CN201589768U - Device for testing two-dimensional phonon crystal band gap - Google Patents
Device for testing two-dimensional phonon crystal band gap Download PDFInfo
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- CN201589768U CN201589768U CN2010200469971U CN201020046997U CN201589768U CN 201589768 U CN201589768 U CN 201589768U CN 2010200469971 U CN2010200469971 U CN 2010200469971U CN 201020046997 U CN201020046997 U CN 201020046997U CN 201589768 U CN201589768 U CN 201589768U
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Abstract
The utility model provides a device for testing a two-dimensional phonon crystal band gap, belonging to the field of condensed matter physics. The device for testing the two-dimensional phonon crystal band gap is characterized in that the device comprises a phonon crystal sample, an immersed type straight probe composed of an excitation probe and a receiving probe, a pulse generating/receiving instrument and an oscilloscope, wherein the phonon crystal sample consists of metallic columns arranged in parallel to each other according to the lattice and water in a water tank, the metallic columns arranged in parallel to each other according to the lattice are placed into holes processed on a Yakeli board by a laser technology for fixing, the centers of the excitation probe and the receiving probe of the immersed type straight probe are fixed on one straight line, the excitation probe and the receiving probe are symmetrically placed into the water tank and are connected with the pulse generating/receiving instrument by a lead, and the pulse generating/receiving instrument is connected with the oscilloscope by a lead. The device can test the phonon band gap simply and conveniently, and also can obtain the defective property of the phonon crystal.
Description
Technical field
The utility model is a kind of device of testing two-dimension phonon crystallographic direction band gap, belongs to the Condensed Matter Physics field.
Background technology
In recent years, people have produced keen interest to classical ripple (comprising electromagnetic wave and elastic wave) in the research of artificial half period zones gap material propagation characteristic.When elastic wave or sound wave are propagated therein, be subjected to the periodic structure constraint and form the Bloch ripple, the maximum feature of Bloch ripple is can not propagate or see through (claiming that this frequency range is band gap or forbidden band) in certain frequency scope self-energy, and we claim that this class periodic structure is a phonon crystal.Phonon crystal is by the compound vocal cords crack functional material of different crystalline lattice periodic arrangement by two or more elastic medium.Utilize its bandgap properties, can design brand-new vibration isolation, acoustic damping materials; Utilize its defect state character, can also design wave filter, coupling mechanism, separation vessel etc., so phonon crystal has a wide range of applications in the engineering field.
Research needs experiment test to two-dimentional solid-liquid phonon crystal band gap, so that proof theory result of calculation.At present, phonon crystal sample development usually on steel plate or aluminium sheet machine drilling fix scatterer, they are positioned over form complex media in the water then.But the pore volume of processing precise easily causes its distortion on sheet metal, so that influences the periodicity of phonon crystal.
The utility model content
The purpose of this utility model is in order to solve the experiment test of two-dimentional solid-liquid phonon crystal bandgap properties, to design a kind of device of easy test band gap.This device can be tested the vocal cords crack simply and easily, can also record phonon crystal defect state character.
To achieve these goals, the utility model provides a kind of device of testing two-dimension phonon crystallographic direction band gap, it is characterized in that: comprise the phonon crystal sample, comprise incentive probe and receiving transducer soak formula normal probe, pulse generation/receiving instrument, oscillograph, described phonon crystal sample is made up of the water in metal column that is parallel to each other by lattice arrangement and the water tank, and the above-mentioned metal column that is parallel to each other by lattice arrangement is placed in the hole that is processed on acrylic board by laser technology and fixes; Soak the incentive probe of formula normal probe and receiving transducer center fixation point-blank; Incentive probe and receiving transducer symmetry are put into water tank, connect pulse generation/receiving instrument by lead, and pulse generation/receiving instrument connects oscillograph by lead.
The phonon crystal sample is made up of by lattice arrangement the metal column that is parallel to each other.Since acrylic board have that toughness is strong, machining property is good etc. characteristics, the high-precision hole of employing Laser Processing on it can guarantee the strict periodicity of phonon crystal like this.
Based on ultrasonic immersion through-transmission technique, utilize the proving installation of the utility model two-dimension phonon crystal band gap, experiment records band gap along the Γ-M and the Γ-K direction of the phonon crystal first brief Brillouin zone, and band gap frequency overlapping portion is a complete band gap.With the sub-crystal of two honeycomb lattice two dimensions steel/underwater sound is example, and their experimental result and Theoretical Calculation can be good at coincideing, and can illustrate that thus the proving installation performance of two-dimension phonon crystal band gap of development is good, it is simple, practical to make.
Description of drawings
Fig. 1 (a) bi-dimensional cellular lattice phonon crystal sectional view and ripple are propagated along first brief Brillouin zone Γ-M and Γ-K direction; Fig. 1 (b) honeycomb lattice first Brillouin zone.
Fig. 2 honeycomb lattice acrylic board figure.
Fig. 3 (a) is the band gap along Γ-M direction test phonon crystal, and Fig. 3 (b) is the band gap along Γ-K direction test phonon crystal.
Among the figure: 1. water tank, 2. metal column, 3. incentive probe, 4. receiving transducer, 5. water, 6. pulse generation/receiving instrument, 7. oscillograph.
Fig. 4 (a) is the band structure of the sub-crystal of bi-dimensional cellular lattice steel/underwater sound, and Fig. 4 (b) and 4 (c) are respectively the Γ-M of the sub-crystal of bi-dimensional cellular lattice steel/underwater sound and the transmission spectrum of Γ-K direction.
