CN109737992B - Sensor structure with periodic band gap structure - Google Patents
Sensor structure with periodic band gap structure Download PDFInfo
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- CN109737992B CN109737992B CN201910020207.8A CN201910020207A CN109737992B CN 109737992 B CN109737992 B CN 109737992B CN 201910020207 A CN201910020207 A CN 201910020207A CN 109737992 B CN109737992 B CN 109737992B
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/18—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying effective impedance of discharge tubes or semiconductor devices
- G01D5/183—Sensing rotation or linear movement using strain, force or pressure sensors
- G01D5/185—Sensing rotation or linear movement using strain, force or pressure sensors using piezoelectric sensors
Abstract
The invention discloses a sensor structure with a periodic band gap structure, which comprises a plurality of one-dimensional phononic crystal sector structures arranged concentrically and a plurality of piezoelectric sensors arranged on the inner sides of the one-dimensional phononic crystal sector structures in a one-to-one correspondence manner; the sensor structure is made of an acoustic metamaterial which is designed by adopting a periodic structure and forms an optical band gap structure, and the local resonance effect of the sensor structure on a special signal frequency band is utilized to enhance a sensing signal, so that the purpose of improving the sensitivity of the sensor is realized, and the designed sensor structure has special physical properties.
Description
Technical Field
The present invention relates to a sensor structure, and more particularly, to a sensor structure having a periodic bandgap structure.
Background
The research of the phononic crystal provides a new idea for the field of vibration control, and the phononic crystal is composed of two or more than two elastic materials and has a periodic composite structure with elastic wave band gap characteristics. An elastic wave forbidden band is formed when the elastic wave propagates in the photonic crystal, and the propagation of the elastic wave is inhibited within the frequency range of the forbidden band. In recent years, various researchers have made many beneficial researches on the bandgap control of phononic crystals. Band gap tuning is achieved from the initial tuned geometry (scatterer shape and lattice structure) to the use of the rheological properties of smart materials to achieve tuning of the energy band structure of phononic crystals.
Disclosure of Invention
The invention aims to: the sensor structure with the periodic band gap structure is made of an acoustic metamaterial which is designed by adopting the periodic structure and forms an optical band gap structure, and a sensing signal is enhanced by utilizing the local resonance effect of the acoustic metamaterial on a special frequency band of the signal, so that the aim of improving the sensitivity of the sensor is fulfilled, and the designed sensor structure has special physical performance.
The technical scheme of the invention is as follows: a sensor structure with a periodic band gap structure comprises a plurality of one-dimensional phonon crystal sector structures which are concentrically arranged, and a plurality of piezoelectric sensors which are arranged on the inner sides of the one-dimensional phonon crystal sector structures in a one-to-one correspondence manner; meanwhile, an air anti-interference area is arranged between the adjacent one-dimensional phonon crystal fan-shaped structures.
As a preferred technical scheme, the fan-shaped structure of the one-dimensional phononic crystal adopts a periodic round hole and/or a periodic square hole design.
As a preferred technical scheme, the piezoelectric sensors are arranged in a circular array manner, and gaps are formed between adjacent piezoelectric sensors.
As a preferred technical solution, the sensor structure includes six one-dimensional photonic crystal sector structures, and the six one-dimensional photonic crystal sector structures have different local resonance bands.
As a preferred technical solution, the one-dimensional photonic crystal sector structure is made of an acoustic metamaterial which is designed by a periodic structure and forms an optical band gap structure, the metamaterial is a new concept "Meta-material" which was originally proposed by scholars in studying "photonic crystals", and the optical band gap structure is formed mainly by the periodic structure design. Subsequent studies have derived from the optical band to the electromagnetic band. The invention utilizes the special periodic structure designed acoustic metamaterial and the unique performance of piezoelectric material to form a novel sensor with sensing function, which is characterized by high sensitivity of designing sound wave or vibration frequency band.
As a preferred technical scheme, the sensor structure is arranged in a circular shape, the outer diameter of the sensor structure is phi R, and the value range of the phi R is as follows: 100mm < φ R <500 mm.
As a preferred technical scheme, the thickness of the sensor structure is h, and the value range of h is as follows: 1mm < h <10 mm.
As a preferred technical scheme, the minimum gap between adjacent piezoelectric sensors is larger than 1 mm; the gap range between adjacent piezoelectric sensors is mainly determined by the number of high-sensitivity frequency bands of the sensors, when the number of frequency bands required by design is large, the gap range is reduced, and the minimum size only needs to meet the requirement that the minimum gap size between the adjacent piezoelectric sensors is larger than 1 mm.
The invention has the advantages that:
1. the invention is made of the acoustic metamaterial which is designed by adopting a periodic structure and forms an optical band gap structure, and the local resonance effect of the acoustic metamaterial on a special frequency band of a signal is utilized to enhance the sensing signal of a detector, thereby realizing the purpose of improving the sensitivity of the sensor and leading the designed sensor structure to have special physical performance.
