CN104259080A - Artificial cycle structure based ultrasonic wave filtering system and method - Google Patents
Artificial cycle structure based ultrasonic wave filtering system and method Download PDFInfo
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- CN104259080A CN104259080A CN201410539417.5A CN201410539417A CN104259080A CN 104259080 A CN104259080 A CN 104259080A CN 201410539417 A CN201410539417 A CN 201410539417A CN 104259080 A CN104259080 A CN 104259080A
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Abstract
An artificial cycle structure based ultrasonic wave filtering system comprises an ultrasonic wave transmitting device, an artificial cycle structure and a temperature control device; the ultrasonic wave transmitting device is used for transmitting ultrasonic waves to be filtered; the artificial cycle structure is used for regulating and controlling the incident ultrasonic waves to be filtered and generating lamb waves in a substrate of the artificial cycle structure; the lamb waves are inspired by the artificial cycle structure to generate a transmission enhancement peak; the temperature control device is used for regulating and controlling the working temperature of the artificial cycle structure to be higher than or lower than the phase change temperature of the artificial cycle structure; the artificial cycle structure is also used for regulating and controlling the frequency corresponding to the transmission enhancement peak according to the working temperature and transmitting out filtered ultrasonic waves. According to the artificial cycle structure based ultrasonic wave filtering system, the ultrasonic waves corresponding to the working temperature can be conveniently and effectively filtered out through simple control. In addition, the invention also provides an artificial cycle structure based ultrasonic wave filtering method.
Description
Technical field
The present invention relates to ultrasonic technology field, particularly relate to a kind of based on the hyperacoustic system and method for artificial cycle structured filter.
Background technology
Current acoustic wave filter comprises SAW filter, is all to realize filtration to sound wave to the conversion of the signal of telecommunication by ultrasonic transducer based on electronic circuit.The ultrasonic wave that ultrasonic transducer sends has certain frequency scope, and most of energy of signal is included in one section of narrower frequency band (effective bandwidth) of frequency.But by ultrasonic applications when sewage disposal, Polymer Synthesizing and sonar etc., often need to use narrow the frequency even ultrasonic wave of single-frequency just can reach the object accurately controlling and detect.Sometimes even also need to take temperature and single-frequency ultrasonic wave to carry out acting in conjunction, such as, in sewage disposal and chemical synthesis, need the Catalyzed by Ultrasonic Wave using certain frequency at a certain temperature; In sonar work, need to determine the depth of water and surrounding environment according to water temperature change by the ultrasonic wave of CF.
Artificial cycle structure is utilized to carry out ultrasonic wave filtering the ultrasonic wave that can obtain some CF.This be due to elastic wave propagate in the artificial cycle structure (phonon crystal) time, be subject to the impact of artificial cycle structure, be prevented from certain frequency scope (band gap) propagate, and other frequency ranges (passband) can be lossless propagate.Therefore, this forbidden band character is utilized can to obtain the ultrasonic wave of some CF.
But how to utilize artificial cycle structure to get final product the convenient ultrasonic wave effectively filtering out the CF corresponding with its operating temperature by the simple mode controlled, a current or technical barrier.
Summary of the invention
Based on this, be necessary for above-mentioned technical problem, provide a kind of control simple and convenient effectively filter out corresponding with operating temperature hyperacoustic based on the hyperacoustic system and method for artificial cycle structured filter.
It is a kind of that based on the hyperacoustic system of artificial cycle structured filter, described system comprises: ultrasonic transmission device, artificial cycle structure and temperature control equipment, wherein:
Described ultrasonic transmission device, for launching ultrasonic wave to be filtered;
Described artificial cycle structure, for regulating and controlling the ultrasonic wave described to be filtered of incidence, and produces Lamb wave in the substrate of described artificial cycle structure, and described artificial cycle structure excites described Lamb wave to produce transmission enhancing peak;
Described temperature control equipment, for regulating and controlling the phase transition temperature of operating temperature higher or lower than described artificial cycle structure of described artificial cycle structure;
Described artificial cycle structure, also strengthens frequency corresponding to peak for regulating and controlling described transmission according to described operating temperature, and is gone out by the transmission ultrasonic wave after filtering.
