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Random-direction dynamic vector uniform magnetic field generating device and control system

A technology of dynamic vector and uniform magnetic field, applied in measuring devices, electromagnetic circuit devices, measuring magnetic variables, etc., can solve the urgent needs of difficult to meet the uniformity, time-varying, directivity and high precision of magnetic field control, poor dynamic performance, The direction of the application range is uncontrollable, etc., to achieve the effects of good stability, high magnetic field accuracy and convenient use

Inactive Publication Date: 2018-09-14
深圳市启荣科技发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application range is severely restricted by factors such as uncontrollable direction and poor dynamic performance. It is difficult to meet the urgent needs of scientific research and engineering measurement for magnetic field control uniformity, time-varying, directivity and high precision in the new era.

Method used

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  • Random-direction dynamic vector uniform magnetic field generating device and control system
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  • Random-direction dynamic vector uniform magnetic field generating device and control system

Examples

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Embodiment 1

[0037] Such as figure 1 As shown in -6, the device for generating a dynamic vector uniform magnetic field in any direction provided by Embodiment 1 of the present invention includes; three sets of orthogonally placed Helmholtz coils 1, non-magnetic non-magnetic structural components and three-channel current sources; three sets The Helmholtz coils 1 are respectively wound around the X-axis, Y-axis, and Z-axis of the space coordinate system; each group of Helmholtz coils 1 includes two enamelled copper coils coaxially wound clockwise in series, The axial spacing of two enamelled copper coils in the same group is equal to the radius of the enamelled copper coils. The symmetry plane of each group of Helmholtz coils 1 is placed in a two-two orthogonal relationship with the geometric center of the device as the origin; the three-channel current source has three current output channels, which are independent from the X-axis, Y-axis, and Z-axis. Electrical connections that do not in...

Embodiment 2

[0076] Such asfigure 1 As shown in -6, Embodiment 2 of the present invention also provides a control system for a dynamic vector uniform magnetic field generator in any direction, including: a control device and the dynamic vector uniform magnetic field generator in any direction provided in Embodiment 1.

[0077] In an optional solution of this embodiment, the control device can realize circuit-independent and time-synchronized current output program control. Thus, a dynamic vector uniform magnetic field in any direction with controllable size, waveform and timing is generated.

[0078] In the optional scheme of this embodiment, such as Figure 6 As shown, the control device 6 includes a computer 61, a single-chip microcomputer 62, a chip 63 and a voltage-current conversion amplifier 64. The computer is electrically connected with the single-chip microcomputer, the single-chip computer is electrically connected with the chip, and the chip is electrically connected with the v...

Embodiment 3

[0081] Circular Helmertz coils belong to the magnetic field analysis of axisymmetric coils. In order to reduce the workload during calculation, the following assumptions should generally be followed:

[0082] 1. The coils are coaxially wound and distributed symmetrically in the center;

[0083] 2. The turns are evenly wound, the current section is uniform, and the current direction is in a right-handed spiral relationship with the symmetry axis;

[0084] 3. The turns are insulated, and the spacing is infinitely close, and all the turns fill the space occupied by the coil.

[0085] Such as figure 2 As shown, for any coaxial circular Helmertz coil, the calculation of the magnetic field at the central axis is required. Therefore, take the center point P(0,0,0), set the distance between the two coils as d, the radii are both R and coaxial, and take the midpoint of the line connecting the centers of the two coils as x=0, you can get:

[0086]

[0087] When d=R, the magnetic ...

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Abstract

The invention provides a random-direction dynamic vector uniform magnetic field generating device and a control system, and relates to the technical fields of magnetic field generation and control andrelated magnetism testing engineering. The device comprises three groups of orthogonally-placed Helmholtz coils, a non-magnetic structural component and a three-channel current source. The three groups of Helmholtz coils are respectively wound around the X-axis, Y-axis and Z-axis of a space coordinate system, wherein the X-axis, the Y-axis, and the Z-axis are taken as the axes. Each Helmholtz coil comprises two enamelled copper coils which are coaxially wound clockwise in series, wherein the axial spacing of the two enamelled copper coils of the same group is the same as the radius of the enamelled copper coils. A uniform magnetic field in any direction and with adjustable size and variable timing sequence can be generated in the space near the geometric center of the device, thereby effectively solving a problem of the urgent need for uniformity, time-varying, directionality and high precision of the magnetic field.

Description

technical field [0001] A dynamic vector uniform magnetic field generating device in any direction and a control system relate to the technical field of magnetic field generation, control and measurement. The device can be widely used in experimental basic physics research, performance testing and characterization of magnetic materials, biomagnetism interdisciplinary experiments, and calibration of magnetic sensors and actuators. Background technique [0002] The methods of artificially generating a magnetic field include two technical routes: using a magnet to generate a magnetic field and using a current-carrying conductor to generate a magnetic field. [0003] Among them, the basic principle of using magnets to generate magnetic fields is to use pre-magnetized materials with a certain strength of residual magnetization (such as NdFeB, NdFeB) to pre-process into a certain shape, and through a specific spatial arrangement, it can be generated within a certain range. Non-uni...

Claims

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Application Information

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IPC IPC(8): G01R33/00G01R35/00H01F7/06
CPCG01R33/0035G01R35/007H01F7/06H01F7/064
Inventor 张卜元张明吉李晓龙于春姝刘先国陈正华
Owner 深圳市启荣科技发展有限责任公司
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