CN109616278A - A kind of intelligent nano powder demagnetizer and demagnetization method - Google Patents
A kind of intelligent nano powder demagnetizer and demagnetization method Download PDFInfo
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- CN109616278A CN109616278A CN201910078484.4A CN201910078484A CN109616278A CN 109616278 A CN109616278 A CN 109616278A CN 201910078484 A CN201910078484 A CN 201910078484A CN 109616278 A CN109616278 A CN 109616278A
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- demagnetization
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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Abstract
The invention discloses a kind of intelligent nano powder demagnetizers, including control module, amplitude amplification module, power amplifier module and anti-magnetized coil；The signal input part of the signal output end connection amplitude amplification module of the control module, the signal input part of the signal output end connection power amplifier module of the amplitude amplification module, the power amplifier module and anti-magnetized coil are electrically connected.Also disclosing a kind of demagnetization method is that control module according to the control instruction of input generates sine wave signal, and sine wave signal be input in anti-magnetized coil after amplitude amplification and power amplification to generate erasing field.The advantage is that: the present invention can accurately control frequency, erasing time, demagnetization number, intensity of erasing field of erasing current etc., different demagnetization schemes can be worked out according to different demagnetization objects, is particularly suitable for nanoscale powder demagnetization.
Description
Technical field
The present invention relates to demagnetizer fields, and in particular to a kind of intelligent nano powder demagnetizer and demagnetization method.
Background technique
Demagnetizer in the prior art mostly uses greatly low frequency high current to generate the alternating magnetic field being exponentially gradually reduced,
To achieve the purpose that demagnetization.When demagnetization object it is relatively large sized when, the demagnetizer of the prior art can play preferable demagnetization
Effect.But the substance minimum to nanoscale size is usually needed to carry out demagnetization in actual use.Such as when doing transmission electron microscope
It needs to aoxidize nanoscale metal and its oxide powder, is otherwise easy to appear the problem of powder is reunited.And the prior art
In demagnetizer to diameter when 100nm powder below carries out demagnetization, since the size of its erasing field is not easy to control, when
When erasing field is excessive, powder can be made to generate fuel factor in demagnetization and sinter block into.Demagnetizer i.e. in the prior art
The own shape of demagnetization object can be destroyed when to nanometer powder demagnetization.Therefore, right when carrying out demagnetization to nanoscale powder
In the control of the magnetic field size of erasing field be the key that demagnetization.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is an object of that present invention to provide a kind of intelligent nano powder demagnetizations
Device and demagnetization method.The present invention can accurately control the frequency of erasing current, the erasing time, demagnetization number, erasing field intensity
Deng can work out different demagnetization schemes according to different demagnetization objects, be particularly suitable for nanoscale powder demagnetization.
A kind of intelligent nano powder demagnetizer of the present invention, including control module, amplitude amplification module, power amplification
Module and anti-magnetized coil；The signal input part of the signal output end connection amplitude amplification module of the control module, it is described
The signal input part of the signal output end connection power amplifier module of amplitude amplification module, the power amplifier module and demagnetization
Coil is electrically connected.
Preferably, the control module generates sine wave signal according to the control instruction of input and is input to amplitude amplification mould
In block；The amplitude amplification module is input in power amplifier module after carrying out amplitude amplification to sine wave signal；Described
Power amplifier module generates erasing current after carrying out power amplification to sine wave signal, and erasing current is input to anti-magnetized coil
Middle generation erasing field；The control instruction includes demagnetization number, erasing time and erasing current frequency.
Preferably, the control module includes STM32 single-chip microcontroller, further include with STM32 single-chip microcontroller be electrically connected when
Clock circuit and reset circuit.
It preferably, further include capacitance touch screen, the capacitance touch screen and control module signal interaction.
It preferably, further include for powering for control module, amplitude amplification module, power amplifier module and capacitance touch screen
Power module of voltage regulation.
Preferably, the amplitude amplification module is program-controlled voltage amplifier, and the program-controlled voltage amplifier includes
VCA821 chip.
Preferably, the power amplifier module includes TDA7294 chip.
Preferably, the anti-magnetized coil is high frequency coil, has been equipped in two endfaces of the high frequency coil
Machine glass plate is equipped with high-frequency iron oxygen magnetic stripe, the high frequency on the wherein one piece of surface of poly (methyl methacrylate) plate far from high frequency coil
Ferrimagnetic item is evenly arranged around the center of end face.