A kind of based on the hyperacoustic method of artificial cycle structured filter, described method comprises:
Ultrasonic transmission device launches ultrasonic wave to be filtered;
The described to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls, and produces Lamb wave in the substrate of artificial cycle structure, and described artificial cycle structure excites described Lamb wave to produce transmission enhancing peak;
Temperature control equipment regulates and controls the phase transition temperature of operating temperature higher or lower than described artificial cycle structure of described artificial cycle structure;
According to described operating temperature, transmission described in described artificial cycle structure regulating strengthens frequency corresponding to peak, and is gone out by the transmission ultrasonic wave after filtering.
Above-mentioned based on the hyperacoustic system and method for artificial cycle structured filter, the to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls, and produces Lamb wave in the substrate of artificial cycle structure, and artificial cycle structure excites Lamb wave to produce transmission enhancing peak.Because temperature control equipment regulates and controls the phase transition temperature of operating temperature higher or lower than artificial cycle structure of artificial cycle structure, according to this operating temperature, the transmission of artificial cycle structure regulating strengthens frequency corresponding to peak, and is gone out by the transmission ultrasonic wave after filtering.Conveniently the ultrasonic wave corresponding with operating temperature can have effectively been filtered out thus by simple control.
Accompanying drawing explanation
Fig. 1 is based on the hyperacoustic system architecture schematic diagram of artificial cycle structured filter in an embodiment;
Fig. 2-1 is the measurement result figure of artificial cycle structure transmission spectrum when operating temperature 30 DEG C in an embodiment;
Fig. 2-2 is the measurement result figure of artificial cycle structure transmission spectrum when operating temperature 40 DEG C in an embodiment;
Fig. 3 is the schematic diagram of artificial cycle structure in an embodiment;
Fig. 4 is the structural representation based on the hyperacoustic system of artificial cycle structured filter in another embodiment;
Fig. 5 is the flow chart based on the hyperacoustic method of artificial cycle structured filter in an embodiment;
Fig. 6 is the flow chart obtaining the transmission spectrum corresponding with operating temperature in an embodiment.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In one embodiment, as shown in Figure 1, provide one based on the hyperacoustic system of artificial cycle structured filter, this system comprises: ultrasonic transmission device 102, artificial cycle structure 104 and temperature control equipment 106, wherein:
Ultrasonic transmission device 102, for launching ultrasonic wave to be filtered.
Ultrasonic wave to be filtered can be the ultrasonic wave within the scope of optional frequency.Ultrasonic transmission device 102 can be launch the hyperacoustic device of any product control scope.In a preferred embodiment, ultrasonic transmission device 102 comprises sender unit and ultrasonic wave generating apparatus, wherein: sender unit, for launching pumping signal; Ultrasonic wave generating apparatus, for producing ultrasonic wave according to pumping signal.The impulse ejection receiver that sender unit preferred computer controls, the preferred ultrasonic transducer of ultrasonic wave generating apparatus.Pumping signal can be continuation sinusoidal, also can be pulsed sinusoidal signal.Ultrasonic transducer can be any one in single array element ultrasonic transducer, phase array transducer, linear array ultrasonic transducer, convex battle array ultrasonic transducer and interdigital transducer.Preferably, pumping signal is pulsed sinusoidal signal, and ultrasonic transducer adopts single array element ultrasonic transducer.Such as, computer control impulse ejection receiver produce power is 12.5 μ J, frequency is the pulse signal of 100MHz, and be subject to the excitation of this pulse signal, ultrasonic transducer produces 1.5MHz ~ 4.5MHz wideband ultrasonic wave to be filtered, its centre frequency is 3.5MHz, and focal length is 400mm.
Artificial cycle structure 104, for regulating and controlling the ultrasonic wave to be filtered of incidence, and produces Lamb wave in the substrate of artificial cycle structure, and artificial cycle structure excites Lamb wave to produce transmission enhancing peak.
