Degaussing system for square magnetic shielding room

Abstract

The utility model provides a degaussing system for a square magnetic shielding chamber, which comprises a square magnetic shielding chamber, a degaussing device, a degaussing device and a degaussing device, the degaussing coils are distributed on the inner surface and the outer surface of the square magnetic shielding cabin body; comprising a first degaussing line set located on the front side face, a second degaussing line set located on the right side face, a third degaussing line set located on the lower side face, a fourth degaussing line set located on the rear side face, a fifth degaussing line set located on the left side face and a sixth degaussing line set located on the upper side face. The degaussing coils are connected in series according to the sequence of the first degaussing wire group, the second degaussing wire group, the third degaussing wire group, the fourth degaussing wire group, the fifth degaussing wire group and the sixth degaussing wire group. According to the utility model, the demagnetization effect of the magnetic shielding chamber can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a demagnetization system for square magnetic shield room. BACKGROUND

[0002] With the rapid development of science and technology, the equipment operation sensitivity in the fields of industry, engineering, measurement and medicine is continuously improved, and part of the equipment needs to work in the "extremely weak magnetic" or even "zero magnetic" environment. As an effective shielding means, the magnetic shield room can shield the electromagnetic interference source, and meet the demand of "extremely weak magnetic" or "zero magnetic" environment through reasonable design, so it is widely used and recognized in various fields. The basic principle is to shield the interference of high-frequency electromagnetic field through the eddy current effect of good conductor, and shield the geomagnetic field and low-frequency alternating magnetic field through the magnetic shunt effect of high magnetic permeability material (such as permalloy), so as to provide "zero magnetic" space for various experiments and researches. The initial magnetic permeability of high magnetic permeability material is a key factor to determine the shielding effectiveness of the magnetic shield room, and generally the higher the magnetic permeability, the better the shielding effect.

[0003] However, such material is easy to be magnetized by external stress, vibration and magnetic field, resulting in a large decrease in the initial magnetic permeability, and thus weakening the shielding effectiveness of the magnetic shield room. Therefore, a demagnetization system formed by a demagnetization coil must be provided to perform demagnetization treatment before formal work, so as to ensure that the magnetic shield room can shield the interference magnetic field efficiently and obtain a stable "zero magnetic" or "extremely weak magnetic" environment.

[0004] The demagnetization system mainly comprises a magnetic shield room, a demagnetization coil and a demagnetization machine and the like. Among them, the structural design of the demagnetization coil is one of the key links to determine the effect of the demagnetization system. The common demagnetization coil structures at present include edge distribution type, circumferential symmetry distribution type and diagonal line distribution type. Although the wiring mode of these structures is relatively simple, the uniformity of the magnetic field generated in the high magnetic permeability material is poor, especially in the magnetic shield room with a large length-width ratio, the edge and corner positions are easy to produce serious magnetic leakage phenomenon, thereby affecting the overall demagnetization effect of the magnetic shield room.

[0005] Therefore, how to avoid and reduce the magnetic leakage phenomenon at the edge and corner positions of the magnetic shield room to improve the overall demagnetization effect of the magnetic shield room becomes a technical problem to be solved at present. UTILITY MODEL CONTENTS

[0006] The utility model embodiment provides a demagnetization system for square magnetic shield room, aims at solving the technical problem of magnetic shield room edge and corner position magnetic leakage affecting the overall demagnetization effect of the magnetic shield room in the related art.

[0007] The utility model discloses an embodiment of the first aspect provides a degaussing system for square magnetic shield room, include: square magnetic shield room, by square magnetic shield cabin body constitutes, square magnetic shield cabin body includes front side, rear side, left side, right side, upper side and lower side, degaussing coil is distributed in the inner surface and the outer surface of square magnetic shield cabin body, including a plurality of degaussing line group, a plurality of degaussing line group includes: located first degaussing line group of front side, located second degaussing line group of right side, located third degaussing line group of lower side, located fourth degaussing line group of rear side, located fifth degaussing line group of left side, located sixth degaussing line group of upper side, wherein, degaussing coil is in the order of first degaussing line group, second degaussing line group, third degaussing line group, fourth degaussing line group, fifth degaussing line group and sixth degaussing line group series connection.

[0008] In an embodiment of the utility model, optionally, the degaussing line group on the adjacent face of the square magnetic shield cabin body is vertically distributed, the degaussing line group on the parallel face of the square magnetic shield cabin body is parallelly distributed and the number is same, the degaussing line group on any single face of the square magnetic shield cabin body is parallelly distributed with the edge of the single face at equal intervals, the degaussing system further includes threading hole, is oppositely distributed at the opposite edge of each face of the square magnetic shield cabin body, and the degaussing coil is wound on each face of the square magnetic shield cabin body through the threading hole.

[0009] In an embodiment of the utility model, optionally, the single face of the square magnetic shield cabin body is wound with 4-8 degaussing line groups, wherein, on the single face, the interval of adjacent degaussing line groups is 0.2-0.4m, and the single degaussing line group includes 2-4 turns of degaussing wire.

