measurement device 100 also includes a control system, which includes a signal acquisition module and a data processing module. The signal acquisition module acquires voltage signals and transmits the voltage signals to the data processing module, and the data processing module obtains magnetic field information based on the voltage signals.

[0035] In some embodiments, the conductor 60 is a tension wire, so as to better cut the magnetic flux lines. The tension wire can be made of titanium aluminum vanadium, beryllium copper and other materials.

[0036] In some embodiments of the present application, reference Figure 3 and Figure 6 The first limiting point 20 includes a first limiting point I21, a first limiting point II22, a first limiting point III23, and a first limiting point IV24, and the second limiting point 30 includes a corresponding second limiting point I31, a second limiting point II32, a second limiting point III33, and a second limiting point IV34; the distance between the wire between the first limiting point I21 and the second limiting point I31 and the axis of the first turntable is R1; the distance between the wire between the first limiting point II22 and the second limiting point II32 and the axis of the first turntable is R2; the distance between the wire between the first limiting point III23 and the second limiting point III33 and the axis of the first turntable is R3; the distance between the wire between the first limiting point IV24 and the second limiting point IV34 and the axis of the first turntable is R4; wherein R1, R2, R3, and R4 are all different.

[0037] By setting the first limit point I21 and the second limit point I31, the first limit point II22 and the second limit point II32, the first limit point III23 and the second limit point III33, and the first limit point IV24 and the second limit point IV34 with different distances from the axis of the first turntable, the wire can cut magnetic flux lines of different diameters to obtain different voltage signals, thereby facilitating the acquisition of more magnetic field information.

[0038] Specifically, R1, R2, R3, R4 can be R1, R2, R3, R4 from largest to smallest; or, R1, R2, R4, R3; or, R1, R4, R2, R3, etc.

[0039] In some embodiments of the present application, reference Figure 3 and Figure 6The conductor includes a first conductor 61 and a second conductor 62; the first conductor 61 sequentially winds around the second limiting point I31, the first limiting point I21, the first limiting point II22 and the second limiting point II32; the second conductor 62 sequentially winds around the second limiting point III33, the first limiting point III23, the first limiting point IV24 and the second limiting point IV34.

[0040] The first wire 61 is wound around the second limiting point I31, the first limiting point I21, the first limiting point II22, and the second limiting point II32 in sequence, so that the incoming and outgoing ends of the first wire 61 are both located at the first positioning fixture 40, reducing the number of wiring times and making the overall tension of the first wire 61 more uniform. Similarly, the second wire 62 is wound around the second limiting point III33, the first limiting point III23, the first limiting point IV24, and the second limiting point IV34 in sequence, so that the incoming and outgoing ends of the second wire 62 are both located at the first positioning fixture 40, reducing the number of wiring times and making the overall tension of the first wire 61 more uniform.

[0041] Of course, it is understandable that a plurality of wires may be provided, that is, a wire is connected between each corresponding first limiting point 20 and second limiting point 30 .

[0042] In some embodiments of the present application, reference Figure 4 and Figure 7 The first positioning fixture 40 includes a first positioning member 41, the first positioning member 41 is provided with a first groove 411, the first groove 411 includes a first bottom surface 4111 and a first side surface a4112 and a first side surface b4113 perpendicular to the first bottom surface 4111; the second positioning fixture 50 includes a second positioning member 51, the second positioning member 51 is provided with a second groove 511 corresponding to the first groove 411, the second groove 511 includes a second bottom surface 5111 and a second side surface a5112 and a second side surface b5113 perpendicular to the second bottom surface 5111; the first side surface a4112 and the second side surface a5112 are in the same plane, the first side surface b4113 and the second side surface b5113 are in the same plane, and the first bottom surface 4111 and the second bottom surface 5111 are in the same plane; the first limiting point Ⅰ21 is located at the intersection line 1 4114 of the first side surface a4112 and the first bottom surface 4111, the first limiting point Ⅲ23 is located at the intersection line 2 4115 of the first side surface b4113 and the first bottom surface 4111, the second limiting point Ⅰ31 is located at the intersection line 3 5114 of the second side surface a5112 and the second bottom surface 5111, and the second limiting point Ⅲ33 is located at the intersection line 4 5115 of the second side surface b5113 and the second bottom surface 5111.