Preferably, the anti-magnetized coil is in the form of annular discs, a diameter of 130mm-150mm；The poly (methyl methacrylate) plate is
Square, its side length is 170mm-190mm, with a thickness of 3mm-5mm.
A kind of demagnetization method are as follows: control module generates sine wave signal according to the control instruction of input, by sine wave signal
It is input in anti-magnetized coil after the amplification of carry out amplitude and power amplification and generates erasing field.
A kind of intelligent nano powder demagnetizer and demagnetization method of the present invention, the advantage is that:
1, control module generates sine wave signal according to control instruction, and sine wave signal carries out width by amplitude amplification module
Then degree amplification provides erasing current after power amplifier module carries out power amplification for anti-magnetized coil, erasing current is disappearing
Erasing field is generated at magnetic coil, and demagnetization is carried out to the object for needing demagnetization.It, can since sine wave signal is generated by control module
Frequency, erasing time, demagnetization number, the intensity of erasing field etc. that erasing current is accurately controlled by control module, can basis
Different demagnetization objects works out different demagnetization schemes.And degaussing process is automatically controlled by control module, is not necessarily to manual adjustment.
The present invention can carry out demagnetization to different size of demagnetization object, be particularly suitable for nanoscale powder demagnetization, can accurately control and disappear
The power in magnetic magnetic field, solve the problems, such as powder because magnetic field is excessive cause to be sintered it is blocking.
2, single-chip microcontroller control is stablized, and cost is relatively low, is suitable as the control element of control module of the invention.
3, the single-chip microcontroller of STM32 series, has the advantages that high-performance, low cost, low energy consumption.
4, capacitance touch screen is used for the signal exported according to control module, shows the relevant information of demagnetizer, i.e. display disappears
The relevant information of magnetic process, and dependent instruction can be inputted to control module by capacitance touch screen, it is mainly used for inputting demagnetization
The relevant parameter of journey.Capacitance touch screen has the advantages that manipulation is convenient, realizes human-computer interaction by capacitance touch screen.
5, power module of voltage regulation can export different voltage, such as ± 20V ,+5V ,+3.3V, to meet disparate modules
Operating voltage requirements.
6, program-controlled voltage amplifier has the characteristics that process control can be passed through, and can control its enlargement range, makes this
Invention can preferably control the relevant parameter of degaussing process.VCA821 chip is with gain amplification effect is good, does not need outside
The advantages of buffer circuit, voltage control gain change linearly, and have good controllability.
7, TDA7294 chip has the advantages that small in size, output power, the small and defencive function of distortion are perfect.It is suitable for
For the core element of power amplifier module of the invention.The power amplifier module being made of the chip has bandwidth, power big,
It is able to satisfy the amplification of different erasing currents, advantage applied widely.
8, poly (methyl methacrylate) plate is used for mounting degaussing coil, and the high-frequency iron oxygen magnetic stripe being evenly arranged around end face center is in coil
The magnetic induction intensity of anti-magnetized coil can linearly be enhanced after energization, can be generated by controlling the state modulator anti-magnetized coil of erasing current
Erasing field intensity.Since the magnetic induction intensity of high-frequency iron oxygen magnetic stripe and the size of erasing current are in a linear relationship, so high
Frequency ferrimagnetic item also enhances the controllability of anti-magnetized coil while the magnetic induction intensity for enhancing anti-magnetized coil.
9, anti-magnetized coil shape and size can obtain good erasing field, the shape and size processing side of poly (methyl methacrylate) plate
Just, good fixing effect.
Detailed description of the invention
Fig. 1 is a kind of module frame chart of intelligent nano powder demagnetizer of the present invention；
Fig. 2 is the circuit diagram of amplitude amplification module；
Fig. 3 is the circuit diagram of power amplifier module；
Fig. 4 is the top view of anti-magnetized coil；
Fig. 5 is the main view of anti-magnetized coil；
Fig. 6 is a kind of step flow chart of demagnetization method of the present invention.
Description of symbols: 1- control module, 2- amplitude amplification module, 3- power amplifier module, 4- anti-magnetized coil, 5- electricity
Hold touch screen, 6- poly (methyl methacrylate) plate, 61- high-frequency iron oxygen magnetic stripe.
Specific embodiment
As shown in Figure 1, a kind of intelligent nano powder demagnetizer of the present invention, including control module 1, amplitude amplify mould
Block 2, power amplifier module 3 and anti-magnetized coil 4；The letter of the signal output end connection amplitude amplification module 2 of the control module 1
Number input terminal, the signal input part of the signal output end connection power amplifier module 3 of the amplitude amplification module 2 are described
Power amplifier module 3 and anti-magnetized coil 4 are electrically connected.