[0010] In an embodiment of the utility model, optionally, in any single face of the square magnetic shield cabin body, the threading hole is oppositely distributed at the first edge and the second edge of the single face, the input end and the output end of the degaussing line group of the single face are distributed at the two ends of the first edge, the second edge is the opposite edge of the first edge, the degaussing line group of the single face has a plurality of parallel wires that are parallelly and equally distributed, the number of the plurality of parallel wires is consistent with the number of threading holes distributed on the first edge, and each parallel wire is perpendicular to the first edge and the second edge.

[0011] In an embodiment of the utility model, optionally, each group of the parallel wire is wound around a pair of opposite distribution threading holes on the first edge and the second edge, wherein the winding mode of the first group of parallel wires of the degaussing wire group of the single face is that: from the first threading hole of the first edge at the input end of the degaussing wire group, an outer wire is formed on the outer wall of the single face, the outer wire extends to the second threading hole of the second edge, then penetrates into the square magnetic shielding cabin, an inner wire is formed on the inner wall of the single face, the inner wire extends back to the first threading hole, and penetrates out of the square magnetic shielding cabin through the first threading hole, completing the winding of the first group of parallel wires; the winding mode of other groups of parallel wires in the degaussing wire group of the single face is the same as that of the first group of parallel wires.

[0012] In an embodiment of the utility model, optionally, the degaussing wire group of the single face further comprises inter-wire leads, adjacent parallel wires in the degaussing wire group of the single face are connected in series by the inter-wire leads; the threading holes are equally spaced on the first edge and the second edge of the single face, and the lengths of the inter-wire leads between adjacent parallel wires in each group are consistent.

[0013] In an embodiment of the utility model, optionally, the threading hole is triangular or circular.

[0014] In an embodiment of the utility model, optionally, the first degaussing wire group takes the first threading hole at the input end position of the front side as the winding starting point, takes the third threading hole at the output end position of the front side as the winding ending point, completes the winding of the front side, and is connected in series to the second degaussing wire group through the inter-wire group lead; the second degaussing wire group takes the first threading hole at the input end position of the right side as the winding starting point, takes the third threading hole at the output end position of the right side as the winding ending point, completes the winding of the right side, and is connected in series to the third degaussing wire group through the inter-wire group lead; the third degaussing wire group takes the first threading hole at the input end position of the lower side as the winding starting point, takes the third threading hole at the output end position of the lower side as the winding ending point, completes the winding of the lower side, and is connected in series to the fourth degaussing wire group through the inter-wire group lead; the fourth degaussing wire group takes the first threading hole at the input end position of the back side as the winding starting point, takes the third threading hole at the output end position of the back side as the winding ending point, completes the winding of the back side, and is connected in series to the fifth degaussing wire group through the inter-wire group lead; the fifth degaussing wire group takes the first threading hole at the input end position of the left side as the winding starting point, takes the third threading hole at the output end position of the left side as the winding ending point, completes the winding of the left side, and is connected in series to the sixth degaussing wire group through the inter-wire group lead; the sixth degaussing wire group takes the first threading hole at the input end position of the upper side as the winding starting point, takes the third threading hole at the output end position of the lower side as the winding ending point, and completes the winding of the upper side; wherein the first threading hole and the third threading hole of each side are oppositely arranged at the two ends of the first edge of the side.

[0015] In an embodiment of the utility model, optionally, the degaussing coil further includes an inter-wire group lead, adjacent degaussing wire groups are connected in series through the inter-wire group lead, and the inter-wire group lead passes through the degaussing wire interface and communicates adjacent degaussing wire groups.

[0016] In an embodiment of the utility model, optionally, the square magnetic shielding room includes multiple layers of square magnetic shielding cabin bodies, the multiple layers of square magnetic shielding cabin bodies are connected in series from outside to inside, in any group of adjacent square magnetic shielding cabin bodies, the output end of the degaussing coil of the outer layer square magnetic shielding cabin body is connected in series with the input end of the degaussing coil of the inner layer square magnetic shielding cabin body; the input end of the first degaussing wire group of the outermost layer square magnetic shielding cabin body of the square magnetic shielding room and the output end of the sixth degaussing wire group of the innermost layer square magnetic shielding cabin body are respectively connected to external power supply equipment.

[0017] In an embodiment of the utility model, optionally, for each layer of square magnetic shielding cabin body inside the outermost layer square magnetic shielding cabin body of square magnetic shielding room, the winding start of front side surface of square magnetic shielding cabin body is led out to the outside of square magnetic shielding room through front side surface, and first external interface is formed, for each layer of square magnetic shielding cabin body outside the innermost layer square magnetic shielding cabin body of square magnetic shielding room, the winding end of upper side surface of square magnetic shielding cabin body is extended to the left side surface of square magnetic shielding cabin body and led out to the outside of square magnetic shielding room, and second external interface is formed, in each adjacent two layers of square magnetic shielding cabin body, the second external interface of outer layer square magnetic shielding cabin body is communicated with the first external interface of inner layer square magnetic shielding cabin body.

