Testing device for magnetic permeability of magnetic target material

Abstract

The utility model relates to the technical field of target material production, in particular to a device for testing the magnetic permeability of a magnetic target material. Comprising a base, a stand column is arranged on one side of the base, a cantilever capable of moving up and down is arranged on the stand column, a Hall probe is arranged on the cantilever, a magnetic source body is arranged under the Hall probe, the magnetic source body is fixed to the base, a movable base is further connected to the base in a sliding mode, and a vertical shaft is arranged on the movable base. The top end of the vertical shaft is rotatably connected with an objective table, the bottom surface of the objective table is higher than the top surface of the magnetic source body, the top surface of the objective table is lower than the bottom surface of the Hall probe, and the objective table is provided with a clamp for fixing a target material. The target material can be easily rotated by rotating the objective table.

Description

Technical Field

[0001] The utility model relates to the technical field of target material production, in particular to a device for testing the magnetic permeability of a magnetic target material. Background Art

[0002] The magnetic permeability (PTF) of a magnetic target is the ratio of the magnetic field passing from one side of the target to the other, and is an important technical indicator of a magnetic target. Patent application number 200620134206.4 discloses a device for testing the PTF of a disc-shaped magnetic target. The device includes a target platform, a horseshoe-shaped permanent magnet, and a Hall probe. The horseshoe-shaped permanent magnet is disposed at the bottom of the target platform, and the Hall probe is disposed at the top of the target platform. The lower middle portion of the target platform is integrally connected to a target platform support. A positioning recess is provided in the middle of the upper surface of the target platform, into which a calibration sleeve is inserted. Two positioning bearings are also provided on one side of the target platform. The device can test the PT of disc-shaped magnetic targets with diameters and thicknesses within a certain range. F, however, the planar size of the target table is larger than the planar size of the target material, the edge of the target material does not protrude from the edge of the target table, and the target table is fixed. For a target material without a center hole, force needs to be applied to keep one side of the target material in contact with the two bearings at all times during rotation. However, the target material is generally thin and it is not easy to apply force from the side. The target material can only be rotated by the friction force exerted by the fingers on the upper surface of the target material to keep one side in contact with the two bearings at all times. The friction between the target material and the target table or the washer must also be overcome. Therefore, it is relatively inconvenient to rotate the target material. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a device for testing the magnetic permeability of a magnetic target material in response to the above-mentioned technical deficiencies.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a testing device for the magnetic permeability of a magnetic target material, comprising a base, a column is provided on one side of the base, a cantilever that can move up and down is provided on the column, a Hall probe is provided on the cantilever, a magnetic source body is provided directly below the Hall probe, the magnetic source body is fixed on the base, and a movable seat is also slidably connected to the base, a vertical shaft is provided on the movable seat, the top end of the vertical shaft is rotatably connected to a stage, the bottom surface of the stage is higher than the top surface of the magnetic source body, the top surface of the stage is lower than the bottom surface of the Hall probe, and a clamp for fixing the target material is provided on the stage.

[0005] To further optimize the present technical solution, protrusions are provided on both sides of the top surface of the worktable, the clamp includes a clip, a guide groove is provided on the clip, a groove is provided on one side of the clip, the cross-section of the groove is an isosceles triangle, the thickness of the clip is greater than the height of the protrusion, a first threaded hole is provided on the protrusion, and a tightening bolt is connected to the first threaded hole so as to press the clip onto the worktable.

[0006] To further optimize the technical solution, the protrusion is in the shape of a cuboid, and the symmetry plane of the cuboid passes through the axis of the stage, and the guide groove is slidably connected to the protrusion.

[0007] To further optimize this technical solution, a through slot is provided on the column, a screw is rotatably connected to the column, one end of the cantilever is slidably connected to the through slot, a second threaded hole is provided on the cantilever, and the screw is threadedly connected to the second threaded hole.

[0008] To further optimize the technical solution, a third threaded hole is provided on the movable seat, and a positioning bolt is connected to the third threaded hole.

