Active degaussing coil suitable for cubic magnetic shielding device and cubic magnetic shielding device

Abstract

The utility model provides an active degaussing coil suitable for a cubic magnetic shielding device and the cubic magnetic shielding device, a plurality of degaussing wiring holes of the active degaussing coil are distributed on each side surface, a first winding assembly, a second winding assembly and a third winding assembly are connected in series to form a communication cable, and the communication cable is configured to be externally connected with power supply equipment. The part, penetrating into the cubic magnetic shielding device through the degaussing wiring hole, of the communication cable forms internal wiring on the inner surface of the cubic magnetic shielding device, and the part, penetrating out of the cubic magnetic shielding device through the degaussing wiring hole, of the communication cable forms external wiring on the outer surface of the cubic magnetic shielding device. Each of the front winding, the left winding, the rear winding, the right winding, the upper winding and the lower winding is composed of an internal wire and an external wire on the side face where the winding is located. According to the scheme, the parallel distributed coil and the bevel edge type coil are combined, the installation complexity can be reduced, better magnetic circuit distribution can be obtained, and the purpose of improving the demagnetization effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to demagnetization technical field especially relates to a kind of active demagnetization coil and cubic magnetic shielding device suitable for cubic magnetic shielding device. BACKGROUND

[0002] In biomedical research, zero magnetic science, magnetic shielding technology research and other fields, high-performance magnetic shielding device has been widely applied.Magnetic shielding device uses high magnetic permeability soft magnetic material, through magnetic circuit shunt and eddy current effect shielding external interference magnetic field, provides weak magnetic environment for heart brain magnetic imaging measurement.However, its shielding efficiency is susceptible to external magnetic field fluctuation interference, for example, residual stress and strain of shielding device in processing process, and the internal magnetic field uniformity of magnetic shielding device is reduced, magnetic circuit continuity is poor and other problems caused in transportation, installation and disassembly process, in turn, cause measurement precision to drop significantly.

[0003] To solve this problem, prior art installs demagnetization coil in magnetic shielding device, and generates closed magnetic field by inputting AC oscillation current with gradually decreasing amplitude, to realize demagnetization and improve the magnetic field uniformity in magnetic shielding device.However, commonly used I-type demagnetization coil and L-type demagnetization coil have the problem of low magnetic field uniformity, and the installation and debugging process of distributed coil is complex, which increases construction difficulty and cost.

[0004] Therefore, how to improve the magnetic field uniformity on the basis of ensuring the convenience of installation and debugging of distributed coil has become one of the main technical problems in magnetic shielding device research. UTILITY MODEL CONTENT

[0005] The utility model embodiment provides a kind of active demagnetization coil and cubic magnetic shielding device suitable for cubic magnetic shielding device, to solve the technical problems that existing demagnetization coil in related art is difficult to consider installation and debugging convenience and magnetic field uniformity requirement.

[0006] The utility model discloses an active degaussing coil suitable for cubic magnetic shielding device, including: first winding assembly, including front side winding and left side winding, the front side winding and left side winding are respectively wound in the front side of cubic magnetic shielding device and left side, parallel to the upper side of cubic magnetic shielding device, second winding assembly, including rear side winding and right side winding, the rear side winding and right side winding are respectively wound in the rear side of cubic magnetic shielding device and right side, parallel to the upper side of cubic magnetic shielding device, third winding assembly, including upper side winding and lower side winding, the upper side winding and lower side winding are respectively wound in the upper side of cubic magnetic shielding device and lower side, respectively along the diagonal of upper side and the diagonal of lower side arrangement, a plurality of degaussing wiring hole, distribution in the front side, left side, rear side, right side, upper side and lower side, first winding assembly, second winding assembly and third winding assembly are connected into intercommunication cable in series, the intercommunication cable is configured as external power supply equipment, and, the part of intercommunication cable that passes through degaussing wiring hole enters the cubic magnetic shielding device forms internal wiring on the inner surface of cubic magnetic shielding device, the part of intercommunication cable that passes through degaussing wiring hole and comes out of cubic magnetic shielding device forms external wiring on the outer surface of cubic magnetic shielding device, and each winding in the front side winding, left side winding, rear side winding, right side winding, upper side winding and lower side winding is composed of internal wiring and external wiring of the side of winding.