[0018] In an embodiment of the utility model, optionally, the front side surface of each layer of square magnetic shielding cabin body of square magnetic shielding room constitutes switchable door body, for each layer of square magnetic shielding cabin body, the winding end of front side surface of square magnetic shielding cabin body is led out to the outside of square magnetic shielding room from the non-opening side of front side surface, and first door body interface is formed, the winding start of right side surface of square magnetic shielding cabin body is led out to the outside of square magnetic shielding room from the left side surface of square magnetic shielding cabin body, and second door body interface is formed, and the first door body interface is communicated with the second door body interface.

[0019] The above technical scheme, aiming at the technical problem that the magnetic leakage at the corner position of the magnetic shielding room affects the demagnetization effect of the whole magnetic shielding room in the related art, distributes a plurality of groups of demagnetizing coils parallel to the edges and uniformly arranged on each face of the multi-layer square magnetic shielding cabin body, and the coils on opposite faces are parallel to each other, the coils on adjacent faces are perpendicular to each other, the currents in the groups of demagnetizing coils on the same face are the same in size and consistent in direction, the currents in the corresponding demagnetizing coils on opposite faces are opposite in direction, and the demagnetizing coils on the six faces are sequentially connected in series to form a series loop. Thus, a uniform magnetic field can be generated inside the layer-by-layer high magnetic permeability material, the magnetic leakage position can be effectively reduced, especially the magnetic leakage at the corner position of the magnetic shielding room, and the whole demagnetization effect of the magnetic shielding room can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structure schematic view of the demagnetization system for the square magnetic shielding room according to an embodiment of the utility model is shown.

[0022] Figure 2A six-sided schematic diagram of a demagnetization system for a square magnetic shielding room according to an embodiment of the present invention is shown;

[0023] Figure 3 A cross-sectional schematic diagram of a three-layer square magnetic shielding chamber according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the wiring on a single surface according to an embodiment of the present invention is shown;

[0025] Figure 5 The magnetic circuit distribution diagram of the demagnetization system for a square magnetic shielding room according to an embodiment of the present invention is shown in a finite element simulation experiment.

[0026] Figure 6 The magnetic circuit distribution diagram of the demagnetization system for a square magnetic shielding room according to another embodiment of the present invention is shown in the simulation results of the finite element simulation experiment.

Detailed Implementation Methods

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0028] Combination Figures 1 to 3 As shown, this utility model embodiment provides a demagnetization system for a square magnetic shielding room, including: a square magnetic shielding room 11, a demagnetizing coil 12, and a wire hole 13.

[0029] exist Figure 1 and Figure 2 In the middle, the square magnetic shielding room 11 is composed of a square magnetic shielding chamber, which includes a front side ①, a right side ②, a lower side ③, a rear side ④, a left side ⑤, and a top side ⑥.

[0030] In one possible design, a single face of the square magnetic shielding chamber is wound with 4-8 demagnetizing wire groups. On a single face, the spacing between adjacent demagnetizing wire groups is 0.2-0.4 m, and each demagnetizing wire group consists of 2-4 turns of demagnetizing wire. The more demagnetizing wire groups wound on a single face, and / or the more turns of demagnetizing wire in a single demagnetizing wire group, the higher the demagnetizing effect. Of course, the number of demagnetizing wire groups wound on a single face and the number of turns of demagnetizing wire in a single demagnetizing wire group can be increased based on actual demagnetizing effect requirements, and are not limited to the examples given in this utility model.

[0031] like Figure 3It can be seen that the degaussing coil 12 is distributed on the inner surface and the outer surface of the square magnetic shielding cabin body, and includes multiple degaussing coil groups, and the multiple degaussing coil groups are respectively: a first degaussing coil group 121 located on the front side ①, a second degaussing coil group 122 located on the right side ②, a third degaussing coil group 123 located on the lower side ③, a fourth degaussing coil group 124 located on the rear side ④, a fifth degaussing coil group 125 located on the left side ⑤, and a sixth degaussing coil group 126 located on the upper side ⑥.

[0032] Among them, the degaussing coil 12 is connected in series according to the order of the first degaussing coil group 121, the second degaussing coil group 122, the third degaussing coil group 123, the fourth degaussing coil group 124, the fifth degaussing coil group 125, and the sixth degaussing coil group 126, the degaussing coil groups on adjacent faces of the square magnetic shielding cabin body are distributed vertically, the degaussing coil groups on parallel faces of the square magnetic shielding cabin body are distributed in parallel and have the same number, and the degaussing coil group of any single face of the square magnetic shielding cabin body is parallel to the edge of the single face, and the degaussing coil groups of the single face are distributed at equal intervals.

[0033] The threading hole 13 is oppositely distributed at the opposite edges of each face of the square magnetic shielding cabin body, and the degaussing coil 12 is wound around each face of the square magnetic shielding cabin body through the threading hole 13.

