CN111952697B - Shape memory alloy-based device and method for regulating electromagnetic induction transparent spectral line - Google Patents
Shape memory alloy-based device and method for regulating electromagnetic induction transparent spectral line Download PDFInfo
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- CN111952697B CN111952697B CN202010719911.5A CN202010719911A CN111952697B CN 111952697 B CN111952697 B CN 111952697B CN 202010719911 A CN202010719911 A CN 202010719911A CN 111952697 B CN111952697 B CN 111952697B
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Abstract
The invention relates to a device for regulating and controlling a quasi-electromagnetic induction transparent spectral line based on a super surface of a shape memory alloy and a manufacturing method thereof. The inner frame of the device is made of shape memory alloy materials, the shape of the inner frame can be reversibly changed under the high and low temperature states by utilizing the characteristic that the shape memory alloy can realize the two-way memory effect through artificial training, the resonant frequency and the strength of the structure are controlled, the coupling frequency between the inner frame and the copper frame is further regulated and controlled, and the accurate modulation of the electromagnetic induction transparent effect is realized.
Description
Technical Field
The invention belongs to a super-surface device for rapidly modulating microwave transmission spectral lines by utilizing environmental temperature change, relates to a device for regulating electromagnetic induction transparent spectral lines based on a shape memory alloy super-surface and a manufacturing method thereof, and particularly relates to a method for realizing high-efficiency regulation of electromagnetic induction transparent spectral lines and realizing microwave logic gate action by a super-surface structure based on a two-way memory effect obtained by training of a shape memory alloy.
Background
The microwave modulator based on temperature is a device which utilizes a material with adjustable parameters along with temperature or a temperature sensitive electronic component to regulate and control the amplitude or the phase of a microwave signal, and has wide application prospect in the fields of temperature sensing, electromagnetic filtering, signal modulation and the like. The existing temperature-related microwave modulation devices generally have the defects of complex devices, high cost, poor design flexibility and the like, and in addition, the traditional devices are limited by the performance limit of materials, so that the devices have low efficiency, high loss, large volume and heavy mass, and cannot meet the requirements of the modern electromagnetic technology on device integration and miniaturization. The novel electromagnetic modulation device represented by the super surface can utilize the plane structure unit with the sub-wavelength size to realize the efficient regulation and control of electromagnetic waves, and meanwhile, the defects of the traditional electromagnetic modulation device can be effectively overcome, so that the novel electromagnetic modulation device attracts the wide attention of researchers. In combination with different methods for researchers to realize active regulation and control of the electromagnetic induction transparent effect through the super surface in recent years, a new idea is provided for realizing efficient modulation of electromagnetic waves.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides an electromagnetic induction transparent spectral line device based on shape memory alloy super-surface regulation and control and a manufacturing method thereof, and solves the problems of complexity, high cost, poor design flexibility and the like of the traditional microwave modulation device.
Technical scheme
A device for regulating electromagnetic induction transparent spectral lines based on a shape memory alloy super surface is characterized by comprising a copper film outer frame 1 and a shape memory alloy inner frame 2; the shape memory alloy inner frame is positioned in the copper film outer frame, and the shape of the shape memory alloy is as follows: the T-shaped structure is reversely inserted into the structure with the gap; introducing a bright unit resonance by the copper film outer frame, exciting a dark unit resonance of the shape memory alloy structure under different temperature states, and realizing an electromagnetic-like induced transparent effect in a waveguide environment; the T-shaped structure of the shape memory alloy structure realizes reversible transformation at an angle of 0-omega.
The copper film outer frame 1 and the shape memory alloy 2 are bonded on the Teflon substrate 3 together.
The thickness of the copper film outer frame 1 is 0.035 mm.
The thickness of the shape memory alloy inner frame 2 is 0.3 mm.
The side length L of the copper film outer frame 1 is 17mm, and the width W of each side is 1 mm.
The two widths of the T-shaped structure of the shape memory alloy 2 are w2＝1mm，w30.8mm, length l2＝9mm，h25 mm; the width of the structure with the gap is w10.5mm, and a non-notched edge of l114mm, two sides are h13mm, each side of the gap is l3＝6.3mm。
A manufacturing method of the electromagnetic induction transparent spectral line device based on shape memory alloy super-surface regulation is characterized by comprising the following steps:
step 1: printing a copper film on the Teflon substrate by a printed circuit board technology; cutting and processing a T-shaped structure by adopting a metal wire to be inversely inserted into a rectangular shape memory alloy shape with a notch;
step 2: cooling the memory alloy structure to the martensite finish temperature, MfUnder 20 ℃;
and step 3: loading stress in a martensite phase state to enable a T-shaped structure in the shape memory alloy structure to rotate upwards to an angle omega;
and 4, step 4: heating the structural unit in the loaded state to the austenite transformation end temperature AfCooling to a temperature of 35 ℃ or higher below the martensite finish temperature;
and 5: repeating the steps 2-3 for more than 10 times to enable the T-shaped shape in the shape memory alloy structure to have a two-way memory effect;
step 6: the memory alloy structure is bonded inside the copper film frame of the Teflon substrate.