The operation principle of the present invention is that: control module 1 generates sine wave signal according to control instruction, amplifies mould by amplitude
Block 2 carries out amplitude amplification, is input in power amplifier module 3 after reaching the voltage amplitude for being enough driving power amplification module 3.Function
Rate amplification module 3 carries out power amplification to signal, then conveys erasing current from amplified signal to anti-magnetized coil 4.Demagnetization
Electric current enters the alternating magnetic field of generation vertical direction after anti-magnetized coil 4, the magnetic field, that is, erasing field.Erasing field is in magnetic field
Demagnetization object carries out demagnetization.The frequency and amplitude that generated sine wave is controlled by control module, can control erasing current
Frequency, erasing time, demagnetization number, intensity of erasing field etc. work out different demagnetization schemes according to different demagnetization objects.
Degaussing process is automatically controlled by control module, is not necessarily to manual adjustment.Present invention is particularly suitable for nanoscale powder
Last demagnetization can be effectively controlled the power of erasing field, solve the problems, such as powder because magnetic field is excessive cause to be sintered it is blocking.
The control module 1 includes single-chip microcontroller, further includes the clock circuit and reset circuit being electrically connected with single-chip microcontroller.
The single-chip microcontroller is STM32 single-chip microcontroller.The single-chip microcontroller of STM32 series, has the advantages that high-performance, low cost, low energy consumption.It is suitable
Cooperation is the control element of control module 1 of the invention.
It further include capacitance touch screen 5, the capacitance touch screen 5 and 1 signal interaction of control module.Capacitance touch screen 5 is used
In the status information for inputting operation instruction and showing demagnetizer, finishing man-machine interaction.Capacitance touch screen has manipulation convenient excellent
Point.
It further include for powering for control module 1, amplitude amplification module 2, power amplifier module 3 and capacitance touch screen 5
Power module of voltage regulation.Operating voltage needed for different modules is different, so needing that the regulated power supply with multi output end is arranged
Module provides operating voltage of different sizes.Such as ± 20V ,+5V ,+3.3V.
The amplitude amplification module 2 is program-controlled voltage amplifier, and the program-controlled voltage amplifier includes VCA821 core
Piece.The power amplifier module 3 includes TDA7294 chip.
STM32 single-chip microcontroller uses 3.3V power supply power supply, and the amplitude of output signal is less than 3V, and anti-magnetized coil 4 will generate and disappear
Magnetic magnetic field needs to be passed through the sine-wave current of ampere order of magnitude.So must be put by output signal of the circuit to single-chip microcontroller
Greatly.The amplification of amplitude main program-controlled voltage amplifier is completed, and VCA821 chip internal circuits are as shown in Fig. 2, mainly by two
Input buffer and output current feedback amplifier composition, are configured to complete variable gain amplifier, amplifier does not need outer
Portion's buffering.Maximum gain may be set between 6 decibels and 32 decibels.When using ± 5V power supply power supply, gain-controlled voltage exists
0V to+2V variation, as unit of dB, output can be 0 between 20dB for VCA821 chip gain.The voltage control of VCA821 chip
Linear change is presented in gain processed, and gain amplification effect is good.
TDA7294 chip is the product of Yi Fa Microtronic A/S, which has small in size, output power, distortion small
The perfect feature with defencive function.Using the circuit of power amplifier module 3 composed by the chip as shown in figure 3, can use
Positive-negative power power supply is ± 20V in voltage, and output power has reached the output power of 60W or so, has been capable of providing sufficiently large disappear
Magnetoelectricity stream.
The anti-magnetized coil 4 is high frequency coil, is equipped with organic glass in two endfaces of the high frequency coil
Plate 6 is equipped with high-frequency iron oxygen magnetic stripe 61, the high-frequency iron on the wherein one piece of surface of poly (methyl methacrylate) plate 6 far from high frequency coil
Oxygen magnetic stripe 61 is evenly arranged around the center of end face.The anti-magnetized coil 4 is in the form of annular discs, a diameter of 130mm-
150mm；The poly (methyl methacrylate) plate 6 is square, and its side length is 170mm-190mm, with a thickness of 3mm-5mm.
