CN112530659B - A simulation demagnetization current generating device for magnetism shielding section of thick bamboo demagnetization - Google Patents
A simulation demagnetization current generating device for magnetism shielding section of thick bamboo demagnetization Download PDFInfo
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- CN112530659B CN112530659B CN202011376402.3A CN202011376402A CN112530659B CN 112530659 B CN112530659 B CN 112530659B CN 202011376402 A CN202011376402 A CN 202011376402A CN 112530659 B CN112530659 B CN 112530659B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
Abstract
The invention relates to an analog demagnetizing current generating device for demagnetizing a magnetic shielding barrel, which is characterized in that a demagnetizing secondary coil group can stably and slowly move from one side of a demagnetizing primary coil group to the other side according to the speed set by a speed control module through a coil translation device, so that the process that the peak magnetic flux of a secondary coil is increased and then reduced is realized and completed, the demagnetizing current is quantitatively and smoothly changed, and a better demagnetizing effect is provided. The problem that the practical discontinuity of the demagnetization process can be caused by the fact that the demagnetization current is continuous but not smooth can be solved.
Description
Technical Field
The invention relates to a simulated demagnetization current generation device for demagnetization of a magnetic shielding barrel, which can generate stable and reproducible simulated demagnetization current for eliminating the remanence of materials of the magnetic shielding barrel, belongs to the technical field of demagnetization devices, and is particularly suitable for demagnetization research, demagnetization quantitative test and analysis, smooth and continuous control of demagnetization current and the like of the magnetic shielding barrel.
Background
In recent years, with the continuous development of quantum precision measurement technology, the measurement limit of many physical quantities is increasing. The weak magnetic measurement also enters a new era, a high-performance magnetic shielding cylinder is required to isolate external magnetic field interference in the field of ultra-high sensitive atomic magnetometer, atomic gyroscope and other equivalent precise measurement at present, and a double-layer or even multi-layer composite magnetic shielding cylinder structure is proposed to improve the weak magnetic measurement precision in the field. In the magnetic shielding barrel structure, each layer of magnetic shielding material of the magnetic shielding barrel needs to be demagnetized, particularly the inner layer of magnetic shielding material, and the remanence of the material can seriously affect the effect of magnetic shielding. In order to reduce the remanence of the inner magnetic shielding material, it is important to perform high-standard accurate degaussing treatment on the inner magnetic shielding material.
The traditional degaussing method comprises vibration degaussing, thermal degaussing and electric degaussing, and the common degaussing method in a laboratory is electric degaussing. The principle is that a secondary coil group connected with an inner magnetic shielding barrel is inserted into an electric demagnetizer at a constant speed and then is lifted slowly, so that the current which firstly oscillates and increases and then oscillates and attenuates is induced, and the magnetization intensity of a magnetic shielding material is saturated and then oscillates and tends to zero by the current.
However, in the conventional manual demagnetizer, the demagnetizing current waveform generated by the secondary coil group connected with the inner magnetic shielding barrel is influenced by different personnel and different lifting speeds, so that different remanence sizes and remanence distributions can be generated in each manual demagnetization, namely, the demagnetization repeatability and the quantification are not reliably ensured. In addition, although the program control demagnetizer can solve the problem of repeatability of demagnetizing remanence, the digital-to-analog conversion of the program control demagnetizer can generate step current, namely the demagnetizing current is continuous but not smooth, which can lead to the problem of practical discontinuity of the demagnetizing process, and then the result that the demagnetizing remanence has great randomness and large demagnetizing remanence is generated.
Disclosure of Invention
The invention provides a simulated demagnetization current generation device for demagnetization of a magnetic shielding cylinder, which can effectively ensure the repeatability of demagnetization and avoid the adverse effect of digital signal discontinuity on demagnetization, thereby effectively researching different demagnetization current waveforms, further guiding the demagnetization process and optimizing the demagnetization result.
The technical scheme of the invention is as follows: a simulation demagnetizing current generating device for demagnetizing a magnetic shielding cylinder comprises a demagnetizing primary coil group and a demagnetizing secondary coil group which are coaxially arranged, wherein a primary coil of the demagnetizing primary coil group is electrified with sine alternating current with preset frequency and preset amplitude during working, and the preset amplitude of the sine alternating current and the number of turns of the primary coil at least meet the requirement that the induced current of the demagnetizing secondary coil group can meet the maximum current requirement for demagnetizing the magnetic shielding cylinder; the secondary coil of the degaussing secondary coil group is connected with the coil wound on the magnetic shielding cylinder; the demagnetizing secondary coil group and the demagnetizing primary coil group are connected with the horizontal guide rail mechanism at least one, so that the demagnetizing secondary coil group can stably and slowly move from one side of the demagnetizing primary coil group to the other side through the inside of the demagnetizing primary coil group along the axial direction of the demagnetizing secondary coil group at a set speed under the control of the speed control module.