[0034] The above technical scheme distributes multiple groups of degaussing coils parallel to the edges and uniformly arranged on each face of the multilayer square magnetic shielding cabin body, and the coils on opposite faces are parallel to each other, the coils on adjacent faces are perpendicular to each other, the currents in the groups of degaussing coils on the same face have the same size and consistent direction, the currents in the corresponding degaussing coils on opposite faces have opposite directions, and finally the degaussing coils on the six faces are connected in series to form a series loop. Thus, a uniform magnetic field can be generated inside the layer-by-layer high magnetic permeability material, the magnetic leakage position can be effectively reduced, especially the magnetic leakage at the corners of the magnetic shielding chamber can be reduced, and the overall degaussing effect of the magnetic shielding chamber can be improved.

[0035] In a possible design, as shown in Figure 4 In any single face of the square magnetic shielding cabin body 111, the threading hole 13 is oppositely distributed at the first edge and the second edge of the single face, the input end and the output end of the degaussing coil group of the single face are distributed at the two ends of the first edge, the second edge is the opposite edge of the first edge, the degaussing coil group of the single face has multiple groups of parallel wires distributed in parallel at equal intervals, the number of the multiple groups of parallel wires is consistent with the number of the threading holes 13 distributed at the first edge, and each group of parallel wires is perpendicular to the first edge and the second edge.

[0036] In Figure 4On the basis of the structure shown, each group of parallel wires is wound in a pair of opposite distributed threading holes 13 at the first edge and the second edge, wherein the winding mode of the first group of parallel wires of the demagnetization wire group of the single face is that: from the first threading hole a at the first edge which is the input end of the demagnetization wire group, an outer wire is formed on the outer wall of the single face, the outer wire extends to the corresponding second threading hole a' of the second edge after the first threading hole a, and then penetrates into the square magnetic shielding cabin 111, an inner wire is formed on the inner wall of the single face, the inner wire extends back to the first threading hole a, and then penetrates out of the square magnetic shielding cabin 111 through the first threading hole a, to complete the winding of the first group of parallel wires; the winding mode of other groups of parallel wires in the demagnetization wire group of the single face is the same as that of the first group of parallel wires.

[0037] The threading holes are distributed along the edges, and after the coil is wound, the generated magnetic field can maximize the coverage of the edge and corner positions of the magnetic shielding chamber, reduce the magnetic leakage of the edge and corner positions of the magnetic shielding chamber, and help to improve the overall demagnetization effect of the magnetic shielding chamber.

[0038] Among them, the demagnetization wire group of the single face further comprises a wire-to-wire lead 127 arranged at the first edge, and adjacent parallel wires in the demagnetization wire group of the single face are connected in series by the wire-to-wire lead 127; the threading holes 13 are distributed at equal intervals on the first edge and the second edge of the single face, and the lengths of the wire-to-wire leads 127 between adjacent parallel wires of each group are consistent.

[0039] It should be understood that, Figure 4 The four groups of parallel wires and the three wire-to-wire leads 127 in the structure shown are only an example of the present application, and in actual application scenarios, the number of parallel wires and the number of wire-to-wire leads 127 can be set based on the actual demagnetization effect requirements, and are not limited to the examples given in the present application.

[0040] Optionally, the hole type of the threading hole 13 is triangular or circular.

[0041] As Figure 1As shown, the first demagnetization wire group 121 takes the first threading hole a at the input end position of the front side 1 as the winding starting point, takes the third threading hole d at the output end position of the front side 1 as the winding ending point, completes the winding of the front side 1, and is connected in series to the second demagnetization wire group 122 through the inter-wire group lead; the second demagnetization wire group 122 takes the first threading hole a at the input end position of the right side 2 as the winding starting point, takes the third threading hole d at the output end position of the right side 2 as the winding ending point, completes the winding of the right side 2, and is connected in series to the third demagnetization wire group 123 through the inter-wire group lead; the third demagnetization wire group 123 takes the first threading hole a at the input end position of the lower side 3 as the winding starting point, takes the third threading hole d at the output end position of the lower side 3 as the winding ending point, completes the winding of the lower side 3, and is connected in series to the fourth demagnetization wire group 124 through the inter-wire group lead; the fourth demagnetization wire group 124 takes the first threading hole a at the input end position of the back side 4 as the winding starting point, takes the third threading hole d at the output end position of the back side 4 as the winding ending point, completes the winding of the back side 4, and is connected in series to the fifth demagnetization wire group 125 through the inter-wire group lead; the fifth demagnetization wire group 125 takes the first threading hole a at the input end position of the left side 5 as the winding starting point, takes the third threading hole d at the output end position of the left side 5 as the winding ending point, completes the winding of the left side 5, and is connected in series to the sixth demagnetization wire group 126 through the inter-wire group lead; the sixth demagnetization wire group 126 takes the first threading hole a at the input end position of the upper side 6 as the winding starting point, takes the third threading hole d at the output end position of the upper side 6 as the winding ending point, completes the winding of the upper side 6; wherein the connection line of the first threading hole a and the second threading hole a' of each side is perpendicular to the first edge and the second edge of the side, and the first threading hole a and the third threading hole d of each side are oppositely arranged at the two ends of the first edge of the side.