Artificial cycle structure and photonic crystal structure, it is made material and includes but not limited to barium strontium titanate (Ba
xsr
1-xtiO
3) ferroelectric ceramic material, concrete, strontium barium element can be adopted than (the Ba for 3:7
0.7sr
0.3tiO
3), (Ba of 2:8
0.8sr
0.2tiO
3), (Ba of 3.5:6.5
0.65sr
0.35tiO
3), (Ba of 4:6
0.6sr
0.4tiO
3) or other ferroelectric ceramic materials make.Barium strontium titanate (Ba
xsr
1-xtiO
3) ratio of barium element can change arbitrarily between (0 ~ 1) in ferroelectric ceramic material, corresponding operating temperature range can be (-241 DEG C ~ 130 DEG C).In the present embodiment, preferred strontium barium element is than (the Ba for 3:7
0.7sr
0.3tiO
3).
Artificial cycle structure is fixed by sample stage, and concrete artificial cycle structure can being placed in the middle of sample stage is fixed.Corresponding hyperacoustic frequency range to be filtered, adopts the artificial cycle structure of different parameters to regulate and control.The substrate vibration of ultrasonic exciting artificial cycle structure to be filtered, produces Lamb wave in the substrate of artificial cycle structure.Artificial cycle structure excites Lamb wave to produce multiple transmission enhancing peak with zeroth order antisymmetric mode.Transmission strengthens frequency corresponding to peak, is closely related with the parameter of artificial cycle structure.After the parameter of artificial cycle structure is determined, namely the multiple specific frequency that transmission strengthens peak corresponding is determined thereupon.Acoustic propagation performance due to Barium Strontium Titanate Ferroelectric Ceramics also can be subject to the impact of operating temperature, and now hyperacoustic frequency of going out of artificial cycle structured filter is only relevant with operating temperature.
Be described for the wideband of 1.5MHz ~ 4.5MHz ultrasonic wave to be filtered, it is 0.5mm that artificial cycle structure adopts parameter to be substrate thickness, Cycle Length is 1mm, raised line cross sectional shape is rectangle, the width of raised line sectional area is 0.6mm, and the height of raised line sectional area is the fence structure of 0.3mm.As shown in Fig. 2-1, the operating temperature of artificial cycle structure is 30 DEG C, and after the filtration of artificial cycle structure, the ultrasonic frequency that transmission is gone out is 2.844MHz, 3.433MHz, 3.583MHz, 4.277MHz and 4.455MHz.As shown in Fig. 2-2, the operating temperature of artificial cycle structure is 40 DEG C, and after the filtration of artificial cycle structure, the ultrasonic frequency that transmission is gone out is 3.137MHz, 3.752MHz and 3.920MHz.Can obviously find out in above-mentioned figure, after the parameter of artificial cycle structure is determined, the operating temperature of artificial cycle structure changes, and the hyperacoustic frequency after filtration changes along with the change of operating temperature.
Temperature control equipment 106, for regulating and controlling the phase transition temperature of operating temperature higher or lower than artificial cycle structure of artificial cycle structure.
Because Barium Strontium Titanate Ferroelectric Ceramics has the acoustical behavior extremely responsive to temperature, therefore, before and after phase transition temperature, its elastic modelling quantity and the hyperacoustic velocity of wave propagated wherein have larger change.What temperature control equipment 106 was concrete can adopt digital display thermostat water bath, for regulating and controlling the phase transition temperature of operating temperature higher or lower than Barium Strontium Titanate Ferroelectric Ceramics of artificial cycle.With barium strontium titanate (Ba
0.7sr
0.3tiO
3) ferroelectric ceramic material is example, its phase transition temperature is 30 DEG C, the operating temperature of digital display thermostat water bath regulation and control artificial cycle higher or lower than 30 DEG C, the intensification that concrete can be between 10 DEG C ~ 50 DEG C or cooling.
Artificial cycle structure 104, also for strengthening frequency corresponding to peak according to operating temperature regulation and control transmission, and goes out the transmission ultrasonic wave after filtering.
