CN108089495A - A kind of magnetic current member control apparatus - Google Patents
A kind of magnetic current member control apparatus Download PDFInfo
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- CN108089495A CN108089495A CN201711326865.7A CN201711326865A CN108089495A CN 108089495 A CN108089495 A CN 108089495A CN 201711326865 A CN201711326865 A CN 201711326865A CN 108089495 A CN108089495 A CN 108089495A
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- electromagnet
- control apparatus
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- pwm
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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Abstract
The invention discloses a kind of magnetic current member control apparatus, the device includes at least driving unit and electromagnet array, wherein, control module is set in the driving unit, for generating the state of each electromagnet in the drive signal control electromagnet array according to operation program；The electromagnet array is made of multiple monomer electromagnet, for making corresponding electromagnet state change according to drive signal and then changing spatial magnetic field to control magnetic fluid that corresponding spatial distribution is presented.Compared with prior art, the present invention can easily realize the control to magnetic fluid behavior using electromagnet array, while circuit structure of the present invention is simple, and required circuit components are relatively easy to obtain, and at low cost.
Description
Technical field
The invention belongs to magnetic fluid control technology fields, and in particular to a kind of magnetic current member control apparatus.
Background technology
Nowadays, with the fast development of nanometer material science, the application of nano level magnetic material is more and more extensive.Its
In, the magnetic fluid using Fe3O4 nano particles as representative is subject to extensive use in industrial circle, not only with liquid mobility but also
Magnetism with solid magnetic material, be by the magnetic retention particles of a diameter of nanometer scale (less than 10 nanometers), base load liquid (
It is media) and a kind of colloidal liquid of stabilization that mixes of interfacial agent three.The fluid nonmagnetic suction in static state
Gravitation when externally-applied magnetic field acts on, just shows magnetism, and just because of this, it just has a wide range of applications in practice, in theory
It is upper that there is very high learning value.The magnetic fluid produced with nano metal and alloy powder is had excellent performance, and can be widely applied to each
The fields such as magnetic fluid seal, damping, medical instrument, the sound of kind harsh conditions are adjusted, light is shown, magnetic fluid ore dressing.It is existing
In technology, magnetic fluid is widely used in industrial circle, but rarely has and is applied in the fields such as craftwork, ornament.However, magnetic fluid
As a kind of new functional material, the corresponding Behavioral change that can be made according to the variation in local environment magnetic field utilizes the spy
Property, the following space that is necessarily also widely used in fields such as craftwork, ornaments.And control of the prior art for magnetic fluid
Technology and scheme it is very few, almost blank out, it is only be also mechanical structure is taken to add permanent magnet form form, control
Fluency and changeability it is poor, it is impossible to meet requirement of the people to increasingly exquisite craftwork and ornament.
Therefore for drawbacks described above present in currently available technology, it is really necessary to be studied, to provide a kind of scheme,
Solve defect in the prior art.
The content of the invention
The defects of in order to overcome the prior art, the present invention propose a kind of magnetic current member control apparatus, real using electromagnet array
Existing magnetic fluid control, and simple circuit module is designed, the control of the behavior for magnetic fluid is realized well, has filled up this
The blank in field.
In order to solve technical problem existing in the prior art, technical scheme is as follows：
A kind of magnetic current member control apparatus, the device include at least driving unit and electromagnet array, wherein, the driving is single
Control module in member is set, each electromagnet in the electromagnet array is controlled for generating drive signal according to operation program
State；The electromagnet array is made of multiple monomer electromagnet, for making corresponding electromagnet state change according to drive signal
And then change spatial magnetic field to control magnetic fluid that corresponding spatial distribution is presented.
As preferred technical solution, the driving unit sets multi-channel electromagnet drive module, per road solenoid actuated
Module is used to drive one or more electromagnet.
As preferred technical solution, the solenoid actuated module includes at least PWM wave generation circuit, multiple selector
And power amplifier, wherein,
The PWM wave generation circuit, for generating the pwm signal of multiple and different duty cycles；
The multiple selector and the PWM wave generation circuit, multiple input end connects the PWM of different duty respectively
Signal, output terminal are connected with the power amplifier, for corresponding according to the selection output of the control instruction of control module
Pwm signal；
The power amplifier, the pwm signal for being exported to the multiple selector is amplified to be believed with output driving
Number drive electromagnet.