[0042] Optionally, the demagnetization coil 12 further comprises an inter-wire group lead 128 (not shown in the figure), adjacent demagnetization wire groups are connected in series through the inter-wire group lead 128, and the inter-wire group lead 128 passes through the demagnetization wire interface to connect adjacent demagnetization wire groups.

[0043] In a possible design, the square magnetic shielding chamber 11 comprises a plurality of layers of square magnetic shielding cabin bodies 111.

[0044] As shown, Figure 3 three layers of square magnetic shielding cabin bodies 111 can be provided, and the demagnetization coil 12 passes through the threading hole 13 at the edge position of each layer of square magnetic shielding cabin bodies 111, i.e. the position of the threading hole 13, to realize the winding of the square magnetic shielding chamber 11. The more the number of layers of square magnetic shielding cabin bodies 111, the higher the demagnetization effect. Of course, the number of layers of square magnetic shielding cabin bodies 111 can be increased based on the actual demagnetization effect requirement, and is not limited to the example given in the utility model.

[0045] In one possible design, the multi-layer square magnetic shielding cabins 111 are connected in series from outside to inside. In any set of adjacent square magnetic shielding cabins 111, the output end of the demagnetizing coil 12 of the outer square magnetic shielding cabin is connected in series with the input end of the demagnetizing coil 12 of the inner square magnetic shielding cabin. The input end of the first demagnetizing coil group of the outermost square magnetic shielding cabin of the square magnetic shielding chamber 11 and the output end of the sixth demagnetizing coil group of the innermost square magnetic shielding cabin are respectively connected to an external power supply device. In this technical solution, the demagnetizing coils of the multi-layer square magnetic shielding cabins are connected in series to form a loop, which is powered by the external power supply device to generate a corresponding magnetic field.

[0046] Specifically, the input end of the first demagnetizing coil group 121 of the outermost square magnetic shielding cabin of the square magnetic shielding chamber 11 and the output end of the sixth demagnetizing coil group 126 of the innermost square magnetic shielding cabin are respectively connected to an external power supply device. In adjacent layers of square magnetic shielding cabins of the square magnetic shielding chamber 11, the output end of the sixth demagnetizing coil group 126 of the outer square magnetic shielding cabin is connected to the input end of the first demagnetizing coil group 121 of the inner square magnetic shielding cabin on the outside of the square magnetic shielding chamber 11.

[0047] In each layer of square magnetic shielding cabins from the outermost square magnetic shielding cabin to the innermost square magnetic shielding cabin of the square magnetic shielding chamber 11, the winding start end of the front side face ① of the square magnetic shielding cabin extends out to the outside of the square magnetic shielding chamber 11 through the front side face ① to form a first external interface. Alternatively, the winding start end of the front side face ① of the square magnetic shielding cabin extends out to the outside of the square magnetic shielding chamber 11 through the first threading hole a of the front side face ① of the square magnetic shielding cabin and the first threading hole a of each layer of square magnetic shielding cabins outside the square magnetic shielding cabin in turn.

[0048] For each layer of square magnetic shielding cabins outside the innermost square magnetic shielding cabin of the square magnetic shielding chamber 11, the winding end of the upper side face ⑥ of the square magnetic shielding cabin extends to the left side face ⑤ of the square magnetic shielding cabin and extends out to the outside of the square magnetic shielding chamber 11 to form a second external interface. Alternatively, the winding end of the demagnetizing coil 12 of this square magnetic shielding cabin extends out to the outside of the square magnetic shielding chamber 11 through the left side face ⑤ of this inner square magnetic shielding cabin and each layer of square magnetic shielding cabins outside this inner square magnetic shielding cabin to form the second external interface of this inner square magnetic shielding cabin.

[0049] At this point, in each set of adjacent two layers of square magnetic shielding cabins, the second external interface of the outer square magnetic shielding cabin and the first external interface of the inner square magnetic shielding cabin are in communication, so that the square magnetic shielding cabins are connected in series. The two interfaces can be connected by a plug connector to avoid interference of the wiring with the door body.

[0050] On the basis of any of the above technical solutions, the front side ① of each layer of the square magnetic shielding cabin body of the square magnetic shielding chamber 11 is a switchable door body, for each layer of the square magnetic shielding cabin body, the winding end of the front side ① of the square magnetic shielding cabin body is led out to the outside of the square magnetic shielding chamber 11 from the non-opening side of the front side ① to form a first door body interface, the winding starting end of the right side ② of the square magnetic shielding cabin body is led out to the outside of the square magnetic shielding chamber 11 from the left side ⑤ of the square magnetic shielding cabin body, further, it can be extended to the left side ⑤ along the upper side ⑥ of the square magnetic shielding cabin body and led out to the outside of the square magnetic shielding chamber 11 to form a second door body interface, and the first door body interface and the second door body interface are communicated.

