A device for generating a three-dimensional magnetic field

Abstract

The present invention discloses a device for generating a three-dimensional magnetic field, including a winding tube, wherein the winding tube is a round tube and has a wire groove on the outer wall, a group of solenoid coils and two groups of saddle-shaped coils are superimposed and arranged in the wire groove on the outer wall of the winding tube, and the solenoid coils and the saddle-shaped coils are both connected to a power supply. The present invention adopts a round tube-shaped winding tube, and winds a group of solenoid coils and two groups of saddle-shaped coils to form a three-dimensional magnetic field with uniform magnetic field. The solenoid coils and the saddle-shaped coils are small in size and are both wound in the wire groove on the winding tube, and do not occupy space, so that the entire three-dimensional magnetic field generating device is small in size, and is in a round tube shape as a whole, and can be well embedded with a magnetic shielding barrel; in addition, the winding tube is hollow, which is convenient for placing objects such as samples and transmitting signals.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic field, and in particular relates to a generating device for providing a three-dimensional magnetic field for a quantum magnetometer. Background Art

[0002] The magnetic coil uses electric current to pass through the wire of the coil to generate a magnetic field. It can generally be placed in a magnetic shielding barrel for magnetic compensation in a magnetic shielding environment.

[0003] Traditional three-dimensional magnetic field generating devices generally adopt the design of three groups of circular Helmholtz coils, and the overall layout is spherical. However, the uniform magnetic field area generated by this traditional structure of magnetic field generating device is very limited in scale and has low space utilization. In addition, the three-dimensional magnetic field generating device composed of three groups of Helmholtz coils is relatively large in size. If it is placed in a magnetic shielding barrel, the magnetic shielding barrel also needs to have a large volume. The spherical three-dimensional magnetic field generating device placed in the magnetic shielding barrel will also lead to low efficiency of the three-dimensional magnetic field generator and the magnetic shielding barrel, resulting in a waste of space. Since the magnetic shielding barrel is generally a cylinder, and its precision leads to difficult manufacturing processes and high manufacturing costs, therefore, designing a three-dimensional magnetic field generating device with high integration with the magnetic shielding barrel and small volume is a technical problem that urgently needs to be improved. Summary of the invention

[0004] The object of the present invention is to solve the above-mentioned problem and provide a three-dimensional magnetic field generating device which has a high degree of fit with a magnetic shielding barrel and a small volume.

[0005] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a three-dimensional magnetic field generating device, including a winding tube, which is a circular tube and has a wire groove on the outer wall, a group of solenoid coils and two groups of saddle-shaped coils are superimposed in the wire groove on the outer wall of the winding tube, and the solenoid coils and the saddle-shaped coils are both connected to a power supply.

[0006] Furthermore, the winding tube includes a tube body, a tube wall of which is evenly spaced with a plurality of annular grooves along the tube core direction, a tube wall of the tube body is also provided with a straight groove parallel to the tube core, and the plurality of annular grooves are interconnected through the straight grooves.

[0007] Furthermore, through hole one, through hole two and through hole three are opened on the tube wall of the tube body, and the hole cores of through hole one, through hole two and through hole three are located in the same plane and the plane is perpendicular to the tube core of the tube body.

[0008] Furthermore, the hole cores of through hole one and through hole three are located on the same straight line, and the hole core of through hole two is perpendicular to the straight line where the hole cores of through hole one and through hole three are located.

[0009] Furthermore, the straight grooves are arranged along the circumference of the tube body, two straight grooves are arranged between through hole one and through hole two, and between through hole two and through hole three, and five straight grooves are arranged between through hole one and through hole three. The line connecting two adjacent straight grooves and the tube core of the tube body is arranged at an angle of 30°, and the line connecting the straight grooves on both sides of the through hole and the tube core of the tube body is arranged at an angle of 60°.

[0010] Furthermore, the depth of the straight groove is greater than the depth of the annular groove.

[0011] Furthermore, the power source connected to the solenoid coil and the saddle coil is a low-noise current source.

[0012] Furthermore, the winding tube is made of polytetrafluoroethylene material.

