A degaussing coil structure suitable for hexahedral magnetic shielding device

Abstract

A demagnetization coil structure suitable for a hexahedral magnetic shielding device includes a demagnetization coil and a hexahedral shielding body formed by splicing six plates, wherein the inner and outer sides of each face of the shielding body are provided with demagnetization coils arranged in parallel along the diagonal, the demagnetization coils of two opposite faces are parallel to each other, the demagnetization coils of the six faces are arranged in series one by one, the current directions of the demagnetization coils on the inner and outer sides of each face are opposite, and the current directions of the demagnetization coils on the outer sides of the two opposite faces are opposite. The above scheme can ensure that the magnetic field generated by the demagnetization coil after being energized is evenly distributed inside the shielding body, and further solves the problem of unsatisfactory shielding performance caused by the large number of threading holes and redundant lead interference in the prior art of the magnetic shielding device, and can also simplify the wiring method of the demagnetization coil, reduce the complexity of the overall structure of the magnetic shielding device, and is conducive to accelerating the development progress and promotion and application of the magnetic shielding device.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic material demagnetization, and in particular to a demagnetization coil structure suitable for a hexahedral magnetic shielding device. Background Art

[0002] With the rapid development of science and technology, the application demand for "extremely weak magnetic" or "zero magnetic" environment in the fields of national defense aviation, cutting-edge science, life science, basic physics research and medical research is becoming more and more extensive and urgent. According to different application requirements, the "extremely weak magnetic" or "zero magnetic" environment is usually provided by building magnetic shielding devices of different sizes and shapes with magnetic materials with higher magnetic permeability. Common magnetic shielding devices consist of cylindrical structures and hexahedral segment structures. Among them, the hexahedral structure is easy to splice and can be built into magnetic shielding devices of different sizes, which are widely used. Shielding effectiveness is a key indicator to measure the performance of magnetic shielding devices. However, since the performance of high magnetic permeability magnetic materials is sensitive to the external environment, such as stress, temperature, vibration, etc., the construction and use of zero magnetic devices will inevitably cause serious irreversible magnetization of high magnetic permeability materials, which seriously affects their shielding effectiveness. Therefore, the magnetic shielding device needs to be demagnetized after it is built and used for a period of time to ensure its shielding effectiveness.

[0003] The most critical part of demagnetizing a zero magnetic device is the design of the demagnetization coil structure. At present, common demagnetization coil structures include "I"-type and "L"-type structures distributed along the edges, circularly symmetrical distribution structures, and multiple groups of uniformly distributed structures along each face of the hexahedral zero magnetic device. Among them, the "I"-type and "L"-type demagnetization coil structures have the problem that the magnetic field generated is not uniformly distributed in the high magnetic permeability material, and the "I"-type structure has many threading holes, which is prone to serious magnetic leakage; the circularly symmetrical distribution structure has large threading holes, and also has serious magnetic leakage problems; although the magnetic field generated by the uniformly distributed demagnetization coil is relatively uniformly distributed in the high magnetic permeability material, the demagnetization coil has many threading holes, the wiring method is complicated, and more leads will inevitably be introduced in the process of connecting each coil, affecting the demagnetization effect. Summary of the invention

[0004] In view of the existing technical defects, the present invention provides a demagnetization coil structure suitable for a hexahedral magnetic shielding device, which aims to ensure that the magnetic field generated by the demagnetization coil after energization is uniformly distributed in the magnetic shielding material body, while reducing the number of demagnetization coil holes and redundant lead interference in the magnetic shielding device, and reducing the complexity of the demagnetization wire connection, thereby simplifying the overall structure of the magnetic shielding device and improving its engineering practicability.

[0005] To solve the above problems, the present invention provides a demagnetization coil structure suitable for a hexahedral magnetic shielding device, including a demagnetization coil and a hexahedral shielding body formed by splicing six plates, wherein the inner and outer sides of each face of the shielding body are provided with demagnetization coils arranged in parallel along the diagonal, the demagnetization coils on two opposite faces are parallel to each other, the demagnetization coils on the six faces are arranged in series one by one, the current directions of the demagnetization coils on the inner and outer sides of each face are opposite, and the current directions of the demagnetization coils on the outer sides of the two opposite faces are opposite.