After the parameter of artificial cycle structure determines, hyperacoustic frequency that artificial cycle structured filter goes out is only relevant with temperature.According to operating temperature, the transmission of artificial cycle structure regulating strengthens the frequency at peak, is gone out by the transmission ultrasonic wave after filtering, obtains the ultrasonic wave after the filtration corresponding with operating temperature.
In the present embodiment, the to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls, and produces Lamb wave in the substrate of artificial cycle structure, and artificial cycle structure excites Lamb wave to produce transmission enhancing peak.Because temperature control equipment regulates and controls the phase transition temperature of operating temperature higher or lower than artificial cycle structure of artificial cycle structure, according to this operating temperature, the transmission of artificial cycle structure regulating strengthens frequency corresponding to peak, and is gone out by the transmission ultrasonic wave after filtering.Conveniently the ultrasonic wave corresponding with operating temperature can have effectively been filtered out thus by simple control.
In one embodiment, artificial cycle structure comprises substrate and multiple raised line, and multiple tab parallel is arranged on substrate and spacing distance is equal.In a preferred embodiment, the parameter of artificial cycle structure comprises at least one in substrate thickness, Cycle Length, raised line cross sectional shape and raised line sectional area.Artificial cycle structure comprises the artificial cycle structure of different parameters, and the corresponding hyperacoustic frequency range to be filtered of artificial cycle structure of different parameters, modulates hyperacoustic frequency range to be filtered.Raised line cross sectional shape can be rectangle, polygon or semicircle.For raised line cross sectional shape for rectangle, the schematic diagram of artificial cycle structure as shown in Figure 3.Wherein, the spacing d between the longitudinal center line of raised line is the Cycle Length of artificial periodic structure, and h2 is substrate thickness, and h1 is the height of cuboid, and w is the wide of cuboid, and h1*w is the sectional area of cuboid and the sectional area of raised line.The height of substrate thickness, cuboid can be identical with the wide three of cuboid.At thickness be h1+h2 copper coin on by scribing machine processing, can to obtain Cycle Length be d, the height of cuboid is h1, and width is the artificial cycle structure of the fence structure of w.
In one embodiment, as shown in Figure 4, ultrasonic probe, ultrasonic receiver 108 is also comprised based on the hyperacoustic system of artificial cycle structured filter, the pumping signal needed for ultrasonic wave to be filtered and the ultrasonic wave after filtering is produced for receiving, and the frequency spectrum corresponding with the ultrasonic wave after filtration to the frequency spectrum of pumping signal carries out calculation process, obtains the transmission spectrum corresponding with the operating temperature of artificial cycle structure.
In the present embodiment, the frequency spectrum data of the ultrasonic signal after utilizing ultrasonic probe, ultrasonic receiver 108 to calculate the pumping signal of generation needed for ultrasonic wave to be filtered respectively and filter, and both frequency spectrum datas are calculated, obtain the transmission spectrum corresponding with the operating temperature of artificial cycle structure thus.
In a preferred embodiment, ultrasonic probe, ultrasonic receiver 108 comprises signal receiving device and data processing equipment wherein: signal receiving device, transfers to computer for the ultrasonic wave after receiving pumping signal and filtering; Data processing equipment, the frequency spectrum corresponding with the ultrasonic wave after filtration for the frequency spectrum to pumping signal carries out calculation process.
In the present embodiment, the impulse ejection receiver that signal receiving device preferred computer controls, data processing equipment preferred computer.Computer, to the pumping signal received and the ultrasonic wave after filtering, carries out the frequency spectrum data of calculation process respectively.Concrete, Matlab program can be adopted, respectively Fourier transformation is carried out to pumping signal and the hyperacoustic time-domain signal after filtering and obtain corresponding frequency-region signal, and data acquisition is carried out to frequency-region signal, such as gather 50 data, the data collected are averaged, obtains the frequency spectrum data of pumping signal and frequency spectrum data corresponding to ultrasonic wave after filtering respectively.The frequency spectrum data of the hyperacoustic frequency spectrum data after filtration and pumping signal is divided by, obtains the transmission spectrum corresponding with the operating temperature of artificial cycle structure.