The invention adopts a plurality of piezoelectric sensors to form an array sensor, and can effectively carry out vector analysis on signals.
The invention can also measure the local resonance frequency range of unknown metamaterial designs by gradually changing the external frequency.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of a sensor structure having a periodic bandgap structure in accordance with the present invention;
FIG. 2 is a schematic top view of a sensor structure having a periodic bandgap structure in accordance with the present invention;
fig. 3 is a side schematic view of a sensor structure of the present invention having a periodic bandgap structure.
Detailed Description
Example (b): referring to fig. 1, a sensor structure with a periodic band gap structure includes six concentrically arranged one-dimensional photonic crystal sector structures and six piezoelectric sensors arranged inside the one-dimensional photonic crystal sector structures in a one-to-one correspondence manner; six one-dimensional phononic crystal fan-shaped structures which are concentrically arranged are respectively A1, A2, A3, A4, A5 and A6, different local resonance bands are realized by changing internal parameters of the six one-dimensional phononic crystal fan-shaped structures, elastic waves need to be transmitted to piezoelectric sensors C1, C2, C3, C4, C5 and C6, and then the elastic waves need to pass through corresponding metamaterial A1, A2, A3, A4, A5 and A6, and due to the local resonance effect of the metamaterial, the elastic waves of the frequencies in the resonance bands can be enhanced. Because of the design of the multi-band metamaterial and the different local resonance frequencies, the multi-band metamaterial can enhance frequency signals in a larger range so as to achieve the effect of improving the sensitivity, and can also be applied to detecting weak elastic wave signals, and the local resonance of the metamaterial can enhance the signals, thereby being beneficial to subsequent signal processing and other researches.
Meanwhile, an air anti-interference area is arranged between adjacent fan-shaped structures of the one-dimensional phononic crystal, and the air anti-interference area has the function that elastic waves cannot interfere with each other when being transmitted by A1, A2, A3, A4, A5 and A6.
Referring to fig. 2 and 3, six one-dimensional photonic crystal sector structures of the present invention are all made of an acoustic metamaterial which is designed by a periodic structure and forms an optical band gap structure, and the dimension parameters and the shape of each sector acoustic metamaterial are different, and are generally designed by periodic round holes and/or periodic square holes, and the six one-dimensional photonic crystal sector structures have different local resonance bands. Meanwhile, the sensor structure is arranged in a circular shape, the outer diameter of the sensor structure is phi R, and the value range of the phi R is as follows: 100mm < φ R <500 mm; the thickness is h, and the value range of h is as follows: 1mm < h <10 mm.
Referring to fig. 1, the piezoelectric sensors of the present invention are arranged in a circular array, and the adjacent piezoelectric sensors are spaced apart from each other, and the minimum gap is greater than 1 mm; the gap range between adjacent piezoelectric sensors is mainly determined by the number of high-sensitivity frequency bands of the sensors, when the number of frequency bands required by design is large, the gap range is reduced, and the minimum size only needs to meet the requirement that the minimum gap size between the adjacent piezoelectric sensors is larger than 1 mm.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A sensor structure with a periodic band gap structure is characterized by comprising a plurality of one-dimensional phononic crystal sector structures which are concentrically arranged and a plurality of piezoelectric sensors which are correspondingly arranged on the inner sides of the one-dimensional phononic crystal sector structures one by one; meanwhile, an air anti-interference area is arranged between adjacent one-dimensional phononic crystal sector structures;
wherein, the fan-shaped structures of the plurality of one-dimensional phononic crystals arranged concentrically form different local resonance bands.
2. The sensor structure with periodic bandgap structure according to claim 1, wherein the one-dimensional phononic crystal sector structure is designed with periodic round holes and/or periodic square holes.
3. The sensor structure with a periodic bandgap structure according to claim 1, wherein the piezoelectric sensors are arranged in a circular array with a gap between adjacent piezoelectric sensors.
4. The sensor structure of claim 1, wherein the sensor structure comprises six one-dimensional phononic crystal sector structures.
5. The sensor structure with periodic bandgap structure of claim 1, wherein the one-dimensional phononic crystal sector structure is made of an acoustic metamaterial with periodic structure design and forming an optical band bandgap structure.
6. The sensor structure with a periodic bandgap structure according to claim 1, wherein the sensor structure is arranged in a circle with an outer diameter Φ R, and the range of values of Φ R is as follows: 100mm < φ R <500 mm.
7. The sensor structure of claim 1, wherein the thickness of the sensor structure is h, and the range of values of h is as follows: 1mm < h <10 mm.
