CN108189409A - Mating 4D printing techniques magnetic field excitation control system and 4D micro-nano printing devices - Google Patents
Mating 4D printing techniques magnetic field excitation control system and 4D micro-nano printing devices Download PDFInfo
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- CN108189409A CN108189409A CN201810153325.1A CN201810153325A CN108189409A CN 108189409 A CN108189409 A CN 108189409A CN 201810153325 A CN201810153325 A CN 201810153325A CN 108189409 A CN108189409 A CN 108189409A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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Abstract
The present invention discloses a kind of magnetic field excitation control system of mating 4D printing techniques, including：Current signal output device, including：Magnetic field digital signal generation circuit；Each railway digital voltage signal is separately converted to analog signal by DA conversion circuits；Magnetic control coil system, including the first pair of coil axisymmetric along the first direction being oppositely arranged, the second pair of coil axisymmetric in a second direction being oppositely arranged, be oppositely arranged along the axisymmetric third of third direction to coil, public domain is formed between three pairs of coils, each pair of coil configuration is to pass to the electric current of the same direction；Each pair of coil respectively with DA conversion circuit electric property couplings, input wherein analog signal all the way.Magnetic field excitation control system of the present invention only needs to integrate itself and micro-nano printer, real-time collaborative controls two systems to go to realize that printing is synchronous with magnetic control signal, and have the characteristics that quick real-time multimode state switching is controllable, which will can be used in the 4D printings with magnetization heterogeneous character.
Description
Technical field
The present invention relates to 4D to print field, further to a kind of magnetic field excitation control system of mating 4D printing techniques,
It is further directed to a kind of 4D micro-nanos printing device.
Background technology
Under the action of external magnetic field, can be magnetized mixed with magnetic or soft magnetism nano particle mixture, make it is magnetic or
Soft magnetism nano particle generates consistency arrangement.Normally, containing be magnetic or the structure of soft magnetism nano particle have certain special objects
Manage attribute, such as superparamagnetism and photo-thermal effect.During 3D printing, make magnetic or soft magnetism nano particle in light using magnet
Cure after magnetizing in photoresist, each line that 3D structures print is made all to there is the direction of magnetization can design, can be realized to structure
Characteristic heterogeneousization is being considered in some 3D or 4D printing techniques.More and more magnetic ancillary techniques at present, it is desirable to logical
Magnetized particle ordered arrangement in desired structure is crossed, realizes the magnet Meta Materials with specific function, this needs 3D printing
Machine and magnetic field generator are perfectly integrated into synchronization system very much.In addition, the structure particular for micro-nano-scale prints, development
A set of magnetic assists 4D micro-nano printing techniques, has higher application value in extensive special dimension, as with electromagnetic property
Meta Materials, flexible micro-nano robot, magnetic control targeted therapy, biomedical engineering etc..
The existing technological deficiency for realizing the printing of 4D micro-nanos is as follows：
1. realizing the 4D micro-nanos printing of complicated triggering response structure at present, the more material Alternative step printings of generally use are real
The heterogeneous deformation of its existing structure or functional attributes switching, there is presently no a kind of flexibly and effectively homogenous material one-step shapings
Technology of preparing.The multiple heterogeneity for controlling printing complexity 4D micro-nano structures by external field can not be realized.
2. the complex three-dimensional structure for being mingled with magnetic or soft magnetism micro-nano granules is printed, at present additive in print procedure
The method that reason field auxiliary prints heterogeneous Magnetized Material is usually realized using the placement position for changing external permanent magnet, can not be realized
The arbitrary direction of magnetization is with printing switching real-time.The particularly very high micro-nano print procedure requirement external magnetic field of fineness
Pumping signal has the function of controllable, changeable, real-time switching, multimodal switchover etc..
3. there is presently no it is a kind of can be printed with 3D or 4D while further realize that external field control material is heterogeneous
Method, technique and its relevant device.