[0043] By setting the first groove 411 on the first positioning member 41, the first limiting point I21 and the first limiting point III23 are respectively set at the intersection line 1 4114 of the first side surface a4112 of the first groove 411 and the first bottom surface 4111 and the intersection line 2 4115 of the first side surface b4113 of the first groove 411 and the first bottom surface 4111, which is convenient for processing and limiting the first wire 61 and the second wire 62. At the same time, one groove can form the first limiting point I21 and the first limiting point III23, which improves the utilization rate of the groove and reduces the processing cost.

[0044] Similarly, a second groove 511 is provided in the second positioning member 51, and the second limiting point I31 and the second limiting point III33 are respectively provided at the intersection line three 5114 of the second side surface a5112 of the second groove 511 and the second bottom surface 5111 and the intersection line four 5115 of the second side surface b5113 of the second groove 511 and the second bottom surface 5111, so as to facilitate processing and limit the first wire 61 and the second wire 62. At the same time, one groove can form the second limiting point I31 and the second limiting point III33, thereby improving the utilization rate of the groove and reducing the processing cost.

[0045] The first limit point I21 is set at the intersection line 1 4114, the first limit point III23 is set at the intersection line 2 4115, the second limit point I31 is set at the intersection line 3 5114, and the second limit point III33 is set at the intersection line 4 5115, which is convenient for processing and design. At the same time, the contact area between the wire and the limit point is increased, the pressure of the limit point on the wire is reduced, the wire is not easy to break, and the service life of the wire is extended.

[0046] In some embodiments, the first limiting point 20 and the second limiting point 30 may also be disposed on a cylindrical limiting member.

[0047] In some embodiments of the present application, reference Figure 4 and Figure 7 The first positioning member 41 is provided with a third groove 412, and the third groove 412 includes a third bottom surface 4121 and a third side surface a4122 and a third side surface b4123 perpendicular to the third bottom surface 4121; The second positioning fixture 50 includes a second positioning member 51, the second positioning member 51 is provided with a fourth groove 512 corresponding to the third groove 412, the fourth groove 512 includes a fourth bottom surface 5121 and a fourth side surface a5122 and a fourth side surface b5123 perpendicular to the fourth bottom surface 5121; The third side surface a4122 and the fourth side surface a5122 are in the same plane, the third side surface b4123 and the fourth side surface b5123 are in the same plane, and the third bottom surface 4121 and the fourth bottom surface 5121 are in the same plane; In some embodiments, the first bottom surface 4111 , the second bottom surface 5111 , the third bottom surface 4121 , and the fourth bottom surface 5121 may all be in the same plane.

[0048] The first limiting point IV24 is located at the intersection line V 4124 of the third side surface a4122 and the third bottom surface 4121, the first limiting point II22 is located at the intersection line VI 4125 of the third side surface b4123 and the third bottom surface 4121, the second limiting point IV34 is located at the intersection line VII 5124 of the fourth side surface a5122 and the fourth bottom surface 5121, and the second limiting point II32 is located at the intersection line VIII 5125 of the fourth side surface b5123 and the fourth bottom surface 5121.

[0049] By setting the third groove 412 on the first positioning member 41, the first limiting point IV24 and the first limiting point II22 are respectively set at the intersection line V 4124 of the third side surface a4122 of the third groove 412 and the third bottom surface 4121 and the intersection line VI 4125 of the third side surface b4123 of the third groove 412 and the third bottom surface 4121, which is convenient for processing and limiting the first wire 61 and the second wire 62. At the same time, one groove can form the first limiting point IV24 and the first limiting point II22, which improves the utilization rate of the groove and reduces the processing cost.

[0050] Similarly, a fourth groove 512 is provided in the second positioning member 51, and the second limiting point IV34 and the second limiting point II32 are respectively provided at the intersection line seven 5124 of the fourth side surface a5122 of the fourth groove 512 and the fourth bottom surface 5121 and the intersection line eight 5125 of the fourth side surface b5123 of the fourth groove 512 and the fourth bottom surface 5121, which is convenient for processing and for limiting the first wire 61 and the second wire 62. At the same time, one groove can form the second limiting point IV34 and the second limiting point II32, which improves the utilization rate of the groove and reduces the processing cost.