8. The sensor structure with a periodic bandgap structure according to claim 1, wherein the minimum gap between adjacent piezoelectric sensors is greater than 1 mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910020207.8A CN109737992B (en) | 2019-01-09 | 2019-01-09 | Sensor structure with periodic band gap structure |
| PCT/CN2020/070980 WO2020143687A1 (en) | 2019-01-09 | 2020-01-08 | Sensor structure having periodic band gap structure |
| LU101962A LU101962B1 (en) | 2019-01-09 | 2020-01-08 | Sensor structure with periodic band gap structure |
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| CN201910020207.8A CN109737992B (en) | 2019-01-09 | 2019-01-09 | Sensor structure with periodic band gap structure |
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| CN109737992A CN109737992A (en) | 2019-05-10 |
| CN109737992B true CN109737992B (en) | 2020-11-06 |
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| LU (1) | LU101962B1 (en) |
| WO (1) | WO2020143687A1 (en) |
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| CN109737992B (en) * | 2019-01-09 | 2020-11-06 | 苏州星航综测科技有限公司 | Sensor structure with periodic band gap structure |
| CN110353624A (en) * | 2019-07-19 | 2019-10-22 | 南昌航空大学 | A method of cornea scattered signal is amplified based on phonon crystal resonance technique |
| CN113067498B (en) * | 2021-03-01 | 2022-12-16 | 同济大学 | Multilayer plate energy harvesting structure based on defect state acoustic metamaterial |
| CN115840218B (en) | 2023-02-23 | 2023-05-23 | 青岛哈尔滨工程大学创新发展中心 | Navigation communication integrated metamaterial sonar for underwater vehicle |
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| JPS5814588A (en) * | 1981-06-24 | 1983-01-27 | ハンス・リスト | Implement having piezoelectric element |
| CN102620808A (en) * | 2012-03-23 | 2012-08-01 | 哈尔滨工程大学 | Local resonance type phononic crystal filtering optical fiber hydrophone |
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| CN102928844A (en) * | 2012-11-08 | 2013-02-13 | 中北大学 | Underwater sub-wavelength resolution ratio three-dimensional imaging method |
| CN107889537A (en) * | 2015-06-01 | 2018-04-06 | 通用电气(Ge)贝克休斯有限责任公司 | Substantially artificial unit for acoustic lens |
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| CA2606439C (en) * | 2005-04-29 | 2016-08-23 | The Board Of Trustees Of The Leland Stanford Junior University | High-sensitivity fiber-compatible optical acoustic sensor |
| JP5761192B2 (en) * | 2010-07-23 | 2015-08-12 | 日本電気株式会社 | Oscillator and electronic device |
| CN102824190B (en) * | 2012-09-24 | 2015-02-04 | 深圳大学 | Two-dimensional annular phased array ultrasonic transducer structure |
| WO2017132517A1 (en) * | 2016-01-27 | 2017-08-03 | Maui Imaging, Inc. | Ultrasound imaging with sparse array probes |
| CN105931628B (en) * | 2016-04-18 | 2018-12-04 | 西安建筑科技大学 | A kind of phonon crystal axis of the discretization rubber layer with low frequency vibration damping characteristic |
| CN107045868B (en) * | 2017-01-09 | 2020-03-06 | 温州大学 | Local resonance type phononic crystal periodic coating structure |
| CN206946932U (en) * | 2017-06-14 | 2018-01-30 | 西北工业大学 | A kind of three-dimensional locally resonant type phonon crystal |
| CN108492815B (en) * | 2018-05-23 | 2023-07-25 | 中国工程物理研究院总体工程研究所 | Folded beam photonic crystal with broad low band gap characteristics |
| CN108980276B (en) * | 2018-07-26 | 2019-12-31 | 华东交通大学 | High-speed train wheel damping ring based on phononic crystal |
| CN109737992B (en) * | 2019-01-09 | 2020-11-06 | 苏州星航综测科技有限公司 | Sensor structure with periodic band gap structure |
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- 2019-01-09 CN CN201910020207.8A patent/CN109737992B/en active Active
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- 2020-01-08 WO PCT/CN2020/070980 patent/WO2020143687A1/en active Application Filing
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814588A (en) * | 1981-06-24 | 1983-01-27 | ハンス・リスト | Implement having piezoelectric element |
| CN102841138A (en) * | 2011-06-24 | 2012-12-26 | 新疆求是信息科技有限公司 | Surface acoustic wave gas sensor based on two-dimensional phonon crystal reflecting grating |
| CN102620808A (en) * | 2012-03-23 | 2012-08-01 | 哈尔滨工程大学 | Local resonance type phononic crystal filtering optical fiber hydrophone |
| CN102928844A (en) * | 2012-11-08 | 2013-02-13 | 中北大学 | Underwater sub-wavelength resolution ratio three-dimensional imaging method |
| CN107889537A (en) * | 2015-06-01 | 2018-04-06 | 通用电气(Ge)贝克休斯有限责任公司 | Substantially artificial unit for acoustic lens |
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| Publication number | Publication date |
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| LU101962A1 (en) | 2020-08-05 |
| CN109737992A (en) | 2019-05-10 |
| WO2020143687A1 (en) | 2020-07-16 |
| LU101962B1 (en) | 2020-11-30 |
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