As preferred technical solution, the PWM wave generation circuit includes multiple 555 timers, each 555 timer quilt
It is configured to generate the pwm signal of certain duty cycle.
As preferred technical solution, the magnetic fluid is arranged in transparent carrier, the transparent carrier and the electromagnet
Array is closely set, and behavior change occurs according to the changes of magnetic field that electromagnet array generates for the magnetic fluid being arranged in transparent carrier
Change.
As preferred technical solution, input module is further included, the input module is connected with the driving unit, uses
It is instructed in input control, the driving unit generates drive signal according to the control instruction.
As preferred technical solution, the power amplifier is D-type audio power amplifier.
As preferred technical solution, a diode of connecting between the D-type audio power amplifier and electromagnet array.
As preferred technical solution, the control module uses microcontroller.
As preferred technical solution, the PWM wave generation circuit is integrated in the control module.
Compared with prior art, the present invention has the following technical effect that：
1. the present invention can easily realize the control to magnetic fluid behavior using electromagnet array.
2. circuit structure of the present invention is simple, required circuit components are relatively easy to obtain, and at low cost.
3. the control circuit principle for the magnetic fluid left-right and front-back behavior that the present invention realizes is easy to be expanded into each side of magnetic fluid
To so three-dimensional behaviour control.
Description of the drawings
Fig. 1 is the overall structure figure of the present invention.
Fig. 2 is the functional block diagram of solenoid actuated module in the present invention.
Fig. 3 is the functional block diagram of solenoid actuated module another embodiment.
Fig. 4 is the circuit diagram that PWM wave generates.
Fig. 5 is electromagnet array schematic diagram.
Fig. 6 is the concrete structure diagram of the embodiment of the present invention 2.
Fig. 7 is the magnetic fluid direction of motion schematic diagram in embodiment 2.
Fig. 8 is the flow chart that embodiment 2 is realized.
Fig. 9 is the FB(flow block) of control method of the present invention.
Specific examples below will be further illustrated the present invention with reference to above-mentioned attached drawing.
Specific embodiment
Further explanation is done to the present invention with reference to embodiment and attached drawing.Following embodiments do not limit in any form
The system present invention, all technical solutions obtained by the way of equivalent substitution are all belonged to the scope of protection of the present invention interior.
Referring to Fig. 1, the functional block diagram of magnetic current member control apparatus is shown, the device is including at least driving unit and electromagnet
Array, wherein, electromagnet array is made of multiple monomer electromagnet, and control module and multi-channel electromagnet are set in driving unit
Drive module is used to drive one or more electromagnet per road solenoid actuated module.Operation program in control module, driving are single
Member generates drive signal according to the operation program and controls the state of each electromagnet in electromagnet array；Due to each electromagnet
State it is different, electromagnet array is caused to generate different spatial magnetic fields, for specific drive signal, electromagnet array will
Specific spatial magnetic field is generated, so that corresponding spatial distribution is presented in magnetic fluid.It is generated by program setting different
Drive signal, magnetic fluid is with regard to that can be presented dynamic space distribution.Using above-mentioned technical proposal, magnetic fluid is as ornament, display
In the applications such as product, craftwork, the variable form of various smoothnesses can be presented, meet to increasingly exquisite craftwork and ornament
Application requirement.
Further, magnetic fluid is arranged in transparent carrier, which is closely set with electromagnet array, is arranged on
According to the changes of magnetic field that electromagnet array generates Behavioral change occurs for the magnetic fluid in transparent carrier, so that magnetic fluid product
Dynamic change is presented, there is preferable visual effect.
Further, input module is further included, the input module is connected with the driving unit, for input control
Instruction, the driving unit generate drive signal according to the control instruction.Client can set electromagnet battle array by input module
The state change of row, so as to fulfill the movement locus of editor's magnetic fluid.
Further, control module may be employed fpga chip or other similar to MCU chip, it is enough so as to generate
Road solenoid actuated signal.Theoretically, setting electromagnet quantity is more in electromagnet array, and the control accuracy of magnetic fluid is higher.