[0007] In an embodiment of the utility model, optionally, the number of first winding assembly is one or more, the number of second winding assembly is same with the number of first winding assembly, each first winding assembly is arranged opposite to corresponding second winding assembly.

[0008] In an embodiment of the utility model, optionally, the current direction in internal wiring and external wiring of each side is opposite, the internal wiring current direction of each group of opposite faces of cubic magnetic shielding device is same, and the external wiring current direction of each group of opposite faces of cubic magnetic shielding device is same, the magnetic field direction formed by upper side and lower side is opposite, the magnetic field direction formed by left side and right side is opposite, and the magnetic field direction formed by front side and rear side is opposite.

[0009] In an embodiment of the utility model, optionally, the demagnetization wire hole includes: first hole and second hole at opposite ends of the upper side, third hole, seventh hole, eleventh hole at the side edge of the front side, near the right side, fourth hole, eighth hole, twelfth hole at the side edge of the right side, near the front side, fifth hole, ninth hole, thirteenth hole at the side edge of the left side, near the back side, sixth hole, tenth hole, fourteenth hole at the side edge of the back side, near the left side, fifteenth hole and sixteenth hole at opposite ends of the lower side.

[0010] In an embodiment of the utility model, optionally, the third hole and the fourth hole are closely arranged, the fifth hole and the sixth hole are closely arranged, and the third hole and the fourth hole, the fifth hole and the sixth hole are located at a first height below the upper side, the seventh hole and the eighth hole are closely arranged, the ninth hole and the tenth hole are closely arranged, and the seventh hole and the eighth hole, the ninth hole and the tenth hole are located at a second height below the first height, the eleventh hole and the twelfth hole are closely arranged, the thirteenth hole and the fourteenth hole are closely arranged, and the eleventh hole and the twelfth hole, the thirteenth hole and the fourteenth hole are located at a third height below the second height and higher than the height of the lower side where the fifteenth hole and the sixteenth hole are located, and the vertical distance between the first height and the second height is equal to the vertical distance between the second height and the third height.

[0011] In an embodiment of the utility model, optionally, the communication cable is from the input end of the active demagnetization coil outside the first hole as the starting position, penetrates into the second hole along the diagonal of the outer surface of the upper side, continues to extend to the inside of the first hole along the diagonal of the inner surface of the upper side, and then connects the first transition wire extending downward, to complete the winding of the upper side winding.

[0012] In an embodiment of the utility model, optionally, the communication cable extends downwards to the third hole of the front side through the first transition wire, after passing out of the front side from the third hole, extends over the outer surface of the back side along the outer surface of the right side, passes into the fifth hole of the left side, extends over the inner surface of the right side along the inner surface of the back side, passes out from the fourth hole, then extends over the outer surface of the left side along the outer surface of the front side, passes into the sixth hole, extends over the inner surface of the front side along the inner surface of the left side, then extends the second transition wire connected in series downwards along the inner surface of the front side, passes out from the seventh hole through the second transition wire, extends over the outer surface of the back side along the outer surface of the right side, passes into the ninth hole of the left side, extends over the inner surface of the right side along the inner surface of the back side, passes out from the eighth hole, then extends over the outer surface of the left side along the outer surface of the front side, passes into the tenth hole, extends over the inner surface of the front side along the inner surface of the left side, then extends the third transition wire connected in series downwards along the inner surface of the front side, passes out from the eleventh hole through the third transition wire, extends over the outer surface of the back side along the outer surface of the right side, passes into the thirteenth hole of the left side, extends over the inner surface of the right side along the inner surface of the back side, passes out from the twelfth hole, then extends over the outer surface of the left side along the outer surface of the front side, passes into the fourteenth hole, extends over the inner surface of the front side along the inner surface of the left side, then extends the fourth transition wire connected in series downwards along the inner surface of the front side, passes out from the fifteenth hole through the fourth transition wire, completes the winding of the front side winding, the left side winding, the back side winding and the right side winding.