[0006] The above scheme can ensure that the magnetic field generated by the degaussing coil after being energized is evenly distributed inside the shielding body, while further solving the problem of unsatisfactory shielding performance caused by the large number of wire holes in the magnetic shielding device and interference from redundant leads in the prior art. At the same time, it can also simplify the wiring method of the degaussing coil and reduce the complexity of the overall structure of the magnetic shielding device, which is conducive to accelerating the development progress and promotion and application of the magnetic shielding device.

[0007] Specifically, the upper part of the shielding body is vertex A, vertex B, vertex C and vertex D in the counterclockwise direction, and the lower part of the shielding body is vertex E, vertex F, vertex G and vertex H in the counterclockwise direction, and vertex A corresponds to vertex E, vertex B to vertex F, vertex C to vertex G, and vertex D to vertex H respectively. The series connection method of the demagnetization coil is: input from vertex G, from the outside of the shielding body to vertex B, from vertex B to the inside of the shielding body, then pass through vertex E and vertex G in sequence, from vertex G to the outside of the shielding body, then pass through vertex E and vertex B in sequence, from vertex B to the inside of the shielding body, then to vertex G, from vertex G to the outside of the shielding body, then pass through vertex H, vertex C to vertex A in sequence, from vertex A to the inside of the shielding body, then to vertex H, from vertex H to the outside of the shielding body, then to vertex A, from vertex A to the inside of the shielding body, then pass through vertex C and vertex H in sequence, and finally output from vertex H. After adopting this structure, the complexity of the degaussing coil can be simplified while ensuring the magnetic shielding effect of the degaussing coil on the shielding body, avoiding the interference of redundant leads, and facilitating the layout.

[0008] Preferably, two sections of degaussing coils parallel along the diagonal line on the outer side and the inner side of the same surface are a group, and the degaussing coils on each of the front side, rear side, left side and right side of the shielding body are two groups and are arranged crosswise so that the degaussing coils on these four surfaces are arranged in an X shape, and the number of degaussing coils on the upper side and the lower side of the shielding body is one group. The magnetic field generated by the degaussing coils arranged in an X shape can generate a stronger and more stable magnetic field inside the shielding body, further improving the magnetic shielding effect.

[0009] Specifically, the upper part of the shielding body is composed of vertices A, B, C and D in the counterclockwise direction, and the lower part of the shielding body is composed of vertices E, F, G and H in the counterclockwise direction, and vertex A corresponds to vertex E, vertex B corresponds to vertex F, vertex C corresponds to vertex G, and vertex D corresponds to vertex H. The series connection of the degaussing coil is as follows: input from vertex B, from the outside of the shielding body, through vertex G and vertex D in turn, from vertex D to the inside of the shielding body, then through vertex E and vertex B in turn, from vertex B to the outside of the shielding body, then to vertex D, from vertex D to the inside of the shielding body, then to vertex E and vertex B in turn, Point B, passes through vertex B to the outside of the shielding body and then passes through vertex E and vertex D in sequence, passes through vertex D to the inside of the shielding body and then passes through vertex G, vertex B and vertex F in sequence, passes through vertex F to the outside of the shielding body and then passes through vertex C and vertex H in sequence, passes through vertex H to the inside of the shielding body and then passes through vertex A and vertex F in sequence, passes through vertex F to the outside of the shielding body to vertex H, passes through vertex H to the inside of the shielding body and then reaches vertex F, passes through vertex F to the outside of the shielding body and then passes through vertex A and vertex H in sequence, passes through vertex H to the inside of the shielding body and then passes through vertex C and vertex F in sequence, and finally outputs from vertex F. After adopting this structure, while the degaussing coil achieves a better magnetic shielding effect, it avoids the interference of redundant leads and is convenient for layout.

[0010] Preferably, the shielding body is in the shape of a cuboid, so that the shape is more regular and meets most usage scenarios.

[0011] Preferably, a threading hole is provided at the vertex of the shielding body, the threading hole is triangular or circular, and the total number of the threading holes is at least 4.

[0012] Preferably, the shielding body is made of a material with high magnetic permeability, such as Permalloy material.