[0051] The first limit point IV24 is set at the intersection line five 4124, the first limit point II22 is set at the intersection line six 4125, the second limit point IV34 is set at the intersection line seven 5124, and the second limit point II32 is set at the intersection line eight 5125, which is convenient for processing and design. At the same time, the contact area between the wire and the limit point is increased, the pressure of the limit point on the wire is reduced, the wire is not easy to break, and the service life of the wire is extended.

[0052] In some embodiments, the first positioning member 41 and the second positioning member 51 are detachably connected to the first turntable 11 and the second turntable 12, respectively, and can be exemplarily connected by snap-fit ​​connection, threaded connection, or connection through a connecting member, etc. Different first positioning members 41 and second positioning members 51 can be replaced according to different inner diameters of the multi-pole magnets to be tested.

[0053] In some embodiments of the present application, reference Figure 3 and Figure 6 The first positioning tool 40 also includes a first bottom press-fit piece 42 , which is spaced apart at one side of the first positioning piece 41 facing the first turntable 11 , and along the axial direction of the first turntable 11 , the projection of the first bottom surface 4111 is located at the first bottom press-fit piece 42 .

[0054] The first bottom press fitting 42 is provided to press the first wire 21 into the first groove 411 , thereby preventing the first wire 21 from escaping from the first groove 411 during winding and rotation, thereby facilitating winding and positioning.

[0055] Along the axial direction of the first turntable 11, the projection of the first bottom surface 4111 is located on the first bottom press-fit piece 42. Exemplarily, the lowest point of the first bottom press-fit piece 42 in the vertical direction is lower than the lowest point of the first groove 411, so that the first wire 21 wound below the bottom of the bottom press-fit piece is lower than the lowest point of the first groove 411, making it difficult for the first wire 21 to escape from the first groove 411.

[0056] The second positioning tool 50 also includes a second bottom press-fit piece 52 , which is spaced apart on the side of the second positioning piece 51 facing the second turntable 12 . Along the axial direction of the second turntable 12 , the projection of the second bottom surface 5111 is located on the second bottom press-fit piece 52 .

[0057] The second bottom press fitting 52 is provided to press the second wire 62 into the second groove 511 , thereby preventing the second wire 62 from escaping from the second groove 511 during winding and rotation, thereby facilitating winding and positioning.

[0058] The design principle of the second bottom press-fit member 52 is the same as that of the first bottom press-fit member 42 , and will not be described in detail herein.

[0059] In some embodiments, the first bottom press fitting 42 and the second bottom press fitting 52 can be fixed to the first turntable 11 and the second turntable 12 respectively, and can be integrally formed or fixed by a connector, etc. The first bottom press fitting 42 and the second bottom press fitting 52 can be cylindrical, etc.

[0060] In some embodiments of the present application, reference Figure 3 and Figure 6 The first positioning tool 40 also includes a first side press-fit piece 43, and the first side press-fit piece 43 is provided with at least four first limiting grooves 431, and the at least four first limiting grooves 431 respectively limit the first limiting point I, the first limiting point II, the first limiting point III and the first limiting point IV.

[0061] By providing at least four first limiting grooves 431, the first wire and the second wire are always pressed laterally at the first limiting point I, the first limiting point II, the first limiting point III and the first limiting point IV, so as to maintain the stability of the first wire and the second wire in the lateral direction.

[0062] Specifically, the first limiting groove 431 may be parallel to the first groove. The first limiting groove 431 includes a first limiting groove I 4311, a first limiting groove II 4312, a first limiting groove III 4313 and a first limiting groove IV 4314, wherein the minimum distance P1 between the first limiting groove I 4311 and the axis of the first rotating disk is greater than R1, the minimum distance P2 between the first limiting groove II 4312 and the axis of the first rotating disk is greater than R2, the maximum distance P3 between the first limiting groove III 4313 and the axis of the first rotating disk is less than R3, and the maximum distance P4 between the first limiting groove IV 4314 and the axis of the first rotating disk is less than R4.