[0013] In an embodiment of the utility model, optionally, after the communication cable passes out from the fifteenth hole, extends to the sixteenth hole opposite to the fifteenth hole along the diagonal line of the outer surface of the lower side, after passing into the sixteenth hole, returns to the fifteenth hole along the diagonal line of the inner surface of the lower side, connects the fifth transition wire from the fifteenth hole, and completes the winding of the lower side winding.

[0014] In an embodiment of the utility model, optionally, the fifth transition wire extends upwards to the first hole, and the first hole of the cubic magnetic shielding device is connected to the output end of the active degaussing coil after passing out.

[0015] In an embodiment of the utility model, optionally, the size ratio of the cubic magnetic shielding device is 1:1:1.

[0016] In an embodiment of the utility model, optionally, each side of the cubic magnetic shielding device is a regular rectangular high-permeability soft magnetic material.

[0017] In a second aspect, the utility model provides a cuboid magnetic shielding device, its characterized in be suitable for cuboid magnetic shielding device's active degaussing coil that any one of above-mentioned first aspect includes.

[0018] The above technical scheme, aiming at the technical problem that the existing degaussing coil in the related art is difficult to consider installation and debugging convenience and magnetic field uniformity requirement, combines the double advantage layout of the degaussing coil distribution of the cuboid magnetic shielding device of parallel distributed coil and bevel coil, on the one hand, inherits the significant characteristics of high magnetic field uniformity and dense distribution of parallel distributed coil, so that the magnetic field is stable and evenly covers the target area during the degaussing process. On the other hand, the winding process is simple, convenient to install, which helps to reduce the labor and time cost. This layout mode guarantees the continuity of the magnetic circuit, can avoid the interruption or disorder of the magnetic circuit, and further optimizes the magnetic field distribution, so that the entire degaussing coil can form a stable and efficient degaussing magnetic field during operation. While reducing the installation complexity, it can still meet the extremely high degaussing efficiency requirement, and provides a more reliable and practical solution for degaussing application in the related field. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the utility model embodiment, the drawings needed in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0020] Figure 1 The main structure of the active degaussing coil suitable for the cuboid magnetic shielding device of an embodiment of the utility model is shown;

[0021] Figure 2 The structure schematic diagram of the left side, the right side, the front side and the rear side of the active degaussing coil suitable for the cuboid magnetic shielding device of an embodiment of the utility model is shown;

[0022] Figure 3 The position structure schematic diagram of the degaussing wire hole of the active degaussing coil suitable for the cuboid magnetic shielding device of an embodiment of the utility model is shown;

[0023] Figure 4 The wire winding partial schematic diagram of the degaussing wire hole of the active degaussing coil suitable for the cuboid magnetic shielding device of an embodiment of the utility model is shown;

[0024] Figure 5 The degaussing coil winding mode schematic diagram of the active degaussing coil suitable for the cuboid magnetic shielding device of an embodiment of the utility model is shown;

[0025] Figure 6 The magnetic field simulation result diagram of the finite element calculation of the active degaussing coil suitable for the cubic magnetic shielding device is shown in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] As Figure 1 shown, the utility model discloses an active degaussing coil 1 suitable for cubic magnetic shielding device, include: first winding assembly, second winding assembly, third winding assembly and multiple degaussing wiring hole.

[0028] Among them, the first winding assembly includes the front side winding and the left side winding, and the front side winding and the left side winding are respectively wound on the front side and the left side of the cubic magnetic shielding device, and are parallel to the upper side of the cubic magnetic shielding device. Figure 2 As shown, the front side winding and the left side winding include: the wiring 8, 12 and 16 located on the outer surface of the front side and the left side, and the wiring 9, 13 and 17 located on the inner surface of the front side and the left side.