[0013] Preferably, the degaussing coil is made of pure copper wire, so that the wire resistance of the degaussing coil is small, which can reduce the demand for electromagnetic power for degaussing.

[0014] Preferably, the effective cross-section of the degaussing coil is 4 to 16 square millimeters, and the number of turns is 1 to 10 turns, thereby ensuring that the degaussing coil can generate a magnetic field with an intensity that meets the magnetic shielding requirements inside the shielding body after being energized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of a degaussing coil structure suitable for a hexahedral magnetic shielding device (the dashed line represents the perspective shielding body, the dotted line represents the degaussing coil located on the inner side of the shielding body, and the arrow represents the current flow of the degaussing coil after power is supplied to it);

[0016] Figure 2 It is a perspective view of another embodiment of a degaussing coil structure suitable for a hexahedral magnetic shielding device (the dashed line represents the perspective shielding body, the dotted line represents the degaussing coil located on the inner side of the shielding body, and the arrow represents the current flow of the degaussing coil after power is supplied to it).

[0017] Description of reference numerals:

[0018] 1. Shielding body; 2. Degaussing coil; 3. Threading hole. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should also be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] See also Figure 1 An embodiment of the present invention provides a demagnetization coil 2 structure suitable for a hexahedral magnetic shielding device, comprising a demagnetization coil 2 and a hexahedral shielding body 1 formed by splicing six plates, wherein the inner and outer sides of each face of the shielding body 1 are provided with demagnetization coils 2 arranged in parallel along the diagonal, the demagnetization coils 2 on two opposite faces are parallel to each other, the demagnetization coils 2 on the six faces are arranged in series one by one, the current directions of the demagnetization coils 2 on the inner and outer sides of each face are opposite, and the current directions of the demagnetization coils 2 on the outer sides of the two opposite faces are opposite.

[0021] The above scheme can ensure that the magnetic field generated by the degaussing coil 2 after being energized is evenly distributed inside the shielding body 1, and further solves the problem of unsatisfactory shielding performance caused by the large number of wire holes 3 of the magnetic shielding device and interference from redundant leads in the prior art. At the same time, it can also simplify the wiring method of the degaussing coil 2 and reduce the complexity of the overall structure of the magnetic shielding device, which is conducive to accelerating the development progress and promotion and application of the magnetic shielding device.

[0022] Specifically, the upper part of the shielding body 1 is vertex A, vertex B, vertex C and vertex D in the counterclockwise direction, and the lower part of the shielding body 1 is vertex E, vertex F, vertex G and vertex H in the counterclockwise direction, and vertex A corresponds to vertex E, vertex B corresponds to vertex F, vertex C corresponds to vertex G, and vertex D corresponds to vertex H. The series connection method of the degaussing coil 2 is: input from vertex G, from the outside of the shielding body 1 to vertex B, from vertex B penetrates into the inside of the shielding body 1 and then passes through vertex E and vertex G in sequence, from vertex G penetrates to the outside of the shielding body 1 and then passes through vertex E and vertex B in sequence, from vertex B penetrates into the inside of the shielding body 1 and then reaches vertex G, from vertex G penetrates to the outside of the shielding body 1 and then passes through vertex H, vertex C to vertex A in sequence, from vertex A penetrates into the inside of the shielding body 1 and then reaches vertex H, from vertex H penetrates to the outside of the shielding body 1 and then reaches vertex A, from vertex A penetrates into the inside of the shielding body 1 and then reaches vertex C and vertex H, and finally outputs from vertex H. After adopting this structure, the complexity of the degaussing coil 2 can be simplified while ensuring the magnetic shielding effect of the degaussing coil 2 on the shielding body 1, avoiding the interference of redundant leads, and facilitating the layout.

[0023] In the above scheme, the shielding body 1 is in the shape of a cuboid, so that the shape is more regular and meets most usage scenarios. Vertex A, vertex B, vertex C and vertex D are respectively located at the left rear, left front, right front and right rear positions of the upper part of the shielding body 1, and vertex E, vertex F, vertex G and vertex H are respectively located at the left rear, left front, right front and right rear positions of the lower part of the shielding body 1; after the degaussing coil 2 is energized, the current is input from the vertex G position along the direction of the degaussing coil 2, and passes through vertex B, vertex E, vertex G, vertex E, vertex B, vertex G, vertex H, vertex C, vertex A, vertex H, vertex A, vertex C, vertex H, and finally output from vertex H, thereby forming a magnetic field for magnetic shielding inside the shielding body 1.