As shown in Figure 4, Figure 5, in the present embodiment, anti-magnetized coil 4 uses diameter for the metal copper enameled wire coiling of 0.50mm,
Shape is in disk form.The inductance of anti-magnetized coil 4 is 30mH, diameter 140mm.Two end face difference up and down of anti-magnetized coil 4
By two panels with a thickness of 4mm, side length is that the square organic glass of 180mm is fixed.Wherein the bottom of a piece of organic glass surrounds
The center of end face has been evenly arranged four high-frequency iron oxygen magnetic stripes, to enhance magnetic induction intensity, and then enhances erasing field, mentions
The erasure effect of high anti-magnetized coil.
A kind of demagnetization method is that control module 1 according to the control instruction of input generates sine wave signal, by sine wave signal
It is input in anti-magnetized coil 4 after the amplification of carry out amplitude and power amplification and generates erasing field.Control instruction includes in the present embodiment
Demagnetization number, erasing time and erasing current frequency.Amplitude is carried out to sine wave signal by above-mentioned amplitude amplification module 2 to put
Greatly, power amplification is carried out to sine wave signal by power amplifier module 3, then generates erasing current and is input to anti-magnetized coil 4
Middle generation erasing field carries out demagnetization to demagnetization object.
Control flow of the invention after demagnetizer booting as shown in fig. 6, initialized, at the beginning of the timer in clock circuit
Beginningization, capacitance touch screen 5 initialize, and each module is initialized.Demagnetizer, which enters, waits instruction input state.If capacitive touch
Touching screen 5 has instruction input, and demagnetizer will be prompted to input the number of continuous demagnetization, the time of demagnetization each time and erasing current frequency
The numerical value of rate.After three's input, system exports the sine voltage of specified parameter, carries out by amplitude amplification module 2
Amplitude amplification.It is then input in power amplifier module 3, carries out power amplification by power amplifier module 3, be input to degaussing coil
Circle 4 generates erasing field and carries out demagnetization.
For those skilled in the art, it can make other each according to the above description of the technical scheme and ideas
The corresponding change of kind and deformation, and all these changes and deformation all should belong to the protection model of the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of intelligent nano powder demagnetizer, which is characterized in that including control module (1), amplitude amplification module (2), power
Amplification module (3) and anti-magnetized coil (4)；The letter of signal output end connection amplitude amplification module (2) of the control module (1)
Number input terminal, the signal input part of signal output end connection power amplifier module (3) of the amplitude amplification module (2), institute
The power amplifier module (3) stated and anti-magnetized coil (4) are electrically connected.
2. a kind of intelligent nano powder demagnetizer according to claim 1, which is characterized in that described control module (1) root
Sine wave signal is generated according to the control instruction of input to be input in amplitude amplification module (2)；The amplitude amplification module (2) is right
Sine wave signal is input in power amplifier module (3) after carrying out amplitude amplification；The power amplifier module (3) is to sine wave
Signal generates erasing current after carrying out power amplification, and erasing current is input in anti-magnetized coil (4) and generates erasing field；Institute
The control instruction stated includes demagnetization number, erasing time and erasing current frequency.
3. a kind of intelligent nano powder demagnetizer according to claim 2, which is characterized in that control module (1) packet
STM32 single-chip microcontroller is included, further includes the clock circuit and reset circuit being electrically connected with STM32 single-chip microcontroller.
4. a kind of intelligent nano powder demagnetizer according to claim 1, which is characterized in that it further include capacitance touch screen (5),
The capacitance touch screen (5) and control module (1) signal interaction.
5. a kind of intelligent nano powder demagnetizer according to claim 4, which is characterized in that further include for being control module
(1), the power module of voltage regulation of amplitude amplification module (2), power amplifier module (3) and capacitance touch screen (5) power supply.
6. a kind of intelligent nano powder demagnetizer according to claim 1, which is characterized in that the amplitude amplification module
It (2) is program-controlled voltage amplifier, the program-controlled voltage amplifier includes VCA821 chip.
7. a kind of intelligent nano powder demagnetizer according to claim 1, which is characterized in that the power amplifier module
It (3) include TDA7294 chip.
8. a kind of intelligent nano powder demagnetizer according to claim 1, which is characterized in that the anti-magnetized coil (4) is
High frequency coil is equipped with poly (methyl methacrylate) plate (6) in two endfaces of the high frequency coil, wherein one piece of poly (methyl methacrylate) plate
(6) surface far from high frequency coil is equipped with high-frequency iron oxygen magnetic stripe (61), and the high-frequency iron oxygen magnetic stripe (61) is around end face
Center is evenly arranged.
9. a kind of intelligent nano powder demagnetizer according to claim 8, which is characterized in that the anti-magnetized coil (4) is in
It is discoid, a diameter of 130mm-150mm；The poly (methyl methacrylate) plate (6) is square, and its side length is 170mm-190mm, thick
Degree is 3mm-5mm.