[0029] The second winding assembly includes the rear side winding and the right side winding, and the rear side winding and the right side winding are respectively wound on the rear side and the right side of the cubic magnetic shielding device, and are parallel to the upper side of the cubic magnetic shielding device. Figure 2 As shown, the rear side winding and the right side winding: the wiring 7, 11 and 15 located on the outer surface of the rear side and the right side, and the wiring 6, 10 and 14 located on the inner surface of the front side and the left side.

[0030] In a possible design, the number of the first winding assembly is one or more; the number of the second winding assembly is the same as that of the first winding assembly; each first winding assembly is oppositely arranged with a corresponding second winding assembly. Optionally, Figure 1 and Figure 2 As shown, the number of the first winding assembly and the number of the second winding assembly are both three groups.

[0031] The third winding assembly includes the upper side winding and the lower side winding, and the upper side winding and the lower side winding are respectively wound on the upper side and the lower side of the cubic magnetic shielding device, and are respectively arranged along the diagonal of the upper side and the diagonal of the lower side. As Figure 1As shown, the upper side winding includes the wire 2 on the inner surface of the upper side and the wire 3 on the outer surface of the upper side, and the lower side winding includes the wire 4 on the inner surface of the lower side and the wire 5 on the outer surface of the lower side.

[0032] Further, the plurality of demagnetization wire holes are distributed on the front side, the left side, the back side, the right side, the upper side and the lower side, the first winding assembly, the second winding assembly and the third winding assembly are connected in series to form a communication cable, the communication cable is configured to externally connect a power supply device, and the part of the communication cable that penetrates into the cubic magnetic shielding device through the demagnetization wire hole forms an internal wire on the inner surface of the cubic magnetic shielding device, and the part of the communication cable that penetrates out of the cubic magnetic shielding device through the demagnetization wire hole forms an external wire on the outer surface of the cubic magnetic shielding device, and each of the front side winding, the left side winding, the back side winding, the right side winding, the upper side winding and the lower side winding is composed of the internal wire and the external wire on the side where the winding is located.

[0033] It should be understood that the current directions in the internal wire and the external wire of each side are opposite; the current directions of the internal wires of each pair of opposite sides of the cubic magnetic shielding device are consistent, and the current directions of the external wires of each pair of opposite sides of the cubic magnetic shielding device are consistent; the magnetic field directions formed by the upper side and the lower side are opposite; the magnetic field directions formed by the left side and the right side are opposite; the magnetic field directions formed by the front side and the back side are opposite. In this way, the magnetic circuits formed by the various windings are uniform, continuous and dense, which effectively improves the demagnetization efficiency of the cubic magnetic shielding device.

[0034] The specific design of the demagnetization wire hole is as shown in Figure 3 As shown, the demagnetization wire hole includes: a first hole 18 and a second hole 19 located at the two ends of the diagonal line of the upper side; a third hole 20, a seventh hole 24 and an eleventh hole 28 located at the side edge of the front side and adjacent to the right side; a fourth hole 22, an eighth hole 26 and a twelfth hole 30 located at the side edge of the right side and adjacent to the front side; a fifth hole 21, a ninth hole 25 and a thirteenth hole 29 located at the side edge of the left side and adjacent to the back side; a sixth hole 23, a tenth hole 27 and a fourteenth hole 31 located at the side edge of the back side and adjacent to the left side; a fifteenth hole 32 and a sixteenth hole 33 located at the two ends of the diagonal line of the lower side.

[0035] In an embodiment of the utility model, optionally, the third hole 20 and the fourth hole 22 are arranged adjacently, the fifth hole 21 and the sixth hole 23 are arranged adjacently, and the third hole 20 and the fourth hole 22, the fifth hole 21 and the sixth hole 23 are located at a first height below the upper side; the seventh hole 24 and the eighth hole 26 are arranged adjacently, the ninth hole 25 and the tenth hole 27 are arranged adjacently, and the seventh hole 24 and the eighth hole 26, the ninth hole 25 and the tenth hole 27 are located at a second height below the first height; the eleventh hole 28 and the twelfth hole 30 are arranged adjacently, the thirteenth hole 29 and the fourteenth hole 31 are arranged adjacently, and the eleventh hole 28 and the twelfth hole 30, the thirteenth hole 29 and the fourteenth hole 31 are located at a third height below the second height and higher than the height of the lower side where the fifteenth hole 32 and the sixteenth hole 33 are located; wherein the vertical distance between the first height and the second height is equal to the vertical distance between the second height and the third height.