[0024] It should be noted that the vertices A, B, C, D, E, F, G and H can be provided with threading holes 3 as required, and the threading holes 3 are preferably triangular or circular, which is more convenient for processing. The shielding body 1 is made of a high magnetic permeability material, which refers to a ferromagnetic material with a magnetic permeability of about 100 or more, such as a Permalloy material.

[0025] In this embodiment, the degaussing coil 2 is a pure copper wire, and the outside of the degaussing coil 2 is wrapped with an insulating layer to prevent the degaussing coil 2 from being short-circuited when it overlaps. The effective cross-section of the degaussing coil 2 is 4 to 16 square millimeters, and the number of turns is 1 to 10 turns, so as to ensure that the degaussing coil 2 can generate a magnetic field with a strength that meets the required magnetic shielding requirements inside the shielding body 1 after being energized.

[0026] like Figure 2As shown, in another embodiment, two sections of degaussing coils 2 parallel to the diagonal line on the outer side and the inner side of the same surface are grouped together, and the degaussing coils 2 on each of the front side, rear side, left side and right side of the shielding body 1 are grouped together and arranged crosswise so that the degaussing coils 2 on these four surfaces are arranged in an X shape, and the number of degaussing coils 2 on the upper side and the lower side of the shielding body 1 is grouped together. The magnetic field generated by the degaussing coils 2 arranged in an X shape can generate a stronger and more stable magnetic field inside the shielding body 1, further improving the magnetic shielding effect.

[0027] Specifically, the upper part of the shielding body 1 is vertex A, vertex B, vertex C and vertex D in the counterclockwise direction, and the lower part of the shielding body 1 is vertex E, vertex F, vertex G and vertex H in the counterclockwise direction, and vertex A corresponds to vertex E, vertex B corresponds to vertex F, vertex C corresponds to vertex G, and vertex D corresponds to vertex H. The series connection method of the degaussing coil 2 is: input from vertex B, from the outside of the shielding body 1 through vertex G and vertex D in sequence, from vertex D to the inside of the shielding body 1, then through vertex E and vertex B in sequence, from vertex B to the outside of the shielding body 1 and then to vertex D, from vertex D to the inside of the shielding body 1 and then to vertex B, After passing through the vertex B to the outside of the shielding body 1, it passes through the vertex E and the vertex D in sequence. After passing through the vertex D to the inside of the shielding body 1, it passes through the vertex G, the vertex B and the vertex F in sequence. After passing through the vertex F to the outside of the shielding body 1, it passes through the vertex C and the vertex H in sequence. After passing through the vertex H to the inside of the shielding body 1, it passes through the vertex A and the vertex F in sequence. After passing through the vertex F to the outside of the shielding body 1 to the vertex H, after passing through the vertex H to the inside of the shielding body 1 to the vertex F, after passing through the vertex F to the outside of the shielding body 1, it passes through the vertex A and the vertex H in sequence. After passing through the vertex H to the inside of the shielding body 1, it passes through the vertex C and the vertex F in sequence, and finally outputs from the vertex F. After adopting this structure, while the degaussing coil 2 achieves a better magnetic shielding effect, it avoids the interference of redundant leads and is convenient for arrangement. After the degaussing coil 2 is energized, the current is input from the vertex B along the direction of the degaussing coil 2, and passes through vertex G, vertex D, vertex E, vertex B, vertex D, vertex B, vertex E, vertex D, vertex G, vertex B, vertex F, vertex C, vertex H, vertex A, vertex F, vertex H, vertex F, vertex A, vertex H, vertex C, and finally output from vertex F to form a magnetic field for magnetic shielding in the shielding body 1.

[0028] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the invention.