[0063] In some embodiments, the first side press-fit piece may also be a cylindrical structure or the like.

[0064] Correspondingly, the second positioning tool also includes a second side press-fit piece, which is provided with at least four second limiting grooves 531, and the at least four second limiting grooves 531 respectively limit the second limiting point I, the second limiting point II, the second limiting point III and the second limiting point IV.

[0065] By providing at least four second limiting grooves 531, the first wire and the second wire are always pressed laterally at the second limiting point I, the second limiting point II, the second limiting point III and the second limiting point IV, so as to maintain the stability of the first wire and the second wire in the lateral direction.

[0066] Specifically, the second limiting groove 531 may be parallel to the second groove. The second limiting groove 531 includes a second limiting groove I 5311, a second limiting groove II 5312, a second limiting groove III 5313 and a second limiting groove IV 5314, wherein the minimum distance P1 between the second limiting groove I 5311 and the axis of the first rotating disk is greater than R1, the minimum distance P2 between the second limiting groove II 5312 and the axis of the first rotating disk is greater than R2, the maximum distance P3 between the second limiting groove III 5313 and the axis of the first rotating disk is less than R3, and the maximum distance P4 between the second limiting groove IV 5314 and the axis of the first rotating disk is less than R4.

[0067] In some embodiments, the first side press-fit piece 43 may also be a cylindrical structure or the like.

[0068] In some embodiments, the first side press-fit piece 43 and the second side press-fit piece 53 are detachably connected to the first turntable 11 and the second turntable 12, respectively, and can be exemplarily connected by snap-fit, threaded, or connected by a connector, etc. Different first side press-fit pieces 43 and second side press-fit pieces 53 can be replaced according to different inner diameters of the multi-pole magnets to be tested.

[0069] In some embodiments of the present application, reference Figure 3 and Figure 6 One of the first rotating disk 11 and the second rotating disk 12 is provided with a connecting piece 121, and the other is provided with a winding piece, and the winding piece includes a first winding piece 110 and a second winding piece 111; One end of the first wire 61 is connected to the connecting member 121, and the other end is wound through the second limiting point I31, the first limiting point I21, the first winding member 110, the first limiting point II22 and the second limiting point II32 in sequence, and is connected to the connecting member 121; One end of the second wire 62 is connected to the connecting piece 121 , and the other end is wound around the second limiting point III33 , the first limiting point III23 , the second winding piece 111 , the first limiting point IV24 , and the second limiting point IV34 in sequence, and is connected to the connecting piece 121 .

[0070] The connection piece 121 can be used to connect one end of the first wire 61 and the second wire 62. The winding piece can change the direction of the first wire 61 and the second wire 62 and wind back to the connection piece 121. There can be multiple connection pieces 121, and one end of each wire corresponds to one connection piece 121.

[0071] Specifically, the connecting piece 121 may be disposed on the first turntable 11 , and the winding piece is disposed on the second turntable 12 ; or, the connecting piece 121 may be disposed on the second turntable 12 , and the winding piece is disposed on the first turntable 11 .

[0072] Exemplarily, the winding member may be provided as an I-shaped structure or the like.

[0073] In some embodiments of the present application, reference Figure 6 and Figure 8 The magnetic field measuring device 100 further includes a tension adjusting member 112 , which is movably connected to the first turntable 11 along a direction perpendicular to the axis of the first turntable 11 , and the winding member is connected to the first turntable 11 through the tension adjusting member 112 .

[0074] By providing a tension adjusting member 112 movably connected to the first rotating disk 11 in a direction perpendicular to the axis of the first rotating disk 11, the movement of the tension adjusting member 112 can adjust the position of the winding member, and adjusting the position of the winding member can tighten or loosen the wire.

[0075] In some embodiments, the tension adjusting member 112 is connected to the first rotating disk 11 through the tension adjusting bracket 17. For example, the tension adjusting member 112 can be a long bolt, the tension adjusting bracket 17 is provided with threads, and the tension adjusting member 112 is movably connected to the tension adjusting bracket 17 by being threaded.

[0076] It is understandable that the tension adjusting member 112 and the first rotating disk 11 may be movably connected in other ways, for example, by sliding connection.