[0036] In combination Figure 3 and Figure 5 As shown in the utility model, in an embodiment of the utility model, optionally, the input end 40 of the communication cable from the active degaussing coil 1 located outside the first hole 18 is the starting position, penetrates into the second hole 19 along the diagonal line of the outer surface of the upper side, continues to extend to the inner side of the first hole 18 along the diagonal line of the inner surface of the upper side, and then connects the first transition wire 35 extending downward, to complete the winding of the upper side winding.

[0037] Further, the winding mode of the communication cable in each hole is as shown in Figure 4As shown, on the basis of this winding mode, the communication cable extends downward to the third hole 20 of the front side through the first transition wire 35, extends over the outer surface of the right side after passing out of the third hole 20 of the front side, extends over the outer surface of the rear side along the outer surface of the right side, passes into the fifth hole 21 of the left side, extends over the inner surface of the right side along the inner surface of the rear side, passes out of the fourth hole 22, extends over the outer surface of the left side along the outer surface of the front side, passes into the sixth hole 23, extends over the inner surface of the left side along the inner surface of the front side, extends downward along the inner surface of the front side in series with the second transition wire 36, passes out of the seventh hole 24 through the second transition wire 36, extends over the outer surface of the right side along the outer surface of the rear side, passes into the ninth hole 25 of the left side, extends over the inner surface of the right side along the inner surface of the rear side, passes out of the eighth hole 26, extends over the outer surface of the left side along the outer surface of the front side, passes into the tenth hole 27, extends over the inner surface of the left side along the inner surface of the front side, extends downward along the inner surface of the front side in series with the third transition wire 37, passes out of the eleventh hole 28 through the third transition wire 37, extends over the outer surface of the right side along the outer surface of the rear side, passes into the thirteenth hole 29 of the left side, extends over the inner surface of the right side along the inner surface of the rear side, passes out of the twelfth hole 30, extends over the outer surface of the left side along the outer surface of the front side, passes into the fourteenth hole 31, extends over the inner surface of the left side along the inner surface of the front side, extends downward along the inner surface of the front side in series with the fourth transition wire 38, passes out of the fifteenth hole 32 through the fourth transition wire 38, and the winding of the front side winding, the left side winding, the rear side winding and the right side winding is completed.

[0038] In an embodiment of the utility model, optionally, after the communication cable passes out of the fifteenth hole 32, it extends to the sixteenth hole 33 opposite to the fifteenth hole 32 along the diagonal line of the outer surface of the lower side, returns to the fifteenth hole 32 along the diagonal line of the inner surface of the lower side after passing into the sixteenth hole 33, and the fifth transition wire 39 is connected in series at the fifteenth hole 32, and the winding of the lower side winding is completed.

[0039] In an embodiment of the utility model, optionally, the fifth transition wire 39 extends upward to the first hole 18, passes out of the first hole 18 and is connected to the output end 34 of the driving demagnetization coil 1 through the cubic magnetic shielding device. Figure 6 As shown, the magnetic field simulation result is formed by supplying power to the input end 40 and the output end 34 through an external power supply.

[0040] In conclusion, the technical scheme provided by the utility model combines the double advantages of parallel distributed coil and bevel coil. On the one hand, the parallel distributed coil inherits the significant characteristics of high magnetic field uniformity and dense distribution, so that the magnetic field stably and uniformly covers the target area during the degaussing process. On the other hand, the winding process is simple and convenient to install, which helps to reduce the labor and time cost. This layout ensures the continuity of the magnetic circuit, avoids the interruption or disorder of the magnetic circuit, further optimizes the magnetic field distribution, so that the entire degaussing coil can form a stable and efficient degaussing magnetic field during operation, while reducing the installation complexity, it still meets the extremely high degaussing efficiency requirement, and provides a more reliable and practical solution for the degaussing application in the related field.