Advantageous effects
The invention provides a device for regulating electromagnetic induction-like transparent spectral lines based on a super surface of a shape memory alloy and a manufacturing method thereof. The inner frame of the device is made of shape memory alloy materials, the shape of the inner frame can be reversibly changed under the high and low temperature states by utilizing the characteristic that the shape memory alloy can realize the two-way memory effect through artificial training, the resonant frequency and the strength of the structure are controlled, the coupling frequency between the inner frame and the copper frame is further regulated and controlled, and the accurate modulation of the electromagnetic induction transparent effect is realized.
The invention solves the problems of complex device, high cost, poor design flexibility and the like of the traditional microwave modulation device, and discloses a design idea and an implementation method of electromagnetic induction transparent effect spectral lines based on a super surface of a shape memory alloy and combined with environmental temperature change control. The trained shape memory alloy structure is used for regulating and controlling the resonance mode of the dark unit, so that the coupling frequency between the light unit mode and the dark unit mode is obviously changed, the electromagnetic-like induced transparent effect can be dynamically regulated, and the efficient regulation and control of the microwave transmission frequency spectrum are finally realized. The shape memory alloy structure is trained to have a two-way memory effect, and the shape of the shape memory alloy structure can be changed through the change of the ambient temperature, so that the frequency of a dark unit is changed, the dark unit can be reversely converted between two different frequencies, and the coupling frequency and the intensity between a light mode and a dark mode are influenced. When the shape memory alloy is in a low-temperature martensite phase state, the resonance frequency of the dark unit is at a lower frequency and is in a resonance mode working interval of the bright unit, and at the moment, the dark mode resonance unit can be excited, and a transmission peak is generated at the lower frequency, and simultaneously, a transmission valley is generated at a higher frequency due to interference cancellation; when the temperature rises to be higher than the austenite finishing temperature of the shape memory alloy, the shape memory alloy is in a high-temperature austenite phase state, the resonance frequency of the dark unit is at a higher frequency and still in a working interval of a resonance mode of the bright unit, and a transmission peak is generated at a transmission valley frequency in a low-temperature martensite state just under the excitation of the resonance mode of the bright unit, so that the effect of a logic gate is realized. Interference occurs between the two resonance modes through the near-field coupling effect, the electromagnetic-like induced transparent effect is induced to occur, the near-field coupling between the bright and dark units is accurately controlled through temperature adjustment, and the efficient modulation of electromagnetic wave signals is realized.
The invention has the following effects and advantages:
1. the electromagnetic induction transparent effect is realized based on the coupling behavior of the bright and dark resonance mode, and the characteristic that the shape memory alloy can obtain the two-way memory effect through training is utilized, so that the structure is controlled to generate specific deformation, the coupling frequency of the bright and dark units is controlled, and the efficient modulation of electromagnetic waves is realized.
2. The modulation method adopted by the invention can quickly respond between high and low temperatures and has high stability.
3. The invention adopts a mature printed circuit board and a metal wire cutting process to prepare the sample, and has the advantages of controllable cost and simple processing.
Drawings
FIG. 1 is a schematic structural diagram of a method for controlling electromagnetic induction transparency effect based on the surface temperature of a shape memory alloy;
FIG. 2 is a diagram of an embodiment of the present invention based on the method of controlling the temperature of the super-surface of the shape memory alloy based on electromagnetic induction transparency effect;
FIG. 3 is a graph of the effects of the present invention on shape memory alloy training;
FIG. 4 is a graph of simulated and experimental transmission curves of the copper film frame unit and the shape memory alloy structural unit at different temperatures according to the present invention;
FIG. 5 is a transmission curve of simulation and experiment at different temperatures for the method of the present invention based on the shape memory alloy super surface temperature regulation type electromagnetic induction transparency effect;
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
the specific structure of the invention is realized as the attached figure 1: the structure comprises a copper film outer frame and a shape memory alloy inner frame, wherein a T-shaped structure in the middle of the shape memory alloy inner frame can realize reversible transformation at 0-20 degrees through training, an incident electric field is along the vertical direction, and the whole structure is arranged in a waveguide. The unit structure of the shape memory alloy is changed through temperature adjustment, and then near-field coupling between the bright unit and the dark unit is changed, so that the purpose of remarkably adjusting microwave transmission spectral lines is achieved.
The embodiments are described with reference to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5.