Invention content
(1) technical problems to be solved
In view of this, it is controlled the purpose of the present invention is to provide a kind of magnetic field excitation control system and comprising the magnetic field excitation
The 4D micro-nano printing devices of system, at least partly to solve the problems, such as techniques discussed above.
(2) technical solution
According to the one side of present example, a kind of magnetic field excitation control system of mating 4D printing techniques is provided, it is special
Sign is to include：Current signal output device, including：
Magnetic field digital signal generation circuit, for generating at least three road railway digital voltage letters according to magnetic field parameter to be adjusted
Number；
Digital voltage signal described in each road is separately converted to analog signal by DA conversion circuits；
Magnetic control coil system, including the first pair of coil axisymmetric along the first direction being oppositely arranged, the edge being oppositely arranged
The axisymmetric second pair of coil of second direction, be oppositely arranged along the axisymmetric third of third direction to coil, three pairs of coils it
Between form a public domain, each pair of coil configuration is to pass to the electric current of the same direction；
Each pair of coil respectively with the DA conversion circuits electric property coupling, input wherein analog signal all the way.
In a further embodiment, three railway digital voltages are generated in magnetic field digital signal generation circuit as follows
Signal：According to five kinds of magnetic field state of a controls：Angle [alpha] is rotated in a first direction, rotates in a second direction angle beta, along third direction
Rotation angle γ, taper magnetic field CONICAL and field strength FIELD determine each road voltage in the following way：
In a further embodiment, magnetic control coil system further includes：First current amplifier, the second current amplifier
With third current amplifier, coil is input to respectively for amplifying with first pair of coil, second pair of coil and third respectively
The analog signal of coil.
In a further embodiment, first direction, second direction and third direction are orthogonal.
In a further embodiment, first pair of coil, second pair of coil and third form three-phase He Muhuo to coil
Hereby coil.
In a further embodiment, the magnetic control coil system further includes Switching Power Supply, for being put for the first electric current
Big device, the second current amplifier and third current amplifier provide power output.
According to another aspect of the present invention, a kind of 4D micro-nanos print system is also provided, including：
The magnetic field excitation control system of any description above；
Sample stage, for loading object to be printed；
Translation stage, the sample stage are installed on translation stage, and the translation stage is configured to sample stage stretching into magnetic control line
The public domain of circle system；
Three-dimensional laser direct writing instrument, for generating the laser for irradiating object to be printed.
In a further embodiment, mould electron camera is further included, for swashing to magnetic field excitation control system, three-dimensional
Light direct writing instrument and translation stage mated condition are imaged.
In a further embodiment, controller is further included, is connect with the current signal output device, for exporting
Control the magnetic field digital signal generation circuit in signal to the current signal output device.
(3) advantageous effect
(1) present invention proposes that a kind of magnetization (distribution, direction etc.) realization using outfield control magnetic particulate inclusion material is beaten
The magnetic heterogeneous method of process material is printed, and gives the magnetic control micro-nano 4D Method of printings based on three-dimensional laser direct writing technology.It
It is the one-step shaping technology for being mingled with printed material based on magnetic or soft magnetic granules, it is magnetic available for any direction in 3D or 4D printings
The realization that heterogeneousization controls in real time.
(2) The present invention gives three axis Helmholtz coils of the magnetic control micro-nano 4D printings for three-dimensional laser direct writing technology
Design and control method.It only needs to integrate its magnetic control system and micro-nano 3D printer, real-time collaborative controls two systems to go to realize
Printing is synchronous with magnetic control signal.The magnetic of magnetic-particle in printed material can be precisely controlled by the electric current for controlling external coil
Change characteristic, have the characteristics that quick real-time multimode state switching is controllable.
(3) The present invention gives magnetic control micro-nano 4D printer Designs scheme and its printing flows of response.Entirety considers
The multi-functional demand of following magnetic control micro-nano 4D printer Designs and redundancy are that a kind of external physical field that passes through controls material-structure
Heterogeneous effective ways can further combine the multiple coupled field such as electricity, heat, light, sound and extend current 3D or 4D printers in more materials
The control method of material printing heterogeneousization.