[0041] Further, the utility model also provides a cubic magnetic shielding device, the cubic magnetic shielding device includes the active degaussing coil suitable for the cubic magnetic shielding device in the foregoing, therefore, has all the technical effects described above, and will not be repeated here.

[0042] In a possible design, the size ratio of the cubic magnetic shielding device is 1:1:1, and the cubic magnetic shielding device of the square body can obtain more uniform and dense magnetic field distribution after uniformly winding the coil in the above-mentioned manner, thereby improving the degaussing capacity and obtaining better degaussing effect.

[0043] In addition, each side surface of the cubic magnetic shielding device is a regular rectangular high-permeability soft magnetic material. The high-permeability soft magnetic material refers to a kind of magnetic material with high magnetic permeability, low coercivity and low hysteresis loss, which has good temperature stability and magnetic saturation characteristics, is easy to process and form, has low process cost and high magnetic permeability, and using the high-permeability soft magnetic material can improve the degaussing capacity of the cubic magnetic shielding device of the utility model and obtain better degaussing effect.

[0044] The above-described embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model, and all should be included in the protection scope of the utility model.

Claims

1. An active degaussing coil suitable for use in a cubic magnetic shield, characterized in that, Comprise: A first winding assembly comprising a front side winding and a left side winding, the front side winding and the left side winding being respectively wound around a front side and a left side of the cubic magnetic shielding device, parallel to an upper side of the cubic magnetic shielding device; A second winding assembly comprising a back side winding and a right side winding, the back side winding and the right side winding being respectively wound around a back side and a right side of the cubic magnetic shielding device, parallel to the upper side of the cubic magnetic shielding device; A third winding assembly comprising an upper side winding and a lower side winding, the upper side winding and the lower side winding being respectively wound around an upper side and a lower side of the cubic magnetic shielding device, respectively along a diagonal of the upper side and a diagonal of the lower side; A plurality of demagnetization wiring holes distributed on the front side, the left side, the back side, the right side, the upper side and the lower side, the first winding assembly, the second winding assembly and the third winding assembly being connected in series to form a communication cable, the communication cable being configured to externally connect a power supply device, and Parts of the communication cable penetrating into the cubic magnetic shielding device through the demagnetization wiring holes form internal wiring on the inner surface of the cubic magnetic shielding device, and parts of the communication cable penetrating out of the cubic magnetic shielding device through the demagnetization wiring holes form external wiring on the outer surface of the cubic magnetic shielding device, each of the front side winding, the left side winding, the back side winding, the right side winding, the upper side winding and the lower side winding being composed of internal wiring and external wiring of the side where the winding is located.

2. The active demagnetization coil suitable for a cubic magnetic shielding device according to claim 1, wherein The number of the first winding assembly is one or more; The number of the second winding assembly is the same as the number of the first winding assembly; Each of the first winding assembly and the corresponding second winding assembly is oppositely arranged.

3. The active demagnetization coil suitable for a cubic magnetic shielding device according to claim 2, wherein The current direction of the internal wiring and the external wiring of each side is opposite; The internal wiring current direction of each pair of opposite sides of the cubic magnetic shielding device is consistent, and The external wiring current direction of each pair of opposite sides of the cubic magnetic shielding device is consistent; The magnetic field direction formed by the upper side and the lower side is opposite; The magnetic field direction formed by the left side and the right side is opposite; The magnetic field direction formed by the front side and the back side is opposite.