Preferably, the horizontal guide rail mechanism includes a guide rail bracket, a horizontal guide rail, and a guide rail moving member that is horizontally movable on the horizontal guide rail in the axial direction of the degaussing primary coil assembly, and the horizontal guide rail is fixed on a horizontal plane by the guide rail bracket.
Preferably, the degaussing primary coil group comprises a primary bracket, a primary solenoid and a primary coil uniformly wound on the primary solenoid; the degaussing secondary coil group comprises a secondary support, a secondary solenoid and a secondary coil uniformly wound on the secondary solenoid.
Preferably, the secondary solenoid is fixed to the secondary bracket, and the secondary bracket is fixed to the rail moving member, or the secondary bracket is the rail moving member; the primary solenoid is fixed on a horizontal plane by the primary bracket.
Preferably, the primary solenoid is fixed to the primary bracket, and the primary bracket is fixed to the rail moving part, or the primary bracket is the rail moving part; the secondary solenoid is fixed on a horizontal plane by the secondary bracket.
Preferably, the horizontal rail mechanism includes a first horizontal rail mechanism and a second horizontal rail mechanism, the horizontal rails of the first horizontal rail mechanism and the second horizontal rail mechanism are fixed on the horizontal plane by rail brackets, the primary solenoid is fixed on the primary bracket, the primary bracket is fixed on the rail moving part of the first horizontal rail mechanism, or the primary bracket is the rail moving part of the first horizontal rail mechanism; and the secondary solenoid is fixed on the secondary support, and the secondary support is fixed on the guide rail moving part of the second horizontal guide rail mechanism, or the secondary support is the guide rail moving part of the second horizontal guide rail mechanism.
Preferably, the primary coil is connected to a signal generator and a power amplifier.
Preferably, the horizontal guide rail mechanism is made of a non-magnetic material.
Compared with the prior art, the invention has the advantages that:
the invention relates to a simulated demagnetizing current generating device for demagnetizing a magnetic shielding barrel, which is used for ensuring that a large current alternating current electric energy preset and connected by a demagnetizing primary coil group meets the maximum current requirement of demagnetizing operation, and a demagnetizing secondary coil group can stably and slowly move from one side to the other side of the demagnetizing primary coil group according to the speed set by a speed control module, so that the process that the peak magnetic flux of a secondary coil is increased and then reduced is realized and completed, the demagnetizing current is quantitatively and smoothly changed, and a better demagnetizing effect is provided. Therefore, the problem that different remanence sizes and remanence distributions can occur in each manual demagnetization caused by the fact that the demagnetizing current generated in the manual demagnetization of the conventional magnetic shielding cylinder is influenced by different personnel and different lifting speeds is solved, and the problem that the demagnetizing current is continuous but not smooth and the actual discontinuity of the demagnetizing process can be caused by the fact that the digital-to-analog conversion of the program-controlled demagnetizer generates step current can be avoided.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of an analog demagnetizing current generating device for demagnetizing a magnetic shielding cylinder according to the present invention.
The reference numbers in the figures are: 1-demagnetized primary coil group, 11-primary solenoid, 12-primary coil, 13-primary support, 2-demagnetized secondary coil group, 21-secondary solenoid, 22-secondary coil, 3-coil translation device, 31-horizontal guide rail mechanism, 311-guide rail support, 312-horizontal guide rail.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to specific examples and comparative examples.