Description of the drawings
Figure 1A, Figure 1B, Fig. 1 C and Fig. 1 D are the main view of the magnetic control coil system coil part of the embodiment of the present invention respectively
Figure, side view, vertical view and stereogram.
Fig. 2 is the principle schematic of the magnetic field excitation control system of the embodiment of the present invention.
Fig. 3 is the corresponding pictorial diagram of Fig. 2 schematic diagrams.
Fig. 4 A and Fig. 4 B are respectively the sample stage top and bottom perspective views of the embodiment of the present invention.
Fig. 5 is that the sample stage of the embodiment of the present invention loads sample schematic diagram.
Fig. 6 is the sample loading process schematic diagram of the embodiment of the present invention.
Fig. 7 is the three-dimensional laser direct writing instrument of the embodiment of the present invention and translation stage cooperation schematic diagram.
Fig. 8 is the 4D micro-nano print system cooperation schematic diagrams of the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
Hereinafter, it will thus provide embodiment is with the embodiment that the present invention will be described in detail.Advantages of the present invention and effect
It will be by content disclosed in this invention and more notable.Illustrate that appended attached drawing simplified and used as illustrating herein.Attached drawing
Shown in component count, shape and size can modify according to actual conditions, and the configuration of component is likely more complexity.
Also otherwise practice or application can be carried out in the present invention, and without departing from the condition of spirit and scope defined in the present invention
Under, various change and adjustment can be carried out.
Front view, side view, vertical view and the stereogram principle of the magnetic control coil system coiler part of the embodiment of the present invention
For the print area of three-dimensional laser straight-writing system is covered magnetic field；In print procedure, according to design specify arbitrary direct write point or
The magnetic field intensity of line and direction make the magnetic nanoparticle in printed photoresist as print progress is orderly according to program completion
Magnetization.The system needs three-dimensional laser direct writing instrument to coordinate realization in hardware, software and preparation process with magnetic control coil system.Figure
1A, Figure 1B, Fig. 1 C and Fig. 1 D be respectively the front view of the magnetic control coil system coil part of the embodiment of the present invention, side view,
Vertical view and stereogram.
The coil can be realized according to laser direct writing system and application demand by a variety of coils.Such as Figure 1A-Fig. 1 D coil systems
It can include first pair of coil axisymmetric along the first direction for being oppositely arranged, axisymmetric in a second direction the be oppositely arranged
Two pairs of coils, be oppositely arranged along the axisymmetric third of third direction to coil, form a public domain between three pairs of coils, respectively
It is to pass to the electric current of the same direction to coil configuration.To enumerate conveniently, it is only exemplified by a kind of simple three axis Helmholtz coil here
Example.
From coil demand, as shown in Fig. 2, needing to control three-phase Helmholtz coil three phase sine electric current according to rule
Generate controllable rotating magnetic field.The magnetic field that any pair of coil generates is uniform magnetic field axially, by controlling the big of electric current
It is small to control the magnetic field size of each pair of coil.Three pairs of coils are orthogonal, which to be put, can obtain the magnetic field of three-coordinate X-Y-Z axis components (here
X, Y and Z axis correspond to above-described first direction, second direction and third direction respectively), and generate in three pairs of coils
Three pairs of magnetic field superpositions respectively along X-Y-Z axis together, form and close magnetic field, and size and Orientation meets vector correlation.Pass through control
The size of current of three pairs of coils is made, can control along the magnetic-field component on X-Y-Z axis, and then synthesizes the magnetic field of any direction.Most
Eventually, it in order to generate rotating excitation field, can be converted according to following spin matrix, obtain the rotation rotated around any desired direction
The magnetic field following U of required voltage signalsmall_z, Umiddle_y, Ubig_x.Providing for usual voltage signal is accurate and synchronous
, but since the error of coil winding is usually bigger than normal, the adjusting current amplifier after the completion of system is needed to be corrected.Therefore,
From system design view, as long as providing the voltage signal of three-phase synchronous, the later stage again respectively corrects each phase current.