10. a kind of demagnetization method using any intelligent nano powder demagnetizer of claim 1-9, which is characterized in that control
Molding block (1) generates sine wave signal according to the control instruction of input, and sine wave signal is carried out amplitude amplification and power amplification
After be input in anti-magnetized coil (4) and generate erasing field.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113903545A (en) * | 2021-10-14 | 2022-01-07 | 杭州诺驰生命科学有限公司 | Demagnetizing device, demagnetizing system and demagnetizing method for geomagnetic shielding room |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006230124A (en) * | 2005-02-18 | 2006-08-31 | Nippon Denji Sokki Kk | Power supply for magnetization |
| CN101231269A (en) * | 2007-01-23 | 2008-07-30 | 林俊明 | Electromagnetic ultrasonic transducer capable of charging or discharging magnetism for build-in permanent magnet as well as use method |
| CN101702361A (en) * | 2009-11-17 | 2010-05-05 | 430000武汉市长江电气发展有限公司 | Ultra-low frequency alternating-current (AC) constant-current demagnetization device of large transformer or mutual inductor and demagnetization detection method |
| CN202134309U (en) * | 2011-05-10 | 2012-02-01 | 上海瑞穗磁气有限公司 | Intelligent demagnetizer |
| CN104134526A (en) * | 2014-06-27 | 2014-11-05 | 青岛众海汇智能源科技有限责任公司 | Annular coil structure |
| CN105225791A (en) * | 2015-10-30 | 2016-01-06 | 北京自动化控制设备研究所 | A kind of overall degaussing gear of magnetic screen bucket |
| TW201631878A (en) * | 2015-02-16 | 2016-09-01 | 國立成功大學 | High frequency magnetizing device |
| US20170133884A1 (en) * | 2015-11-11 | 2017-05-11 | Broadcom Corporation | Power transmitting unit with adjustable field and methods for use therewith |
| CN108933015A (en) * | 2018-07-20 | 2018-12-04 | 深圳普诺玛商业安全设备有限公司 | The control method of degaussing circuit, demagnetizer and degaussing circuit |
-
2019
- 2019-01-28 CN CN201910078484.4A patent/CN109616278B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006230124A (en) * | 2005-02-18 | 2006-08-31 | Nippon Denji Sokki Kk | Power supply for magnetization |
| CN101231269A (en) * | 2007-01-23 | 2008-07-30 | 林俊明 | Electromagnetic ultrasonic transducer capable of charging or discharging magnetism for build-in permanent magnet as well as use method |
| CN101702361A (en) * | 2009-11-17 | 2010-05-05 | 430000武汉市长江电气发展有限公司 | Ultra-low frequency alternating-current (AC) constant-current demagnetization device of large transformer or mutual inductor and demagnetization detection method |
| CN202134309U (en) * | 2011-05-10 | 2012-02-01 | 上海瑞穗磁气有限公司 | Intelligent demagnetizer |
| CN104134526A (en) * | 2014-06-27 | 2014-11-05 | 青岛众海汇智能源科技有限责任公司 | Annular coil structure |
| TW201631878A (en) * | 2015-02-16 | 2016-09-01 | 國立成功大學 | High frequency magnetizing device |
| CN105225791A (en) * | 2015-10-30 | 2016-01-06 | 北京自动化控制设备研究所 | A kind of overall degaussing gear of magnetic screen bucket |
| US20170133884A1 (en) * | 2015-11-11 | 2017-05-11 | Broadcom Corporation | Power transmitting unit with adjustable field and methods for use therewith |
| CN108933015A (en) * | 2018-07-20 | 2018-12-04 | 深圳普诺玛商业安全设备有限公司 | The control method of degaussing circuit, demagnetizer and degaussing circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113903545A (en) * | 2021-10-14 | 2022-01-07 | 杭州诺驰生命科学有限公司 | Demagnetizing device, demagnetizing system and demagnetizing method for geomagnetic shielding room |
| CN113903545B (en) * | 2021-10-14 | 2023-06-06 | 杭州诺驰生命科学有限公司 | Demagnetizing device, demagnetizing system and demagnetizing method for geomagnetic shielding room |
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Application publication date: 20190412 Assignee: Yulin Landaxun Electronic Technology Co.,Ltd. Assignor: Yulin Normal University Contract record no.: X2022450000543 Denomination of invention: An intelligent nano powder degaussing device and degaussing method Granted publication date: 20210511 License type: Common License Record date: 20221229 |
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