Claims

1. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device, characterized in that: The invention comprises a demagnetizing coil (2) and a shielding body (1) formed by splicing six plates to form a hexahedron, wherein the inner side and the outer side of each face of the shielding body (1) are provided with a demagnetizing coil (2) arranged in parallel along a diagonal line, the demagnetizing coils (2) on two opposite faces are parallel to each other, the demagnetizing coils (2) on the six faces are arranged in series one by one, the current directions of the demagnetizing coils (2) on the inner side and the outer side of each face are opposite, and the current directions of the demagnetizing coils (2) on the outer sides of two opposite faces are opposite.

2. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to claim 1, characterized in that: Two sections of demagnetization coils (2) parallel to the diagonal line on the outer side and the inner side of the same surface form a group, and the demagnetization coils (2) on each of the front side, rear side, left side and right side of the shielding body (1) are two groups and are arranged crosswise so that the demagnetization coils (2) on these four surfaces are arranged in an X shape, and the number of demagnetization coils (2) on the upper side and the lower side of the shielding body (1) is one group.

3. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to claim 1, characterized in that: The upper part of the shielding body (1) is composed of vertices A, B, C and D in the counterclockwise direction, and the lower part of the shielding body (1) is composed of vertices E, F, G and H in the counterclockwise direction, and vertices A and E, vertices B and F, vertices C and G, and vertices D and H correspond to each other. The series connection of the demagnetizing coil (2) is as follows: input from vertex G, from the outside of the shielding body (1) to vertex B, from vertex B to the inside of the shielding body (1), and then sequentially through vertex E. and vertex G, passing through vertex G to the outside of the shielding body (1) and then passing through vertex E and vertex B in sequence, passing through vertex B to the inside of the shielding body (1) and then reaching vertex G, passing through vertex G to the outside of the shielding body (1) and then passing through vertex H and vertex C in sequence to vertex A, passing through vertex A to the inside of the shielding body (1) and then reaching vertex H, passing through vertex H to the outside of the shielding body (1) and then reaching vertex A, passing through vertex A to the inside of the shielding body (1) and then passing through vertex C and vertex H in sequence, and finally outputting from vertex H.

4. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to claim 2, characterized in that: The upper part of the shielding body (1) is composed of vertices A, B, C and D in the counterclockwise direction, and the lower part of the shielding body (1) is composed of vertices E, F, G and H in the counterclockwise direction, and vertices A and E, vertices B and F, vertices C and G, and vertices D and H correspond to each other. The series connection of the demagnetization coil (2) is as follows: input from vertex B, from the outside of the shielding body (1) through vertex G and vertex D in sequence, from vertex D into the inside of the shielding body (1) and then through vertex E and vertex B in sequence, from vertex B out to the outside of the shielding body (1) and then to vertex D, from vertex D into the inside of the shielding body (1) and then to vertex B, After passing through vertex B to the outside of the shielding body (1), it passes through vertex E and vertex D in sequence; after passing through vertex D to the inside of the shielding body (1), it passes through vertex G, vertex B and vertex F in sequence; after passing through vertex F to the outside of the shielding body (1), it passes through vertex C and vertex H in sequence; after passing through vertex H to the inside of the shielding body (1), it passes through vertex A and vertex F in sequence; after passing through vertex F to the outside of the shielding body (1) to vertex H; after passing through vertex H to the inside of the shielding body (1), it reaches vertex F; after passing through vertex F to the outside of the shielding body (1), it passes through vertex A and vertex H in sequence; after passing through vertex H to the inside of the shielding body (1), it passes through vertex C and vertex F in sequence, and finally outputs from vertex F.

5. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to any one of claims 1 to 4, characterized in that: The shielding body (1) is in the shape of a rectangular parallelepiped.

6. A degaussing coil structure suitable for a hexahedral magnetic shielding device according to claim 1 or 2, characterized in that: A threading hole (3) is provided at the vertex of the shielding body (1); the threading hole (3) is triangular or circular, and the total number of the threading holes (3) is at least 4.

7. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to any one of claims 1 to 4, wherein the six plates of the shielding body (1) are all made of a high magnetic permeability material.

8. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to any one of claims 1 to 4, characterized in that: The degaussing coil (2) is made of pure copper wire.

9. A degaussing coil (2) structure suitable for a hexahedral magnetic shielding device according to claim 8, characterized in that: The effective cross-section of the degaussing coil (2) is 4 to 16 square millimeters, and the number of turns is 1 to 10 turns.

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