Example 1
As shown in fig. 1, the analog demagnetizing current generating device for demagnetizing a magnetic shielding cylinder of the present invention comprises a demagnetizing primary coil group 1, a demagnetizing secondary coil group 2 and a coil translation device 3; the degaussing primary coil group 1 and the degaussing secondary coil group 2 are coaxially arranged, the degaussing primary coil group 1 comprises a primary solenoid 11, a primary coil 12 and a primary bracket 13, and the primary coil 12 is uniformly wound on the primary solenoid 11; the primary solenoid 11 is fixed on a horizontal plane by the primary bracket 13. The degaussing secondary coil group 2 comprises a secondary solenoid 21, a secondary coil 22 and a secondary support; the secondary coil 22 is uniformly wound around the secondary solenoid 21. When the primary coil 12 works, a sine alternating current with a preset frequency and a preset amplitude is supplied, and the preset amplitude of the sine alternating current and the number of turns of the primary coil 12 at least meet the requirement that the induced current of the degaussing secondary coil group can reach the maximum current requirement of degaussing of the magnetic shielding cylinder; the secondary coil 22 is connected with a coil wound on the magnetic shielding cylinder;
the coil translation device 3 comprises a horizontal guide rail mechanism 31 and a speed control module, the horizontal guide rail mechanism 31 comprises a guide rail bracket 311, a horizontal guide rail 312 and a guide rail moving part which can horizontally move on the horizontal guide rail 312 along the axial direction of the degaussing primary coil group 1, the horizontal guide 312 may be arranged directly at the location of the axis of the degaussing primary coil assembly 1, the secondary bracket fixes the demagnetizing secondary coil group 2 on the guide rail moving component, the axis of the degaussing secondary coil group 2 is coincided with the axis of the degaussing primary coil group 1, and the whole degaussing secondary coil group 2 can stably and slowly pass through the interior of the degaussing primary coil group 1 along the axis direction thereof at a set speed under the control of the speed control module, namely, the degaussing secondary coil group 2 can relatively move from one side to the other side through the interior thereof. Therefore, the process that the peak value magnetic flux of the secondary coil 22 is increased and then reduced is realized and completed, so that the demagnetization current is quantitatively and smoothly changed, and a better demagnetization effect is provided. In addition, a mechanical device is used, the speed control module accurately controls the moving speed of the demagnetizing secondary coil group, the generated demagnetizing current waveform is continuously controllable, and then the analog control of any current waveform is realized, so that the demagnetizing repeatability of the magnetic shielding barrel and the accuracy of quantitative demagnetizing are favorably analyzed. Therefore, the problem that different remanence sizes and remanence distributions can occur in each manual demagnetization caused by the fact that the demagnetizing current generated in the manual demagnetization of the conventional magnetic shielding cylinder is influenced by different personnel and different lifting speeds is solved, and the problem that the demagnetizing current is continuous but not smooth and the actual discontinuity of the demagnetizing process can be caused by the fact that the digital-to-analog conversion of the program-controlled demagnetizer generates step current can be avoided.
Preferably, the horizontal guiding rail mechanism 31 is made of a non-metal material, so as to avoid unnecessary electromagnetic induction in the guiding rail area and unnecessary electromagnetic loss. In operation, the horizontal rail 312 is fixed on a horizontal plane by the rail bracket 311 and is kept stable.
Example 2
Unlike the above embodiment, the primary solenoid 11 is fixed to the primary bracket 13, the primary bracket 13 is fixed to the rail moving part, or the primary bracket 13 is the rail moving part 131; the secondary solenoid 21 is fixed on a horizontal plane by the secondary bracket. The axis of the degaussing secondary coil group 2 is coincident with the axis of the degaussing primary coil group 1, the diameter of the secondary solenoid 21 is smaller than that of the primary solenoid 11, and the degaussing primary coil group 1 can move stably and slowly, namely from one side to the other side of the degaussing secondary coil group 2 along the axis direction at a set speed under the control of the speed control module. Therefore, the process that the peak value magnetic flux of the secondary coil 22 is increased and then reduced is realized and completed, so that the demagnetization current is quantitatively and smoothly changed, and a better demagnetization effect is provided.
Example 3
Unlike the above-described embodiment, the horizontal rail mechanism 31 includes a first horizontal rail mechanism and a second horizontal rail mechanism, the primary solenoid 11 is fixed to the primary bracket 13, the primary bracket 13 is fixed to a first rail moving part of the first horizontal rail mechanism, or the primary bracket 13 is the first rail moving part; the secondary solenoid 21 is fixed to a second rail moving part of the second horizontal rail mechanism through the secondary bracket, or the primary bracket 13 is the second rail moving part. The axis of the degaussing secondary coil group 2 is coincident with the axis of the degaussing primary coil group 1, the diameter of the secondary solenoid 21 is smaller than that of the primary solenoid 11, the first horizontal guide rail is arranged on a horizontal plane along the axis direction of the degaussing primary coil group 1, and the degaussing primary coil group 1 as a whole can freely move along the first horizontal guide rail of the first horizontal guide rail mechanism at a set speed under the control of the speed control module; the second horizontal guide rail is arranged at the axial position of the demagnetizing secondary coil group 2, and the demagnetizing secondary coil group 2 can move freely along the second horizontal guide rail of the second horizontal guide rail mechanism at a set speed under the control of the speed control module. Through the cooperative control of the speed control module, the demagnetizing secondary coil group 2 and the demagnetizing primary coil group 1 stably and slowly move relatively at a set speed, so that the process that the peak value magnetic flux of the secondary coil 22 is increased and then reduced is realized and completed, the demagnetizing current is quantitatively and smoothly changed, and a better demagnetizing effect is provided.