[0013] The beneficial effect of adopting the above technical scheme is: a three-dimensional magnetic field generating device of the present invention adopts a circular tubular winding tube, and winds a group of solenoid coils and two groups of saddle-shaped coils to form a three-dimensional magnetic field with a uniform magnetic field. The solenoid coils and the saddle-shaped coils are small in size and are both wound in the wire grooves on the winding tube, without taking up space, so that the entire three-dimensional magnetic field generating device is small in size and has a circular tubular shape as a whole, which can be well embedded in the magnetic shielding barrel; in addition, the winding tube is hollow, which is convenient for placing objects such as samples and transmitting signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 , 2 It is a schematic diagram of the structure of the present invention;

[0015] Figure 3 It is a front view of the present invention;

[0016] Figure 4 yes Figure 3 A-section view. DETAILED DESCRIPTION

[0017] In conjunction with the accompanying drawings, a three-dimensional magnetic field generating device includes a winding tube 10, the winding tube 10 is a round tube and has a wire groove on the outer wall, a group of solenoid coils and two groups of saddle-shaped coils are superimposed and arranged in the wire groove on the outer wall of the winding tube 10, and the solenoid coils and the saddle-shaped coils are both connected to a power supply. By arranging a group of solenoid coils and two groups of saddle-shaped coils to form a three-dimensional magnetic field, it has the advantages of small size and compact structure compared with the traditional Helmholtz coil. The round tube winding tube is used as the coil attachment skeleton, and the three groups of coils are superimposed and placed in the wire groove of the winding tube, which almost does not occupy additional space. In this way, only one round tube is needed to form a three-dimensional magnetic field generating device. When the device is used in a magnetic shielding environment, the device and the magnetic shielding barrel are both cylindrical, which can be well embedded without causing space waste, and can effectively reduce the volume of the magnetic shielding barrel. In addition, the winding tube is hollow, which is convenient for placing objects such as samples and transmitting signals.

[0018] Furthermore, the winding bobbin 10 includes a tube body 11, a plurality of annular grooves 12 are evenly spaced along the tube core direction on the tube wall of the tube body 11, and a straight groove 13 parallel to the tube core is also formed on the tube wall of the tube body 11, and the plurality of annular grooves 12 are interconnected through the straight grooves 13, and the depth of the straight grooves 13 is greater than the depth of the annular grooves 12. The annular grooves 12 and the straight grooves 13 are formed on the tube wall of the tube body 11, and the grooves are connected to each other, so as to facilitate the winding of the coil. During the specific winding, the solenoid coil starts from the top annular groove 12, and after winding one circle, it goes down along the straight groove 13 to the next annular groove 12, and then goes down along the straight groove 13 to the next annular groove 12 after winding one circle, and repeats this cycle until it reaches the bottom annular groove 12; a group of saddle-shaped coils includes two symmetrically arranged coils, starting from the top annular groove 12, winding 120° along the annular groove 12, and then going down along the straight groove 13 to the bottom annular groove 12, and then winding 120° in the opposite direction along the annular groove 12, and then going up along the straight groove 13 to close with the wire in the top annular groove 12 to form a closed loop, and two such wire coils are symmetrically arranged to form a group of saddle-shaped coils, and the symmetry planes in the two groups of saddle-shaped coils are arranged perpendicular to each other.

[0019] Furthermore, the tube wall of the tube body 11 is provided with a through hole 14, a through hole 2 15, and a through hole 3 16, and the cores of the through holes 14, the through holes 2 15, and the through holes 3 16 are located in the same plane and the plane is perpendicular to the tube core of the tube body 11. The cores of the through holes 14 and the through holes 3 16 are located on the same straight line, and the core of the through hole 2 15 is perpendicular to the straight line where the cores of the through holes 14 and the through holes 3 16 are located. The through holes are provided on the tube wall of the tube body 11, which can effectively increase the light transmittance of the three-dimensional magnetic field and can also well ensure the signal transmission in the three-dimensional magnetic field. Specifically, the through holes 14, the through holes 2 15, and the through holes 3 16 are all provided with circular grooves 17, the center of the circular grooves 17 is located on the middle plane of two adjacent annular grooves 12, and the circular groove 14 is connected with four adjacent annular grooves 12. The center of the circular groove 17 is located in the middle of two adjacent annular grooves 12, that is, there are four annular grooves 12 symmetrically distributed on the upper and lower sides of the center of the circular groove 17. When winding, the wires in the two annular grooves 12 located on the upper side of the center of the circular groove 17 are bypassed from the grooves in the upper half of the circular groove 17, and the wires in the two annular grooves 12 located on the lower side of the center of the circular groove 17 are bypassed from the grooves in the lower half of the circular groove 17. In this way, the wires can be symmetrical up and down at the position of the circular groove 17, so that they can offset each other when generating a magnetic field, which effectively ensures the uniformity of the entire magnetic field and effectively improves the transmittance of the magnetic field.