However magnetic fluid is in the applications such as ornament, exhibit, craftwork, in order to which product can be promoted effectively in the market,
Cost is the factor that must take into consideration.Fpga chip and its comparable chip of performance are although powerful, but price is equally also high,
This will cause competitiveness of the magnetic fluid product in middle and low-end market to substantially reduce.For this purpose, the present invention provides a kind of lower cost solution,
Common microcontroller is only needed with regard to application demand can be met.Referring to Fig. 2, the principle frame of solenoid actuated module in the present invention is shown
Figure, solenoid actuated module include at least PWM wave generation circuit, multiple selector and power amplifier, wherein, PWM wave generates
Circuit, for generating the pwm signal of multiple and different duty cycles；Using independent PWM wave generation circuit, so as to overcome common list
The technical issues of piece machine inadequate resource.
Multiple selector and the PWM wave generation circuit, multiple input end connect the PWM letters of different duty respectively
Number, output terminal is connected with the power amplifier, for exporting corresponding PWM according to the selection of the control instruction of control module
Signal；It is multiplexed using multiple selector, the dilatation I/O resources of microcontroller greatly reduce cost.
Power amplifier, the pwm signal for being exported to the multiple selector is amplified to be driven with output drive signal
Motor magnet realizes the switch of electromagnet.The switch of electromagnet causes the variation of the magnetic fluid behavior in residing magnetic field space.
In a preferred embodiment, power amplifier is audio-frequency power amplifier, especially preferably D class audio frequency power
Amplifier.Applicant has found that electromagnet generates the electromotive force of larger negative direction in the moment of power-off in actual measurement simultaneously, to prime
Circuit has an impact.In order to overcome the technical problem, a diode of connecting after D class power amplifier output ports, so as to prevent reversely
Impact of the electromotive force to front stage circuits.
In a preferred embodiment, PWM wave generation circuit include multiple 555 timers, each 555 timer by with
It is set to the pwm signal for generating certain duty cycle.Referring to Fig. 3, the principle of solenoid actuated module another embodiment is shown
Block diagram, PWM wave generation circuit are made of four 555 timers, for example timer 1,2,3,4 generates 95%, 80% respectively,
65%, the pwm signal of 50% duty cycle, so as to which multiple selector can select the pwm signal of corresponding duty cycle.
Referring to Fig. 4, the circuit diagram that 555 timers generate PWM wave is shown, wherein, the V0 signals through No. 3 pin output
Duty cycle can be described as：D=RA/(RA+RB)。
In a preferred embodiment, multiple selector selects a selector for four, has four tunnel input signals, defeated all the way
Go out signal and two-way selection control signal.Specifically, when microcontroller selection control bit 00,01,10,11, corresponding selection
Signal be signal that input port is 0,1,2,3.
Using above-mentioned technical proposal, the specific implementation step of single magnet control is：
1) timer 1,2,3,4 generate 95%, 80%, 65% respectively, the PWM wave of 50% duty cycle.Four tunnel duty cycles
PWM wave signal be input to four and select 0,1,2,3 four input port of a selector.
2) two states for selecting position of a selector are selected by microcontroller control four.
3) four two selection position different conditions of a selector is selected to select the PWM wave signals of different duty.Specifically,
00,01,10,11 represents selection output 95%, 80%, 65%, the PWM wave of 50% duty cycle respectively.
4) PWM waves for through in 3) four selector being selected to export are amplified to by D-type audio power amplifier can drive electromagnetism
The degree of iron switch.
Embodiment 1
Referring to Fig. 5, by taking the electromagnet array of nine electromagnet compositions as an example, each electromagnet is with 50% when initial
PWM wave drives.Since the switch time of each electromagnet at this time is the same, so generated suction is the same, in electromagnet square formation
The magnetic fluid of side is located at vessel center, remains static.
If being driven at this time to electromagnet Isosorbide-5-Nitrae, 7 with 65% PWM wave, remaining electromagnet still keeps 50% PWM wave to drive
Dynamic, due to electromagnet Isosorbide-5-Nitrae at this time, the time of the high level of 7 supplies is longer than others, therefore the time of generated attraction is than it
Remaining electromagnet will be grown, so the attraction within this period difference can then make the behavior that magnetic fluid generation slowly moves to left.
If being driven at this time to electromagnet 1,2,3 with 65% PWM wave, remaining electromagnet still keeps 50% PWM wave to drive
Dynamic, due to electromagnet 1 at this time, the time of the high level of 2,3 supplies is longer than others, therefore the time of generated attraction is than it
Remaining electromagnet will be grown, so the attraction within this period difference can then make the behavior that magnetic fluid generation slowly moves forward.