It should be noted that the above-described embodiments may enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.
Claims (11)
1. The device is characterized by comprising a degaussing primary coil group and a degaussing secondary coil group which are coaxially arranged, wherein a primary coil of the degaussing primary coil group is supplied with sine alternating current with preset frequency and preset amplitude during working, and the preset amplitude of the sine alternating current and the number of turns of the primary coil at least meet the requirement that the induced current of the degaussing secondary coil group can meet the maximum current requirement of degaussing of a magnetic shielding cylinder; the secondary coil of the degaussing secondary coil group is connected with the coil wound on the magnetic shielding cylinder; the demagnetizing secondary coil group and/or the demagnetizing primary coil group stably and slowly generate relative movement along the axial direction of the demagnetizing secondary coil group at a set speed under the control of the speed control module, so that the demagnetizing secondary coil group relatively moves from one side of the demagnetizing primary coil group to the other side through the interior of the demagnetizing primary coil group.
2. The device for generating an analog demagnetizing current for demagnetizing a magnetic shielding cylinder according to claim 1, wherein the horizontal rail mechanism comprises a rail bracket, a horizontal rail, and a rail moving member horizontally movable on the horizontal rail in an axial direction of the demagnetizing primary coil assembly, and the horizontal rail is fixed on a horizontal plane by the rail bracket.
3. The analog demagnetizing current generating device for demagnetizing a magnetic shielding cylinder according to claim 2, wherein the demagnetizing primary coil assembly comprises a primary bracket, a primary solenoid, and a primary coil uniformly wound around the primary solenoid; the degaussing secondary coil group comprises a secondary support, a secondary solenoid and a secondary coil uniformly wound on the secondary solenoid.
4. The analog demagnetizing current generating device for demagnetizing a magnetic shielding cartridge according to claim 3, wherein the secondary solenoid is fixed to the secondary bracket, the secondary bracket is fixed to the guide rail moving part, or the secondary bracket is the guide rail moving part; the primary solenoid is fixed on a horizontal plane by the primary bracket.
5. The analog demagnetizing current generating device for demagnetizing a magnetic shielding cylinder according to claim 3, wherein the primary solenoid is fixed to the primary bracket, and the primary bracket is fixed to the rail moving part, or the primary bracket is the rail moving part; the secondary solenoid is fixed on a horizontal plane by the secondary bracket.
6. The analog demagnetizing current generating device for demagnetizing a magnetic shielding cylinder according to claim 3, wherein the horizontal rail mechanism comprises a first horizontal rail mechanism and a second horizontal rail mechanism, the horizontal rails of the first horizontal rail mechanism and the second horizontal rail mechanism are fixed on a horizontal plane by rail brackets, the primary solenoid is fixed on the primary bracket, and the primary bracket is fixed on the rail moving part of the first horizontal rail mechanism or is the rail moving part of the first horizontal rail mechanism; and the secondary solenoid is fixed on the secondary support, and the secondary support is fixed on the guide rail moving part of the second horizontal guide rail mechanism, or the secondary support is the guide rail moving part of the second horizontal guide rail mechanism.
7. An analog demagnetizing current generating device for demagnetizing magnetic shielding cartridge according to claim 1, 2, 4, 5 or 6, wherein the primary coil is connected to a signal generator and a power amplifier.
8. An analog demagnetizing current generating device for demagnetizing magnetic shielding cartridge according to claim 3, wherein the primary coil is connected to a signal generator and a power amplifier.
9. An analog demagnetizing current generating device for demagnetizing magnetic shielding cylinder according to claim 1, 2, 4, 5, 6 or 8, wherein the horizontal rail mechanism is made of a non-magnetic material.
10. An analog demagnetizing current generating device for demagnetizing magnetic shielding cylinder according to claim 3, wherein the horizontal rail mechanism is made of a non-magnetic material.
11. An analog demagnetizing current generating device for demagnetizing magnetic shielding cartridges, according to claim 7, wherein the horizontal rail mechanism is made of a non-magnetic material.
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| CN202011376402.3A CN112530659B (en) | 2020-11-30 | 2020-11-30 | A simulation demagnetization current generating device for magnetism shielding section of thick bamboo demagnetization |
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| CN202011376402.3A CN112530659B (en) | 2020-11-30 | 2020-11-30 | A simulation demagnetization current generating device for magnetism shielding section of thick bamboo demagnetization |
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