[0020] Furthermore, the straight grooves 13 are arranged along the circumference of the tube body 11, and two straight grooves 13 are arranged between the through hole 14 and the through hole 2 15, and between the through hole 2 15 and the through hole 3 16, and five straight grooves 13 are arranged between the through hole 14 and the through hole 3 16. The line between the adjacent two straight grooves 13 and the tube core of the tube body 11 is arranged at an angle of 30°, and the line between the straight grooves 13 on both sides of the through hole and the tube core of the tube body 11 is arranged at an angle of 60°. Specifically, there are 9 straight grooves 13, which are arranged at an angle of 30° or 60° to each other, which is convenient for winding the saddle coil.

[0021] Furthermore, the power source connected to the solenoid coil and the saddle coil is a low-noise current source. Since the current noise of the current source will be directly introduced through the coil to become magnetic field noise, the coil is driven by a low-noise current source to reduce the magnetic field noise.

[0022] Furthermore, the winding tube 10 is made of polytetrafluoroethylene material. Polytetrafluoroethylene is a high molecular polymer with good insulation effect. When used as a winding tube material, it can effectively reduce interference with the magnetic field.

Claims

1. A device for generating a three-dimensional magnetic field, characterized in that: The invention comprises a winding tube (10), wherein the winding tube (10) is a round tube and has a wire groove on its outer wall, wherein a group of solenoid coils and two groups of saddle-shaped coils are superimposed and arranged in the wire groove on the outer wall of the winding tube (10), and the solenoid coils and the saddle-shaped coils are both connected to a power source; The winding bobbin (10) comprises a tube body (11), a tube wall of the tube body (11) is provided with a plurality of annular grooves (12) evenly spaced apart in the direction of the tube core, a tube wall of the tube body (11) is also provided with a straight groove (13) parallel to the tube core, and the plurality of annular grooves (12) are interconnected via the straight groove (13); The tube wall of the tube body (11) is provided with a through hole 1 (14), a through hole 2 (15), and a through hole 3 (16), and the cores of the through hole 1 (14), the through hole 2 (15), and the through hole 3 (16) are located in the same plane and the plane is perpendicular to the tube core of the tube body (11); The hole cores of the through hole one (14) and the through hole three (16) are located on the same straight line, and the hole core of the through hole two (15) is perpendicular to the straight line where the hole cores of the through hole one (14) and the through hole three (16) are located; The straight grooves (13) are arranged along the circumference of the tube body (11); two straight grooves (13) are arranged between the through hole 1 (14) and the through hole 2 (15), and between the through hole 2 (15) and the through hole 3 (16); five straight grooves (13) are arranged between the through hole 1 (14) and the through hole 3 (16); the lines connecting the two adjacent straight grooves (13) and the tube core of the tube body (11) are arranged at an angle of 30°; and the lines connecting the straight grooves (13) on both sides of the through hole and the tube core of the tube body (11) are arranged at an angle of 60°; The depth of the straight groove (13) is greater than the depth of the annular groove (12).

2. A three-dimensional magnetic field generating device according to claim 1, characterized in that: The power source to which the solenoid coil and the saddle coil are connected is a low noise current source.

3. The device for generating a three-dimensional magnetic field according to claim 1, characterized in that: The bobbin (10) is made of polytetrafluoroethylene material.

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