In one embodiment, as shown in Figure 5, provide a kind of based on the hyperacoustic method of artificial cycle structured filter, comprising:
Step 502, ultrasonic transmission device launches ultrasonic wave to be filtered.
Step 504, the to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls, and produces Lamb wave in the substrate of artificial cycle structure, and artificial cycle structure excites Lamb wave to produce transmission enhancing peak.
Step 506, temperature control equipment regulates and controls the phase transition temperature of operating temperature higher or lower than artificial cycle structure of artificial cycle structure.
Step 508, according to operating temperature, the transmission of artificial cycle structure regulating strengthens frequency corresponding to peak, and is gone out by the transmission ultrasonic wave after filtering.
In the present embodiment, ultrasonic wave to be filtered can be the ultrasonic wave within the scope of optional frequency, launches ultrasonic wave to be filtered by ultrasonic transmission device.The broadband ultrasonic wave to be filtered comprising multiple frequency can be incident to artificial cycle structure simultaneously.The to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls.Artificial cycle structure comprises substrate and multiple raised line, and multiple tab parallel is arranged on substrate and spacing distance is equal.Artificial cycle structure is fixed by sample stage, and concrete artificial cycle structure can being placed in the middle of sample stage is fixed.The substrate vibration of ultrasonic exciting artificial cycle structure to be filtered, produces Lamb wave in the substrate of artificial cycle structure.Artificial cycle structure excites Lamb wave to produce multiple transmission enhancing peak with zeroth order antisymmetric mode.Because transmission strengthens frequency corresponding to peak, be closely related with the parameter of artificial cycle structure.After the parameter of artificial cycle structure is determined, namely the multiple specific frequency that transmission strengthens peak corresponding is determined thereupon, and now hyperacoustic frequency of going out of artificial cycle structured filter is only relevant with temperature.Due to barium strontium titanate (Ba
0.7sr
0.3tiO
3) ferroelectric ceramic material is before and after phase transition temperature, its elastic modelling quantity and the hyperacoustic velocity of wave propagated wherein have larger change.Temperature control equipment regulates and controls the phase transition temperature of operating temperature higher or lower than artificial cycle structure of artificial cycle structure.According to operating temperature, the transmission of artificial cycle structure regulating strengthens the frequency at peak, is gone out by the transmission ultrasonic wave after filtering, obtains the ultrasonic wave after the filtration corresponding with operating temperature.Thus achieve by simple control and conveniently effectively filter out the ultrasonic wave corresponding with operating temperature.
In one embodiment, the step that the to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls, comprise: corresponding hyperacoustic frequency range to be filtered, adopt the artificial cycle structure of different parameters to modulate hyperacoustic frequency range to be filtered, parameter comprises at least one in substrate thickness, Cycle Length, raised line cross sectional shape and raised line sectional area.
In the present embodiment, hyperacoustic frequency range to be filtered is different, and the artificial cycle structure of different parameters can be adopted to modulate.Ultrasonic wave to be filtered can be launched by ultrasonic transducer.Frequency range due to ultrasonic transducer is limited, and as 1.5MHz-4.5MHz, and artificial cycle structure far away wider than in the frequency range of ultrasonic transducer, can produce transmission at multiple Frequency point and strengthen peak.Therefore, hyperacoustic frequency range to be filtered can be changed by changing ultrasonic transducer.The parameter of artificial cycle structure comprises at least one in substrate thickness, Cycle Length, raised line cross sectional shape and raised line sectional area.Raised line cross sectional shape can be rectangle, polygon or semicircle.Namely parameter difference represents that artificial cycle structure is different.For raised line cross sectional shape for rectangle, wideband for 1.5MHz ~ 4.5MHz ultrasonic wave to be filtered, can adopt that substrate thickness h2 is 0.5mm, Cycle Length d is 1mm, raised line cross sectional shape is rectangle, the width w of raised line sectional area is 0.6mm, the height h1 of raised line sectional area is the artificial cycle structure of the fence structure of 0.3mm.