[0051] Specifically, for each inner layer of the square magnetic shielding cabin body in which the demagnetizing coil 12 is in the outermost layer of the square magnetic shielding cabin body, the winding end of the front side ① is extended to the first threading hole a of the front side ① from the third threading hole d of the front side ① along the inner side of the front side ①, and is sequentially led out from the first threading hole a of the front side ① and the first threading hole a of each layer of the square magnetic shielding cabin body outside the inner layer of the square magnetic shielding cabin body, to form the first door body interface of the inner layer of the square magnetic shielding cabin body.

[0052] Meanwhile, the winding end of the demagnetizing coil 12 on the front side ① of the outermost layer of the square magnetic shielding cabin body is extended to the first threading hole a of the front side ① from the third threading hole d of the front side ① along the inner side of the front side ①, and is led out from the first threading hole a of the front side ① to form the first door body interface of the outermost layer of the square magnetic shielding cabin body.

[0053] The winding starting end of the demagnetizing coil 12 on the right side ② of the inner layer of the square magnetic shielding cabin body is sequentially extended to the fourth threading hole d' and the third threading hole d of the upper side ⑥ along the inner side of the upper side ⑥ of the inner layer of the square magnetic shielding cabin body from the first threading hole a of the right side ② before winding the right side ②, and is sequentially led through the fourth threading hole d' of the left side ⑤ of the inner layer of the square magnetic shielding cabin body and the fourth threading hole d' of each layer of the square magnetic shielding cabin body outside the inner layer of the square magnetic shielding cabin body, to form the second door body interface of the inner layer of the square magnetic shielding cabin body.

[0054] Meanwhile, the winding starting end of the demagnetizing coil 12 on the right side ② of the outermost layer of the square magnetic shielding cabin body is sequentially extended to the fourth threading hole d' and the third threading hole d of the upper side ⑥ along the inner side of the upper side ⑥ of the outermost layer of the square magnetic shielding cabin body from the first threading hole a of the right side ② before winding the right side ②, and is led through the fourth threading hole d' of the left side ⑤ of the outermost layer of the square magnetic shielding cabin body to form the second door body interface of the outermost layer of the square magnetic shielding cabin body.

[0055] At this point, for each layer of the square magnetic shielding cabin of the square magnetic shielding room, the first door body interface is in communication with the second door body interface, the coil wiring of the front side ① to the right side ② is completed, and the wiring of the front side ① and the wiring of the right side ② are connected in series outside the door body. In this way, the coil wiring does not affect the opening and closing action of the door body, ensuring the convenience of the door body opening and closing, and the coil wiring will not be accumulated and pulled when the door body is opened and closed, avoiding damage to the coil wiring caused by opening and closing the door body. At the same time, the two interfaces outside the door body can be connected by plug-in connectors, which not only ensures the continuity of the magnetic circuit, but also avoids the interference or extrusion of the wiring at the door body when the door is opened and closed, thereby further improving the demagnetization capacity of the system.

[0056] Next, the coil winding mode of the demagnetization system for the square magnetic shielding room in the utility model will be described in detail. Figure 1

[0057] For completing the ① surface in the hexahedron, the coil winding mode is as follows:

[0058] From a input, through the outer surface of the high magnetic permeability material, to a', through a' into the internal space of the square magnetic shielding cabin 111, through the inner surface of the high magnetic permeability material, back to the threading hole a, complete the first group of parallel wiring winding of the ① surface; then thread out from the threading hole a, through the outer surface of the high magnetic permeability material, to the threading hole b, complete the lead wiring; from the threading hole b, through the outer surface of the high magnetic permeability material, to the threading hole b', then thread into the internal space of the square magnetic shielding cabin 111 from the b' threading hole, through the inner surface of the high magnetic permeability material, back to the threading hole b, complete the second group of parallel wiring winding of the ① surface; then thread out from the threading hole b, through the outer surface of the high magnetic permeability material, to the threading hole c, complete the lead wiring; from the threading hole c, through the outer surface of the high magnetic permeability material, to the threading hole c', then thread into the internal space of the square magnetic shielding cabin 111 from the c' threading hole, through the inner surface of the high magnetic permeability material, back to the threading hole c, complete the third group of parallel wiring winding of the ① surface; then thread out from the threading hole c, through the outer surface of the high magnetic permeability material, to the threading hole d, complete the lead wiring; from the threading hole d, through the outer surface of the high magnetic permeability material, to the threading hole d', then thread into the internal space of the square magnetic shielding cabin 111 from the d' threading hole, through the inner surface of the high magnetic permeability material, back to the threading hole d, complete the fourth group of parallel wiring winding of the ① surface.