Embodiment
Referring to Fig. 3, adopt laser technology, on acrylic board, bore the hole (referring to Fig. 2) of honeycomb arrangement, and, place this sample then and in water tank, form the sub-crystal prototype of two-dimentional steel/underwater sound constituting sample in metal column 2 embedded holes.During experiment, at first incentive probe 3, receiving transducer 4 are placed water tank 1, and the center that makes two probes point-blank, carrying out the test macro calibration; Secondly, phonon crystal is placed between the probe; The burst pulse that pulse generation/receiving instrument 6 produces, be loaded into incentive probe and produce compressional wave, compressional wave impinges perpendicularly in the phonon crystal along the Γ-M and the Γ-K direction of the first brief Brillouin zone respectively, use oscillograph 7 records and show the response signal that receiving transducer obtains, again response signal is carried out the transmission spectrum that fast fourier transform can get both direction, the frequency coincidence scope of gained transmission spectrum is exactly a complete band gap.Figure (a) is the band gap along Γ-M direction test phonon crystal, and figure (b) is the band gap along Γ-K direction test phonon crystal.
Referring to Fig. 4, figure (a) be the band structure of the sub-crystal of bi-dimensional cellular lattice steel/underwater sound, figure (b) and (c) be respectively the transmission spectrum of Γ-M and Γ-K direction, and the width of dotted line is to test to record bandgap range among the figure.The phonon crystal calculating parameter: steel column is 1.5mm, and adjacent steel column centre distance is 2.0mm, and filling rate is 34%.The scope in the Theoretical Calculation phonon crystal first complete forbidden band is 205～277kHz, and the complete forbidden band of examination that experiment is surveyed is 210～285kHz.
Claims (1)
1. device of testing two-dimension phonon crystallographic direction band gap is characterized in that: comprise the phonon crystal sample, comprise incentive probe and receiving transducer soak formula normal probe, pulse generation/receiving instrument, oscillograph; Described phonon crystal sample is made up of the water in metal column that is parallel to each other by lattice arrangement and the water tank, and the above-mentioned metal column that is parallel to each other by lattice arrangement is placed in the hole that is processed on acrylic board by laser technology and fixes; Soak the incentive probe of formula normal probe and receiving transducer center fixation point-blank; Incentive probe and receiving transducer symmetry are put into water tank, connect pulse generation/receiving instrument by lead, and pulse generation/receiving instrument connects oscillograph by lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200469971U CN201589768U (en) | 2010-01-21 | 2010-01-21 | Device for testing two-dimensional phonon crystal band gap |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010200469971U CN201589768U (en) | 2010-01-21 | 2010-01-21 | Device for testing two-dimensional phonon crystal band gap |
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| CN201589768U true CN201589768U (en) | 2010-09-22 |
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| CN2010200469971U Expired - Fee Related CN201589768U (en) | 2010-01-21 | 2010-01-21 | Device for testing two-dimensional phonon crystal band gap |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938251A (en) * | 2012-11-16 | 2013-02-20 | 广东工业大学 | Two defect-state-acquired two-dimensional phononic crystal structures |
| CN103246807A (en) * | 2013-04-26 | 2013-08-14 | 北京工业大学 | Two-dimensional solid-solid photonic crystal hybrid mode band gap optimization method |
| CN109378559A (en) * | 2018-10-24 | 2019-02-22 | 中山大学 | A kind of radio-frequency filter with periodic structure |
| CN109632959A (en) * | 2019-01-10 | 2019-04-16 | 浙江大学 | The test macro of two-dimentional soft material phonon crystal band gap |
| CN112580210A (en) * | 2020-12-22 | 2021-03-30 | 中国铁路设计集团有限公司 | Vibration isolation frequency band regulation and control design method for one-dimensional periodic cushion layer vibration reduction ballast bed |
| CN115638870A (en) * | 2022-09-28 | 2023-01-24 | 哈尔滨工程大学 | Test device and test method for testing vibration characteristics of photonic crystal |
-
2010
- 2010-01-21 CN CN2010200469971U patent/CN201589768U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938251A (en) * | 2012-11-16 | 2013-02-20 | 广东工业大学 | Two defect-state-acquired two-dimensional phononic crystal structures |
| CN103246807A (en) * | 2013-04-26 | 2013-08-14 | 北京工业大学 | Two-dimensional solid-solid photonic crystal hybrid mode band gap optimization method |
| CN103246807B (en) * | 2013-04-26 | 2016-12-28 | 北京工业大学 | A kind of two-dimensional solid solid photonic crystal hybrid mode band gap optimization method |
| CN109378559A (en) * | 2018-10-24 | 2019-02-22 | 中山大学 | A kind of radio-frequency filter with periodic structure |
| CN109378559B (en) * | 2018-10-24 | 2019-09-24 | 中山大学 | A kind of radio-frequency filter with periodic structure |
| CN109632959A (en) * | 2019-01-10 | 2019-04-16 | 浙江大学 | The test macro of two-dimentional soft material phonon crystal band gap |
| CN112580210A (en) * | 2020-12-22 | 2021-03-30 | 中国铁路设计集团有限公司 | Vibration isolation frequency band regulation and control design method for one-dimensional periodic cushion layer vibration reduction ballast bed |
| CN115638870A (en) * | 2022-09-28 | 2023-01-24 | 哈尔滨工程大学 | Test device and test method for testing vibration characteristics of photonic crystal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20140121 |