The embodiment of the invention discloses a method for realizing efficient temperature regulation type electromagnetic induction transparent spectral lines based on a shape memory alloy super surface, and designs a case for realizing efficient microwave modulation by regulating type electromagnetic induction transparent effect spectral lines based on the method, wherein the specific structure is shown in an attached drawing 1. The case structure is composed of an inner metal frame and an outer metal frame, wherein the outer frame is a copper film with the thickness of 0.035mm, and the specific parameters are as follows: l equals 17mm, and W equals 1mm, prints to 1 millimeter thick teflon base plate through printed circuit board technique on, the inside casing is the memory alloy structure of 0.3mm thick, and specific parameter is: l1＝14mm，w1＝0.5mm，h1＝3mm，l2＝9mm，w2＝1mm，h2＝5mm，l3＝6.3mm，w3＝0.8mm。
Made by a metal wire cutting technology, and then trains the middle T-shaped structure:
(1) first, the memory alloy structure is cooled to the martensite finish temperature (M)f20 ℃ or lower;
(2) loading stress in the martensite phase causes the T-shape in the shape memory alloy structure to rotate upward to 20 degrees, as shown in FIG. 3;
(3) heating the structural unit in the loaded state to the austenite transformation end temperature (A)f35 ℃) or higher, and cooling to a temperature below the martensite finish temperature;
(4) repeating the steps (2) and (3) for more than 10 times to enable the memory alloy structure to have a two-way memory effect, and then adhering the memory alloy structure on the Teflon substrate, wherein the distance D between the memory alloy structure and the top of the copper film frame is 2.5 mm. The structure of the shape memory alloy is adjusted by using the temperature, so that the resonance frequency and the resonance strength of the dark mode magnetic resonance are influenced, and the dynamic high-efficiency modulation of the electromagnetic-induction-like transparent effect is realized.
The inventive case was tested in a waveguide environment with transmittance curves as shown in FIGS. 4 and 5; at low temperature (15 deg.C), the shape memory alloy is in martensite phase, the T is 0 deg., the resonance frequency of the dark unit is 4.73GHz, the working state of the device is that the transmission peak is generated at 4.6GHz, and the transmission valley is generated at 5.17GHz due to interference cancellation; and at a high temperature (40 ℃), the shape memory alloy is in a martensite phase state, the T is 20 degrees, the resonance frequency of the dark unit is at 5.16GHz, and the working state of the device shows that a transmission peak is generated at 5.17 GHz. Corresponding to the transmission valley in the low temperature martensite state, thereby realizing the function of the logic gate. The metal structure related by the invention is simple, the processing and the manufacturing are easy, and different shapes can be trained to efficiently modulate electromagnetic waves with different frequency bands in the design and preparation process.
Claims (5)
1. A device for regulating electromagnetic induction transparent spectral lines based on a shape memory alloy super surface is characterized by comprising a copper film outer frame (1) and a shape memory alloy inner frame (2); the shape memory alloy inner frame is positioned in the copper film outer frame, and the shape of the shape memory alloy is as follows: the T-shaped structure is reversely inserted into the structure with the gap; introducing a bright unit resonance by the copper film outer frame, exciting a dark unit resonance of the shape memory alloy structure under different temperature states, and realizing an electromagnetic-like induced transparent effect in a waveguide environment; the T-shaped structure of the shape memory alloy structure realizes reversible transformation at an angle of 0-omega;
the copper film outer frame (1) and the shape memory alloy inner frame (2) are bonded on the Teflon substrate (3) together;
the manufacturing method of the transparent spectral line device comprises the following steps:
step 1: printing a copper film on the Teflon substrate by a printed circuit board technology; cutting and processing a T-shaped structure by adopting a metal wire to be inversely inserted into a rectangular shape memory alloy shape with a notch;
step 2: cooling the memory alloy structure to the martensite finish temperature, MfUnder 20 ℃;
and step 3: loading stress in a martensite phase state to enable a T-shaped structure in the shape memory alloy structure to rotate upwards to an angle omega;
and 4, step 4: heating under loaded conditionStructural unit to austenite transformation end temperature, namely AfCooling to below the martensite finish temperature when the temperature is higher than 35 ℃;
and 5: repeating the steps 2-3 for more than 10 times to enable the T-shaped shape in the shape memory alloy structure to have a two-way memory effect;
step 6: the memory alloy structure is bonded inside the copper film frame of the Teflon substrate.
2. The electromagnetic induction transparent spectral line device based on shape memory alloy super surface conditioning class of claim 1, characterized in that: the thickness of the copper film outer frame (1) is 0.035 mm.
3. The electromagnetic induction transparent spectral line device based on shape memory alloy super surface conditioning class of claim 1, characterized in that: the thickness of the shape memory alloy inner frame (2) is 0.3 mm.
4. The electromagnetic induction transparent spectral line device based on shape memory alloy super surface conditioning class according to claim 1 or 3, characterized in that: the side length L of the copper film outer frame (1) is 17mm, and the width W of each side is 1 mm.
5. The electromagnetic induction transparent spectral line device based on shape memory alloy super surface conditioning class according to claim 1 or 4, characterized in that: the two widths of the T-shaped structure of the shape memory alloy inner frame (2) are w2＝1mm，w30.8mm, length l2＝9mm，h25 mm; the width of the structure with the gap is w10.5mm, and a non-notched edge of l114mm, two sides are h13mm, each side of the gap is l3＝6.3mm。
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| "Experimental realization of a switchable filter based on a dynamically transformable array";Xin Chen等;《CHINESE OPTICS LETTERS》;20180810;第1-3页 * |
| "基于电磁超介质太赫兹波传输动态可调的研究";张俊楠;《中国优秀硕士学位论文全文数据库》;20150915;正文第24页 * |
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