4. Active degaussing coil suitable for a cubic magnetic shielding device according to any one of claims 1 to 3, characterized in that, The demagnetization wiring holes comprise: First and second holes located at both ends of the diagonal of the upper side; Third, seventh, eleventh holes located at the side edge of the front side, adjacent to the right side; Fourth, eighth, twelfth holes located at the side edge of the right side, adjacent to the front side; Fifth, ninth, thirteenth holes located at the side edge of the left side, adjacent to the back side; Sixth, tenth, fourteenth holes located at the side edge of the back side, adjacent to the left side; Fifteenth and sixteenth holes located at both ends of the diagonal of the lower side; The third hole and the fourth hole are arranged adjacently, the fifth hole and the sixth hole are arranged adjacently, and the third hole and the fourth hole and the fifth hole and the sixth hole are located at a first height below the upper side; The seventh hole and the eighth hole are arranged adjacently, the ninth hole and the tenth hole are arranged adjacently, and the seventh hole and the eighth hole and the ninth hole and the tenth hole are located at a second height below the first height; The eleventh hole and the twelfth hole are arranged adjacently, the thirteenth hole and the fourteenth hole are arranged adjacently, and the eleventh hole and the twelfth hole and the thirteenth hole and the fourteenth hole are located at a third height below the second height and higher than the height of the lower side where the fifteenth hole and the sixteenth hole are located; The vertical distance between the first height and the second height is equal to the vertical distance between the second height and the third height.

5. The active degaussing coil suitable for a cubic magnetic shielding device according to claim 4, wherein, The communication cable has a starting position at an input end of the active degaussing coil located outside the first hole, penetrates into the second hole along a diagonal line of the outer surface of the upper side, continues to extend along a diagonal line of the inner surface of the upper side to the inside of the first hole, and then connects a first transition wire extending downward to complete the winding of the upper side winding. The communication cable extends downward through the third hole of the front side via the first transition wire, extends through the outer surface of the back side along the outer surface of the right side after passing out of the third hole of the front side, extends through the inner surface of the right side along the inner surface of the back side after passing into the fifth hole of the left side, extends through the inner surface of the front side along the inner surface of the left side after passing out of the fourth hole, extends through the outer surface of the left side along the outer surface of the front side after passing into the sixth hole, extends through the inner surface of the front side along the inner surface of the left side after passing out of the seventh hole via the second transition wire, extends through the outer surface of the back side along the outer surface of the right side after passing into the ninth hole of the left side, extends through the inner surface of the right side along the inner surface of the back side after passing out of the eighth hole, extends through the outer surface of the left side along the outer surface of the front side after passing into the tenth hole, extends through the inner surface of the front side along the inner surface of the left side after passing out of the eleventh hole via the third transition wire, extends through the outer surface of the back side along the outer surface of the right side after passing into the thirteenth hole of the left side, extends through the inner surface of the right side along the inner surface of the back side after passing out of the twelfth hole, extends through the outer surface of the left side along the outer surface of the front side after passing into the fourteenth hole, extends through the inner surface of the front side along the inner surface of the left side after passing out of the fifteenth hole via the fourth transition wire, and completes the winding of the front side winding, the left side winding, the back side winding, and the right side winding; The communication cable extends diagonally along the outer surface of the bottom side to the sixteenth hole opposite to the fifteenth hole after passing out of the fifteenth hole, returns to the fifteenth hole along the diagonal of the inner surface of the bottom side after passing into the sixteenth hole, and completes the winding of the bottom side winding after passing into the fifth transition wire at the fifteenth hole; The fifth transition wire extends upward to the first hole, and is connected to the output end of the active degaussing coil after passing out of the first hole of the cubic magnetic shielding device.

6. Active degaussing coil suitable for a cubic magnetic shielding device according to claim 5, characterized in that, The cubic magnetic shielding device has a size ratio of 1:1:

1.

7. The active degaussing coil suitable for a cubic magnetic shield according to claim 5, characterized in that, Each side of the cubic magnetic shielding device is a regular rectangular high-permeability soft magnetic material.

8. A cubic magnetic shielding device, characterized by An active degaussing coil for a cubic magnetic shielding device according to any one of claims 1 to 7 is provided.

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