[0009] Compared with the prior art, the utility model has the following advantages: a column is provided on one side of the base, a cantilever which can move up and down is provided on the column, a Hall probe is provided on the cantilever, a movable seat is slidably connected to the base, a vertical shaft is provided on the movable seat, the top end of the vertical shaft is rotatably connected to a stage for placing the target material, a clamp for fixing the target material is provided on the stage, and during testing, the target material can be rotated by rotating the stage, which is relatively easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural schematic diagram of a testing device for the magnetic permeability of a magnetic target material.

[0011] Figure 2 for Figure 1 Magnified view of point I in the middle.

[0012] In the figure: 1. Base; 2. Magnetic source; 3. Column; 31. Through slot; 32. Screw; 4. Cantilever; 5. Hall probe; 6. Clamp; 61. Clip; 611. Guide slot; 612. Groove; 62. Clamping bolt; 7. Stage; 71. Bump; 8. Moving seat; 81. Vertical axis. DETAILED DESCRIPTION

[0013] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses or methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0014] Specific implementation method: Figure 1-2As shown, a magnetic target material permeability test device includes a base 1, a column 3 is provided on one side of the base 1, a cantilever 4 that can move up and down is provided on the column 3, a Hall probe 5 is provided on the cantilever 4, and the Hall probe 5 is electrically connected to a Gauss magnetometer. A magnetic source 2 is provided directly below the Hall probe 5, and the magnetic source 2 is a horseshoe-shaped permanent magnet. The Hall probe 5 is located in the middle of the two poles of the horseshoe-shaped permanent magnet. The magnetic source 2 is fixed on the base 1 and can be moved on the base 1. A sleeve with a rectangular cross-section is provided on the base 1, and the magnetic source 2 is fixed within the sleeve. A movable seat 8 is also slidably connected to the base 1, and the movable seat 8 can move toward and away from the column 3. The movable seat 8 is provided with a vertical shaft 81, which is perpendicular to the base 1. The top of the vertical shaft 81 is rotatably connected to a stage 7. The bottom surface of the stage 7 is higher than the top surface of the magnetic source 2, and the top surface of the stage 7 is lower than the bottom surface of the Hall probe 5. The stage 7 is provided with a clamp 6 for fixing the target material. The base 1, column 3, cantilever 4, movable seat 8, stage 7, and clamp 6 are all made of non-ferromagnetic materials. The height of the magnetic source 2 is designed so that when the Hall probe 5 is close to the upper surface of the stage 7, the Gauss magnetometer reading is 825±50 Gauss.

[0015] Specifically, protrusions 71 are provided on both sides of the top surface of the stage 7. The two protrusions 71 are symmetrical about the axis of the stage 7. There are two clamps 6, each including a clip 61. The clip 61 is provided with a guide groove 611. A groove 612 is provided on one side of the clip 61. The cross-section of the groove 612 is an isosceles triangle. The thickness of the clip 61 is greater than the height of the protrusion 71. The protrusion 71 is provided with a first threaded hole, preferably passing through the protrusion 71 and the stage 7. A clamping bolt 62 is connected to the first threaded hole to clamp the clip 61 against the stage 7. The diameter of the head of the clamping bolt 62 is greater than the width of the clip 61. A disc-shaped target is placed on the stage 7 so that the two are coaxial. Then, the two sides of the groove 612 are in contact with the outer circumference of the target, and the two clips 61 are symmetrical about the axis of the target. The clamping bolt 62 is then tightened to secure the target.

[0016] Furthermore, the protrusion 71 is in the shape of a rectangular parallelepiped and the symmetry plane of the rectangular parallelepiped passes through the axis of the stage 7. The guide groove 611 is slidably connected to the protrusion 71 so that the symmetry planes of the two clips 61 pass through the axis of the stage 7. When fixing the target, only the clip 61 needs to be moved back and forth without adjusting its angle. The clamp 6 can fix disc-shaped targets of multiple specifications. When testing multiple targets of the same specification, after testing the first one, it is only necessary to loosen a clamping bolt 62 and move a clip 61 to remove the target. When testing the second target, one side of the target is brought into contact with the unmoved clip 61 for positioning. Then, the previously moved clip 61 is brought into contact with the target and the clamping bolt 62 is tightened to fix the second target.