In one embodiment, ultrasonic transmission device also comprises before launching hyperacoustic step to be filtered: sender unit launches pumping signal; Excitation signal energizes ultrasonic wave generating apparatus produces ultrasonic wave to be filtered.
In the present embodiment, the pumping signal that sender unit is launched can be continuation sinusoidal, also can be pulsed sinusoidal signal.Ultrasonic wave generating apparatus produces ultrasonic wave according to pumping signal.Sender unit preferred computer control impuls transceiver, the preferred ultrasonic transducer of ultrasonic wave generating apparatus.Ultrasonic transducer can be any one in single array element ultrasonic transducer, phase array transducer, linear array ultrasonic transducer, convex battle array ultrasonic transducer and interdigital transducer.Preferred further, pumping signal is pulsed sinusoidal signal, and ultrasonic transducer adopts single array element ultrasonic transducer.Such as, computer control impulse ejection receiver produce power is 12.5 μ J, frequency is the pulse signal of 100MHz, be subject to this pulse signal excitation ultrasonic transducer and produce 1.5MHz ~ 4.5MHz wideband ultrasonic wave to be filtered, its centre frequency is 3.5MHz, and focal length is 400mm.
In one embodiment, as shown in Figure 6, according to operating temperature, the transmission of artificial cycle structure regulating strengthens the frequency at peak, and also comprises after the step of being gone out by the transmission ultrasonic wave after filtering:
Step 602, the pumping signal received and the ultrasonic wave after filtering are inputted data processing equipment by signal receiving device.
Step 604, data processing equipment gathers the frequency spectrum data of pumping signal and frequency spectrum data corresponding to ultrasonic wave after filtering.
Step 606, the frequency spectrum data that data processing equipment is corresponding with the ultrasonic wave after filtration to the frequency spectrum data of pumping signal carries out calculation process, obtains the transmission spectrum corresponding with operating temperature.
In the present embodiment, signal receiving device preferred computer control impuls transceiver, data processing equipment preferred computer.Computer is controlled impulse ejection receiver and receives pumping signal and ultrasonic wave after the filtration that transmitted by artificial cycle structure, and by pumping signal and the input of the ultrasonic wave after filtering computer.Computer carries out calculation process to the pumping signal received and the ultrasonic wave after filtering respectively and obtains corresponding frequency spectrum data.Concrete, Matlab program can be adopted, respectively Fourier transformation is carried out to pumping signal and the hyperacoustic time-domain signal after filtering and obtain corresponding frequency-region signal, and data acquisition is carried out to frequency-region signal, such as gather 50 data, the data collected are averaged, obtains the frequency spectrum data of pumping signal and frequency spectrum data corresponding to ultrasonic wave after filtering respectively.The frequency spectrum data of the hyperacoustic frequency spectrum data after filtration and pumping signal is divided by, obtains the transmission spectrum corresponding with the operating temperature of artificial cycle structure.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. based on the hyperacoustic system of artificial cycle structured filter, it is characterized in that, described system comprises: ultrasonic transmission device, artificial cycle structure and temperature control equipment, wherein:
Described ultrasonic transmission device, for launching ultrasonic wave to be filtered;
Described artificial cycle structure, for regulating and controlling the ultrasonic wave described to be filtered of incidence, and produces Lamb wave in the substrate of described artificial cycle structure, and described artificial cycle structure excites described Lamb wave to produce transmission enhancing peak;
Described temperature control equipment, for regulating and controlling the phase transition temperature of operating temperature higher or lower than described artificial cycle structure of described artificial cycle structure;
Described artificial cycle structure, also strengthens frequency corresponding to peak for regulating and controlling described transmission according to described operating temperature, and is gone out by the transmission ultrasonic wave after filtering.
2. system according to claim 1, is characterized in that, described artificial cycle structure comprises substrate and multiple raised line, and described multiple tab parallel arranges on the substrate and spacing distance is equal.