In some embodiments, three axis Helmholtz coils can be optimized.The design of Helmholtz coil is abided by
It follows surrounding hole and can be inserted into minimum objective lens (24mm diameters).It is subject to the top holes of 25mm diameters, design principle is every
Maximum current to coil is that 5A corresponds to hub of a spool 20mT magnetic field intensities, it is contemplated that enamel-cover number of wire turns, coil-span and outer
The design parameters such as shell size.
To realize the coil control of magnetic control system, magnetic field excitation control system it is also required to provide three-phase alternating current.Its is whole
Body hardware, which is built, can include microscope, electron camera, computer, controller, digital-to-analogue conversion card, current amplifier, switch electricity
Source and coil etc., as shown in Figures 2 and 3.
The output of three-phase current signal can be generated by current signal output device (such as PC machine or embedded slave computer).It carries
The digital signal of confession is voltage signal, and the generation of analog voltage signal, mould are realized via DA conversion circuits (such as DA conversions card)
Intend voltage signal by control electric current of the current amplifier output for three-phase coil.
The problem of wherein key problem is the signal period, i.e. PWM clock timers problem.Briefly, the rotation of generation
The speed F (one second turn the number of turns) in magnetic field corresponding to a circle need how long (1/F seconds).For the approximation circle in formation
It is rotated on circle, more just can guarantee that the signal number M needed for a circle will be enough completely rotates a circle.If therefore M=256, rotation
When turning frequency up to maximum F=200Hz, the signal provided must satisfy more than or equal to 256 × 200=51200=51.2 (k/
S) (this should be less than being equal to 1/ (F × M)=19.53 corresponding to the precision of clock timing triggering mode Timer PWM triggerings speed
Micron).What is be considered above is that the number of each circle triggering is identical, i.e. M is constant set-point (general 256), but use clock
Timing triggering mode is triggered every 1/ (F × M) timing, as F=1Hz, F × M signal is needed to form a circle rotation, and is believed
Number output always be maximum value.And with the mode of PWM, often circle only forms a circle to constant M=256 trigger signal and rotates, signal
The growth of output is related with speed.Therefore, optimizing angle from control, the mode of PWM is better than clock timing Timer modes,
And two kinds of PWM and PCTimer triggering modes also correspond respectively to slave computer embedded signal and PC machine signal producing method not
Together.
The generation of three-phase current/voltage signal, corresponding to five kinds of manipulation states：YAW (α), PITCH (β), ROTATION
(γ), CONICAL (θ), FIELD (B), and the relationship between them meets the spin matrix variation of following spin matrix and voltage
Relationship (can derive).
The rotation control current definition of three Helmholtz coils is：
Here, Usmall_Z, UMiddle_Y, UBig_XFor real-time voltage output valve； For most
Big voltage setting value；Angular velocity omega, i.e. ω t=γ；τ is phase angle.
As shown in figure 8, the embodiment of the present invention also provides a kind of 4D micro-nanos print system, including：
Magnetic field excitation control system 1 described in above example；Sample stage, for loading object to be printed；Translation stage 2, institute
It states sample stage to be installed on translation stage, the translation stage is configured to stretch into sample stage the public domain of magnetic control coil system；
Three-dimensional laser direct writing instrument 3, for generating the laser for irradiating object to be printed.
In some instances, the synthesis and operating process of three-dimensional laser straight-writing system and magnetic control system can be as follows：
First, design sample platform.Sample stage is the glass slide device of fixed sample, and size is 40mm × 40mm × 2.0mm.