If being driven at this time to electromagnet 3,6,9 with 65% PWM wave, remaining electromagnet still keeps 50% PWM wave to drive
Dynamic, due to electromagnet 3 at this time, the time of the high level of 6,9 supplies is longer than others, therefore the time of generated attraction is than it
Remaining electromagnet will be grown, so the attraction within this period difference can then make the behavior that magnetic fluid generation slowly moves to right.
If being driven at this time to electromagnet 7,8,9 with 65% PWM wave, remaining electromagnet still keeps 50% PWM wave to drive
Dynamic, due to electromagnet 7 at this time, the time of the high level of 8,9 supplies is longer than others, therefore the time of generated attraction is than it
Remaining electromagnet will be grown, so the attraction within this period difference can then make the behavior that magnetic fluid moves after occurring slowly.
If above-described 65%PWM ripples change 80% or 95% PWM wave into, the height of the more PWM wave of high duty ratio is electric
It is longer between usually, therefore magnetic fluid can be caused to occur very fast or quickly move to left, it moves to right, moves forward, move Behavioral change afterwards.Certainly, if
The quantity of electromagnet array is bigger, then the control accuracy that magnetic fluid can reach is higher.
Embodiment 2
Referring to Fig. 6, the functional block diagram of embodiment 2 is shown, the PWM wave of the different duty in embodiment 1 is replaced with
More universal audio signal, so that magnetic fluid product can be according to the dynamic movement of rhythm of music.The audio of input is believed
Number sampled through ADC, by MCU according to the amplitude size conversion of audio signal into different duty PWM wave through I/O port export to
Data selector.MCU generates the selection control bit signal of corresponding data selector by inputting the amplitude size of audio, so as to
The PWM wave of drive electromagnet is selected, controls the speed of the movement of magnetic fluid.Meanwhile MCU is high according to the frequency of input audio signal
It is low, which electro-magnet switch in electromagnet dot matrix is selected, so as to control the direction of the movement of magnetic fluid.That is, audio signal
Amplitude size corresponds to the translational speed of magnetic fluid, the moving direction of the corresponding magnetic fluid of frequency height of audio signal.
As shown in figure 8, by the audio signal of input after ADC is sampled, 4 scopes are divided equally into according to amplitude size,
The amplitude of the audio signal of this four scopes corresponds to 95%, 80%, 65% respectively, the PWM wave of 50% duty cycle namely corresponds to
Magnetic fluid movement it is quick, comparatively fast, slowly with static four translational speeds.Equally, divided in the amplitude to audio signal
While also the size of audio signal frequency is carried out to be divided into 8 frequency ranges, this eight frequency ranges are from big to small successively
The movement in corresponding magnetic fluid 8 directions as shown in Figure 7.The magnet control mode in wherein direction 2, other party is exemplified below
Upward magnet control is similar to realize that magnetic fluid toward the movement such as Fig. 7 directions 2, illustrates that is, MCU leads to Fig. 4 electromagnet square formation
The control bit of data selector is crossed, wherein electromagnet 3 selects to give to drive more than the PWM wave of 50% duty cycle, other electromagnet
Give the PWM wave driving of 50% duty cycle.
Referring to Fig. 9, the FB(flow block) of magnetic current body controlling means of the present invention, step S1 are shown：Multiple electromagnet are set
For electromagnet array；
Step S2：By the state change for controlling each electromagnet electromagnet array is made to generate the space magnetic field changed；
Step S3：The space magnetic field generated using electromagnet array makes the magnetic fluid being arranged in the magnetic field range that phase be presented
The spatial distribution answered.
Above-mentioned technical proposal generates controllable magnetic field space so as to reach control in the magnetic field space using electromagnet array
The purpose of interior magnetic fluid metamorphosis.
In the present invention, by setting driving unit and according to operation program output drive signal with drive electromagnet battle array
Row；Electromagnet array generates different spatial magnetic fields according to the drive signal of variation and then makes magnetic fluid that dynamic sky be presented
Between be distributed.
As preferred technical solution, driving unit passes through the switch of each monomer electromagnet of independent control and its output magnetic
Field intensity makes electromagnet array generate the 3 d-space field changed.In electromagnet array, by controlling different positions in array
The on or off and each electromagnet for putting electromagnet export different magnetic field intensities, can be achieved with the space magnetic field of various states,
And then the dynamic space for making magnetic fluid that various forms be presented is distributed.