[0077] In some embodiments, a tension meter 114 is further included to observe the tension of the wire. The tension meter 114 is connected between the tension adjusting member 112 and the winding member.

[0078] In some embodiments, there are two tension adjusting members 112, and the two tension adjusting members 112 are symmetrically arranged on opposite sides of the first positioning member 41. The two tension adjusting members 112 correspond to the first winding member 110 and the second winding member 111, respectively.

[0079] In some embodiments of the present application, reference Figure 6 The magnetic field measuring device 100 also includes a guide member 113; the tension adjusting member 112 and the first positioning fixture 40 are spaced apart along the axial direction of the first turntable 11, and the guide member 113 is spaced apart on the side of the tension adjusting member 112 facing the first positioning fixture 40 along the direction perpendicular to the axis of the first turntable 11.

[0080] By providing the guide piece 113, the wire can be guided and diverted to prevent the wire from falling out of the side press fitting.

[0081] In some embodiments, two guide members 113 are provided, and the two guide members 113 correspond to two tension adjusting members 112 respectively.

[0082] The second aspect of the present application provides a magnetic field measurement method, which uses the magnetic field measurement device 100 in the above embodiment, and includes the following steps: Step 1, driving the first rotating disk 11 and the second rotating disk 12 to rotate synchronously; The first motor 15 and the second motor 16 drive the first turntable 11 and the second turntable 12 respectively, and make the first turntable 11 and the second turntable 12 rotate synchronously. The first turntable 11 and the second turntable 12 rotate synchronously and drive the first wire 61 to rotate with a radius R1 to cut the magnetic flux lines of the multi-pole magnet to be tested.

[0083] Step 2: Collect the voltage signal of the conductor and obtain the magnetic field information according to the voltage signal.

[0084] The signal acquisition module in the control system can be connected to the wire to obtain the voltage signal obtained when the wire cuts the magnetic flux lines, and the data processing module in the control system obtains the magnetic field information according to the voltage signal.

[0085] According to the magnetic field measurement method of the embodiment of the present application, the cost of magnetic field measurement is reduced by adopting the above-mentioned magnetic field measurement device 100.

[0086] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A magnetic field measuring device, characterized in that: include: A base, the base being used to support the multi-pole magnet to be tested; A first rotating disk and a second rotating disk, wherein the first rotating disk and the second rotating disk are disposed opposite to each other on the base and are rotatably connected to the base respectively, and an axis of the first rotating disk coincides with an axis of the second rotating disk; A first positioning fixture and a second positioning fixture, wherein the first positioning fixture is connected to a side of the first rotating disk facing the second rotating disk, and the second positioning fixture is connected to a side of the second rotating disk facing the first rotating disk; The first positioning tool has a plurality of first limit points, the second positioning tool has a plurality of second limit points corresponding to the plurality of first limit points one by one, the wire passes through the corresponding first limit points and the second limit points, and is passed through the multi-pole magnet to be measured, the wire located between the first limit points and the second limit points is parallel to the axis of the first turntable, and the distance between the wire and the axis of the first turntable is less than the inner radius of the multi-pole magnet to be measured.

2. The magnetic field measuring device according to claim 1, characterized in that: The first restriction sites include first restriction site I, first restriction site II, first restriction site III, and first restriction site IV, and the second restriction sites include corresponding second restriction sites I, second restriction sites II, second restriction sites III, and second restriction sites IV; The distance between the wire between the first limiting point I and the second limiting point I and the axis of the first rotating disk is R1; The distance between the wire between the first limiting point II and the second limiting point II and the axis of the first rotating disk is R2; The distance between the wire between the first limiting point III and the second limiting point III and the axis of the first rotating disk is R3; The distance between the wire between the first limit point IV and the second limit point IV and the axis of the first rotating disk is R4; Among them, R1, R2, R3, and R4 are all different.

3. The magnetic field measuring device according to claim 2, characterized in that: The wire comprises a first wire and a second wire; The first conductor is wound around the second limiting point I, the first limiting point I, the first limiting point II and the second limiting point II in sequence; The second conducting wire passes through the second limiting point III, the first limiting point III, the first limiting point IV and the second limiting point IV in sequence.