The size of general specimen slide is 22mm × 22mm × 0.17mm, thus the fluting designed here for 22.5mm × 22.5mm ×
0.20mm。
Again, as shown in Figure 4 A and 4 B shown in FIG., after photoresist being dropped in clean slide center, face-up it is placed on sample stage
Fluting on.Glass slide quadrangle is being dropped in quick-drying gelatin, as shown in Figure 5.It drips and beats at the glass slide back side again after drying is fixed
Stamp-pad ink, loading process are as shown in Figure 6.
Finally, after the completion of sample stage is loaded, need sample stage being put into the translation stage of three-dimensional laser direct write (A in Fig. 7
And B), then laser objective is transmitted under sample stage, and gradually find the printed substrates upper surface (C and D in Fig. 7) of glass slide.
Particular embodiments described above has carried out the purpose of the present invention, technical solution and advantageous effect further in detail
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the present invention
Within the scope of.
Claims (9)
1. a kind of magnetic field excitation control system of mating 4D printing techniques, it is characterised in that including：Current signal output device, packet
It includes：
Magnetic field digital signal generation circuit, for generating at least three road railway digital voltage signals according to magnetic field parameter to be adjusted；
Digital voltage signal described in each road is separately converted to analog signal by DA conversion circuits；
Magnetic control coil system, including the first pair of coil axisymmetric along the first direction being oppositely arranged, be oppositely arranged along second
The axisymmetric second pair of coil in direction, be oppositely arranged along the axisymmetric third of third direction to coil, shape between three pairs of coils
Into a public domain, each pair of coil configuration is to pass to the electric current of the same direction；
Each pair of coil respectively with the DA conversion circuits electric property coupling, input wherein analog signal all the way.
2. magnetic field excitation control system according to claim 1, which is characterized in that the magnetic field digital signal generation circuit
In generate three railway digital voltage signals as follows：
According to five kinds of magnetic field state of a controls：Angle [alpha] is rotated in a first direction, rotates in a second direction angle beta, is revolved along third direction
Gyration γ, taper magnetic field CONICAL and field strength FIELD determine each road voltage in the following way：
3. magnetic field excitation control system according to claim 1, which is characterized in that the magnetic control coil system further includes：
First current amplifier, the second current amplifier and third current amplifier, respectively with first pair of coil, second pair
Coil and third are to coil, for amplifying the analog signal for being input to each coil.
4. magnetic field excitation control system according to claim 1, which is characterized in that wherein, the first direction, second party
To orthogonal with third direction.
5. magnetic field excitation control system according to claim 1, which is characterized in that first pair of coil, second pair of line
Circle and third form three-phase helmholtz coil to coil.
6. magnetic field excitation control system according to claim 3, which is characterized in that the magnetic control coil system further includes out
Powered-down source, for providing power output for the first current amplifier, the second current amplifier and third current amplifier.
7. a kind of 4D micro-nanos print system, it is characterised in that including：
Any magnetic field excitation control systems of claim 1-6；
Sample stage, for loading object to be printed；
Translation stage, the sample stage are installed on translation stage, and the translation stage is configured to sample stage stretching into magnetic control coil array
The public domain of system；
Three-dimensional laser direct writing instrument, for generating the laser for irradiating object to be printed.
8. 4D micro-nanos print system according to claim 7, which is characterized in that further include mould electron camera, for pair
Magnetic field excitation control system, three-dimensional laser direct writing instrument and translation stage mated condition are imaged.
9. 4D micro-nanos system according to claim 7, which is characterized in that controller is further included, it is defeated with the current signal
Go out device connection, for outputing control signals to the magnetic field digital signal generation circuit in the current signal output device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110938541A (en) * | 2019-11-14 | 2020-03-31 | 杭州电子科技大学 | Controllable uniform magnetic field generating device for small biological experiment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938541A (en) * | 2019-11-14 | 2020-03-31 | 杭州电子科技大学 | Controllable uniform magnetic field generating device for small biological experiment |
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