The explanation of above example is only intended to help to understand method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Several improvement and modification, these improvement and modification are also fallen into the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (10)
1. a kind of magnetic current member control apparatus, which is characterized in that the device includes at least driving unit and electromagnet array, wherein,
Control module is set in the driving unit, is controlled for generating drive signal according to operation program in the electromagnet array often
The state of a electromagnet；The electromagnet array is made of multiple monomer electromagnet, for making corresponding electromagnetism according to drive signal
Iron state change and then change spatial magnetic field to control magnetic fluid that corresponding spatial distribution is presented.
2. magnetic current member control apparatus according to claim 1, which is characterized in that the driving unit sets multi-channel electromagnet
Drive module is used to drive one or more electromagnet per road solenoid actuated module.
3. magnetic current member control apparatus according to claim 2, which is characterized in that the solenoid actuated module includes at least
PWM wave generation circuit, multiple selector and power amplifier, wherein,
The PWM wave generation circuit, for generating the pwm signal of multiple and different duty cycles；
The multiple selector and the PWM wave generation circuit, multiple input end connect the PWM letters of different duty respectively
Number, output terminal is connected with the power amplifier, for exporting corresponding PWM according to the selection of the control instruction of control module
Signal；
The power amplifier, the pwm signal for being exported to the multiple selector is amplified to be driven with output drive signal
Motor magnet.
4. magnetic current member control apparatus according to claim 3, which is characterized in that the PWM wave generation circuit includes multiple
555 timers, each 555 timer are configured to generate the pwm signal of certain duty cycle.
5. magnetic current member control apparatus according to claim 1 or 2, which is characterized in that the magnetic fluid is arranged on transparent load
In body, which is closely set with the electromagnet array, is arranged on the magnetic fluid in transparent carrier according to electromagnet battle array
It arranges the changes of magnetic field generated and Behavioral change occurs.
6. magnetic current member control apparatus according to claim 1 or 2, which is characterized in that further include input module, the input
Module is connected with the driving unit, is instructed for input control, and the driving unit generates driving according to the control instruction
Signal.
7. magnetic current member control apparatus according to claim 3, which is characterized in that the power amplifier is D class audio frequency work(
Rate amplifier.
8. magnetic current member control apparatus according to claim 7, which is characterized in that the D-type audio power amplifier and electricity
It connects between magnet array a diode.
9. magnetic current member control apparatus according to claim 1 or 2, which is characterized in that the control module uses microcontroller.
10. magnetic current member control apparatus according to claim 1 or 2, which is characterized in that the PWM wave generation circuit integrates
In the control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711326865.7A CN108089495A (en) | 2017-12-13 | 2017-12-13 | A kind of magnetic current member control apparatus |
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| CN201711326865.7A CN108089495A (en) | 2017-12-13 | 2017-12-13 | A kind of magnetic current member control apparatus |
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Cited By (7)
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| CN109217623A (en) * | 2018-09-14 | 2019-01-15 | 广州大学 | A kind of magnetic fluid driver and its driving method |
| CN109343475A (en) * | 2018-09-14 | 2019-02-15 | 广州大学 | A kind of amphibious soft robot and its motion control method based on magnetic fluid |
| CN110888360A (en) * | 2019-11-26 | 2020-03-17 | 天津大学 | Magnetic fluid liquid drop motion control system based on visual servo |
| CN112796251A (en) * | 2020-12-21 | 2021-05-14 | 刘加伦 | Mechanical anti-deviation road isolation pier |
| CN113805506A (en) * | 2021-08-24 | 2021-12-17 | 杭州日光之上科技有限公司 | Magnetofluid music device and control method thereof |
| CN113923563A (en) * | 2021-10-26 | 2022-01-11 | 王枚瑞 | Visualization method and device for enabling magnetic fluid to change along with music |
| CN114983572A (en) * | 2022-05-17 | 2022-09-02 | 北京航空航天大学 | Magnetic pipeline robot driving device |
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| CN113923563A (en) * | 2021-10-26 | 2022-01-11 | 王枚瑞 | Visualization method and device for enabling magnetic fluid to change along with music |
| CN114983572A (en) * | 2022-05-17 | 2022-09-02 | 北京航空航天大学 | Magnetic pipeline robot driving device |
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Application publication date: 20180529 |