4. The magnetic field measuring device according to claim 2, characterized in that: The first positioning tool comprises a first positioning member, the first positioning member is provided with a first groove, the first groove comprises a first bottom surface and a first side surface a and a first side surface b which are perpendicular to the first bottom surface; The second positioning tool comprises a second positioning member, the second positioning member is provided with a second groove corresponding to the first groove, the second groove comprises a second bottom surface and a second side surface a and a second side surface b which are perpendicular to the second bottom surface; The first side surface a and the second side surface a are in the same plane, the first side surface b and the second side surface b are in the same plane, and the first bottom surface and the second bottom surface are in the same plane; The first limit point I is located at the intersection line 1 of the first side surface a and the first bottom surface, the first limit point III is located at the intersection line 2 of the first side surface b and the first bottom surface, the second limit point I is located at the intersection line 3 of the second side surface a and the second bottom surface, and the second limit point III is located at the intersection line 4 of the second side surface b and the second bottom surface.

5. The magnetic field measuring device according to claim 2, characterized in that: The first positioning member is provided with a third groove, and the third groove includes a third bottom surface and a third side surface a and a third side surface b perpendicular to the third bottom surface; The second positioning tool comprises a second positioning member, the second positioning member is provided with a fourth groove corresponding to the third groove, the fourth groove comprises a fourth bottom surface and a fourth side surface a and a fourth side surface b perpendicular to the fourth bottom surface; The third side surface a and the fourth side surface a are in the same plane, the third side surface b and the fourth side surface b are in the same plane, and the third bottom surface and the fourth bottom surface are in the same plane; The first limit point IV is located at the intersection line 5 of the third side surface a and the third bottom surface, the first limit point II is located at the intersection line 6 of the third side surface b and the third bottom surface, the second limit point IV is located at the intersection line 7 of the fourth side surface a and the fourth bottom surface, and the second limit point II is located at the intersection line 8 of the fourth side surface b and the fourth bottom surface.

6. The magnetic field measuring device according to claim 5, characterized in that: The first positioning tool further includes a first bottom press fitting, which is spaced apart and arranged on a side of the first positioning member facing the first rotating disk, and along the axis direction of the first rotating disk, a projection of the first bottom surface is located on the first bottom press fitting; The second positioning tool also includes a second bottom press fitting, which is spaced apart on a side of the second positioning member facing the second turntable. Along the axis direction of the second turntable, the projection of the second bottom surface is located on the second bottom press fitting.

7. The magnetic field measuring device according to claim 2, characterized in that: The first positioning tool also includes a first side press-fit piece, and the first side press-fit piece is provided with at least four first limiting grooves, and the at least four first limiting grooves respectively limit the first limiting point I, the first limiting point II, the first limiting point III and the first limiting point IV.

8. The magnetic field measuring device according to claim 3, characterized in that: One of the first rotating disk and the second rotating disk is provided with a connecting piece, and the other is provided with a winding piece, wherein the winding piece includes a first winding piece and a second winding piece; One end of the first wire is connected to the connecting member, and the other end is wound around the second limiting point I, the first limiting point I, the first winding member, the first limiting point II and the second limiting point II in sequence, and is connected to the connecting member; One end of the second conducting wire is connected to the connecting member, and the other end is wound around the second limiting point III, the first limiting point III, the second winding member, the first limiting point IV and the second limiting point IV in sequence, and is connected to the connecting member.

9. The magnetic field measuring device according to claim 8, characterized in that: It also includes a tension adjusting member, which is movably connected to the first turntable along a direction perpendicular to the axis of the first turntable, and the winding member is connected to the first turntable through the tension adjusting member.

10. The magnetic field measuring device according to claim 9, characterized in that: Also included is a guide member; The tension adjusting member and the first positioning tool are spaced apart along the axial direction of the first turntable, and the guide member is spaced apart on a side of the tension adjusting member facing the first positioning tool along a direction perpendicular to the axis of the first turntable.

11. A magnetic field measurement method, characterized in that: The magnetic field measuring device according to any one of claims 1 to 10 comprises the following steps: Step 1, driving the first turntable and the second turntable to rotate synchronously; Step 2: Collect the voltage signal of the conductor and obtain the magnetic field information according to the voltage signal.

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