[0059] At this point, the first demagnetization wire group 121 of the ① surface is connected. The wiring modes of the remaining ②, ③, ④, ⑤ and ⑥ surfaces are the same as the ① surface, and the connection of each group of demagnetization wires is carried out according to the current direction shown by the arrow in the Figure 1

[0060] After completing the connection of the demagnetization wire group of each surface, the coil winding mode of the six surfaces is as follows: ​​

[0061] The a of the outer side of the 1st surface is as an input terminal, the d of the inner side of the 1st surface is connected with the a of the outer side of the 2nd surface; the d of the inner side of the 2nd surface is connected with the a of the inner side of the 3rd surface; the d of the outer side of the 3rd surface is connected with the a of the inner side of the 4th surface; the d of the outer side of the 4th surface is connected with the a of the inner side of the 5th surface; the d of the outer side of the 5th surface is connected with the a of the outer side of the 6th surface; and the d of the inner side of the 6th surface is as an output terminal. The wiring mode adopts the mode that each adjacent surface is connected with each adjacent lead terminal, thereby avoiding the introduction of the extra leads in the connection process of the demagnetization lines of each group of surfaces, and further avoiding the influence of the additional magnetic field caused by the extra leads in the demagnetization process.

[0062] When the number of layers of the square magnetic shielding cabin 111 is two or more, each layer of the demagnetization coil adopts the above connection mode.

[0063] Finally, the output terminal 6d of the outer square magnetic shielding cabin is connected with the input terminal 1a of the inner square magnetic shielding cabin, and the output terminal of the innermost layer is as the final output terminal.

[0064] In addition, in order to avoid the interference of the demagnetization lines at the door body, the structure layout mode that the demagnetization lines are uniformly distributed on the door body is adopted.

[0065] The demagnetization system for the square magnetic shielding room is subjected to a finite element simulation experiment. In the first experiment, the outermost square magnetic shielding cabin is set as a square hexahedron with a size of 4*3*2.8m, and four groups of parallel wires are arranged on each surface, and the simulation experiment result is shown in FIG. 2, and a uniform magnetic field covering the corners can be generated. In the second experiment, the outermost square magnetic shielding cabin is also set as a square hexahedron with a size of 4*3*2.8m, eight groups of parallel wires are arranged on the 1st surface and the 4th surface, and six groups of parallel wires are arranged on the other four surfaces, and the simulation experiment result is shown in FIG. 3. Figure 5 Figure 6

[0066] The simulation results above show that the magnetic induction intensity distribution in the high magnetic permeability material is uniform, and the ratio of the magnetic induction intensity higher than the saturation magnetic induction intensity of the material is greater than 95%, and the corner leakage magnetic condition can be significantly reduced.

[0067] The technical scheme of the utility model is described in detail above in combination with the drawings, and the demagnetization coil suitable for the magnetic shielding room of each size of hexahedron is proposed through the technical scheme of the utility model, and the uniform arrangement and the controllable quantity can not only generate a uniform magnetic field in the high magnetic permeability material, but also reduce the corner leakage magnetic.

[0068] ​​It should be understood that, although the terms first, second, etc. can be used in the embodiments of the present application to describe the degaussing wire sets, these degaussing wire sets should not be limited to these terms. These terms are only used to distinguish the degaussing wire sets from each other. For example, the first degaussing wire set can also be referred to as the second degaussing wire set, and similarly, the second degaussing wire set can also be referred to as the first degaussing wire set, without departing from the scope of the embodiments of the present application.

[0069] The terms used in the embodiments of the present application are merely for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0070] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A degaussing system for a square magnetic shielded room, characterized in that, The square magnetic shielding room is composed of a square magnetic shielding cabin body, and the square magnetic shielding cabin body includes a front side, a back side, a left side, a right side, an upper side and a lower side. The degaussing coil is distributed on the inner and outer surfaces of the square magnetic shielding cabin body and includes a plurality of degaussing wire groups, which include a first degaussing wire group on the front side, a second degaussing wire group on the right side, a third degaussing wire group on the lower side, a fourth degaussing wire group on the back side, a fifth degaussing wire group on the left side, and a sixth degaussing wire group on the upper side. The degaussing coil is connected in series in the order of the first degaussing wire group, the second degaussing wire group, the third degaussing wire group, the fourth degaussing wire group, the fifth degaussing wire group and the sixth degaussing wire group.

2. The degaussing system according to claim 1, wherein the degaussing wire groups on adjacent sides of the square magnetic shielding cabin body are distributed vertically, and the degaussing wire groups on parallel sides of the square magnetic shielding cabin body are distributed in parallel and have the same number. The degaussing system further includes threading holes that are oppositely distributed at a first edge and a second edge of a single side, the second edge being the opposite edge of the first edge, and the degaussing wire group is vertically arranged with the first edge; the degaussing coil is wound around each side of the square magnetic shielding cabin body through the threading holes.

3. The degaussing system according to claim 2, wherein the degaussing wire group of a single side of the square magnetic shielding cabin body includes 4-8 parallel wires, each of the parallel wires includes 2-4 degaussing wires, the spacing between adjacent parallel wires is 0.2-0.4 m, and multiple parallel wires are arranged in parallel at equal intervals; the number of parallel wires of a single side is consistent with the number of threading holes distributed at the first edge.