3. system according to claim 2, is characterized in that, the parameter of described artificial cycle structure comprises at least one in substrate thickness, Cycle Length, raised line cross sectional shape and raised line sectional area;
Described artificial cycle structure comprises the artificial cycle structure of different parameters, and the corresponding described hyperacoustic frequency range to be filtered of artificial cycle structure of described different parameters, modulates described hyperacoustic frequency range to be filtered.
4. system according to claim 1, it is characterized in that, described system also comprises ultrasonic probe, ultrasonic receiver, producing pumping signal needed for described ultrasonic wave to be filtered with the ultrasonic wave after filtration and the frequency spectrum corresponding to the ultrasonic wave after the frequency spectrum of described pumping signal and described filtration carries out calculation process for receiving, obtaining the transmission spectrum corresponding with the operating temperature of described artificial cycle structure.
5. according to claim 1 to described system, it is characterized in that, described ultrasonic transmission device comprises sender unit and ultrasonic wave generating apparatus, wherein:
Sender unit, for launching pumping signal;
Described ultrasonic wave generating apparatus, for producing ultrasonic wave according to described pumping signal.
6. system according to claim 4, is characterized in that, described ultrasonic probe, ultrasonic receiver comprises signal receiving device and data processing equipment, wherein:
Described signal receiving device, transfers to described data processing equipment for the ultrasonic wave after receiving described pumping signal and described filtration;
Described data processing equipment, the frequency spectrum corresponding with the ultrasonic wave after described filtration for the frequency spectrum to described pumping signal carries out calculation process.
7., based on the hyperacoustic method of artificial cycle structured filter, described method comprises:
Ultrasonic transmission device launches ultrasonic wave to be filtered;
The described to be filtered ultrasonic wave of artificial cycle structure to incidence regulates and controls, and produces Lamb wave in the substrate of artificial cycle structure, and described artificial cycle structure excites described Lamb wave to produce transmission enhancing peak;
Temperature control equipment regulates and controls the phase transition temperature of operating temperature higher or lower than described artificial cycle structure of described artificial cycle structure;
According to described operating temperature, transmission described in described artificial cycle structure regulating strengthens frequency corresponding to peak, and is gone out by the transmission ultrasonic wave after filtering.
8. method according to claim 7, is characterized in that, the step that the described to be filtered ultrasonic wave of described artificial cycle structure to incidence regulates and controls, and comprising:
Corresponding described hyperacoustic frequency range to be filtered, adopt the artificial cycle structure of different parameters to modulate described hyperacoustic frequency range to be filtered, described parameter comprises at least one in substrate thickness, Cycle Length, raised line cross sectional shape and raised line sectional area.
9. method according to claim 7, is characterized in that, described ultrasonic transmission device also comprises before launching hyperacoustic step to be filtered:
Sender unit launches pumping signal;
Described excitation signal energizes ultrasonic wave generating apparatus produces ultrasonic wave to be filtered.
10. method according to claim 9, is characterized in that, described according to described operating temperature, and transmission described in described artificial cycle structure regulating strengthens the frequency at peak, and after the step of being gone out by the transmission ultrasonic wave after filtering, also comprises:
Ultrasonic wave after the described pumping signal received and described filtration is inputted data processing equipment by signal receiving device;
Described data processing equipment gathers frequency spectrum data corresponding to the ultrasonic wave after the frequency spectrum data of described pumping signal and described filtration;
The frequency spectrum data that described data processing equipment is corresponding with the ultrasonic wave after described filtration to the frequency spectrum data of described pumping signal carries out calculation process, obtains the transmission spectrum corresponding with described operating temperature.
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| CN109499829A (en) * | 2018-12-31 | 2019-03-22 | 陕西师范大学 | Ultrasonic vibration system and its radial vibration suppressing method based on phonon crystal slot |
| CN109583437A (en) * | 2019-02-02 | 2019-04-05 | 京东方科技集团股份有限公司 | A kind of display device |
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|---|---|
| CN104259080B (en) | 2016-08-17 |
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