[0017] Specifically, a through slot 31 is provided on the column 3, and a screw 32 is also rotatably connected to the column 3. One end of the cantilever 4 is slidingly connected to the through slot 31. A second threaded hole is provided on the cantilever 4, and the screw 32 is threadedly connected to the second threaded hole. By rotating the screw 32, the height of the cantilever 4 can be adjusted.

[0018] Furthermore, the movable seat 8 is provided with a third threaded hole extending therethrough, to which a positioning bolt is connected. An inverted T-slot can be provided on the base 1, and the movable seat 8 is slidably connected to the T-slot. Tightening the positioning bolt can fix the position of the movable seat 8.

[0019] During the test, the disc-shaped target is first placed on the stage 7 so that the two are coaxial. Then, the two sides of the groove 612 on a clip 61 are in contact with the outer circumference of the target and the clip 61 is fixed. Then, the movable seat 8 is moved so that the target is located below the Hall probe 5 and the Hall probe 5 is more than 25 mm away from the edge of the target in the horizontal direction (the Hall probe 5 is located within the range of the target rather than outside). Then, the Hall probe 5 is lowered so that its lower surface is 1.5 mm away from the upper surface of the target. Then, the target is removed and the reading of the Gauss magnetometer at this time is recorded. This reading is the reference value. Consider the magnetic field strength H0. Keeping the position of the Hall probe 5 unchanged, place the target on the stage 7 so that the two are coaxial. Then, fix the target with the clamp 6. Then record the Gaussian magnetometer reading H1 at this time. This reading is the measured magnetic field strength. Then, rotate the stage 7 at equal angles for no less than five times (the total angle of rotation of the stage 7 is less than 360°). Record the Gaussian magnetometer reading after each rotation as H2, H3, ...Hi. The magnetic permeability Pi of the i-th point = Hi / H0*100%. The maximum, minimum, and average values ​​of the magnetic permeability can be obtained by calculation. The present application rotates the target by rotating the stage 7, which makes it easier.

[0020] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A device for testing the magnetic permeability of a magnetic target material, comprising a base (1), a column (3) being provided on one side of the base (1), and characterized in that: The column (3) is provided with a cantilever (4) that can move up and down, and the cantilever (4) is provided with a Hall probe (5), and a magnetic source (2) is provided directly below the Hall probe (5), and the magnetic source (2) is fixed on the base (1), and the base (1) is also slidably connected to a movable seat (8), and a vertical shaft (81) is provided on the movable seat (8), and the top end of the vertical shaft (81) is rotatably connected to a stage (7), the bottom surface of the stage (7) is higher than the top surface of the magnetic source (2), and the top surface of the stage (7) is lower than the bottom surface of the Hall probe (5), and a clamp (6) for fixing the target material is provided on the stage (7).

2. A magnetic target material permeability testing device according to claim 1, characterized in that: Bumps (71) are provided on both sides of the top surface of the worktable (7), and the two bumps (71) are symmetrical about the axis of the worktable (7). The clamp (6) includes a clip (61), and a guide groove (611) is provided on the clip (61). A groove (612) is provided on one side of the clip (61), and the cross-section of the groove (612) is an isosceles triangle. The thickness of the clip (61) is greater than the height of the bump (71). A first threaded hole is provided on the bump (71), and a clamping bolt (62) is connected to the first threaded hole so as to press the clip (61) onto the worktable (7).

3. The magnetic target material permeability testing device according to claim 2, characterized in that: The protrusion (71) is in the shape of a cuboid, and the symmetry plane of the cuboid passes through the axis of the stage (7), and the guide groove (611) is slidably connected to the protrusion (71).

4. The device for testing the magnetic permeability of a magnetic target material according to claim 1, wherein: The column (3) is provided with a through slot (31), and the column (3) is also rotatably connected to a screw rod (32). One end of the cantilever (4) is slidably connected to the through slot (31), and the cantilever (4) is provided with a second threaded hole passing therethrough, and the screw rod (32) is threadedly connected to the second threaded hole.

5. A magnetic target material permeability testing device according to any one of claims 1 to 4, characterized in that: The movable seat (8) is provided with a third threaded hole extending therethrough, and the third threaded hole is connected with a positioning bolt.

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