4. The degaussing system according to claim 3, wherein each group of parallel wires is wound around a pair of oppositely distributed threading holes at the first edge and the second edge. The first group of parallel wires of the degaussing wire group of a single side is wound in the following manner: from the first threading hole at the first edge, which is the input end of the degaussing wire group, an outer wire is formed on the outer wall of the single side, the outer wire extends to the second threading hole at the second edge, then enters the square magnetic shielding cabin body, an inner wire is formed on the inner wall of the single side, the inner wire extends back to the first threading hole, and then exits the square magnetic shielding cabin body through the first threading hole, thus completing the winding of the first group of parallel wires. The winding manner of other groups of parallel wires in the degaussing wire group of a single side is the same as that of the first group of parallel wires.

5. The degaussing system according to claim 4, wherein the degaussing wire group of a single side further includes inter-wire leads, and adjacent parallel wires in the degaussing wire group of a single side are connected in series by the inter-wire leads.

6. The degaussing system according to claim 5, wherein ​ ​ ​ ​ ​ The degaussing coil further comprises an inter-winding lead wire, adjacent degaussing winding groups are connected in series through the inter-winding lead wire, and the inter-winding lead wire is connected to adjacent degaussing winding groups through the degaussing wire interface.

7. The degaussing system according to claim 6, wherein, the first degaussing winding group takes the first threading hole at the input end position of the front side as a winding starting point, takes the third threading hole at the output end position of the front side as a winding ending point, completes the winding of the front side, and is connected in series to the second degaussing winding group through the inter-winding lead wire; the second degaussing winding group takes the first threading hole at the input end position of the right side as a winding starting point, takes the third threading hole at the output end position of the right side as a winding ending point, completes the winding of the right side, and is connected in series to the third degaussing winding group through the inter-winding lead wire; the third degaussing winding group takes the first threading hole at the input end position of the lower side as a winding starting point, takes the third threading hole at the output end position of the lower side as a winding ending point, completes the winding of the lower side, and is connected in series to the fourth degaussing winding group through the inter-winding lead wire; the fourth degaussing winding group takes the first threading hole at the input end position of the back side as a winding starting point, takes the third threading hole at the output end position of the back side as a winding ending point, completes the winding of the back side, and is connected in series to the fifth degaussing winding group through the inter-winding lead wire; the fifth degaussing winding group takes the first threading hole at the input end position of the left side as a winding starting point, takes the third threading hole at the output end position of the left side as a winding ending point, completes the winding of the left side, and is connected in series to the sixth degaussing winding group through the inter-winding lead wire; the sixth degaussing winding group takes the first threading hole at the input end position of the upper side as a winding starting point, takes the third threading hole at the output end position of the lower side as a winding ending point, and completes the winding of the upper side; wherein the first threading hole and the third threading hole of each side are oppositely arranged at the two ends of the first edge of the side.

8. The degaussing system according to any one of claims 1 to 7, wherein, the square magnetic shielding room comprises a plurality of square magnetic shielding cabin bodies, and the plurality of square magnetic shielding cabin bodies are connected in series from the outside to the inside; in any group of adjacent square magnetic shielding cabin bodies, the output end of the degaussing coil of the outer square magnetic shielding cabin body is connected in series with the input end of the degaussing coil of the inner square magnetic shielding cabin body; the input end of the first degaussing winding group of the outermost square magnetic shielding cabin body of the square magnetic shielding room and the output end of the sixth degaussing winding group of the innermost square magnetic shielding cabin body are respectively connected to an external power supply device.

9. The degaussing system according to claim 8, wherein, for each square magnetic shielding cabin body inside the outermost square magnetic shielding cabin body of the square magnetic shielding room, the winding starting end of the front side of the square magnetic shielding cabin body is led out to the outside of the square magnetic shielding room through the front side to form a first external interface. For each layer of the square magnetic shielding cabin outside the innermost layer of the square magnetic shielding cabin of the square magnetic shielding room, the winding end of the upper side of the square magnetic shielding cabin extends out of the outside of the square magnetic shielding room through the left side of the square magnetic shielding cabin, forming a second external interface; In every two adjacent layers of the square magnetic shielding cabin, the second external interface of the outer layer of the square magnetic shielding cabin is in communication with the first external interface of the inner layer of the square magnetic shielding cabin.

10. The degaussing system of claim 8, wherein, The front side of each layer of the square magnetic shielding cabin of the square magnetic shielding room constitutes a switchable door body, for each layer of the square magnetic shielding cabin, The winding end of the front side of the square magnetic shielding cabin extends out of the outside of the square magnetic shielding room from the non-opening side of the front side, forming a first door body interface, The winding starting end of the right side of the square magnetic shielding cabin extends out of the outside of the square magnetic shielding room from the left side of the square magnetic shielding cabin, forming a second door body interface, The first door body interface is in communication with the second door body interface.

Images